The revascularization of island flap were studied on rats by angiogram and Spalteholz method. The results indicated that capillary anastomosis was present on the 2nd postoperative day between flap and recipient bed and some recipient vessels entered the flap. Afterwards, the anastomosed vessels increased in number and enlarged in diameter gradually. A good opposition between flap and recipient bed was an important factor influencing anastomosis. Marked proliferation of the vessels was present both in the flap and recipient bed in revascularization.

Objective To know the accumulation and movement of heavy metals in the environment through sewage sluge using in agriculture. Methods The sewage sludge samples were collected from sewage treatment farms of Suzhou, Wuxi and Changzhou in the different seasons of 1998. The content and states of heavy metals were determined by AAS. The accumulation and movement of heavy metals were analyzed as sewage sludge was used in agriculture. Results The content of heavy metals in the sewage sludge was greatly higher than that in the soil background. Especially, the contents of zinc in the sewage sludge in three cities exceeded the related standard, the means were 1 199.00, 784.00 and 1 216.00 mg/kg respectively. A long term using of sewage sludge might induce heavy metal accumulation in the soil. Conclusion Sewage sludge used in agriculture may induce heavy metal accumulation in the soil and the organisms, so the risk of environmental heavy metals accumulation may increase.

In order to make early diagnosis of the ischemic heart disease in the aged NIDDM patients. 500 patients underwent a series of examinations including maximal plate exercise with 59M Tc-MIBI ECT myocardiography. maximal plate exercise ECG and 24-hour ambulatory ECG. The serum lipid. glucose and insulin levels, daily urine protein, glomerular filtration rate,body weight index and eyeground were also studied. The results showed that 56 patients had obvious myocardial ischemia (group A),49 patients had slight myocardial ischemia (group B)and 395 patients were free from myocardial ischemia (group C). With positive 59MTc-MIBI ECT myocardiography, 15 among 16 patients in group A and 6 among 12 patients in group B and none among 5 in group C showed coronary artery narrowing in coronary radiography. The average course of DM,serum total cholesterol,fasting serum glucose and insulin, glucosylated hemoglobin.daily urine protein and the incidence of proliferative retinopathy of group A were higher than those of group B or C(P

126 adult male Wistar rats were used.A 4?6 cm~2 standard island skin flap wasraised on one side of the abdominal wall of the rats.In the flaps of the experim-ental group,only the superficial epigastric and lateral thoracic vein were preserved.The process of revascularization,histological changes,glycogen content and lactatedehydrogenase (LDH) activity of the flap were observed postoperatively with Indian ink injection,X-ray,microscopy and microspectrometry.The shrinking rateand degree of edema of the experimental flap were also observed and all comparedwith those of the control flaps.The results indicated that the flaps of experimentalgroup had a higher survival rate and lower degree of edema,and its glycogencontent and LDH activity decreased markedly on the lst postoperative day,andincreased gradully afterwards.Revascularization started on the 2nd postoperative day,such as capillary anastomoses passing through the cut edges of the flap,vesselsentering the flap from the recipient bed,vessels becoming tortous,dilated,andmarkedly proliferated.The results suggest that there was a true plasmatic circulationat the early stage in the simple venous flap and turns to a normal vascular type byrevascularization.The vividness of a flap may be indicated by the variance of themetabolism of carbohydrate in the skin flap.

Objective To study the effect of individual and environmental factors of diabeties on their glycemic and lipidic metabolism. Methods While educating diabeties with diabetic informations, we inguired their individual data questionnaires. According to their diabetic periods,cultural levels,compliance to their doctors,daily work times and ocupations respectively,we grouped these patients and compared their fasting and postprandial glycemia (FBG & PBG), GHb,serum lipids and serum uric acid (BUA). Results Among 2 856 diabetic patients,the type I was about 4. 9% and the type Ⅱ about 95. 1% ; the family patients was about 9. 91% and the overweight about 44. 29K. According to patients' compliance to their doctors,blood glucose,GHb and lipids and BUA was lower in absolute compliance group than the basical group or the non compliance one (P＜0. 02),and the levels of glycemia and GHb and TG all related to their compliance (respectively r=- 0. 059, - 0. 055, - 0. 075, - 0. 063 ; and P＜0. 05, 0. 05, 0. 01, 0. 025 ). Considering the diabetes periods,the 1-5 year metabolic control of group was best (P＜0. 02) and the 5- 10 year and above 10 year metabolic control groups were better than the group within one year (P ＜0. 05). To patients' cultural levels, the metabolic control senior or higher middle school groups was better than the junior middle school or lower (P＜0. 05). Thinking their daily work time and occupation,the metabolic control of groups working more than seven hours was worst (p respectively less than 0. 05 and 0. 02). Conclusion diabetic patients' individual and environmental factors are all affecting their metabolic control,among them the complicance is most effective.

