Surgery – Diagnostic testing – Cardiovascular
Patent
1997-05-15
1998-11-10
Nasser, Robert L.
Surgery
Diagnostic testing
Cardiovascular
600500, 623 3, A61B 500
Patent
active
058336192
ABSTRACT:
An apparatus and method for measuring the blood pressure of a patient with a permanent or temporary cardiac assist device throughout an entire cardiac cycle by partially filling the inflatable chamber of the cardiac assist device operatively disposed with respect to an aorta with pressurized fluid and using the partially filled chamber as a transducer. An external pressure sensor is located in a drive unit connected to the inflatable chamber. The drive unit controls, monitors and stores the fluid pressure with respect to the inflatable chamber. When isolated from a pressurized fluid reservoir, the pressure within the inflatable chamber corresponds to the current blood pressure of the patient throughout the cardiac cycle. The inflatable chamber preferably is defined at least in part by a flexible membrane. The inflatable chamber is partially inflated with a predetermined volume of pressurized fluid from the reservoir. The partially inflated chamber is then isolated from the reservoir for at least one complete cardiac cycle, and preferably two complete cardiac cycles. The blood pressure wave form of the patient is continuously monitored and stored by measuring the pressure variations in the isolated, partially filled, chamber. A control program evaluates the stored pressure data and updates a patient parameter table with current heart function parameters for subsequent use during the next series of diastolic augmentation, inflation/deflation cycles of the inflatable chamber.
REFERENCES:
patent: 4712563 (1987-12-01), Link
patent: 4741328 (1988-05-01), Gabbay
patent: 4781715 (1988-11-01), Wurzel
patent: 4782817 (1988-11-01), Singh et al.
patent: 4785795 (1988-11-01), Singh
patent: 4877035 (1989-10-01), Bogen et al.
patent: 4888011 (1989-12-01), Kung et al.
patent: 4902272 (1990-02-01), Milder et al.
patent: 5045051 (1991-09-01), Milder et al.
patent: 5048532 (1991-09-01), Hickey
patent: 5089016 (1992-02-01), Millner et al.
patent: 5352180 (1994-10-01), Candelon et al.
Freed Paul S.
Kantrowitz Adrian
L. Vad Technology, Inc.
Nasser Robert L.
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