Guide to Pain Management in Low-Resource Settings
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- What are the causes and risk factors for lung cancer
- How does lung cancer start
- What are the disease trajectory and treatment options
- What are the treatment options in advanced lung cancer
- Are there therapeutic alternatives to surgery, chemotherapy, and radiotherapy
- What are the consequences of dyspnea, and how is it treated
- Besides dyspnea, what else should be considered in the treatment of lung cancer
Case report—part one Mr. Tarik Al-Khater is a 65-year-old man with an ath- letic constitution. He used to work as a postman in Bar- bar, Northern Sudan, and remained active doing fi tness exercises until a year ago. Twenty years ago, he had quit smoking, having accumulated 10 “pack years” (one “pack year” means smoking 20 cigarettes per day throughout one year). Up to 2 years ago, he had never been ill, though he had undergone an appendectomy and osteosynthet- ic surgery for a tibial fracture. Th en at the age of 63, he received a diagnosis of pulmonary emphysema and dia- betes mellitus. Nine months ago, he suff ered a herniated lumbar disk and underwent surgery because of muscle weakness of the right thighs. Furthermore, there remained a mixed pain syndrome of the lower back, right hip, and right knee, with a dominating neuropathic component (burning pain). Mr. K. sought consultation with his doc- tor, who established a successful medication regimen with a combination of tramadol and carbamazepine. Being able to move a lot better, Mr. K. became more aware of his dyspnea and exhaustion following relatively short dis- tances of walking. His wife also noticed that he had sig- nifi cant weight loss and a constant cough during the last couple of months. An X-ray of the thorax showed a prom- inence of the right hilum of the lung. He was sent to Atba- ra for further examination. Unfortunately, the CT detect- ed a central tumor of the right bronchial system, which by bronchoscopy was histologically classifi ed as a non-small- cell lung cancer. Furthermore, scintigraphic and X-ray ex- aminations reveal scattered bone metastases, such as in the lumbar spine and the right knee. What are the causes and risk factors for lung cancer? Th ere are endogenous factors for the onset of lung can- cer (genetic disposition, active HIV infection, pulmo- nary fi brosis, and scarring following parenchyma injury or tuberculosis). Exogenous conditions considered as risk factors are smoking in the fi rst place (partly respon- sible in 90% of lung cancer deaths) as well as exposure to dust and particles such as asbestos, chromates, and polycyclic aromatics or to radiation from uranium, ra- don, or even medical radiation therapy. 164 Th omas Jehser How does lung cancer start? Bronchial carcinomas mostly start in the central airway region and less often in the more peripheral smaller bronchi. Th e fi rst and most noticeable symptom is a nonproductive persistent cough (suspicious when last- ing longer than 6 weeks). Other primary symptoms are hemoptysis, dyspnea or chest pain, and rarer symptoms are hoarseness, anxiety, fever, and mucoid expectoration or paraneoplastic syndromes or signs following any kind of early metastasis (Box 1). Th e histological analysis dif- ferentiates small-cell (13%) from non-small-cell (81%) carcinomas. Six percent of analyses deliver no distinct result (anaplastic carcinoma). Other malignancies or space-consuming processes of the thorax are pleural mesotheliomas, thymomas, metastases of extrathoracic tumors, or infectious diseases (Box 2). An accurate dif- ferential diagnosis of thoracic discomfort therefore has to consider tumorous illnesses. Case report—part two Unfortunately, tumor metastasis was detected at the moment of initial diagnosis, and the primary growth was located in a very central position. Breathing ca- pacity—when tested—was limited to a FEV 1 of 1.1 L. Th erefore it was decided that a surgical resection would be impossible. For symptomatic treatment, Mr. K. was treated by radiotherapy at the tumor region (cumulative dose of 46 Gy) following radiation of the bone metastasis at the spine (36 Gy) and the knee (8 Gy). In the course of treatment, blood testing revealed elevated hepatic transaminases. Since no hepatic me- tastasis was found, the carbamazepine component of the pain medication was suspected to be responsible. After the completion of