A 72-year-old woman is admitted with acute abdomen. CT scan shows a small bowel loop herniated through the femoral canal with transition point at the femoral ring. The bowel appears viable with no free fluid. She is hemodynamically stable and tolerating oral intake. What is the most appropriate next step in management?

Explanation

## Management of Femoral Hernia with Incarceration **Key Point:** Any incarcerated femoral hernia requires urgent surgical repair, regardless of current hemodynamic stability or viability appearance on imaging. The risk of strangulation is too high to delay intervention. **High-Yield:** Femoral hernias have a 40% incarceration rate and 10–20% risk of strangulation. Once incarcerated, the narrow femoral ring acts as a tourniquet, and ischemic changes can develop rapidly. Imaging cannot reliably exclude early strangulation. ### Why Surgery Is Mandatory | Feature | Femoral Hernia | Inguinal Hernia | |---------|---|---| | Incarceration rate | 40% | 10% | | Strangulation risk | 10–20% | 5% | | Anatomical constraint | Rigid femoral ring (narrow) | More distensible inguinal ring | | Management if incarcerated | **Urgent surgery** | Conservative trial acceptable in select cases | **Clinical Pearl:** The femoral canal is bounded by: - **Superiorly:** Inguinal ligament - **Medially:** Lacunar ligament (Cooper's ligament) - **Laterally:** Femoral vein - **Posteriorly:** Pectineal fascia This rigid anatomy prevents spontaneous reduction and makes strangulation inevitable if not relieved promptly. ### Surgical Approach Decision ```mermaid flowchart TD A[Incarcerated Femoral Hernia]:::outcome --> B{Strangulation Signs?}:::decision B -->|Yes - fever, peritonitis| C[Emergency Surgery]:::urgent B -->|No - viable bowel on CT| D[Urgent Surgery within 6 hrs]:::action C --> E{Approach?}:::decision D --> E E -->|Uncomplicated case| F[Low approach - Lockwood]:::action E -->|Need bowel assessment| G[McEvedy approach or laparotomy]:::action F --> H[Assess bowel viability]:::action G --> H H --> I{Viable?}:::decision I -->|Yes| J[Simple repair]:::action I -->|No| K[Resect + Repair]:::action ``` **Why NOT Conservative Management:** - Femoral hernias cannot be reliably reduced manually due to rigid femoral ring - Imaging may underestimate strangulation (CT sensitivity ~70–80%) - Delay increases risk of bowel necrosis, perforation, and sepsis - Even "viable" bowel on imaging can deteriorate within hours **Why NOT Manual Reduction:** - Risk of reducing gangrenous bowel back into peritoneal cavity ("reduction en masse") - Femoral ring is too narrow and rigid for successful manual reduction - Delays definitive surgical treatment **Surgical Approaches for Femoral Hernia:** 1. **Low approach (Lockwood)** — below inguinal ligament, direct access to femoral canal 2. **McEvedy approach** — medial to femoral vessels, allows better bowel assessment 3. **Open laparotomy** — if strangulation suspected or bowel resection needed **Mnemonic — Femoral Hernia Surgery Indications: "URGENT"** - **U**ncomplicated incarceration → urgent surgery - **R**igid femoral ring (cannot reduce manually) - **G**angrenous risk (10–20% strangulation) - **E**arly intervention prevents perforation - **N**o role for conservative trial - **T**ime is bowel [cite:Sabiston Textbook of Surgery Ch 43]