Arrangement for the determination of the effective pulmonary...

Details Arrangement for the determination of the effective pulmonary... Arrangement for the determination of the effective pulmonary...

2005-01-11

2005-01-11

Nasser, Robert L. (Department: 3736)

Surgery

Diagnostic testing

Respiratory

C600S529000

Reexamination Certificate

active

06840906

ABSTRACT:
The invention relates to a device to determine effective pulmonary blood flow (PBF) by means of partial CO2rebreathing. The device is characterized in that it comprises an endotracheal tube whose conduit leading from the patient to the respirator is divided up into two lines between a controllabe three-way valve (4) and a Y-piece; one line forms a larger dead area (6) for CO2rebreathing whereby, in order to measure CO2elimination and end expiratory partial CO2pressure, a CO2sensor (3) and a respiration flow sensor (1) are provided on the endotracheal tube of the patient. The calculation of effective pulmonary blood flow is provided by a microprocessor/controller (7) which also controls the three-way valve (4) which provides the switching between both lines.

REFERENCES:
patent: 6059732 (2000-05-01), Orr et al.
patent: 6106480 (2000-08-01), Gama De Abreu et al.
patent: 6200271 (2001-03-01), Kuck et al.
patent: 6238351 (2001-05-01), Orr et al.
patent: 6394962 (2002-05-01), Gama De Abreu et al.

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