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BehaNdla med TargiNiq.
® paineurope is funded by, and prepared with editorial input from, MUNDIPHARMA AB as a service to pain management 2013: ISSUE 2 Feature the impact of an ageing population on palliative care With significant population ageing comes an increasing demand for optimal, patient-centred palliative care, explains Dr Tony O’Brien Page 4 Opinion defining opioid tolerance and dependency Dr César Margarit Ferri discusses opioid tolerance and dependence with a view to enabling better communication with patients Page 6 Feature effective pain management in survivors of conflict Joint Editors Other highlights … Professor Elon Eisenberg research update Director, Pain Research Unit, Technion Institute of Technology, Haifa, Israel Dr Karen H Simpson’s review of the journals highlights sex differences in pain, gene therapy and neuropathic pain subgroups. Page 2 Professor Margarita Puig Your questions answered Director, Unidad de Investigación en Anestesiología, UAB, Barcelona, Spain Professor Harald Breivik discusses the differences in pain management programmes across Europe. Page 7 Dr Karen H Simpson case study Consultant in anaesthesia and pain medicine, Leeds, UK Dr Dagmar Westerling Smärtmottagningen, Centralsjukhuset i Kristianstad and associate professor, Lunds Universitet, Sweden Dr Martin Johnson GP with a special interest in pain, Yorkshire, UK and honorary senior lecturer in community pain, Cardiff, UK A clinician presents a case of chronic pain management. Two European specialists provide their perspectives on the treatment. Page 10 www.paineurope.com Read current and previous issues free of charge Prescribing information can be found attached to the back cover and/or on the outside back cover Top image: ©iStockphoto/Thinkstock; Middle image: ©iStockphoto/Thinkstock; Bottom image: ©Crown Copyright 2009 Dr Mark Wyldbore and Dr Dominic J Aldington provide a glimpse into the world of battlefield analgesia, its challenges and aims Page 8 2 Research Joint editor comment Dr Karen H Simpson highlights the problem of obesity and its links with pain Obesity is a growing public health problem in industrialised countries. There is regional variation in prevalence, probably related to lifestyle choices. For example, the female obesity rate in the UK is 23.9%, but is much less in Germany (15.6%), Spain (14.4%), France (12.7%) and Italy (9.3%).1 The easy availability of cheap energy-dense foods and lack of regular exercise are some of the factors that have seen the average weight of the population increase.2 Obesity hastens death through cardio vascular problems and diabetes; the World Health Organization statistics report for 2012 showed that 1 in 3 adults had high blood pressure and 1 in 10 had diabetes.3 Obesity is also associated with many chronic pain problems,4 placing a huge burden on the health economy.5 Meta-analysis has shown a strong link between overweight/obesity and back pain resulting in seeking healthcare.6 Studies of children and adolescents with chronic pain also highlight an association with obesity but it is not clear if this is a cause or an effect.7 We know too that pain and obesity together negatively affects quality of life.8 The mechanism of this relationship may include mechanical and metabolic abnormalities, possibly secondary to lifestyle choices. Some studies demonstrate that treatments for obesity reduce pain secondary to weight loss.9,10 It is therefore essential that healthcare providers address and promote the issue of obesity when treating chronic pain. From the Joint Editor, Dr Karen H Simpson, consultant in anaesthesia and pain medicine, Leeds, UK References 1. Eurostat. Overweight and obesity - BMI statistics Available from: http://epp.eurostat.ec.europa.eu/ statistics_explained/index.php/Overweight_and_ obesity_-_BMI_statistics (accessed 9 March 2013). 2. WHO. Obesity and overweight. Fact sheet No 311. Geneva, WHO, 2013. Available from: http://www.who. int/mediacentre/factsheets/fs311/en/ (accessed 9 March 2013). 3. WHO. News release. May 2012 Available from: www.who.int/mediacentre/news/releases/2012/world_ health_statistics_20120516/en/ (accessed 9 March 2013). 4. Hitt HC, McMillen RC, et al. Journal of Pain 2007;8(5):430-436. 5. Von Lengerke T, Krauth C. Maturitas 2011;69(3):220-229. 6. Shiri R, Karppinen J, et al. American Journal of Epidemiology 2010;171(2):135-154. 7. Wilson AC, Samuelson B, et al. Clinical Journal of Pain 2010;26(8):705-711. 8. Hainsworth KR, Davies WH, et al. Clinical Journal of Pain 2009;25(8):715-721. 9. McGoey BV, Deitel M, et al. Journal of Bone and Joint Surgery 1990;72(2):322-323. 10.Shapiro JR, Anderson DA, et al. Journal of Psychosomatic Research 2005;59(5):275-282. www.paineurope.com paineurope 2013: Issue 2 Research UPDATE Pain specialist and joint editor Dr Karen H Simpson reviews the latest research in pain, including papers on sex differences in pain, gene therapy and neuropathic pain subgroups Mogil JS. Sex differences in pain and pain inhibition: multiple explanations of a controversial phenomenon. Nature Reviews Neuroscience 2012;13(12):859-866. For decades, research has indicated that gender differences exist in pain perception, with many common pain problems occurring more frequently in women, for example, migraine, fibromyalgia and IBS. In addition, females typically report more negative responses to pain than males. The sexes also use and benefit from different coping strategies when in pain; females prefer emotion-focused coping, whereas males prefer sensory-focused coping. It is known that emotional focusing increases the affective pain experience of females. We know that important differences exist between men and women in the experience of pain. A majority of patients with chronic pain are women, but it is difficult to determine whether this sex bias corresponds to actual sex differences in pain sensitivity. The paper presents a survey of the available epidemiological and laboratory data that shows that the evidence for clinical and experimental sex differences in pain is overwhelming. Various explanations for this are explored by the author. Williams AC, Eccleston C, et al. Psychological therapies for the management of chronic pain (excluding headache) in adults. Cochrane Database of Systematic Reviews 2012;11:CD007407. This update of a previous 2009 review (Cochrane Database of Systematic Reviews 2009;2:CD007407) should be read by all pain clinicians. The authors are international experts and they have evaluated the effectiveness of psychological therapies for chronic pain compared with treatment as usual, waiting list control (whereby participants receive the intervention after a waiting period) or placebo control for pain, disability, mood and catastrophic thinking. They identified RCTs until September 2011 using good search and exclusion criteria; 42 studies were found and 35 (n=4788) provided data – an impressive cohort. Two authors rated all studies. They compared cognitive behavioural therapy (CBT) and behaviour therapy with two control conditions (treatment as usual; active control) at two assessment points (immediately after treatment and at ≥6 