Objective To provide evidence for a more reasonable method of determining red bone marrow dose by analyzing and comparing existing simulation methods.Methods By utilizing Monte Carlo simulation software MCNPX,the absorbed doses of red hone marrow of Rensselaer Polytechnic Institute (RPI)adult female voxel phantom were calculated throush 4 different methods:direct energy deposition.dose response function(DRF),King-Spiers factor method and mass-energy absorption coefficient (MEAC).The radiation sources were defined as infinite plate.sources with the energy ranging from 20 keV to 10 MeV.and 23 sources with different energies were simulated in total.The source was placed right next to the front of the RPI model to achieve a homogeneous anteroposterior radiation scenario.The results of different simulated photon energy sources through different methods were compared.Results When the photon energy was lower than 100 key,the direct energy deposition method gave the highest result while the MEAC and King-Spiers factor methods showed more reasonable results.When the photon energy was higher than 150 keV taking into account of the higher absorption ability of red bone marrow at highcr photon energy,the result of the King-Spiers factor method was larger than those of other methods.Conclusions The King-Spiers factor method might be the most reasonable method to estimate the red bone marrow dose from external radiation.

OBJECTIVE To control the spread of multi-drug resistant(MDR) bacteria in hospital and to ensure patients′ medical safety.METHODS We had established a network monitoring system,improved MDR monitoring,enhanced management of antibiotics rational use and cut off the transmission of MDR bacteria.RESULTS After taken these measures,the standard preventing of medical workers,handwashing compliance and specimen censorship rate had been greatly improved.Antimicrobial drug use was more standardized.In the last two years,we hadn′t found any epidemic outbreak due to MDR bacteria event.CONCLUSIONS Taking comprehensive prevention and control measures can prevent and control the development and proliferation of MDR bacteria and ensure patients′ medical safety.

【Objective】 To investigate the status of blood safety and the effectiveness of preventive measures. 【Methods】 The data of Fengxian Blood Bank from 2018 to 2020 were extracted from Shanghai blood collection and supply information system. HBsAg sero-conversion samples of repeated blood donors were confirmed, and HBV serologic supplemental test were performed to obtain the number of new infections during the blood donation interval. The incidence and residual risk of HBV infection were evaluated by the sero-conversion model in donation intervals for repeated donors, and residual risk trend between the study period of 2002 to 2005, 2007 to 2011, 2011 to 2013 and 2018 to 2020 was compared. 【Results】 During 2018~2020, nine new HBV infections occurred among repeated donors during blood donation interval, with an incidence rate of 2.71 per 10 000. The residual risk of window period HBV transmission by transfusion could be reduced by 58.33% using HBsAg test plus NAT (HBsAg test 1∶30 637 vs HBsAg test plus NAT 1∶73 529). The residual risk of HBV transmission was decreasing when stratifying by periods, especially one order of magnitude dropped in 2018~2020 as in comparison of 2002 to 2005. 【Conclusion】 The residual risk of HBV transmission by transfusion showed a decrease trend. Although NAT could greatly reduce the risk, comprehensive preventive measures are needed to further reduce the risk.

Objective To investigate the therapeutic effect of oral viaminate(a vitamine A acid derivative)on acne and its effect on the expression of androgen receptor.Methods Two hundred and eigh-teen patients with acne were allocated to treatment group and control group at random:treatment group was treated by oral viaminate;control group was treated by oral minocycline.The treatment lasted for four weeks.The effect of viaminate on the expression of androgen receptor was studied in COLO-16cells in vitro by using Northern blot or Western blot.Results The therapeutic effect of oral viaminate in treatment group was higher than that in control group(P

