Automatic electronic apparatus for measuring the bronchial resis

Details Automatic electronic apparatus for measuring the bronchial resis Automatic electronic apparatus for measuring the bronchial resis

1975-04-15

1977-07-19

Michell, Robert W.

Surgery

Truss

Perineal

A61B 508

Patent

active

040362221

ABSTRACT:
The invention relates to medical science.
According to the invention, the resistance to air flow through the bronchial tracts and the elastance of the pulmonary tissue are measured and displayed, starting from signals which represent the respiratory air flow and the variation in endothoracic pressure, by means of an apparatus which comprises a flow signal preamplifier, a pressure signal preamplifier, two automatic calculating devices and an electronic control combination.
The apparatus makes it possible to use endothoracic pressures measured via the central venous system and can possess an alarm signal which is triggered automatically if the values displayed are memorized values.

REFERENCES:
patent: 3598111 (1971-08-01), Kahn
patent: 3621833 (1971-11-01), Crane
patent: 3797479 (1974-03-01), Graham
patent: 3902481 (1975-09-01), Bargeton et al.
patent: 3903875 (1975-09-01), Hughes
patent: 3924612 (1975-12-01), Dempster et al.
Gulesian, "An Instrument . . . MEFV Parameters", IEEE Trans. on Bio-Med. Eng. Sept. 1971, pp. 378-379.
Murphy et al., "A Dynamic Complance Computer: Comparison . . . Man", J. of App. Phys., vol. 36, No. 5, May 1974, pp. 629-633.
Hilberman et al., "On-line Assessment . . . acutely ill", JAAMI, vol. 6, No. 1, Jan.-Feb. 1972, pp. 65-69.
Comroe et al., "Design of a Body Plethys . . . Physiology.", J. Applied Physiology, vol. 14, 1959, May, pp. 439-444.

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