Postoperative Oxygen Therapy in Patients With OSA: A Randomized Controlled Trial

Area of Science:

• Anesthesiology and Sleep Medicine
• Critical Care and Perioperative Medicine

Background:

• Surgical patients with obstructive sleep apnea (OSA) face heightened risks of perioperative complications.
• Postoperative supplemental oxygen, while common, may worsen respiratory depression in OSA patients using opioids.

Purpose of the Study:

• To evaluate the impact of postoperative supplemental oxygen on arterial oxygen saturation (Sao2), sleep respiratory events, and carbon dioxide levels in patients with untreated OSA.

Main Methods:

• Randomized controlled trial involving 123 patients with an apnea-hypopnea index (AHI) > 5.
• Patients were assigned to receive oxygen (O2 group) or no oxygen (control group) for three postoperative nights.
• Primary outcomes included Sao2, sleep respiratory events, and transcutaneous carbon dioxide (PtcCO2) measurements.

Main Results:

• The O2 group showed significantly higher Sao2 and lower oxygen desaturation index on postoperative night 3.
• Patients receiving oxygen exhibited a decreased AHI, hypopnea index, and central apnea index.
• No significant difference in PtcCO2 levels was observed between the groups, despite a small percentage experiencing retention.

Conclusions:

• Postoperative supplemental oxygen effectively improves oxygenation and reduces respiratory event severity in OSA patients.
• Oxygen therapy did not elevate overall PtcCO2 levels but warrants monitoring for potential retention in a subset of patients.