Emergency Medicine · Urologic Emergencies
The facts most likely to be tested
Paraphimosis is a urologic emergency characterized by the inability to reduce a retracted foreskin over the glans penis.
The pathophysiology involves a constricting band of foreskin acting as a tourniquet, leading to venous congestion and edema of the glans.
Physical examination reveals a swollen, erythematous glans with a tight, circumferential ring of foreskin proximal to the corona.
Initial management requires manual reduction using firm, steady pressure to the glans while pulling the foreskin forward.
If manual reduction fails, osmotic agents like granulated sugar or hypertonic saline can be applied to reduce glans edema.
A dorsal slit procedure is the definitive surgical intervention indicated when manual reduction and osmotic therapy are unsuccessful.
Failure to promptly reduce the foreskin leads to arterial compromise, resulting in glans ischemia, necrosis, and gangrene.
Vignette unlocked
A 24-year-old uncircumcised male presents to the emergency department with severe penile pain and swelling. He reports that he retracted his foreskin for hygiene purposes several hours ago and has been unable to return it to its original position. On physical examination, the glans penis is edematous and dusky, and there is a tight, circumferential band of foreskin trapped behind the coronal sulcus. The patient has no history of diabetes or recent urinary tract infections.
What is the most appropriate initial management for this patient?
Manual reduction
The vignette describes classic paraphimosis, a urologic emergency where the first-line treatment is manual reduction to relieve the constricting band and restore blood flow.
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Etiology / Epidemiology
Occurs in uncircumcised or partially circumcised males when the foreskin is retracted and becomes trapped behind the corona.
Clinical Manifestations
Presents as a painful, swollen glans with a constricting band of foreskin; tourniquet effect is pathognomonic.
Diagnosis
Diagnosis is clinical; no imaging required. Focus on identifying the constricting ring.
Treatment
Immediate manual reduction is first-line; do not delay if ischemia is suspected.
Prognosis
Prompt reduction prevents gangrene and auto-amputation of the glans.
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Epidemiology & Etiology
Commonly seen in uncircumcised males following catheterization, cystoscopy, or sexual activity. It is an urologic emergency caused by the inability to return the retracted foreskin to its anatomical position. Failure to reduce leads to venous congestion and arterial compromise.
Pertinent Anatomy
The prepuce (foreskin) is a retractable fold of skin covering the glans. In paraphimosis, the narrow preputial orifice acts as a constricting band proximal to the corona.
Pathophysiology
Retraction behind the corona causes venous and lymphatic obstruction, leading to edema of the glans. This edema further tightens the preputial ring, creating a vicious cycle. If untreated, the increased pressure exceeds capillary perfusion, resulting in ischemia and eventual necrosis.
Clinical Manifestations
Patients present with a painful, erythematous, and edematous glans. The tourniquet effect is visible as a tight, constricting band of tissue proximal to the glans. Red flags include skin discoloration (dusky or black) indicating gangrene or tissue death.
Diagnosis
Diagnosis is clinical based on physical examination. No gold standard imaging is required. The provider must distinguish between simple edema and signs of irreversible ischemia.
Treatment
First-line management is manual reduction using firm, sustained pressure on the glans to reduce edema. If manual reduction fails, dorsal slit incision is the definitive surgical intervention. Contraindications include delaying reduction for imaging; do not attempt if the tissue is already necrotic.
Prognosis
Early intervention carries an excellent prognosis. Delayed treatment leads to gangrene, ulceration, and potential auto-amputation. Post-reduction, elective circumcision is often recommended to prevent recurrence.
Differential Diagnosis
Balanitis: inflammation of the glans without a constricting band
Balanoposthitis: inflammation of both glans and foreskin
Phimosis: inability to retract the foreskin (not an emergency)
Angioedema: generalized swelling without a constricting ring
Trauma: history of injury without the characteristic tourniquet effect