Objective To evaluate the influence of epidural block on blood coagulation and rhedogy in patients undergoing esophagectomy or lobectomy. Methods Twenty-two ASA Ⅰ-Ⅱ patients (14 male, 8 female) aged 40-65 yr undergoing esophagectomy or lobectomy were randomized to receive either combined general-epidural anesthesia (GEA group , n = 11) or general anesthesia (GA group, n = 11). The patients were premedicated with intramuscular pethidine 50 mg, promethazine 25 mg and scopolamine 0.3 mg. In GEA group epidural catheter was placed at T9-10 interspace before general anesthesia. A test dose of 4 ml 2% lidocaine was given. When correct positioning of the epidural catheter was confirmed, general anesthesia was induced with propofol 1.5-2.0 mg? kg-1 , fentanyl 2?g?kg-1 and rocuronium 0.6 mg? kg-1 , after placement of double- lumen endobronchial tube the patients were mechanically ventilated (VT 10 ml?kg-1 , RR 12 bpm, I: E = 1:2). Anesthesia was maintained with isoflurane inhalation and intermittent i. v. boluses of vecuronium. A mixture of 2 % lidocaine and 0.33% dicaine (1:1) was continuously infused at a rate of 4-6 ml?h-1 during operation. After operation PCEA was commenced with 0.12% ropivacaine and morphine 80 ?g?ml-1 (background infusion 4 ml?h-1 , bolus dose 2 ml, lockout interval 6 min) . In GA group the patients received the same general anesthesia technique. Postoperatively the patients were placed on PCIA with morphine 0.5 mg?ml-1 (background infusion 1 ml?h-1 , bolus dose 2 ml, lockout interval 6 min) Pain intensity was measured using VAS (0-10). Blood samples were taken before induction of anesthesia (T0, baseline), 1 and 3 h after skin incision (T1 , T2 ) and on the morning of 1st and 3rd postoperative day (T3 , T4 ) . Blood samples were tested immediately in a thromboelastograph (TEG) coagulation analyzer. Usual clotting tests (PT, APTT, platelet count, Hb, Hct), fibrinolysis tests (t-PA, PAI-A) and rheology tests were performed at the same time. Results PT and APTT were significantly prolonged during and after operation (T2,T3 ) as compared with the baseline values in both groups (P

目的观察绝经前后妇女骨密度的变化与甲状旁腺激素、降钙素和1,25(OH)2D3及相关生化指标间的关系。方法采用X线骨密度仪测量骨密度,用放免法检测患者血中甲状旁腺激素、降钙素水平,利用全自动生化仪检测血钙、血磷、血碱性磷酸酶(ALP)。结果绝经后妇女各部位骨密度均下降(P<0.05);血甲状旁腺素水平升高 (P<0.05);降钙素水平有下降趋势;血钙、血磷均无明显变化(P>0.05);血中ALP水平较绝经前升高(P<0.05)。结论妇女绝经后,骨代谢激素分泌发生紊乱,骨密度下降。

Cytotoxic substances and ionizing radiation can easily induce DNA damage, and double strand breaks (DSBs) are the main form of DNA damage. DNA damage can activate intracellular DNA damage responses and further induce related biological effects, such as DNA damage repair and cell cycle arrest. Homologous recombination (HR) is the primary DSB repair mechanism in eukaryotes. Abnormal expression of Rad51C, which is a key factor in the HR pathway, may result in DNA repair disorder, genomic instability, and eventually lead to tumor formation. In recent studies, researchers considered Rad51C as a potential target for cancer treatment. We reviewed the research progress on Rad51C in DNA damage repair and radiotherapy.

Objective To study the difference of Han male children and adolescent bone age of wrist-hand in Beijing and Guangzhou.Methods Bone age (BA) of left hand-wrist was assessed using X-ray by two radiologists based on CHN atlas method in 993 healthy children and adolescents (age range:1.0-19.0 years).The radiologists were blinded to the chronological age (CA) of those children.The interobserver variations were analyzed for evaluating the reliability of CHN Atlas method.The difference between CA and BA were separately assessed,and were analyzed by t test.Results Close correlation was found between BA and CA (r =0.969,0.957,P ＜ 0.01) in both two regions.The bone age was advanced at 1.0-3.9,and 7.0-15.9 years in Beijing boys,and at 1.0-2.9,6.0-7.9 years in Guangzhou bpys.There was significant difference at 1.0-1.9,9.0-14.9 years between Beijing and Guangzhou.Conclusions The bone age of Han male children adolescent in Beijing and Guangzhou area has the characteristic of acceleration.There is significance difference at some years between Beijing and Guangzhou,and the results can provide potential value for the further study of BA and clinical medicine.

The designed experiment of nutrition survey is set up in the medical teaching in order to make the medical students realize the seriousness and the creativity of the scientific research and to improve their interest and ability of the scientific research.