months). They assessed treatment effectiveness for pain, disability, mood and catastrophic thinking. Their findings are fascinating and perhaps do not fit with clinicians’ firmly held beliefs that are often non-evidence based! There is an absence of evidence for behaviour therapy, except a small improvement in mood immediately following treatment when compared with an active control. CBT has small positive effects on disability and catastrophising, but not on pain or mood, when compared with active controls. CBT has small to moderate effects on pain, disability, mood and catastrophising immediately post-treatment when compared with treatment as usual/waiting list, but all except a small effect on mood had disappeared at follow-up. The authors observed that quality of trial design has improved over time but quality of treatments had not. They concluded that different types of studies and analyses are needed to identify which components of CBT work for which type of patient on which outcome/s, and to try to understand why. In times of financial constraints on services we need to find answers to these questions. Saavedra-Hernández M, Castro-Sánchez AM, et al. The contribution of previous episodes of pain, pain intensity, physical impairment, and painrelated fear to disability in patients with chronic mechanical neck pain. American Journal of Physical Medicine and Rehabilitation 2012;91(12):1070-1076. Musculoskeletal neck pain is a common problem and whiplash associated disorder is almost at epidemic proportions in some Western countries. The influence of physical and psychosocial variables on self-rated disability in patients with chronic mechanical neck pain is examined in this interesting study. The authors assessed the relationship of pain, physical impairment, and pain-related fear to disability in individuals with chronic mechanical neck pain. They prospectively recruited Research 3 ©iStockphoto/Thinkstock paineurope 2013: Issue 2 Meetings and events update 12-15 June 2013 Madrid, Spain 2013 Annual European Congress of Rheumatology Website: www.eular.org 14-16 June 2013 Warsaw, Poland 3rd International Conference on Interventional Pain Medicine and Neuromodulation Website: http://www.painandneuromodulationwarsaw.blogspot.co.uk/ 97 subjects with chronic neck pain; 28 men and 69 women with mean age 39 years. They recorded demographic information, duration of pain, pain intensity, pain-related fear, cervical range of motion and self-reported disability (Neck Disability Index). Significant positive correlations existed between disability and previous history of neck pain, pain intensity and kinesiophobia. A significant negative correlation existed between disability and range of motion in cervical extension. Previous neck pain episodes, intensity of neck pain, kinesiophobia, and cervical extension range of motion were significant predictors of disability. The clinical implications of these findings need more detailed study. Goins WF, Cohen JB, et al. Gene therapy for the treatment of chronic peripheral nervous system pain. Neurobiology of Disease 2012;48(2):255-270. Chronic pain affects millions of people worldwide leading to significant morbidity and poor quality of life. Chronic pain can result from many pathological sources, for Further key clinical papers Kiss ZH, Becker WJ. Occipital stimulation for chronic migraine: patient selection and complications. Canadian Journal of Neurological Sciences 2012;39(6):807-812. Warner EA. Opioids for the treatment of chronic noncancer pain. American Journal of Medicine 2012;125(12):1155-1161. Djurasovic M, Glassman SD, et al. Changes in the Oswestry Disability Index that predict improvement after lumbar fusion. Journal of Neurosurgery Spine 2012;17(5):486-490. example, cancer, infectious diseases, autoimmune-related syndromes, trauma and surgery. Current therapies have not provided an effective long-term solution. Medications are often limited by tolerance and the potential for abuse. The efficacy of gene therapy for pain has been reported in numerous preclinical studies. There has also been some encouraging phase I work. For example a replication-defective herpes simplex virus (HSV) vector was used to deliver the human pre-proenkephalin gene, encoding the natural opioid peptides met- and leu-enkephalin, to patients with painful bone metastases. The therapy was well tolerated and patients receiving higher doses of the vector experienced a substantial reduction in their pain scores for up to a month. These early clinical results demonstrate potential for new treatments that may herald other gene therapies for chronic pain. Baron R, Förster M, et al. Subgrouping of patients with neuropathic pain according to pain-related sensory abnormalities: a first step to a stratified treatment approach. Lancet Neurology 2012;11(11):999-1005. Any paper on neuropathic pain (NeP) by this group is a must read! Patients with NeP present with various pain-related sensory abnormalities that form different patterns in individuals. Classifying patients on the basis of individual profiles may reduce heterogeneity and improve trial design. A new classification of neuropathic pain should take into account these subgroups. Such sensory phenotyping has the potential to improve clinical trial design by enriching the study population with potential treatment responders. Eventually it is hoped that this might lead to a stratified treatment approach and, ultimately, to personalised treatment. ●● Dr Karen H Simpson is a consultant in anaesthesia and pain medicine, Leeds, UK 17-20 June 2013 Stockholm, Sweden 9th International Symposium on Pediatric Pain Website: www.ispp2013.org 4-7 September 2013 Glasgow, UK 32nd Annual European Society of Regional Anaesthesia Congress Website: http://www2.kenes.com/esra/Pages/ Home.aspx 18-20 September 2013 Yalta, Ukraine 1st East European Congress on Pain Website: http://www.paincongress.com.ua/ 9-12 October 2013 Florence, Italy 8th Congress of the European Federation of IASP Chapters: Europe Against Pain 2013 Website: http://www1.kenes.com/efic/ www.paineurope.com the home of paineurope online Paineurope.com is a comprehensive and free-to-access portal to information on pain and its management for healthcare professionals within Europe. The website contains an archive of past and present articles from paineurope, in addition to exclusive online content. All articles are peer-reviewed by an editorial advisory board of pain specialists. www.paineurope.com 4 FEATURE paineurope 2013: Issue 2 The impact of an ageing population on palliative care Key learning points ●● By 2050 it is predicted that 26% of the population will be aged 80 and over. ●● Although older people have much to contribute, one challenging aspect of an ageing population is the increasing rate of dementia. ●● Palliative care is now included as part of the care pathway of a wide variety of non-malignant diseases. ●● European Association for Palliative Care (EAPC) and the European Union Geriatric Medicine Society (EUGMS) have jointly called for every older citizen with chronic disease to be offered the best possible palliative care approach wherever they are cared for. Significant population