What is the role of supplemental oxygen in chest tube management?

• A. Increases the risk of infection
• B. Has no effect on pleural air or oxygenation
• C. Improves oxygenation and can help promote reabsorption of air; maintains adequate oxygen levels
• D. Is always contraindicated in pneumothorax

Answer: (C)

Supplemental oxygen in chest tube management serves two main purposes: it improves oxygenation and it helps speed the reabsorption of pleural air. In a pneumothorax, the gas in the pleural space is mostly nitrogen. Breathing high-concentration oxygen lowers the nitrogen partial pressure in the blood and alveoli, creating a stronger gradient for nitrogen to diffuse from the pleural space into the bloodstream and be exhaled. This accelerates air reabsorption, helping the pneumothorax resolve more quickly, while still ensuring tissues receive adequate oxygen. So, oxygen helps keep oxygen levels up and can promote quicker air clearance from the pleural space. It does not increase infection risk, is not contraindicated in pneumothorax, and it does affect both oxygenation and air resorption.