Pneumothorax After Superior Plating of Clavicle Fractures: Are the Concerns Warranted?

Purpose:The primary goal of this study was to determine the anatomic relationship between the clavicle and the apical lung segment. The secondary goal was to determine the incidence of pneumothorax (PTX) in patients who underwent clavicle ORIF to analyze the utility of postoperative chest radiographs.Methods:Six hundred thirty-one patients with a midshaft clavicle fracture who underwent superior plating at a single institution were identified. Forty-two patients had a CT scan of the chest. Three points on the uninjured clavicle were defined: 2 cm from the medial end of the clavicle, the mid-point of the clavicle, and 2 cm from the lateral end of the clavicle. At each point, the distance from both the inferior cortex and the superior cortex of the clavicle to the apical lung segment was measured. All 631 patients who underwent Open Reduction and Internal Fixation had a postoperative chest radiograph to evaluate implant placement, restoration of clavicular length, and presence of PTX.Results:From the lateral end of the clavicle, the mean distance of the lung was 60.0 +/- 14.9 mm (20.1 to 96.1 mm) from the inferior cortex of the clavicle. At the mid-point, the mean distance of the lung was 32.3 +/- 7.2 mm (20.4 to 45.5 mm) from the inferior cortex of the clavicle. At the medial end, the mean distance of the lung was 18.0 +/- 5.5 mm (8.1 to 28.9 mm) from the inferior cortex of the clavicle. A review of postoperative radiographs for all 631 patients revealed none (0%) with a postoperative iatrogenic PTX.Conclusion:The risk of injury is minimal in all three zones. Postoperative chest radiographs after clavicle fracture repair to rule out PTX are unnecessary.