• Eur J Trauma Emerg Surg · Dec 2022

    Defects of the sciatic nerve and its divisions treated by direct suturing in 90 degrees knee flexion: report on the first clinical series.

    • Laurent Mathieu, Yannick Cloquell, James Charles Murison, Georges Pfister, Christophe Gaillard, Christophe Oberlin, and Zoubir Belkheyar.
    • Department of Orthopedic, Trauma and Reconstructive Surgery, Percy Military Hospital, 101 avenue Henri Barbusse, 92140, Clamart, France. laurent_tom2@yahoo.fr.
    • Eur J Trauma Emerg Surg. 2022 Dec 1; 48 (6): 495549624955-4962.

    ObjectiveTo evaluate functional results after treatment of large defects of the sciatic nerve and its divisions by direct nerve suturing in high knee flexion.MethodsA retrospective review was conducted in patients treated for lower extremity nerve defects between 2011 and 2019. Inclusion criteria were a defect > 2 cm with a minimal follow-up period of 2 years for the sciatic nerve and 1 year for its divisions. Nerve defects were bridged by an end-to-end suture with the knee flexed at 90° for 6 weeks. Functional results were assessed based on the Medical Research Council's grading system.ResultsSeventeen patients with a mean age of 27.6 years were included. They presented with seven sciatic nerve defects and ten division defects, including eight missile injuries. The mean time to surgery was 12.3 weeks and the mean nerve defect length was 5 cm. Overall, 21 nerve sutures were performed, with eight in the tibial distribution and 13 in the fibular distribution. Post-operatively, there was no significant knee stiffness related to the immobilization. The mean follow-up time was 24.5 months. Meaningful motor and sensory recovery were observed after 7 of 8 sutures in the tibial distribution and 11 of 13 sutures in the fibular distribution. A functional sural triceps muscle with protective sensibility of the sole was restored in all patients. There were no differences according to the injury mechanisms.ConclusionTemporary knee flexion at 90° allows for direct coaptation of sciatic nerve defects up to 8 cm, with promising results no matter the level or mechanism of injury.© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany.

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