Method and apparatus for in vivo blood gas analysis

Details Method and apparatus for in vivo blood gas analysis Method and apparatus for in vivo blood gas analysis

1975-07-07

1976-10-05

Howell, Kyle L.

Surgery

Truss

Perineal

23230B, 23232C, 734215R, 128 2F, 128 2L, 1282144

Patent

active

039838641

ABSTRACT:
Method and apparatus for withdrawing and analyzing gases dissolved in liquid, more specifically, equilibrated blood gas samples in vivo. A catheter including a semipermeable membrane, connected to include a volume of carrier gas at atmospheric pressure, is introduced percutaneousluy into the bloodstream. After a predetermined period, equilibratin occurs between the blood gases and the carrier gas. By means of displacement in the volume or reduction in the pressure, the carrier gas including the equilibrated gas is then removed from the semipermeable membrane to another area for analysis. A corresponding volume of carrier gas is replaced in the semipermeable membrane from an inlet supply.

REFERENCES:
patent: 3512517 (1970-05-01), Kadish et al.
patent: 3572315 (1971-03-01), Cullen II
patent: 3585002 (1971-06-01), Boys
patent: 3640269 (1972-02-01), Delgado
patent: 3649199 (1972-03-01), Littlejohn
Med and Biol. Engng., vol. 8, No. 2, pp. 111-128, (1970).
Journ, of Thoracic and Cardiovascular Surg., vol. 62, No. 6, Dec. 1971, pp. 844-850.

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