## Clinical Assessment This patient presents with **hemodynamic instability** (persistent hypotension despite resuscitation), **peritoneal signs** (guarding, rebound), and **FAST-positive free fluid** in the setting of blunt abdominal trauma. These findings are **absolute indications for emergency laparotomy**. ## Key Point: **Hemodynamically unstable patients with blunt abdominal trauma and peritoneal signs require immediate surgical exploration.** Nonoperative management (NOM) is contraindicated when the patient fails to respond to initial resuscitation. ## ATLS Principles for Abdominal Trauma | Finding | Management | |---------|------------| | Stable + FAST-positive | Consider CT ± NOM | | Unstable + FAST-positive + peritoneal signs | **Emergency laparotomy** | | Unstable + no response to 2 units PRBC | Laparotomy | | Stable with improving vitals after fluids | CT imaging ± NOM | ## Why Laparotomy Now? 1. **Persistent hypotension** after 2 units PRBC + 2 L crystalloid = failure of initial resuscitation 2. **Peritoneal signs** (guarding, rebound) indicate intra-abdominal injury requiring surgical intervention 3. **FAST-positive** confirms hemoperitoneum 4. **Left upper quadrant tenderness** suggests splenic injury (most common solid organ injury in blunt trauma) ## Clinical Pearl: **The "unstable triad" of blunt abdominal trauma:** - Hypotension unresponsive to 2 units PRBC - Peritoneal signs - FAST-positive free fluid → **Mandates immediate laparotomy; no time for imaging.** ## High-Yield: Nonoperative management of blunt abdominal trauma is reserved for **hemodynamically stable** patients. Once instability develops or peritonitis is evident, operative exploration is the standard of care [cite:ATLS 10th Edition Ch 8]. 
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