Journal of Applied Physiology
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J Appl Physiol 41: 252-255, 1976;
8750-7587/76 $5.00
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Journal of Applied Physiology, Vol 41, Issue 2 252-255, Copyright © 1976 by American Physiological Society

ARTICLES

Servo respirator constructed from a positive-pressure ventilator

J. E. Remmers and H. Gautier

We have constructed an electronically controlled respirator from three commercially available components: a positive-pressure ventilator, a recorder pen motor, and a differential amplifier. Using negative feedback derived from a tracheal pressure signal, the instrument functions as a servo respirator which provides precise control of tracheal pressure. The system's power and response characteristics are well suited for ventilation of anesthetized cats and dogs. The servo respirator can be used as an externally controlled respiratory pump which provides flexibility in selection of the parameters of the ventilatory cycle. Alternatively, it can function as a "demand" respirator which generates transthoracic pressure proportional to efferent respiratory discharge.


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[Abstract] [Full Text] [PDF]


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