radiotherapy, Mr. K. experi- enced much better breathing and almost no pain, al- though the medication had been reduced to metamizol q.i.d. and tramadol p.r.n. What are the disease trajectory and treatment options? Tumor diseases may cause local, regional, and systemic functional disorders, symptoms, and complications. Th e local eff ects of lung cancer are airway obstruction and infi ltration of neighboring tissues. Th is may lead to mu- coid impaction, retrostenotic pneumonia, hemorrhage, or pleural eff usion. Th e regional spreading of the tumor follows continuous infi ltration of the mediastinum, the pleura, or the axilla or spreads via local lymph vessels. Symptoms of regional spreading are weakness; loss of appetite and weight; congestion of head and neck vessels; infi ltration into the mediastinum, axilla, and chest wall with mixed pain in the arm, shoulder, chest and upper back; dysphagia; or neurological dis- orders (palsy of the arm, Horner syndrome, or para- plegia). Th e systemic dissemination of primary lung tumors via the bloodstream or lymphatic pathways causes symptoms and disorders according to the quan- tity and location of the metastases. Patients may now suff er from neurological, metabolic, cardiovascular or gastrointestinal disorders (Box 3). Common locations of dissemination of lung cancer are thoracic and cer- vical lymph nodes, bone, pleura, the brain and its lin- ings, the liver, and the adrenal glands. Very seldom are the spleen, heart, skin, eye (choroid coat), kidney, or pancreas affl icted. Box 1. Common symptoms of beginning lung cancer Persistent cough Hemoptysis Dyspnea Chest pain Hoarseness Fever, mucoid impaction Other pain locations Loss of appetite, weight, and strength Paraneoplastic syndromes Cushing syndrome Herpes zoster Peripheral neuropathy Venous thrombosis Box 2. Common extrathoracic diseases and infections with pulmonary manifestation Breast cancer Rectal cancer Renal cancer Malignant melanoma Sarcomas Aspergillosis Tuberculosis Helminthiasis Lung Cancer with Breathing Problems 165 Case report—part three Mr. K. has been ill with lung cancer for 7 months now. Four weeks ago, he lost his appetite, and he feels sick quite often. He has lost weight continuously (about 30% of his initial body weight within one and a half years). Although carbamazepine has been stopped, the blood tests show high values for liver transaminases, accompa- nied by upper abdominal pain. A physical examination reveals an upper abdominal mass, and ultrasonography detects multiple metastases in the liver and also in both adrenal glands. The oncologist recommends chemotherapy, which would have to be conducted in the regional hos- pital. Mr. K. is reluctant to return to the hospital in Atbara, the capital, and asks his friends and relatives for information on traditional treatment options they might have heard of. What are the treatment options in advanced lung cancer? Treatment options include: • Surgical therapy (curative or palliative) • Radiotherapy (neoadjuvant, palliative, or symptom- targeted) • Chemotherapy and other pharmacological therapy (palliative) • Naturopathy (palliative) • Palliative care (adjuvant) Of course, the very best therapy would be the prevention of risk factors, but primary prevention pro- cedures are not established. Diagnostic evaluation at the earliest time is crucial for the course of the illness. Curative surgery needs the diagnosis of a low stage of disease (0–IIIa) in order to make eradication of the tumor possible by resection. Potential techniques include lobe resection, (pleuro-) pneumonectomy, or bronchial reconstruction. Additional options are dissec- tions of lymph nodes and reconstruction of pericardium and blood vessels. Th e degree of ventilatory restriction depends on the magnitude of resection. Surgical treat- ment needs to be conducted in a specialized clinical de- partment. Postoperative rehabilitation is possible in the outpatient setting and must not be disregarded. Palliative surgery is done to remove metastases of extrathoracic tumors or local relapse as well as for draining of second- ary infection such as empyema. Endoscopic or vascular interventions help with the reopening of airways and vessels by stenting or by laser or cryoextraction. Radiotherapy alone cannot be used with a cu- rative intention. In combination with chemotherapy, it may reduce the size of the tumor (downstaging), which might open the route