
CoROM cast. Wilderness, Austere, Remote and Resource-limited Medicine. 183-Harrison Steins MiM26 SIPE
Feb 20, 2026
A deep dive into swimming-induced pulmonary oedema, covering who gets it and why context like altitude and exertion matter. Case vignettes and field assessment steps bring the condition to life. Practical lung ultrasound techniques and immediate management actions are explained. Research findings, prevalence numbers, and thoughts on prevention and prophylaxis round out the conversation.
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SIPE Is Rare But Clinically Important
- Swimming-induced pulmonary oedema (SIPE) is rare with prevalence under 1% but context makes it important for austere clinicians.
- Harrison Steins emphasises that low incidence still warrants inclusion in differentials for open-water and expedition medicine.
Ironman Case With Ultrasound Positive and X-ray Negative
- A 27-year-old male at 5,000 ft dropped out of a half Ironman after cough and dyspnea with normal vitals and resolved within days.
- Point-of-care lung ultrasound showed multiple B-lines, but chest X-ray later was normal, illustrating transient SIPE features.
How Immersion Physiology Causes Pulmonary Edema
- Immersion, cold water and exertion shift blood centrally and raise pulmonary hydrostatic pressures causing alveolar fluid leak.
- Steins links reduced peripheral pool, increased cardiac output and cold-induced vasoconstriction to SIPE pathophysiology.
