Freestyle Libre - Going for the hat-trick?

Abbott have been able to announce a couple of really exciting bits of news in the last few weeks. Just in case you hadn't heard here they are...

Libre approved for use in children
The lovely Lesley Joseph from INPUT was attending ATTD 2016 (Advanced Technologies & Treatments for Diabetes) in Milan last week and was excited to share a glimpse of one of the presentations where Abbott announced that they had achieved a license for Libre in children. This was enthusiastically shared on social media along with another of the slides from the conference with some of the details from the study.

This is really good news for parents of children with diabetes who have been wanting to try the Libre as part of their diabetes management toolkit. It also reassures those who jumped in early before approval and used the Libre 'off license' for their children that they can now contact Abbott with a happy heart if they have any problems or need any advice.

Not to be outdone, Abbott themselves made an official announcement soon afterwards. Unsurprisingly choosing overnight testing as a particularly useful time to have a Libre in use. A lot less hassle to wave a reader through the duvet than to have to get a lancet out at 3am and rouse your slumbering child.

This welcome news came pretty hot on the heels of another long-awaited update in the story of the Libre...

No more waiting list
Following the launch of their new high volume production facility in January, Abbott have been able to clear the UK waiting list and the Libre can now be bought by anyone without having to wait. I heard about this a good few weeks back, but was a little cautious to mention it until I could actually see the results (we have been here before remember). However a week or so ago the news on TwitFace and other Social Bloggings was that, yes, the waiting list is no more. Hurrah!

At the same time, I had also heard from Abbott that they were beginning to roll out an official smartphone app that allows people who have a phone with an NFC chip to dispense with the reader and just use their phone to take Libre readings. I can't say much more than that as it has currently only launched in Sweden, but being able to ditch the separate meter certainly appeals to me. There are a couple of 'home spun' Android apps that attempt to do the same, but an official one from Abbott would reassure users that it has had to be put through all of the regulatory rigours of the handset itself. I will watch this one with interest (though I suspect as it stands no iPhone version will be possible because of the way Apple limits access to the iPhone 6's NFC chip).

I have not heard any more information about plans to launch either the Libre itself, or the app in more countries (though I know the UK is next on the list for app launch), but I have been promised a bit of a catch-up with Abbott in the near future and will keep you posted if I hear anything else.

The next big thing?
What would make this perfect for UK readers, of course, would be the announcement that the Libre was to become available on prescription via the NHS. Rumours and grapevine whisperings suggest that this might be tantalisingly close, but as yet remains elusive.

It seems there was much talk at ATTD about CGM (and other continuous monitoring options) and sensor-augmented pump therapy (Smartguard and other Artificial Pancreas dual or triple hormone technologies) so we will all be watching with interest.

If you hear any juicy gossip or rumours, do share them in the comments below.

Edinburgh, encouragement and a call to arms

This week I have been lucky enough to be invited to speak at the 55th St Andrew's Day Symposium, hosted by the Royal College of Physicians in Edinburgh. I was given the topic of 'apps and technology' in relation to managing a long-term condition like diabetes, but obviously - not content with that - I managed to sprinkle in a wafer-thin analogy of what living with type 1 is like, along with all sorts of stuff about the #doc and the transformative potential of online peer support communities.

I tried to cover the infuriatingly fickle nature of type 1 diabetes, mentioned a few 'old favourites' like mySugr and the Accu-Chek Expert which have helped me attempt to tame my own 'diabetes monster' and also just a few of the many other things that I know help others in different ways. Gathering data and then learning to be able to apply it to make small improvements. Not forgetting, of course, the support you can get from those facing the same battles every day, whether in terms of just keeping going when it all falls to pieces (again!), or in people sharing experiences and strategies that work for them that you can consider for your own self-management.

It seemed to go relatively well, and people were very encouraging - but the absolute stand-out for me about the whole experience were the conversations I had with some passionate diabetologists after the session had ended. I had deliberately avoided focussing too much attention on the more obvious technological advances like pumps and CGM, as I had wanted the talk to have as wide a reach as possible, and also perhaps fire the imaginations of clinicians working in other disciplines as to how they might make use of similar apps/peer support resources in their own specialism.

Speaking to those diabetes specialists afterwards was something of a call to arms. Much money is being spent on healthcare in the UK which does *not* have the ongoing quality of life benefit for individuals that sensor augmented pump therapy offers - let alone the extension of life for pump users as shown in recent research. The case was made to me that it is time the diabetes online community stopped being so darned understanding about the lack of funding for sensor-augmented pump therapy. The time for accepting defeat has passed, and as more and more data are made available from increasingly positive trials, we need to start banging the table if we are ever to move pump/CGM into the mainstream in the UK.

I got the distinct feeling that there are many clinicians who feel strongly that this is the way forward for type 1 care, but that patient voices as part of that change are crucial. Certainly the impact of patient support in Scotland's wider adoption of pump therapy in recent years sets an encouraging precedent.

Yes I *know* we go on about it all the time among ourselves (often with a resigned sigh and bit of self-funding) - but perhaps the moment has come to really start ramping up the pressure.

Disclaimer. My travel, and accommodation was paid for, but I was not paid to prepare or deliver my talk. I was also invited to attend a swanky dinner at the end of the Symposium which was lovely.

64 Days with the Medtronic 640G: Ep 8 Fine-Tuning SmartGuard

For all the times when SmartGuard has worked brilliantly for me (and there are - too many to count), there have also been a number of situations in which it seemed to make a bit of a mess of things. Overshooting and leaving my higher than I'd like... kicking in when a hefty carb load was just about to arrive and stopping basal for that 30 minute minimum (during which time I would be having a high glucose alert)... or cancelling various parts of dual and square wave boluses which I then may not spot until slightly too late.

I'm sure each user would have their own list - but these are my own #SmartGuardFails and some of the techniques I have tried to fine-tune the alerts and levels to work around them. It's interesting how irritating these odd occasions can be, and I suspect it is only because, well for me anyway, SmartGuard has worked so *brilliantly* for so much of the time that they really stand out.

If you have any MM640G SmartGuard tips and tricks of your own (or any other comments or questions), please leave a comment below.

64 Days with the Medtronic 640G: Ep 7 Overnight Hypoglycaemia

Those of you who can remember way back when this blog started (if you even exist, you have my undying affection for your extraordinary stickability) may recall that we were prompted to start writing a blog about my diabetes as a family after a particularly nasty overnight hypo. It was the beginning of me realising that I was *nothing* like as good at the whole 'pretending to be my own pancreas' lark as I had managed to convince myself that I was. I began to realise how much I didn't know, and that one event led me to connect with literally thousands of others wrestling their own diabetes into submission every day. My life, and particularly my diabetes management are very much the better for it.