to successful surgery (neoadjuvant strategy) and to an extension of survival time. Palliative radiotherapy intends to reduce the activity of metasta- ses, which may result in reduction of pain (bones, liver, CNS, and pleura), blood congestion (superior vena cava syndrome caused by lymph node metastases of the me- diastinum), or neurological disorders (CNS). Systemic pharmacological therapies (chemo- therapeutic, antihormone therapy, and others) work in a palliative way to reduce the bulk mass or the tu- mor growth rate, allowing prolongation of survival. Th eir application usually weakens the general condi- tion of the patient. It is therefore necessary to consid- er the quality of life of individual patients from their personal perspective. Are there therapeutic alternatives to surgery, chemotherapy, and radiotherapy? Alternative (or complimentary) treatment strategies are based on traditional and empirical concepts. Th ey may be looked at as palliative and should not replace sci- entifi c medical eff orts. Using a palliative perspective, these strategies may very well be of great meaning and eff ectiveness within the individual disease trajectory. It Box 3. Common general disorders in lung cancer patients Neurological: Limb palsy, hemiparesis, paraparesis, pain, delirium, epileptic seizures Metabolic: Diabetes mellitus, SIADH (syndrome of inappropriate antidiuretic hormone hypersecretion), anemia, thrombocytosis, thrombopenia, hypercalcemia Cardiovascular: Hypotension, thrombosis, superior (or inferior) vena cava congestion Gastrointestinal: Nausea, vomiting, bowel obstruction, liver failure 166 Th omas Jehser is often quite astonishing how they help the patient and their relatives face the illness with more understanding and to deal better with feelings of helplessness, which again might help to direct the path of disease to a cer- tain extent. According to the WHO, “Palliative care is an approach that improves the quality of life of patients and their families facing the problems associated with life-threatening illness, through the prevention and re- lief of suff ering by means of early identifi cation and im- peccable assessment and treatment of pain and other problems, physical, psychosocial and spiritual.” Th e founder of modern palliative care, Dame Cicely Saun- ders (1918–2005), developed her fundamental ideas when she was trying to ease and diminish cancer pain by looking at it from more than a “physical” perspective. So she inaugurated treatment strategies for the psycho- logical, social, and spiritual needs of the patients besides taking care of their physical condition, according to the concept of “total pain.” Palliative care, therefore, eases physical suff ering and provides information and under- standing within the social context of the patient. In the same way, it delivers consolation and assistance to help with anxiety and emotional pain caused by the threat- ened loss of one’s relations and life. Case report—part four Mr. K. fi nally agrees to have chemotherapy. After fi nding transportation, he visits the district hospital in Atbara routinely for the treatments and the necessary examina- tions and feels somehow safe and stabilized, although he has to take antibiotics for a short term of pyogenic bron- chitis. He meets other patients—many of them much younger than himself—who tell him about side eff ects, which he fi nds to be irrelevant to himself at this point. He gets a lot of relief when he fi nds a group supervised by a health care worker in his home town where they prac- tice breathing and relaxation techniques. With the help of his family and friends he also gets advice from a tradi- tional healer, who recommends an additional composite medication consisting of herbal and mineral substances. In personal meetings with his spiritual adviser Sheikh Farshi, he learns to talk to his wife and three children about the possible consequences of a fatal disease for the family and their fi nancial aff airs. After the next course of chemotherapy, he suff ers from vomiting and weakness for the fi rst time following such a treatment. Again he feels abdominal and back pain, as well as some dyspnea at rest. Shortly afterwards, a scleral icterus begins, and Mr. K. shows periods of dis- orientation and depression. His family takes him again to the Atbara district hospital for examination. It turns out there that he has developed a serious bone marrow insuffi ciency