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:
Mar. 15, 2011
Filed:
Aug. 25, 2006
David T. Wang, Sunnyvale, CA (US);
Peter J. Scaramuzzi, Morgan Hill, CA (US);
Mansour A. Saleki, San Jose, CA (US);
Robert P. Cousineau, Boston, MA (US);
Kent D. Abrahamson, Morgan Hill, CA (US);
Michael W. Lawless, Locust Grove, OK (US);
Marwan A. Fathallah, Mundelein, IL (US);
Brian A. Kidd, Seattle, WA (US);
Robert R. Boyd, Jacksonville, FL (US);
Howard L. Greene, Worthington, OH (US);
Eric R. Navin, Columbus, OH (US);
Lori E. Lucke, Eagan, MN (US);
Benjamin T. Mullin, Lino Lakes, MN (US);
David T. Wang, Sunnyvale, CA (US);
Peter J. Scaramuzzi, Morgan Hill, CA (US);
Mansour A. Saleki, San Jose, CA (US);
Robert P. Cousineau, Boston, MA (US);
Kent D. Abrahamson, Morgan Hill, CA (US);
Michael W. Lawless, Locust Grove, OK (US);
Marwan A. Fathallah, Mundelein, IL (US);
Brian A. Kidd, Seattle, WA (US);
Robert R. Boyd, Jacksonville, FL (US);
Howard L. Greene, Worthington, OH (US);
Eric R. Navin, Columbus, OH (US);
Lori E. Lucke, Eagan, MN (US);
Benjamin T. Mullin, Lino Lakes, MN (US);
Hospira, Inc., Lake Forest, IL (US);
Abstract
A medical pump with an improved continuity low flow delivery system and method for use with a pumping chamber, for example in a cassette, is disclosed. The pump includes a pump drive for exerting a force on the pumping chamber and a sensor for sensing the force/pressure exerted by the pump drive on the pumping chamber. The pump drive position sensor senses the position of the pump drive. The medical pump also includes a processing unit and a memory having a programming code adapted to calculate the rate of change of the sensed force/pressure values and determine whether the rate of change of the sensed force/pressure values meets a rate of change threshold. Once the rate of change threshold is met, the programming code is adapted to calculate a remaining pump drive travel value for determining how much farther the pump drive should travel before the end of an effective pump cycle. The programming code is further adapted to trigger one or more signals to drive the pump drive for the remainder of the effective pump cycle using the remaining pump drive travel value.