Objective To carry out regularpersonnel capacity evaluation of quality control laboratory (QC Lab) staff,combinedwith the actual situation of the QC Lab and the requirement of national capacity assessment.Method Establish an evaluation program,including assessment items,frequency,eligibility criteria,etc,to effectively implement the program.Results Two evaluations were conducted for nine staff membersin the lab from 2015 to 2016.The pass rate of the four test items and operation of the instrumentwere 100％.The ability to solve the problem was variable among the staff.Conclusion According to the evaluation results,staff classification management and training will effectively promote the improvement of personnel capacity and ensure the quality of laboratory testing.

[Objective]To discuss the midterm effects of bipolar artificial femoral head arthroplasty in treatment of elder femoral neck fracture.[Method]From September 1995 to Febuary 2005,73 elderly patients with femoral neck fracture were operated with domestic bipolar artificial femoral head arthroplasty (average 74 years old).Forty-seven cases had been followed up for average 65 months.Harris score system and X-ray had been used for evaluation.[Result]There was no vessel and nerve injury,no infection and dislocation,no perioperative death.The complications included one greater trochanteric fracture,3 cases with pneumonitis,2 urinary infection,1 cerebral infarction,1 dysfunction in central nerve system and 1 case with deep venous thrombosis.Of all the 36 X-rays there were 3 cases with prosthesis subsidence,lucent line lesser 2mm in 2 cases,narrow joint space in 21 cases,protrusion in 1 case.According to the Harris scoring system,there were excellent in 12,good in 26,fair in 7,poor in 2.[Conclusion]Bipolar artificial femoral head arthroplasty are reasonable choice for treatment of femoral neck fracture in the elderly.Proper indication and perioperative management is critical to get good results.

Objective To identify the diagnostic criteria and investigate the incidence and distribution of the patellofemoral arthritis in aged people in Wuchuan region of the Inner Mongolia of China. Methods A population-based cross-sectional survey was conducted among 1030 residents aged 50 years and over of Wuehuan County, Inner Mongolia. Survey participants, mostly farmers, reported heavy physical activity, completed an interview-based questionnaire and Skyline View weight-bearing films were evaluated for KeU-gren and Lawrence (K/L) grade. Radiological patellofemoral arthritis (RPFA) and symptomatic patellofemoral arthritis (SPFA) were defined. Statistical package SPSS 14.0, crosstabs chi-squae test and Excel were adopted for statistical analysis. Results One thousanod and twenty-five participants were included in this study and 2050 knee joint Skyline View weight-bearing films were analyzed. The incidence of RPFA was 8.72%(6.8% in men, and 10.5% inwomen). The incidence of SPFA was 6.33% (4.8% in men, and 8.0% in women).The RPFA incidence of age groups 50～, 60～,≥70 was 3.8%, 10.6%, 22.9% respectively, while the incidence of SPFA was 2.7%, 7.7%, 17.3% respectively. The Three age groups' SPFA/RPFA was 71.7%, 72.0%, 75.6% respectively. The incidence of RPFA was 6.00/0, 7.3%, 11.0%, 11.3%, and the incidence of SPFA was 4.2%,5.2%, 7.3%, 9.6% and the four SPFA/RPFA was 70.0%, 71.3%, 66.7%, 84.8% in people whose BMI was less than 18.5, 18.5～, 23.0～ and higher than ≥25.0 kg/m~2 respectively, 73.6% people had joint pain among RPFA.Conclusion The prevalence of symptomatic patellofemoral arthritis in the rural areas of China is 6.8%, the incidence of that in women is higher than in men, and elder people suffer a high incidence. And the heavier the people are, the higher the incidence of patellofemoral arthritis.

Objective To carry out the performance evaluation on 3 hemoglobin analyzers-URIT-12,HemoCue Hb301 and CompoLab TS.Methods Verification of inter-run precision,intra-day precision,and correlation of the 3 analyzers using samples with different concentrations.Results The lower values of inter-run precision of URIT-12,HemoCue Hb301 and CompoLab TSoft were 1.46％,1.45％ and 1.32％,respectively,and the median values were 1.43％,0.56％ and 1.49％,respectively.The lower values of intra-day precision were 1.86％,1.62％ and 1.32％ respectively for URIT-12,HemoCue Hb301 and CompoLab TSoft,with the median values of 1.45％,1.95％ and 1.78％ and the higher values of 1.86％,1.74％ and 1.81％.Based on the results of Beckman-Coulter AcT5diff automatic blood cell analyzer,linear regression equation and correlation coefficient was calculated and expressed as y=0.960 2x+3.201 3,R2=0.973 4;y=1.112 1x-6.767 9,R2 =0.990 7;y=1.031 5x+0.634 7,R2=0.980 3,respectively.Conclusion The 3 hemoglobin analyzers have better inter-run precision and intra-day precision as well as good correlation with automatic blood analyzer,and thus can be applied in physical examinations before blood donation.

