A 58-year-old man with a long-standing left inguinal hernia presents to the emergency department with acute onset severe pain in the groin for 6 hours, associated with vomiting and abdominal distension. On examination, the hernia is tense, tender, and irreducible. Abdominal examination reveals distension with visible peristalsis. Blood pressure is 100/65 mmHg, heart rate 112/min, and temperature 38.2°C. Laboratory investigations show WBC 14,500/µL, serum lactate 4.2 mmol/L, and serum creatinine 1.8 mg/dL. What is the most appropriate immediate management?

Explanation

## Clinical Diagnosis: Strangulated Inguinal Hernia **Key Point:** The combination of irreducible hernia, acute severe pain, vomiting, abdominal distension, tachycardia, fever, elevated lactate, and leukocytosis indicates **strangulation** — not simple obstruction. ### Distinguishing Obstruction vs. Strangulation | Feature | Simple Obstruction | Strangulation | |---------|-------------------|----------------| | **Pain onset** | Gradual | Acute, severe | | **Hernia reduction** | May be possible | Irreducible | | **Systemic signs** | Mild/absent | Fever, tachycardia, shock | | **Lactate** | Normal | Elevated (tissue ischemia) | | **Peritoneal signs** | Absent | Present (tenderness, guarding) | | **Management** | Initial conservative trial | **Immediate surgery** | **High-Yield:** Strangulation is a **surgical emergency**. Delayed intervention risks bowel necrosis, perforation, peritonitis, and septic shock. Mortality increases significantly after 6–8 hours of strangulation. ### Immediate Management Algorithm ```mermaid flowchart TD A[Acute irreducible hernia + systemic toxicity]:::outcome --> B{Signs of strangulation?}:::decision B -->|Fever, tachycardia, elevated lactate, peritoneal signs| C[Strangulation]:::urgent B -->|Absent| D[Simple obstruction]:::outcome C --> E[Resuscitate: IV fluids, NG tube, antibiotics]:::action D --> F[Trial of conservative management]:::action E --> G[Urgent surgical exploration]:::action G --> H{Bowel viability?}:::decision H -->|Viable| I[Hernia repair]:::action H -->|Necrotic| J[Resection + repair]:::action F --> K{Resolves in 24-48 hrs?}:::decision K -->|Yes| L[Elective repair in 2-4 weeks]:::action K -->|No| G ``` **Clinical Pearl:** Serum lactate >2 mmol/L in the setting of an acute hernia is a red flag for intestinal ischemia and mandates immediate surgery. Do NOT attempt manual reduction in strangulated hernias — risk of perforation and bacteremia. **Mnemonic — STRANGULATION RED FLAGS:** **S**evere pain, **T**ense hernia, **R**educed blood supply (lactate ↑), **A**cute onset, **N**ausea/vomiting, **G**uarding, **U**nreducible, **L**eukocytosis, **A**bdominal distension, **T**achycardia, **I**rreversible (if delayed), **O**bstruction, **N**eeds emergency surgery. **Tip:** The presence of fever (38.2°C) + elevated lactate + irreducibility = **strangulation until proven otherwise**. Do not waste time with imaging or conservative measures.