Changes in cerebral oxygenation in patients with pulmonary dysfunction after lung resection

Area of Science:

• Cardiology
• Pulmonology
• Neurosurgery

Background:

• Lung resection surgery can impact patient oxygenation.
• Pulmonary dysfunction poses risks during and after major surgery.
• Jugular bulb oxygen saturation (SjvO₂) is a key indicator of cerebral oxygen delivery.

Purpose of the Study:

• To investigate the effects of lung resection on SjvO₂.
• To assess changes in pulmonary function and cerebral blood flow equivalent (CBFE).
• To determine the incidence of critical SjvO₂ levels (<50%) post-surgery in patients with varying pulmonary dysfunction.

Main Methods:

• Fifty-three patients undergoing lung resection were categorized by forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV₁).
• Groups included good, mild, moderate, and severe pulmonary dysfunction.
• Postoperative measurements included SjvO₂, CBFE, FEV₁, FVC, and arterial to jugular difference in oxygen content (AjvDO₂).

Main Results:

• Patients with pulmonary dysfunction experienced significantly lower SjvO₂, CBFE, FEV₁, and FVC post-lung resection.
• Higher AjvDO₂ and increased frequency of SjvO₂ < 50% were observed in these patients.
• Perioperative changes in FEV₁ showed a significant negative correlation with SjvO₂ desaturation.

Conclusions:

• Lung resection is associated with reduced SjvO₂ in patients with moderate to severe pulmonary dysfunction.
• Pulmonary dysfunction increases the risk of critical hypoxemia after lung resection.
• FEV₁ changes are a predictor of SjvO₂ desaturation following lung resection.