Related Experiment Video
Updated: Aug 4, 2026

Expired CO2 Measurement in Intubated or Spontaneously Breathing Patients from the Emergency Department
Published on: January 29, 2011
[Spontaneous ventilation in anesthesia. Introduction]
Abstract:
The "ventilatory requirement" can be measured in every conscious subject. But it cannot be appreciated under general anaesthesia. General anaesthesia produce a difference between the amount of spontaneous breathing of the subject and his "ventilatory requirement". A metabolic debt can appear without ventilatory compensation. So spontaneous breathing is never indicated during general anaesthesia. It can be tolerated in some technical situations when controlled breathing is impossible.
Related Concept Videos
Alterations in Respiration II
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...
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...
Mechanical Ventilation III: Noninvasive Ventilation
Noninvasive Positive-Pressure Ventilation (NIPPV)
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...
Cardiopulmonary Resuscitation II: ACLS Airway Management