ageing is a worldwide phenomenon. In 1950, there were 205 million persons aged 60 or over in the world. Currently, that figure stands at 810 million and is predicted to increase to 2 billion by 2050. In Europe, 20% of the population is currently aged 60 and older (144 million) and 15% are aged 80 and older (108 million). By 2050, the proportion of the population aged 80 and older will reach 26% (187 million).1 This is the inevitable consequence of declining fertility rates and increasing survival.2 Predictably, this change in demographics will result in greater levels of disability and comorbidity with consequent higher demand for palliative care.3 Increasing longevity is a major public health and social care triumph and reflects the impact of improved nutrition, sanitation, medical advances, improved healthcare, education and economic well-being.2 Thus, increased longevity should be welcomed and celebrated. Nevertheless, all countries are challenged to address the major social, economic and cultural changes associated with this unprece dented shift in demographics. It is how we choose to address these challenges and maximise the opportunities of an ageing population that will determine whether society will reap the benefits of an ageing population.2 homes, many elderly residents are disadvantaged with respect to palliative care services, particularly those in rural areas and those with impaired cognition.5 There is also a high prevalence of chronic pain in these and hospital settings (box 1).6,7 However, older persons are not a homogenous group. It is important to avoid negative stereotyping that leads to the issue being seen as the ‘problem of the elderly’. Individually, older persons may have particular needs and a caring society is charged with identifying and addressing these needs in a respectful and dignified manner. Older persons want to remain active and respected members of society and they undoubtedly have much to contribute.2 The Madrid Plan recognises that older persons make a vast contribution to society. It explicitly calls for the recognition of their contribution and for the inclusion of older persons in decisionmaking processes at all levels.8 End of life A proportion of older people, especially those in late old age, will spend their last year of life in poor health and with a significant burden of palliative care needs associated with co-morbidity, frailty and social isolation.9 The older person approaching ©Comstock/Thinkstock With significant ageing of the population comes an increasing demand for optimal, patient-centred palliative care across a range disease states, explains Dr Tony O’Brien Challenges of an ageing population This demographic change presents particular challenges for elderly and palliative care services. Within the acute hospital setting, numerous factors are identified that hinder the optimal provision of palliative care to elderly patients. These include differences in attitudes towards the care of older people, a focus on curative treatment and lack of resources. Additionally, there is confusion regarding the precise roles of specialist and non-specialist palliative care providers.4 In nursing www.paineurope.com Every older citizen with chronic disease should be offered the best possible palliative care approach FEATURE 5 paineurope 2013: Issue 2 the end of life is likely to suffer from multiple progressive and debilitating diseases rather than a single organ-specific pathology.3 One particularly challenging aspect of an ageing population relates to dementia. The prevalence of dementia rises with age such that approximately one-quarter of people aged 85 years and older have dementia.10 The characteristics of the older members of our societies as described above will ‘inevitably lead to higher demand for palliative care’.3 Palliative care Historically, palliative care was particularly associated with end of life care of patients with cancer. Moreover, palliative care was viewed as a separate and distinct specialty that became relevant only after all other approaches to disease management had failed. This is an entirely discredited and redundant model of care provision. There is now a growing acceptance of the value of early involvement of palliative care in parallel with a whole variety of disease modifying and supportive therapies across a range of malignant and non-malignant disease states. Palliative care is now included in the care pathways of a wide variety of non-malignant diseases such as COPD, cardiac failure, chronic kidney disease, liver failure and dementia. However, we need to move beyond an exclusive focus on disease pathways and specific pathologies; we are concerned with people. As such, it is becoming increasingly absurd to speak about palliative care solely in terms of specific disease states. The vast majority of older patients with palliative care needs are suffering from multiple distinct pathologies and their ultimate needs will be determined by the combined effect and impact of these various pathologies. Therefore, it is far more appropriate to develop strategies based upon a rigorous and dynamic assessment of the total patient need. Services across Europe Palliative care services have evolved at an unequal pace across various European countries. Even within a single country, inequalities may exist in terms of ease of access to appropriate expertise. One useful measure of the impact of palliative care is the national use of medicinal opioid medication. In 2003, the Council of Europe made specific recommendations in this regard:11 ‘Patients must have ready access to all necessary medications, including a variety of opioids in a range of formulations.’ The total global consumption of opioids increased significantly following the publication of the WHO analgesic ladder in 1986. This coincided with a rapid growth in hospice and specialist palliative care services in many countries. However, the global increase in opioid use was not uniform and, even within Europe, considerable variations are noted. There are many reasons for these reported variations including regulatory and attitudinal barriers.12 Cherny et al note that in many countries, excessively zealous or poorly considered laws and regulations designed to restrict the diversion of medicinal opioids into illicit markets profoundly interfere with medical availability of opioids for the relief of pain.13 In 2004, Jerant et al identified significant shortfalls in the quality of palliative care provided to the elderly. They recommend a more integrated, proactive and team-based approach delivered across all care domains that seeks to identify and address the individual palliative care needs of our elderly population in a collaborative and comprehensive way and over a period of time.14 Box 1. Pain in the elderly – key facts6,7 ●● Chronic pain affects more than 50% of older people in the community and more than 80% of nursing home residents. ●● Pain is the most frequently reported symptom by older people, reported by 73% of community-dwelling older people. ●● Pain is present in 67% of elderly hospitalised patients and in a large proportion of cases is either not treated, or not