JBL EMT Practice Exam 2026 - Free EMT Practice Questions and Study Guide

Based on the presented patient presentation with shortness of breath, sharp chest pain, dried blood around the mouth, facial cyanosis, and low oxygen saturation level, the most likely condition to suspect is an acute pulmonary embolism (PE).

A pulmonary embolism occurs when a blood clot travels to the lungs and becomes lodged in a pulmonary artery. This can lead to a sudden decrease in oxygenation, resulting in symptoms such as shortness of breath, chest pain, and low oxygen saturation levels. The presence of dried blood around the patient's mouth and facial cyanosis may indicate hypoxemia, which is common in pulmonary embolism due to the impaired oxygen exchange caused by the blood clot in the lung.

While acute pulmonary edema, right-sided heart failure, and spontaneous pneumothorax can also present with symptoms such as shortness of breath and chest pain, the specific combination of findings in this scenario, including the recent hip surgery that could have predisposed the patient to blood clots, makes acute pulmonary embolism the most likely diagnosis to consider.