A 32-year-old man is brought to the emergency department following a high-speed motor vehicle collision. He was the driver and hit a tree at 80 km/h. On arrival, his blood pressure is 88/56 mmHg, heart rate 128 bpm, respiratory rate 24/min, and he is alert but anxious. His abdomen is distended with bruising over the left flank. FAST examination shows free fluid in the peritoneal cavity. Hemoglobin is 9.2 g/dL (baseline unknown). What is the most appropriate immediate management?

Explanation

## Clinical Assessment This patient presents with **hemorrhagic shock Class III** (systolic BP 70–90 mmHg, HR >120 bpm, altered mental status trending toward confusion, pale/anxious). The mechanism (high-speed MVC), physical findings (abdominal distension, left flank bruising), and FAST-positive free fluid indicate **intra-abdominal hemorrhage**, most likely from splenic or renal injury. ## Immediate Management Rationale **Key Point:** In hemorrhagic shock Class III–IV with confirmed intra-abdominal bleeding, **damage control resuscitation (DCR)** is the standard of care. This prioritizes: 1. **Permissive hypotension** (target SBP 90–100 mmHg) to minimize ongoing bleeding 2. **Immediate blood product availability** (O-negative or type-specific) 3. **Rapid surgical intervention** (laparotomy) to achieve hemostasis **High-Yield:** The ATLS guideline for Class III–IV shock with suspected intra-abdominal hemorrhage is **"Treat first, image second."** Delay for CT imaging is contraindicated in unstable patients with positive FAST. ## Why This Answer - **Two units O-negative blood** are initiated immediately (DCR protocol; 1:1:1 RBC:FFP:platelets ratio in massive transfusion) - **Two large-bore IVs** (14–16 gauge) enable rapid fluid/blood administration - **Emergency laparotomy** is the definitive intervention for hemorrhage control in Class III shock with FAST-positive findings - Avoids delays inherent in CT imaging, which is contraindicated in unstable patients ## Table: Hemorrhagic Shock Classification | Class | BP (mmHg) | HR (bpm) | RR | Mental Status | Blood Loss (%) | |-------|-----------|----------|-----|---------------|----------------| | I | >100 | <100 | 12–20 | Normal | <15% | | II | >100 | 100–120 | 20–30 | Anxious | 15–30% | | III | 70–90 | >120 | 30–40 | Confused | 30–40% | | IV | <70 | >140 | >40 | Lethargic/comatose | >40% | **Clinical Pearl:** A FAST-positive exam in a hemodynamically unstable patient is an **indication for immediate surgical exploration**, not further imaging. Delay increases mortality. [cite:ATLS 10th Edition]