treated adequately. ●● Older people tend to under-report pain, and when they do report it, are likely to be afflicted with greater levels of underlying pathology than younger individuals who report the same level of pain. ●● Common chronic pain conditions in elderly adults include osteoarthritis, postherpetic neuralgia, spinal canal stenosis, cancer, fibromyalgia, post-stroke pain, diabetic peripheral neuropathy and others. Conclusion The vital dialogue between palliative medicine and geriatric medicine has begun. In September 2012, a high level engagement took place at the European Parliament between the European Association for Palliative Care (EAPC) and the European Union Geriatric Medicine Society (EUGMS). A joint initiative was issued that calls upon European governments and EU institutions to ensure that every older citizen with chronic disease, especially at an advanced stage, is offered the best possible palliative care approach wherever they are cared for.15 The provision of an optimal level of palliative care to our older population is a challenge that requires a coordinated and targeted approach by healthcare professionals, national governments and non-governmental agencies. Every effort must be made to ensure that our elderly may live full, active and meaningful lives and that they enjoy an optimal individual quality of life. ●● Dr Tony O’Brien is a consultant physician in palliative medicine at Marymount University Hospice and Cork University Hospital, Ireland References 1. Piers R, Pautex S, et al. Zeitschrift für Gerontologie und Geriatrie 2010;43(6):381-385. 2. UNFPA and HelpAge international. Ageing in the twenty-first century: a celebration and a challenge. United Nations Population Fund, New York & HelpAge International, London, 2012. 3. Hall S, Petkova H, et al. Palliative care for older people: better practices. World Health Organization, Copenhagen, Denmark, 2011. 4. Gardiner C, Cobb M, et al. Age and Ageing 2011;40(2):233-238. 5. Vassal P, Le Coz P, et al. Journal of Palliative Medicine 2009;12(12):1089. 6. IASP. Facts on ‘Pain in Older Persons’. Fact sheet. Available from: www.iasp-pain.org (accessed 23 April 2013). 7. Gianni W, Madaio RA, et al. Archives of Gerontology and Geriatrics 2010;51(3):273-276. 8. United Nations. The Madrid International Plan of Action on Ageing. New York, United Nations, 2002. 9. Rolls L, Seymour JE, et al. Palliative Medicine 2011;25(6):650-657. 10.Ferri CP, Prince M, et al. Lancet 2005;366(9503):2112-2117. 11.6.3 European Health Committee (CDSP). Recommendation Rec (2003) … of the Committee of Ministers to member states on the organisation of palliative care. Explanatory Memorandum (Adopted by the Committee of Ministers on 12 November 2003 at the 860th meeting of the Ministers’ Deputies). 12.Dalal S, Bruera E. Nature Reviews Clinical Oncology 2013;10(2):108-116. 13.Cherny NI, Baselga J, et al. Annals of Oncology 2010;21(3):615-626. 14.Jerant AF, Rahman SA, et al. Annals of Family Medicine 2004;2(1):54-60. 15.EAPC/EUGMS. Better palliative care for older people. Available from: http://www. eapcnet.eu (accessed 4 March 2013). www.paineurope.com 6 opinion paineurope 2013: Issue 2 Defining opioid tolerance and dependency Dr César Margarit Ferri discusses the definitions of opioid tolerance and dependency and explains that both patients and physicians are often confused about them Although opioids have been used to treat patients with chronic cancer and non-cancer pain for many years, when opioids are initiated it can highlight the lack of knowledge regarding some aspects of opioid therapy for both physicians and patients. One of the most important areas is the confusion surrounding the definitions of opioid tolerance and opioid dependency. Existing criteria which relate to substance dependence (the term used in preference to ‘addiction’) have poor applicability when patients are using opioids for pain relief, and the criteria have acted as a source of concern to physicians, patients and carers.1 Definitions Substance abuse problems can be divided into two categories: dependence and abuse. Addiction and physical dependence are not the same; any patient taking opioids has the potential to develop physical dependence and may suffer withdrawal symptoms upon the discontinuation of the opioid.2 Tolerance is defined as a loss of analgesic potency that leads to ever-increasing dose requirements and decreasing effectiveness over time.3 Exposure to a drug (the opioid) induces changes that result in a diminution of one or more of the drug’s effects over time. There are two types of tolerance: innate (genetically determined) and acquired (pharmacokinetic, pharmacodynamic and learned). In contrast to analgesic tolerance, tolerance to opioid-induced side-effects is a desirable consequence of long-term treatment, facilitating upward dose titration to attain satisfactory pain relief.4 Addiction is a more complicated illness: it is a primary, chronic, neurobiological disease with genetic, psychosocial and environmental factors influencing its development and manifestation.2 Addiction is comprised of four core elements (the four C’s):2 ●● compulsive use, ●● inability to control the quantity used, ●● craving the psychological drug effects, and ●● continued use of the drug despite its adverse effects. Addiction should not be confused with physical dependence which is a drug class-specific withdrawal syndrome (for example, pain, insomnia, tachycardia, tachypnoea and diarrhoea) that is produced by the abrupt cessation of a drug, a rapid dose reduction, a decreasing blood level of the drug and/or the administration of an antagonist.2 In the past, patients who had non-optimal pain control using medication and who instigated unauthorised dose escalation were misdiagnosed as addicts (pseudoaddiction); the difference is that when pain is controlled this behaviour disappears.2 www.paineurope.com Table 1. Principles of opioid therapy Principle Management approach Careful selection of patients Screening tools/risk factors Individualised information Informed consent Caution in dose escalation, follow guideline recommendations Monitoring, urine tests Taper and discontinue if no benefit Follow up Detect misuse, abuse and tolerance Referral to secondary care if needed Communication When prescribing opioids, doctors and patients should discuss the goals of treatment, what a successful opioid trial outcome would be, what an unsuccesful trial looks like, as well as the further options available if the trial is unsuccesssful.5 The aim is to alleviate patient fears including ‘What happens if I’m opioid tolerant?’ and ‘Will I become an addict?’