A 32-year-old man sustains blunt abdominal trauma in a motor vehicle collision. On examination, he is haemodynamically stable with a soft abdomen and no peritoneal signs. FAST scan shows free fluid in the pelvis. CT abdomen reveals a grade III splenic laceration with active bleeding but no other solid organ injury. Which finding best distinguishes this patient from one requiring immediate laparotomy?

Explanation

## Discriminating Feature: Haemodynamic Stability ### Key Concept **Key Point:** The decision to perform laparotomy in blunt abdominal trauma depends primarily on **haemodynamic stability**, not imaging findings alone. This patient's stable vital signs allow for non-operative management (NOM) despite active bleeding on imaging. ### ATLS Principles for Blunt Abdominal Trauma | Finding | Haemodynamically Stable | Haemodynamically Unstable | |---------|------------------------|---------------------------| | **Management** | Non-operative management (NOM) with ICU/HDU monitoring | Immediate laparotomy | | **FAST positive + free fluid** | Observe, serial exams, CT if stable | Indication for surgery | | **Active bleeding on CT** | Permissible if vitals maintained | Absolute indication for OR | | **Monitoring** | Serial clinical exams, repeat imaging PRN | Continuous resuscitation | ### Why This Patient Avoids Laparotomy 1. **Haemodynamic stability** allows time for selective non-operative management (SNOM) 2. **Grade III splenic laceration** is amenable to conservative management in stable patients [cite:ATLS 10e] 3. **FAST-positive fluid** without hypotension does not mandate surgery 4. **ICU/HDU admission** with continuous monitoring, ready access to OR, and transfusion capability enables safe NOM ### Clinical Pearl **Clinical Pearl:** Modern trauma practice favours SNOM in haemodynamically stable patients with blunt solid organ injury, even with active bleeding on CT, provided: - Continuous monitoring available - Rapid access to OR if deterioration occurs - Adequate blood products on hand - Surgeon at bedside for serial exams ### High-Yield Mnemonic **Mnemonic:** **STABLE = SNOM** (Stable patient = Selective Non-Operative Management) [cite:ATLS 10e] ### Indications for Laparotomy in Blunt Abdominal Trauma ```mermaid flowchart TD A[Blunt abdominal trauma]:::outcome --> B{Haemodynamically stable?}:::decision B -->|No| C[Immediate laparotomy]:::urgent B -->|Yes| D{FAST positive or peritoneal signs?}:::decision D -->|No| E[Observe, serial exams]:::action D -->|Yes| F{CT available & patient stable?}:::decision F -->|Yes| G[CT abdomen/pelvis]:::action F -->|No| H[Laparotomy]:::urgent G --> I{Solid organ injury?}:::decision I -->|Yes| J[ICU/HDU SNOM]:::action I -->|No| K{Hollow viscus injury?}:::decision K -->|Yes| L[Laparotomy]:::urgent K -->|No| M[Observe]:::action ```