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      Journal of Pain Research (submit here)

      This international, peer-reviewed Open Access journal by Dove Medical Press focuses on reporting of high-quality laboratory and clinical findings in all fields of pain research and the prevention and management of pain. Sign up for email alerts here.

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      Pain control following inguinal herniorrhaphy: current perspectives

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          Abstract

          Inguinal hernia repair is one of the most common surgeries performed worldwide. With the success of modern hernia repair techniques, recurrence rates have significantly declined, with a lower incidence than the development of chronic postherniorrhaphy inguinal pain (CPIP). The avoidance of CPIP is arguably the most important clinical outcome and has the greatest impact on patient satisfaction, health care utilization, societal cost, and quality of life. The etiology of CPIP is multifactorial, with overlapping neuropathic and nociceptive components contributing to this complex syndrome. Treatment is often challenging, and no definitive treatment algorithm exists. Multidisciplinary management of this complex problem improves outcomes, as treatment must be individualized. Current medical, pharmacologic, interventional, and surgical management strategies are reviewed.

          Most cited references114

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          Algorithm for neuropathic pain treatment: an evidence based proposal.

          New studies of the treatment of neuropathic pain have increased the need for an updated review of randomized, double-blind, placebo-controlled trials to support an evidence based algorithm to treat neuropathic pain conditions. Available studies were identified using a MEDLINE and EMBASE search. One hundred and five studies were included. Numbers needed to treat (NNT) and numbers needed to harm (NNH) were used to compare efficacy and safety of the treatments in different neuropathic pain syndromes. The quality of each trial was assessed. Tricyclic antidepressants and the anticonvulsants gabapentin and pregabalin were the most frequently studied drug classes. In peripheral neuropathic pain, the lowest NNT was for tricyclic antidepressants, followed by opioids and the anticonvulsants gabapentin and pregabalin. For central neuropathic pain there is limited data. NNT and NNH are currently the best way to assess relative efficacy and safety, but the need for dichotomous data, which may have to be estimated retrospectively for old trials, and the methodological complexity of pooling data from small cross-over and large parallel group trials, remain as limitations.
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            Treatment of neuropathic pain: an overview of recent guidelines.

            A number of different treatments for neuropathic pain have been studied, but the literature is sizable, rapidly evolving, and lacks important information about practical aspects of patient management. Under the auspices of the International Association for the Study of Pain (IASP) Neuropathic Pain Special Interest Group (NeuPSIG), a consensus process was used to develop evidence-based guidelines for the pharmacologic management of neuropathic pain that take into account clinical efficacy, adverse effects, impact on health-related quality of life, convenience, and costs. On the basis of randomized clinical trials, medications recommended as first-line treatments for neuropathic pain included certain antidepressants (i.e., tricyclic antidepressants and dual reuptake inhibitors of both serotonin and norepinephrine), calcium channel alpha(2)-delta ligands (i.e., gabapentin and pregabalin), and topical lidocaine. Opioid analgesics and tramadol were recommended as second-line treatments that can be considered for first-line use in selected clinical circumstances. Other medications that generally would be used as third-line treatments include certain other antidepressant and antiepileptic medications, topical capsaicin, mexiletine, and N-methyl-d-aspartate receptor antagonists. Two other national and international associations recently published pharmacologic treatment guidelines for neuropathic pain, which are summarized and contrasted with the NeuPSIG recommendations. Recent guidelines for the use of neurostimulation for the treatment of neuropathic pain also are summarized. For all treatments for neuropathic pain, long-term studies, head-to-head comparisons, and studies of treatment combinations are a priority for future research.
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              Preoperative prediction of severe postoperative pain.

              We developed and validated a prediction rule for the occurrence of early postoperative severe pain in surgical inpatients, using predictors that can be easily documented in a preoperative setting. A cohort of surgical inpatients (n=1416) undergoing various procedures except cardiac surgery and intracranial neurosurgery in a University Hospital were studied. Preoperatively the following predictors were collected: age, gender, type of scheduled surgery, expected incision size, blood pressure, heart rate, Quetelet index, the presence and severity of preoperative pain, health-related quality of life the (SF-36), Spielberger's State-Trait Anxiety Inventory (STAI) and the Amsterdam Preoperative Anxiety and Information Scale (APAIS). The outcome was the presence of severe postoperative pain (defined as Numeric Rating Scale > or =8) within the first hour postoperatively. Multivariate logistic regression in combination with bootstrapping techniques (as a method for internal validation) was used to derive a stable prediction model. Independent predictors of severe postoperative pain were younger age, female gender, level of preoperative pain, incision size and type of surgery. The area under the receiver operator characteristic (ROC) curve was 0.71 (95% CI: 0.68-0.74). Adding APAIS scores (measures of preoperative anxiety and need for information), but not STAI, provided a slightly better model (ROC area 0.73). The reliability of this extended model was good (Hosmer and Lemeshow test p-value 0.78). We have demonstrated that severe postoperative pain early after awakening from general anesthesia can be predicted with a scoring rule, using a small set of variables that can be easily obtained from all patients at the preoperative visit. Before this internally validated preoperative prediction rule can be applied in clinical practice to support anticipatory pain management, external validation in other clinical settings is necessary.
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                Author and article information

                Journal
                J Pain Res
                J Pain Res
                Journal of Pain Research
                Journal of Pain Research
                Dove Medical Press
                1178-7090
                2014
                29 May 2014
                : 7
                : 277-290
                Affiliations
                [1 ]Department of Anesthesiology, UCLA, Los Angeles, CA, USA
                [2 ]Department of Anesthesiology, University of Kansas, Kansas City, KS, USA
                [3 ]Department of Surgery, Lichtenstein Amid Hernia Clinic at UCLA, UCLA, Los Angeles, CA, USA
                Author notes
                Correspondence: David C Chen, Lichtenstein Amid Hernia Clinic at UCLA, 1304 15th Street, Suite 102, Santa Monica, CA 90404, USA, Tel +1 310 319 4080, Email dcchen@ 123456mednet.ucla.edu

                *These authors contributed equally to this work

                Article
                jpr-7-277
                10.2147/JPR.S47005
                4045265
                24920934
                df02aedf-97c6-4885-a3a6-8d923ce3c5ca
                © 2014 Bjurstrom et al. This work is published by Dove Medical Press Limited, and licensed under Creative Commons Attribution – Non Commercial (unported, v3.0) License

                The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

                History
                Categories
                Review

                Anesthesiology & Pain management
                inguinodynia,chronic postherniorrhaphy inguinal pain,inguinal hernia

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