Guide to Pain Management in Low-Resource Settings
part of the cultural development of all societies. In the
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- Guide to Pain Management in Low-Resource Settings Olaitan A Soyannwo Chapter 2 Obstacles to Pain Management in Low-Resource Settings
- Is pain management a problem in resource-poor countries
- How do patients handle their pain problems
- Why is it diffi cult to provide eff ective pain management Lack of knowledge
part of the cultural development of all societies. In the
history of pain, “supernatural” powers played an equally important role as natural factors. To view pain as the re- sult of a “communication” between mankind and divine powers has been a fundamental assumption in many societies. Th e more societies are separated from West- ern medicine or modern medicine, the more prevalent is this view of pain. On the other hand, a purely medi- cal theory based on natural phenomena independent of divine powers developed very early on. It happened to a greater extent in ancient China, while in ancient India medicine was heavily infl uenced by Hinduism and Bud- dhism. Pain was perceived in the heart—an assumption familiar to ancient Egyptians. Th e medical practitioners in pharaonic times believed that the composition of body fl uids determined health and disease, and magic was indiscriminable from medicine. Ancient Greek medicine borrowed heavily from its Asian and Egyptian predecessors. Th e intro- duction of ancient medical knowledge into medieval Europe was mainly mediated through Arabic medicine, which also added its own contributions. Latin was the language of scholars in medieval Europe, and ideology was guided by Judeo-Christian beliefs. Despite mul- tiple adaptations, medical theory remained committed to ancient models for centuries. Pain had an important role. Th e Bible illustrates the need to withstand catas- trophes and pain in the story of Job. Strength of faith is proved by Job’s humility toward God. Humility is still an ideal in Christian thought today. In the New Testa- ment, Jesus Christ fi nishes his life on earth as a mar- tyr hanging and dying at the cross. His suff ering marks the way to God. To bear suff ering in life is necessary to be absolved from sin. Th e message of pain is to show mankind the insuffi ciency of life on earth and the bril- liance of being in heaven. Th us, whatever science may say about pain, an approach based only on a physiologi- cal concept does not take into account the religious or spiritual meaning of pain. Th e most important and radically mechanis- tic scientifi c theory of pain in early modern age derives from the French philosopher René Descartes (1596– 1650). In his concept, the former assumption that pain was represented in the heart was relinquished. Th e brain took the place of the heart. In spite of (or because of ) its one-sidedness, Descartes’ theory opened the gate for neuroscience to explain the mechanisms of pain. Th e question of how pain should be treated has led to diff erent answers over time. If supernatural pow- ers had to be pleased to get rid of pain, certain magi- cal rituals had to be performed. If scientifi cally invented remedies were not used or not available, ingredients from plants or animals had to be used to ease the pain. Especially, the knowledge that opium poppies have anal- gesic eff ects was widespread in ancient societies such as Egypt. For a long time, opium was used in various prep- arations, but its chemical constituents were not known. 4 Wilfried Witte and Christoph Stein Th e isolation of the opium alkaloid morphine was fi rst accomplished in 1803 by the German pharmacist Fried- rich Wilhelm Sertürner (1783–1806). Th e industrial production of morphine began in Germany during the 1820s, and in the United States in the 1830s. During the late 18th to the mid-19th century, the natural sciences took over the lead in Western medicine. Th is period marked the beginning of the age of pathophysiological pain theories, and scientifi c knowledge about pain in- creased step by step. Th e discovery of drugs and medical gases was a cornerstone of modern medicine because it allowed improvements in medical treatment. It was modern an- esthesia in particular that promoted the development of surgery. General anesthesia using ether was introduced successfully in Boston on October 16, 1846, by the phy- sician William Th omas Morton (1819–1868). Th e im- portance of this discovery, not only for surgery but for the scientifi c understanding of pain in general, is under- scored by the inscription on his tombstone: “Inventor and Revealer of Inhalation Anesthesia: Before Whom, in All Time, Surgery was Agony; By Whom, Pain in Sur- gery was Averted and Annulled; Since Whom, Science has Control of Pain.” Th is statement suggested that pain would vanish from mankind just by applying anesthe- sia. Surgery itself changed to procedures that were not necessarily connected with a high level of pain. Th us, the role of surgery changed. Surgeons had more time to perform operations, and patients were no longer forced to suff er pain at the hands of their surgeons. Further innovations followed. One year later, in 1847, chloroform was used for the fi rst