公开(公告)号：US3548178A

公开(公告)日：1970-12-15

申请号：US3548178D

申请日：1968-01-18

Applicant: IBM

Inventor： CARNEVALE RICHARD J ,  CURRAN JOHN E ,  DOHANICH GEORGE J JR ,  O'DONNELL JOHN F ,  SPEER WILLIAM H ,  TRUDGEN GARY A ,  WALLACE LEONARD J

IPC: G06F11/00 ,  G11C29/00

CPC classification number: G06F11/00

公开(公告)号：CA1114472A

公开(公告)日：1981-12-15

申请号：CA334071

申请日：1979-08-20

Applicant: IBM

Inventor： MULZET ALFRED P ,  TRUDGEN GARY A

IPC: G01L7/00 ,  A61B5/0215 ,  A61M1/16 ,  A61M1/36 ,  G01L9/00 ,  G01L9/04 ,  G01L19/00 ,  G01L27/00 ,  G05D16/20 ,  G01L7/02

Abstract: PRESSURE MONITORING SYSTEM A pressure monitoring system especially suitable for use with extra corporeal circulation systems such as dialyzers, blood cell separators, oxygenators and the like, in which the internal system pressure must be monitored at one or more locations in the blood circuit, and appropriate warnings provided of pressure increases or decreases within defined limits. An initial pressure measuring cycle is provided and must be completed successfully before the main operating cycle of the overall system can begin. A pressure transducer provides signals to a digital closed-loop system which provides a suitable compensation during the initial or primary cycle and then holds that compensation value during the machine running cycle. Excursions or pressure beyond upper and lower limits of the stored reference or compensation value, in either direction, will cause the running cycle to terminate automatically.