so that no further chemotherapy can be giv- en. He is now sent home to talk with his family doctor about further action that might be taken. What are the consequences of dyspnea, and how is it treated? Dyspnea is defi ned as a subjective experience of breath- ing discomfort, consisting of diff erent conditions that all lead to an increased breathing eff ort, either needing more strength or a higher respiratory rate. Th is experi- ence is also infl uenced by interactions among physical and emotional conditions. Dyspnea may be caused by, but is not at all identical to, respiratory insuffi ciency. While dyspnea is a subjective sensation of the patient, respiratory insuffi ciency is a “physiological” phenom- enon that can be exactly quantifi ed by testing. Th ere are multiple causes for respiratory insuffi ciency originating in the pulmonary, cardiac, vascular, bony, muscular, and nervous systems. Th e amount of resulting dyspnea de- pends heavily on the course of development of respira- tory insuffi ciency and its profoundness. Th erefore, some patients may be able to live with a greatly decreased re- spiratory capacity without feeling any dyspnea at rest, while others with minor respiratory insuffi ciency may suff er intense shortness of breath. Feeling dyspnea eas- ily causes anxiety, and vice versa. Th e diff erentiation of shortness of breath therefore requires the clinician to evaluate not only vital capacity and FEV 1 , but also the general condition of the patient, so as to avoid underes- timation of the problem. For therapy for dyspnea to be eff ective, knowl- edge of its physiology is helpful. In case of a possible treatment of underlying causes, such as bronchospasm or anemia, priority is given to this type of therapy. As one symptom of dyspnea deals with some sort of agita- tion, sedative treatment allows successful symptom con- trol, which might even help the breathing system to run more effi ciently. Besides sedative drugs such as benzodiazepines, morphine is probably the most important remedy avail- able for this important clinical situation. Morphine re- duces the subjective “air hunger” signifi cantly, regardless of the actual physiological need for O 2 and CO 2 transport Lung Cancer with Breathing Problems 167 and exchange. Other drugs such as haloperidol, cannabi- nol, and doxepin help to reduce the psychological distress and agitation. Besides pharmacotherapy, the treatment of cutaneous trigger zones by massage, cognitive and be- havioral distraction, and even simply directing fresh air toward the face stimulating trigeminal receptors, with a direct infl uence on breathing frequency, are means that lead to reproducible relief of suff ering. Th e availability of morphine, oxygen, and a fan may therefore be the most important means and, most of the time, are suffi cient to control even advanced stages of dyspnea. Besides dyspnea, what else should be considered in the treatment of lung cancer? Most often lung cancer is a progressive disease accom- panied by complications caused by tumor metasta- ses and general physical exhaustion. Th ese complica- tions often go along with pain and dyspnea and lead to enormous psychological suff ering, which needs to be addressed by appropriate treatment and honest infor- mation about the therapeutic options. In this way it is possible to infl uence the patient’s perspective regarding his or her personal quality of life. • Th e wide range of treatments targeting the diff er- ent possible complications include: • Medication (e.g., analgetics, antibiotics, broncho- dilators, corticosteroids). • Substitution of albumin, erythrocytes, electro- lytes, fl uids, and caloric agents. • Radiotherapy (to treat lytic bone lesions, tumor obstruction of central airways, superior vena cava syndrome, or intracranial pressure). • Surgical, endoscopic, and intravascular inter- ventions. Complementary treatment off ers exercise (physiotherapy), psychological or spiritual support, as well as receptive and imaginative therapies (mas- sage, musical therapy, and active relaxation tech- niques). A great number of patients carrying progres- sive lung cancers die from the complications of their illness rather than from the lung cancer itself. During the fi nal period of life, supporting and comforting the patient by lowering anxiety, agitation, weakness, pain, and dyspnea is most important. When clinicians have provided comprehensive instructions