time for an- esthesia in gynecology by the Scottish physician James Young Simpson (1811–1879). In Vienna, the physi- cian Carl Koller (1857–1944) discovered the anesthetic properties of cocaine in 1884. At about the same time, during the last two decades of the 19th century, the U.S. neurologist James Leonard Corning (1855–1923) and the German surgeon August Bier (1861–1949) carried out trials of spinal anesthesia with cocaine solutions. Modern anesthesia enabled longer and more complex surgical procedures with more successful long-term outcomes. Th is advance promoted the general consen- sus that the relief of somatic pain was good, but it was secondary to curative therapy: no pain treatment was possible without surgery! Th us, within the scope of an- esthetic practice, pain management as a therapeutic goal did not exist at that time. Chronic pain was not a topic at all. Th e fi rst decades of morphine use may be seen as a period of high expectations and optimism regard- ing the ability to control pain. Th e fi rst drawback to this optimism was the discovery made in the Ameri- can Civil War (1861–1865), when cases of morphine dependence and abuse appeared. As a consequence, restrictions on the distribution of opiates were begun. Th e negative view of morphine use was enhanced by experiences in Asia, where an extensive trade in opium and morphine for nonmedical purposes was already established during the 19th century. Th erefore, at the beginning of the 20th century, societal anxiety regard- ing the use of morphine became strong and developed into opiophobia (i.e., the fear of using opioids), which was a major step backwards for pain management in the following decades. Wars stimulated pain research because soldiers returned home with complex pain syndromes, which posed insurmountable problems for the available ther- apeutic repertoire. Following his experience after 1915 during the First World War, the French surgeon René Leriche (1879–1955) began to concentrate on “pain surgery,” mainly addressing the autonomic nervous system. Leriche applied methods of regional anesthe- sia (infi ltration with procaine, sympathetic ganglionic blockade) as well as surgery, particularly periarterial sympathectomy. He not only rejected the idea of pain as a necessary evil but also criticized the reductionist scientifi c approach to experimental pain as a purely neuroscientifi c phenomenon. He viewed chronic pain as a disease in its own right (“douleur-maladie”), not just as a symptom of disease. Regional anesthesia was the mainstay of pain therapy applied by the French surgeon Victor Pauchet (1869–1936). Already, before his experiences in the war, he had authored the fi rst edition of his textbook L’Anesthésie Régionale in 1912. Th rough Louis Gas- ton Labat (1876–1934), a physician from Paris who later practiced in the United States, his wisdom be- came known in the New World and was an important stimulus for the dissemination of regional anesthesia in the United States between the two World Wars. In the 1920s, the notion that regional anesthesia could be used not only for surgery but also for chronic pain spread throughout the United States. After the Second World War these ideas were taken up by John Joseph Bonica (1914–1994), who had emigrated with his parents from Sicily to the United States at the age of 11 years. As an army History, Defi nitions, and Contemporary Viewpoints 5 surgeon entrusted with the responsibility of giv- ing anesthesia, he realized that the care of wounded soldiers was inadequate. Th e patients were left alone with their pain after surgery. Bonica observed that pain frequently became chronic and that many of these patients fell prey to alcohol abuse or depressive disor- ders. Bonica’s answer to this problem, which also af- fected other pain patients, was to establish pain clinics where physicians of diff erent disciplines, psycholo- gists, and other therapists worked together in teams to understand the complexity of chronic pain and treat it adequately. Anesthesiology remained Bonica’s special- ty. Only a few pain clinics existed in the United States when he published the fi rst edition of his textbook Pain Management in 1953. Th is landmark may be re- garded as the date of birth of a new medical discipline. Nevertheless, it took many years before a broader audience became interested in pain therapy. In the year 1973, to make this topic more popular, Bonica founded the International Association for the Study of Pain (IASP). In the following years, national chapters of the IASP were founded around the globe. In 1979, IASP coined the important defi nition of pain as “an unpleas- ant sensory and emotional experience associated with actual or potential tissue damage or described in terms of such damage,” which is still valid. Th is defi nition was important because for the fi rst time it implied that pain is not always a consequence of tissue damage but may occur without it. Western science then began to realize that “somatic” factors (tissue damage) cannot be sepa- rated from “psychological” factors (learning, memory, the soul, and aff ective processes). Together with the rec- ognition of social infl uences on pain perception, these factors form the core of