Overnight hypos have been a bit of a recurring theme throughout my 25 years of living with type 1 diabetes. I am lucky in that I have never needed paramedic callouts, but there were many times along the way when Jane had to step in at breakfast time to 'bring me round' in the years before we started writing this blog. I look back at those early posts and am bewildered and ashamed that it took me quite so long to realise how much effect this was having on everybody else in the family. How unfair it was on them. At the time though, I guess I had convinced myself that my management was 'as good as could be expected'. I knew I was having 'A few too many highs... a few too many lows'. But doesn't everyone?

If you are the sort of person who approaches anywhere near 8 hours a night when you live with type 1 diabetes, you are spending fully a third of every day in the land of nod. That is an awful lot of time for things to go wrong - especially if your basal insulin dose is not adjusted correctly* or your requirements have moved since you last checked. You may be lucky enough to get clanging warning signs when you dip below 4.0mmol/L - enough to wake you up and sort yourself out. But you can't rely on them. And the more and longer the periods you spend below 4 during the night, the more of a hammering your hypo awareness will take and the less you will feel them. A classic vicious circle.

I am coming toward the end of my 64 days with the MiniMed 640G now (Medtronic have kindly allowed me to keep hold of their toy for a little while longer as there are a couple more posts I'd like to put together). Today seemed like a good opportunity to gather some of the snippets of video that I've been filming since the beginning and edit them into a 'SmartGuard vs Overnight Hypoglycaemia' post. Has Smartguard made any difference? Has my overnight hypoglycaemia reduced at all?

Watch the video below to find out what has been happening over the last 9 weeks. As always, I'd love to hear your comments or any questions, please leave them below or post on my Youtube channel.



*During the video, I mention how important I have found the concept of basal testing over the last few years, both on MDI (multiple daily injections) and also on a pump. Systematically testing and adjusting my basal insulin on an ongoing basis helps me to keep my meal doses and corrections working more or less as I expect them to (ha!). It was one of the most significant 'new concepts' I discovered when I first started comparing notes with other people with type 1 diabetes online. If you'd like to know more read this post by Gary Scheiner (Think Like a Pancreas) which explains the principle. It is written for pump users, but would be easy to adapt for once- or twice-daily basal insulin injection on MDI.

64 Days with the Medtronic 640G: Ep 6 Ordering supplies online

In some ways one of the nicest additions to my general 'managing diabetes malarky' over the past 12 months or so has not really been anything to do with managing blood glucose levels or complicated diabetes technology at all. It has been a very simple addition to my routine in that Medtronic, as of the middle of last year, became the first and only UK insulin pump company to set up an online 'e-shop' for re-ordering pump supplies. This means I can place an order for new infusion sets, reservoirs and other gubbins 24 hours a day, 7 days a week. Best of all the process is nicely streamlined, so it only takes me a handful of 'clicks' to place an order, which is then usually delivered in approximately 3-5 working days. I never had a real problem with phoning the orderline and speaking to the (always very helpful and lovely) staff at the other end... But the e-shop is just completely effortless and means I can place an order whenever I want to.

I'm not the most organised of people, and can easily get distracted when intending to re-order my supplies, then forget all about it. n fact I try to re-order deliberately early jyst to make sure I don't get caught out. So it's a great help to me that I can go online and place an order whenever I think about it, rather than having to wait until a customer-care phoneline is open and try again.

There are other benefits for registering with Medtronic's e-shop too. Registered users get access to an online e-support newsletters 'MiniMed Care Connect', with hints and tips covering things like sick day rules, sport/exercise, back-to-school suggestions and generally getting the most of your insulin pump. There are also promotions and cost-savings available to registered users including a soon-to-launch 'loyalty scheme' which offers reductions in the cost of Enlite sensors for those who are self-funding. More on that as details emerge...

In the meantime, here's a quick video of the process:


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64 Days with the Medtronic 640G: Ep 4 SmartGuard vs Mountain

We have just returned from a wonderful holiday among the Black Mountains, Brecon Beacons and Cambrian Mountains in the middle of Wales. The weather was as mixed as you might expect, but we did grab the opportunity of one of several gloriously sunny days to walk the popular path up Corn Du and Pen Y Fan which the walking guide proclaims to be 'the highest peaks in southern Britain' (presumably Snowdon counts as ooop North).

It seemed like a reasonable 'test case' for SmartGuard and exercise for me. Things were a little complicated by a fairly active morning with a fairly hefty Temporary Basal Rate which I had slightly overdone so as to be confident to drive, meaning that I approached lunchtime in pretty much double figures (180ish for US readers). Often I would choose to reduce my pre-exercise meal bolus a little, because I tend to get very sensitive to any active insulin once I start moving. I didn't want to do that this time though as I was fairly high to start with and in some dim corner of my mind there is something squirreled away about exercising at high levels being Not The Best Idea.

So there you go... the scene is set, the reality TV style 'manufactured peril' is in place (Solemn face to camera... 'But exercising at those levels, and with all that insulin on board - just what will happen')...

Let the drama unfold.

Oh, and as if that were not enough excitement, you may notice I am sporting an impromptu 'holiday beard' in this video. Feel free to express your opinion, hilarity or horror at this unexpected turn of events by voting #beardyes or #beardno in the comments.

Thanks, as ever, for watching.

Any questions or comments, please leave them below.


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64 Days with the Medtronic 640G: Ep 3 What is SmartGuard?

Here's another little update on my time with the Medtronic MiniMed 640G. This time it's a look at what SmartGuard is and how it works. When someone first tried to explain how SmartGuard worked to me I can remember it felt bewilderingly complicated, with all sorts of levels and numbers flying around. Actually once you have got your head around it, I have found it relatively simple - so I'm trying to explain it here with a little animated diagram that tries to work through an example of how and when Smartguard is activated, and what it does.

It should be remembered, of course, that for all it's magic, SmartGuard is not supposed to replace hypo-treatment entirely. Unfortunately for all the over-enthusiastic media hype about the 'Artificial Pancreas' when the MM640G launched, we are nothing like there yet. SmartGuard is a useful step in the right direction, but a full AP it ain't. For starters, there are many situations in which stopping your basal insulin will simply not act quickly enough, or have enough impact, to head off an impending low. And there are other situations where SmartGuard might be triggered for all the right reasons, but not actually have been needed and you end up higher than you'd like because of it.

I'll cover some of those situations in more detail in another blog - but for now, let's focus on those gentle (or not so gentle) drifts below 4.0 which SmartGuard effortlessly squashes without bothering you with any irritating alarms.

When it works well, it genuinely feels like you have a little 'diabetes helper' by your side, actively looking out for you. Not something I have ever felt about any other piece of diabetes technology.

If you have any questions or comments, please do leave them below. I'd love to hear what you think.