and are available as a backup if needed, this support may be provided by family members at home. Case report—part fi ve Mr. K. has returned home and is mostly resting in a com- fortable chair in the living room. His wife and two of the three children live with him in the house. Neighbors and some other family members visit quite regularly so that the patient participates in what is going on around him to a certain extent. Mr. K. has started to smoke again (about three cigarettes on a good day), which he claims “does not make any diff erence” at this point and reminds him of the “good old days” when he was a young postman in his origi- nal home town. Smoking also gets him to walk a few steps, because his family insists that smoking is only allowed outside. Th e family doctor regularly visits the patient twice a week. He has instructed Mrs. K. and one of the sons to administer morphine via a subcutaneous route using ti- tration doses in case of pain or dyspnea, which has been occurring several times during the evenings and nights. One day Mr. K. stumbles on his way back to his chair and is afraid of falling again after this incident. Th e next day he does not leave his bed and seems to be more dis- oriented than ever. Th e visiting community nurse admin- isters a sedative drug to the more and more agitated Mr. K. and calls for the family doctor. When the doctor comes in the next day, the general condition of Mr. K. has wors- ened. He dreams heavily, is feverish, and shows seizures of his right arm and his face. Th e doctor decides to leave Mr. K. in Barbar, since he sees no further options for specifi c treatment, as he explains patiently to the anxious family. Again a sedative is given subcutaneously, and the patient’s agitation subsides, which helps the family to remain at his side constantly, though weeping a lot. At the end of this day, Mr. K. dies without regaining consciousness or show- ing signs of agitation or suff ering, especially dyspnea. Pearls of wisdom Understand that: • Lung cancer is a life-threatening disease. • Th e character of breathing problems helps you to decide on their treatment. • Lung cancer causes pain problems, which can be treated. • Palliative care can be given to patients with lung cancer. • Morphine and a fan may, in most cases, be suffi - cient to prevent the patient from suff ocating. • Th e necessary dose of morphine is not given as milligrams per kilogram of body weight, but 168 Th omas Jehser rather by titration in small repetitive doses until an eff ective dose is achieved. • Th e positive eff ects of morphine far outweigh the risk of respiratory depression by opioids, since ti- tration allows fi nding the balance between reduc- tion of dyspnea and the typical side eff ect of re- spiratory depression. • Morphine should be given subcutaneously to al- low fast onset of action in acute situations of dys- pnea, if the intravenous route is not available. • Patients with dyspnea in end-stage lung cancer not only need pharmacotherapy, but especially require a team of caring family members, health care workers, friends, and spiritual advisors. • Anything that helps the patient should be used, because in palliative care, reservations about complimentary, alternative, or traditional medi- cine are not justifi ed. References [1] Alberg AJ, Samet JM Epidemiology of lung cancer. Chest 2003;123:21. [2] American Th oracic Society. Dyspnea: mechanisms, assessment and management, a consensus statement. Am J Respir Crit Care Med 1999;159:321. [3] Bruera E, MacEachern T, Ripamonti C, Hanson J. Subcutaneous mor- phine for dyspnea in cancer patients. Ann Intern Med 1993;119:906. [4] Colice GL. Detecting lung cancer as a cause of hemoptysis in pa- tients with a normal chest radiograph: bronchoscopy vs. CT. Chest 1997;111:877. [5] Harrington SE, Smith TJ. Th e role of chemotherapy at the end of life: “when is enough, enough?” JAMA 2008;299:2667. [6] Holty JEC, Gould MK. When in doubt should we cut it out? Th e role of surgery in non-small cell lung cancer. Th orax 2006;61:554. [7] Silvestri GA, Spiro SG. Carcinoma of the bronchus 60 years later. Th o- rax 2006;61:1023. [8] Toloza EM, Harpole L, McCrory DC. Noninvasive stating of non-small cell lung cancer: a review of current evidence. Chest 2003;123:137. 169 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. Download 4.8 Kb. Do'stlaringiz bilan baham: |
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