Related Experiment Video
Updated: Oct 2, 2026

Expired CO2 Measurement in Intubated or Spontaneously Breathing Patients from the Emergency Department
Published on: January 29, 2011
End-tidal CO2 monitoring in mitral stenosis patients undergoing closed mitral commissurotomy
G D Puri1, R Venkatraman, H Singh
1Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Abstract:
Arterial to end-tidal carbon dioxide difference (P(a-E')CO2) was recorded in 20 mitral stenosis patients (group A) for closed mitral commissurotomy and 20 healthy individuals (group B) for elective limb surgery. Mitral stenosis patients showed a greater difference than group B patients. Repeated measurements of P(a-E')CO2 in mitral stenosis patients at various stages of closed mitral commissurotomy not only showed a mean increase from before thoracotomy but there was also no correlation between P(a-E')CO2 before thoracotomy with that after thoracotomy, after commissurotomy or after chest closure. This indicated that end-tidal CO2 monitoring was unsuitable to measure adequacy of ventilation during closed mitral commissurotomy.
Related Concept Videos
Assessment of Diffusion and Perfusion
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...
Mitral Valve Prolapse II: Assessment and Management
Mitral Regurgitation III: Medical Management
Mitral Stenosis II: Clinical features and Diagnostic Tests
Mitral Stenosis III: Medical Management
Mitral Stenosis IV: Nursing Management

