• Guoxin Fan, Chaobo Feng, Bangde Yin, Xiaofei Guan, Yunshan Fan, Yanjie Zhu, Chuanfeng Wang, and Shisheng He.
• Orthopedic Department, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.
• World Neurosurg. 2018 Nov 1; 119: e1021-e1028.

ObjectiveIn percutaneous endoscopic transforaminal discectomy (PETD), surgeons are exposed to intraoperative radiographic radiation over a long-term career, which may be correlated with high risk of iatrogenic radiation hazards. The purpose of this prospective cohort study was to assess the impact of concentric stereotactic technique on radiation exposure to surgeons in PETD.MethodsPatients who underwent conventional PETD were regarded as group A, whereas those undergoing PETD with concentric stereotactic technique were considered as group B. The primary outcomes were cumulative radiation dose to the surgeon's eye, thyroid gland, and breast.ResultsA total of 34 patients were treated in group A and 30 patients were treated in group B. The cumulative radiation dose of the eye per operation was 0.017 (0.58/34) mSv in group A and 0.010 (0.31/30) mSv in group B, which meant a reduction of 41.18%. The cumulative radiation dose of the thyroid gland per operation was 0.018 (0.60/34) mSv in group A and 0.011 (0.33/30) mSv in group B, which meant a reduction of 38.89%. The cumulative radiation dose of the chest per operation was 0.039 (1.33/34) mSv in group A and 0.023 (0.70/30) mSv in group B, which meant a reduction of 41.03%. There were no significant differences in hospital stay, visual analog scale score of waist and leg pain, Oswestry Disability Index score, MacNab satisfaction, and complications between the 2 groups (P > 0.05).ConclusionsThe concentric stereotactic technique can effectively reduce radiation exposure to surgeons by about 40%.Copyright © 2018 Elsevier Inc. All rights reserved.

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