Chronic cerebral hypoperfusion (CCH) may result in neurovascular unit (NVU) injury,causing cognitive impairment.The NVU consists of neurons,glial cells,vascular cells and extracellular matrix.The damage of NVU can induce the blood-brain barrier dysfunction,abnormal cell signaling,as well as cognitive impairment.However,its molecular mechanism is unclear.Thus,investigating the role of NUV in CCH-induced cognitive impairment may provide a theoretical basis for the novel treatment of cognitive impairment.

Numbering quantities of medical equipment is studied based on Queueing Theory, which can provide a useful and applicable tool for study on medical equipment numbering.

Objective To value the clinical application of diffusion tensor imaging (DTI) in cerebral diseases. Methods Six volunteers and 6 patients (including 3 patients with ischemic stroke and 3 patients with glioma) were examined by DTI and T1weighted, T2weighted MR scan. All data were processed with DtiStudio software to show the white matter fiber tracts. The fractional anisotropy (FA) of the diffusion tensor were measured between the affected and the unaffected side. Results The white matter fiber tract could be observed clearly on the FA map. The pyramidal tract with different degree disruption could be showed in 3 patients with ischemic stroke. Compression, displacement, infiltration or destruction of pyramidal tract, corpus callosum or internal capsule and external capsule could be seen in 3 patients with glioma, and FA was significantly reduced on the affected side as compared to the unaffected side. Conclusion Diffusion tensor imaging is useful in observing the damage and displacement of the white matter fiber tracts in vivo, beneficial to the surgical plan for patients and prognosing recovery of function.

AIM: To explore the clinical effects of high frequency electrical capsulotomy in maturation period cataract surgery.
●METHODS: A total of 68 cases of maturation period cataract were selected and underwent the surgery of continuous circular capsulorhexis using the high frequency electrical capsulotomy.
●RESULTS: The success rate was 91% in 68 cases with the high frequency electrical capsulotomy.
● CONCLUSION: The high frequency electrical capsulotomy in maturation period cataract surgery has significant advantages and brilliant clinical values.

OBJECTIVETo investigate the influence of male age on the pregnancy outcomes of in vitro fertilization-embryo transfer (IVF-ET).

METHODSWe retrospectively analyzed 7,533 cycles of IVF-ET performed between January 1, 2009 and October 31, 2013. We divided the samples into three groups according to the female age (< 30, 30-34, and 35-38 yr), each again subdivided into six groups based on the male age (< 30, 30-32, 33-35, 36-38, 39-41, and ≥ 42 yr). We compared the rates of implantation, pregnancy, miscarriage, and live birth among different age groups.

RESULTSThere were no statistically significant differences in basal E2, FSH, endometrium thickness on the day of hCG administration, number of oocytes retrieved, and days of embryo transfer among different male age groups (P > 0.05). The implantation rate showed an age-dependent decrease in the < 30, 30-32, 33-35, 36-38, 39-41, and ≥ 42 yr male groups, 41.1, 42.0, 39.5, 31.3, 40.7, and 48.6% among the women aged < 30 years (P < 0.05), 40.3, 36.4, 35.1, 35.3, 29.4, and 37.3% among the women aged 30-34 years (P < 0.05), and 48.2, 17.8, 25.3, 23.5, 22.1, and 23.8% among the women aged 35-38 years (P < 0.05). The miscarriage rate was significantly higher in the ≥ 39 yr than in the 30-32 and 33-35 yr male age groups among the women aged 30-34 years (P < 0.05), but showed no remarkable differences among the other male age groups in the women aged < 30 and 35-38 years (P > 0.05). No statistically significant differences were observed in the rates of pregnancy and live birth among different male age groups (P > 0.05).

CONCLUSIONMale age has some influence on the rates of implantation and miscarriage but not on the rates of pregnancy and live birth in IVF-ET.

Abortion, Spontaneous ; epidemiology ; Adult ; Age Factors ; Embryo Implantation ; Embryo Transfer ; Female ; Fertilization in Vitro ; Humans ; Male ; Oocyte Retrieval ; Pregnancy ; Pregnancy Outcome ; Pregnancy Rate ; Retrospective Studies ; Sex Factors

OBJECTIVETo study the diagnostic value of diffusion tensor imaging (DTI) in cervical spondylotic myelopathy.