the modern biopsychosocial concept of pain. During the 20th century multiple pain theo- ries were conceived. Th e most important theory—to which Bonica also subscribed—came from the Ca- nadian psychologist Ronald Melzack (1929–) and the British physiologist Patrick D. Wall (1925–2001). Th eir theory was published in 1965 and is known as the “gate control theory.” Th e term “gate” was sup- posed to describe spinal cord mechanisms regulating the transmission of pain impulses between the periph- ery and the brain. Th is theory was important because it no longer regarded the central nervous system as a simple passive medium for transmission of nerve sig- nals. It implied that the nervous system was also “ac- tively” altering transmission of nerve impulses. How- ever, the “gate control theory” emphasized a strictly neurophysiological view of pain, ignoring psychologi- cal factors and cultural infl uences. Medical ethnology examines cultural infl u- ences on perception and expression of pain. Th e most important early study was published in 1952 and was fi nanced by the U.S. Public Health Service. On the basis of about 100 interviews with veterans of both World Wars and the Korean War, who were accommo- dated in a Veterans’ Hospital in the Bronx, New York City, the investigators examined how diff erent cultural backgrounds infl uence pain perception. Th e veter- ans were diff erentiated into those of Italian, Irish, or Jewish origin—besides the group of the “Old Ameri- cans,” comprising U.S.-born Whites, mostly Protestant Christians. One result of this investigation was that the “Old Americans” presented the strongest stoicism in the experience of pain, while their attitude towards pain was characterized as “future-oriented anxiety.” According to the interpretation of the investigators, this anxiety demonstrated an attempt to be conscious about one’s own health. Th e more a Jew or Italian or Irish immigrant was assimilated into the American way of life, the more their behavior and attitudes were similar to those of the “Old Americans.” However, pain was still seen merely as a symptom, and non-Western cultures were not a focus of interest. It took about another three decades to change this situation. During the 1990s, studies demonstrated that diff erent attitudes and beliefs in diff erent ethnic groups around the world play a role in the variation of intensity, duration, and subjective perception of pain. As a consequence, health workers have to realize that pa- tients with (chronic) pain value therapists who recog- nize their cultural and religious beliefs. Another important aspect that attracted inter- est was the relief of pain in patients with advanced dis- ease. It was the nurse, social worker, and later physi- cian Cicely Saunders (1918–2005) who developed the “Total Pain” concept. Chronic pain in advanced disease totally changes everyday life and challenges the will to live. Th is problem is continuously present, so Saunders drew the conclusion that “constant pain needs con- stant control.” According to this concept, pain cannot be separated from the personality and environment of a patient with advanced and fatal illness. Th e founda- tion of St. Christopher’s Hospice in London, England, in 1967 by Saunders may be seen as the starting point of palliative medicine. It refl ects a change of interest in 6 Wilfried Witte and Christoph Stein medicine from acute (infectious) diseases to cancer and other chronic diseases in the fi rst half of the 20th cen- tury. Th e term “palliative care” (or palliative therapy) comes from the Latin word “pallium” (cover, coat) and is supposed to alleviate the last phase of life if curative therapy is no longer possible. Palliative care is, a priori, designed to concentrate on quality of life. It has roots in non-Christian societies, but it is mainly regarded to be in the tradition of medieval hospices. However, the his- torical background of the hospices was not the same in every European country, and neither was the meaning of the word “pallium”; sometimes it was used by healers to disguise their inability to treat patients curatively. Palliative care became even more important when another totally unexpected pandemic occurred in the mid-1980s—HIV/AIDS. Particularly in Africa, this new “plague” rapidly developed into an enormous health problem that could no longer be ignored. Cancer and neuropathic pain play important roles in patients with HIV/AIDS. Th e development of palliative medi- cine in Africa began in Zimbabwe in 1979, followed by South Africa in 1982, Kenya in 1989, and Uganda in 1993. Th e institutions in Uganda became models in the 1990s, based on the initiative of the physician Anne Marriman (1935-), who spent a major part of her life in Asia and Africa. Uganda provided a favorable environ- ment for her project “Hospice Africa Uganda” because at the time Uganda was the only African country whose government declared “palliative care for AIDS and can- cer victims” a priority within its “National Health Plan.” Th e rate of curative cancer treatment in Uganda is low, as in most economically disadvantaged countries. Th is situation makes problems associated with cancer and AIDS all the more urgent. Broad acceptance of chronic