OBJECTIVE To establish the basic quality control system for disinfection of medical apparatus and(instruments).in order to meet the national standards of the disinfection quality.METHODS On the basis of background investigation about the disinfection(management) of medical apparatus and instruments from 1997 to 2004 to implemeat the basic quality control system scientifically and continuously and to improve the management of disinfection quality in hospital.RESULTS The disinfection quality of commonly used medical apparatus and(instruments),first-aid devices,combat readiness materials,special instruments and sterilizer,etc was got to(improve) year by year,that created condition to control the emergence of hospital(infection).CONCLUSIONS To(avoid) the exogenous hospital infection due to unsuitable medical apparatus and(instruments).

Objective To explore the clinical outcomes of different mild-stimulation in poor ovarian responders in vitro culture/intracytoplasmic injection (IVF/ICSI) to provide the evidence for clinical treatment,and investigate clinical parameters including pre-ovulation rate,rate of oocytes retrieved,fertilization rate,good quality embryo rate,and pregnancy rate per cycle.Methods The clinical date of a total 180 IVF cycles of infertile patients undergone from Jan 2013 to May 2016 in medical reprodution center of Xiang Tan Central Hospital.According to the different methods of controlled ovarian hyperstimulation (COH),the cycles were divided into 3 groups:group A with 60 cycles of early five days using clomiphene,group B with 60 cycles of persistent using clomiphene,and group C with 60 cycles using artificial luteal-phase ovarian stimulation protocol.Results The basic situations in three groups were no significant difference (P ＞0.05).Compared to groups B and C,the pre-ovalution rate was more in group A (P ＜ O.05),and the rate of oocytes retrieved,fertilization rate,good quality embryo rate,and preganacy rate per cycle were higher in groups B and C (P ＜ 0.05).The rate of oocytes retrieved,fertilization rate,good quality embryo rate,and preganacy rate per cycle were no significant difference among gourps B and C.The good quality embryo rate and preganacy rate per cycle in groups B and C were higher than group A,and group B was higher than group A (P ＜ 0.05).Conclusions Persistent using clomiphene or persistent using clomiphene in COH could decrease the rate of pre-ovalution,and get more rate of oocytes retrieved,good quality embryo rate,and preganacy rate per cycle.

Objective: To observe the feasibility of ultrasound shear wave dispersion imaging (USWD) in evaluating carotid viscoelasticity. Methods: Totally 45 volunteers were recruited and divided into 2 groups according to age, i.e. ≥50 years old group (n=23) and <50 years old group (n=22). Four shear wave viscoelastic modulus of the common carotid artery (CCA), including shear wave elastic modulus values of the superficial and deep walls (SWES and SWED), shear wave dispersion values of superficial and deep walls (SWDS and SWDD) were obtained using USWD, respectively. In addition, the pulse wave velocity (PWV) was measured. The viscoelastic indexes were compared between the two groups, and the correlations with age, blood pressure and PWV were analyzed. Results: Before and after adjusted with body mass index, systolic blood pressure (SBP) and diastolic blood pressure (DBP), SWES, SWED, SWDS and SWDD were higher in <50 years old group than those in ≥50 years old group (all P<0.05). Among all subjects, SWE was negatively correlated with age, SBP, DBP and PWV, respectively (r=-0.282, -0.374, -0.321, -0.256, all P<0.05). SWD was negatively correlated with PWV in ≥50 years old group (r=-0.393, P=0.038), while positively correlated with SBP in <50 years old group (r=0.366, P=0.048). Conclusion: The viscoelasticity of arterial wall can be non-invasively and quantitatively assessed with USWD.

Objective: To detect the viscoelasticity of carotid artery in healthy volunteers using ultrasonic shear wave dispersion (SWD) technique, and explore the feasibility and influencing factors for SWD parameters. Methods: Forty-five healthy volunteers were recruited and divided into elder group (≥50 years old) and younger group (<50 years old) according to the age. The carotid arteries were examined by SWD at systole, axial elastic modulus (SWE_R) and viscous index (SWD_R) were obtained. The pulse wave velocity (PWV), a carotid artery circumferential elastic parameter was obtained and considered as the reference indicator. The difference of SWE_R, SWD_R and PWV were compared between two groups; and the correlation between them were analyzed by Pearson analysis, respectively. Results: ①Compared with the younger group, the carotid PWV increased, while SWE_R and SWD_R decreased in the elder group(all P<0.05). ②In all subjects, SWE_R was negatively correlated with PWV (r=-0.256, P<0.05). In the elder group, SWE_R was negatively correlated with systolic blood pressure (r=-0.357, P<0.05), and SWD_R was negatively correlated with PWV (r=-0.393, P<0.05). In the younger group, SWD_R was positively correlated with systolic blood pressure (r=0.366, P<0.05). Conclusions Compared with the elder group, the carotid viscoelasticity was higher in young people, and it is correlated with PWV. SWD can evaluate carotid viscoelasticity, and contribute to better understanding of its tissue characteristics.