The role of 18F-fluoro-deoxyglucose positron emission tomography (18F-FDG PET) in diagnosis of ovarian cancer

We evaluated the clinical significance of ¹⁸F-FDG PET to detect malignant ovarian neoplasms and tumor spread. 40 patients (median age: 57.5 years) underwent laparotomy because of clinical suspicion of malignant ovarian tumors or recurrent disease. The results of the preoperatively performed PET were correlated with the postoperative histologic diagnosis and the intraoperatively assessed tumor spread. In 10 of 40 patients benign tumors were found, among which a tubo-ovarian abscess was the only one diagnosed as false positive. 4/30 malignant neoplasms did not originate from the coelomic epithelium, but all were correctly recognized as malignant tumors by PET, as was recurrent ovarian cancer in 12 patients. Out of 14 primary ovarian carcinomas, 2 borderline tumors and 1 well-differentiated adenocarcinoma FIGO stage I were not correctly identified. Considering the tumor type, sensitivity, and specificity were 90%, calculating for the positive and negative predictive value 96% and 75%, respectively, and 90% for the diagnostic accuracy. Those statistical parameters were slightly lower for PET detection of lymph node metastasis and peritoneal carcinomatosis. Although its diagnostic accuracy may vary depending on the clinical application, ¹⁸F-FDG PET is basically a suitable method for detecting ovarian malignancies, particularly in patients with relapsed ovarian carcinoma.     

乳腺癌组织内雌激素受体新检测试剂的合成

1979年李善恒发明了雌激素受体检测试剂并在临床应用。为了寻找更有效、稳定、易得的受体检测试剂,我们曾以合成高分子化合物聚乙二醇代替原试剂中的牛血清白蛋白,以克服天然高分子化合物的不稳定性:另一方面,我们从雌激素的活性和改进合成路线着手,希望制备简便易得有效的试剂。     

医院集中式空调通风系统分区设计与控制院内感染的效应

医院中各种感染源与易感人群同时存在,极易发生医院感染,其中经空气导致的医院感染容易被忽视。分散于空气中的气溶胶与微生物以及运动的微粒是重要的感染传播媒介,而医院集中式空调的通风系统是医院环境中微粒最主要的来源,故此类型通风系统已成为经空气传播医院感染(并非只是呼吸道传染病)的重要传播途径。基于此,认为医院不应设置统一集中的中央空调通风系统,并依据流行病控制原则提出医院空调通风系统“分区”设计,即将医院内的污染区、清洁区、普通区的空调通风系统分别设置,区内根据实际工作需要增设必要的空气过滤设备,以有效控制经空气传播的医院感染发生。