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64 Days with the Medtronic 640G: Ep 2 The first 28 days' results

I wasn't expecting to be posting this blog today (well it seems like it'll be tomorrow by the time it has uploaded, but it's still today as I'm typing this). I had a vague plan that I'd do an introductory blog, and then move on to explain what SmartGuard was and how it worked. But today marks 4 weeks since I have been living with the MiniMed 640G and having looked at the results so far to say I am impressed is an understatement.

Ever since diagnosis, if I'm honest, I have preferred to run on the low side rather than on the high side. Lows were quick to sort out and usually involved eating something sweet and tasty, while highs took much longer to come down and, while they did not make me feel particularly grim like they do for many people, they also carried with them the spectre of all those diabetes nasties waiting in the wings. Blindness, kidney failure and amputation vs fruit pastilles seemed an easy choice to make.

Of course running on the low side and 'preferring' hypos is not a brilliant plan. My hypo awareness began to take rather a dent and I spent many years with significant hypo unawareness and the severe hypos that go with it, especially overnight. Looking back I am ashamed that I did not realise the pressure and stress that this placed on my whole family and especially Jane.

Pretty much since we began writing this blog I began to try to reduce my incidence of hypoglycaemia and regain my warning signs, and generally wrestle my diabetes into behaving itself a little better. I have put quite a bit of work in and learned a lot. Thankfully I have not had an episode of Severe Hypoglycaemia for something like 3 or 4 years now - long enough ago that I can't remember anyway. But for all the success there have remained a stubborn few dips under 4 (which may or may not be hypos depending on your definition) that I have been unable to tame.

This video blog examines what effect SmartGuard has had to my results in these first 4 weeks.


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Abbott Freestyle Libre available to new customers again

There were excited murmerings on Facebook last week and on Friday I received a phone call that confirmed what many, many people have been waiting for over the last few months.

Abbott have begun to take on new customers for the Freestyle Libre again

Wooooo hoooooooo!!!

I think it is probably fair to say that Abbott were a little taken aback by the level of demand for their new toy immediately after launch (the Libre 'flash' glucose not-quite-CGM monitor). It wasn't long before they realised that consumer enthusiasm was going to outstrip their production capabilites and they took a tough decision to stop taking on new customers in order to protect supply to those who had signed up first. Probably the right thing to do, but pretty frustrating for many people - myself included, who hadn't quite got around to registering with their e-shop early on.

Some people have got quite cross about this, but I'm more inclined to give them the benefit of the doubt. This was a completely new piece of technology in a relatively small market place (certainly in the UK). They had to anticipate what sort of level of early take-up there might be, but it's not entirely surprising that they didn't get it spot-on. And deciding to limit supply so that fewer people got better service rather than many people getting rubbish service seems to have quite a consumer-focussed feel to it. They didn't just take everyone's money and not deliver, they concentrated on ensuring that those who signed up early could get full-time sensor coverage if they wanted it.

But for the rest of us, the weeks turned into months... and still we waited.

Until now.

As of last week they have begun to issue emails to people who signed up on the website. They are doing this on a 'first come first served' basis, so those who asked to be told when Libre was available to new customers in October/November 2014 will be hearing first.

Of course they will have to weed out a bunch of dead results from those expressions of interest. People who have changed their minds and so on - so if you recive an email you will need to act on it pretty promptly.

According to what I've been told by Abbott, it works like this:

• People will receive an email alert which (I think!) outlines the process
• People then recive a second email which gives them a relatively short window of opportunity to respond
• They then need to sign up as a new customer
• You also need to place an initial order to activate your account (minimum of one sensor approx £50)
• Thereafter a maximum of 2 sensors can be ordered every 14 days

Looking forward to receiving my email :)

Update: Hurrah! No more waiting list!

Abbott Freestyle Libre results vs BG meter - Review part 2

Last day of 2nd sensor. Complete with crazy-flat overnight graph.

In this update to my initial review of the Abbott Freestyle Libre I wanted to share my experience of what it was like to use and also to provide the promised comparison with results from my regular fingerstick meter (the Contour Next Link USB). If you have been living in a cave and have no idea what I'm on about you can get an introduction to the Libre here.

It is probably worth pointing out at the outset that the Libre WILL NOT give you identical readings to your BG meter all the time. It just won't. They are not even measuring the same things. If that's what you want the Libre to do, you can pretty much stop looking, because it's not going to happen - not with the Libre and not with *any* technology that measures glucose in interstitial fluid and then converts that into an estimate of plasma glucose values (so all current CGM options). More on that later. But first - what is the Abbott Freestyle Libre like to use?

Do the sensors come unstuck?
I found the Libre to be extremely comfortable and unobtrusive to wear and both sensors stayed firmly stuck for the full 14 days. I was almost never aware of the sensor being there, with the exception of one or two times when I leant on it or absent mindedly scratched near it (having forgotten it was there). I did deliberately try to remember it when towelling off after showering to make sure I didn't accidentally dislodge it, but apart from that I barely gave it a second thought. There was very little in the way of itchiness for me and at the end of 14 days the sensor removed to reveal, well... nothing very much. Insertion of the second sensor was as painless as the first. I have seen some comment online where people have found that sensors came loose after just a few days, but that certainly didn't happen to me. With infusion sets I have found that the adhesive seems to need 12-24 hours to get up to full strength. I suspect it is the same for the Libre sensors. If it gets loosened early on you may need to over-tape it with Opsite Flexifix, Tegaderm or something similar. There's not a lot of 'edge' on the sensors and I can see the possibility of the sensor getting 'levered off' if knocked in just slightly the wrong direction.

I wonder what my levels are now?
I think this picture sums up my experience of living with the Libre for 28 days. Since I started attempting to *actively* manage my blood glucose levels four or five years ago I spend quite a lot of time wondering what is going on between my BG checks. I have never really known how often this happened until now - but the Libre released me from any monitoring constraints. So there you go. An average (average!) of 31 checks a day. Something like once every 30 minutes during waking hours. I had expected that my frequency would drop off after the initial excitement, but I remained fairly consistent through the full life of the sensors - checking more frequently when levels were changing more rapidly and leaving hours between checks at times in the day where things are generally more stable. The inconvenience and discomfort of 'traditional' punctured-finger-and-strip-fiddling monitoring means I would never check this often via a BG meter, but for 28 days whenever I wondered what my levels were, I found out. It is easy to underestimate how much of a transformation this is. Any time. Every time. All the time. I could know what my levels were *and* what they had been over the last 8 hours. There was no longer any reason not to look. No 'avoiding' the numbers (whatever they might be!) in between my 'normal' testing routine. Rather than feeling swamped and judged by data I felt completely liberated.

Basal test every day
In my previous post I mentioned how amazing it was to suddenly be able to see what had happened overnight every morning. Overnight basal tests are - as everyone who has undertaken them will know - a real chore. Waking every couple of hours to check blood glucose via fingerstick is a very effective management technique - but it's no fun. But look at what happened when I had 28 consecutive basal tests - the result is at the very top of this post. I couldn't help but tinker with my overnight basal profile gradually moving it from a bit wobbly, to ridiculously level (at least for a short while!). Seeing the patterns every day meant it was easy to spot the general trends and ignore the one-offs. And I made alterations to the 'shape' of my overnight pattern that I would *not* have made without those data.

