[Previous Months][Date Index][Thread Index][Join - Register][Login]
[Message Prev][Message Next][Thread Prev][Thread Next]
[IP] Avoiding Bubbles (was "resouvir [reservoir] question")
Since I've been on the pump, I've had no problems with bubbles. Here's what
I do, but of course, as in all
things diabetic, YMMV:
First of all, bubbles aren't magic. They're present because either they
were _pushed_ into the tubing (from trapped air) or _pulled_ into the
tubing (from a loose fitting).
1. Before filling the reservoir, pull (not all the way) and pull and push
on the plunger a couple of times to distribute the lubricant already
inside. This will reduce the possibility of air leaks around the plunger
while filling the reservoir in step 4.
2. Before filling the reservoir, twist the filling needle with the plastic
cover on so it's *tight*. This will minimize air leaks through the needle
in step 4.
3. Withdraw the plunger to fill the reservoir with air and then inject this
air into the insulin bottle. If this step is omitted, the insulin bottle
will be under a vacuum and air will be sucked into the reservoir from
around the plunger in the next step.
4. Fill the reservoir from the insulin bottle with the needle pointed *up*
so that air floats to the top of the reservoir. When the reservoir is full,
withdraw it from the insulin bottle. Holding the needle *up*, tap sharply
several times on the reservoir so that the air around the plunger is
knocked to the top. Then, hold the reservoir up to a bright light and push
the air (and any insulin trapped between air pockets) out of the reservoir.
Stop pushing on the plunger when insulin starts to flow out the needle and
no bubbles are left in the reservoir.
This step is NOT included in the "Instruction for Use" of the Minimed 3.0
ml Reservoir (REF MMT-103). Instead, Mimimed advises you to get rid of the
air after you connect the infusion set (step 6). However, it's much easier
to manipulate the reservoir without the infusion set attached and I haven't
yet filled a reservoir without seeing air at this point. IMHO, this is the
single most important step listed for eliminating bubbles.
5. Holding the reservoir with the luer connection *up*, unscrew the (tight)
needle with the plastic cover, and attach the new infusion set connector.
Screw it on *tight*.
6. Holding the reservoir with the luer connection *up*, push on the plunger
until the insulin comes out the needle. Once insulin starts coming out,
there should be no bubbles visible anywhere at this point. If you see
bubbles, get rid of them before going any further. Try to figure out how
they got there. THERE IS A REASON.
7. Insert the plunger into the pump and (gently) push the driver arms
against the plunger to minimize the priming quantity.
8. Prime the pump. 5 units should be much more than sufficient (2 will
usually do). If insulin doesn't appear at the needle tip after 5 units,
look for leaks and bubbles and try to figure out what went wrong. THERE IS
At 19:29 5/22/00 -0700, you wrote:
>I had a really hard time getting all the air bubbles out of the
>syringe. I've tried using pens, and other things trying to get rid of the air
>bubbles, and it seems not to work. Anyone have any ideas, suggestions,
for HELP or to subscribe/unsubscribe, contact: HELP@insulin-pumpers.org
send a DONATION http://www.Insulin-Pumpers.org/donate.shtml