异丙酚注射痛预测人工流产术后疼痛程度的准确性

目的 评价异丙酚注射痛预测术后疼痛程度的准确性.方法 拟行无痛人工流产手术的患者7l例,年龄20～40岁,ASA Ⅰ或Ⅱ级.以0.5 ml/s的速率静脉输注1%异丙酚2 mg/kg,当异丙酚给药量达1/3时暂停给药,采用口语等级量表评分法(VRS)评价异丙酚注射痛,VRS评分≥1分为发生注射痛,之后再给予剩余量异丙酚完成麻醉诱导.术后20 min时采用VAS评分法评价患者静卧以及下床站立时的疼痛程度,静卧时VAS评分≥30分为发生术后疼痛.计算异丙酚注射痛预测术后疼痛程度的灵敏度和特异度.结果 异丙酚注射痛发生率为66%,VRS评分与术后静卧以及活动时VAS评分呈正相关(r=0.561,P<0.01;r=0.608,P<0.01).异丙酚注射痛预测术后疼痛的灵敏度为96%,特异度为52%.结论 术前异丙酚注射痛是预测人工流产术后患者疼痛程度的可靠指标.

Accuracy of predicting acute postoperative pain by assessment of intravenous propofol injection-induced pain

Objective To investigate the accuracy of predicting acute postoperative pain by assessment of intravenous propofol injection-induced pain.Methods Seventy-one ASA I or Ⅱ patients aged 20-40 yr scheduled for induced abortion operation were enrolled in this study. The patients were unpremedicated. ECG, HR, BP and SpO_2 were continuously monitored before and during anesthesia. Anesthesia was induced with 2 mg/kg propofol. A third of the induction dose was injected via a dorsal hand vein. Pain induced by iv propofol injection was assessed with verbal rating scale (VRS) (0 = no pain, 3 = severe pain) . Postoperative abdominal pain was assessed with visual analog scale (VAS) (0 = no pain, 100 = most severe pain) at 20 min after operation. Results The propofol injection pain occurred in 66% of patients. Postoperative VAS scores at rest and during activity and intravenous propofol injection-induced pain were significantly correlated (r = 0.561, P<0.01; r = 0.608, P<0.01). The sensitivity and specificity of iv propofol injection-induced pain (VRS > 1) in predicting clinically significant acute postoperative pain (VAS > 30) were 96% and 52% respectively. Conclusion Preoperative iv propofol injection induced pain is a reliable factor in predicting acute postoperative pain and is useful in identifying those women who will experience greater pain after operation.