. This kind of comprehensive assessment is appreciated by patients, providing an understanding of the goals of treatment, the secondary effects and the monitoring programme.5 Treatment Physicians should treat their patients according a balanced multi modal treatment strategy where established monitoring and global follow up are mandatory.6 The risks and benefits of opioid therapy should be adequately explained to both patients and their carers. Three important principles to follow are:7 ●● titration: titrate against analgesic response and side-effects (with regular assessment), ●● tailoring: treatment should be individualised, and ●● tapering: controlled decrease of any opioid treatment which does not improve pain despite adequate trial. Screening tools may be useful in identifying patients with risk factors for addiction who will need closer follow-up.7 ●● Dr César Margarit Ferri is chief of the pain unit at the anesthesiology-critical care-pain medicine department, Alicante Hospital, Alicante, Spain Go to www.paineurope.com to take part in the reader’s poll and see more opinion articles References 1. Stannard C. All Party Parliamentary Group on Drug Misuse Inquiry Response on behalf of the British Pain Society. Risk of addiction to opioids prescribed for pain relief. British Pain Society, London, 2007. 2. Jan SA. Journal of Managed Care Pharmacy 2010;16(1 Suppl B):S4-8. 3. Benyamin R, Trescot AM, et al. Pain Physician 2008;11(2 Suppl):S105-120. 4. Adriaensen H, Vissers K, et al. Acta Anaesthesiologica Belgica 2003;54(1):37-47. 5. Pohl M, Smith L. Journal of Psychoactive Drugs 2012;44(2):119-124. 6. Snidvongs S, Mehta V. Postgraduate Medical Journal 2012;88(1036):66-72. 7. Kahan M, Wilson L, et al. Canadian Family Physician 2011;57(11):1269-1276. forum 7 paineurope 2013: Issue 2 Discussion Forum Pain expert Professor Harald Breivik offers his views on pain management scenarios presented by clinicians Iris Christa Kohler, Fachpsychologin für Psychotherapie FSP, Praxis, Bern, Switzerland Thank you for this important question. You may have read the paper on prevalence, impact and therapy of chronic non-cancer pain in 15 countries in Europe plus Israel in the European Journal of Pain in 20061 and a similar study documenting prevalence and treatment of pain related to cancer published in the Annals of Oncology in 2009, covering 11 European countries plus Israel.2 Switzerland was represented in the cancer pain survey but not in the non-cancer survey. These and other European studies document the immense burden from chronic pain on individual patients and their families, but also the major cost to health and social budgets.3,4 There are also a number of high-quality studies which show that treatment at a pain clinic will increase the quality of life of pain-patients and reduce the economic burden on health budgets, much more than the cost of running pain clinics.5,6 Cancer pain and chronic non-cancer pain are common health problems in all countries in Europe.1,2 Almost half of the patients indicate that their pain is not managed satisfactorily.1,2 This varies from country to country, but even these large studies are not really powered to find statistically significant differences between countries.1,2 The impression I have of pain medicine in Switzerland is that pain patients there are no worse off than patients in other countries in Europe. This is based on my experience working for almost a year in Bern as a visiting professor of anaesthesiology and pain medicine. A considerable number of excellent pain studies come from Swiss pain clinicians, notably from Bern University Hospital (Inselspital) where Professor Michele Curatolo has been Chair of the Multidisciplinary Pain Centre there for more than 10 years and has been working with clinical pain problems for more than 20 years.7-9 The Swiss Pain Society, a national chapter of the Image reproduced with permissions from Bern University Hospital Q: Several years ago, I read an article which compared the effectiveness of pain management programmes for chronic pain patients across European countries. I can no longer find this article, but I remember that Switzerland was not in a good position. Do you know any European studies that measure this issue? Are there also percentages of the costs for chronic pain in the different countries? I would be very grateful if you could help me. I am a psychotherapist in Switzerland, working to create an ambulant interdisciplinary programme for chronic pain patients, in which training therapy and psychotherapy would be very important. Bern University Hospital (Inselspital) International Association for the Study of Pain has been active in improving pain medicine for many years. However, as in most countries in Europe, in Switzerland there are too few clinical psychologists with interest and experience in pain medicine. Therefore, I am sure you will be very welcome in Bern by physicians as well as other health providers striving to improve the management of acute as well as chronic pain, in cancer as well as non-cancer conditions. ●● Harald Breivik is emeritus professor of anaesthesiology, Universitetet i Oslo, Norway. He is also editor-in-chief of the Scandinavian Journal of Pain References 1. 2. 3. 4. 5. 6. Breivik H, Collett B, et al. European Journal Pain 2006;10(4):287-333. Breivik H, Cherny N, et al. Annals of Oncology 2009;20(8):1420-1433. Gustavsson A, Bjorkman J, et al. European Journal of Pain 2012;16(2):289-299. Raftery MN, Sarma K, et al. Pain 2011;152(5):1096-1103. Heiskanen T, Roine R, et al. Scandinavian Journal of Pain 2012;3(4):201-207. Eriksen J. Long-term chronic non-cancer pain. Epidemiology, health-care utilization, socioeconomy and aspects of treatment. Medical Doctoral Thesis, Faculty of Health Sciences, University of Copenhagen, Copenhagen, 2004. 7. Curatolo M. Scandinavian Journal of Pain 2012:3(4):236-237. 8. Curatolo M. Scandinavian Journal of Pain 2012:3(3):149-150. 9. Sterling M, Hodkinson E, et al. Clinical Journal of Pain 2008;24(2):124-130. YOUR QUESTIONS … What’s your question on pain management? Submit your questions on www.paineurope.com www.paineurope.com 8 FEATURE paineurope 2013: Issue 2 Effective pain management in the armed forces Key learning points ●● The UK Defence Medical Service employs a simple 0-3 pain scoring system and regards a score of 2 or more as analgesic failure. ●● Analgesic options in field hospitals are the same as other hospitals in the UK. ●● For repatriation, a robust plan is put in place to provide additional analgesia if necessary. ●● Persistent problematic pain is uncommon among British military casualties and the military pain management system may prove a good model for other services. It is a common misconception that battle injuries do not hurt as much as civilian accidents.1 A survey of battlefield casualties demonstrated that two-thirds of those who could remember recalled their pain as severe.2 In an attempt to describe trauma pain management this article will focus on the system used by the UK Defence Medical Services (DMS) to provide effective analgesia as early as possible after injury and throughout retrieval, resuscitation and eventual rehabilitation. This is a pathway that stretches over many thousands of kilometres and many months. The DMS uses a 0-3 pain scoring system to evaluate pain3 and to direct administration of analgesia. This system provides a simple, robust, clinically significant score that guides treatment options. A score of 2 or more is taken to represent a failure of treatment and further treatment is required.4 The use of continuous peripheral nerve catheters and epidurals has increased in recent conflicts as a consequence of a high number of limb injuries and the