Objective To explore a reasonable and secure anesthesia induction in painless induced abortion.Methods 120 patients of painless induced abortion were randomly divided into six groups,control group was injected with Propofol 3.5mg/kg through vein,besides given Propofol 3.5mg/kg,other 5 groups were injected with ketamine 0.1mg/kg、0.2mg/kg、0.3mg/kg、0.4mg/kg、0.5mg/kg through vein respectively.The parameter of hemodynamics,effect of analgesia,time of unconsciousness,recovery time of consciousness,recovery time of orientation,incidence of respiratory depression,side effect,time of discharge from hospital were observed.Results The recorded time and incidence of side effect have statistical significance between group of ketamine 0.5mg/kg and group of ketamine 0.3mg/ks(P<0.05);effect of analgesia have statistical significance between group of ketamine 0.3mg/kg、0.4mg/kg、0.5mg/kg and control group.Conclusion Ketamine 0.3mg/kg combined with Propofol is an ideal choice of painless induced abortion.

BACKGROUND:Resection of femoral neck in the conventional total hip replacement greatly influences the equilibrium of forces jn the proximal fetour and causes disequilibrium of bone reconstruction,easily resulting in bone absorption,prosthesis loosening and dislocation.OBJECTIVE:To investigate the biocompatibility between materials and host in the total hip replacement with femoral neck preserved.DESIGN,TIME AND SETTING:A retrospective case analysis was performed in the Department of Orthopedics,the 180 Hospital of Chinese PLA between September 2000 and December 2006.PARTICIPANTS:Twenty-five patients.10 males,15 females,aged 47 years old(range 31-56 years old)were recruited for this study.Twelve patients suffered from femoral head necrosis-caused hip joint disease and osteoarthrosis(bilaterally affected in 5 patients),eight femoral head necrosis(femoral head necrosis subsequent to femoral neck fracture healing in 2 patients),three acetabular dysplasia necrosis of femoral head,and two infra-head femoral neck fracture nonunion.The course of disease averaged 6 years old ranging from 2-10 years.METHODS:Modified hip ioint posterior approach was used to expose the hip joint.Femoral head was resected from the femoral head-neck iuncture.Cartilago acetabularis was stripped and then artificial acetabulum was installed.Femoral proximal medullary cavity was expanded.Artificial femoral head was installed.Finally,all artificial joints were reduced.MAIN OUTCOME MEASURES:(1)Biocompatibility between prosthesis and host.(2)Function recovery of hip joint.RESULTS:All wounds were primarily healed.Patients were followed up for 0.5-6 years on average.Follow-up results demonstrated good hip joint motion and normal walking gait.X-ray showed well-positioned artificial hip joint,absence of prosthesis loosening and dislocation,as well as good femoral neck sclerotin.CONCLUSl0N:The preservation of femoral neck in total hip replacement is fit to the physiological compliance of proximal femar and prevents osteoporosis-induced prosthesis loosening and dislocation in the proximal femur.

Objective:To attain comprehensive insight into the diagnostic X-ray equipment and examination frequency in radiological diagnosis and treatment institutions in Wuhan, with the purpose of assisting the health administration department in formulating medical exposure protection strategies and efficiently allocating radiological diagnosis and treatment resources.Methods:Using the census method, questionnaires on the basic information on diagnostic X-ray equipment and the annual number of examinations filled out in 2022 by the 1 030 radiological diagnosis and treatment institutions (excluding military and armed police hospitals) were collected through the Wuhan Prevention and Treatment Information Management Platform for Occupational Diseases. To obtain the data on number and frequency of diagnostic X-ray examinations, the different types of diagnostic X-ray examinations were divided by the total number of permanent residents by the end of 2021 in Wuhan.Results:In Wuhan, 1 030 radiological diagnosis and treatment institutions had 7 062 radiation workers and 2 540 diagnostic X-ray units of various types. 37.76% of units and 75.01% of radiation workers were concentrated in tertiary hospitals. The number of diagnostic X-ray units per million population was 186.10, with the top two being 48.65 DR machines per million population and 31.21 intraoral dental machines per million population. The total number of diagnostic X-ray examinations was 11 884 582, with plain radiographs and computed tomography (CT) examinations accounting for 43.61% and 43.59% of the total, respectively. The annual frequency of examinations was 379.75 and 379.52 per 1 000 population, respectively. Radiodiagnosis and treatment resources were higher in central urban areas than that in remote urban areas.Conclusions:The development of diagnostic X-ray equipment in Wuhan was experiencing rapid growth, with potential for further expansion, and the frequency has not yet recovered to the level before the COVID-19 pandemic. The allocation of radiodiagnosis and treatment resources between central urban areas and remote urban areas needs to be coordinated and the management of medical radiation protection should be continuously strengthened, so as to promote the sustainable development of inter-regional radiodiagnosis and treatment, and ensure the health and safety of examinaed patients and indivuduals.