Objective To explore effect comparison between high flux hemodialysis and conventional hemodialysis therapy on acute exacerbation chronic obstructive pulmonary diseases (AECOPD) patients with renal insufficiency.Methods Clinical data of 51 AECOPD combined renal insufficiency (BUN≥20 mmol/L,CREA≥400 μmol/L) cases admitted in ouRhospital and Guiyang First People′s Hospital from 2010 to 2015 were retrospectively analyzed.And were randomly divided into high flux hemodialysis (HFHD) group with 25 cases and conventional hemodialysis (CHD) group with 26 cases according to different dialysis method and dialysis,and the two groups before treatment all used the same internal medicine comprehensive treatment.Blood leukocyte count,neutrophil percentage,blood gas index[pH、SaO2、p(O2)],c-reactive protein (CRP) and interleukin-1 (IL-1),interleukin-6 (IL-6) and renal function (BUN and CREA) before and afteRtreatment were detected,and the difference of the above indexes before and afteRtreatment in both groups were compared.Results Leukocyte count,neutrophil percentage,CRP,IL-1,IL-6,BUN and CREA in two groups afteRtreatment were significantly decreased than treatment before (P<0.01),but HPHD group decreased more than CHD group (P<0.05).Blood and gas index in HPHD group and CHD group afteRtreatment fell,but there was no significant difference (P<0.05).Conclusion High flux hemodialysis (HPHD) has superioRcurative effect in the treatment of AECOPD and in removing inflammatory mediators,infection control,improving renal function,so it is worthy of clinical application.

Objective To explore effect comparison between high flux hemodialysis and conventional hemodialysis therapy on acute exacerbation chronic obstructive pulmonary diseases (AECOPD) patients with renal insufficiency.Methods Clinical data of 51 AECOPD combined renal insufficiency (BUN≥20 mmol/L,CREA≥400 μmol/L) cases admitted in ouRhospital and Guiyang First People′s Hospital from 2010 to 2015 were retrospectively analyzed.And were randomly divided into high flux hemodialysis (HFHD) group with 25 cases and conventional hemodialysis (CHD) group with 26 cases according to different dialysis method and dialysis,and the two groups before treatment all used the same internal medicine comprehensive treatment.Blood leukocyte count,neutrophil percentage,blood gas index[pH、SaO2、p(O2)],c-reactive protein (CRP) and interleukin-1 (IL-1),interleukin-6 (IL-6) and renal function (BUN and CREA) before and afteRtreatment were detected,and the difference of the above indexes before and afteRtreatment in both groups were compared.Results Leukocyte count,neutrophil percentage,CRP,IL-1,IL-6,BUN and CREA in two groups afteRtreatment were significantly decreased than treatment before (P<0.01),but HPHD group decreased more than CHD group (P<0.05).Blood and gas index in HPHD group and CHD group afteRtreatment fell,but there was no significant difference (P<0.05).Conclusion High flux hemodialysis (HPHD) has superioRcurative effect in the treatment of AECOPD and in removing inflammatory mediators,infection control,improving renal function,so it is worthy of clinical application.

Objective: Whether peripheral blood 5-hydroxytrptamine (5-HT) levels serve as biomarker for depression diagnosis/response evaluation has not been well determined. This work was explored to address this inconclusive issue. Methods: Animals were randomized into normal control group (NC, n = 10) and chronic unpredictable mild stress model group (CUMS-model, n = 20), respectively. Animals in CUMS-model group were subjected to chronic stress, then they were randomly subdivided into CUMS subgroup and CUMS + fluoxetine subgroup (CUMS + FLX). After FLX treatment, blood and tissues were collected. 5-HT and relevant protein expression were measured. Results: In mice model, there was a significant increase in serum and a significant reduction in plasma 5-HT levels in CUMS-model group versus NC group, while platelet 5-HT levels change little. After FLX treatment, serum and platelet 5-HT levels were significantly decreased in CUMS + FLX subgroup, while plasma 5-HT levels had not much change versus CUMS subgroup. Chronic stress enhanced colon and platelet serotonin transporter (SERT) expression and FLX treatment mitigated SERT expression. In rats’ model, there was a significant increase in serum 5-HT levels while plasma and platelet 5-HT levels showed little change in CUMS group versus NC group. After FLX treatment, serum, plasma and platelet 5-HT levels were significantly decreased in CUMS + FLX subgroup versus CUMS subgroup. The profile of relevant proteins expression changed by FLX were like those in mice. Conclusion Serum 5-HT levels might serve as a potential biomarker for depression diagnosis, meanwhile serum and platelet 5-HT levels might respond to antidepressant treatment.

