Congresses as Topic ; Humans ; Hypersensitivity, Immediate ; immunology ; Rhinitis ; immunology

With the exploitation of marine resources and environmental deterioration, perilous events in the sea are gradually increasing. Seawater drowning is one of the most important causes of death. Researches on seawater drowning have attracted more and more interests in recent years, and certain progresses have been achieved in scientific research and clinical treatment. In the aspects of theory and establishment of a model, a renewed concept of seawater drowning-induced acute lung injury (SWD-ALI) has been acquired, the animal model of SWD-ALI has been successfully reprodaced for elucidation of the pathological and pathophysiological changes in lung tissue. Multiple results of molecular biological research on SWD-ALI have contributed to illuminating the pathogenesis involved. It is indicated that, compared with freshwater-induced lung injuries, SWD-ALI is severer in clinical picture, and it might develop to a peculiar seawater drowning-induced acute respiratory distress syndrome (SWD-ARDS) if no prompt and effective treatment is employed. For the clinical treatment for SWD-ALI, comprehensive therapies based on mechanical ventilation have been approved. The scientific outcomes mentioned above have laid a foundation for the full realization of SWD-ALI and more effective rescue of SWD-ALI patients.

The standard operating procedures (SOP) of tumor tissue bank (TTB) involves the collection, processing, storage, quality control of biological samples. It is also the key to the normal operation of TTB and strengthen the cooperation between them. Many countries have recognized the need for the establishment of TTB, but the prevailing issue is that TTB is lack of access to a set of SOP for high-quality tissue samples. To further standardize the construction of TTB will also be involved in information management and common data elements (CDE) development of TTB.

The expression of tissue factor (TF) on the surface can be called TF positive MP, which participate not only in thrombosis, but also in the invasion and metastasis of tumors. Therefore, this article will review the role of TF positive MP in patients with malignant tumors.

Objective To analyze the influence of atrial fibrillation(AF) on N‐terminal pro‐brain natriuretic peptide(NT‐proB‐NP) for the assist diagnosis of acute heart failure(AHF) .Methods Totally 457 inpatients with suspected AHF due to acute dysp‐nea and conducting blood NT‐proBNP detection and electrocardiogram(ECG) within 24 h of admission were collected and devided into groups according to whether AHF was diagnosed and complicated with AF identified by ECG on admission ,that was AHF +AF group ,AHF + non AF group ,non AHF + AF group ,non AHF + non AF group .The receiver operating characteristic (ROC) curve was adopted to evaluate the value of NT‐proBNP for diagnosing AHF .Results Among 457 cases ,194 cases (42 .5% ) were diagnosed as AHF and 140 cases (42 .5% ) as AF .The NT‐proBNP level in the AF group was significantly higher than that in the non AF group (4 482 .0 pg/mL vs .1 302 .0 pg/mL ,P < 0 .01) .The NT‐proBNP level had no statistical difference between the AHF + AF group and the AHF + non AF group AF(6 580 .0 pg/mL vs .6 769 .0 pg/mL ,P> 0 .05) .The NT‐proBNP level in the non AHF + AF group was significantly increased compared with the non AHF + non AF group (403 .3 pg/mL vs .2 892 .0 pg/mL ,P< 0 .01) .The area under the curve(AUC) of NT‐proBNP for diagnosing AHF in the AF group and the non AF group was 0 .759(95% CI :0 .677 - 0 .841 ,P < 0 .01) and 0 .931(95% CI :0 .903 - 0 .985 ,P < 0 .01) .Conclusion The NT‐proBNP level in AF patients without AHF is significantly increased ,which might affect the value of NT‐proBNP in the diagnosis of AHF .In the clinical applica‐tion ,whether the patient has AF cardiac rhythm should be paid attention to for better interpretating the detection result of NT‐proBNP .

Objective:To used the internationally accepted methods of CT quality assurance for testing their quality, to maintain the normal operation of CT scanner and guarantee the quality of photographic image.Methods: Toshiba Activion 16 row CT, set the scanning conditions: tube voltage 120 kv, 310 mas exposure, scan time is 0.33 s, scanning layer thickness: 10 mm, 5 mm, 1.5 mm, view(FOV) 150 mm×150 mm, 512 x 512 reconstruction matrix. We measured the following performance parameters for CT spatial resolution, low contrast resolution,uniformity and noise with Catphan500 phantom made by the phantom laboratory of U.S.A.Results: The spatial resolution, low contrast resolution, uniformity and noise of the CT are all in line with the requirements. Obtained by detecting the X-ray dose, pixel, the thickness of the above parameters are affected, but also the interaction between the above parameters simultaneously.Conclusion: By detecting the spatial resolution, low contrast resolution of medical image, we can effectively guarantee system performance, maintaining optimal image quality.

