A 35-year-old woman is brought to the trauma bay after being struck by a motorcycle. She is alert and oriented, with blood pressure 118/76 mmHg, heart rate 88 bpm, and respiratory rate 18/min. On examination, there is mild left upper quadrant tenderness without peritoneal signs. FAST examination reveals a small amount of free fluid in the left paracolic gutter only. Her hemoglobin is 13.8 g/dL. After 30 minutes of observation and repeat vital signs remain stable, what is the most appropriate management?

Explanation

## Clinical Assessment **Key Point:** This patient is hemodynamically stable with a positive FAST but minimal clinical findings. In stable patients with positive FAST, CT imaging is the gold standard to identify the source of bleeding and guide selective (non-operative) management. ## Selective Management in Blunt Abdominal Trauma **High-Yield:** The modern approach to blunt abdominal trauma emphasizes **selective (non-operative) management** in hemodynamically stable patients, even with positive FAST findings. This requires: 1. Hemodynamic stability (SBP ≥ 90 mmHg, HR <120 bpm) 2. Absence of peritoneal signs 3. Reliable patient (able to report deterioration) 4. Available ICU/high-dependency unit 5. Immediate access to OR if deterioration occurs ## Role of CT in Stable Patients **Clinical Pearl:** CT scan with IV contrast is essential to: - Identify the organ injured (liver, spleen, kidney, pancreas) - Grade the injury (I–V) - Detect active bleeding (contrast extravasation) - Identify other injuries (mesenteric, diaphragmatic) - Guide angiographic embolization if needed ## Management Algorithm ```mermaid flowchart TD A[Blunt Abdominal Trauma]:::outcome --> B{Hemodynamically Stable?}:::decision B -->|No| C[Laparotomy]:::action B -->|Yes| D{Peritoneal Signs?}:::decision D -->|Yes| C D -->|No| E[FAST Positive?]:::decision E -->|No| F[Discharge/Observation]:::action E -->|Yes| G[CT Abdomen/Pelvis]:::action G --> H{Active Bleeding or Grade IV-V?}:::decision H -->|Yes| I[Angiographic Embolization ± Laparotomy]:::action H -->|No| J[Non-operative Management with ICU Admission]:::action ``` ## Mnemonic: STABLE + FAST = CT **STABLE** patient with **FAST**-positive free fluid → **CT** imaging for selective management ## Comparison: Stable vs. Unstable FAST-Positive Patients | Parameter | Hemodynamically Stable | Hemodynamically Unstable | |-----------|------------------------|-------------------------| | FAST positive | CT scan | Laparotomy | | Peritoneal signs | Laparotomy | Laparotomy | | Next step | Selective management | Hemorrhage control | | ICU admission | Yes (observation) | Yes (post-op) | **Warning:** Do not discharge a FAST-positive patient home. Even small amounts of free fluid warrant imaging to exclude significant injury. [cite:ATLS 10th Edition; Sabiston Ch 21]