To study the effect of vascular proliferation and reconstruction in chronic hepatitis B (CHB), immunohistochemical staining and in situ hybridization were used. The expression of transforming growth factor (TGF-?1) and smooth muscle actin (?-SMA) in livers of CHB were observed. The results showed that TGF-?1 and ?-SMA were related with degeneration of hepatocytes, intrahepatic vascular fibrosis and hepatic sinusoidal capillarization. The expression degree and range of TGF-?1 and ?-SMA increased with the exacerbation of liver lesion. These results suggest that vascular proliferation and reconstruction may play important roles during the process of CHB.

Objective To explore the feasibitity of endoscopic thyroidectomy through armpit or breast approach. Methods 14 patients aged from 21 to 36 years.There were 11 cases of thyroid adenoma(9 cases of single side and 2 cases of double sides)and 3 cases of nodular goiter (1 case of single side and 2 cases of double sides).The mini-mcision was made at armpit or breast.A percutaneous chennel into thyroid gland was performed and the focus was removed with ultrasonic scalpel wnder endoscopy. Results All cases were operated on under endoscopy,in cluding 11 cases through armpit approach and 3 ones through breast approach.The mean operative time was 135(105～335)min.The average blood loss was 65ml through armpit approach and 135ml through breast approach respectively.There was no operative complications. Conclusions Thyroidectomy under endoscopy is a new secure method.

Objective To explore the feasibility of laparoscopic splenectomy and cholecysterctomy in the treatment of patients with congenital hemolytic anemia and cholecystolithiasis. Methods 8 patients with congenital hemolytic anemia and cholecystolithiasis were operated on by single-stage splenectomy and cholecysterctomy. Results The procedures were successfully accomplished in all patients. The average hospitalization was 7.5 days. No intraoperative and postoperative complications occurred in all of the 8 patients. Conclusions Single-stage laparoscopic splenectomy and cholecysterctomy is the therapy of choice for patients with congenital hemolytic anemia and cholecystolithiasis. The kind of operation is a minimally invasive approach and has the advantages of less injury and short hospital stay.

Objective To explore the feasibility of laparoscope combined with cholangioscope in the management of bile duct calculus. Methods 100 cases of extra- and/or intrahepatic bile duct underwent laparoscopic choledocholithotomy and T-tube drainage or intra- or postoperative cholangioscope was performed from July 1997 to December 2000. Results 42 out of 100 cases obtained intraoperative complete clearance of the bile duct calculus and other 58 cases achieved thorough clearance of calculus postoperatively once to six times. No residual calculus was found in 3 years of follow-up. Conclusions Laparoscopic and cholangioscopic surgery is an effective method for the treatment of bile duct calculus.

Objective To study the shape differences of upper epidermal cells in leaves of medicinal plants of Swertia L. and establish the new method for identifying them. Methods The epidermis were mounted in ordinary technique, and then scanned and binarized through HPIAS-1000 image analytic system. The waveness of the anticlinal walls (SFC) and the ratio of the Ferets diameter (SLF) of upper epidermal cells were detected. The leaf epidermal cells of 21 kinds of raw materials in 12 plants of Swertia L. from various regions were examined. Results The precision and reproducibility of software system were good, and the shape characters of the upper epidermal cells of the middle lamina in the third node arising from ground are the stablest inside the same species by the magnification 20?10 under microscope. The SFC and SLF of the upper epidermal cells of the same species of plants are relatively constant, conversely that of different species of plants are obviously different and distinguishable from each other. Conclusion The proposed method is a useful technique for identifying traditional Chinese medicinal materials originated from herbs and leaves of plants. HPIAS-1000 is simple, rapid, accurate, and practical for shape analysis of upper epidermal cells of plant leaf.

Objective To establish a method for content determination of swertiamarin in Lomatogoniopsis alpina. Methods HPLC method for determination was used. Chromatographic column: Alltimal C18 (250 mm?4.6 mm, 5 ?m). Mobile phase: methanol-water (including 0.05% H3PO4), and gradient elution. Flow rate:1 mL/min. Wavelength:234 nm. Column temperture:30 ℃. Results The calibration curve of swertiamarin was in good linearity over the range of 3.10～30.98 (r =0.999 1). The average recoveries were 98.0%, with RSD=2.66% (n =6). Conclusion It is a simple and sensitive method in controlling the quality of Lomatogoniopsis alpina.