pain manage- ment in the 20th century required the leadership of the World Health Organization (WHO), stimulated by Jan Stjernswärd from Sweden (1936–). In 1982, Stjernswärd invited a number of pain experts, includ- ing Bonica, to Milan, Italy, to develop measures for the integration of pain management into common knowledge and medical practice. Cancer was cho- sen as a starting point. At that time, the experts were concerned about the increasing gap between success- ful pain research, on the one hand, and decreasing availability of opioids to patients, especially cancer patients, on the other. A second meeting took place in Geneva in 1984. As a result, the brochure “Cancer Pain Relief ” was published in 1986. In distributing this brochure, the WHO fi lled the gap by “forcing” health care systems to use opioids according to the now widely known three-step “analgesic ladder.” Th e suc- cess of this initiative was, unfortunately, not the same in diff erent regions of the world. While opioid avail- ability and opioid consumption multiplied in the An- glo-American and Western European countries, other regions of the world observed only minor increases or even falling numbers of opioid prescriptions. It must be added, though, that in the Anglo-American and Western European sphere, facilitated access to opioids has promoted an uncritical extension of opioid use to noncancer pain patients as well. Th is use might be jus- tifi ed in cases of neuropathic or chronic infl ammatory pain, but it should be regarded as a misapplication in most other noncancer pain syndromes. Opioids should not be used as a panacea (one remedy working for all), and current practice in some countries might threaten opioid availability in the future if health care authori- ties decide to intervene and restrict opioid use even more than today. In conclusion, the understanding of pain as a major health care problem has come a long way. From the old days, when pain often was regarded as an un- avoidable part of life, which humans could only par- tially infl uence because of its presumed supernatural etiology, a physiological concept has developed, where pain control is now possible. In the last few decades the “natural science” concept has been revised and ex- tended by the acceptance of psychosocial and ethno- cultural infl uencing factors. Although basic research has helped to uncover the complex mechanisms of pain and facilitated the development of new strategies to treat pain, the age-old opioids are still the mainstay of pain management for acute pain, cancer pain, and neuropathic pain. While the understanding and treat- ment of other chronic noncancer pain syndromes are still demanding, cancer pain, acute pain, and neuro- pathic pain may be relieved in a large number of pa- tients with easy treatment algorithms and “simple” opioid and nonopioid analgesics. Th erefore, the future of pain management in both high- and low-resource environments will depend on access to opioids and on the integration of palliative care as a priority in health care systems. Pain Management in Low-Resource Set- tings intends to contribute to this goal in settings where the poor fi nancing of health care systems high- lights the importance of pain management in pallia- tive care. History, Defi nitions, and Contemporary Viewpoints 7 References [1] Bates, MS, Edwards WT, Anderson KO. Ethnocultural infl uences on variation in chronic pain perception. Pain 1993;52:101–12. [2] Brennan F, Carr DB, Cousins M. Pain management: a fundamental hu- man right. Pain Med 2007;105:205–21. [3] El Ansary M, Steigerwald I, Esser S. Egypt: over 5000 years of pain management—cultural and historic aspects. Pain Pract 2003;3:84–7. [4] Eriksen J, Sjøgren P, Bruera E. Critical issues on opioids in chronic non- cancer pain: an epidemiological study. Pain 2006;125:172–9. [5] Jagwe J, Merriman A. Uganda: Delivering analgesia in rural Africa: opioid availability and nurse prescribing. J Pain Symptom Manage 2007;33:547–51. [6] Karenberg A, Leitz C. Headache in magical and medical papyri of An- cient Egypt. Cephalgia 2001;21:545–50. [7] Loeser JD, Treede RD. Th e Kyoto protocol of IASP basic pain terminol- ogy. Pain 2008;137:473–7. [8] Meldrum ML. A capsule history of pain management. JAMA 2008;290:2470–5. [9] Merskey H. Some features of the history of the idea of pain. Pain 1980;9:3–8. [10] Stolberg M. “Cura palliativa”: Begriff und Diskussion der palliativen Krankheitsbehandlung in der vormodernen Medizin (ca. 1500–1850). Medizinhist J 2007;42:7–29. 