巴乐梦病床控制电路的故障排除与改进

本文就巴乐梦电动病床的控制电路的常见故障进行了分析，利用中小功率晶体管直接取代功率输出型IC反向器电路，通过对控制电路的改进，降低了维修成本，提高了病床的使用寿命。     

Magnetic resonance imaging of the knee: initial experience in a district general hospital.

We present the results of a prospective study comparing the accuracy of magnetic resonance imaging with arthroscopy in the assessment of knee complaints. Using a low field strength magnet, MRI was able to achieve a high diagnostic accuracy within the setting of a district general hospital.     

Role of collagenase in colonic anastomoses: a reappraisal

Increased collagenolysis, with reduction in collagen concentration, has been incriminated in the breakdown of colonic anastomoses but previous studies have measured only collagen levels and non-specific collagenolytic activity. Collagenase, the initiating enzyme in collagen degradation, is synthesized on demand and controlled by tissue inhibitor of metalloproteinases (TIMP). Antibodies to collagenase and TIMP were applied to colonic anastomoses in rabbits to investigate the role of the enzyme during healing. Within 12 h of operation, secreting cells and extracellular collagenase were identified at the everted edges of the bowel wall. After 24 h, collagenase activity was accompanied by TIMP secretion in the same localized regions, and by the third postoperative day very few cells were still synthesizing enzyme in these areas, although extracellular activity remained visible. TIMP-secreting cells, however, were seen in a layer of connective tissue sealing the serosal surface of the anastomosis. At 7 days, both enzyme and inhibitor were found only in small aggregates of secreting cells in the deeper layers. The localization and extent of collagenase and TIMP activity accorded well with a normal healing response as, at all times, the enzyme was confined to the immediate vicinity of the suture line.     

Is endometrial infection with Candida albicans a cause of recurrent vaginal thrush?

OBJECTIVE--It was hypothesised that the endometrium might act as a reservoir for candida, thus infecting the vagina as the endometrium is shed during menstruation. DESIGN--A prospective study of women with recurrent vulvo-vaginal candidiasis. The endometrium was sampled and cultured for candida species. SETTING--Central London STD clinic. SUBJECTS--26 women were enrolled, of whom 20 completed the study. RESULTS--One patient had a positive endometrial culture for candida species, the isolate being Candida krusei. CONCLUSIONS--The endometrium is not a common resevoir for candida species and therefore, infection at this site is an unlikely cause of recurrent vaginal candidiasis.     

Cardia: study design, recruitment, and some characteristics of the examined subjects

In 1984, a prospective cohort study, Coronary Artery Risk Development in Young Adults (CARDIA) was initiated to investigate life-style and other factors that influence, favorably and unfavorably, the evolution of coronary heart disease risk factors during young adulthood. After a year of planning and protocol development, 5,116 black and white women and men, age 18-30 years, were recruited and examined in four urban areas: Birmingham, Alabama; Chicago, Illinois; Minneapolis, Minnesota, and Oakland, California. The initial examination included carefully standardized measurements of major risk factors as well as assessments of psychosocial, dietary, and exercise-related characteristics that might influence them, or that might be independent risk factors. This report presents the recruitment and examination methods as well as the mean levels of blood pressure, total plasma cholesterol, height, weight and body mass index, and the prevalence of cigarette smoking by age, sex, race and educational level. Compared to recent national samples, smoking is less prevalent in CARDIA participants, and weight tends to be greater. Cholesterol levels are representative and somewhat lower blood pressures in CARDIA are probably, at least in part, due to differences in measurement methods. Especially noteworthy among several differences in risk factor levels by demographic subgroup, were a higher body mass index among black than white women and much higher prevalence of cigarette smoking among persons with no more than a high school education than among those with more education.     

用ELISA检测肺癌患者血清中Endostatin的变化

目的建立快速敏感的ELISA方法检测肺癌患者血清内皮抑素(Endostatin)。方法对41例肺癌患者及22例良性肺病患者进行血清Endostatin测定并与20例正常人进行比较。结果肺癌患者体内Endostatin水平高于良性肺病患者和正常人。结论快捷的ELISA检测法可以成为人们在临床及基础研究Endostatin的新方法。     

重症肌无力胸腺切除术后呼吸道管理与并发症的防治

目的 探讨重症肌无力胸腺切除术后呼吸道管理与并发症的防治.方法 32例ICU收治的重症肌无力胸腺切除术后的患者,根据危象预测积分,分为普通组(积分＜12分,n=21)和高危组 (积分＞12分,n=11),对两组患者术后呼吸机支持时间、拔管前后肌力恢复情况、自主呼吸情况、动脉血气分析情况以及两组患者术后体温、胸片和痰培养结果进行统计分析.结果 高危组患者术后呼吸支持时间(18 ～ 30 h,平均26 h)大于普通组患者(4 ～ 28 h,平均14 h),两组有显著性差异(P＜0.01),同时术后发热、胸片渗出影以及阳性痰培养结果的发生率也高于普通组.结论 术后给予高危患者严密的监测和充分的呼吸支持,有助于降低重症肌无力危象的发生率和死亡率,同时应充分重视气道护理和感染的防治.