Objective:Through histological analysis, immunofluorescence staining, electrophysiological detection and Sensory and motor function evaluation to investigate the effects of 3D printed hydrogel scaffold combined with bone marrow mesenchymal stem cells (BMSCs) in promoting functional recovery of spinal cord injury.Methods:10% GelMA hydrogel and 10 6 U stem cell suspension were prepared into bioink of appropriate concentration to construct the biomimetic spinal cord scaffold through 3D printing platform. The scaffold was placed in the medium and cultured in an environment of 37 ℃ CO 2 incubator. The microstructure of the scaffolds and the distribution of BMSC in the scaffolds was observed by scanning electron microscope. CAM/PI staining and confocal microscopy were used to observe the survival of stem cells in the scaffolds and determine the biocompatibility of the scaffolds. The scaffolds were implanted into the subcutaneous tissues of the back of rats, and the subcutaneous tissues were determined by HE staining to detect the immunogenicity of the scaffolds. After the rat model of hemicytoma defect was made, stents were transplanted for treatment, and confocal microscopy was used to evaluate the regeneration of neurons and axons in local area of spinal cord injury. At the same time, BBB score was used to evaluate motor function, mechanical pain score was used to evaluate sensory function, and surface electrode detection method was used to evaluate electrophysiological recovery weekly. Results:The long spindle shaped BSMC were uniformly distributed in the scaffold with a loose reticular structure. The scaffolds had good biocompatibility, and the cell survival rate of the prepared scaffolds reached 96% after 24 hours of printing. After 28 days of subcutaneous transplantation, the immune rejection was mild and immunogenicity was low. It was shown that the regenerated spinal cord tissue in the treatment group was significantly increased compared with the control group, which was widely distributed with cells after 28 days by HE staining. It was confirmed that part of the regenerated spinal cord tissue was neurons by immunohistochemical staining.Compared with the injured group, the regeneration of neurons and axons in the treatment group were significantly increased by immunofluorescence staining and confocal microscopy. In the treatment group, the BBB score recovered to 10 points, while the control group only recovered to about 1 point in the first week, which was statistically significant. And it recovered to 17 in the fourth week, while the control group only recovered to about 4 point in the four week, which was statistically significant. The Angle of inclined plate support of the treatment group was restored to 40 degrees, while it was only restored to 22 degrees in the control group. The pain threshold of the treatment group decreased to 18.5 points, which was not statistically different from that of the control group. The latent recovery effect of electrophysiology in the treatment group was the same as that in the sham operation group and better than that in the control group.Conclusion:3D printing hydrogel scaffold with loose network structure is suitable for cell proliferation. It has well biological survival, low cytotoxicity and low immunogenicity, which promoted neurons and axons to recovery and extend so as to effectively promote the recovery of motor function, sensory function and neural signal transmission rate after spinal cord injury.

AimTo study the effects of glipizide and met formin on the serum IGF-1,IGF-2 in patients with type Ⅱ diabetes mellitus; Methods The effect of glipizide(n ＝ 40) and metformin(n ＝ 25) on serum IGF-1, IGF-2 in patients with type Ⅱ diabetes mellitus were compared with self- controlled study. Results In metformin-treated patients ,there were not significantly changes in fasting IGF-1 and IGF-2 concentrations, In glipizide-treated patients, there were markedly increased IGF-1 concentrations(181.8+ 104.5) vs (209.0+ 88.2) ng· ml-1(P＜0.05) while serum IGF-2 was not change. There was a significant reduction of blood glucose in two groups at the end of treatment(both P＜0.01), but C-peptide level was markedly increased(P＜0.05) only in glipizide-treatedpatients.Conclusion The changes of IGF-1 is markedly different between metformin-treated and glipizide-treated patients with type Ⅱ diabetes mellitus.

