Based on review and practice of literature search of clinical economic evaluation, We have discussed the source and search strategy of literatures of clinical economic evaluation. A sample on antibiotics in the treatment of community-acquired pneumonia was shown concurrently.
目的 探讨胰性脑病的可能的发病机制、发病情况及防治措施.方法 计算机检索中文科技期刊全文数据库(1989～2004),收集有关胰性脑病的临床研究,并进行统计分析.结果 共纳入43篇文献,435例患者.胰性脑病在重症急性胰腺炎中的发病率远高于轻症急性胰腺炎;发病年龄趋向中、老年;病死率为43.67%;病因仍以胆系疾病为主;伴发低氧的几率不高于未并发胰性脑病患者.结论 胰性脑病的发生可能是多因素共同作用的结果,仍需进一步探讨其发病机制.血清髓鞘碱性蛋白有望成为有价值的诊断指标.防治以治疗原发病急性胰腺炎为主,重在预防.胰酶抑制剂和早期营养支持有一定预防作用.
Abstract： Objective To compare clinical outcomes and postoperative quality of life （QOL） of difference surgical strategies for patients with esophagogastric junction （EGJ） cancer， and investigate the best surgical strategy. Methods A total of 148 patients with EGJ cancer underwent surgical treatment in Xuzhou First People’s Hospital from July 2007 to October 2011. There were 111 male patients and 37 female patients with an average age of 64 （47-77）years. All the patients were divided into 3 groups according to different surgical strategies for them based on their respective preoperative assessment and tumor invasion degree. In group A， 81 patients underwent proximal subtotal gastrectomy and subaortic gastroesophageal anastomosis. In group B， 20 patients underwent total gastrectomy and esophagojejunostomy. In group C， 47 patients underwent proximal subtotal gastrectomy and jejunal interposition. Postoperative mortality and morbidity were compared among the three groups. Cancer metastasis rate and 1-year survival rate were also compared among the three groups. QOL questionnaire （EORTC QLQ C-30 and tumor specific module QLQ-OES24） was used to evaluate patients’ QOL during follow-up. Results There was no statistical difference in postoperative morbidity （P=0.762）and mortality （P=0.650）among the three groups. There was no statistical difference in cancer metastasis rate at 1 year after surgery among the three groups （P=0.983）. One-year survival rate was 100% in all the three groups. At 1 year after surgery， physical functioning score （P=0.037，0.000） and global health score （P=0.035，0.006） of group A and group C were significantly higher than those of group B， and there was no statistical difference in physical functioning score and global health score between group A and group C （P＞0.05）. Emotional function score of group B was significantly lower than that of group C （P=0.015）. Fatigue score （P=0.040，0.006）， anorexia（P=0.045，0.025）， nausea and vomiting symptom score （P=0.033，0.048） of group A and group C were significantly lower than those of group B. Pain score of group A was significantly lower than that of group C （P=0.009）. Insomnia score of group A was significantly higher than that of group C （P=0.028）. Reflux score of group A was significantly higher than that of group B and group C （P=0.025，P=0.021）. Conclusion Postoperative QOL in patients with EGJ cancer who undergo total gastrectomy is comparatively unsatisfactory. Proximal subtotal gastrectomy and jejunal interposition can significantly improve postoperative QOL. Postoperative QOL evaluation is helpful to choose better surgical strategies for patients with EGJ cancer.
Objective To investigate different gases and hematocrits on cerebral injury during deep hypothermic circulatory arrest (DHCA) in a piglet model including monitoring by near-infrared spectroscopy (NIRS). Methods Twenty-four piglets were assigned to 4 groups with respect to different blood gas and hematocrit during DHCA. Group A: hematocrit was maintained between 0.25 to 0.30, pH-stat strategy during cooling phases and alpha stat strategy in other phases; group B: hematocrit was maintained between 0.25 to 0.30 and alpha stat strategy; group C: hematocrit was maintained between 0.20 to 0.25, pH-stat strategy during cooling phases and alpha stat strategy in other phases; group D: hematocrit was maintained between 0.20 to 0.25 and alpha stat strategy. Cerebral oxygenations of piglets were monitored continuously by NIRS. The brain was fixed in situ at 6 hours after operation and a histological score for neurological injury was assessed. Results Oxygenated hemoglobin (HbO2) and total hemoglobin (HbT) signals detected by NIRS were significantly lower in group D than those in group A and group B during cooling (Plt;0.05). Oxygenated hemoglobin nadir time was significantly shorter in group A(Plt;0.05). All piglets with oxygenated hemoglobin signal nadir time less than 25 minutes were free from histological evidence of brain injury. Conclusion Combination of pH-stat strategy and higher hematocrit reduces neurological injury after DHCA.
