The journal of pain : official journal of the American Pain Society
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The best-known complication of shingles (herpes zoster) is postherpetic neuralgia (PHN). PHN is commonly studied to investigate causes of and treatments for neuropathic pain. However, many patients with shingles experience neuropathic itch accompanying, or instead of, pain. ⋯ In one group, but not in another, there was an increased number of women with PHI. Subjects whose shingles affected the head, face, and neck were more likely to experience PHI than those whose shingles affected the torso. These findings indicate a need for research on zoster-associated itch, including prospective studies on frequency, impact, and treatment.
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Review Meta Analysis
Management of opioid side effects in cancer-related and chronic noncancer pain: a systematic review.
Side effects can limit opioid dosage and reduce quality of life. The purpose of this systematic review was to assess the management of opioid side effects in the context of cancer pain management or, in the event that no evidence was available for cancer pain, for chronic noncancer pain. The side effects studied were constipation, pruritus, nausea and vomiting, myoclonus, sedation, respiratory depression, and delirium. ⋯ The lack of well-designed, randomized controlled trials and the heterogeneity of populations and study designs made the drawing of firm conclusions difficult and precluded performance of meta-analysis. The type, strength, and consistency of evidence for available interventions to manage opioid side effects vary from strong (eg, on the use of naloxone to reverse respiratory depression or constipation) to weak (eg, changing from the oral to epidural route of morphine administration to manage sedation). Well-designed trials in the specified populations are required to furnish clinicians with secure evidence on managing opioid side effects successfully.
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Clinical Trial
The relationship between cognitive appraisal, affect, and catastrophizing in patients with chronic pain.
A study was conducted to clarify the nature of catastrophizing, a construct that is frequently referred to in the chronic pain literature. Information regarding 3 affective experience and 3 affect regulation dimensions was gathered from a heterogeneous sample of 104 chronic pain patients by using a semistructured clinical interview and the Affect Regulation and Experience Q-Sort (AREQ). Self-report questionnaires included visual analog pain scales, the Coping Strategies Questionnaire (CSQ), Multidimensional Pain Inventory (MPI), McGill Pain Questionnaire (MPQ), and Center for Epidemiological Studies Depression scale (CES-D). ⋯ Thirty-one percent of the variance in CSQ-Catastrophizing scores was explained by a combination of cognitive appraisal variables (perceived ability to control pain; MPI Life Control) and AREQ scores, even after adjusting for pain severity and chronicity, age, and sex of participants. Results of the study strongly suggest that, rather than thinking of catastrophizing primarily as a cognitive coping construct, it should be described as an elaborate construct made up of both cognitive appraisal and affective components. Implications for tailoring interventions to match individual styles of affect regulation are discussed.
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Case Reports
Severe intraoperative hypertension and opioid-resistant postoperative pain in a methadone-treated patient.
Patients who are treated with methadone present challenges for the anesthesiologist. We report the untoward effects of rapid preoperative methadone tapering on the operative and perioperative course of a patient who required emergency surgery. The patient's exaggerated stress response to surgery and severe intractable postoperative pain might have resulted from unrecognized methadone withdrawal. Continuation of methadone treatment in patients who have surgery may prevent exaggerated intraoperative hemodynamic responses to surgical stimuli and unnecessary postoperative suffering.
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Clinical Trial
Altering gender role expectations: effects on pain tolerance, pain threshold, and pain ratings.
The literature demonstrating sex differences in pain is sizable. Most explanations for these differences have focused on biologic mechanisms, and only a few studies have examined social learning. The purpose of this study was to examine the contribution of gender-role stereotypes to sex differences in pain. ⋯ Women had briefer tolerance times and higher post-cold pressor ratings than men. When given gender-specific tolerance expectations, men and women did not differ in their pain tolerance, pain threshold, or pain ratings. This is the first empirical study to show that manipulation of expectations alters sex differences in laboratory pain.