Direct and Indirect Costs of Chronic Obstructive Pulmonary Disease in Korea / 결핵및호흡기질환

BACKGROUND: Understanding the burden of disease is important to establish cost-effective treatment strategies and to allocate healthcare resources appropriately. However, little reliable information is available regarding the overall economic burden imposed by chronic obstructive pulmonary disease (COPD) in Korea. METHODS: This study is a multicenter observational research on the COPD burden in Korea. Total COPD costs were comprised of three categories: direct medical, direct non-medical, and indirect costs. For direct medical costs, institutional investigation was performed at 13 medical facilities mainly based on the claims data. For direct non-medical and indirect costs, site-based surveys were administered to the COPD patients during routine visits. Total costs were estimated using the COPD population defined in the recent report. RESULTS: The estimated total costs were approximately 1,245 million US dollar (1,408 billion Korean won). Direct medical costs comprised approximately 20% of the total estimated costs. Of these, formal medical costs held more than 80%. As direct non-medical costs, nursing costs made up the largest percentage (39%) of the total estimated costs. Costs for COPD-related loss of productivity formed four fifths of indirect costs, and accounted for up to 33% of the total costs. CONCLUSION: This study shows for the first time the direct and indirect costs of COPD in Korea. The total costs were enormous, and the costs of nursing and lost productivity comprised approximately 70% of total costs. The results provide insight for an effective allocation of healthcare resources and to inform establishment of strategies to reduce national burden of COPD.

Prevalence and clinical features of hypersensitivity reaction to contrast media after prescreening skin test

PURPOSE: Hypersensitivity reactions to contrast media (CM) are one of the most common causes of drug adverse reactions. The overall prevalence of immediate hypersensitivity reaction (IHR) was 0.16%–7.7% to nonionic CM. Although IHR to CM has been traditionally considered nonallergic, there is growing evidence that the mechanism of IHR to CM is mediated by IgE. It can be severe, even fatal, and a legal problem. To reduce IHR, the prescreening skin test is on the rise. METHODS: We reviewed cases of IHR to CM during enhanced computed tomography (CT) from 2008 to 2015 at a secondary hospital in South Korea. Patients who underwent enhanced CT were performed the 2-step prescreening skin test before nonionic CM-enhanced CT. If patients had adverse reactions to CM, the reactions were reported. IHR to CM was defined as an immediate reaction within 1 hour after CM administration. The Ring and Messmer system was used to classify the severity of reactions by grades I to IV, and we defined grades III and IV as severe reactions. RESULTS: A total of 30,105 CM-enhanced CT cases were recruited from 2008 to 2015. A total 46 patients with CM adverse reactions were reported. The IHR were noted in 30 of the total patients (0.1%), of which 6 had severe reaction. CONCLUSION: The prevalences of IHR and severe IHR to CM were 0.1% and 0.02%, respectively. Further studies are needed to evaluate the usefulness of prescreening skin tests to prevent IHR to CM.

Erratum: Reference Correction. Updates on desensitization for hypersensitivity reactions related to chemotherapy

There was reference error in references section (p.302, reference #45).

Updates on desensitization for hypersensitivity reactions related to chemotherapy

As the use of chemotherapeutic agents increased rapidly in recent years, more patients are under the potential risk of chemotherapy related adverse reactions. Multiple regular exposures to the same drug by chemotherapy protocol may increase the risk of sensitization to a chemotherapeutic agent, which can result in hypersensitivity reactions. Once severe hypersensitivity reactions occur, causative drugs should be avoided. However, a substitute with equal efficacy is not always available. When there is no effective alternative, desensitization is a safe tool for maintenance of chemotherapeutic agents causing hypersensitivity reaction. In this review, we introduce the latest knowledge about desensitization protocol for chemotherapeutic agents which are frequently used recently.

