Medtronic

What’s a container of insulin called?

Insulin is supplied in three forms of container: Vials. Usually containing 10 ml each. Pen cartridges. Usually containing 3 ml each. Novo calls these “PenFill”: that is trademarked and not appropriate for other makes. Pre-filled disposable pens. Again usually containing 3 ml each. Insulin pumps have an internal reservoir that needs to be replaced/refilled every …

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When is a 670G not a 670G?

Most people interested in insulin pumps will by now be aware of the Medtronic 670G pump (sometimes mistakenly labelled as an “artificial pancreas”). This pump is the first commercial pump with basic hybrid closed-loop functionality, and was released in the US in 2017. There has been much discussion of when the 670G will be coming …

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Pump cannulae and infusion sets: what are the differences?

Cannulae (the plural form of “cannula”) are the tubes we stick into ourselves to infuse insulin from our pumps. They’re either made of steel or flexible teflon. Some go straight in (90˚) and are available in 6 or 9 mm lengths. Some are a lot longer. Today 6 mm is a common recommendation, although longer …

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Basal increments in pumps

The features of insulin pumps differ between models, but there are many similarities and it’s usually not too hard to change to a different model. But one subtle but confronting difference can be the way we can set a basal profile of insulin delivery. However adjusting to a new method is usually not a hard …

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AAA batteries for insulin pumps – updated data

I’ve previously written a fairly detailed analysis of the performance of various AAA batteries in Medtronic insulin pumps being used in a closed-loop setup (the frequent radio traffic shortens the battery life significantly from when the pump is operating in standalone mode). In the 8 weeks since that post I have continued to collect data …

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AAA batteries for insulin pumps – Part 2

Recently I posted an analysis of the behaviour of various AAA batteries in my insulin pump. Second instances of some battery models have been completed, so we get a chance to review the initial conclusions. Here’s the graph with just the duplicated battery types: That’s still quite busy, so next we’ll look at just the …

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Which pump is that?

Here’s a Medtronic 640G sitting on top of the box it came in. But why is the photo on the box of a different pump? Notice the reservoir cap in the upper left of each. The pump on the left has a longer black extrusion sticking out of the pump, whereas the one on the right …

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