Unilateral high-frequency jet ventilation during one-lung ventilation for thoracotomy

Area of Science:

• Thoracic Surgery
• Anesthesiology
• Respiratory Physiology

Background:

• One-lung ventilation is crucial for thoracic surgeries but risks severe hypoxemia.
• Managing oxygen transport during one-lung ventilation is critical for patient outcomes.

Purpose of the Study:

• To evaluate high-frequency jet ventilation (HFJV) and continuous positive airway pressure (CPAP) for improving oxygen transport during one-lung ventilation.
• To compare the effects of HFJV and CPAP on cardiac output and arterial oxygenation.

Main Methods:

• Eight patients undergoing posterolateral thoracotomy used double-lumen endobronchial tubes.
• The nondependent lung received HFJV or CPAP, while the dependent lung underwent conventional intermittent positive pressure ventilation (IPPV).
• Cardiac output and arterial oxygenation were measured during different surgical stages.

Main Results:

• Both HFJV and CPAP significantly improved arterial oxygenation (p < 0.008).
• HFJV maintained satisfactory cardiac output when the chest was open, unlike CPAP which decreased it (p < 0.008).
• No significant differences in arterial carbon dioxide levels were observed between HFJV, CPAP, and deflation.

Conclusions:

• HFJV to the nondependent lung ensures adequate oxygenation and preserves cardiac output during one-lung ventilation.
• HFJV demonstrates superior oxygen transport compared to CPAP or deflation in this context.
• HFJV is a beneficial strategy for maintaining hemodynamic stability and oxygenation during thoracotomy requiring one-lung ventilation.