Sawing toward the fibular head during open-wedge high tibial osteotomy carries the risk of popliteal artery injury

Taehoon Kang, Do Weon Lee, Jae Young Park, Hyuk Soo Han, Myung Chul Lee, Du Hyun Ro

Research output: Contribution to journalArticle

Abstract

Purpose: Popliteal artery injury is a rare but devastating complication of open-wedge high tibial osteotomy (OWHTO). The objectives of this study were: to document the location of the artery in the virtual osteotomy plane (VOP), to measure the minimal distance between the popliteal artery and three virtual saw-progression lines (VSLs), and to present a safe sawing technique for OWHTO. Method: In total, 45 computed tomography angiographies were reconstructed and virtual osteotomy was simulated using 3D image-processing software. The VOP was defined as an inclined plane commencing 3.5 cm below the articular plane towards the fibular head. VSLs were defined as saw-progression guidelines that lie on the VOP: “VSL-mid” runs from the midpoint of the tibial medial cortex towards the fibular head; “VSL-ant” starts from the same point as VSL-mid, but runs 10° anterior to the fibular head; and “VSL-post” runs 10° posterior to the fibular head. The distances between the popliteal artery and the three VSLs were measured, and the risk of injury was assessed. Results: The popliteal artery was located 20.7° posterior to VSL-mid and 51 mm from the starting point. The minimum distance between the popliteal artery and VSL-mid was 18 mm (99% confidence interval 9–27 mm). When the saw was moved along VSL-mid, 42% of the arteries were susceptible to injury. However, when it followed VSL-ant, there was no risk of injury. Conclusions: Sawing toward the fibular head carries a risk of popliteal artery injury and should not be performed. When sawing in OWHTO, the recommended target should be 10° anterior to the fibular head. This technique eliminates the risk of popliteal artery injury.

Original languageEnglish
Pages (from-to)1365-1371
Number of pages7
JournalKnee Surgery, Sports Traumatology, Arthroscopy
Volume28
Issue number5
DOIs
StatePublished - 1 May 2020

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Keywords

  • Complications
  • High tibial osteotomy
  • Image reconstruction
  • Popliteal artery
  • Risk prediction
  • Surgical technique
  • Virtual surgery

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