Korean Ginseng-Induced Occupational Asthma and Determination of IgE Binding Components

A number of case reports on occupational asthma caused by herbal medicines have been issued, for example, on Sanyak, Chunkung, Banha, and Brazilian ginseng. Recently, cases of occupational asthma induced by Sanyak and Korean ginseng have been reported, but the pathogenic mechanisms involved are unknown. This study was carried out to evaluate the immunologic mechanism underlying Korean ginseng-induced occupational asthma. A patient engaged in Korean ginseng wholesale was referred for recurrent dyspnea, wheezing, and nasal symptoms, which were aggravated at work. Allergen bronchial provocation testing to Korean ginseng extract showed a typical immediate response, and skin prick testing to Korean ginseng extract also showed a strong positive response. Moreover, serum-specific IgE levels to Korean ginseng extract were significantly higher than in controls. Enzymelinked immunosorbent assay (ELISA) inhibition tests showed a dose-dependent inhibition by Korean ginseng, but not by Dermatophagoides farinae, wheat flour, or Chinese balloon flower. Sodium dodecylsulfate-poly-acrylamide gel electrophoresis (SDS-PAGE) and immunoblotting revealed four specific Immunoglobulin E (IgE) binding components at 26, 30, 47, and 60 kDa, which were not bound by control sera. These results strongly suggest that occupation asthma induced by Korean ginseng is induced via an IgE-mediated mechanism.

Correlation between the Korean Version of Asthma Control Test and Health-Related Quality of Life in Adult Asthmatics

The Asthma Control Test (ACT) is a patient-completed questionnaire developed to assess asthma control. Health-related quality of life (HRQL) in asthmatics has shown relatively low correlations with parameters of asthma control and the relationship between the ACT and HRQL in asthmatics is yet unclear. Because revalidations of translated versions of questionnaires are critical for its utilization, we first sought to validate the Korean version of ACT and then to evaluate the relationship between the ACT and HRQL. Patients (n=117) completed the ACT and asthma-related quality of life questionnaire (AQLQ) at 3 physician visits. Pulmonary function was measured and an asthma specialist rated asthma control. The Korean version of ACT was found to be reliable, valid, and responsive to changes in asthma control over time up to three consecutive visits. ACT scores correlated significantly (p=0.001) with symptoms domain (r=0.72), activity domain (r=0.65), emotional domain (r=0.69), and environmental domain (r=0.67) of AQLQ. In conclusion, the Korean version of the ACT was found to be a reliable and valid tool for measuring asthma control, and to correlate well with AQLQ scores. Moreover, the ACT was responsive to changes in AQLQ scores over time.

A case of acetaminophen induced anaphylaxis without aspirin sensitivity / 대한내과학회지

Acetaminophen is a world-wide used analgesic and anti-pyretic drug with less anti-in-flammatory effect, available without prescription in most countries. Allergic-like reactions to this drug, including urticaria, angioedema, and anaphylactic reactions have only rarely been reported. This report describes a systemic reaction to acetaminophen documented by oral provocation test in a 30-year-old female patient with a history of anaphylaxis associated with acetaminophen use, in a subject who tolerated aspirin. After an oral challenge with 108.3 mg of acetaminophen, the subject had itching sensation of tongue. With a dose of 162.5 mg (cumulative dose 270.8 mg) acetaminophen, systemic urticaria and rash developed. Also, hand and facial angioedema and chest tightness were noted. Significant change of FEV1 was not noted. But, this patient has bronchial hyperresponsiveness. A rare acute hypersensitivity reaction to acetaminophen without aspirin sensitivity is described in this study. The results of study suggest an other mechanism rather than inhibition of cyclooxygenase as responsible.

Clinical Evaluation of Risk Factors in Elderly patients with Reflux Esophagitis / 대한소화관운동학회지

BACKGROUND/AIMS: The elderly patients with reflux esophagitis are less likely to feel or report their symptoms than the younger patients, even though they are more prone to complications such as bleeding, stricture or Barrett's esophagus. In this study we tried to investigate risk factors in the elderly patients who had endoscopically diagnosed reflux esophagitis. METHODS: Clinical data of six hundred and eighty seven patients with reflux esophagitis were reviewed. RESULTS: Among the 687 patients with reflux esophagitis, two hundred and thirteen (31%) were 60 or more than 60 years old. The frequency of accompanying hiatal hernia in the elderly group (age>or=60) was significantly higher than the younger group (age<60) (16.9%, 36/213 vs. 3.4%, 16/474, p<0.05). There was significant difference according age in the female group (0.9%, 1/114 vs. 22.7%, 22/97, p<0.05). The frequency of atropic gastritis was significantly higher in the elderly group than in the younger group , while other factors such as smoking, H. pylori and peptic ulcer disease were not different between the two groups. CONCLUSION: Among the risk factors of reflux esophagitis, the existence of hiatal hernia seems to be suggested more relevant to the development of this condition in the elderly group.