9 Guide to Pain Management in Low-Resource Settings, edited by Andreas Kopf and Nilesh B. Patel. IASP, Seattle, © 2010. All rights reserved. Th is material may be used for educational and training purposes with proper citation of the source. Not for sale or commercial use. No responsibility is assumed by IASP for any injury and/or damage to persons or property as a matter of product liability, negligence, or from any use of any methods, products, instruction, or ideas contained in the material herein. Because of the rapid advances in the medical sciences, the publisher recommends that there should be independent verifi cation of diagnoses and drug dosages. Th e mention of specifi c pharmaceutical products and any medical procedure does not imply endorsement or recommendation by the editors, authors, or IASP in favor of other medical products or procedures that are not covered in the text. Guide to Pain Management in Low-Resource Settings Olaitan A Soyannwo Chapter 2 Obstacles to Pain Management in Low-Resource Settings Why is eff ective pain management diffi cult to achieve in low-resource countries? Low-income and middle-income economies of the world are sometimes referred to as developing coun- tries, although there are wide diff erences in their eco- nomic and development status, politics, population, and culture. Poverty is, however, a common factor in the health situation of low-resource countries, and it is the main determinant of disease, since most of the popu- lation lives on less than US$1 a day (below the “bread- line”). Malnutrition, infections, and parasitic diseases are prevalent, with high rates of morbidity and mortal- ity, especially in rural areas and among pregnant wom- en and children. Most countries therefore defi ne and implement an “essential health package” (EHP), which is a minimum package of cost-eff ective public health and clinical interventions provided for dealing with major sources of disease burden. Th ese health priorities were addressed in the 2000 United Nations Millennium Development Goals (MDG), which emphasized the eradication of poverty and hunger, universal primary education, gender equal- ity, reduction of child mortality, improvement of ma- ternal health, combating HIV/AIDS, malaria, and other major diseases, environmental sustainability, and global partnership for development. Although communicable diseases are the emphasis, a transition in the epidemiology of diseases even in poor countries is now noticeable as noncommunicable diseases, injuries, and violence are as important as communicable diseases as causes of death and disability. Many of these conditions have accompa- nying pain (acute and chronic), which is inadequately ad- dressed and treated. While there is consensus that stron- ger health systems are key to achieving improved health outcomes, there is less agreement on how to strengthen them. In countries where the average income is below the “breadline,” there is little priority specifi cally for pain is- sues as most people concentrate on working to earn an income regardless of any pain problem. Is pain management a problem in resource-poor countries? Pain is the most common problem that makes patients visit a health care practitioner in low-resource coun- tries. In a WHO study, persistent pain was a commonly reported health problem among primary care patients and was consistently associated with psychological ill- ness. Both acute and chronic cancer and noncancer pains are undertreated, and analgesics may not even be available in rural hospitals. How do patients handle their pain problems? Usually, the fi rst attempt at pain management in these patients is the use of home remedies, including herbal 10 Olaitan A Soyannwo and over-the-counter (OTC) medications. Th ese can be simple analgesics, herbal preparations, or complementa- ry drugs. Self-prescription and recommendations from nonmedical practitioners (friends, relatives, other pa- tients, patent medicine vendors, and traditional medi- cal practitioners) are common. Such recommendations may be eff ective for simple, uncomplicated pain, but when pain is severe or persistent, patients then go to the hospital as a last resort. In the hospital setting, most pain problems are treated by general medical practi- tioners, family physicians, or fi rst-line specialists such as orthopedic surgeons, neurologists, and oncologists. Pain management specialists and dedicated pain clinics or acute pain teams are few and sometimes nonexistent in many resource-poor countries. Th us, although re- lief of pain is part of the fundamental right to the high- est attainable standard of health, this aim is diffi cult to achieve in low-resource countries, where most of the population lives in rural areas. Frequently, health care is delivered by a network of small clinics—some without doctors or essential analgesics. Even when doctors are available, for example for surgery, patients expect pain as an inevitable part of surgical intervention, and de- spite the high incidence of reported pain, may still rate “pain relief ” as satisfactory. Why is it diffi cult to provide eff ective pain management? Lack of knowledge Inadequate knowledge among health care profession- als in low-resource countries is one of the major ob- stacles to eff ective pain management. Comprehensive pain assessment and multimodal treatment approach- es are poorly understood since pain is mostly taught as a symptom of disease rather than an experience with physical, psychosocial, and other dimensions. Lack of training and myths may lead to unreasonable fears of side eff ects of opioid analgesics and errone- ous beliefs about the risk of addiction, even in cancer patients. Patients may also have a poor understanding of their own medical problems, and may expect pain, which they think has to be endured as an inevitable Download 4.8 Kb. Do'stlaringiz bilan baham: |
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