Priapism — Management Pathway

Step-by-step decision

Choose step by step as prompted; reaching an endpoint gives the management recommendation. You can go back a step or restart anytime.

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Full pathway

1. [Decision] Ischemic or non-ischemic
   Ischemic or non-ischemic (blood gas/ultrasound)? (Erection >4 h unrelated to sexual activity. Ischemic (low-flow/veno-occlusive, 98%, a penile compartment syndrome, painful + rigid corpora with a soft glans, hypoxic/hypercapnic/acidotic blood gas) = a true emergency; non-ischemic (high-flow/arterial, usually traumatic, painless, normal blood gas). Diagnosis: corporal blood gas + Doppler ultrasound to distinguish (ultrasound before aspiration). Time-sensitive: >24 h ~90% ED, >48 h near-irreversible fibrosis.)
   • Ischemic (painful/rigid, hypoxic acidotic blood gas) → Ischemic → aspiration + phenylephrine
   • Non-ischemic (painless, arterial blood gas) → Non-ischemic · not an emergency
2. [End] Non-ischemic · not an emergency
   Non-ischemic (high-flow/arterial, usually perineal/penile trauma, painless, normal blood gas): not an emergency — observation (often resolves spontaneously), selective internal pudendal artery embolization if needed; aspiration is for diagnosis only, sympathomimetic injection is not recommended.
3. [End] Ischemic → aspiration + phenylephrine
   Ischemic (emergency, as soon as possible): dorsal penile nerve block for analgesia, treat the cause (sickle cell → hydration/exchange transfusion, but do not rely on systemic treatment alone); first-line: corporal aspiration ± saline irrigation + intracorporal phenylephrine (the preferred alpha-agonist, 100–500 mcg repeated every 3–5 minutes, with ECG monitoring); failure → surgical shunt; >48–72 h/refractory → consider early penile prosthesis.

Source guidelines & references

• Priapism (AUA/SMSNA guideline; EAU; Merck Manual)

This pathway is our own synthesis of the decision logic in the guidelines above (not the guideline verbatim); thresholds and workflows change as guidelines update — in practice follow the latest guideline, your institution's protocol and the individual patient.

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