Defining Sacral Dysmorphism: What Size Corridor Precludes Transsacral Screw Placement

Objective: To determine what size S1-transsacral (TS) corridor is amenable to TS screw placement, as this is commonly used to identify sacral dysmorphism, and to determine if gender, ethnicity, or screw breach is associated with narrow corridors. Design: Retrospective review. Setting: Urban level-1 trauma center. Patients: Two hundred ninety patients with pelvic ring injuries and preoperative computed tomography (CT) scans. Intervention: Percutaneous posterior pelvic ring fixation. Main Outcome Measurements: The width of the S1-TS corridor was measured on the axial (inlet) and coronal (outlet) reformatted CT images. Patients with S1-TS screw fixation and postoperative CT scans were identified. Corridor size, gender, ethnicity, and screw breach were documented. Results: S1-TS screws were placed in 55 of the 290 patients. No S1-TS screws were placed in corridors less than 8 mm. Corridors of
Source: Journal of Orthopaedic Trauma - Category: Orthopaedics Tags: Original Article Source Type: research