Syringe pump rapid occlusion detection system

摘要

An apparatus and method for detecting an occlusion in a downstream fluid line of a medical pump in relation to increased pressure in the downstream fluid line between the beginning and the end of each interval of a series of intervals of operation of the pump even if one or more intervals between the first and last intervals does not reflect such an increase in pressure in the downstream fluid line.

主权项

1. A method of automatically detecting an occlusion in a downstream fluid line of a medical pumping system, the downstream fluid line being configured to carry fluid under pressure between a fluid source and a patient, the method comprising:
operating the medical pumping system to carry fluid under pressure in the downstream fluid line over a series of intervals having a first interval, a last interval, and a plurality of intervals therebetween; determining, for each of the first interval, the last interval, and at least one of the plurality of intervals therebetween (“middle interval”), a relationship between an instantaneous pressure indicative of force in the downstream fluid line at an end of the interval and an instantaneous pressure indicative of force in the downstream fluid line at a beginning of the interval; and providing an indication that an occlusion exists if (a) for each of the first interval, the last interval, and the middle interval the determined relationship departs from an expected relationship and (b) for at least a second one of the plurality of intervals (“intermediate interval”) either (i) said relationship is not determined or (ii) said relationship is determined, but said determined relationship of the intermediate interval does not depart from the expected relationship.