David Tseng Ho Hung,David Pih,Purushottam Amarnath Patil,John Michael Wyatt,Vincent James DeFrank
申请号：
US14019745
公开号：
US20140074030A1
申请日:
2013.09.06
申请国别(地区):
US
年份:
2014
代理人:
摘要：
A pump system and method of detecting/alerting for a possible unintended free flow condition in an administration set includes the steps of a) sampling force signals from a force sensor of the pump at a predetermined frequency b) storing each of the sampled forces signal in a N-point circular buffer, where N is an integer greater than two c) calculating a derivative dF/dt based on the two most recent samples d) repeating step c) and when the most recently calculated derivative dF/dt exceeds a first predetermined threshold, then calculating a N-point moving average of the derivatives dF/dt and f) when the N-point moving average exceeds a second predetermined threshold, generating a user perceptible alarm to alert the user that a flow stop open condition may have occurred.
