A Comparison of Nerve Injury in Cross Versus Lateral Pinning Fixation of Displaced Supracondylar Humerus Fracture.

BACKGROUND AND OBJECTIVE

Supracondylar fracture of the humerus (SCFH) is a common pediatric fracture encountered in orthopedic surgery. The most frequently used pinning methods include cross pinning or lateral pinning with two or three pins. However, complications such as ulnar nerve injury can occur, particularly during medial pinning, which necessitates careful isolation of the ulnar nerve and expert surgical intervention. The objective of this study is to compare nerve injury in cross versus lateral pinning fixation of the SCFH.

MATERIALS AND METHODS

The observational study was conducted at Sheikh Zayed Hospital, Rahim Yar Khan, PAK. Patients in group L (n=55) underwent lateral pinning, while those in group C (n=55) received cross pinning. The patients were followed retrospectively postoperatively until radiological union was achieved. The outcomes were assessed using the Flynn criteria, and nerve injury was evaluated in both groups. The study aimed to compare the postoperative results between the two groups based on the specified criteria.

RESULTS

The mean age was 7.28±2.03 years in group L and 8.20±2.21 years in group C. The majority of patients in both groups were male. The left side was more commonly involved, and among the 110 patients enrolled, most sustained the injury while playing. The mean follow-up period was 21.3±1.4 months for group L and 23.5±0.2 weeks for group C. Nerve injuries were reported in six (5.45%) patients in group C, while no nerve injuries were reported in group L.

CONCLUSION

For type III SCFH, lateral pinning fixation has demonstrated itself to be an effective alternative, yielding excellent functional outcomes. This method not only minimizes the risk of iatrogenic nerve injury, particularly to the ulnar nerve but also provides sufficient stability for the fracture. The results from this study suggest that lateral pinning is a reliable option for treating unstable supracondylar fractures, with a favorable safety profile and outcomes comparable to, if not better than, those achieved with cross pinning. This makes it a valuable technique, especially in settings where the risk of nerve injury is a significant concern.