Clinical Evaluation of Risk Factors in Elderly patients with Reflux Esophagitis / 대한소화관운동학회지

BACKGROUND/AIMS: The elderly patients with reflux esophagitis are less likely to feel or report their symptoms than the younger patients, even though they are more prone to complications such as bleeding, stricture or Barrett's esophagus. In this study we tried to investigate risk factors in the elderly patients who had endoscopically diagnosed reflux esophagitis. METHODS: Clinical data of six hundred and eighty seven patients with reflux esophagitis were reviewed. RESULTS: Among the 687 patients with reflux esophagitis, two hundred and thirteen (31%) were 60 or more than 60 years old. The frequency of accompanying hiatal hernia in the elderly group (age>or=60) was significantly higher than the younger group (age<60) (16.9%, 36/213 vs. 3.4%, 16/474, p<0.05). There was significant difference according age in the female group (0.9%, 1/114 vs. 22.7%, 22/97, p<0.05). The frequency of atropic gastritis was significantly higher in the elderly group than in the younger group , while other factors such as smoking, H. pylori and peptic ulcer disease were not different between the two groups. CONCLUSION: Among the risk factors of reflux esophagitis, the existence of hiatal hernia seems to be suggested more relevant to the development of this condition in the elderly group.

Papillary Muscle Rupture after Acute Myocardial Infarction: The Importance of Transgastric View of TEE

Transesophageal echocardiography was performed to evaluate the exact cause of severe mitral regurgitation in a 64-year-old man presented with hypotension and dyspnea after acute inferior wall myocardial infarction. In mid-esophageal two-and four-chamber view, the ruptured stump of papillary muscle could not be visualized. However, in transgastric two-chamber view, we could clearly visualize the ruptured head of the posteromedial papillary muscle as a separated mass attached by chorda tendinae, as well as the freely mobile stump of the ruptured papillary muscle within the left ventricle. So, the comprehensive transesophageal echocardiography, including transgastric imaging, is always indicated in patients with severe mitral regurgitation after acute myocardial infarction.

Clinical Impact of Bronchial Reactivity and Its Relationship with Changes of Pulmonary Function After Asthmatic Attack Induced by Methacholine / 결핵

BACKGROUND: Bronchial reactivity is known to be a component of airway hyperresponsiveness, a cardinal feature of asthma, with bronchial sensitivity, and is increments in response to induced doses of bronchoconstric tors as manifested by the steepest slope of the dose-response curve. However, there is some controversy regarding methods of measuring bronchial reactivity and clinical impact of such measurements. The purpose of this study was to evaluate the clinical significance and assess the clinical use by analyzing the relationship of the bronchial sensitivity, the clinical severity and the changes in pulmonary function with bronchial reactivity. METHOD: A total of 116 subjects underwent a methacholine bronchial provocation test. They were divided into 3 groups : mild intermittent, mild persistent, moderate and cough asthma. Severe patients were excluded. Methacholine PC20 was determined from the log dose-response curve and PC40 was determined by one more dose inhalation after PC20. The steepest slope of log dose-response curve, connecting PC20 with PC40, was used to calculate the bronchial reactivity. Body plethysmography and a single breath for the DLCO were done in 43 subjects before and after methacholine test. RESULTS: The average bronchial reactivity was 38.0 in the mild intermittent group, 49.8 in the mild persistent group, 61.0 in the moderate group, and 41.1 in the cough asthma group. There was a weak negative correlation between PC20 and bronchial reactivity. A heightened bronchial reactivity tends to produce an increased clinical severity in patients with a similar bronchial sensitivity and basal spirometric pulmonary function. There were significant correlations between the bronchial reactivity and the initial pulmonary function before the methacholine test in the order of sGaw, Raw, FEV1/FVC, MMFR. There were no correlations between the bronchial sensitivity and the % change in the pulmonary function parameters after the methacholine test. However, there were significant correlations between the bronchial reactivity and the PEF, FEV1, DLCO. CONCLUSION: There was weak significant negative correlation between the bronchial reactivity and the bronchial sensitivity, and the bronchial reactivity closely reflected the severity of the asthma. Accordingly, measuring both the bronchial sensitivity and the bronchial reactivity can be of assistance in assessing of the ongoing disease severity and in monitoring the effect of therapy.