Method and apparatus for determining pO.sub.2 histograms

Details Method and apparatus for determining pO.sub.2 histograms Method and apparatus for determining pO.sub.2 histograms

1984-04-24

1986-04-15

Niebling, John F.

Surgery

Truss

Pad

A61B 500

Patent

active

045820643

ABSTRACT:
Apparatus for the determination of pO.sub.2 -histograms by means of a needle probe.
The apparatus for the determination of pO.sub.2 -histograms in living tissue comprises a macro needle probe of larger diameter moved stepwise between individual measurement locations, the step widths being in the order of magnitude of the probe diameter and the speed being considerably higher than pO.sub.2 -changes within the tissue. Measured values are determined shortly after the probe has come to a standstill. Thus, disturbances in the tissue pO.sub.2 due to compression effects induced by the thick probe do not falsify the measured value although a thick and stable probe is used. A polarographic measuring site with a ring-shaped metal film electrode used here is characterized especially by a recessed metal ring electrode. By this means a measuring site of low stirring effect and very short response time is obtained.

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patent: 4445515 (1984-05-01), Diresta
Ehrly & Schroeder, "Oxygen Pressure in Ischemic Muscle Tissue of Patients with Chronic Occlusive Arterial Diseases", Angiology, vol. 28, No. 2 (1977).
Spence & Walker, "Measurement of Oxygen Tension in Human Skin", Medical and Biological Engineering, vol. 14, No. 2 (Mar. 1976).
"Grundlagen und Bedeutung der lokalen Sauerstoffdruckmessung und des pO.sub.2 Histograms fur die Beurteilung der Sauerstoffversorgung der Organe und des Organismus" by D. W. Lubbers.

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