Related Experiment Video
Updated: Aug 19, 2026

Expired CO2 Measurement in Intubated or Spontaneously Breathing Patients from the Emergency Department
Published on: January 29, 2011
Potential for barotrauma or hypoventilation with the Dräger AV-E ventilator
1Department of Anesthesiology, Mount Sinai School of Medicine, City University of New York, NY 10029-6574.
Abstract:
The system pressure relief valve of the Dräger AV-E anesthesia ventilator is powered by connecting tubing from the ventilator. In this case, the tubing became kinked when the anesthesia machine was moved. This resulted in an iatrogenically induced valve malfunction and increasing minimum and peak pressures in the patient circuit. A laboratory study was performed to evaluate the effects of kinking the connecting tubing. The potential for producing barotrauma or hypoventilation with this design of ventilator is discussed. Repositioning the anesthesia machine after a satisfactory check may precipitate a hazardous situation. An anesthesia machine should be checked out in the final position in which it is to be used.
More Related Videos
Related Concept Videos
Acute Respiratory Failure-II
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
Acute Respiratory Failure-III
Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen
Venturi Mask
The Venturi mask, named after the Venturi effect, is designed to deliver precise oxygen concentrations. It consists of a large tube with an oxygen inlet that narrows down, causing a pressure drop that pulls air in through adjustable side ports. The mask is a lightweight,...
Mechanical Ventilation I: Indication and Settings
Mechanical Ventilation II: Invasive Ventilation
Negative-Pressure Ventilators
Negative-pressure ventilators create a vacuum around the chest or body to draw air into the lungs, simulating breathing. This method does not require an...
Ventilatory Modes
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...

