NCT05914285

Assessment of Salbutamol Effect on Arterial Oxygenation in COPD Patients During One-lung Ventilation

• Status: Active Not Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 90 (actual)
• Sponsor: Yonsei University · Academic / Other
• Sex: All
• Age: 40 Years – 80 Years
• Healthy volunteers: Not accepted

Summary

One-lung ventilation (OLV) is essential part of anesthesia during thoracic procedures. However, OLV induces a drastic increase of intrapulmonary shunt due to maintained pulmonary perfusion through the nonventilated lung, which may result in severe hypoxemia. Although the protective mechanisms of hypoxic pulmonary vasoconstriction favorably modulate pulmonary perfusion to the ventilated lung, the effect is attenuated in patients with history of chronic obstructive pulmonary disease (COPD), which alters compliance of the pulmonary artery. Salbutamol is a selective short-acting beta2-agonist and when inhaled during OLV, it acts selectively on the pulmonary vasculature reducing pulmonary vascular resistance of well-ventilated lung. We hypothesized that inhaled salbutamol would alleviate ventilation-perfusion mismatch during OLV of COPD patients, and aimed to assess the effects of salbutamol on oxygenation in these patients.

Conditions

• One-lung Ventilation
• Chronic Obstructive Pulmonary Disease

Interventions

Type	Name	Description
DRUG	5ml of inhaled normal saline	After the initiation of OLV, 5ml of normal saline is inhaled for 20 minutes using ultrasonic nebulizer, which is connected to the inspiratory limb of the ventilator system. Arterial blood gas analysis is performed 30 minutes after the completion of drug inhalation.
DRUG	2.5mg (2.5ml) of inhaled salbutamol and 2.5ml of inhaled normal saline	After the initiation of OLV, mixture of salbutamol 2.5mg and normal saline 2.5ml is inhaled for 20 minutes using ultrasonic nebulizer, which is connected to the inspiratory limb of the ventilator system. Arterial blood gas analysis is performed 30 minutes after the completion of drug inhalation.

Timeline

• Start date: 2023-04-25
• Primary completion: 2025-06-20
• Completion: 2025-07-21
• First posted: 2023-06-22
• Last updated: 2025-07-01

Locations

1 site across 1 country: South Korea