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Difficulty: HardTrauma and Burns

Emergency medical responders transport a 46-year-old pedestrian to the acute resuscitation area after he was struck by a sport utility vehicle. Upon arrival, the patient is unresponsive with a Glasgow Coma Scale score of 6. His blood pressure is 76/40 mmHg, heart rate is 138/min, and respiratory rate is 28/min. The right pupil is 6 mm and unreactive to light, while the left pupil is 3 mm and reactive. Physical examination reveals massive bruising over the left lower chest and a distended, tense abdomen. A portable chest radiograph shows left-sided rib fractures without pneumothorax or hemothorax. A focused assessment with sonography for trauma (FAST) demonstrates a large amount of anechoic fluid in the splenorenal and hepatorenal recesses. The patient is rapidly intubated and receives 1 unit of uncrossmatched type O-negative blood, after which his blood pressure remains 78/42 mmHg. Which of the following is the most appropriate next step in the management of this patient?

  1. Immediate exploratory laparotomyAnswer
  2. B
    Computed tomography of the head, cervical spine, and abdomen
  3. C
    Diagnostic peritoneal lavage
  4. D
    Endovascular angiography with targeted embolization
  5. E
    Defer operative intervention until next-of-kin provides informed consent

Answer

Immediate exploratory laparotomy
The correct answer is immediate exploratory laparotomy. This patient is in class IV hemorrhagic shock, evidenced by profound hypotension and tachycardia that remain refractory to initial blood transfusion. The positive FAST exam localizes the source of this exsanguinating hemorrhage to the abdomen. According to Advanced Trauma Life Support (ATLS) principles, patients with hemodynamic instability and intraperitoneal fluid must undergo emergent exploratory laparotomy to surgically control the bleeding. While the patient has a fixed, dilated pupil indicating likely uncal herniation from a traumatic brain injury (TBI), the immediate threat to life is circulatory collapse. Definitive management of the C (Circulation) phase must precede the D (Disability) diagnostic workup. Neurosurgical interventions, such as placing an intracranial pressure monitor or performing a decompressive craniectomy, can be performed concurrently in the operating room, but the patient cannot safely go to the CT scanner while actively exsanguinating.

Step-by-Step Solution

1
Evaluate the patient's hemodynamic status and primary survey findings.
The patient is in profound hemorrhagic shock (BP 76/40 mmHg) that is unresponsive to initial fluid and blood resuscitation.
Determining hemodynamic stability is the critical branch point in trauma management algorithms.
2
Interpret the results of the FAST examination.
The FAST scan is grossly positive in multiple dependent intra-abdominal areas.
A positive FAST in the setting of instability localizes the source of exsanguinating hemorrhage to the peritoneal cavity.
3
Reconcile competing clinical priorities (intra-abdominal bleeding vs. traumatic brain injury signs).
Prioritize surgical control of the bleeding (Circulation) over definitive diagnostic imaging of the brain (Disability).
ATLS protocols mandate addressing imminent threats to life in alphabetical order; exsanguination will cause cardiac arrest before a head CT can alter neurological management.
4
Select the definitive intervention.
Immediate transfer to the operating room for an exploratory laparotomy.
Surgical hemostasis is the only definitive treatment for unstable intraperitoneal hemorrhage.

Key Concept

Hemodynamically unstable trauma patients with a positive FAST scan require immediate exploratory laparotomy, even in the presence of focal neurologic deficits indicating severe traumatic brain injury.
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Topics

Trauma and Burns

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