SU28.{1-4,18} | Abdominal Wall and Peritoneal Conditions — Assignment

CLINICAL SCENARIO

A 68-year-old retired farmer presents to the surgical outpatient clinic with a right groin swelling that has been present for two years but has recently become larger and uncomfortable. The lump appears when he stands or coughs and disappears when he lies flat. He has a chronic cough from years of smoking and strains to pass urine. On examination, a reducible swelling emerges above and medial to the pubic tubercle with a positive cough impulse; the testes are normal and there is no overlying erythema or tenderness. Two days later he returns to the emergency department: the lump is now tense, exquisitely tender, irreducible, the cough impulse is absent, and he has central colicky abdominal pain with bilious vomiting and absolute constipation.

1. Anatomical diagnosis and classification

State the most likely diagnosis at the first (outpatient) presentation and classify the hernia precisely. Explain how you would relate the swelling to the pubic tubercle and the inferior epigastric vessels to distinguish indirect from direct inguinal and from femoral hernia.

Guidance: Use the pubic tubercle (above-and-medial vs below-and-lateral) and the inferior epigastric vessels (lateral = indirect via the deep ring; medial = direct via Hesselbach's triangle). Comment on his predisposing factors (chronic cough, straining).

2. Pathophysiology and the components of the hernia

Describe the components of any hernia (sac, contents, coverings) as they apply here, and explain why a chronic cough and bladder-outflow straining predispose to herniation.

Guidance: Link raised intra-abdominal pressure and a patent/weak deep ring or posterior wall to sac formation. Note what structures could form the contents (bowel, omentum).

3. The acute deterioration: recognising strangulation

Analyse the change at the second presentation. Identify the complication, list the clinical features that confirm it, and explain the pathophysiological sequence from incarceration to strangulation to bowel ischaemia and obstruction.

Guidance: Map each new finding (tense, tender, irreducible, absent cough impulse, colicky pain, bilious vomiting, constipation) to the underlying process. Explain why this is a surgical emergency.

4. Investigation and resuscitation in the emergency setting

Outline the immediate investigations and resuscitation you would initiate, and justify each. State what you are looking for and how the results would change management.

Guidance: Consider FBC, electrolytes, lactate, group-and-save, erect chest/abdominal films or CT, IV fluids, NG decompression, analgesia, antibiotics. Tie resuscitation to operative timing.

5. Operative principles and assessment of bowel viability

Describe the operative principles for a strangulated inguinal hernia, including how you assess bowel viability intra-operatively and the criteria that mandate resection. Comment on the role of mesh in a contaminated/strangulated field.

Guidance: Cover release of the constricting neck, viability assessment (colour, sheen, peristalsis, mesenteric pulsation after warming), resection of non-viable bowel, and the principle of tension-free repair versus avoiding mesh if bowel is resected/field contaminated.

6. Counselling and prevention of recurrence

Summarise how you would counsel this patient (and what you would address pre-operatively) to reduce recurrence and future hernia risk.

Guidance: Address modifiable factors: smoking cessation for the cough, treating bladder-outflow obstruction/straining, weight, and realistic expectations about elective repair of reducible hernias to prevent strangulation.