Technical Specs Part 3

Troubleshooting Pump System Under-delivery
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Backflow conditions are characterized by increases in daily programmed
insulin usage, difficulty in maintaining euglycemia, increasingly negative
refill accuracy and sometimes hyperglycemia. Conform a backflow con-
dition by performing the Stroke Volume Measurement Procedure. Then
rinse the Pump System with NaOH solution to dissolve insulin deposits,
following the Pump Rinse Procedure outlined in Appendix E.
Under-delivery caused by catheter occlusion
Under-delivery caused by Catheter occlusion can occur either abruptly or
gradually. The insulin usage and clinical symptoms are identical to those
of Pump under-delivery. Confirm a Catheter occlusion condition by per-
forming a Pressure Measurement Procedure. Then perform the following
procedures to clear the occlusion:
First, flush the Catheter by using the Side Port Catheter Flush
Procedure outlined in Appendix F.
If the Flush Procedure is unsuccessful, replace the Catheter.
Catheter replacement surgery should be performed in a manner similar to
the initial Pump System implantation. PPC initialization will not be nec-
essary. However, after the Catheter replacement, Pump function and
delivery verifications must be performed.
Dmp9196021-011_c.book Page 132 Wednesday, April 3, 2002 5:06 PM