[Atelectasis during general anaesthesia - mechanisms and importance]

Area of Science:

• Anesthesiology
• Pulmonary Medicine
• Critical Care

Background:

• Atelectasis, previously a concept, was established as a clinical entity in 1985 using computed tomography.
• Key findings from the original study on anesthesia-induced atelectasis remain valid: immediate onset, impaired oxygenation via shunting, and efficacy of positive end-expiratory pressure.

Purpose of the Study:

• To review the enduring significance of early atelectasis research in anesthesia.
• To highlight the ongoing obscurity surrounding atelectasis's role in postoperative complications and protective ventilation strategies.
• To emphasize the need for further research into oxygen's role in atelectasis development.

Main Methods:

• Review of historical and contemporary research on anesthesia-induced atelectasis.
• Analysis of the impact of atelectasis on arterial oxygenation.
• Evaluation of positive end-expiratory pressure as an intervention.

Main Results:

• Anesthesia commonly induces atelectasis in adult patients.
• Atelectasis significantly impedes arterial oxygenation due to intrapulmonary shunting.
• Positive end-expiratory pressure effectively counteracts atelectasis formation.

Conclusions:

• The foundational understanding of anesthesia-induced atelectasis is robust.
• The contribution of atelectasis to postoperative pulmonary complications needs clarification.
• The role of oxygen concentration in protective ventilation strategies warrants extensive investigation.