Examkin

Question

Difficulty: Very hardInitial Stabilization and Triage

Following a high-speed frontal vehicular collision, a gravid 3030-year-old patient (estimated 3434 weeks gestation) is evaluated in the trauma resuscitation area. She was an unrestrained driver. Paramedics deliver her immobilized in a strict supine position on a spine board. She is extremely pale, restless, and describes a constant, tearing pain in her abdomen.

Vital signs demonstrate:
- Temperature: 36.2∘C36.2^\circ\text{C} (97.2∘F97.2^\circ\text{F})
- Blood pressure: 72/40 mmHg72/40\text{ mmHg}
- Heart rate: 138/min138/\text{min}
- Respiratory rate: 28/min28/\text{min}
- SpO2: 91%91\% on room air

Clinical evaluation shows collapsed neck veins and a midline trachea. Pulmonary auscultation reveals clear, symmetric breath sounds. Her abdomen is enlarged, hypertonic, and board-like with diffuse tenderness to palpation. A moderate amount of dark red blood is present at the vaginal introitus. Pelvic compression testing shows no mechanical instability.

Which of the following interventions should be implemented SIMULTANEOUSLY as part of the immediate initial stabilization for this patient? (Select 3)

  1. Manual leftward displacement of the gravid uterusAnswer
  2. Delivery of high-flow oxygen via a non-rebreather maskAnswer
  3. Rapid transfusion of uncrossmatched O-negative blood productsAnswer
  4. D
    Infusion of a vasoactive agent such as norepinephrine
  5. E
    Transfer to the obstetrics ward for definitive fetal monitoring

Answer

The correct immediate interventions are manual leftward displacement of the gravid uterus, delivery of high-flow oxygen, and rapid transfusion of uncrossmatched O-negative blood products.
The patient is presenting with severe hemorrhagic shock, likely secondary to placental abruption resulting from blunt abdominal trauma. The immediate priorities in a pregnant trauma patient include optimizing maternal hemodynamics and oxygenation, which directly dictate fetal survival. Manual leftward displacement of the gravid uterus relieves aortocaval compression, increasing venous return and cardiac output by up to 30%30\%. Delivery of high-flow oxygen maximizes maternal oxygen-carrying capacity to treat fetal hypoxia. Rapid transfusion of uncrossmatched O-negative blood products addresses the severe hypovolemia from massive hemorrhage. These three interventions represent the standard of care for initial simultaneous stabilization in this scenario.

Step-by-Step Solution

1
Identify the primary pathophysiologic process threatening the patient.
The patient is experiencing severe Class III/IV hemorrhagic shock, highly suspicious for placental abruption given the trauma, rigid abdomen, and vaginal bleeding.
Blunt trauma in late pregnancy frequently causes placental separation, leading to massive internal and external hemorrhage.
2
Determine the immediate stabilization priorities for a pregnant trauma patient in shock.
Address maternal hemodynamics and oxygenation while accounting for the physiologic changes of pregnancy.
Maternal survival and cardiovascular stability are the absolute prerequisites for fetal survival.
3
Select interventions that rapidly restore maternal perfusion and fetal oxygenation.
Displace the uterus to the left, administer high-flow oxygen, and initiate massive transfusion of O-negative blood.
The supine gravid uterus mechanically compresses the vena cava; blood replacement is essential for hemorrhagic shock; and oxygen maximizes fetal delivery during hypoperfusion.

Key Concept

Initial stabilization of the severely injured pregnant patient requires simultaneous treatment of hemorrhagic shock with blood products, optimization of venous return via left lateral uterine displacement, and maximization of oxygen carrying capacity, prioritizing maternal resuscitation over secondary fetal assessments.
Estimated Time:1m 30s
Rate this question

Topics

Initial Stabilization and Triage

More questions from this topic