Timothy L. Ruchti,Brian G. Markey,Anatoly S. Belkin,Paul T. Kotnik,Mohammad M. Khair
申请号：
US13851207
公开号：
US09995611B2
申请日:
2013.03.27
申请国别(地区):
US
年份:
2018
代理人:
摘要：
Various systems and methods for detecting air in a chamber of an infusion system are disclosed. In one embodiment, a determination is made that air is contained in the chamber on the basis of a change in the average force exerted against the plunger utilizing a derivative spike for event detection and a systematic reduction in the average force to confirm the nature of the change. In another embodiment, a determination is made that the chamber contains air when a difference between the current force profile and a baseline force profile crosses a threshold. In an additional embodiment, a force profile is classified as being an air force profile or a liquid force profile based on extracted features of the force profile.
