# Proximal Pulmonary Fat Embolism on Non-Contrast Chest CT

## TL;DR

A case report shows how a non-contrast chest CT scan helped detect a fat embolism causing cardiac arrest after hip surgery.

## Contribution

Highlights the diagnostic benefit of non-contrast chest CT in identifying fat embolisms post-orthopedic surgery.

## Key findings

- Proximal pulmonary fat embolism was detected using non-contrast chest CT.
- Non-contrast CT aids in identifying fatty thrombi, improving diagnostic accuracy.
- The case emphasizes the importance of non-contrast imaging in postoperative differential diagnosis.

## Abstract

We report in this clinical case a proximal pulmonary fat embolism detected on unenhanced chest computed tomography (CT) responsible for a recovered cardiac arrest during a left total hip arthroplasty for a femoral neck fracture. This observation underscores the diagnostic value of integrating a non-contrast phase in chest CT in the postoperative context of orthopedic surgery, as it ensures accurate identification of the fatty nature of pulmonary arterial thrombi and thereby contributes to improved diagnostic accuracy and differential diagnosis.