New technique
After I had been living with the Libre for around 7 days I noticed that I had added a whole new technique to my management armoury. The preventative TBR (temporary basal rate). I've regularly used them since I started with Artoo to cover activity and other things, but this was slightly different. Because of the constant availability of data and the trend arrow that accompanies each check, I found myself setting short sharp TBRs - perhaps 50% for 30 minutes or an hour - to head off an impending dip in glucose levels. I was slightly surprised to realise that the 'level' trend arrow on the Libre doesn't actually mean level as such. It just means not rising/falling fast or very fast. In the first week on sensors I ignored a lowish level because of the 'flat' arrow only to dip below 4.0mmol/L an hour or so later. By using preventative TBRs for flat or more accurately reading-flat-but-slightly-falling readings that were just 'a bit near the edge' I managed to avoid several low level hypos and without bouncing up into double figures. Similarly, micro-boluses of small fractions of units when levels were high-ish (but not yet out of range) allowed me to be bolder in preventing BG drift. WIN!

Data analysis
I really like the simple, clear overview screens on the Libre. They might be a bit simplistic for some, but by dividing the day into four chunks and averaging 7, 14, 30 and 90 days of results in those sections I found it very easy to spot patterns and filter out the ebb and flow of 'diabetes randomness'. I particularly liked the 'Daily Patterns' graph which only appears after 5 days of results are stored and offers an average of daily results along with a 90th and 10th centile shaded area (it's a simplified version of the Ambulatory Glucose Profile graph - see image). It becomes very easy to see which periods in the day are providing the most challenges. You get a similar view (but with many more options, and helpful traffic lights) when you connect the Libre to your PC (or Mac - hooorah!). The Libre software niftily allows you to create smart PDF reports recording all sorts of averages, graphs, low glucose events and mealtime patterns which can really help to understand what has been going on. Additionally any mealtime notes and/or carbs and other details that you may have chosen to record on the libre are transferred for review too. If you have a particular penchant for number crunching you can also download up to 90 days results and details as a 'tab separated' txt file ideal for import into your spreadsheet package of choice. Look for the 'File' menu at the top of the screen, and choose 'Export Data'.

The end result of my 28 days? I had some of my BEST results all year. Lower post-meal spikes, fewer lows, fewer highs. Not bad Abbott! Thank you very much Freestyle Libre.

Ready to insert second Libre sensor

Libre results vs BG meter
Well... this is all very well you say. But if the results the Libre is providing are complete garbage, then it doesn't matter a hoot how nifty the downloaded PDF reports might be.

So how reliable were the results?

It's a good question. And not necessarily an easy one.

As I suggested earlier the Libre is reading glucose levels in interstitial fluid (via factory calibrated sensors) and then interpreting those through an algorithm to present values intended to reflect plasma glucose levels. That's a whole lot of steps in between what the Libre reads and the results you receive. And much as I realise a lot of work will have gone into ensuring that those results will be mostly OK for most people most of the time - clearly it is likely or at least possible that some variation will occur. Not least because the glucose values in interstitial fluid will 'lag' behind blood glucose values (typically 10-15 minutes, though the Libre aims for 5). Things are complicated further by the +/-20% variability which is allowed between BG fingerstick strips (though again these days meters tend to perform more like +/-5% or 10% most of the time).

What matters more to me is not whether results are identical all the time - it is more whether the results I get are useful. Whether any variation is modest enough that the readings, trends and analysis help me manage my diabetes better.

In order to understand what I was getting from the Libre I tested both sensors against my standard BG fingerstick testing routine. This is usually between 6 and 10 fingerstick tests a day, including premeal and post-meal tests as well as those around driving, exercise and activity. Whenever I took a BG fingerstick test on my 'normal' meter (the Contour Next Link USB that works with my pump) I cross-checked with the Libre. At the end of each sensor I then downloaded all the data and compared it on a spreadsheet to see what (if any) differences there had been. I do not for a minute pretend that this is a scrupulously scientific test - or that the results here might apply to anyone else. I took these comparisons purely for my own interest, and share them here in case others find them useful.

Here's a summary table from the first sensor - there were 94 pairs of results (BG meter vs Libre) over the 14 days:

Sensor 1

	BG meter	Libre	Avg +/- % (against BG meter reading)	Avg +/- mmol/L (against BG meter reading)
Average	7.8mmol/L	7.4mmol/L	10.1%	0.7
SD	2.8	3.0	8.9%	0.6
Distribution of readings
Number of readings where Libre higher			18	19%
Number of readings where Libre lower			70	75%
Number of readings equal			6	6%
Number of readings within 0.5mmol/L			43	46%

I don't know about you - but that looks pretty darned good to me. Yes, in amongst that there were some readings which were substantially different. A handful of times around 40% different from the BG meter - to put that into context one was a 4.4mmol/L that read as a 6.1mmol/L - one needs watching the other doesn't. There were also results where the Libre read hypo, but my BG meter confirmed I was in the 5's.

But the vast majority of the data feed is well within usable limits for me. The SD line gives a useful estimate of the range of most of the results. So from an average of 0.7mmol/L difference the most of the results were somewhere between 0.1 and 1.3mmol/L out.

You will notice that in most cases (but not always) the Libre was reading lower than my BG meter - with the result that overall the average of all results for the Libre comes out at 0.4mmol/L lower than my Contour Next Link, but with a slightly wider range (SD of 3.0 vs 2.8). Amazingly though, almost half the time the Libre was reading within 0.5mmol/L of my BG meter - and don't forget that at least some of the differences in readings could be down to the 5-10 minute 'lag' between BGs and interstitial glucose - especially if BGs were moving fairly rapidly at the time.

What I think this means for me in practical terms is that if I was running off results from the Libre more or less full time, with only a few cross-checked results where BG was moving rapidly or if things 'didn't feel right' I would most likely run a little higher most of the time. This would probably do wonders for my avoidance of hypos, but I suppose it may also have a small knock-on effect on my HbA1c.

But.

Isn't there always a 'but'?!

Things get a little more interesting when I switched to Sensor 2. As soon as that sensor started reading the graph 'jumped' down the screen. If the first sensor had tended to read a little lower, this sensor was taking that to new levels. Now Abbott do suggest that the Libre sensors may not read quite so accurately on day 1, but that days 2-14 should be relatively steady. Even on the second day though readings on the Libre were consistently 2mmol/L or more lower. And since there is no calibration option there was absolutely nothing I could do about it.

