Pelvic diastasis from the saddle: not to be forgotten

Early failure of symphysis pubis plating

INTRODUCTION

Operative fixation of a disrupted symphysis pubis helps return alignment and stability to a traumatized pelvic ring. Implant loosening or failure has been demonstrated to commonly occur at some subacute point during the postoperative period. The purpose of this study is to report on a series of patients with traumatic pelvic ring disruptions to determine the incidence and common factors associated with early postoperative symphyseal plate failure before 7 weeks.

MATERIALS AND METHODS

126 patients retrospectively identified with unstable pelvic injuries treated with open reduction and plate fixation of the symphysis pubis and iliosacral screw fixation. Preoperative and postoperative radiographs, computed tomography (CT) images, and medical chart were reviewed to determine symphyseal displacement preoperatively and postoperatively, time until plate failure, patient symptoms and symphyseal displacement at failure, subsequent symphyseal displacement, incidence of additional surgery, and patient weight bearing compliance.

RESULTS

14 patients (11.1%) sustained premature postoperative fixation failure. 13 patients had anteroposterior compression (APC)-II injuries and 1 patient had an APC-III injury. Preoperative symphyseal displacement was 35.6 millimeters (mm) (20.8-52.9). Postoperative symphyseal space measurement was 6.3mm (4.7-9.3). Time until plate failure was 29days (5-47). Nine patients (64.2%) noted a pop surrounding the time of failure. Symphyseal space measurement at failure was 12.4mm (5.6-20.5). All patients demonstrated additional symphyseal displacement averaging 2.6mm (0.2-9.4). Two patients (14.2%) underwent revision. Four patients (28.5%) were non-compliant.

CONCLUSION

Premature failure of symphysis pubis plating is not uncommon. In this series, further symphyseal displacement after plate failure was not substantial. The presence of acute symphyseal plate failure alone may not be an absolute indication for revision surgery. Making patient education a priority could lead to decreased postoperative non-compliance and potentially a decreased incidence of implant failure. Posterior pelvic ring fixation aides overall pelvic ring stability and may help minimize further displacement after early postoperative symphyseal plate failure. Further functional outcome and biomechanical studies surrounding early symphyseal plate failure are needed.

Saddle-horn injury of the pelvis. The injury, its outcomes, and associated male sexual dysfunction

BACKGROUND

A saddle-horn injury of the pelvis occurs when a horse rider is thrown into the air and then falls back, with the perineum coming into contact with the saddle or saddle horn. The purpose of this study was to evaluate the characteristics and clinical outcomes, including sexual dysfunction, of this injury.

METHODS

We conducted a retrospective review of a consecutive series of male patients who had a saddle-horn injury of the pelvis after being bucked from a horse. Clinical and radiographic results were assessed more than eighteen months after the injury. Functional outcome measures were evaluated at the time of the latest follow-up with use of visual analog pain scales, a questionnaire addressing occupational and recreational function, the International Index of Erectile Function instrument, the Iowa pelvic score, and the Short Form-36.

RESULTS

Twenty patients were assessed at an average of thirty-three months after the injury. Seventeen patients had returned to riding horses, and ten felt that they had returned to their previous level of recreation, which had been "heavy" in nine cases and "moderate" in one. Eighteen patients had returned to their previous employment. Eighteen patients were found to have sexual dysfunction at the time of the latest follow-up. The mean Iowa pelvic score was 84 points (range, 56 to 99 points). The Short Form-36 outcomes scores were diminished in two subsections, role physical and role emotional, compared with population norms.

CONCLUSIONS

Mild pain can be expected after saddle-horn injury despite successful surgical treatment, and the injury does not preclude a return to previous employment or riding horses. A high proportion of men experience erectile dysfunction, which is unlikely to respond well to pharmacologic therapy.