BACKGROUND:The establishment of model is very crucial in the orthodontic tooth movement experiment. The selection of force and control ing of anchorage may greatly affect experimental results.
OBJECTIVE:To establish an animal model for orthodontic tooth movement.
METHODS:Twenty Wistar rats were included in this study. The root of incisor teeth at upper jaw was dril ed and then threaded with a ligature wire (0.3 mm diameter), therefore the alveolar bone and two incisor teeth were ligated. The first molar at right upper jaw was also ligated using a ligature wire (0.2 mm diameter). The experimental teeth were randomly divided into four groups. A Sental oy closed-coil spring (10 g, 25 g, 50 g) was placed between the maxil ary incisors and the maxil ary first molar, respectively. Taking the incisor as the anchorage, the molars were given a mesial movement, and control group received no force. On day 14, the dental pulp, dentin and enamin resorption was analyzed with Image-Pro Plus software.
RESULTS AND CONCLUSION:A light force (10 g Ni-Ti coil spring) produced irregular enamel resorption and narrowed periodontal membrane space, whereas heavy force (25 g Ni-Ti coil spring) produced irregular dentin and enamel resorption, even heavier force (50 g Ni-Ti coil spring) produced apparent resorption at dental root, which affected the dentin. No statistical difference of the relative depth of dentin resorption was found between the 10 g group and the control group (P>0.05). The data between other groups showed statistical y significant differences (P<0.05). The mechanical union of the incisors and the mandibular bone efficiently prevents the continuous eruption of the upper incisors, which maintains the anchorage stability. Using Ni-Ti coil spring, a stable, scientific and reliable model of orthodontic tooth movement can be established through mesial movement of the first molars. The optimal force of 10 g is used to move the rat first molar mesial y.

Objective To study the mechanisms and effect of soybean isoflavone on esophageal carcinoma cell ECa109 during the normoxia and hypoxia. Methods The environment of hypoxia was established by GasPak method. The ECa109 cells were assigned into normal control group, soybean isoflavones group, hypoxia group, and soybean isoflavones plus hypoxia group. The effect of soybean isoflavones was determined by MTT, and FCM was used for detecting the apoptosis and cell cycle of ECa109. Electron microscope was used to observe the ultrastructural changes of ECa109 induced by soybean isoflavone. Immunohistochemistry was used to detect the changes of HIF-1? and Fas. Results Soybean isoflavone could inhibit significantly the growth of ECa109 cells in a concentration-dependent manner, and arrest the cells in G_2/M phase during normoxia and hypoxia. The inhibitory effect was elevated significantly during hypoxia, and the cell apoptosis and necrosis were observed by electron microscope. The Fas expression was elevated by soybean isoflavone during the normoxia and hypoxia, and the HIF-1? expression was down-regulated during hypoxia. Conclusion Soybean isoflavone can inhibit ECa109 cells growth by delaying the progress of cell cycle, up-regulating the Fas expression. Soybean isoflavone can inhibit the expression of HIF-1? that was increased during hypoxia, which may be the mechanism that the inhibitory effect was enhanced significantly during hypoxia.

Objective To observe the effect of partial liquid ventilation (PLV) and conventional mechanical ventilation(CMV) on gas exchange in lung injury due to pulmonary edema as a result of seawater drowning in rabbit. Methods Twenty-four healthy male new Zealand rabbits were randomly divided into three groups ( n =8). Pulmonary edema was produced in all rabbits by drowning in sea water. Rabbits of PE group received no treatment,that of CMV group were treated with conventional mechanical ventilation and PEEP,and that of PLV group with CMV,combined with PEEP and FDC. All rabbits were treated for 3 hours. Blood gases,TNF-?in plasma and pulmonary histopathology were determined during the experiment. Results In PLV group,PaO_2 was increased obviously,inflammatory exudate was reduced,and alveolar and interstitial edema was alleviated. The plasma level of TNF-?was significantly lower in PLA group compared with PE group,( P