A LMCWanimal model in cat was reproduced according to Carey′s method. Twelve cats were divided into two groups with 6 in each. In one group low velocity missile craniocerebral wound (LMCW) was produced (C group), and in another dextran 40 was given after the injury(Dex40 group). Pial microcirculation was observed in vivo under transluminal microscope, and pial microvessel caliber was also measured. Microregional cerebral blood flow (CBF) was measured with laser doppler flowmetry. Blood samples were collected at 5 time points for surveying and calculating blood rheological parameters. Brain tissues and brain microvascular corrosion casts were obtained for light and electronic microscope observation. There was vasoconstriction of the pial arterioles and venules immediately after the injury,lasting for about 30min. In C group, they dilated 1h later, and returned to normal at 2h,again vasoconstriction appeared in the arterioles from 5h to 8h, while there was vasodilatation of the venules. All blood rheological parameters rose significantly, and did not recover to normal after 8 hours. Petechial hemmorhage, swelling and damage of the nerve cells were found in the parietal lobe contralateral to the trauma. Microthrombosis and occlusion were observed in some microvessels. When the injured mice were treated with dextran 40 micro regional CBF and blood rheological changes were improved. We conclude that Dextran 40 ameliorates the cerebral microcirculation disturbance through improving the blood rheological changes following low velocity missile craniocerebral wounds, and Dextran 40 may be useful in clinical practice.

Objective To study the method for early treatment and Ⅰ-stage repair of the acute facial and brain injuries and its significance. Methods A retrospective study was performed in 38 cases with acute cranial injury,who underwent early treatment and surgical repair of the cranial bone and/or dura defects with self-tissues,glue material and titanium net depending on individual conditions. Of all,33 cases (87%) received Ⅰ-stage repair. Antibiotic therapy was performed in all the cases after operation. Results All patients recovered with satisfactory regional appearance. No intracranial infection or rhinorrhea of cerebral spinal fluid occurred among them during the follow-up for from six months to 11 years. Conclusion For the acute facial and brain injuries,early treatment and Ⅰ-stage repair based on the injury site and injury severity can attain safe and effective results.

Objective To investigate the effect, preponderance and clinical significance of the examination of gastrointestinal transmitting function with small amount of barium meal. Methods Thirty cases of healthy subjects and 50 patients with constipation swallow 40 g barium meal once, then abdominal fluoroscopy or plain films were taken until barium meal being egested totally. Results The transit time of stomach, small intestine, colon, rectum and the whole digestive tract were (189?64)minutes, (330?108)minutes, (2239?659)minutes, (136?49)minutes, (2801?735)minutes in healthy subjects and (212?87)minutes, (366?94)minutes, (3665?1322)minutes, (650?219)minutes, (5973?2341)minutes in constipation patients respectively. The transit time of colon and rectum in constipation patients was obviously longer than that of healthy subjects (P0.05). Conclusion The pictures of the examination with small amount barium meal are clear, precise, reliable, and provide exact data for constipation classification.