Here are the results for the first 5 days of that sensor:

Sensor 2 - days 1-5

	BG meter	Libre	Avg +/- % (against BG meter reading)	Avg +/- mmol/L (against BG meter reading)
Average	7.1mmol/L	5.4mmol/L	26.2%	1.7
SD	2.3	2.3	13.7%	0.8
Distribution of readings
Number of readings where Libre higher			1	2%
Number of readings where Libre lower			43	98%
Number of readings equal			0	0%
Number of readings 1.5mmol/L or more out			26	59%

You can see the difference in performance for yourself - over twice as far out. Suddenly almost 60% of the time the readings were 1.5mmol/l or more different and almost always lower. I had a few overnight traces that looked as it I'd been on the verge of a hypoglycaemic coma all night - when in reality I'd just been bobbling along in the low 5's (I know because I panicked and checked). On several occasions the Libre just reported 'LO' - with (allegedly) a level too low for it to record.

After several days of 'waiting to see' I contacted the lovely folks at the Abbott helpline who ran through a few checks to make sure I had the sensor in the right place and generally could tell my Libre from my elbow. I had been given a handful of Freestyle Optium Neo strips with my pack of goodies and the helpline person suggested I tried cross-checking against the Libre's inbuilt BG meter rather than some other technology (interestingly these strips also read a smidge lower than my ususal meter). As it turns out the reading on that occasion was pretty close (typical!) so I left it at that and wished I'd called them earlier.

The plot thickens
A couple of days later I had a call from Fiona who I'd met at the Libre pre-launch meeting called to say that a software glitch had been discovered (and fixed) in some of the very early sensors which was causing some interruptions in data and other concerns. I related the issues I'd been having with the second sensor and while they didn't seem to exactly fit with the software glitch described, Fiona offered to replace the second sensor.

In the meantime, and certainly into the second week, the second sensor seemed to be settling down considerably and behaving much more like the first. Here are the results averaged from days 6 to 14:

Sensor 2 - days 6 to 14

	BG meter	Libre	Avg +/- % (against BG meter reading)	Avg +/- mmol/L (against BG meter reading)
Average	6.9mmol/L	6.5mmol/L	11.7%	0.8
SD	2.2	2.1	10.2%	0.6
Distribution of readings
Number of readings where Libre higher			15	27%
Number of readings where Libre lower			38	69%
Number of readings equal			2	4%
Number of readings within 0.5mmol/L			21	38%

Not exactly back to the performance of the first sensor, but pretty darned close. Of course it did take those 5 days to settle. And if I'd been stumping up hard-earned cash for that sensor I suspect I might have been quite miffed that data from 36% of the life of the sensor was fairly useless to me.

I would have expected that a relatively consistent error would have still yielded useful 'trend' data - but in reality I found it very difficult to detach myself from the uneasy feeling that 'red' (hypo) results gave. However much I knew, or suspected, that my *actual* BG level was 1.5-2.5 points higher it was impossible for me to use the information in the same way when the margin of error was that great.

So in the end I am left with one spare sensor yet to use (which I plan to put into action around Christmas time) and just a very slight sense of unease as to what future sensor(s) might bring. When it worked at the 10% MARD that Abbott promise in the marketing literature I found it an incredibly powerful tool. If it were available on prescription and performed consistently like that I would be banging the table and asking to swap my (fairly generous) fingerstick allowance for Libre sensors - topping up with as many strips as I needed on top of that out of my own pocket.

But.

If other sensors only perform to the accuracy of the first 5 days of Sensor 2 then it's a whole different ball game. I wonder if Abbott may come to regret their decision to go for factory calibration. From a user's perspective I have already seen several posts from people who would find it very useful to have a 'manual override' setting where you could offset Libre readings which are consistently out to bring them more in line with our own fingersticks.

All in all I love the Libre and I am really hoping that future sensors live up to overall positive experience I have had so far.

Now that the online shop has opened I'd be interested to hear your experiences if you have used the Libre yourself.

Final verdict: 4/5.

Update: Freestyle Libre now licensed for use in under-18s

Diabetes Week - Artificial Pancreas Project

It's Diabetes Week in the UK this week and after my rather forlorn post about the apparent disappearance of C8 medisensors non-invasive CGM last week I was pleased to read this little update on the Artificial Pancreas Project (APP) from Diabetes UK today.

It's still reasonably early days, and to my mind we are still quite a way off a 'real' management solution, but step by step people are cautiously being allowed to hand over the reins overnight to an automated system in their own home rather than under strict lab conditions with technicians standing by the bedside clutching Lucozade and NovoPens.

For those of you who have *no* idea what I am going on about, the Artificial Pancreas Project is seeking to 'close the loop' between two clever bits of diabetes kit. A Continuous Glucose Monitor (CGM) that can measure glucose levels and an insulin pump that can provide varying doses of insulin. In fact most people who happen to see my pump tend to assume that we are there already, and assume that a pump will just somehow 'know' how much insulin is needed and provide it automatically. Sadly it's not quite that easy, and while an insulin pump is a brilliant therapy option it does still require a fair amount of effort, guesswork and to be honest more than a little luck in balancing all of the hundreds of variables involved in day-to-day BG tomfoolery.

Part of the problem with the APP of course is that the technologies involved are improving, but still rather less than perfect. Continuous Glucose Monitors make an estimate of blood glucose levels based on glucose concentration in interstitial fluid (the stuff sloshing around between cells in tissue). This tends to lag a bit behind actual BG values, and those lucky enough to have access to CGM will know that what you are really getting is 'trend' information rather than the accuracy* of blood-based fingersticks. CGM manuals/marketing are usually pretty clear that any doses/corrections made should be done after confirming results with a fingerstick test. But the closed loop system needs to use this very same stream of trend information in order to make dosing decisions.

Currently the human trials of the APP are showing relatively promising results for looking after things overnight. To know that you had a smart system carefully tweaking your levels while you slumbered would be fantastic, but of course a full Artificial Pancreas would have to go much further and tackle the thorny issue of mealtimes. Personally I think we are a looooong way off that. For one thing current 'rapid' analogue insulins are hopelessly inadequate for the task. They take far too long to get going (1 hour for corrections to start taking effect anyone?) and act over far too long a time period to give a bunch of electronics, however smart, the ability to take over entirely.

What I would hope for instead is a commercially viable 'smart pump' which combines much of the effort and user knowledge/experience that currently goes into effective pump use, but with automated AP trickery to take the edges off the errors and irritations of daily pancreas impersonation. A system whereby you would bolus for meals, set TBRs for activity and generally do the basics, but the pump would be constantly monitoring how things were going and have the ability to tweak things and make corrections to keep things on a more even keel.

Now that really would be something.




* It should be noted, of course, that fingerstick BG tests in themselves are not particularly accurate and only really serve as a general guide as to what is going on.

Has the light gone out on C8 Medisensors optical CGM?

