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Difficulty: MediumInitial Stabilization and Triage

A 28-year-old woman is brought to the emergency department by her sister after collapsing at home. The sister reports that the patient complained of sudden, severe lower abdominal pain right before losing consciousness. The patient's last menstrual period was approximately 7 weeks ago. On arrival, she is lethargic, diaphoretic, and extremely pale. Vital signs are temperature 36.6°C (97.9°F), heart rate 145/min, blood pressure 68/38 mm Hg, respiratory rate 24/min, and oxygen saturation 98% on ambient air. Physical examination reveals a rigid, distended abdomen with diffuse guarding and rebound tenderness. Capillary refill is delayed at 5 seconds. Which of the following interventions should be ordered simultaneously as the most appropriate initial stabilization steps? (Select all that apply)

  1. Establish two large-bore peripheral intravenous cathetersAnswer
  2. Initiate rapid transfusion of uncrossmatched type O-negative bloodAnswer
  3. C
    Administer continuous intravenous norepinephrine
  4. D
    Transfer to the radiology suite for a formal pelvic ultrasound
  5. E
    Insert a central venous catheter for rapid volume resuscitation

Answer

The most urgent simultaneous initial stabilization steps are establishing two large-bore peripheral intravenous catheters and initiating rapid transfusion of uncrossmatched type O-negative blood.
This patient is presenting with severe hemorrhagic shock, most likely due to a ruptured ectopic pregnancy given her missed menstrual period, sudden severe abdominal pain, and profound hypotension. In the setting of hemorrhagic shock, immediate stabilization requires maximizing intravascular volume and oxygen delivery. According to Poiseuille's law, the fastest way to deliver large volumes of fluid is through short, large-diameter catheters; therefore, establishing two large-bore (e.g., 14- or 16-gauge) peripheral intravenous lines is the preferred initial access. Because she is in class IV hemorrhagic shock, crystalloid alone is insufficient and can exacerbate coagulopathy. Initiating rapid transfusion of uncrossmatched type O-negative blood is necessary to immediately restore both intravascular volume and oxygen-carrying capacity.

Step-by-Step Solution

1
Assess the patient's hemodynamic status and presenting symptoms.
The patient is in profound shock (blood pressure 68/38 mm Hg, heart rate 145/min) with a rigid abdomen and a history of a missed period, highly suggestive of a ruptured ectopic pregnancy.
Identifying the etiology of shock (hemorrhagic) dictates the immediate resuscitation priorities.
2
Determine the optimal route and fluid for rapid hemodynamic resuscitation.
Two large-bore peripheral intravenous lines should be placed, and uncrossmatched type O-negative blood should be transfused immediately.
In massive hemorrhage, large-bore peripheral access allows the fastest volume delivery, and early blood transfusion is required to restore oxygen-carrying capacity.

Key Concept

In patients presenting with undifferentiated hemorrhagic shock, the immediate stabilization priority is securing large-bore peripheral intravenous access and initiating rapid transfusion of uncrossmatched blood, prior to definitive diagnostic studies or central line placement.
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Topics

Initial Stabilization and Triage

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