The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 2016
Filed:
Sep. 06, 2013
David Tseng Ho Hung, Palo Alto, CA (US);
David Pih, Milpitas, CA (US);
Purushottam Amarnath Patil, San Diego, CA (US);
John Michael Wyatt, San Diego, CA (US);
Vincent James Defrank, Temecula, CA (US);
David Tseng Ho Hung, Palo Alto, CA (US);
David Pih, Milpitas, CA (US);
Purushottam Amarnath Patil, San Diego, CA (US);
John Michael Wyatt, San Diego, CA (US);
Vincent James DeFrank, Temecula, CA (US);
Hospira, Inc., Lake Forest, IL (US);
Abstract
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.