Adolescent ; Female ; Heart Septal Defects, Atrial ; complications ; therapy ; Humans ; Male ; Pulmonary Veins ; abnormalities ; Young Adult

Angioplasty, Balloon, Coronary ; adverse effects ; Humans ; Male ; Middle Aged ; Platelet Aggregation Inhibitors ; therapeutic use ; Postoperative Hemorrhage ; drug therapy

Acute Disease ; Aneurysm, Dissecting ; complications ; Aortic Aneurysm, Thoracic ; complications ; Female ; Humans ; Myocardial Infarction ; etiology

Objective To establish a new and convenient assay for whole blood lead concentration. Methods Whole blood sample was digested by nitric acid-perchloric. Under the condition of pH 0.8～1.0, lead concentration was examined by Hydridegeneration Atomic Fluorescence Spectrometry.Results The method had good linearity when lead concentration were between 0 to 600 ?g/L, r =0.999. The within-run CV of the method for high, middle and low lead level were 4.1%, 3.6% and 3.5% respectively. The between-run CV were 4.9%, 4.6% and 4.7% respectively. The recovery rates were 105.4%, 98.5% and 94.8% respectively. The single-blind test result of series standard lead samples provided by Chinese Academy of Preventive Medicine were within the acceptable range. The detecting Limit of this method was 0.3 ng. There was no significant interference from main two-valence positiveion. The sample can be storage at lest for 1 months at 4℃. Samples of 869 children from Tianjin were tested by this method. The mean value was 91.9 ?g/L, median was 83.8 ?g/L, all data were within 23.1～386.3 ?g/L. The result showed out positive skewness distribution.Conclusion This method were sensitive, accurate, precise, quick and low-cost. It was suitable for use in clinical laboratories.

Objective To observe the morphology, cell viability and secretion function of catecholamine of the alginate-polylysine-alginate (APA) microencapsulated bovine chromaffin cells (BCCs) before and after cryopreserving with liquid nitrogen. Methods The APA microencapsulated BCCs were cryopreserved with dimethyl sulfoxide as cryopreservative agent by slow cooling and rapid rewarming for revivification. The change of cell function was observed by detecting the cell viability and secretion of catecholamine. Results As compared with the precryopreseving cells, the morphology and cell viability of the resuscitated APA microencapsulated BCCs showed no significant change. The catecholamine secretion volume of BCCs remained 80% of that by the precryopreserving cells. Conclusion It demonstrates that the resuscitated cryopreserved APA microencapsulated BCCs still remained good morphology, cell viability and secretion function of catecholamine.

Objective To study the choice of initial operative approach for thyroid nodule and the necessity of reoperation after local excision of differentiated thyroid cancer.Methods Clinical data of 138 patients with differentiated thyroid cancer after local tumor excision had reoperation at our hospital during a period of four year were retrospectively reviewed.All the reoperations were bilateral thyroidectomy and cervical lymph node excision.Results There were 76.8% patients with residual cancer in thyroid and cervical lymph node.There were 23 patients(16.7%) with recurrent laryngeal nerve injury that included 22 cases with unilateral and 1 case with bilateral injury after the initial operation,and 19 of the 23 patients with recurrent laryngeal nerve injury recovered after nerve repair.After thyroid reoperation,3 cases(2.2%) had recurrent laryngeal nerve injury,2 cases(1.4%) had partial parathyroid gland injury,2 cases(1.4%) had superior laryngeal nerve injury,but there were no cases of esophageal injury or postoperative bleeding.Conclusions The incidence of residual cancer is high after local excision for differentiated thyroid cancer,therefore,reoperation with bilateral thyroidectomy and cervical lymph node excision is necessary.

