Registers – Transfer mechanism – Traveling pawl
Patent
1975-11-18
1977-07-12
Smith, Jerry
Registers
Transfer mechanism
Traveling pawl
128 205F, 128 205V, G06F 1542, A61B 502
Patent
active
040356221
ABSTRACT:
The invention relates to a process for measuring the cardiac capacity or cardiac stasis at each heart beat V by dilution of the indicator (stain or frigories) injected above the heart, as well as an apparatus for performing this process.
According to the invention, a quantity Q.sub.i of indicator is injected at a constant flow rate D.sub.i for a time t.sub.i corresponding to at least two heart beats, wherein the concentration of indicator in the blood (or the temperature variation in the blood) is measured at the end of indicator injection .DELTA..sub.m and .DELTA.(t) being the indicator concentration (or temperature variation) as a function of the time t assuming t = O at the start of the injection, t.sub.m being the time at the end of the injection, the integrals ##EQU1## ARE MEASURED AND THEN THE CARDIAC CAPACITY (V) is deduced from the thus measured values.
REFERENCES:
patent: 3304413 (1967-02-01), Lehmann et al.
patent: 3527542 (1970-09-01), Penhasi et al.
patent: 3618591 (1971-11-01), Bradley et al.
patent: 3651318 (1972-03-01), Czekajewski
patent: 3677648 (1972-07-01), Dorsch
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