Someone left a comment earlier today asking if I knew any more information about the C8 Medisensors non-invasive CGM, which was given CE mark approval late last year. Some of you may remember me getting quite excited about it after having seen the device in action.

At that stage, the general expectation seemed to be a European launch in the Spring of this year. In January I got wind that the launch had been put back slightly to allow for 'further enhancements' to be made prior to the launch in mid-2013.

I've had a little look around the internet, but all I can find are reports/stories from late last year. Trying to look up the C8 folks I met via LinkedIn suggests that they stopped working for the company in January this year. It seems that at about the same time John Kaiser took over reins at the company - so what happened then?

With an increasing sense of doom, I realised that their website seems to have gone offline in the past few months too.

To be honest, I'm gutted.

Just wondering if anyone knows what the story is? I really believe that their non-invasive CGM, if it lived up to the promise shown, genuinely had the ability to completely change the landscape of diabetes care across Europe, and CGM pricing/availability in particular. £2000 for 4 years, rather than £3000-£4000 every year would put self-funded CGM within the grasp of many more people in the UK. A currently frustrated and untapped market.

I can't have been the only one waiting for lauch with one hand reaching for my wallet.

Anyone from C8 Medisensors out there?

Our Lives, Quantified: My Adventures at Stanford Medicine X

This is the second of a series of blog posts in which I will recount my adventures at Stanford's Medicine X, Conference: An experience which has changed my life, and I will not soon forget. :-) 

Much of my first day at Stanford MedicineX left me feeling like I didn't belong there. I wasn't an innovator, or a CEO of anything (except, perhaps, CEO of my type 2 diabetes), and I wasn't quite sure what my voice was going to be at this conference. I wasn't even close friends with any of the other diabetes advocates who were attending. I felt, well, maybe I was a bit bold in having applied for this conference. But by the time our orientation dinner came around, I became a bit more confident in myself.

Carb centered food everywhere.
How apropos. 

Dinner was had at the quirky, randomly decorated Buca di Bepo restaurant (where you have to cut through the kitchen to get to the dining room), and there I found some comfort. Many health advocates of all walks of life, with all sorts of conditions, all in my same spot. Some with a few more dollars than I, some with fancy positions; some with just their blog. All just like me. People, passionately believing in raising patient awareness, having a friendly dinner and conversations of where they'd been on their various health journeys.

Things were going to be alright. I could do this, I thought. The twitter voices of the many I had met, now echoed into my reality. The voices of those surviving and thriving with breast cancer, rare diseases, heart conditions, liver transplants, rheumatoid arthritis, asthma, Crohn's disease, and of course... diabetes, among many others. Stanford's Med X was going to be patient centered, and we were going to take front row seats into a whirlwind of personal stories, and imaginative ways in which silicon valley wants to make an impact.

Day 1: The Self Tracking Symposium

"The best way to anticipate the future is to fully understand the present ...  the best way to design useful tools is to notice and respect what people are already juggling in their lives." -- Susannah Fox, Pew Internet & American Life Project, on the future of self tracking.

Pretty sure this app's not
going to help anyone, though.

I'm no stranger to self tracking. There's self tracking everywhere. Track your weight, track your heart rate during exercise, track your laps, track your steps, track your BMI, track your waist circumference, track your period, track your basal temp, track your anything, and everything. There are even many apps and things out there to help patients track these things, as well as their glucose levels, or their insulin and medication usage. MedX discussed several of those apps during various startup and innovation segments. Those can be useful, in their own level... and some will be so revolutionary, that they will no doubt, forever change the ease of use of many of our medical services, and ideally, save us a lot of money as a whole (patient, industry, nation, etc.)

But what I wasn't aware of... was that the science community was on to us. On to us patients who actually self track for something more meaningful than this. Some of us patients self track because we are our OWN science experiments... because clinicians have stopped paying attention to us, or acknowledging our conditions. Because we need meaningful ways to learn, and track patterns, and self adjust for the daily grind of managing cumbersome chronic health conditions. Because those things are never found in textbooks, and are seldom ever discussed by medical professionals. Yes, some of us self track because we want to live another day, month, year, or decade... and because we want to be heard by our medical team -- and we need a voice, and we need ammunition. We need co-operation. We need acknowledgement. Sometimes, we may even need a diagnosis.


So, meet Allan Bailey. Allan Bailey is one of the self trackers. One of us. There were other self trackers, with very impressive stories to be told... but Allan Bailey has been living with type 2 diabetes for the last 27 years (onset at age 18), so I find myself a bit biased to bring him up. Allan is one who seriously took matters into his own hands... and paid for it big time. Yes, and he paid for it to the tune of around $2K. You see, Allan got pretty tired of being given the runaround as to why his blood sugars were always so all over the place... he was told his control was 'okay' and kept being treated by conventional medical standards, but Allan was not satisfied. Allan was already living with heart complications, and four stents in one vein. So... Allan bought himself a CGMs (a continuous glucose monitoring system), to really help him learn why his blood sugars were all over the place. I'm really not sure how he managed to arm wrestle his clinician into prescribing him this device, but Allan had to pay for it out of pocket, in full. Of course, it didn't take long for him to see who the real culprits in raising his blood glucose were: breads, grains, etc. Carbs. Allan never imagined that his CGM would turn into this instantaneous feedback loop for what he ate, nor that it would turn into a behavior modification device that would lead him to euglycemia, and weight loss. Doctors never care for prescribing CGMs to persons with type 2 diabetes -- usually only to those living with type 1 diabetes, particularly because it has alarm systems to help deal with potentially dangerous low blood sugar levels, and because of how costly it is. (Nevermind that the cost of complications from uncontrolled diabetes far outweighs a $2K device, and it's supplies.) Allan now has an A1c of 5.1%, has greatly improved his health, and reduced his medications.

Now, as wonderful, encouraging, and brave as Allan's story is... it makes me angry. Very angry. Can you imagine why? Wait for it...

WHY THE HELL WOULD A MEDICAL TEAM NOT EXPLAIN TO THEIR PATIENT THAT THE BIGGEST REASON OUR GLUCOSE LEVELS RISE IS BECAUSE OF OUR CARBOHYDRATE CONSUMPTION??????????? WHY DOES SOMEONE NEED TO SPEND THOUSANDS OF DOLLARS OF THEIR OWN HARD EARNED MONEY TO FIGURE OUT THAT BREAD AND GRAINS, AND PASTA ARE LIKE POTENTIAL KRYPTONITE TO A DIABETIC? WHYYYYYYYYYYYY????????? HADN'T ANYONE EVER HEARD OF COUNTING CARBOHYDRATES, AND MEASURING PRE AND POST PRANDIAL RESPONSE? YOU CAN DO THAT, AND PLOT YOUR OWN BELL CURVE WITHOUT THE NEED OF A FANCY $2K DEVICE!

