Transcutaneous monitoring of critical perfusion-efficiency situa

Details Transcutaneous monitoring of critical perfusion-efficiency situa Transcutaneous monitoring of critical perfusion-efficiency situa

1978-09-14

1980-10-28

Michell, Robert W.

Surgery

Truss

Pad

128691, A61B 500, A61B 502

Patent

active

042301220

ABSTRACT:
First and second probes are laid against the skin to transcutaneously measure perfusion and e.g., oxygen concentration and generate corresponding first and second signals. These signals are fed to a signal-processing unit which triggers an alarm whenever changes in these signals meet predetermined rate-of-change criteria. Among these criteria is parallel increase in both perfusion and e.g., oxygen concentration, parallel decrease in both perfusion and e.g., oxygen concentration, and unchanging perfusion accompanied by decreasing e.g., oxygen concentration. The probes are occasionally pressed against the skin, for example under the control of a timer, with a pressure in excess of 1 g/cm.sup.2, to occasionally induce hyperemic conditions and see whether parallel changes in perfusion and concentration result.

REFERENCES:
patent: 3504664 (1970-04-01), Haddad
patent: 3623473 (1971-11-01), Andersen et al.
patent: 3659586 (1972-05-01), Johns et al.
patent: 3795239 (1974-03-01), Eberhard et al.
patent: 3918434 (1975-11-01), Lubbers et al.

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