Adult ; Aged ; Agranulocytosis ; chemically induced ; Antineoplastic Agents, Alkylating ; administration & dosage ; adverse effects ; therapeutic use ; Brain Neoplasms ; secondary ; therapy ; Carcinoma, Non-Small-Cell Lung ; pathology ; Chemoradiotherapy ; Dacarbazine ; administration & dosage ; adverse effects ; analogs & derivatives ; therapeutic use ; Disease-Free Survival ; Dose-Response Relationship, Drug ; Female ; Humans ; Lung Neoplasms ; pathology ; Male ; Middle Aged ; Remission Induction ; Survival Rate ; Vomiting ; chemically induced

BACKGROUND: At present, studies show that a kind of stem cell community which in many kinds of organizations can differentiate into tissue cells of different embryonic layers; but those are different from embryonic stem cells, embryonic stem cell will lose the part differentiation potential gradually during the development of pregnancy, and will present some special phenotypes or the molecular markers, as CD105 and so on, will cell it postembryonic pluripotent stem cells.OBJECTIVE: To study the isolation of postembryonic pluripotent stem cells from fetal bone marrow, proliferative culture in vitro, induction and differentiation; transplantation to the liver of SCID mice with hepatic failure, and detect therapy effects.DESIGN, TIME AND SETTING: Cell observation and animal randomization experiment which was completed in the Ministry of Health of Cell Engineering Technology Research Center, Tianjin Third Central Hospital from March 2003 to March 2005.MATERIALS: The postembryonic pluripotent stem cells were extracted from thighbone and shinbone of 22-week old fetuses under sterile circumstance. Adult female SCID mice ware regarded as the recipients. CD105 immunornagnetic beads were provided by Miltenyi Biotec, Germany; mouse-anti-human albumin by Sigma, USA; basic fibroblast growth factor (bFGF) and hepatocyte growth factor (HGF) by PEPROTECH, UK.METHODS: Postembryonic pluripotant stem cells obtained from fetal bone marrow were isolated using density gradient centrifugation and micromagnetic beads technique. The hepatocyte-like cells were induced and differentiated with culture media containing HGF (30 ng/mL) and bFGF (20 ng/mL). Twenty-four SCID mice were randomly divided into experimental group and control group with 12 mice in each group. Hepatic injury models were established with intraperitoneal injection of D-galactosamine On the next day, about 106 CD105(+) cells were perfused into liver in situ in the experimental group, and about 106 CD105(-) cells or isovolumic culture medium were perfused in the control group.MAIN OUTCOME MEASURES: Two, seven days, one and three months after the transplantation of cells, human albumin expression in the liver tissue was detected by immunohistochemistry.RESULTS: The immunocytochemical assay of the cells after micromagnetic beads selection showed that the CD105 expression was slightly positive; the doubling time of the cells in the logarithmic growth period was around 30 hours; after being expanded for 10 population doublings, the cells entered decline period. The cells were transplanted into SCID mice's liver; 3 months later, the human serum albumin in the mouse liver was assessed by using monoclonal antibody of mouse-anti-human serum albumin, dotted or small focal expression of the protein could be detected. However, any expression was not observed in the control group.CONCLUSION: The bone marrow-derived pluripotent stem cells are able to transform to hepatocytas in the hepatic microenvironment.

Objective To investigate clinical characteristics of the multi-center breast DCIS (ductal carcinoma in situ), in order to improve the rate of early diagnosis. Methods Clinical data of 23 multi-center breast DCIS patients admitted and operated on from September 2003 to February 2009 at our department were retrospectively reviewed. Results There were 4 cases associated with nipple discharge,and 18 cases with preoperative negative physical examination (78%). In the preoperative examination within 6 months, the positive rate of mammography was 90% mainly characterized by the existence of diffuse and multiple small calcifications. The positive rate of MRI was 25%, B ultrasound had no positive findings. The patients that were confirmed multi-center breast DCIS by intraoperative frozen section examination received mastectomy and ipsilateral axillary L1, L2 lymph node dissection. Conclusion The diffuse and multiple small calcification is one of early clinical characteristics of multi-center breast DCIS. Although the disease has a wide range of lesion, it still is an early tumor, and has a favourite prognosis after comprehensive treatment.

Objective To evaluate total laparoscopic splenectomy combined with pericardial devascularization. Methods In this study,40 patients with portal hypertension and hypersplenism underwent total laparoscopic splenectomy combined with pericardial devascularization,in which 26 cases had a history of up-GI bleeding. Results Procedures were successful in 36 patients.There was four conversions to open surgery.The operations were completed in a mean time of (224 ± 54) min,with a mean estimated blood loss of (296 ± 209) ml and with no serious complication. Conclusion Total laparoscopic splenectomy combined with pericardial devascularization is a safe and effective available minimally invasive procedure in patients with portal hypertension and hypersplenism.