Objective To explore the feasibility of laparoscopic subtotal colectomy on the basis of lesion identification with the combined use of laparoscopy and fibrocolonoscopy.Methods The operation was carried out under general anesthesia.The patients were maintained at a supine position.Four 10 mm trocars were introduced at the upper and lower borders of the umbilicus,and the left and right lower quadrants of the abdomen,respectively,and a 5 mm trocar was introduced at the right upper quadrant of the abdomen.The laparoscope was placed at the hypogastrium when performing right hemicolectomy,and at the left lower abdomen when left hemicolectomy.During the operation,a fibrocolonoscope was inserted by way of the severed end of the right colon for lesion identification.The colon was disconnected from the cecum to the sigmoid colon.Then the incision at the left lower abdomen was extended to 4 cm in length,and an extracorporeal ileosigmoidostomy was conducted. Results Pathologic changes of thickening and hardening intestinal walls were clearly observed under laparoscope.Fibrocolonoscopic examinations revealed that the false polyps and ulcers on the colonic mucosa had involved the descending colon and the part of the sigmoid colon.The operation time was 170 min and 190 min,respectively,and the intraoperative blood loss was 150 ml and 200 ml,respectively.Pathological examinations after the operation verified the presence of intestinal tuberculosis.No short-term complications occurred after the operation.The frequency of defecation was 5~6 times daily at short-term postoperative period and 1~2 times daily at 5~6 months after the operation.The patients' body weight increased by 2.5 kg and 4 kg,respectively. Conclusions Combined use of laparoscopy and fibrocolonoscopy can accurately evaluate the affected extent of the lesion.Laparoscopic subtotal colectomy is safe and feasible.

Objective:To perform textual researches on name, origin and distribution of Maidong to clarify the medicinal varieties and history recorded in ancient literatures and provide evidence for clinical use. Methods:Ancient herbal works were performed textual research, and the resource investigation and modern data were analyzed. Results:According to the ancient herbal records and modern researches, Maidong had lots of alias, while only Maimendong and Maidong were used as the medicine common names. According to the records of main origin, original plant morphological and medicinal characteristics of Maimendong, it was preliminarily concluded that Maidong recorded in the ancient herbal records was mainly produced in Jiande of Zhejiang province, Mianyang of Sichuan prov-ince, Xiangyang of Hubei province and the surrounding areas. The chemical compositions and pharmacological activities of Maidong and Shanmaidong were similar;therefore, they both could be used as the medicines. Conclusion:In the light of the ancient and mod-ern medicinal customs, modern chemistry and pharmacology researches and clinical practice of TCM, it deserves further discussion on whether Maidong and Shanmaidong can be used as multi source varieties of traditional Chinese medicines just like Polygonaceae plants palmatum L. , Rheum tanguticum Maxim, ex Balf. and Rheum officinale Baill. , and Ranunculaceae plants Coptis chinensis Franch. , Coptis deltoidea C. Y. Cheng et Hsiao and Coptisteeta Wall.

Objective To explore the epidemiology and risk factors of toenail onychomycosis among traffic police-men in Tianjin, and to prevent and control its prevalence. Methods Epidemiological surveys were performed to a total of 1 270 traffic policemen during physical examination in Public Security Hospital in Tianjin using cross-section study. Fungi in feet and the prevalence of toenail onychomycosis were examined simultaneously during questionnaires. Logistic regression of single factor and multiple factors were applied to analyze the risk factors. Results The prevalence of toenail onychomyco-sis in Tianjin traffic policemen is 32%. Age (OR=1.455), police boots (OR=1.047), history of tinea pedis (OR=7.521) and his-tory of diabetes (OR=1.820) are the main risk factors. Conclusion The prevalence of onychomycosis among Tianjin traffic policemen is high. Synthetic and effective interventions should be employed to deal with the risk factors.

Objective To study the relationship between vascular endothelial growth factor (VEGF) expression and proliferation of hepatic blood vessel and fibrosis in hepatitis B (HB) patients. Methods The total RNA of VEGF was extracted from human liver tissues, and VEGF mRNA probe was acquired by RT-PCR. It was then labeled on hepatic tissues of 160 patients with HB and 10 healthy individuals (control group). Immunohistochemistry of VEGF was performed at the same time. Results The results of hybridization in situ showed that VEGF mRNA was negative in the control group. While in the HB groups, VEGF mRNA was located in the hepatic sinusoids, Disse′s space and hepatocyte cytoplast around the dilated sinusoids. Immunohistochemistry showed that VEGF was expressed in three patterns: the cytoplasm, sinusoid membrane, and sinusoidal endothelium. The expression strength and distribution range of VEGF were closely related with the grading and staging of HB, hepatic vascular inflammation, destruction, obstruction, proliferation and fibrosis. There was remarkable difference between different liver pathological changes (P