塞来昔布对膝关节表面置换患者的预防性镇痛

背景：超前镇痛的有效性目前存在争议,既往研究中关于置换前因素对外周及中枢敏感化作用的重视程度不够。目测类比评分法在某些时候不能有效的反映患者的疼痛情况,其客观性和重复性不佳。 目的：观察塞来昔布对膝关节表面置换患者置换前预防性镇痛的有效性。 方法：选取因膝关节病行膝关节表面置换的患者为评估对象,经匹兹堡睡眠质量指数、抑郁自评量表及焦虑自评量表评分后筛选出患者30例,按随机数表法等分为塞来昔布组和维生素C组。两组患者入院后第2-4天分别口服塞来昔布与维生素C,并分别于服药前1 d晚及服药后第3天晚用目测类比评分法评定患者轻重侧静息及活动时的疼痛程度,再用痛阈测量仪测量患者的电痛阈及电耐痛阈值,测量过程遵循随机双盲对照原则。 结果与结论：塞来昔布组患者服用塞来昔布3 d后双膝静息及运动状态下目测类比评分变化差异无显著性意义(P > 0.05),双侧下肢的电痛阈较服药前提高(P < 0.05),重侧电痛阈值(目测类比评分较轻侧高)服药前、后变化较轻侧明显(P < 0.05),双侧下肢电耐痛阈用药前后的目测类比评分变化差异无显著性意义(P > 0.05);塞来昔布组患者服药前后双膝轻重侧的目测类比评分变化差值与对应侧的电痛阈及电耐痛阈的变化差值无显著相关性(P > 0.05);维生素C组患者服药前后双膝的目测类比评分、双侧下肢电痛阈及电耐痛阈变化均差异无显著性意义(P > 0.05)。结果证实,塞来昔布可提高膝关节病患者行全膝关节表面置换置换前的电痛阈,重侧更为敏感,在全膝关节表面置换前可发挥预防性镇痛的作用。相对于目测类比评分,痛阈的变化或能更敏感地反映膝关节置换患者用药前后的疼痛变化,疼痛水平的变化与疼痛敏感度的变化之间尚无相关性。

Preventive analgesia of Celebrex for patients receiving total knee arthroplasty

BACKGROUND:The preemptive analgesia is still a controversial issue. Existing studies have not paid much attention to effects of preoperative factors on the hypersensitivity of peripheral and central mechanisms. Visual analog scale scores cannot subjectively and repeatedly reveal patient’s pain. OBJECTIVE:To investigate the validity of the preventive analgesia effect of Celebrex in patients with total knee arthroplasty. METHODS:Patients with osteoarthritis of the knee who received total knee arthroplasty were accessed by Pittsburgh sleep quality index, self-rating depression scale and self-rating anxiety scale. In all, thirty patients were enrolled in the study. They were randomized into Celebrex group and vitamin C group, and each group had 15 patients. The patients in the Celebrex group and vitamin C group took 200 mg Celebrex and vitamin C, respectively, twice a day from day 2 to day 4. Both of their knees were evaluated by resting visual analogue scale and moving visual analogue scale in the evening of day 1 before treatment and day 3 after treatment. Meanwhile, the pain threshold and pain tolerance were accessed by a pain-threshold machine. RESULTS AND CONCLUSION:No statistical significance of the changes of resting and moving visual analogue scale scores was found in both knees in the Celebrex group (P > 0.05). The pain threshold of both knees were significantly increased (P < 0.05), and the severe knee, which had less visual analogue scale scores than the minor one, turned out to increase more obviously than the minor knee (P > 0.05). There were no significant changes in the pain tolerance in both knees (P > 0.05). The changing values of resting or moving visual analogue scale were not significantly correlated with the pain threshold and pain tolerance (P > 0.05). There were no significant changes in visual analogue scale scores, pain threshold and pain tolerance in both knees of the vitamin C group (P > 0.05). Celebrex could increase the pain threshold of patients receiving total knee arthroplasty, especially the severe knee, which indicates that the Celebrex is good for the preventive analgesia. Comparatively speaking, the pain threshold might be more sensitive than visual analogue scale in revealing the change of pain after analgesia. There is no significant correlation between visual analogue scale score and the hypersensitivity of pain.