RUCHTI, TIMOTHY L.,MARKEY, BRIAN G.,BELKIN, ANATOLY S.,KOTNIK, PAUL T.,KHAIR, MOHAMMAD M.
申请号：
EP13768125
公开号：
EP2830687A4
申请日:
2013.03.27
申请国别(地区):
EP
年份:
2016
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.
