Comprehensive Respiratory and Burn Care Practice Test 2026 - Free Practice Questions and Study Guide

Shallow breathing after a rib fracture leads to atelectasis because pain and guarding keep breaths shallow, so the lungs don’t fully inflate. When ventilation is reduced, some alveoli and small airways collapse, especially in the dependent parts of the lungs, lowering overall lung volumes and impairing gas exchange. This is why preventing shallow breaths with good pain control and encouraging deep breaths (through incentive spirometry and early mobilization) is a key step to avoid atelectasis.

Pneumothorax and hemothorax are possible injuries with chest trauma, but they are separate mechanisms involving air or blood in the pleural space, not the typical consequence of shallow breathing from rib pain. Pulmonary edema isn’t a direct result of shallow breathing in this context.