Department of Anesthesiology, Harvard Medical School, Brigham & Women's Hospital, Chestnut Hill, Massachusetts 0246, USA.
J Pain. 2011 Sep;12(9):953-63. doi: 10.1016/j.jpain.2011.02.357. Epub 2011 Jun 16.
UNLABELLED: This study employed quantitative sensory testing (QST) to evaluate pain responses in chronic spinal pain patients at low risk and high risk for opioid misuse, with risk classification based on scores on the Screener and Opioid Assessment for Patients with Pain-Revised (SOAPP-R). Patients were further subgrouped according to current use of prescription opioids. Of the 276 chronic pain patients tested, approximately 65% were taking opioids; a median split was used to further categorize these patients as being on lower or higher doses of opioids. The high-risk group (n = 161) reported higher levels of clinical pain, had lower pressure and thermal pain thresholds at multiple body sites, had lower heat pain tolerance, and rated repetitive mechanical stimuli as more painful relative to the low-risk group (n = 115; P's < .01). In contrast, QST measures did not differ across opioid groups. Multiple linear regression analysis suggested that indices of pain-related distress (ie, anxiety and catastrophizing about pain) were also predictive of hyperalgesia, particularly in patients taking opioids. Collectively, regardless of opioid status, the high-risk group was hyperalgesic relative to the low-risk group; future opioid treatment studies may benefit from the classification of opioid risk, and the examination of pain sensitivity and other factors that differentiate high- and low-risk groups. PERSPECTIVE: This study demonstrates that chronic spinal pain patients at high risk for misuse of prescription opioids are more pain-sensitive than low-risk patients, whether or not they are currently taking opioids. Indices of pain-related distress were important predictors of pain sensitivity, particularly among those patients taking opioids for pain.
本研究采用定量感觉测试(QST)来评估慢性脊柱疼痛患者中低风险和高风险阿片类药物滥用者的疼痛反应,风险分类基于筛选器和疼痛患者评估修订版(SOAPP-R)的评分。根据当前处方阿片类药物的使用情况,患者进一步分为亚组。在接受测试的 276 名慢性疼痛患者中,约 65%正在服用阿片类药物;中位数分割进一步将这些患者分为低剂量或高剂量阿片类药物组。高风险组(n = 161)报告的临床疼痛水平较高,多个身体部位的压力和热痛阈值较低,热痛耐受度较低,并且相对于低风险组(n = 115),他们认为重复机械刺激更痛苦(P <.01)。相比之下,阿片类药物组之间的 QST 测量值没有差异。多元线性回归分析表明,与疼痛相关的痛苦指数(即对疼痛的焦虑和灾难化)也可预测痛觉过敏,尤其是在服用阿片类药物的患者中。总之,无论阿片类药物状态如何,高风险组相对于低风险组都表现出痛觉过敏;未来的阿片类药物治疗研究可能受益于阿片类药物风险的分类,以及对区分高风险和低风险组的疼痛敏感性和其他因素的检查。
观点:本研究表明,与低风险患者相比,高风险滥用处方阿片类药物的慢性脊柱疼痛患者更敏感,无论他们是否正在服用阿片类药物。与疼痛相关的痛苦指数是疼痛敏感性的重要预测指标,尤其是在那些服用阿片类药物治疗疼痛的患者中。
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