China ; Endoscopy ; trends ; Humans ; Nose ; surgery

There are some limits and irrationality in practical application of the clause 3.1, 3.2, 4.4.2, 4.5.2, 4.9.1 of YY 0672.1-2008 as the industry standard for laparoscopic trocar. This paper puts forward some opinion and advice.
Laparoscopy ; instrumentation ; Surgical Instruments ; standards

OBJECTIVE:To establish the RP-HPLC method for simultaneous determination of flavonoids(quercetin,cyanidenon,spinacetin,and 6-methoxyl-cyanidenon) in Inula britannica. METHODS:The samples were separated on chromatographic column Inertsil ODS-3(250 mm?4.6 mm,5 ?m) at a column temperature of 40 ℃.The mobile phase consisted of methanol-acetonitrile-0.49% citric acid(gradient elution) at a flow rate of 1.0 min?mL-1. The detection wavelength was set at 360 nm. RESULTS:The linear ranges of quercetin,cyanidenon,spinacetin,and 6-methoxyl-cyanidenon were 0.17～6.8 ?g(r=0.999 9),0.088～3.52 ?g(r=0.999 9),0.020 2～0.808 ?g(r=0.999 9) and 0.045～1.8 ?g(r=0.999 6),respectively,and the average recoveries of all stood at 96.03%～99.78% and RSD at 0.73%～1.36%(n=6 each). CONCLUSION:The method is simple,sensitive,accurate and reproducible,and it is applicable for the quality control of the raw medicinal substance and preparation of I.britannica.

The serum soluble interleukin-2 receptor (sIL-2R) in 66 patients with malignant tumorwas measured by sandwith ELISA technique in this paper,39 health students are as control.Theresults show the level of sIL-2R was obvious higher than the controls (P

In order to turn he triditional education model into the crisscross one and open up the range of knowledge and train students for profession,the Dean's Office of XJTU resolved to offer a course of Social Medicine for science and engineering students in 2001.The author sumed up the opinions from the students who learned the course and put forward some ideas for improving the teaching method, so as to the course can be played an important role in students'learning life.

Combined Modality Therapy ; Endoscopy ; Humans ; Intraoperative Period ; Rhinitis ; therapy ; Sinusitis ; therapy

Micrometastasis of carcinoma is one of the most significant pieces of evidence for molecular staging.Detection of micrometastasis of non-small-cell lung cancer plays a significant role in staging precisely,guiding treatment and predicting the prognosis of patients.This review is focused on the latest developments of markers such as CK19,LUNX,CEA mRNA,oncogene and anti-oncogene.The sites about micrometastasis of non-small-cell lung cancer are usually reported in lymph node and bone marrow,rarely in pleural cavity and increasingly in peripheral blood.

Leptin promotes proliferation of cancer cells via various signal transduction pathways and contributes to angiogenesis in gastric cancer. Leptin expression level is significantly higher in gastric cancer than in normal gastric mucous tissues, and correlates with clinicopathological features such as differentiation,tumor size and distant metastasis. Leptin has become a prognostic factor and a new therapy target of gastric cancer.

The results of electrocardiogram and coronary angiography were compared in 69 patients with acute inferior myocardial infarction(right ventricle, later wall). The sensitivity and specificity of ST segment elevation Ⅲ> Ⅱ in diagnosis of right coronary artery (RCA) as the infarction related artery (IRA) were 92.00% and 84. 21% respectively;those for ST segment depression avL > Ⅰ were 90. 00% and 89. 5% respectively. Therefore if ST-elevation Ⅲ > Ⅱ , ST-depression avL > Ⅰ and no depression on STV1 and V2 in acute inferior myocardial infarction may highly indicate that RAC be the IRA;on the contrary, the LCX be the IRA.

Objective To seek the least damage to tooth structure and method of treatment to obtain the minimal microleakage.Methods 600 posterior teeth in vitro constant,according to the random number table method,were divided into 6 groups:A,B,C,D,E,F,l00 cases in each group.The pigmentation of deep pit and fissure or pit and fissure caries of the suspicious isolated human premolar were selected as observation objects,respectively.a Er:YAG laser,a high-speed diamond bur and clean cup brush were used to prepare for isolated anterior molar occlusal pit and fissure.And the performance of each sample was filled with light curing composite resin and fluid,Six different filling conditions of filling body and fissure between microleakage and bonding interface were observed by dye penetration method and scanning electron microscopy.Results The efficiency of F group was 99％,which was significantly higher than 87％ of C group (χ2 =5.84,P ＜0.05),55％ of D group(χ2 =7.21,P ＜0.05) and 87％ of E group (χ2 =11.65,P ＜ 0.05).The efficiency of C group was 87％,which was significandy higher than 43％ of A group (χ2 =3.97,P ＜ 0.05) and 61％ of B group (χ2 =8.35,P ＜ 0.05).The efficiency of B group was 61％,which was significantly higher than 43％ of A group (χ2 =6.25,P ＜ 0.05).Conclusion Er:YAG laser with fluid resin filling is the most effective way for the clinical treatment of pit and fissure deep narrow,already susPicious pit and fissure caries pit and fissure sealant failed teeth.