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Re: [IPk] Which Infusion set



I have now had the definitive answer from the Minimed gurus with respect to
the possibility of the Sof-Set leaking when used with the Disetronic pump.
To paraphrase the answer - ' they don't'.

Both MiniMed and Disetronic pumps have an occlusion alarm which will detect
the build up in pressure due to an occlusion long before there is any chance
of leakage. If the alarm sensor fails, however, then the the Disetronic pump
may pump to a higher pressure than the MiniMed due to the difference in the
delivery systems. An alarm after this point depends on detecting a stalled
motor and in this the Minimed is more sensitive.

It is not a sensible to worry whether one pump has a higher pressure than
another. The pressure in the system is determined by the state of the
infusion set - as long as this is flowing freely then pressure is not an
issue. If the tubing becomes blocked then the crucial thing is to have that
detected as soon as possible. There is no benefit in thinking that a higher
pressure will 'blow out' the occlusion as this would not be helpful.

I think that's all I can say on this topic.

Ray Morrissey
----- Original Message -----
From: Ray Morrissey <email @ redacted>
To: <email @ redacted>
Sent: Tuesday, October 12, 1999 4:45 PM
Subject: Re: [IPk] Which Infusion set


> The rubber seal leaking I suppose is a possibility though I have not heard
> of it, but maybe the same argument would apply to the silhouette/tender. I
> will copy the mail to the support staff in Minimed just to check my data.
>
> Thanks
>
> Ray Morrissey
>
> ----- Original Message -----
> From: John Neale <email @ redacted>
> To: <email @ redacted>
> Sent: Tuesday, October 12, 1999 2:00 PM
> Subject: Re: [IPk] Which Infusion set
>
>
> > >John Neale has suggested that you should not use a sof-set with the
> > >Disetronic Pump. However there is actually no reason for this. We have
> > >successfully used the Sof-Set with the Disetronic Pump since they were
> > >launched. (They are also used with almost every portable infusion pump
> for a
> > >wide range of other applications). So if the Sof-Set is what you want
> then
> > >it is quite safe to use it.
> >
> > I bow to your knowledge, Ray.
> >
> > I read once on the US IP list that the problem is with the small hole
that
> > is left in the rubber membrane when you have removed the insertion
needle.
> > This hole is essentially self-sealing. But since the Disetronic pumps at
a
> > higher pressure, there is a risk that if the canula got blocked, the
> > insulin could leak out of this hole before the pressure is reached where
> > the No Delivery alarm sounds - thus preventing the alarm from being
> > triggered.
> >
> > Can anyone confirm this?
> >
> > John
> >
> > --
> > mailto:email @ redacted
> > http://www.webshowcase.net/johnneale
> >
> >
> > ----------------------------------------------------------
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>
> ----------------------------------------------------------
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