This, of course... is not Allan's fault in any way. Allan was a creative person, and did what he HAD to do... and is now very healthy for it. All the power to him.

My story could have well been Allan's. Except that I ate food, noted what I ate, tested every 30 minutes, spent a heck of a lot of money on test strips (even discounted ones) as well as relying on the kindness of strangers for them, and quantified this information on a spreadsheet. It didn't take long for me to bring a 10.5% A1c to 5.3%, and it has remained below 6% ever since my diagnosis. But, like Allan, I was given a big runaround for a while... When I was diagnosed, my clinician initially refused to accept I had diabetes of any kind, even though I had such a high A1c and had multiple fasting blood glucose tests well above 200 mg/dL. And when she did concede I had a problem, she merely said "I'll google the ADA website, and tell you what you need to do." HECK, I CAN DO THAT, MYSELF! Why was I wasting my precious time in her office, for that?!?

I'd love to have a CGMs, because who doesn't love to see instant graphs and things... and I am SURE that it helps a lot with compliance (and yes, it probably adds to guilt, too, when we fail.) But it's sad that persons with type 2 diabetes routinely get denied useful, powerful, quantitative technology... and this denial is not limited to the CGMs. Many patients are denied an adequate numbers of testing strips, or even a meter at all! But what good would these tools do a person with type 2 diabetes if what they are denied is the most important thing of all... KNOWLEDGE?

. . . 

At the previous dinner, when meeting several of the other "ePatients" attending Medicine X, I had a few, sort of incredulous questions as to the state of type 2 diabetes care... and the adequacy of that care, and education for the patient. What about the ADA, I was asked? Yes... what about it? In the words of Amy Tendrich, "Patient advocacy groups are not really patient advocacy groups."

I really hope that Allan's story was able to bring even a snippet of acknowledgement into our reality as persons with type 2 diabetes, the reality and importance of self tracking, and the need for patient inspired/centered care and technology. I know that I was FLOORED to see a different take on the usual 'just diet and exercise' testimony.

C8 MediSensors - A bright future for CGMs?

Some months ago I was made aware of a new piece of diabetes techno-gubbins in the pipeline which sounded really interesting. Any poor souls who have read these ramblings before will probably already know my interest in continuous glucose monitors (CGMs). So I was delighted to be invited by the lovely Andrew to a little round-table chinwag with various other diabetes bloggers, campaigners, movers and shakers along with a couple of people from C8 MediSensors who have developed an entirely new approach to CGM which has the potential to be a complete game-changer. A non-invasive, optical CGM. It is currently classed as an 'investigational device', so it's available for use in clinical trials, but not yet available for sale anywhere in the world.

In proper 'disclosure' style I'll mention at this point that my train fare was covered, they laid on some tasty sandwiches and I was offered a modest amount to cover attending the day. I wasn't asked or paid to write anything about it, but I wasn't forbidden from doing so either and as I say - this is already a proposition that interests me (and I suspect, some of you) very much.

What C8 MediSensors hoped to gain, I think, was some end-user input for the potential UK market. The device is not yet available anywhere (they hope to have European CE mark approval by the end of the year and plan to launch in the UK and Europe first). This wasn't a marketing push, or a sales pitch, not yet anyway - this was much more of a two-way dialogue. Picking our collective brains about what we thought would be important to UK punters, how well understood we thought the concept of CGM was in the UK. What potential attributes of app and interface we felt would be welcome and/or irrelevant.

What on earth are you talking about?
The device being developed is one of those rare things. A real first. It's a non-invasive continuous glucose monitor (nCGM). It measures glucose concentration not with an inserted sensor beneath the skin, but with a small beam of light. Let me say that again. No sensors. No sensor stabbiness every 3-7 days. No sensor cost. No consumables at all of any note. As someone who has looked into the challenging financial implications of self-funding a CGM in the UK you can see why this would attract my attention.

Essentially the nCGM is the world's smallest Raman spectrometer. Apparently the initial 'proof of concept' device was about the size of a sideboard, but you'll be pleased to hear that they have managed some ingenious Wayne Szalinski style miniaturisation since then and the current device and rechargeable battery are each roughly matchbox-sized and together weigh a little more than an iPhone. Not exactly nano-technology, but certainly viable. If you are interested in a bit more nitty gritty on the device itself we were shown a short video which shows the CGM in use.

There are still some wrinkles to consider of course. The 'belt' that holds the device against you is not the most beautiful fashion accessory you could imagine. You can't immerse the device in water. You can't really use it while running, leaping and turning somersaults (the light sensor needs gentle but consistent contact with the skin to take its readings every 6 minutes and might complain if it gets jiggled about a lot). There are even 'light screen'/dark shirt precautions that might need to be made if travelling alternately from bright sunshine to deep shadow since light can 'leak' horizontally under the skin. Currently the device is intended/tested for over 18s only, though young people and other user groups are certainly being considered for the future when research data/regulatory approval permits. Data display is currently only available via an Android smartphone, though an iPhone version is on the cards.

Crucially, with this CGM you just put it on and it begins collecting data within minutes. If you want a break, even for just a few hours, you can just take the whole thing off for a short while. It's still a CGM of course, so it's more 'trend' information than definitive BG levels and occasional fingersticks will still be part of the picture, but if you've looked into CGM before you'll know that already. Interestingly, the plan is to launch with a 30-day money back scheme allowing users to try it for themselves before they commit to permanent ownership.

I came away from the meeting very excited. After 8 years of development, and many clinical trials they have data that shows the C8 MediSensors Monitor to give results comparable in accuracy to 'traditional' CGMs, but without the ongoing sensor cost. In fact the suggested price point of the device ($4,000 or roughly £2,500 at the time of writing) is somewhat cheaper than one year's worth of full-time sensors, theoretically putting it within reach of many more people than can currently self-fund. In a clinic environment I would imagine this is a device that makes perfect sense. How many CGMs stay on clinic shelves, I wonder, for want of sensors to offer patients?

Encouragingly C8 MediSensors also seemed keen to build a relationship with users, foster something of a user community. Founded by a parent of a T1 child and his two college room-mates, they seem to have something of a patient's eye-view mentality. Essentially wanting to engage not just with Healthcare Professionals, but with the Diabetes Online Community. With us as end-users.

It will be very interesting to see what happens next. Whether CE approval is forthcoming, and quite how the launched device performs in the wild.

Hold on to you hats. This could completely change the landscape.

EDIT: C8 Medisensors announced that they had received CE Mark approval on 25th October 2012. Things seem to be getting a little more interesting!

UPDATE: Has the light gone out on C8 Medisensors optical CGM?

The diabetic half hour

Just having to rattle this one down. I've got several other 'proper' posts jostling in my head, but this one has just emerged and rudely pushed its way to the front...

