OBJECTIVE To study the clinical feature of nosocomial infection and analyze the correlative reasons,to offer the scientific theory basis for preventing and controlling the nosocomial infection. METHODS A retrospective survey was undertaken in the data of hospitalized cases during 2007. RESULTS Totally 2325 nosocomial infections in 54 505 patients were analyzed in 2007.The infection rate of nosocomial infection was 4.27%;the highest infection rate was in ICU(33.57%);the infection sites were different in distinct departments and the most common infection site was lower respiratory tract(27.19%);among pathogens isolated from nosocomial infection cases,48.05% of them were Gram-negatives,23.25% were virus,14.45% were fungi,and 14.15% were Gram-positives;the infection rate was diverse in different months. CONCLUSIONS Nosocomial infection rate is related to different underlying diseases;there are many effective actions to reduce the nosocomial infection,such as strengthening the nosocomial infection management,using the antibacterial drugs reasonably and preventing communicable diseases prevalence.

Objective To investigate the clinical effect and safety of spleen-preserving surgery by microwave tissue coagulation (MTC) therapy.Methods Retrospectively analyzed the clinical data of 45 cases undergoing spleen retaining surgery by MTC therapy (observation group) and comparative study was used on another 45 cases experiencing splenectomy (comparative group),clinical effect and complications were compared.All cases were patients from Jan.2010 to Jun.2013.Results All cases were cured.Hospitalization of observation group is obviously shorter than that of comparative group(P =0.007).The rate of complication in observation group(4.44％) is lower than that in comparative group (20.00％),but the time and amount of bleeding in operation of observation group is much more than that of comparative group.Conclusion MTC can effectively guarantee patients safety,shorten hospital stay,and be worthy of popularization.

Objective Shkbp is also called Shkbp1,can competitively inhibit binding CIN85 and c-Cbl,thereby blocking the epidermal growth factor receptor (EGFR) endocytosis and degradation,to play a role in tumor promotion.This study aims to explore the changes in blood cell classification and T cell subsets in blood,bone marrow,and spleen in Shkbp1-deletion (Shkbp-1-/-) mice.Methods Shkbp-1-/-transgenic mice were identified by PCR genotyping.Blood cell classification was performed using an automatic classification system.Flow cytometry was used to detect the T lymphocyte subsets in the blood,bone marrow,and spleen of Shkbp-1-/-and control mice.Results Routine blood examination showed that neutrophils and eosinophils tended to increase and showing significant differences,and there was no significant difference in lymphocytes.The flow cytometry results showed that there was a decrease of CD4+CD8+ double positive cells and increase of bone marrow CD3+ and CD4+ cells in the control group.However,there was a decreasing trend of CD3+,CD4+,CD8+,and CD4+CD8+ cells in the spleen tissues.Conclusions Shkbp1 is involved in the maturation and differentiation of blood cells,and affects the number of immune cells.This study lays a foundation for the study of how Shkbp1 is involved in the differentiation of blood cells.

Objective PSGL-1 is specifically expressed in leucocytes.The aim of this study was to explore the changes of myeloid-derived suppressor cells (MDSCs) in the spleen and bone marrow in PSGL-1-deficient mice.Methods PSGL-1 -/-mice were used in the experiment.After identification of the offsprings, flow cytometry was used to test the expression of CD11b and Gr-1 in C57 and PSGL-1 -/-mice.Results Compared with the C57 mice, the expression of MDSCs was up-regulated in the PSGL-1-deficient mice ( P <0.001).Conclusion The expression of MDSCs is upregulated in PSGl-1-deficient mice.

Objective To investigate the incidence and etiological factors of hyponatremia following traumatic brain injury (TBI) and analyze the relationship between hyponatremia and the patient’s age, gender, type of injury, Glasgow coma scale (GCS), operation and computerized tomography (CT) scan of head. Methods Clinical data of 136 pa-tients with moderate or severe TBI in our hospital were analyzed retrospectively, including patient’s age, gender, type of injury, GCS, operation, brain edema and basal skull fracture. The relationship between clinical data and hyponatremia were analyzed statistically by Chi-square test and multivariate Logistic regression analysis. Results There were 56 pa-tients with hyponatremia in 136 patients (81 males) with moderate or severe TBI. Multivariate Logistic regression analysis showed that hyponatremia secondary to TBI was not associated with patient’s age, gender, type of injury and operation or not. However, there was a high correlation between hyponatremia following TBI and clinical characteristics of TBI at ear-ly stage, such as GCS, brain edema and basal skull fracture. Conclusions Patients with TBI is more likely to develop hy-ponatremia when they have the following clinical factors, such as GCS≤8, brain edema or basal skull fracture. Preven-tive measures should be given to these patients in advance.