Magnetic endoscopic imaging (MEI)is a non-radiographic imaging technique that has been developed in recent years. MEI is capable of displaying real-time three dimensional images of the colonoscope shaft within the abdominal cavity. MEI system has been shown to be beneficial in increasing the cecal intubation rate,helping remove colonoscope insertion tube loops,reducing the duration of looping,assisting training of colonoscopy when compared with traditional colonoscopy. This article reviewed the progress in research on MEI.

Arsenic is known as a toxic metalloid, which mainly exists in inorganic forms such as arsenite and arsenate in the natural environment. A number of microorganisms have evolved different resistant mechanisms for arsenic detoxification to cope with the widespread distribution of the poisonous arsenic. Four distinct microbial arsenic-resistant mechanisms have been described including As(III) oxidation, cytoplasmic As(V) reduction, respiratory As(V) reduction, and As(III) methylation. These mechanisms confer arsenic resistance in microorganisms that play important roles in the transformation and geological cycle of arsenic. This review mainly focuses on the researches on these molecular mechanisms and potential application for environmental arsenic bioremediation using microorganisms.

Objective To evaluate endoscopic ultrasonography (EUS) in preoperative staging of gastric carcinoma,and to study the molecular biologic basis of its ultrasonic manifestation.Methods Sev-enty-four patients with gastric carcinoma were referred to EUS and staged preoperatively.The staging esults of EUS were compared with the histopathological staging and the expression of PTEN.Results The verall accuracy rate of EUS for determination of T staging was 82.4%(61/74),for T1,T2,T3 and T4 were 100.0%,72.7％,85.O％ and 78.9％,respectively.For N staging,EUS had the overall accuracy rate of 74.3%(55/74),with sensitivity and specificity of 80.8％ and 59.1％,respectively.The preoperative EUS for T and N staging of gastric carcinoma was of inverse correlation with the expression of PTEN.Conclusions EUS is an accurate staging modality in determining carcinoma invasive depth and lymph node involved,with a few exceptions of overstaging and understaging.However,EUS criteria to differentiate benign from malignant nodes still need to be further defined by future studies.The preoperative EUS for T and N staging could well display the molecular pathologic basis of gastric carcinoma.

Objective To investigate the effect of intraoperative amino acid infusion on perioperative glucose metabolism. Methods Thirty-six adult mongrel dogs of both sexes weighing 12-16 kg undergoing partially small intestine resection under general anesthesia were randomly allocated to one of 4 groups (n=9 each): Ⅰ control group received normal saline (C);Ⅱ,Ⅲ,Ⅳ amino acid group (A1, A2, A3) received iv infusion of 2.85%, 5.70% and 11.4% 18-amino acid respectively at 12 ml·kg-1·h-1 during operation starting from skin incision until the end of operation. The animals were premedicated with ketamine and diazepam. Anesthesia was induced with propofol 5-10 mg/kg, fentanyl 2 μg/kg and vecuronium 0.2 mg/kg and maintained with 1%-3% isoflurane and intermittent iv boluses of fentanyl and vecuronium. The animals were intubated and mechanically ventilated. PET CO2 was maintained at 30-40 mm Hg. ECG, MAP, HR, PET CO2 and esophageal T0 were continuously monitored. Venous blood samples were collected before anesthesia (T1), 15 min after induction of anesthesia (T2), 15, 30 min and 1 h after skin incision (T3-5), when abdomen was closed (T6) and 1,2,4,8 and 24 h after operation (T7-11) for determination of plasma glucose, lactate, insulin and glucagon. Liver biopsy was performed at T6-11 and muscle biopsy at T2,6,11 for measurement of hepatic and muscle glucagon. Homa index was used to estimate the degree of insulin resistance. Results The plasma glucose and insulin concentrations were significantly increased at T3-11 as compared with the baseline at T1 in all 4 groups (P<0.05). The plasma insulin concentrations were significantly higher in group A1 (at T6), group A2 (at T3,6) and group A3 (at T3-11) than in group C (P<0.05). Homa index was significantly higher in group A3(at T3-8) than in group C. Conclusion Intraoperative amino acid infusion increases plasma insulin concentration but does not prevent glycogenolysis especially high dose amino acid infusion.

Objective To evaluate the clinical effect of non-penetrating trabecular surgery (NPIS) without subscleral implantation in primary open-angle glaucoma (POAG) Methods Twenty eyes of 16 patients with POAG were underwent NPTS The procedure involved excising a deep-scler- sclera tissue that flush with innerwall of Schlemm's canal without opening the anterior chamber. The postoperative intraocular pressure (IOP), inflammation and filtering bleb were analysised. All of patients were undertaken ultrasound biomicroscopy (UBM ) to evaluate the surgery site on postoperative 2 weeks and 3 months. Mean follow-up was (4. Z? 2. 4) months. Results The IOP decreased from preoperative average value of (3.78? 1. 11 ) kPa, to postoperative average value of (2. 08? 0. 51 ) kPa (P