METHODSTwenty healthy volunteers and fifty patients with cervical spondylotic myelopathy underwent DTI in the Affiliated Hospital of Medical College of Ningbo University from January 2014 to April 2015. Healthy volunteers served as controls. Fifty patients were divided into three groups (group A , B, C) according to cervical MRI scan standard. Group A (17 cases) had only the dura mater spinalis compressed; Group B (23 cases) showed the cervical spinal cord compressed, but no high signal in it; Group C (10 cases) had the cervical spinal cord compressed with high signal in the same level. The average apparent diffusion coefficients(ADC) and fractional anisotropy (FA)values in these examinee were analyzed and all subjects were performed fiber tracking.

RESULTSThere was no statistically significant differences in ADC and FA values in C2/C3, C3/C4, C4/C5, C5/C6, C6/C7 of control group (P>0.05). The average ADC and FA values in control group were (0.875 +/- 0.096) x10(3) mm2/s and 0.720 +/- 0.051, respectively; compared with group A,there was no statistically significant difference; compared with group B and C, there was significant difference; comparison among group A, B, C, there was significant differences.

CONCLUSIONDTI can early and accurately quantify the changes of microstructure in cervical spondylotic myelopathy. Fiber tracking can show the damage range of spinal cord lesions.

Adult ; Case-Control Studies ; Cervical Vertebrae ; diagnostic imaging ; Diffusion Tensor Imaging ; Female ; Humans ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Radiography ; Spinal Cord Diseases ; diagnostic imaging ; surgery ; Spondylosis ; diagnostic imaging ; Young Adult

AIM: To investigate the incidence of trachoma in children aged 1 to 9y in Hainan Province and determine high-risk trachoma endemic and non-endemic areas in Hainan, and thus provide evidence for developing trachoma control and prevention therapy.METHODS:The areas of investigation were chosen on the basis of past literatures, expert interviews and survey on the spot.In 2013, Hainan Provincial Office of Blindness Prevention carried out the survey in 7 counties including Dongfang City, Wuzhishan City, Ledong County, Baisha County, Baoting County, Lingao County and Changjiang County.In these districts, 356 pupils including 192 boys and 164 girls were examined, their age ranging from 1 to 9 and their average age being 7 years old.The targeted students received the trachoma rapid assessment by the adoption of simplified trachoma classification system which was recommended by the World Health Organization.RESULTS: No case of active trachoma was found among the 356 students.CONCLUSION:The prevalence rate of trachoma in children under 9 years is less than 5% in Hainan Province.Active trachoma is not a public health issue in Hainan Province.

Objective To investigate the correlative factors of sentinel lymph node(SN) metastasis status in breast cancer.Methods The clinical data of 115 patients with breast cancer who underwent sentinel lymph node biopsy(SLNB) and axillary lymph node dissection(ALND) during June 2004 through April 2006 were retrospectively analysed.The SN metastasis were evaluated with regard to tumor size(≤2cm, 2.1cm~4cm)and C-erbB-2、p53、nm23、ER、PR status.Results Of the 115 patients SN was identified in 110(95.65%).An average of 1.97 SNs were examined per patient.Ninety-five(86.37%)of 110 patients were correctiy diagnosed in SN and AN.Thirty-six(37.89%)of 95 patients were SN positive,and 59(62.11%)were SN negative.Among the patients,SN metastasis rate in tumors 2.1cm~4cm((50.94)%) in diameter was highter compared with those ≤2cm(23.43%) in size(P0.05).Conclusions Tumor size and C-erbB-2 status were significantly associated with SN metastasis and may be used to predict SN metastasis in invasive breast cancer.

0.05). Conclusions The therapeatic effect of breast-conserving therapy of stage I,and IIa breast cancer located ≥3cm of the nipple is similar to that of modified radical mastectomy. Breast-conserving therapy can gradually become the operation of first choice for stage I and IIa breast cancer.

Objective To investigate the expression of oncogene survivin,p53 in breast cancer and its ~prognostic significance. Methods The expression of survivin,p53 in breast cancer tissues of 80 cases were detected by immunohistochemistry S-P method, and its correlation with axillary lymph node metastasis and ~5-year disease free survival (DFS) was analysed.Results In breast cancer tissues,survivin gene positive ~expression rate was 68.75%(55/80), p53 gene positive expression rate was 46.25%(37/80), and both had a positive correlation with axillary lymph node metastasis but negative correlation to 5 years DFS(P0.05);survivin and p53 genes expression have positive corrlation(P