Method, system and apparatus for evaluating hemodynamic paramete

Details Method, system and apparatus for evaluating hemodynamic paramete Method, system and apparatus for evaluating hemodynamic paramete

1997-01-24

1998-08-04

Bahr, Jennifer

Surgery

Diagnostic testing

Cardiovascular

600479, A61B 5028

Patent

active

057886474

ABSTRACT:
Method, system, and apparatus for evaluating hemodynamic parameters and, in particular, cardiac output. A pulmonary artery catheter is described which incorporates a diffuser of gas biocompatible with the body such as oxygen at an indwelling region such that the gas may be employed to carry out a dilution technique to measure cardiac output. A mixed venous blood gas level then is measured at the pulmonary artery using a gas sensor. The preferred gas sensor employs oximetry to derive values of mixed venous oxygen saturation. An alternate embodiment utilizes an electrode/electrolyte approach as the gas sensor to carry out measurement of dissolved oxygen in mixed venous blood. The system utilizes a microprocessor driven controller to develop multiple evaluations over sequential measurement intervals and to compute a variety of hemodynamic parameters including the noted cardiac output.

REFERENCES:
patent: 4949724 (1990-08-01), Mahutte et al.
patent: 5092339 (1992-03-01), Geddes et al.
patent: 5611338 (1997-03-01), Gallup et al.
patent: 5647359 (1997-07-01), Lohno et al.

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