Simini Boards Cast
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Simini Boards Cast
Chapter 112 - Part D: When Blood Supply Dies: Trauma, Strangulation, and Penile Necrosis
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In this BoardsCast episode, we continue Tobias Chapter 112 — Penis and Prepuce with the most unforgiving truth in urogenital trauma:
The penis survives on flow. Blood in. Blood out. Urine through.
Lose one — and the clock starts.
This isn’t “surface trauma.” It’s a mechanical failure cascade:
Flow lost → pressure rises → perfusion fails → tissue dies.
We break down why venous outflow collapses first (thin, low-pressure veins), while arterial inflow keeps pumping—turning the penis into a compartment syndrome time bomb. Then we add the second killer: urethral compromise (rupture, extravasation, obstruction), where urine becomes a chemical injury that accelerates swelling and necrosis.
You’ll learn:
- Why penile trauma is usually vascular collapse + urinary plumbing failure
- Strangulation mechanics (rubber bands/hair rings/paraphimosis): venous blockade first → rapid necrosis
- Urethral rupture: swelling isn’t edema — it’s urine extravasation
- Os penis fractures: bone can crush the urethra → obstruction
- The decision line: viable tissue vs dead tissue (preserve vs salvage)
- Why end-stage cases become plumbing surgery: partial amputation/urethrostomy when tissue is nonviable
Key takeaway: If circulation stops or urine can’t pass, you don’t “watch it.” You act.
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