Lu Y, Hayashi K, Edwards R B, Fanton G S, Thabit G, Markel M D
Comparative Orthopaedic Research Laboratory, School of Veterinary Medicine, University of Wisconsin-Madison, USA.
Am J Sports Med. 2000 Sep-Oct;28(5):711-9. doi: 10.1177/03635465000280051601.
The purpose of this study was to compare joint capsular healing after two delivery patterns of monopolar radiofrequency energy: 1) uniform treatment of the joint capsule (paintbrush pattern) and 2) multiple single linear passes (grid pattern). First, an in vitro study was performed to compare the percent shrinkage of these two treatment patterns using the femoropatellar joints (stifles) of six sheep. Monopolar radiofrequency energy (settings, 70 degrees C/15W) was applied to the lateral joint capsule; the treated area was approximately 10 x 10 mm. There was no significant difference in shrinkage between the grid (27% +/- 8.7%) and paintbrush (29% +/- 7.9%) patterns. In the in vivo study, stifles of 24 sheep were randomly assigned to the paintbrush or the grid pattern groups and treatment was performed arthroscopically. Sheep were sacrificed immediately after surgery, or at 2, 6, or 12 weeks after surgery. At 6 weeks after surgery, confocal microscopy demonstrated that treated areas had almost completely repaired in the grid group; some nonviable areas were still present in the paintbrush group. Mechanical testing at 6 weeks indicated that joint capsule in the grid group had better mechanical properties than capsule in the paintbrush group. This study revealed that radiofrequency treatment of joint capsule in a grid pattern allowed faster healing than tissue treated in a paintbrush pattern.
1）关节囊的均匀治疗（刷状模式）和2）多个单一线性穿刺（网格模式）。首先，进行了一项体外研究，使用六只绵羊的股髌关节（膝关节）比较这两种治疗模式的收缩百分比。将单极射频能量（设置为70摄氏度/15瓦）施加于外侧关节囊；治疗区域约为10×10毫米。网格模式（27%±8.7%）和刷状模式（29%±7.9%）之间的收缩率没有显著差异。在体内研究中，将24只绵羊的膝关节随机分配到刷状模式或网格模式组，并通过关节镜进行治疗。绵羊在手术后立即处死，或在手术后2周、6周或12周处死。术后6周，共聚焦显微镜显示网格组的治疗区域几乎完全修复；刷状模式组仍存在一些无活力区域。术后6周的力学测试表明，网格组的关节囊比刷状模式组的关节囊具有更好的力学性能。本研究表明，以网格模式进行关节囊的射频治疗比以刷状模式治疗的组织愈合更快。
