Surgery – Truss – Pad
Patent
1989-10-23
1992-10-27
Aschenbrenner, Peter A.
Surgery
Truss
Pad
128632, A61B 500
Patent
active
051580837
ABSTRACT:
The pCO.sub.2 probe has a miniaturized glass bulb pH sensor concentrically arranged in a flexible, noncollapsible hollow tube. A silicone end cap is expanded in a freon solvent and placed over the end of the tube while the freon evaporates, returning the end cap to its normal contracted size where it forms a tight elastic fit. The pH sensor includes an internal electrode and an outer electrode is concentrically wrapped about the glass bulb so the electrodes are in close proximity. The glass bulb and the chamber defined by the tube walls and silicone membrane are both filled with suitable electrolytes of sufficient volume to minimize air bubbles. Without air bubbles, the electrodes remain emersed in the respective electrolytes regardless of the physical orientation of the probe.
REFERENCES:
patent: 4244713 (1981-01-01), Goodwin
patent: 4741343 (1988-05-01), Bowman et al.
patent: 4834101 (1989-05-01), Collison et al.
patent: 4836907 (1989-06-01), Pedersen
patent: 4901727 (1990-02-01), Goodwin
Brantigan et al., "A Non-Thrombogenic Diffusion Membrane for Continuous In Vivo Measurement of Blood Gases by Mass Spectroscopy", Journal of Applied Physiology, vol. 28, No. 3, Mar. 1970.
Peura Robert A.
Sacristan Emilio
Shahnarian Albert
Aschenbrenner Peter A.
Mountpelier Investments, S.A.
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