PEDIATRIC TIDAL VOLUME INDICATOR AND VENTILATOR ADAPTATION

摘要

- 20 -PEDIATRIC TIDAL VOLUME INDICATOR AND VENTILATOR ADAPTATIONABSTRACT OF THE DISCLOSUREThe tidal volume indicator consists of a spirometerin conjunction with a ventilator system adapted for use forsmall children and neonates. The ventilator system incor-porates valving to segregate the component parts into amachine system and a patient system and includes a unidirec-tional check valve between the exhalation valve manifold andthe patient system. The tidal volume indicator includes aspirometer with read-out amplifier operatively connectedtherewith which enables the volume to be read accuratelyfrom between, for example, 0 and 150 ml. It consists ofa rack and pinion assembly connected to the verticallymoving shaft of the spirometer and a volume indicator needlein conjunction with the necessary scale. Also included isan adjustable warning operating device which will actuatean alarm or indicator if the preset volume deviates by apredetermined amount.