Canadian Journal of Anesthesia, Vol 12, 11-28, Copyright © 1965 by Canadian Anesthesiologists' Society

A New Ventilator Designed to Meet the Present-Day Needs of Mechanical Aid to Ventilation in the Treatment of Respiratory Failure

¹ Department of Medicine, State University of New York Upstate Medical Center, Syracuse, New York

A description is presented of an internal ventilator which has the following features: (1) patient-triggering with guaranteed.minimum frequency; (2) constant volume or constant ventilation as determined by the physician; (3) continuous, automatic monitoring of expired air tidal volume; (4) optional negative phase when ventilation is maintained jat constant levels; (5) control over inspiratory flow rate and air-oxygen ratios. The ventilator has been tested under laboratory conditions and in separate series of short-term and long-term applications, and has been found useful because it provides the responsiveness and flexibility of patient-triggered apparatus, the basic security of constant ventilation or guaranteed minimum ventilation, and an automated system for monitoring ventilation. The rationale for design) of a ventilator with these refinements is discussed and relates to the present population of patients requiring mechanical aid to ventilation.

Note:

This study was supported in part by U.S. Public Health Service Grant PN-2014 and by a grant from the Hendricks Fund.