A patient who was an unrestrained driver in a high-speed, head-on motor vehicle collision presents with dyspnea, tachycardia, hypotension, jugular venous distension, tracheal deviation to the left, and decreased breath sounds on the right side. What is the most likely diagnosis?

Tension pneumothorax

Cardiac tamponade

Simple pneumothorax

Ruptured diaphragm

Answer and Explanation

The Correct Answer is A

Rationale:
A. Tension pneumothorax is the most likely diagnosis. This life-threatening condition occurs when air enters the pleural space and cannot escape, leading to increasing intrathoracic pressure. Classic signs include dyspnea, tachycardia, hypotension, jugular venous distension (JVD), tracheal deviation away from the affected side, and decreased or absent breath sounds on the affected side. The patient’s trachea is deviated to the left, and breath sounds are diminished on the right, which is consistent with a right-sided tension pneumothorax. Immediate intervention, such as needle decompression followed by chest tube insertion, is required.

B. Cardiac tamponade presents with hypotension, JVD, and muffled heart sounds (Beck’s triad), but it does not typically cause tracheal deviation or unilateral decreased breath sounds.

C. Simple pneumothorax can cause dyspnea and decreased breath sounds, but it does not usually cause hypotension, JVD, or tracheal deviation, because intrathoracic pressure does not reach life-threatening levels.

D. Ruptured diaphragm may result in abdominal organs herniating into the chest, leading to respiratory distress, but it is rarely associated with tracheal deviation or JVD and usually presents with abdominal findings as well as decreased breath sounds.

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Correct Answer is D

Explanation

Rationale:
A. A urine output of 30 mL/hr and an elevated BUN indicate renal impairment, and a WBC of 1120 suggests leukopenia. While concerning, this represents organ dysfunction in one system, not multiple organ systems. MODS requires failure of two or more organ systems.

B. Upper GI bleeding with a low hematocrit reflects gastrointestinal compromise and blood loss, but alone it does not constitute multi-organ dysfunction.

C. Respiratory rate of 45/min, elevated PaCO2, and bilateral infiltrates indicate acute respiratory failure or ARDS, which is dysfunction of the pulmonary system. This represents single-organ failure, not MODS.

D. Elevated serum amylase and lipase (pancreatic injury), a serum creatinine of 3.8 mg/dL (renal failure), and a platelet count of 15,000 (hematologic dysfunction) indicate failure of multiple organ systems. This combination confirms multi-organ dysfunction syndrome (MODS), which typically involves dysfunction of two or more organ systems and is often seen in severe sepsis, trauma, or shock.

A. MAP = 53 B. MAP= 86 C. MAP = 73 D. MAP= 110

Correct Answer is C

Explanation

Rationale:

A. 53 mm Hg would indicate severe hypotension and does not match the calculation.
B. 86 mm Hg is higher than the calculated value and would suggest better perfusion than reflected by the BP provided.
C. A MAP of 73 mm Hg is the accurate calculation and is just above the minimum MAP of 65 mm Hg needed to maintain adequate organ perfusion.

To calculate mean arterial pressure (MAP), use the formula:

MAP = (Systolic BP + 2 × Diastolic BP) ÷ 3

Substitute the given values:
MAP = (100 + 2 × 60) ÷ 3
MAP = (100 + 120) ÷ 3
MAP = 220 ÷ 3
MAP ≈ 73 mm Hg
D. 110 mm Hg reflects systolic pressure, not MAP.

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A patient who was an unrestrained driver in a high-speed, head-on motor vehicle collision presents with dyspnea, tachycardia, hypotension, jugular venous distension, tracheal deviation to the left, and decreased breath sounds on the right side. What is the most likely diagnosis?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The development of MODS is confirmed in a patient who manifests

Correct Answer is D

Explanation

You are the RN caring for a multiple truama victim in the ICU. The patient's vital signs are as follows: BP: 100/60; HR: 110; RR 20. Calculate the mean arterial pressure.

Correct Answer is C

Explanation

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