Local maxima in multimodality image registration based on mutual information is discussed in this paper. Particle swarm optimization (PSO) and filter preprocessing based on hamming window is used to search the registration parameters. Simulations have been done to illustrate that after low-pass filter preprocessing local maxima is eliminated to a great extent. In most case the global maxima can be found by PSO. Simulations illustrate the efficiency and accuracy of this method in registration strategy.
Algorithms ; Artifacts ; Diagnostic Imaging ; methods ; Humans ; Image Enhancement ; methods ; Image Processing, Computer-Assisted ; methods ; Subtraction Technique

Purpose To explore the feasibility of low radiation dose combined with lowdose contrast agent in thyroid CT enhanced scan and investigate the benefit of reducing radiation hazard and contrast agent damage to thyroid.Materials and Methods 120 patients assigned for thyroid enhanced CT scan were prospectively and randomly divided into four groups (each group was 30 patients).Group A:radiation dose 120 kV,180 mA,contrast agent dose 1.2 ml/kg;group B:radiation dose 120 kV,180 mA,contrast agent dose 1.0 ml/kg;group C:radiation dose 100 kV,100 mA,contrast agent dose 1.2 ml/kg;group D:radiation dose 100 kV,100 mA,contrast agent dose 1.0 ml/kg.CT values,background sign,background noise of thyroid were measured;signal to noise ratio (SNR) and contrast to noise ratio (CNR) were calculated;CT dose index of volume (CTDIvol),dose length product (DLP),and the effective dose (ED) were recorded and calculated.The image quality was evaluated and the data was statistically analyzed by two radiologists.Results CT values,background sign and background noise of thyroid,as well as CTDIvol,DLP,ED among four groups were statistical significant (P＜0.05);there was no significant difference in SNR,CNR and image quality scores among four groups (P＞0.05).Conclusion It is beneficial of reducing radiation hazard and side-effect of contrast agent from low radiation dose combined with low-dose contrast agent under the condition of ensuring diagnostic image quality.

The internal iliac artery originating from the common iliac artery is an important branch, and communicating with the branches of the abdominal aorta, such as lumbar artery and sacral median artery, forming rich collateral circulation and nourishing the blood supply of gluteal muscle and pelvic floor viscera. Surgical intervention is recommended when the maximum diameter of internal iliac artery aneurysms>2 cm. A variety of treatment modalities are available, particularly, endovascular technique has been successfully applied in the clinical treatment of internal iliac artery aneurysms, which can significantly improve the cure and reduce complications and deaths. This article reviews the previous literature and summarizes the progress of internal iliac artery aneurysms treatment.

Objective:To collect and analyze laboratory indicators of patients of different sexes after blood transfusion, evaluate the effectiveness of blood transfusion, and provide a theoretical basis for formulating more scientific blood transfusion plans.Methods:The clinical data of 808 patients who underwent blood transfusion in The First Affiliated Hospital of Anhui University of Science and Technology from January 2020 to December 2021 were retrospectively analyzed. According to the blood transfusion strategy and the department to which the patients were admitted, these patients were divided into four groups: surgical restrictive blood transfusion group (group A: 72 males and 69 females), surgical non-restricted blood transfusion (group B: 77 males and 118 females), medical restrictive blood transfusion (group C: 184 males and 126 females), and medical non-restricted blood transfusion (group D: 110 males and 52 females). Univariate and multivariate Logistic regression analyses were performed.Results:In group A, after blood transfusion, hemoglobin level in female patients was significantly higher than that in male patients [79.0 (71.5, 87.0) g/L vs. 75.5 (69.0, 82.8) g/L, Z = -2.18, P = 0.029], and C-reactive protein in female patients was significantly lower than that in male patients [21.3 (0.0, 56.0) mg/L vs. 37.0 (3.3, 95.5) mg/L, Z = -1.97, P = 0.049]. In groups B, C, and D, there were no significant differences in hemoglobin, C-reactive protein, and hematocrit between male and female patients (all P > 0.05). Multivariate analysis showed that the difference in hemoglobin levels between before and after blood transfusion was statistically significant ( P = 0.009). After a blood transfusion, hemoglobin level in female patients was 1.44 times that in male patients. Conclusion:The tolerance of female patients to blood loss is higher than that of male patients in surgical restrictive blood transfusion, so the threshold value of hemoglobin given to female patients during blood transfusion can be lower than that of male patients. In the case of the same blood loss, priority of blood transfusion can be given to male patients. In the case of scarce blood resources, the total amount of blood transfused for female patients can be approximately reduced.