Surgery – Truss – Perineal
Patent
1975-05-05
1976-12-14
Michell, Robert W.
Surgery
Truss
Perineal
128 205F, 128 21Z, 23515134, 324 65R, 73195, A61B 502
Patent
active
039969258
ABSTRACT:
A method and apparatus for determining and displaying without invasion into the vascular system the instantaneous rate of blood flow, the stroke volume during a pulse or cycle, and the cardiac output over a time period. The system involves an arrangement of electronic units through which a signal representing impedance of a section of a living body is passed in a special order and which results in instantaneous and continuous indication of blood flow characteristics through this section.
A principal feature of the system resides in the provision of two electrical channels one of which contains an electronic divider and the other an electronic differentiator both of which channels are connected with a multiplier which multiplies the signal from one channel with the signal from the other channel to produce a signal representative of the rate of instantaneous blood flow through the body section being tested.
REFERENCES:
patent: 3433935 (1969-03-01), Sherman
patent: 3651318 (1972-03-01), Czekajewski
patent: 3678922 (1972-07-01), Phillips et al.
patent: 3835839 (1974-09-01), Brown
patent: 3835840 (1974-09-01), Mount
patent: 3874368 (1975-04-01), Asrican
Ellis et al, "Computerized . . . thermal dilution," JAAMA, vol. 6, No. 2, Mar.-Apr. 1972, pp. 116-121.
Batz Carl C.
Cohen Lee S.
Michell Robert W.
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