availability of robust portable ultrasound machines. These are very effective,7,8 but carry concerns over masking compartment syndrome. To reduce the risk of compartment syndrome surgeons are encouraged to perform prophylactic fasciotomies in casualties at risk.9 The second concern is the coagulopathy associated with major trauma. For peripheral nerve catheters we follow the guidance of the Association of Anaesthetists of Great Britain and Ireland (in press), but it is particularly worrying in bilateral lower limb amputees with epidurals since many of the traditional signs of an epidural haematoma, such as limb weakness, will be missing. As a result, a system has been designed to increase the vigilance of the medical staff.10 Prior to repatriation a casualty will be assessed by the acute pain team, in communication with the aeromedical team to ensure adequate analgesia with a robust plan for increasing analgesia as necessary. This will often include adding a morphine PCA to the regimen in case of nerve catheter displacement or acute exacerbations in pain due to movement during the transfer.11 On arrival at the Royal Centre for Defence Medicine (RCDM) in Birmingham, UK casualties’ analgesic needs will be monitored and tailored on a daily basis by the pain service. Once life-saving ©Crown Copyright 2007 In battlefield analgesia the aim is to provide effective relief as soon as possible and throughout the repatriation and rehabilitation process, Dr Mark Wyldbore and Dr Dominic J Aldington explain Immediate analgesia The cornerstone of battlefield analgesia remains the morphine auto injector,5 a spring-loaded syringe that delivers 10mg intramuscular morphine. The British forces are rare in that these are issued to all soldiers, and all deploying personnel are trained in their use. Further analgesia in the pre-hospital environment will depend on the severity of the pain and the experience of the person administering the drugs. These include paracetamol, ibuprofen, additional morphine, fentanyl lozenges and ketamine. Once in the field hospital the analgesic options are the same as for any hospital in the UK, and include morphine patient controlled analgesia (PCA). Casualties are triaged and the more seriously injured are taken to the operating theatre, often within minutes of their arrival. The less severely injured will have their pain scores re-assessed and will be started on a multimodal analgesic regimen. Patients with significant nerve injury will be started on amitrip tyline and pregabalin as early as possible.6 www.paineurope.com A surgeon carries out an operation on a gunshot wound in the operating theatre at the Camp Bastion Medical Facility, Helmand, Afghanistan FEATURE 9 ©Crown Copyright 2009 paineurope 2013: Issue 2 Troops carry a wounded comrade to a Blackhawk medivac helicopter interventions are no longer required, the focus moves to rehabilitation and the development of an analgesic regimen that will facilitate this. part of the aim of their treatment being to make them experts in their own pain control. Rehabilitation The final thread, and possibly the most important, is the structure of the system. The entire process is overseen by the Military Pain Special Interest Group that reports in turn to the defence consultant advisor in anaesthesia. Within this group there is a recognised subject matter expert in pain who is in effect the ‘pain czar’. Having this focus to coordinate an integrated and sustainable pain management service is probably the one significant difference between the military approach to managing survivors of trauma and the civilian version. Although battlefield injuries are significantly painful, problems with persistent pain following trauma are thankfully relatively uncommon among British military casualties. The reasons for this remain unclear but may relate to the system that has been developed. If that is the case, then this should serve as a good model for any trauma pain management service, military or civilian. Rehabilitation generally takes place at the Defence Medical Rehabilitation Centre (DMRC), currently at Headley Court, Surrey, UK. If during rehabilitation the analgesic regimen is not considered optimal the casualties are referred to the pain clinic. Contrary to popular belief, persistent pain is not often a problem in this group. More often than not they are keen to reduce rather than increase their pain medications. The idea that the ‘soldier’s disease’ of opioid dependence is prevalent appears to be a myth.12,13 The prevalence of post-traumatic stress disorder (PTSD) is much lower than many believe, currently effecting approximately 4% of soldiers returning from Iraq or Afghanistan.14 Although this has to be recognised, it is not within the remit of the pain clinic to manage; specialist services exist for this as with any other co-morbidity. The pain clinic at DMRC has one very clear aim: to optimise pain management in an attempt to optimise rehabilitation. If the clinic’s interventions will not do this, and therefore will not help keep an individual employed within the military, this has to be recognised early and must have an effect on the treatments proposed; in many senses it is an ‘occupational pain clinic’. Audit and research After the clinical component, efforts are made to support clinical audit and research. Research is difficult because the numbers of casualties are relatively low and the conditions in which they exist are not always conducive to research. Surveys are used and where possible civilian data is used and extrapolated to this population.15 Education Education is another important thread in the military’s approach to managing the pain of conflict. By giving training to all personnel and more advanced training to clinical practitioners, a group awareness and sense of taking responsibility for pain is developed. This concept of education extends to the casualties themselves, with Processes and procedures ●● Dr Mark Wyldboreis a senior anaesthetic trainee in London, UK. He is also a Major in the Royal Army Medical Corps. Dr Dominic J Aldington works as a consultant in pain medicine for both the National Health Service and the Defence Medical Services, UK. He is a Lieutenant Colonel in the Royal Army Medical Corps References 1. Beecher HK. Annals of Surgery 1946;123(1):96-105. 2. Aldington DJ, McQuay HJ, Moore RA. Philosophical transactions of the Royal Society of London. Series B, Biological Sciences 2011;366(1562):268-275. 3. Looker J, Aldington D. Journal of the Royal Army Medical Corps 2009;155(1):42-43. 4. Moore RA, Straube S, et al. Anaesthesia 2013;68(4):400-412. 5. Gaunt C, Gill J, et al. Journal of the Royal Army Medical Corps 2009;155(1):46-49. 6. Aldington D. Current Opinion in Supportive and Palliative Care 2012;6(2):172-176. 7. Woods KL, Aldington D. Journal of the Royal Army Medical Corps 2010;156(4 Suppl 1):393-397. 8. Hughes S, Birt D. Journal of the Royal Army Medical Corps 2009;155(1):57-58. 9. Clasper JC, Aldington DJ. Journal of the Royal Army Medical Corps 2010;156(2):77-78. 10.Wood PR, Haldane AG, et al. Journal of the Royal Army Medical Corps 2010;156(4 Suppl 1):308-310. 11.Flutter C, Ruth M, et al. Journal of the Royal Army Medical Corps. 