Chinese Journal of Tissue Engineering Research ›› 2019, Vol. 23 ›› Issue (30): 4822-4827.doi: 10.3969/j.issn.2095-4344.1433

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A study of a safe area and angle for harvesting autogenous hamstring tendons for anterior cruciate ligament reconstruction

Chen Yinghua1, Wei Qingjun2, Yao Jun2
  

  1. 1Langdong Hospital Affiliated to Guangxi Medical University, Nanning 530029, Guangxi Zhuang Autonomous Region, China; 2First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • Received:2019-05-15 Online:2019-10-28 Published:2019-10-28
  • Contact: Wei Qingjun, MD, Chief physician, First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • About author:Chen Yinghua, Master, Physician, Langdong Hospital Affiliated to Guangxi Medical University, Nanning 530029, Guangxi Zhuang Autonomous Region, China

Abstract:

BACKGROUND: More and more attention has been paid to the reconstruction of anterior cruciate ligament by autologous hamstring muscle transplantation, but it was found that some patients had abnormal sensation in the anterior knee and medial anterior leg, which was caused by the injury of the saphenous nerve or the inferior patellar branch of the saphenous nerve when the hamstring tendon was cut intraoperatively.
OBJECTIVE: An incision was identified through the anatomy of the knee joint security area and angle, to avoid damaging the saphenous nerve and its infrapatellar branch in harvesting gracilis tendon and semitendinosus tendon.
METHODS: Knee joint fresh specimens were harvested from 10 patients who underwent leg amputation. Written informed consent was obtained from each patient. This study was approved by the Ethics Committee of Langdong Hospital Affiliated to Guangxi Medical University and the First Affiliated Hospital of Guangxi Medical University. The saphenous nerve and its branches were isolated. The inner edge of patellar ligament tibial tubercle was marked as point A. A horizontal line through the point A was drawn. The intersection of the horizontal line with saphenous nerve trunk was marked as point C. The intersection of the horizontal line with saphenous nerve infrapatellar branch was marked as point B. The distance between point A and point C and between point A and point B was measured and recorded as distance AC and AB respectively. The scope of operation safety and incision angle would be calculated using analysis and statistic software.
RESULTS AND CONCLUSION: Safe range of surgical incision: The distance AC was (5.5±0.3) cm, and the distance AB was (3.5±0.2) cm. Safe angle of surgical incision: The saphenous nerve infrapatellar branch was (50.7±4.8) °, The saphenous nerve tibial tubercle branch was (43.3±5.4) °. The safe range of surgical incision was within the (3.5±0.2) cm in the inner edge of patellar ligament tibial tubercle (A point) and the safe angle was (50.7±4.8) °.

Key words: anterior cruciate ligament, autogenous hamstring tendons, anatomy, saphenous nerve, saphenous nerve infrapatellar branch

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