Objective: Whether peripheral blood 5-hydroxytrptamine (5-HT) levels serve as biomarker for depression diagnosis/response evaluation has not been well determined. This work was explored to address this inconclusive issue. Methods: Animals were randomized into normal control group (NC, n = 10) and chronic unpredictable mild stress model group (CUMS-model, n = 20), respectively. Animals in CUMS-model group were subjected to chronic stress, then they were randomly subdivided into CUMS subgroup and CUMS + fluoxetine subgroup (CUMS + FLX). After FLX treatment, blood and tissues were collected. 5-HT and relevant protein expression were measured. Results: In mice model, there was a significant increase in serum and a significant reduction in plasma 5-HT levels in CUMS-model group versus NC group, while platelet 5-HT levels change little. After FLX treatment, serum and platelet 5-HT levels were significantly decreased in CUMS + FLX subgroup, while plasma 5-HT levels had not much change versus CUMS subgroup. Chronic stress enhanced colon and platelet serotonin transporter (SERT) expression and FLX treatment mitigated SERT expression. In rats’ model, there was a significant increase in serum 5-HT levels while plasma and platelet 5-HT levels showed little change in CUMS group versus NC group. After FLX treatment, serum, plasma and platelet 5-HT levels were significantly decreased in CUMS + FLX subgroup versus CUMS subgroup. The profile of relevant proteins expression changed by FLX were like those in mice. Conclusion Serum 5-HT levels might serve as a potential biomarker for depression diagnosis, meanwhile serum and platelet 5-HT levels might respond to antidepressant treatment.

Objective: Whether peripheral blood 5-hydroxytrptamine (5-HT) levels serve as biomarker for depression diagnosis/response evaluation has not been well determined. This work was explored to address this inconclusive issue. Methods: Animals were randomized into normal control group (NC, n = 10) and chronic unpredictable mild stress model group (CUMS-model, n = 20), respectively. Animals in CUMS-model group were subjected to chronic stress, then they were randomly subdivided into CUMS subgroup and CUMS + fluoxetine subgroup (CUMS + FLX). After FLX treatment, blood and tissues were collected. 5-HT and relevant protein expression were measured. Results: In mice model, there was a significant increase in serum and a significant reduction in plasma 5-HT levels in CUMS-model group versus NC group, while platelet 5-HT levels change little. After FLX treatment, serum and platelet 5-HT levels were significantly decreased in CUMS + FLX subgroup, while plasma 5-HT levels had not much change versus CUMS subgroup. Chronic stress enhanced colon and platelet serotonin transporter (SERT) expression and FLX treatment mitigated SERT expression. In rats’ model, there was a significant increase in serum 5-HT levels while plasma and platelet 5-HT levels showed little change in CUMS group versus NC group. After FLX treatment, serum, plasma and platelet 5-HT levels were significantly decreased in CUMS + FLX subgroup versus CUMS subgroup. The profile of relevant proteins expression changed by FLX were like those in mice. Conclusion Serum 5-HT levels might serve as a potential biomarker for depression diagnosis, meanwhile serum and platelet 5-HT levels might respond to antidepressant treatment.

Objective: Whether peripheral blood 5-hydroxytrptamine (5-HT) levels serve as biomarker for depression diagnosis/response evaluation has not been well determined. This work was explored to address this inconclusive issue. Methods: Animals were randomized into normal control group (NC, n = 10) and chronic unpredictable mild stress model group (CUMS-model, n = 20), respectively. Animals in CUMS-model group were subjected to chronic stress, then they were randomly subdivided into CUMS subgroup and CUMS + fluoxetine subgroup (CUMS + FLX). After FLX treatment, blood and tissues were collected. 5-HT and relevant protein expression were measured. Results: In mice model, there was a significant increase in serum and a significant reduction in plasma 5-HT levels in CUMS-model group versus NC group, while platelet 5-HT levels change little. After FLX treatment, serum and platelet 5-HT levels were significantly decreased in CUMS + FLX subgroup, while plasma 5-HT levels had not much change versus CUMS subgroup. Chronic stress enhanced colon and platelet serotonin transporter (SERT) expression and FLX treatment mitigated SERT expression. In rats’ model, there was a significant increase in serum 5-HT levels while plasma and platelet 5-HT levels showed little change in CUMS group versus NC group. After FLX treatment, serum, plasma and platelet 5-HT levels were significantly decreased in CUMS + FLX subgroup versus CUMS subgroup. The profile of relevant proteins expression changed by FLX were like those in mice. Conclusion Serum 5-HT levels might serve as a potential biomarker for depression diagnosis, meanwhile serum and platelet 5-HT levels might respond to antidepressant treatment.