Method and apparatus for conducting xenon inhalation studies

Details Method and apparatus for conducting xenon inhalation studies Method and apparatus for conducting xenon inhalation studies

1985-04-15

1986-11-18

Recla, Henry J.

Surgery

Truss

Pad

12820314, A61B 600

Patent

active

046229760

ABSTRACT:
Inhalation methods and apparatus are provided for performing xenon-enhanced studies or tests. The present invention is useful during computed tomography studies to provide neurologists with accurate yet relatively inexpensive measurements of cerebral blood flow. The apparatus includes a variable volume xenon/oxygen chamber for obtaining a closed-loop arrangement with the patient, thereby minimizing xenon gas usage during the study. According to the method of the invention, the volume of the xenon/oxygen chamber is reduced during a first phase of the study, while the patient's lung xenon concentration increases. The second phase is initiated when the variable chamber obtains a selected minimum value, after which exhalation returns to the chamber. During the second phase, oxygen and xenon are added to the closed loop system to maintain the desired concentrations, carbon dioxide is removed, and the chamber volume slowly increases. Apart from xenon inhalation studies, the method and apparatus have utility for a wide range of inhalation procedures, especially those involving relatively expensive inhalation gases.

REFERENCES:
patent: 3881463 (1975-05-01), LeMon
patent: 3890959 (1975-06-01), Youdin et al.
patent: 4150670 (1979-04-01), Jewett et al.
patent: 4169465 (1979-10-01), Walls et al.
patent: 4202345 (1980-05-01), Farella et al.
Ruben, "Anaesthesia System with Eliminated Spill Valve Adjustment and without Lung Rupture Risk", Acta Anaesth. Scand., 1984; 28: 310-314.
Gur et al, "Simultaneous Mass Spectrometry and Thermoconductivity Measurements of End-Tidal Xenon Concentrations: A Comparison", Med. Phys. 11(2), Mar./Apr. 1984, pp. 209-211.

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