When assessing a patient, which sign or symptom is most indicative of a pneumothorax?

Question

Quizplus · Accepted Answer

Decreased breath sounds to one side of the lung can indicate a collapsed lung or pneumothorax. Intense pain with each inspiration may also be present, but this symptom is not as specific to pneumothorax as decreased breath sounds. A low SpO2 reading on high-concentration oxygen and crepitus/instability to the chest wall are not necessarily indicative of pneumothorax.

When Assessing a Patient, Which Sign or Symptom Is Most