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- W2084932257 abstract "Background High tibial osteotomy is technically demanding. Risks include injury to the popliteal neurovascular bundle. The present goal was to further define this risk. Hypothesis The distance from the posterior tibia to the popliteal artery increases with increasing knee flexion. A saw angle perpendicular to the coronal plane can injure the popliteal artery. Study Design Descriptive laboratory study. Methods Seven fresh-frozen cadaveric lower extremities were used. Lateral radiographs at knee flexion angles of 90°, 60°, 45°, 30°, and 0° were taken to measure the distance from the anterior border of the popliteal artery to the posterior cortex of the tibia 5.0 mm and 2.0 cm below the joint line. After an opening wedge high tibial osteotomy was made, qualitative assessments were made of the depth of a saw blade inserted into the kerf and the relative encroachment of the saw blade on the popliteal artery. The interval through which the space anterior to the popliteus can be accessed was identified by gross dissection in all specimens. Results The distance from the posterior tibia to the popliteal artery increased with knee flexion. At 5.0 mm and 2.0 cm below the joint line, the mean distance at 90° was significantly greater than at all other angles. The popliteal artery could be injured by the oscillating saw at angles greater than 30° to the coronal plane. A protective device inserted anterior to the popliteus protects the neurovascular structures. Conclusion The popliteal artery is farthest from the posterior tibia at 90° of knee flexion. Saw angles greater than 30° from the coronal plane put the popliteal neurovasculature at risk of injury. Clinical Relevance To perform a safe osteotomy, the knee should be positioned in 90° of flexion with the saw angled less than 30° from the coronal plane. A protective device deep to the popliteus may protect against popliteal injury." @default.
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- W2084932257 date "2010-03-03" @default.
- W2084932257 modified "2023-10-02" @default.
- W2084932257 title "Vascular Safety during High Tibial Osteotomy" @default.
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- W2084932257 doi "https://doi.org/10.1177/0363546510363664" @default.
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