Objective Establishing a kind of analysis method about HPLC character spectra of native medicinal materials, Lonicera fulvotomentosa, in Guizhou province for supplying experiment basis to guide processing and quality control of Lonicera fulvotomentosa. Methods Making the Lonicera fulvotomentosa sample liquors with 50% carbinol solvent and vibrating 30 minutes by ultrasonic. Adopting high performance liquid chromatography RP-HPLC method, Luna C18 (2) (5 ?m, 250 mm ? 4.6 mm) chromatographic column, the volume flow 1.0 mL/min, the column temperature 30 ℃, the detection wavelength 238 nm, the mobile phase 0.2% phosphoric acid acetonitrile (A)-0.2% phosphoric acid solution (B), the gradient elution 0～15 min, A∶B=10%∶90%, 15～60 min, A∶B=10%∶90%→40%∶60%. Results Determined 9 common peak in character spectra of the Lonicera fulvotomentosa by detecting 10 group Lonicera fulvotomentosa medicine materials with referring to chlorogenic acid, the precision and stability and reiteration test RSD value all less than 3.0%. The similitude degree between the samples and the character spectras was more than 0.99 by evaluating ten batch of the samples with the similarity assessing soft, proving that the quality of the ten batch of the Lonicera fulvotomentosa medicine materials was stable and homogeneous. Conclusion The character spectra of the Lonicera fulvotomentosa was established to supply experiment basis for effectively controlling process, quality and standard of Lonicera fulvotomentosa.

A series of monoclonal antibodies have been used to study the distribution of T and B lymphocytes and their subsets in human spleen (5 from normal human and 2 from patients with portal hypertension). The results indicate that the T cells are mostly located in the periarterial lymphatic sheath, and in which a few B lymphocytes can be seen. The B cells are concentrated in lymphoid follicles, but also contain some T lymphocytes such as Leu 1, Leu 3a and Leu 4 positive T cells, these cells are necessary for forming of germinal center. Whereas the marginal zone, is composed of a mixture of T and B cells as well as the T_(ac) positive cells. The red pulp is composed of a mixture of T and B ceils, but the T and B cells are distributed randomly. In this report, the LN-2 monoclonal antibody is used first to study the B lymphocytes in human spleen. So far it is a unique antibody to react with nuclear membrane of B lymphocytes, the activity of LN-2 antigen do not influenced by B-5 fixation and paraffin embedding. From our data, there is no difference in staining feature and charateristic distribution between the normal human spleen and spleen of portal hypertensive patients. Although the periarterial lymphatic sheath in cases with portal hypertension seems to be narrower than the normal.

Video-assisted thoracic surgery (VATS) is high-skilled operation,which is tacit,scene-related,hard to transfer and individualized.The action formation of VATS is implemented by action orientation,imitation,integration,training and automation.The skill acquisition of VATS involves four overlapping steps:studying examples to do analogy,developing abstract rules,slowly moving to the use of production rules and retrieving specific examples.Research on teaching methods of VATS in the view of tacit knowledge helps to learn this skill better and more quickly.

Objective To study the inhibition effects of 10-hydroxycamptothecinc and low molecular weight heparins on human hepatocellular carcinoma(HCC)in nude mice.Methods Metastatic model of HCC was established in nude mice.The model mice were randomly divided into 4 groups:the control group,10- hydroxycamptothecinc group,low molecular weight heparins group,and combined treatment group(10-hy- droxycamptothecinc and low molecular weight heparins).Tumor sizes,tumor inhibition rates,tumor metas- tases,intratumoral microvessel density(MVD),CD_(31)and AFP were evaluated.Results In comparison with the control group and the 10-hydroxycamptothecinc group,the tumor sizes of the low molecular weight heparins and the combined treatment group were significantly smaller;the tumor inhibitor rates were 0 versus 76.6%, 79.8%,94.1%;MVD were 21.1?6.5 versus 17.2?3.1,7.1?2.3 and 4.8?1.8;CD_(31)were 31.7?6.1 versus 26.2?5.2,20.9?4.7 and 19.5?2.4;the incidence of liver metastasis was 80% versus 70%,20% and 10%;lung metastasis was 70% versus 60%,20% and 10%;the peritoneal metastasis was 90% versus 60%,30% and 30%.AFP were(121.9?31.4)ng/ml versus(56.2?37.9)ng/ml,(75.6?28.7)ng/ml and(20.7?12.9)ng/ml. Inhibiting effects of growth and metastasis of HCC in 10-hydroxycamptothecinc group,low molecular weight heparins group and combined treatment group were significantly different from those of the control group(F= 9.074,P

AIM: To explore the treatment methods of severe migraine. METHODS: 51 cases of severe migraine patients were treated with the combination of radix salviae militiorrhizae, diclofenac and sodium aescinate, and another 62 cases of severe migraine patients were treated with diclofenac alone. RESULTS: The efficacy of the combination is better than that of diclofenac alone (P