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Related Experiment Videos

Permissive hypercapnia during thoracic anaesthesia.

H Morisaki1, R Serita, Y Innami

  • 1Department of Anaesthesiology, School of Medicine, Keio University, Tokyo, Japan.

Acta Anaesthesiologica Scandinavica
|September 24, 1999
PubMed
Summary
This summary is machine-generated.

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Deliberate hypoventilation causing hypercapnia (PaCO2 >70 mmHg) during thoracic surgery in emphysema patients may be acceptable. While requiring interventions, it did not lead to serious organ dysfunction or prolonged air leaks.

Area of Science:

  • Anesthesiology
  • Pulmonology
  • Thoracic Surgery

Background:

  • Permissive hypercapnia is common in critical care but its use during anesthesia is not well-established.
  • Severe emphysema poses unique challenges for anesthesia management.
  • This study investigates the anesthetic implications of hypercapnia during thoracic surgery in emphysema patients.

Purpose of the Study:

  • To describe the anesthetic implications of hypercapnia resulting from deliberate hypoventilation in patients with severe emphysema undergoing thoracic surgery.
  • To compare outcomes between patients managed with normocapnia versus those who developed hypercapnia.

Main Methods:

  • Retrospective review of 13 patients with severe emphysema undergoing thoracic surgery.
  • Patients were divided into two groups: normocapnia (PaCO2 maintained) and hypercapnia (PaCO2 >70 mmHg due to restricted peak airway pressures).

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Main Results:

  • The hypercapnia group (n=10) experienced a wide range of PaCO2 (70-135 mmHg) and required inotropic support, oxygen insufflation, and antiarrhythmics.
  • Despite interventions, 90% of hypercapnia patients were extubated in the OR, with no observed organ dysfunction.
  • Postoperative air leak occurred in 2/3 normocapnia patients and 4/10 hypercapnia patients, with one prolonged case in each group.

Conclusions:

  • Hypercapnia up to approximately 100 mmHg during anesthesia for thoracic surgery in emphysema patients may be tolerated without severe consequences.
  • Further research is needed due to study limitations, but findings suggest potential clinical acceptability.