06899691 is referenced by 37 patents and cites 69 patents.

A method and apparatus for controlling a fluid separation system in response to fluid pressure changes in a fluid flow, said method comprising the steps of sensing a fluid pressure; comparing the fluid pressure to a threshold value, and if the fluid pressure is below the threshold value, then pausing fluid flow for a selected period. During the selected period, either the fluid pressure sensed automatically resolves or the method further comprises a step of setting a fall alarm condition. The method and apparatus may further include interpreting a particular quantity of below threshold fluid pressure occurrences where the fluid pressure is below the threshold value occurring within a particular time period, and then, signalling an alarm. Threshold values may be calculated by the method or apparatus according to a formula such as the following: Threshold Value=Config+75−0.3309*Qin/(1−Hin)−0.3026*Qn/(1−Hn); where, Config=a configuration pre-selected pressure value; Qin=fluid flow rate in the inlet tubing line; Hin=Hematocrit in the inlet tubing line; Qn=fluid flow rate in the needle; and Hn=Hematocrit in the needle.

Title
Extracorporeal blood processing methods and apparatus
Application Number
9/746987
Publication Number
6899691 (B2)
Application Date
December 22, 2000
Publication Date
May 31, 2005
Inventor
Thomas J Felt
Boulder
CO, US
Marlene A Bainbridge
Lakewood
CO, US
Agent
Laura M Butterfield
Edna M O Connor
Assignee
Gambro
CO, US
IPC
A61M 037/00
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