Alveolar gas sampling system and method

Details Alveolar gas sampling system and method Alveolar gas sampling system and method

1978-11-24

1980-09-02

Howell, Kyle L.

Surgery

Truss

Pad

128719, 128730, A61B 508

Patent

active

042201624

ABSTRACT:
An alveolar gas sampling system comprises a catheter adapted for placement in a patient's nostril or in an endotracheal tube and connected to a positive displacement pump through a three way valve. Signal means for detecting onset of inspiration and expiration is mounted at the tip of the catheter and connected to a controller. The positive displacement pump is driven by a reversible stepper motor actuated by the controller during the flow of alveolar air. When the desired amount of alveolar gas has been sampled, the stepper motor is reversed and the position of the valve is switched by the controller causing the alveolar gas collected in the positive displacement pump to be expelled for analysis.

REFERENCES:
patent: 3395701 (1968-08-01), Bartlett, Jr. et al.
patent: 3509771 (1970-05-01), Moberg et al.
patent: 3613665 (1971-10-01), Gorsuch
patent: 3661528 (1972-05-01), Falk
patent: 3910261 (1975-10-01), Ragsdale
patent: 3927670 (1975-12-01), Turney et al.

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