ATLS - Advanced Trauma Life Support Trauma in Special Populations Questions and Answers

Question 1

An 82-year-old female is brought to the trauma center after a ground-level fall. She is on warfarin for atrial fibrillation and metoprolol for hypertension. Her blood pressure is 110/70 mmHg, heart rate is 80 bpm, and she is lethargic. What is the most appropriate interpretation of her vital signs?

Accepted Answer

The patient is likely in compensated shock, masked by the effects of her beta-blocker medication.

Answer

Geriatric patients often have a blunted physiological response to trauma. Beta-blockers, like metoprolol, prevent the tachycardic response to hypovolemia. A 'normal' heart rate in this context can mask significant blood loss and compensated shock. Lethargy is a key sign of hypoperfusion. Therefore, despite seemingly acceptable vital signs, this patient should be considered to be in shock until proven otherwise.

Question 2

A 28-year-old female who is 30 weeks pregnant is the restrained driver in a motor vehicle collision. Her initial vital signs are stable. An arterial blood gas (ABG) is obtained, which shows a PaCO2 of 40 mmHg. Which of the following is the correct interpretation of this finding?

Accepted Answer

This indicates impending respiratory failure.

Answer

Due to hormonal changes (progesterone), pregnant patients have an increased minute ventilation, leading to a chronic compensated respiratory alkalosis. Their normal baseline PaCO2 is typically 28-32 mmHg. A PaCO2 of 40 mmHg, which is normal for a non-pregnant patient, indicates relative hypoventilation and CO2 retention in a pregnant patient, signaling impending respiratory failure.

Question 3

A 4-year-old child weighing 18 kg is rescued from a house fire with second-degree burns over both full legs. The child is tachycardic and has a delayed capillary refill. According to ATLS principles, what is the most appropriate initial fluid bolus?

Accepted Answer

360 mL of Lactated Ringer's solution.

Answer

The standard initial fluid bolus for a pediatric trauma patient in shock is 20 mL/kg of a warmed isotonic crystalloid. For an 18 kg child, this calculation is 20 mL/kg * 18 kg = 360 mL. Blood products, if needed, are typically given as a 10 mL/kg bolus after initial crystalloid resuscitation fails to improve perfusion.

Question 4

During the primary survey of a 26-year-old female who is 24 weeks pregnant and immobilized on a backboard, she suddenly becomes hypotensive and lightheaded. Which of the following is the most critical immediate intervention?

Accepted Answer

Manually displace the uterus to the left side.

Answer

After 20 weeks of gestation, the gravid uterus can compress the inferior vena cava when the patient is in the supine position, leading to decreased venous return and subsequent hypotension (supine hypotensive syndrome). The most important immediate intervention is to relieve this compression by manually displacing the uterus to the left or tilting the entire backboard 15-30 degrees to the left.

Question 5

An 8-year-old boy falls off his bicycle, striking the handlebars with his abdomen. He initially complains of mild pain but is now pale and tachycardic. A FAST exam is positive for fluid in the splenorenal space. Which organ is most likely injured?

Accepted Answer

Spleen

Answer

In pediatric blunt abdominal trauma, solid organs are more frequently injured than in adults due to a more compliant rib cage, less protective abdominal musculature, and proportionally larger organs. The spleen is the most commonly injured organ in this setting, followed by the liver. Handlebar injuries are a classic mechanism for both splenic and pancreatic injuries, but the positive FAST exam points strongly toward a solid organ laceration with hemoperitoneum.

ATLS - Advanced Trauma Life Support Practice Test

ATLS - Advanced Trauma Life Support Practice Test

ATLS - Advanced Trauma Life Support Trauma in Special Populations Questions and Answers