Is it just me or do many other diabetics seem to spend an interminable amout of time just waiting around? I'm not talking those charming hours spent in the cosy nooks of a doctor's surgery or the peace and tranquility of a clinic waiting room - I just mean the day to day business of pretending to be a pancreas. The waits I am talking about always seem to last about 'another half an hour'.

Wake up, test BG, bolus, pour coffee. Look at watch and think, "Better wait about half an hour for that insulin to realise it's meant to be doing something useful before I take the rash action of eating something."

Lunchtime, test BG, bolus, see above...

48 minutes after lunch. Hmmmm I wonder if I guessed that dollop of whatever right. Bit early yet, better wait about half an hour before testing to allow for the dose/food to get going.

Oops, got that wrong. 9.something... If I walk to the shops that'll sort that out. Back from the shops. Wonder if that worked. Better leave it about half an hour for that sort of low-level exercise to have any effect I suppose.

Evening meal (inexplicably spared the need for a pre-meal half hour wait). Look at watch, 56 minutes since finishing. Bit early yet. Better leave it about half an hour before seeing how things are going.

Bedtime. Dual wave finished some time ago but there are still a fair few units (and some takeaway) doing their thing. Better leave it a while before turning in. There... was that long enough? Ah no... that was only 27 minutes, better leave it about another half an hour.

I'm sure if I had all those back and added them together I'd have about twice as many hours in the day! And half an hour is not quite enough time to do any one thing, but slightly too long to do nothing. It's a time period where it's easy to get distracted and forget what you were supposed to be doing (waiting to eat after bolusing is a nightmare for this).

And a lot can happen in half an hour, diabetically speaking. You can be waiting to give it long enough to check and all the while your BGs can be rocketing skyward. 30 minutes of rapid climb meaning it'll take even longer to resolve.

Case in point yesterday: I had tested to find a couple of low level dips in the morning where I'd underestimated the level of activity and not sufficiently reduced basal. In the afternoon I feared the same was happening again, but rather than testing I just topped up here and there with a sip of Lucozade or a fruit pastille. Before evening meal I was an entirely self-inflicted 12.2 (220). Not ideal. In an attempt to speed the return to better levels I left Jane washing up (sorry about that) and went for a brisk 40 minute walk. Once back I waited for things to settle (about half an hour, of course) but then found that rather than improving things I was up to a wince-inducing 24.8 (446). Frustratingly I rarely feel any symptoms with quick rises into kidney-frying territory so I had waited none-the-wiser while my liver had decided that my BG was far too high to be walking about and what I really needed was an additional surge of glucose. Great. Thanks for that.

On the other hand I had changed set just before evening meal so maybe it was nothing to do with the walk and it was just a set failure?

A full 5 unit correction administered there was nothing to do but wait and see if thigs got better or worse. Ready yet? Nope, not long enough. Another half hour should do it... (I always seem at least twice as eager for a correction to start working as it is able to start reducing BGs).

Thankfully I did come down overnight, and very smoothly too. Artoo earning back my trust with a 6.5 (117) at 2am, followed by another 6.5 (117) on waking this morning.

Yet another day when I would *love* the immediacy of feedback that a Continuous Glucose Monitor offers. Ah well, without a lottery-win (unlikely as we don't do it) that isn't going to happen with the current pricing structure.

The holy grail? HG1-c a CGM without consumables

I had a comment posted over the weekend that drew my attention to a new CGM (continuous glucose monitor) technology. It's so new that it's not even available yet, anywhere in the world, and while I suspect that the commenter ('Bob Slack') may possibly be part of the 'marketing machine' it is, nevertheless, interesting enough for me to want to post about it.

I've been banging on about CGMs for ages. As far as I can see they are perhaps THE most significant step forward in diabetes care in the past 10 years. For my money a full-time CGM would have at least as much benefit to many MDI patients as a pump. The ability to know at any given moment, not just my BG level but also the direction it is heading and the rate of change would be a complete revelation to me. Suddenly you would have three times the amount of information on which to base your decisions. Managing diabetes often feels like steering an ocean liner through a tricky maze of sand bars and reefs. Blood glucose levels can change so rapidly with food or exercise, but the insulin 'steering mechanism' we are using has a frustrating time-lag of a few hours before its effects are truly felt. Dodging highs and lows before they happen is often a case of informed guesswork based on years of experience combined with living as many days as possible the same way to try to reduce the ridiculous number of variables involved. Reducing spikes after meals can involve injecting early to give the insulin 'a bit of a head start', while simultaneously trying not to overdo it and risk a post-meal dip. Sometimes it works, quite often it doesn't.

A CGM takes a reading from 'interstitial fluid' around every 10 minutes and gives an idea of what the BG level was perhaps 10-15 minutes ago. Up till now the readings have been taken via a sensor placed under the skin. Every few days this sensor had to be replaced, and they are not cheap. Running a fulltime CGM in the UK is likely to set you back thousands of pounds a year and currently NICE does not recognise them as a stand-alone treatment method. There are only a handful of people who have managed to secure NHS funding for CGM therapy in the UK, mostly children. Either their clinical circumstances are unusual enough to swing the extra expense, or they are very very skilled and determined negotiators.

The HG1-c by C8 Medisensors is based on what appears to be completely new technology. It uses non-invasive optical measurement so that no expensive under-skin sensor is required. In theory you just strap it to you for as little or as much time as you want. Of course since it is not yet available there is no way of knowing (apart from reading the marketing promises) how well, if at all, it might actually work, how much the unit will cost and even whether it will ever be licensed for use in the EU or UK.

Still... This could be one to watch.

The shape of things to come?

Before I got all hot under the collar yesterday about that news item on the BBC website, I had meant to write a quick post following my meeting with the lovely LJ, one of the DSNs at the hospital.

I gave her a potted history of the last two years (I've not really been in contact with the DSNs much for a very long time), the improvements I been able to make and the challenges and issues I still face. We talked hypos, warning signs, fear of driving, fasting and overnight levels, gym visits and everything in between. I explained my lingering uncertainty with the whole idea of pumping which some of you will know all too well. I've been bleating on about it for years.

Essentially it comes down to this - having got as far as I can with MDI, I am at the point where I see it as a clumsy, slightly imperfect way of mimicing the action of a pancreas. Pumping, on the other hand, is an incredibly subtle, but still slightly imperfect way of mimicing a functioning pancreas.

However I am convinced that more problems would be solved than created, and the lingering doubts I have will never go away except by experience.

So...

LJ has suggested that she recommends to my consultant that I begin insulin pump therapy (I have requested a Paradigm Veo to give me the option of self-funding the CGM facility whenever I need/can afford it). If the recommendation and funding is approved it is possible I could be pumping before Christmas.

I'm unexpectedly excited about it, and if I'm honest, just a little bit scared.

Now to get hold of a copy of Pumping Insulin: Everything You Need for Success on a Smart Insulin Pump by John Walsh

Update: Look Sir, Droids!