Coroner's Finding: Scott, Douglas Ian

81y · Male·Oxygen deprivation and carbon dioxide toxicity in a person with chronic respiratory insufficiency, resulting from smoking while using an oxygen concentrator

Douglas Ian Scott, an 81-year-old with emphysema, died from oxygen deprivation and carbon dioxide toxicity after smoking while using a home oxygen concentrator. He had been discharged from hospital with clear written and verbal warnings against using the device while smoking, which he acknowledged understanding. Despite his wife's repeated cautions, he continued smoking and ignored safety instructions. When he lit a cigarette while using the concentrator, the oxygen-enriched rubber nasal tubes ignited, causing him to inhale carbon dioxide from burning rubber while being deprived of oxygen. The death was entirely preventable had the patient followed explicit safety warnings provided at discharge. This case highlights the importance of patient education reinforcement, particularly for high-risk behaviours, and the critical need for patients to understand and comply with safety instructions for oxygen therapy.