SENSING A STATUS OF AN INFUSER BASED ON SENSING MOTOR CONTROL AND POWER INPUT

摘要

A status of a battery operated infuser may be detected by measuring a controlled input parameter. The measurement may be used to determine a magnitude of the input parameter and a parameter of the control. For example, control of power input to a motor may be by pulse density modulation. An integral of current over time may sever as a measure of current magnitude and pulse density. The result of the integral may be used to determine the status of the injector. The status may include normal functions for example start of pumping and/or malfunctions such as occlusion or drive disengagement.

主权项

1. A method of determining a status of a battery operated drug infusing device comprising:
controlling the device based on a performance of the device; measuring an input parameter of the device, and ascertaining a status of the device dependent on both
a magnitude of said input parameter andsaid controlling.