Surgery – Truss – Pad
Patent
1979-10-16
1982-01-19
Cohen, Lee S.
Surgery
Truss
Pad
204195B, 204195P, A61B 500
Patent
active
043111513
ABSTRACT:
A polarographic electrode assembly for transcutaneous measurement of partial oxygen pressure in arterial blood comprising an anode, a cathode which has a thin ring surface or a circularly-bounded field of dot-shaped surfaces and an insulating electrode holder, a disposable tubular member holder fixedly holding the periphery of an oxygen permeable hydrophobic electrode membrane, and a skin-heating part including heat-conducting block which is thermally connected to a heater and a temperature detector. The heat-conducting block has a thick peripheral portion and thin disk-shaped inner portion having a through-hole to expose the cathode surface to the subject's skin via the membrane. One side of the heat-conducting block has a smooth surface to be applied on skin, and the back side has a receiving space for the membrane holder. The heat-conducting block embraces the membrane holder which embraces the anode and cathode portion of the electrode part in such a manner that the membrane covers the working surfaces of the anode and cathode via an electrolyte layer. In a prefabrication step the membrane is strongly bonded in a uniformly stretched condition to the holder for stability of sensitivity of the electrode. By using such a cathode a good correlation coefficient of measured PO.sub.2 over actual arterial PO.sub.2 and a good S/N ratio are provided, and by using a skin heating block having a sufficient heating area a highly stable electrode sensitivity is assured.
REFERENCES:
patent: 3659586 (1972-05-01), Johns et al.
patent: 3795239 (1974-03-01), Eberhard et al.
patent: 3918434 (1975-11-01), Lubbers et al.
patent: 3933593 (1976-01-01), Sternberg
patent: 3985633 (1976-10-01), Lubbers et al.
patent: 3998212 (1976-12-01), Reichenberger
patent: 4185620 (1980-01-01), Hagihara
Evans et al., "The Systemetic O.sub.2 Supply . . . ", Resp. Phys., 1967, 3, pp. 21-37.
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