Radiation Exposure in Percutaneous Zadek Osteotomy vs Open Haglund Resection: A Retrospective Comparative Study

Fluoroscopy is a vital imaging technique in orthopaedic surgery, particularly with the growing adoption of minimally invasive surgery (MIS). Because of their increased reliance on intraoperative imaging, MIS techniques may necessitate greater use of fluoroscopy and radiation compared with open procedures; therefore, the use of modern mini C-arm systems is recommended to mitigate radiation exposure. Although MIS offers significant benefits, its use also raises concerns regarding radiation exposure for both patients and surgical staff. This study evaluated radiation dose and fluoroscopy time comparing 2 common procedures used to treat insertional Achilles tendinitis: the percutaneous Zadek osteotomy (ZO) and the open midline Achilles tendon splitting Haglund resection (HR). We hypothesized that the percutaneous ZO would be associated with increased radiation dose and fluoroscopy time in comparison to the open HR but would be below the recommended occupational exposure limits.

A retrospective review was conducted of all patients who underwent a percutaneous ZO or an open HR between January 2021 and July 2025. All procedures were performed by one of 2 fellowship-trained foot and ankle surgeons at a single academic institution. Radiation exposure was assessed using total radiation dose (mGy) and total fluoroscopy time (minutes).

A total of 139 patients met inclusion criteria. Sixty patients underwent a percutaneous ZO, whereas 79 underwent an open HR. The percutaneous ZO cohort demonstrated a mean fluoroscopy time of 2.83 ± 1.64 (range, 0.70-7.17) minutes and an average radiation dose of 3.25 ± 2.06 (range, 0.55-8.07) mGy. Meanwhile an average fluoroscopy time of 0.42 ± 0.19 (range, 0.03-0.90) minutes was observed in the open HR cohort, which had a mean radiation dose of 0.38 ± 0.20 (range, 0.02-1.17) mGy. The percutaneous ZO cohort demonstrated a significantly higher radiation dose (P < .001) and fluoroscopy time (P < .001).

The percutaneous ZO was associated with a significantly higher radiation dose than the open HR; however, despite being statistically significant, this may not be clinically relevant. As surgeons receive only 0.50% of the dose, approximately 1225 percutaneous ZO procedures would be required to exceed annual safety limits. These findings suggest that radiation exposure during the percutaneous ZO technique remains well below the International Commission on Radiological Protection's annual occupational limit of 20.00 mSv. Consistent with the ALARA principle, low-dose mini C-arm settings and protective equipment help minimize radiation exposure to patients and surgical staff.

Level III, retrospective comparative study.