A 29-year-old woman, estimated to be at 34 weeks gestation, is brought to the emergency department following a high-speed motor vehicle collision. Paramedics report she was an unrestrained driver and was found unresponsive at the scene. Upon arrival, her Glasgow Coma Scale score is 6. Vital signs include a heart rate of 148/min, blood pressure of 65/35 mm Hg, respiratory rate of 6/min with agonal gasps, and oxygen saturation of 82% on room air. There is no active external hemorrhage visible. She is currently lying supine on the resuscitation bay stretcher. Arrange the following critical management steps in the most appropriate sequential order for this patient's initial stabilization and triage.
- 1Secure the airway via endotracheal intubation
- 2Perform manual leftward displacement of the pregnant uterus
- 3Administer uncrossmatched group O, Rh-negative packed red blood cells
- 4Perform a Focused Assessment with Sonography for Trauma (FAST) examination
- 5Transport the patient to the operating room for exploratory laparotomy
Answer
The correct sequence is: Endotracheal intubation, followed by manual leftward displacement of the uterus, administration of group O Rh-negative blood, FAST examination, and finally transport to the operating room.
The Advanced Trauma Life Support (ATLS) primary survey strictly follows the airway, breathing, and circulation algorithm. For a pregnant patient in the third trimester, specialized physiological modifications are required. This patient requires immediate airway management due to her GCS of 6 and agonal gasps. Next, her profound hemorrhagic shock must be addressed. A critical modification for pregnant trauma patients is recognizing that supine positioning causes the gravid uterus to compress the inferior vena cava, decreasing cardiac output by up to 30%. Therefore, manual left uterine displacement must be performed immediately as part of circulatory stabilization, even before or concurrently with initiating massive transfusion protocols. Because she is a female of childbearing age, uncrossmatched blood must be group O, Rh-negative to prevent alloimmunization. Only after these primary stabilization steps are initiated should secondary diagnostic adjuncts like the FAST exam be performed to locate the source of bleeding, which ultimately dictates the need for definitive operative management.
Step-by-Step Solution
Key Concept
Prioritization of trauma resuscitation in late-term pregnancy involves strict adherence to the primary survey with vital physiological modifications (Airway → Relief of aortocaval compression → Volume resuscitation → Diagnostics → Definitive Surgery).