Objective Degenerative lumbar scol iosis and spinal stenosis are more common in elderly patients. Because of many factors, treatment choices are more complex. To investigate the step treatment strategy of degenerative lumbarscol iosis and spinal stenosis. Methods Between January 2005 and December 2009, 117 patients with degenerative lumbar scol iosis and spinal stenosis were treated with step treatment methods, including conservative therapy (43 cases), posterior decompression alone (18 cases), posterior short segment fusion (1-2 segments, 41 cases), and posterior long segment fusion ( ≥ 3 segments, 15 cases). Step treatment options were made according to patient’s will, the medical compl ications, the degree of the symptoms of low back and lower extremity pain, the size of three-dimensional lumbar scol iosis kyphosis rotating deformity, lumbar spine stabil ity (lateral sl ip, degenerative spondylolysis), and the overall balance of the spine. The visual analogue scale (VAS) score of low back and lower extremity pain, Oswestry disabil ity index (ODI), lumbar lordosis angle, and scol iosis Cobb angle were measured and compared before and after treatments. Results Seventy-two cases were followed up more than 12 months, and there was no death or internal fixation failure in all patients. Of them, 19 patients underwent conservative treatment; the mean follow-up period was 19.3 months (range, 1-5 years); no symptom deterioration was observed; VAS score of low back and lower extremity and ODI were significantly decreased at last follow-up (P lt; 0.05); and lordosis angle was decreased and scol iosis Cobb angle was increased, but there was no significant difference (P gt; 0.05). Twelve cases underwentposterior decompression alone; the average follow-up was 36 months (range, 1-5 years); VAS score of lower extremity and ODI were significantly decreased at last follow-up (P lt; 0.05); and scol iosis Cobb angle was increased and lordosis angle was decreased, but there was no significant difference (P gt; 0.05). Thirty-one patients underwent posterior short segment fusion; the mean follow-up period was 21.3 months (range, 1-3 years); postoperative hematoma, poor wound heal ing, cerebrospinal fluid leakage, and superficial infection occurred in 1 case, respectively, and were cured after symptomatic treatment; VAS score of low back and lower extremity and ODI were significantly decreased (P lt; 0.05); and postoperative lumbar scol iosis Cobb angle and lordosis angle were significantly improved at last follow-up (P lt; 0.05). Ten patients underwent posterior long segment fusion; the mean follow-up period was 17.1 months (range, 1-3 years); postoperative symptoms worsened in 1 case and was cured after physical therapy and drug treatment for 3 months, and deep infection occurred in 1 case and was cured after debridement and continuous irrigation drainage; VAS score and ODI were significantly decreased (P lt; 0.05); and postoperative scol iosis Cobb angle and lordosis angle were improved significantly at last follow-up (P lt; 0.05). Conclusion The treatment of degenerative lumbar scol iosis and spinal stenosis should be individual and step. Surgery treatment should be rely on decompression while deformity correction subsidiary. Accurate judgment of the responsible segment of symptoms, scol iosis and lordosis can prevent the operation expansion and increase safety of surgery with active control bleeding.
In order to understand the latest progress of health decision support system (HDSS) construction, grasp the law of HDSS development and adopt the international advanced experience, this paper took Australia for example, presented a comparative analysis on the construction practices, including the contents, features and system functions of national construction guidelines for HDSS in different periods, and showed the integral development level of Australia HDSS was still in the exploratory stage, and its construction goal, function orientation and construction mechanism got improved gradually with the deep development of public health information. Additionally, to assure the accuracy and safety of HDSS function, Australia has been laying stress on the standard specification construction and system function authentication.
