Products > Dodgy Technology

Abbott glucose meters under recall for catching fire.

<< < (3/4) > >>

jpanhalt:
I was remotely involved in some of those home testing developments years ago.  One, Abbott did make good equipment.  I would want to review actual documents related to this matter before judging it, but have not done so.  Two, Abbott did an interesting experiment during development (personal anecdote).

First, it included internal memory but didn't tell the test group (all diabetics) about that.  Abbott simply had that group record its data and turn it in.  Almost 100% of diabetics lied, which was not unexpected (i.e., more favorable written results than actual).

Second, it told the users there was internal memory and repeated the experiment.  Result was that a large majority still lied.

Diabetes is a complicated disease, particularly for those afflicted as juveniles.

coppice:

--- Quote from: jpanhalt on June 09, 2023, 09:38:32 am ---Diabetes is a complicated disease, particularly for those afflicted as juveniles.

--- End quote ---
Its a massive and growing issue, so the device makers take it very seriously. Getting a design in for a blood glucose meter is a really nice win for a component maker. Increasing affluence in China and India in particular is driving a lot of new diabetes, meaning an ever growing market. Bad for health. Good for the electronics industry, especially MCUs.

thm_w:
A good chunk of the stuff bigclive looks at is just USB -> diode -> battery. But we are talking bottom of the barrel dollar store solar lights and crap like that. I'm not convinced yet this is as simple an issue as people claim it is.
Where are you seeing that "they can draw too much current" from a third party charger? Or is that just speculation. This is what the recall says:

"Abbott is recalling the FreeStyle Libre, Libre 14 day, and Libre 2 Flash Glucose Management Systems’ reader devices, which use rechargeable lithium-ion batteries, may get extremely hot, spark, or catch on fire if not properly stored, charged, or used with its Abbott provided USB cable and power adapter. "


Some quotes from youtube comments:
" I have a gen1 reader disassembled, but haven't looked into the charging circuit so far. The "Abbott provided charger" is just a regular 5V 550mA USB power supply though with nothing special about it. "

"The Freestyle 2 has the worst battery life you can imagine. 2 days, at most. Model 1 had over 2 weeks! And yes, because you can use blood sugar test stripes with this device, getting blood in the USB port is not that unlikely. Abbott could have used a protection flap for the USB port, they didn't. "

"My Libre 2 meter for the 14 day sensor did not come with a charger. It came with a cable to plug it into a computer."

I'll see if I can find one of these locally.

tszaboo:

--- Quote from: Psi on June 09, 2023, 05:11:42 am ---It feels like an outsourced design that was reviewed for safety by a committee of legal/regulatory/safety with no real engineers involved.
(Or engineers were consulted and then ignored with rational to make sure customer only uses 'their' charger)

--- End quote ---
My rational self would say: they didn't find a charger IC with the appropriate medical rating.
My irrational self would say: they tried to find a part on ti.com's new website, got really really angry, and said f it, then we just place a resistor instead.

coppice:

--- Quote from: tszaboo on June 09, 2023, 11:05:56 pm ---
--- Quote from: Psi on June 09, 2023, 05:11:42 am ---It feels like an outsourced design that was reviewed for safety by a committee of legal/regulatory/safety with no real engineers involved.
(Or engineers were consulted and then ignored with rational to make sure customer only uses 'their' charger)

--- End quote ---
My rational self would say: they didn't find a charger IC with the appropriate medical rating.
My irrational self would say: they tried to find a part on ti.com's new website, got really really angry, and said f it, then we just place a resistor instead.

--- End quote ---
They've made the medical rating requirements so onerous that a lot of semiconductor vendors have stopped trying to get their parts rated. I imagine this has severely reduced the options equipment designers have available to them.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod