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Difficulty: MediumPulmonary and Critical Care

A 4545-year-old man is receiving mechanical ventilation in the intensive care unit for acute respiratory distress syndrome (ARDS). The ventilator alarm suddenly sounds for high peak airway pressures. The patient's blood pressure drops abruptly from 110/70110/70 mm Hg to 70/4070/40 mm Hg, and his oxygen saturation falls to 82%82\%. Physical examination reveals absent breath sounds on the right side, hyperresonance to percussion, and the trachea is deviated to the left. Arrange the following interventions in the most appropriate chronological order to manage this acute life-threatening event.

  1. 1Disconnect the patient from the ventilator and initiate manual bag-valve-mask ventilation with 100%100\% oxygen.
  2. 2Perform an emergent needle or finger thoracostomy in the right hemithorax.
  3. 3Insert a large-bore tube thoracostomy in the right hemithorax.
  4. 4Obtain a portable chest radiograph to confirm lung re-expansion and tube placement.

Answer

The correct sequence is to first disconnect the patient from the ventilator and manually ventilate, followed by emergent pleural decompression (needle/finger thoracostomy), then placement of a definitive tube thoracostomy, and finally obtaining a confirmatory chest radiograph.
The correct sequence reflects the standard resuscitation algorithm for a mechanically ventilated patient who develops a tension pneumothorax (e.g., secondary to barotrauma). The sudden onset of obstructive shock, high peak pressures, and unilateral chest findings are diagnostic. The initial step is disconnecting the ventilator and manually ventilating to bypass potential equipment failure and provide maximal oxygenation. Because the patient is hemodynamically unstable, emergent pleural decompression (needle or finger thoracostomy) must be performed immediately. Once the tension is relieved, a definitive tube thoracostomy is placed. Only after these life-saving therapeutic steps are completed is a portable chest radiograph obtained.

Step-by-Step Solution

1
Identify the cause of acute decompensation.
The clinical presentation of hypotension, unilateral absent breath sounds, tracheal deviation, and high peak pressures indicates a right-sided tension pneumothorax.
Positive pressure ventilation in ARDS increases the risk of barotrauma.
2
Disconnect the ventilator and manually ventilate.
Provides 100%100\% oxygen and allows the physician to feel lung compliance.
This is the universal first step for crashing ventilated patients to rule out circuit issues.
3
Decompress the pleural space emergently.
Needle or finger thoracostomy converts the tension pneumothorax to a simple pneumothorax.
Obstructive shock will rapidly lead to cardiac arrest if venous return is not immediately restored; imaging must not delay this step.
4
Place a definitive chest tube and confirm placement.
Tube thoracostomy is placed, followed by a portable chest X-ray.
A chest tube is required for continuous air evacuation, and X-ray confirms successful re-expansion.

Key Concept

Sequential management of Tension Pneumothorax in mechanically ventilated patients
Estimated Time:1m 0s
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Topics

Pulmonary and Critical Care

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