Surgery – Truss – Pad
Patent
1990-09-18
1993-01-12
Howell, Kyle L.
Surgery
Truss
Pad
128695, 128696, 128734, 36441303, A61B 50295
Patent
active
051781549
ABSTRACT:
Parameters of cardiac activity can be derived from detecting thoracic impedance changes in a patient. An excitation signal is applied between a first pair electrodes located on the patient's forehead and torso. The voltage across another pair of electrodes positioned between the first pair is sensed to provide a first signal representing the impedance. The derivative of the first signal produces a second signal. Samples of the second signal taken during a number of cardiac cycles are ensemble averaged to minimized respiratory artifacts. Different criteria, such as the relationship between the second signal and an electrocardiographic signal, are employed to accept segments of the second signal which occur during different cardiac cycles. Samples of the accepted second signal segments for a number of cardiac cycles are ensemble averaged to minimize respiratory artifacts. The ensemble averaged data is employed to calculate cardiac stroke volume and cardiac output.
REFERENCES:
patent: Re30101 (1979-09-01), Kubicek et al.
patent: 3730171 (1973-05-01), Namon
patent: 3835839 (1974-09-01), Brown
patent: 3835840 (1974-09-01), Mount
patent: 3871359 (1975-03-01), Pacela
patent: 3882851 (1975-05-01), Sigworth
patent: 3994284 (1976-11-01), Voelker
patent: 3996925 (1976-12-01), Djordjevich
patent: 4270547 (1981-06-01), Steffen et al.
patent: 4303075 (1981-12-01), Heilman et al.
patent: 4305400 (1981-12-01), Logan
patent: 4450527 (1984-05-01), Sramek
patent: 4548211 (1985-10-01), Marks
patent: 4781201 (1988-11-01), Wright et al.
patent: 4802491 (1989-02-01), Cohen et al.
Preliminary Instruction Manual for the Minnesota Impedance Cardiograph Model 303.
A brochure describing the Minnesota Impedance Cardiograph Model 304b.
A brochure describing the IFM/Minnesota Impedance Cardiograph.
A paper published at the 24th ACEMB on Oct. 31 through Nov. 4, 1971 entitled "Computer Determination of Cardiac Output Means of Impedance Plethysmography".
"Continuous Monitoring of Systolic Time Intervals, Surface Electrodes During Treadmill Exercise Test" published Mar. 1, 1978.
Abstract of a paper entitled "The Use of Signal Averaging of Electrical Impedance Signals to Determine Cardiac Timing Information During Uninterrupted Exercise".
Abstract of a paper entitled "Surface Electrode Monitoring of Myocardial Function Impassive Postural Changes".
"Impedance Cardiography to Study of Postural Stress", Journal of Applied Physiology, Jul. 1970.
"Continuous Electrode Monitoring of Systolic Time Intervals During Exercise", British Heart Journal, p. 1391, 1978.
"Automatic Determination of Cardiac Output Using an Impedance Plethysmography", 1981.
"Continuous Determination of Cardiac Output During Exercise By Use of Impedance Plethysmography", 1981.
"Design of an Automatically Balancing Electrical Impedance Plethysmograph", Journal of Clinical Engineering, Apr./Jun. 1984.
"Impedance Cardiograms Reliably Estimate Beat-By-Beat Changes of Left Ventricular Stroke Volume in Humans".
"Determination of Cardiac Output Using Ensemble Average Impedance Cardiograms", 1984.
"Motion Artifact from Spot and Band Electrodes During Impedance Cardiography", 1986.
"Cardiac Output Monitoring by Impedance Cardiography During Treadmill Exercise", 1986.
"The Use of Thoracic Impedance for Determining Thoracic Blood Volume Changes in Man", 1986.
"Computer-Automatic Impedance-Derived Cardiac Indexes", 1986.
"Impedance Cardiography and Circulatory Response to Stress", Oct. 1988.
"The Trend Toward Noninvasive Monitoring", Medical Electronic Products, Sep. 1988.
"Impedance Cardiography: Noninvasive Assessment of Human Central Hemodynamics At Rest And During Exercise", Exercise and Sport Sciences Reviews, May 1989.
Ackmann James J.
Christman Norbert T.
Ebert Thomas J.
Howell Kyle L.
Schaetzle Kennedy J.
Sorba Medical Systems, Inc.
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