Question

A male patient presented with a bone fracture following a road traffic accident. After 2 days he developed dyspnea, petechiae involving the whole body, and a fall in oxygen saturation. What is the likely diagnosis? 

• A. Fat embolism
• B. Air embolism
• C. Venous thromboembolism
• D. Pulmonary hypertension

Answer 1

The Correct Option is A

The question describes a male patient who developed specific symptoms such as dyspnea, petechiae, and hypoxemia following a bone fracture due to a road traffic accident. To determine the likely diagnosis, consider the following explanations:

1. Fat embolism: This condition commonly occurs after a fracture of long bones, like the femur, where fat globules are released into the bloodstream. Symptoms typically appear 24-72 hours post-injury and include respiratory distress (dyspnea), petechiae (small red or purple spots on the skin), and reduced oxygen saturation. Based on the patient's symptoms and timeline, this is the most probable diagnosis.
2. Air embolism: This occurs when air enters the veins, which is more common in procedures like surgeries or intravenous catheter insertion, not typically after bone fractures in road accidents.
3. Venous thromboembolism: While this involves blood clots that can travel to the lungs causing pulmonary embolism, the presence of petechiae is not characteristic of this condition.
4. Pulmonary hypertension: This condition involves high blood pressure in the pulmonary arteries and is not associated with sudden onset after trauma.

Given the context and symptoms—especially the petechial rash and respiratory distress following a fracture—the most plausible diagnosis is fat embolism.