Objective To understand the basis and status of setting up the dispensing fee at home and abroad, and to ascertain the scope of dispensing service, so as to offer references to the setting up and implement of dispensing fee in China. Methods According to the evidence-based principle, the descriptive method was adopted to demonstrate the basis of setting up the dispensing fee. The different definition, payment mode and standard were compared at home and abroad. Results Separation of prescribing and dispensing was the basis of setting up the dispensing fee. In western countries, the charge of dispensing fee was almost at the same level, though its definition and scope were different among countries. It was more reasonable to determine the level of dispensing fee according to the visiting frequency, compared with the price, the number and the type of drugs in the prescription. Conclusion China’s calculation of dispensing fee should be based on the prescription fee, the cost of drug administration and store. Dispensing fee should be implemented in the pilot hospitals firstly. Institutions providing primary health care services (rural health clinics, community health service centers etc) which follow a policy of “separating revenue from expenditures” may not adopt the dispensing fee temporarily. In urban hospitals, it is advisable to promote the separation of prescribing and dispensing gradually and bring pharmacists to provide prescription auditing, dispensing and advisory services. For retail pharmacies, pharmacists should be gradually fully staffed as one of the necessary conditions for operating. Performance evaluation of pharmacist’s services and pharmacy administration also should be developed.
In this paper, we introduce search strategies and methods of contraceptive evidence through two aspects of evidence-based medicine, namely, the application of evidence and the creation of evidence. We should make choices according to our objectives when we search clinical evidence. If we aim to apply evidence, we should sequentially choose different databases according to the quality of evidence and use accurate search terms to search relevant papers quickly; if we aim to create evidence, we should choose multiple related databases and use different search terms to retrieve relevant studies comprehensively. The sensitivity and specificity of the selected search terms can be identified according to our purposes and the number of the retrieved papers.
Objective To search through the Cochrane database of systematic reviews using the flag new search option to find out whether this strategy helps update revivews. Methods We chose the New search option in the advanced search in The Cochrane Library on Wiley InterScience (Issue 1, 2009), and input all hit citations to the ProCite software. We then looked through the `What’s new`,`History`, as well as `Appendices` on hit reviews in the Cochrane library one by one, and then added these related contents to thef ield of the ProCite in order to analyze the results. Results A total of 140 systematic reviews had the flag new search. Among them, the total new search frequency were 274, meaning frequency was 1.96/1; updated within two years were 58 (41.43); there were 61 reviews with `Appendices` (43.57%). The status of the chosen database among the 61 reviews with `Appendices` was as follows: most were from MEDLINE (56 reviews, 91.80%), next EMBASE (47 reviews, 77.05 %), and finally CENTRAL (45 reviews, 73.7%). Among the reviews with `Appendices`, most of them were not correctly labeled. Conclusion Although some Cochrane systematic reviews are updated in a timely fashion, there is some incomplete information, although it may be still helpful for researchers to look for new studies.
Objective To study the methodology of Chinese literature retrieval. Methods The manual review of the literature was served as the “gold standard” against database search strategies (the diagnostic tests). We selected original articles about treatment, rehabilitation and randomized controlled trials from 31 journals. The articles were downloaded from the Chinese Biomedical Database (CBM). We selected potentially useful words through a word frequency analysis and determined the frequency of all the words in the titles, abstracts, and subject indexes. All the selected journals functioned as a closed database. The sensitivity, specificity and precision of all the high frequency words were calculated and the high frequency words of large sensitivity×precision were considered as final searching words. All the searching strategies were produced by computer programe which consisted of all searching words, title field and abstract field. Meanwhile, the sensitivity, specificity, precision and NNR (number needed to read) were calculated. Among the strategies, those comprised of all searching words would be used in CBM disc database, those of title and abstract words in Chinese Web Databases. The best strategies were those of high sensitivity and high specificity. Results 2 570 articles were selected and 45 articles met the gold standard. The strategies emphasized sensitivity were “therapeutic use OR random OR control(for CBM disc) and multicenter OR therapeutic outcome OR random (for Chinese online databases)”. The strategies emphasized specificity were “placebo OR prospective study(MH) OR double blind OR random controled trial (MH) (for CBM disc) and placebo OR prospective) OR double blind OR efficiency (for Chinese online databases).”Conclusions The method is optimal for Chinese literature databases