Surgery – Diagnostic testing – Cardiovascular
Patent
1997-06-11
1999-02-02
Kamm, William E.
Surgery
Diagnostic testing
Cardiovascular
600485, 600526, A61B 502, A61B 5026, A61B 5021
Patent
active
058657584
ABSTRACT:
A system (method and apparatus) for hemodynamic measurements of the cardiac activity, including the stroke volume and cardiac output on the basis of a blood pressure pulse wave of a patient. Using a function that relates cardiac activity to an anthropometric parameter of the patient (height or arm span), ordinates of the pulse wave, and time intervals of certain characteristic points of the pulse wave, the stroke volume and/or cardiac output are obtained. The pulse wave can be determined by means of an optical sensor clipped to an ear lobe of the patient. The characteristic points and time intervals from the initial point of the pulse wave to the characteristic points are obtained under computer control. The measured values of the time intervals and ordinates are inputted to the computer which computes cardiac output, stroke volume and other cardiac information related thereto.
REFERENCES:
patent: 4066066 (1978-01-01), Paek
patent: 4562843 (1986-01-01), Djordevich
patent: 4790326 (1988-12-01), Mather
patent: 4834107 (1989-05-01), Warner
patent: 5183051 (1993-02-01), Kraidin et al.
patent: 5299120 (1994-03-01), Kaestle
patent: 5682898 (1997-11-01), Aung et al.
SU Inventor's Certificate No. 736955, Cl. A 61B5/02, 1980.
E.I. Zborovsky, Method for Analysis of Energy Spectra of Sphygmogrmas and Experience in Clinical Application of the Results of This Analysis, Novosibirsk, 1971.
Yu. I Gaevsky, Dynamopulsography as a Method for Analysis of Systolic Function of Heart, Function of Aorta Valve, and Resilient Properties of Blood Vessels, PhD Thesis, Perm, 1972.
A.I. Leshchenko, Determination of Stroke vol. of Heart based on Duration of Sphygmic Phase and Frequency of Systoles. "Vrachebnoe Delo", 1973, No. 12, pp. 28-30.
I.M. Kaevitzer, N.P. Paleev, Graphical Methods of Analysis . . . and of the Pulse. "Cardiology", 1975, vol. 15, No. 6, pp. 150-155.
Millington, R.F., Radial Arterial Pulse Measurement, J. Appl. Physiol. 1977, vol. 273, No. 2, pp. 25-26.
V.S. Logvinov, Diagnostic Methods based on Parameters of Oscillatory and Harmonic Processes in the Cardiovascular System. Pulse-Based Diagnostics In Tibetan Medicine, Novosibirsk, Nauka Pub. 1988 pp. 90-108.
Boronoev, V.B. Poplaukhin, V.N. Pulse-Based Diagnostics in Tibetan Medicine, Tibetan Medicine, Ulan-Ude, 1994, pp. 45-50.
Kamm William E.
Layno Carl H.
Lukacher K.
Lukacher M.
Nite Q Ltd
LandOfFree
System for obtaining hemodynamic information does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for obtaining hemodynamic information, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for obtaining hemodynamic information will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1112262