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Be careful, was: Re: [IP] how much to prime cannula for sils?
Careful folks ....
Metal needle infusion sets, such as the Disetronic Rapid, the Classic, or
the MiniMed Bent Needle sets *DO NOT* require priming the needle after
insertion, unlike the Silhouette, Tender, Sofset, etc. which *DO* require
priming the cannula after insertion.
With metal needle infusion sets, the needle is already filled with insulin
when you insert it - there is no "dead space" in the needle.
With Teflon based sets, such as the Tender, etc. there is "dead space" in
the cannula created when you remove the metal introducer needle. This space
must be filled with insulin after inserting the set - hence the need for
the small "priming bolus". If you don't fill the cannula by priming it, the
first bolus of .5 - 1.0 units will simply push air out of the cannula, not
BTW, when I use Tenders, I prime 1.0 units if my BG is in the normal / high
range, or .5 units if I'm in the low range (my Disetronic pump is set for
.5 unit bolus increments). My body usually doesn't understand / appreciate
precision enough to be fussy about the difference between .75, .8 or 1.0
unit when priming the cannula <g>. Sometimes I'm wrong, usually I'm correct
- it's diabetes, so sometimes it surprises me :-)
mailto:email @ redacted
Michael's dialog with Ruth went like this:
>On Fri, 31 Mar 2000, Ruth Schneider wrote:
> > WHEW!!
> > thanks michael....so why does it say 0.5 on the D page?
> > just curious...
> > ruth
> > > Per the mfg,
> > > Sofset = 0.5 u
> > > Sil/Tender/Comfort set = 0.75 u, 1 is close and commonly used
> > > 0.8 is almost exact
> > >
>I'm not sure, but I believe that 0.5 u is used for the bent needle and
>rapid sets, perhaps someone else can provide that info -- maybe from the
>package insert. The SofSet and Sil/Tender/Comfort I am sure of.
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