Surgery – Truss – Perineal
Patent
1975-08-27
1977-04-12
Howell, Kyle L.
Surgery
Truss
Perineal
128 2L, A61B 500
Patent
active
040168638
ABSTRACT:
A tissue gas diffusion catheter device which includes an impervious catheter, the lumen of which is filled with an impervious element extending beyond the distal end of the catheter. The catheter is enclosed for its full length as well as the element extending through the lumen of the catheter and there beyond to a plug of the same diameter as the catheter by means of a membrane permeable to gases but not to liquids that might be found in body tissue. That end portion between the distal termination of the catheter and the plug forms a liquid chamber which may be filled with water or other suitable fluid in a manner to allow the catheter fluid to become equilibrated or "tonometered" with the gas contained in the surrounding body tissue, such tonometer fluid being capable of being analyzed for gas content using the usual blood gas analyzing instruments available in hospital laboratories. Such analysis may be made in an immediately accessible laboratory or a laboratory remotely located.
REFERENCES:
patent: 3572315 (1971-03-01), Cullen
patent: 3658053 (1972-04-01), Fergusson et al.
patent: 3824157 (1974-07-01), Macur
patent: 3844275 (1974-10-01), Elliott
patent: 3893448 (1975-07-01), Brantigan
patent: 3923627 (1975-12-01), Niedrach et al.
Wald, A., et al., Med. & Biol. Engng., vol. 8, No. 2, pp. 111-128, 1970.
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