Boots – shoes – and leggings
Patent
1988-08-17
1989-09-26
Jablon, Clark A.
Boots, shoes, and leggings
36441307, 128693, 128671, A61B 504
Patent
active
048705780
ABSTRACT:
An electrical bioimpedance measuring device is used to measure changes in the electrical resistance of a segment of the thorax of a human body caused by changes in the blood perfusion in that segment resulting from the pumping action of the heart. The electrical resistance of also changes as a result of respiration, and the respiratory-induced changes are typically much larger than the cardiac-induced changes and cause large changes in the voltages in the measuring equipment. In order to suppress the large voltage changes, a clamping circuit is included that is synchronized with the electrical activity of the heart. The clamping circuit is timed to clamp the voltages in the measuring equipment to a baseline reference voltage in the time preceding the beginning of mechanical systole. The voltage clamping is released during the mechanical systole of the heart so that the changes in the voltages (i.e., the bioimpedance changes) caused by the pumping action of the heart during mechanical systole can be measured.
REFERENCES:
patent: 3976052 (1976-08-01), Junginger et al.
patent: 3994284 (1976-11-01), Voelker
patent: 4305400 (1981-12-01), Logan
patent: 4422458 (1983-12-01), Kravath
patent: 4450527 (1984-05-01), Sramek
patent: 4676253 (1987-06-01), Newman et al.
patent: 4757824 (1988-07-01), Chaumet
W. G. Kubicek et al., "Development and Evaluation of an Impedance Cardiac System", Aerospace Medicine, vol. 9, Dec. 1966, pp. 1208-1212.
W. G. Kubicek et al., "The Minnesota Impedance Cardiograph-Theory and Applications", Biomedical Engineering, Sep. 1974, pp. 410-416.
Miyamoto, Y. et al., "Automatic Determination of Cardiac Output Using an Impedance Plethysmography", Biotelemetry Patient Monitoring, vol. 8, No. 4, 1981, pp. 189-203.
Miyamoto, Y. et al., "Automatic Determination of Cardiac Output by Impedance Plethysmography Under Various Conditions", Proceeding of the VTH ICEBI, Aug. 1981, Tokyo.
Sramek, B. Bo., "Noninvasive Technique for Measurement of Cardiac Output by Means of Electrical Impedance", Proceedings of the VTH ICEBI, Aug. 1981, Tokyo.
Sramek, B. Bo., "Cardiac Output by Electrical Impedance", Medical Electronics, Apr. 1982, pp. 93-97.
Sramek, B. Bo. et al., "Stroke Volume Equation With a Linear Base Impedance Model and Its Accuracy, As Compared to Thermodilution and Magnetic Flow Meter Techniques in Humans and Animals", Proceedings of the VITH International Conference on Electrical Bioimpedance, Zadar, Yugoslavia, 1983.
Sramek, B. Bo., "Electrical Bioimpedance", Medical Electronics, Apr. 1983, pp. 95-10-5.
Geddes, "The Measurement of Cardiac Output and Blood Flow", Chapter Four, Cardiovascular Devices and Their Application, John Wiley and Sons, New York, 1984, pp. 100-107 and 122-135.
Sramek Bohumir
Vysin Vlastimil P.
Bomed Medical Manufacturing, Ltd.
Jablon Clark A.
LandOfFree
Diastolic clamp for bioimpedance measuring device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Diastolic clamp for bioimpedance measuring device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diastolic clamp for bioimpedance measuring device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-192005