Previous research has indicated that postoperative pain, mood and analgesic requirements are influenced by diverse demographic and psychological variables. The data, however, are inconsistent and the extent of these influences has not been explored using multivariate statistical methods. In the present investigation patients scheduled for elective gallbladder surgery were examined for levels of pain, mood and analgesic needs, and the data were analyzed by using stratified stepwise multiple regression analysis. The results indicate that approximately half of the variability in the postoperative outcome measures could be predicted by a set of variables which include the patient's anxiety, extroversion, depression, educational level, previous chronic pain syndromes, and bias toward using medication. The implications of these results are discussed in relation to pain management strategies for surgical populations.
Although chronic pain is a frequent cause of suffering and disability and is costly to society, there continues to be limited access to specialty pain clinic services. Hence, there is a need for cost-effective, accessible interventions that will help people find ways to better manage this difficult problem. This randomized controlled trial examined the effect of a low-cost, community-based, nurse-delivered, group psychoeducation program entitled the Chronic Pain Self-Management Program (CPSMP). It has a standard protocol that was modified from the successful Arthritis Self-Management Program (ASMP). One hundred and ten individuals with mixed idiopathic chronic pain conditions were enrolled in the study (75% female; mean age 40 years; mean chronicity 6 years) and were randomly assigned to one of two conditions: the 12-h (CPSMP) intervention group, or the 3-month wait-list control group. Self-report measures of pain-related and other quality of life variables as well as two hypothesized mediating variables were collected pre-treatment and 3 months later by assessors blind to group allocation. One hundred and two subjects completed the study. Results of intention-to-treat analysis indicated that the treatment group made significant short-term improvements in pain, dependency, vitality, aspects of role functioning, life satisfaction and in self-efficacy and resourcefulness as compared to the wait-list control group. Because it has a standard protocol, this intervention has the potential to be reliably delivered at low cost in varied urban and rural community settings and hence be more widely accessible to a greater number of people suffering from chronic pain than is currently the case with more specialized pain clinic services. Based on the results of this study, further research evaluating the long-term impact and potential cost savings to the individual and to the health care system is warranted.
Pain was assessed in 2415 randomly selected hospitalized patients. Fifty percent of the sample reported pain at the time of the interview, and 67% had experienced pain during the past 24 h. High levels of pain were more frequent in postpartum women, patients with diseases of the musculoskeletal systems and after injury or poisoning, but in all diagnostic categories there were patients whose lowest pain level in the preceding 24 h was moderate or severe. Patients who had undergone a surgical procedure during the past 7 days were more likely to report moderate or severe pain, but 21% of non-surgical patients reported moderate or severe pain. Twenty percent of those with pain reported that it had existed for more than 6 months. Patients reported significant impairment of function and distress as a consequence of pain. Use of analgesic medications was low overall and even lower for non-surgical patients. A decrease in pain over 3 weeks was predicted by pain of shorter duration, a shorter duration of hospitalization in the past year, and if a surgical procedure had been performed. None of these variables predicted pain resolution between 3 weeks and 3 or 6 months. Impairment of function did not increase with continuing pain but distress did. Medication use remained low at follow-up. The data indicate that current strategies to improve pain management need to be critically reviewed.
The purpose of this study was to examine the effect of continuous transcutaneous electrical nerve stimulation (TENS) near the incision site on post-cesarean pain and on analgesic intake during the early postoperative period. This investigation utilised a 2-group (TENS-treated and placebo TENS-treated), single-blind experimental design. Eighteen multiparous women, each having undergone an elective cesarean delivery, participated in the study. Nine patients received TENS and nine placebo stimulation. The treatment was continuous through to the third day following the day of surgery. The McGill Pain Questionnaire was used to estimate the three most frequent types of post-cesarean-associated pain, and records of the patients' analgesic intake were obtained from hospital charts. The results suggest that TENS was significantly more effective than placebo TENS in reducing cutaneous, movement-associated incisional pain. However, pain resulting from internal structures, i.e., deep pain, afterbirth pain (due to uterine contractions), and the somatic pain associated with decreased peristalsis (gas pains) were not amenable to TENS. No significant differences in analgesic intake were observed. The possible reasons for these findings are discussed.
It has recently been shown that ice massage of the web between the thumb and index finger produces significantly greater relief of dental pain than a placebo control procedure. These results indicate that ice massage may be comparable to transcutaneous electrical stimulation (TES) and acupuncture, and may be mediated by similar neural mechanisms. The purpose of this study was to examine the relative effectiveness of ice massage and TES for the relief of low-back pain. Patients suffering chronic low-back pain were treated with both ice massage and TES. The order of treatments was balanced, and changes in the intensity of pain were measured with the McGill Pain Questionnaire (MPQ). The results show that both methods are equally effective: based on the Pain Rating Index of the MPQ, 67-69% of patients obtained pain relief greater than 33% with each method. The results indicate that ice massage is an effective therapeutic tool, and appears to be more effective than TES for some patients. It may also serve as an additional sensory-modulation method to alternate with TES to overcome adaptation effects. Evidence that cold signals are transmitted to the spinal cord exclusively by A-delta fibers and not by C fibers suggests that ice massage provides a potential method for differentiating among the multiple feedback systems that mediate analgesia produced by different forms of intense sensory input.
The purpose of this secondary analysis was to explore the role of potential risk factors in predicting the development of chronic pain. Linear discriminant function analysis was used to derive a prediction equation that maximized the differences between a group of hospitalized patients experiencing acute pain who developed chronic pain (n = 171) and a group whose pain resolved (n = 200). Patients who developed chronic pain reported a higher pain intensity, higher anxiety and distress, less certainty that their pain would resolve, longer hospitalization, less independence in ambulation, a diagnosis of trauma, and less need for surgery. Recognition of these factors could lead to early identification of those individuals with acute pain who are at risk for developing chronic pain.
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