Objective:To investigate the role of miRNA-181 targeting phosphatase and tensin homologue deleted on chromosome ten (PTEN) in regulating phosphatidylinositol-3-kinase/Akt signaling pathway (PI3K/Akt) signaling pathway in renal injury of hyperuricemia rats.Methods:Forty male Wistar rats were randomly divided into control group, model group, negative control group and miRNA-181 inhibition group. Their serum uric acid, creatinine and urea nitrogen were tested. HE staining was used to observe the renal histopathological changes in each group. The expression of miRNA-181, PTEN, PI3K and Akt mRNA in renal tissue of rats in each group was detected by quantitative real time-polymerase chain reaction (qRT-PCR). Western blotting analysis of PTEN, PI3K, Akt and p-Akt protein expression in renal tissue of rats in each group. The targeting relationship between miRNA-181 and PTEN was confirmed by double luciferase reporter gene experiment. One-way analysis of variance (ANOVA) was used for the comparison between multiple groups, with the same variance. LSD- t test was used for further comparison between the two groups. If the variance was not the same, Tamhane's T2 test was used for further comparison between the two groups. Independent sample t-test was used to compare between the two groups. Results:Compared with the control group (135±21) mmol/L; (27.8±2.1) μmol/L; (6.8±0.5) μmol/L, the contents of uric acid [(213±28) mmol/L, (214±23) mmol/L, creatinine (49.2±2.3) μmol/L, (48.6±2.2) μmol/L and urea nitrogen (11.5±2.7) μmol/L; (11.7±2.5) μmol/L] in the model group and the negative control group were significantly increased ( Furic acid=26.739, Fcreatinine=259.055, Furea nitrogen=12.921, all P<0.05); compared with the nega-tive control group, the contents of uric acid (169±21) mmol/L, creatinine (33.7±1.8) μmol/L and urea nitrogen (9.1±1.7) μmol/L in the miRNA-181 inhibition group were decreased (LSD- turic acid=4.356, LSD- tcreatinine=15.773, LSD- turea nitrogen=2.858, all P<0.05). The expression level of miRNA-181 in renal tissue of the model group and the negative control group (1.88±0.16, 1.84±0.18) was significantly higher than that of the control group (0.53±0.08) ( F=193.554, P<0.05), while the expression level of PTEN protein (0.18±0.02, 0.16±0.02) and mRNA (0.48±0.08, 0.44±0.07) were lower than that of the control group (1.27±0.06, 1.27±0.16) ( Fprotein=515.116, FmRNA=141.470, all P<0.05) ); after inhibiting miRNA-181, the expression level of miRNA-181 (1.35±0.58) in renal tissue increased significantly (LSD- t=10.341, P<0.05), and the expression level of PTEN protein (0.84±0.05) and mRNA (0.90±0.08) increased on average (LSD- tprotein=20.471, Tamhane's T2 mRNA=13.881, all P<0.05). The results of double luciferase reporter gene analysis showed that PTEN was the target gene of miRNA-181. Compared with the control group (0.18±0.02, 0.09±0.01, 0.05±0.02, 1.06±0.07, 0.96±0.06), the expression level of PI3K (1.01±0.06, 1.00±0.06), Akt (0.90±0.05, 0.95±0.04), p-Akt protein (0.99±0.07, 0.97±0.05) and the expression level of PI3K (3.63±0.18, 3.68±0.22), Akt mRNA (2.38±0.05, 2.34±0.12) in the renal tissue of the model group and the negative control group were significantly increased ( FPI3K protein=169.979, FAkt protein=393.411, Fp-Akt protein=164.201, FPI3K mRNA=563.944, FAkt mRNA=141.470, all P<0.05); after inhibiting the expression of miRNA-181, the expression level of PI3K (0.69±0.06), Akt (0.42±0.03), p-Akt protein (0.50±0.05) and the expression level of PI3K (2.40±0.09), Akt mRNA (1.40±0.12) in the renal tissue of the rats were decreased (LSD- tPI3K protein=7.432, LSD- tAkt protein=18.291, LSD- tp-Akt protein=9.595, Tamhane's T2 PI3K mRNA=17.070, Tamhane's T2 Akt mRNA=17.357, all P<0.05). Conclusion:Inhibition of miRNA-181 expression can target PTEN to inhibit PI3K / Akt signaling pathway to protect renal injury in hyperuricemia rats.

Objective To estimate the absorbed dose and effective dose to the examined adult patients during digital tomosynthesis and to provide reference data for radiation dosimetry.Methods The phantom experiments were grouped according to the examined site(main beam scanned site),and the data displayed in real time during digital tomosynthesis are used as conditions for the phantom experiments.The effective doses to the examined patients were estimated on the basis of phantom scanning and tissue-absorbed dose calculation.Results During digital tomosynthesis,the effective doses to the examined patients of various groups were 0.524 mSv for head,0.736 mSv for cervical spine,2.719 mSv for thoracic vertebra,1.810 mSv for chest,1.240 mSv for lumbar spine,2.317 mSv for abdomen and 2.316 mSv for pelvis,respectively.Conclusions During digital tomography,the highest value of effective doses was estimated to be 2.719 mSv in thoracic vertebra group,followed by abdominal group 2.317 mSv and pelvic group 2.316 mS,with the lowest 0.524 mSv in head group.The main factors influencing the effective dose include tube voltage,total mAs,irradiation field size,main beam irradiation range,and the number of tissues or organs in scanned range.

Objective: To investigate the health of gypsum miners in Hubei province and analyze the health effects of occupational disease hazards exposure on gypsum miners. Methods: In April 2017, occupational disease hazard factors were tested on the site of a gypsum mine, and 500 workers were selected by random sampling to conduct questionnaires, relevant data such as occupational health examination was collected, and descriptive statistical analysis was performed. Results: The main occupational hazards of gypsum miners were gypsum dust and noise. The time-weighted average concentration of 8 h in the workplace was 4.32 to 9.34 mg/m³, and the post pass rate was 69.2% (9/13) ; Respiratory dust 0.13-5.15 mg/m³, post pass rate 75.0% (3/4). Gypsum miners had finger dysfunction and muscle numbness, joint pain (29.2%, 88/301) and chest pain and breathing difficulties (17.6%, 53/301). Followed by tinnitus, auricle pus, running water (4.7%, 14/301), abnormal muscle tension (2.7%, 8/301). The exposure of occupational disease hazards was associated with respiratory, auditory and neurological symptoms of gypsum miners. Conclusion The long-term exposure of gypsum workers to gypsum dust, noise and other harmful factors may result in obvious symptoms of respiratory system and other health damage.