• Pascal Kouyoumdjïan, Guillaume Gras-Combe, Mickael Grelat, Stéphane Fuentes, Benjamin Blondel, Patrick Tropiano, Fahed Zairi, Jacques Beaurain, Yann-Philippe Charles, Alexandre Dhenin, Hassan Elfertit, Julien Le Roy, Joel Greffier, and Nicolas Lonjon.
• Orthopedic Surgery, Spine Unit, Hôpital Carémeau, University Montpellier 1, CHU de Nîmes, 30029 Nîmes, France.
• Orthop Traumatol Sur. 2018 Sep 1; 104 (5): 597-602.

HypothesisPercutaneous pedicle screw fixations (PPSF) are increasingly used in spine surgery, minimizing morbidity through less muscle breakdown but at the cost of intraoperative fluoroscopic guidance that generates high radiation exposure. Few studies have been conducted to measure them accurately.Material And MethodsThe objective of our study is to quantify, during a PPSF carried out in different experimented centers respecting current radiation protection recommendations, this irradiation at the level of the surgeon and the patient. We have prospectively included 100 FPVP procedures for which we have collected radiation doses from the main operator. For each procedure, the doses of whole-body radiation, lens and extremities were measured.ResultsOur results show a mean whole body, extremity and lens exposure dose per procedure reaching 1.7±2.8μSv, 204.7±260.9μSv and 30.5±25.9μSv, respectively. According to these values, the exposure of the surgeon's extremities and lens will exceed the annual limit allowed by the International Commission on Radiological Protection (ICRP) after 2440 and 4840 procedures respectively.ConclusionRecent European guidelines will reduce the maximum annual exposure dose from 150 to 20mSv. The number of surgical procedures to not reach the eye threshold, according to our results, should not exceed 645 procedures per year. Pending the democratization of neuronavigation systems, the use of conventional fluoroscopy exposes the eyes in the first place. Therefore they must be protected by leaded glasses.Level Of ProofIV, case series.Copyright © 2018. Published by Elsevier Masson SAS.

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