Which of the following are common signs of pneumothorax?

Diaphoresis and cyanosis are indeed common signs associated with pneumothorax. When a pneumothorax occurs, air enters the pleural space, leading to a potential collapse of the lung on the affected side. This can result in decreased oxygenation of the blood, which may manifest as cyanosis, or a bluish discoloration of the skin, particularly in areas such as the lips and fingertips. Diaphoresis, or excessive sweating, may also occur as the body responds to pain or distress associated with the sudden onset of the condition.

The presence of these signs indicates a significant respiratory compromise that may necessitate immediate medical intervention. In contrast, the other options involve symptoms that are not typically associated with pneumothorax. High fever and weight loss, bradycardia and hypotension, as well as fever and cough, relate more to other conditions such as infections or systemic illnesses rather than the direct effects of a pneumothorax. Understanding these specific signs is crucial for identifying respiratory emergencies effectively.