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Area of Science:

  • Critical Care Medicine
  • Respiratory Physiology

Background:

  • Protective ventilation strategies aim to minimize lung injury during mechanical ventilation.
  • Positive end-expiratory pressure (PEEP) is used during one-lung ventilation (OLV) to prevent alveolar collapse and improve oxygenation.

Purpose of the Study:

  • To evaluate the risks and benefits of using PEEP during OLV.
  • To determine optimal PEEP titration strategies for improved patient outcomes.

Main Methods:

  • Review of literature on PEEP application during OLV.
  • Analysis of PEEP's effects on ventilation/perfusion (V/Q) matching, pulmonary vascular resistance, and hemodynamics.
  • Discussion of PEEP titration methods based on driving pressure and respiratory compliance.

Main Results:

  • PEEP can prevent atelectrauma but may increase pulmonary vascular resistance and worsen V/Q mismatch in hyperoxic conditions.
  • PEEP use is associated with potential hemodynamic instability and increased need for fluids and vasoactive drugs.
  • Titrating PEEP to optimize respiratory and pulmonary system compliance, particularly using driving pressure, may improve outcomes.

Conclusions:

  • The potential for harm necessitates judicious PEEP use during OLV, even when titrated.
  • PEEP should be applied only as needed to ensure adequate gas exchange under protective ventilation settings.
  • Individualized PEEP titration based on driving pressure is recommended to balance benefits and risks.