West Coast EMT Block Two Practice Exam

Asymmetrical chest expansion is a key sign often observed in a patient experiencing a spontaneous pneumothorax. When air enters the pleural space, one lung may collapse partially or fully, leading to a noticeable difference in the expansion of the chest on the affected side compared to the unaffected side during inhalation. This asymmetry can be a critical indicator for EMTs and healthcare providers when evaluating patients for potential pneumothorax.

In cases of spontaneous pneumothorax, the tension created by the presence of air in the pleural cavity disrupts normal respiratory mechanics, which is reflected in the physical examination findings. Observing and recognizing asymmetrical chest expansion can prompt further assessment and intervention.

While other signs and symptoms, such as wheezing, chest tightness, and bradycardia, may occur, they are not as directly indicative of pneumothorax as asymmetrical chest expansion. Wheezing often suggests bronchospasm or airway obstruction; chest tightness could be related to various conditions, including anxiety or asthma; and bradycardia may indicate a separate issue, such as increased vagal tone or another cardiac problem. Thus, the emphasis on chest expansion makes this sign particularly relevant in the context of identifying spontaneous pneumothorax effectively