2009;155(1):61-63. 12.Hickman TA. The Journal of American History. Oxford University Press; 2004;90(4):1269-1294. 13. Jagdish S, Aldington D, et al. Journal of the Royal Army Medical Corps. 2009;155(1):64-66. 14.Fear NT, Jones M, et al. The Lancet 2010;375(9728):1783-1797. 15.Park CL, Roberts DE, et al. Journal of the Royal Army Medical Corps 2010;156(4 Suppl 1):295-300. www.paineurope.com 10 CASE STUDY paineurope 2013: Issue 2 Managing a chronic pain patient in the perioperative period This challenging case required a combined analgesia method, pre- and perioperative education and opioid rotations, as Professor Andreas Kopf describes Background The American Society of Anesthesiologists (ASA) has published practice guidelines for management of acute perioperative pain and for chronic pain.1,2 However these guidelines and other publications do not specifically consider management of the chronic pain patient in the perioperative setting. Thus whilst published recommendations for the management of chronic pain patients perioperatively are relevant, there is no evidence base. Case assessment A 69-year-old man had been a ‘chronic low back pain patient’ for more than 20 years. His therapy included physiotherapy, repeated periradicular and facet joint injections, stabilising surgery (two years previously) and increasing dosages of different opioids. He was to be considered for further surgery. The anaesthesiologist in the preoperative anaesthesia evaluation identified the perioperative risks of a chronic opioid-dependent pain patient. At that time the patient was complaining of unrelieved thoraco-lumbar pain with a visual analogue scale (VAS) pain score of 8 out of 10. He was using transdermal fentanyl patches at a dose of 200 microgram/hour (oral morphine equivalence approximately 600mg in 24 hours). He was scheduled for a revision spondylodesis surgery because of extension instability. Because of major comorbidity (two recent myocardial infarctions), it was planned to place an epidural catheter intraoperatively for the postoperative analgesia. Due to the expected sudden drop of opioid demand in the period of epidural analgesia the transdermal fentanyl patch dosage was reduced by 50% and replaced by a 4mg/hour IV infusion of morphine to better be able to control withdrawal and overdosing. The epidural was managed with bupivacaine 0.175% (6-10mL/hour depending on the analgesia level). Preoperative education took place with twice-daily supportive conversations for seven consecutive days by a communication-trained pain nurse. On postoperative day 6 the epidural analgesia was switched to oral oxycodone (the calculated equianalgesic dose of 150mg/day of oxycodone was reduced by 20% to 120mg/day because of presumed incomplete cross tolerance). Psychiatric assessment revealed moderate depressive comorbidity, hence duloxetine 60mg in the morning and mirtazapine 30mg at night were started for mood stabilisation. In the postoperative period, the opioid dosage was able to be reduced stepwise to 60mg/day of oxycodone. Owing to a recurrent problem of constipation the oxycodone was given in the form of prolonged release combined oral oxycodone 30mg/ naloxone 15mg twice daily (Targin®*). Follow-up was arranged with our outpatient pain team. www.paineurope.com Key learning points ●● The chronic pain patient with and without chronic opioid medication is at risk for under- and overtreatment perioperatively. ●● Careful planning of the perioperative period by the anaesthesiologist, the pain service and the surgeon is crucial. ●● Epidural analgesia requires reduction of preoperative opioid doses to a maximum of 50% to avoid withdrawal as well as continuous post-anaesthesia care unit-monitoring for the first 24 hours. ●● Brief cognitive behavioural interventions pre- and postoperatively contribute to successful pain management. ●● The perioperative period may be used to re-evaluate the patient’s opioid requirements. ●● A follow-up by an experienced pain management service should be available after discharge of the chronic pain patient. ●● Individualised assessment by a pain management team is necessary for this increasing group of patients. Figure 1. Pedicle subtraction osteotomy L3 and revision spondylodesis T9 to S1. Postoperative CT with dorsal spondylodesis extension T9 to S1 with correct positioning of material (actual patient) Discussion Chronic pain patients are often managed with opioids, cyclooxygenase inhibitors (selective and non-selective) and/or co-analgesics, often antidepressants and anticonvulsants. These patients frequently have comorbid conditions including loss of cardiovascular fitness, neurological deficits caused by the chronic pain or following previous surgeries, and polypharmacy including opioid tolerance, drug-interactions and chronic side-effects.3-9 Undertreatment with opioids in the perioperative period may pass unnoticed and result in opioid withdrawal in chronic pain patients receiving prior high-dose opioid therapy. This may result in serious cardiopulmonary strain. Patients with a long history of opioid use and tolerance may require higher opioid dosages to effectively treat postoperative pain than other patients. Chronic pain patients with prior opioid consumption have been observed to have higher pain readings postoperatively with both IV patient-controlled analgesia (PCA) and epidural analgesia. PCA-use is significantly increased beyond mere replacement of preoperative doses.3-9 In the Minnesota Multiphasic Personality Inventory (MMPI), chronic pain patients score highly on the hypochondria and hysteria scales. This can be relevant to the perioperative period and it is important for clinicians to be on the look-out for inappropriate CASE STUDY 11 paineurope 2013: Issue 2 behaviours. Uncontrolled anxiety is another factor that may complicate postoperative recovery. Simple cognitive behavioural approaches are useful in decreasing the patients’ distress, helping the patient regain control and improve daily functioning.3-9 ●● Dr Andreas Kopfis professor of clinical physiology, University of Nairobi, Kenya, and Director of the Pain Clinic, Charité University Medicine Berlin, Campus Benjamin Franklin, Germany * Targin® is licensed for severe pain which can be adequately managed only with opioid analgesics. Targin® is also known as Targiniq® and Targinact® in other countries. Prescribing information can be found attached to the back cover and/or on the outside back cover. References 1. American Society of Anesthesiologists Task Force on Acute Pain Management. Anesthesiology 2012;116(2):248-273. 2. American Society of Anesthesiologists Task Force on Chronic Pain Management; American Society of Regional Anesthesia and Pain Medicine. Anesthesiology 2010;112(4):810-833. 3. Rozen D, Grass GW. Pain Practice 2005;5(1):18-32. 4. Carroll IR, Angst MS, et al. Regional Anesthesia and Pain Medicine 2004;29(6):576-591. 5. Stein C, Reinecke H, et al. Current Opinion in Anaesthesiology 2010;23(5):598-601. 6. Hadi I, Morley-Forster PK, et al. Canadian Journal of Anesthesia 2006;53(12):1190-1199. 7. Pogatzki-Zahn EM, et al. Current Opinion in Anaesthesiology 2009;22(5):627-633. 