Surgery – Truss – Pad
Patent
1987-01-22
1988-01-12
Howell, Kyle L.
Surgery
Truss
Pad
128681, 128677, A61B 502
Patent
active
047184280
ABSTRACT:
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 response 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.
REFERENCES:
patent: 3157177 (1964-11-01), Smith
patent: 3348534 (1967-10-01), Marx et al.
patent: 3581734 (1971-06-01), Croslin
patent: 3903872 (1975-09-01), Link
patent: 4009709 (1977-03-01), Link et al.
patent: 4074711 (1978-02-01), Link et al.
patent: 4105021 (1978-08-01), Williams et al.
patent: 4216779 (1980-08-01), Squires et al.
patent: 4245648 (1981-01-01), Trimmer et al.
patent: 4262675 (1981-04-01), Kubo et al.
patent: 4271843 (1981-06-01), Flynn
patent: 4271844 (1981-06-01), Croslin
patent: 4313445 (1982-02-01), Georgi
patent: 4343314 (1982-08-01), Sramek
patent: 4349034 (1982-09-01), Ramsey, III
patent: 4378807 (1983-04-01), Peterson et al.
patent: 4407297 (1983-10-01), Croslin
patent: 4408614 (1983-10-01), Weaver et al.
patent: 4418700 (1983-12-01), Warner
patent: 4437469 (1984-03-01), Djordjevich et al.
patent: 4479494 (1984-10-01), McEwen
D. Bahr et al.; "The Automatic Arterial Tonometer"; Engr. in Med. and Biol.-Proc. of the Annual Conference, 1973, vol. 15, p. 259.
D. Bergel; "The Dynamic Elastic Properties of the Arterial Wall"; Journal of Physiology, (1961), vol. 156, pp. 458-469.
D. Bergel; "The Static Elastic Properties of the Arterial Wall"; Journal of Physiology, (1961), vol. 156, pp. 445-457.
P. Flaud et al.; "An Experimental Device for Modeling Arterial Blood Flow"; Revue De Physique Appliquee, (France), vol. 10, No. 2, 3-1975, pp. 61-67.
P. Flaud et al.; "Pulsed Flows in Viscoelastic Pipes-Application to Blood Circulation"; Journal de Physique, (France), vol. 35, No. 11, 11-1974, pp. 869-882.
L. Geddes; "The Direct and Indirect Measurement of Blood Pressure"; (Chicago: Year Book Medical Publishers, Inc., 1970), pp. 77-83.
J. Kinser et al.; "Noncontact Microprocessor-Based Ocular Pulse Monitoring System"; Computers in Opthalmology, St. Louis, Mo., 4/1978, pp. 212-219.
Cortronic Corporation
Howell Kyle L.
Sykes Angela D.
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