A comparison of the performance of two types of infusion device

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Abstract
The delivery performance of two types of infusion pump, the IVAC 711 series syringe driver and the IVAC 531 series drop-counter, was examined by measuring the output of 16 pumps. We found that despite careful attention to the setting up of all apparatus, the IVAC 711 series syringe drivers had a significant lag phase before output matched the set rate, and that this lag phase was more pronounced at low rates of infusion. This was not the case with the IVAC 531 series which delivered the set rate from the outset. We suggest, that when the timing and rate of an infusion of drug is important from the outset and when these types of pump are being used, that either the syringe driver pump is primed by a brief period of high rate infusion vented by a three-way tap or that a drop-counter pump is used.

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