8. Farrell C, McConaghy P. British Medical Journal 2012;345:e4148. 9. Kopf A, Banzhaf A, et al. Best Practice & Research Clinical Anaesthesiology 2005;19(1):59-76. Case review: Ireland Dr Liam Conroy Department of pain medicine, Mercy University Hospital, Cork, Ireland This is an interesting case from a number of perspectives: Firstly, the patient suffered from chronic low back pain for 20 years with ongoing interventional therapy and systemic opioid therapy of transdermal fentanyl 200 microgram/hour. Despite this potent opioid therapy the patient reported his pain at 8/10. Secondly, revision spondylodesis is a major anaesthetic and surgical undertaking in any patient, not least one with significant cardiac disease. In most cases such as these, the conventional practice is to continue the background chronic pain medication and to employ supplementary analgesic techniques such as opioid patientcontrolled analgesia or neuraxial blockade, as was employed in this case, in order to contribute to opioid-independent analgesia. It would not be my practice to switch opioids as was done in this case (transdermal fentanyl was converted to IV morphine at a rate of 4mg/hour). Later this regimen was further altered by a switch to oral oxycodone. It would be my preference to keep prescribing as simple as possible in these situations, to avoid potential pitfalls due to incomplete cross tolerance, opioid-induced hyperalgesia and physical dependence. I also feel that opioid dosage reduction in this setting is a complex undertaking.1 I must admit that I am envious of the author’s ability to utilise the services of readily available CBT conducted on a twice-daily basis by an experienced pain nurse. Finally, it is worth mentioning exciting new work on the use of ketamine infusions in perioperative period in patients using long-term opioid therapy for chronic pain (see Loftus et al 2010).2 References 1. Gordon D, Inturrisi CE, et al. Journal of Pain 2008;9(5):383-387. 2. Loftus RW, Yeager MP, et al. Anesthesiology 2010;113(3):639-646. Case review: Israel Dr Simon Wein Pain and Palliative Care Service, Davidoff Center, Rabin Medical Center, Petach Tikvah, Israel The case presented raises practical issues about opioid management of chronic non-malignant pain and what to do perioperatively. It is important to know how much opioid the patient is receiving preoperatively. This is an essential first step to planning perioperative opioid requirements.1 The other important point in calculating equianalgesic doses is the need to reduce the new opioid dose by up to 25% because of incomplete cross-tolerance between opioids. A prudent rule-of-thumb, as pointed out in the case report, is to reduce the calculated morphine equivalent (oral) daily dose by at least 50%. Although opioid withdrawal is unlikely, poor pain control may be a problem which can be readily solved by a short-acting opioid via a patient-controlled analgesia set-up. It is also important not to neglect using co-analgesics such as paracetamol (IV), NSAIDs and tramadol.2 This multi-drug approach takes into account multiple pain mechanisms.3 One final factor, as noted by the author, is the bi-directionality of pain and anxiety. Chronic pain patients with depressive or anxiety disorders often receive higher doses of opioids and are at increased risk for overdose.4 One should never treat severe pain with benzodiazepines alone, nor treat existential anxiety with opioids alone. To avoid this, it is imperative to take a careful history and examination, correlate clinical with radiological findings and of no lesser importance, to share notes with the family doctor and the psychosocial team.5 References 1. Lawlor P, Pereira J, et al. Dose ratios among different opioids: underlying issues and an update on the use of the equianalgesic table. In: Bruera E, Portenoy RK (editors). Topics in Palliative Care, Volume 5. Oxford University Press, New York, 2001. 2. Myles PS, Power I. The Lancet 2007;369(9564):810-812. 3. Elia N, Lysakowski C, et al. Anesthesiology 2005;103(6):1296-1304. 4. Boyer EW. New England Journal of Medicine 2012;367(2):146-155. 5. Turk DC, Okifuji A. Journal of Consulting and Clinical Psychology 2002;70(3):678-690. Visit www.paineurope.com to see more discussion from the case study reviewers and to read further case studies on all aspects of chronic pain management Published by Haymarket Medical, 174 Hammersmith Road, London W6 7JP, UK email: paineurope@haymarket.com web: www.paineurope.com Paineurope is funded by, and prepared with editorial input from, Mundipharma International Limited, Cambridge Science Park, Milton Road, Cambridge CB4 0AB, UK. To register for regular copies or apply for further copies of this issue, please contact Mundipharma AB, Mölndalsvägen 30B, 41263 Göteberg, Sweden. Senior project editor: Philip MacDonald; Managing editor: Hannah Cottle; Producer: Stephanie Jackson; Commercial director: Sandie Pears; Project manager: Lindsay Bishop; Group art editor: Pauline Lock; Deputy production manager: Lucy Flatman; Senior commercial director: Clair McHale; Medical director: Robert Brines; Medical education director: Richard Yarwood; Director: Jenny Gowans. The views expressed in this publication are those of the authors and not necessarily those of Haymarket Medical, the Joint Editors, Mundipharma International Limited, or its independent associated companies. Readers are advised to make their own further enquiries of manufacturers or specialists in relation to particular drugs, treatments or advice. The sponsor, publisher, editorial board, printer and their respective employees, officers and agents cannot accept liability for errors or omissions. No part of this publication may be reproduced in any form without the written permission of the publisher, application for which should be made to the publisher. ©2013 Haymarket Medical Media Limited. Not for resale. Date of preparation: April 2013. Item code: MINT/PPR-13018 Haymarket is certified by BSI to environmental standard ISO 14001 www.paineurope.com LINDH & PARTNERS Kan du se att hon får en opioid mot svår smärta? Kan du se att hon har fått förstoppning och att laxantia inte räcker? Nu när du vet det. Vad gör du då? BehaNdla med TargiNiq.® (oxikodon/naloxon) Oxikodon behandlar effektivt svår smärta medan naloxon motverkar opioidinducerad obstipation. Targiniq® (oxikodon/naloxon) innehåller en opioid. indikation: Svår smärta där endast opioider erbjuder tillräcklig analgetisk effekt. Med opioidantagonisten naloxon motverkas opioidinducerad förstoppning genom att oxikodons lokala effekt i tarmen blockeras. N02AA55. Beroendeframkallande medel. Iakttag största försiktighet vid förskrivning av detta läkemedel. Targiniq® depottabletter 5 mg/2,5 mg, 10 mg/5 mg, 20 mg/10 mg och 40 mg/20 mg, 28 och 98 st. , (F). Texten är baserad på produktresumé: 11-10-21. För mer viktig information och pris se www.fass.se. Begränsning av subvention: Begränsas till patienter som redan behandlas med oxikodon och trots pågående laxativ behandling har besvärande förstoppning. Mundipharma AB • Mölndalsvägen 30B • 412 63 Göteborg • Tel 031-773 75 30 • www.mundipharma.se 11–TAR–53–SL Kan du se att den här kvinnan har cancer?