Duffy Daniel J, Curcillo Chiara J, Chang Yi-Jen, Moore George E
Am J Vet Res. 2020 Sep;81(9):714-719. doi: 10.2460/ajvr.81.9.714.
To evaluate the effect of suture caliber on the tensile strength of tenorrhaphies performed with a locking-loop technique in cadaveric canine tendons.
60 superficial digital flexor tendons (SDFTs) from 30 cadaveric adult dogs.
Transverse tenotomy was performed, and SDFTs were repaired with a locking-loop technique and polypropylene suture of 5 randomly assigned calibers: size-0, 2-0, 3-0, 4-0, or 5-0 (n = 12 SDFTs/suture caliber). Tendon constructs were tested to failure. Yield, peak, and failure forces and causes of failure were compared between groups.
Mean ± SD failure force for the constructs was significantly greater with large-caliber suture (size-0: 73.5 ± 3.1 N; size 2-0: 54.4 ± 7.1 N; size 3-0: 28.7 ± 4.9 N; size 4-0: 18.7 ± 3.4 N; and size 5-0: 8.8 ± 2.8 N). The likelihood of construct failure by suture pullout through the tendon substance increased with large-caliber suture (size-0: 12/12), whereas the likelihood of construct failure by suture breakage increased with small-caliber suture (2-0: 10/12; 3-0, 4-0, and 5-0: 12/12 each).
Large-caliber suture had greater tensile strength for tenorrhaphies performed with a locking-loop technique in cadaveric canine tendons. Prior to the use of large-caliber suture in patients requiring tenorrhaphy, however, in vivo studies are required to confirm the results obtained here.
评估缝线直径对在犬尸体肌腱上采用锁定环技术进行肌腱缝合的抗张强度的影响。
取自30只成年犬尸体的60条指浅屈肌腱（SDFT）。
进行横向肌腱切断术，采用锁定环技术并用5种随机分配直径的聚丙烯缝线修复SDFT：0号、2-0号、3-0号、4-0号或5-0号（每种缝线直径12条SDFT）。对肌腱结构进行直至破坏的测试。比较各组的屈服力、峰值力、破坏力及破坏原因。
大直径缝线构建的结构平均±标准差破坏力显著更高（0号：73.5±3.1N；2-0号：54.4±7.1N；3-0号：28.7±4.9N；4-0号：18.7±3.4N；5-0号：8.8±2.8N）。随着缝线直径增大，缝线从肌腱实质中拔出导致结构破坏的可能性增加（0号：12/12），而随着缝线直径减小，缝线断裂导致结构破坏的可能性增加（2-0号：10/12；3-0号、4-0号和5-0号：均为12/12）。
在犬尸体肌腱上采用锁定环技术进行肌腱缝合时，大直径缝线具有更高的抗张强度。然而，在需要肌腱缝合的患者中使用大直径缝线之前，需要进行体内研究以证实此处获得的结果。
