04669485 is referenced by 47 patents and cites 23 patents.

Apparatus and related methods for continuous long-term non-invasive measurement of the pressure of a pulsatile fluid flowing through a flexible tube, particularly human arterial blood flow, is disclosed. Specifically, the apparatus provides a continuous calibrated pressure measurement by first undertaking a "calibration" phase comprised of determining the pressure at various pre-defined conditions of flow and, in reponse thereto, ascertaining the values of a plurality of coefficients each of which is associated with a corresponding term in a pre-defined function that characterizes fluid pressure in relation to pulsatile displacement of the wall of the tube; and second, undertaking a "continuous monitoring" phase comprised of determining each subsequently occurring pressure value as the pre-defined function of each corresponding pulsatile wall displacement value, and re-initiating the calibration phase at the expiration of pre-defined time intervals which adaptively change based upon current and prior results. Methods, which are particularly useful in conjunction with the disclosed apparatus, for ascertaining systolic and diastolic arterial blood pressure values are also disclosed.

Title
Apparatus and method for continuous non-invasive cardiovascular monitoring
Application Number
6/581134
Publication Number
4669485
Application Date
February 17, 1984
Publication Date
June 2, 1987
Inventor
Ted W Russell
Northport
NY, US
Agent
Stanger Michaelson and Einschlag
Assignee
Cortronic Corporation
NY, US
IPC
A61B 5/02
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