BACKGROUND: Differences of thick and thin tissues in imaging areas is great because of postero-anterior images in cervical spine-thoracic spine.Although there are many image processing functions in direct digital radiography(DR)image with big range dynamic exposing,but routine direct DR hardly reveals anatomic structure of cervical spine-thoracic spine to detect diseases.Image quality of cervical spine-thoracic spine requires improvement.OBJECTIVE: To evaluate the difference between direct DR image with tissue equalization(TE)technique and standard DR in cervical spine-thoracic spine,so as to explore the best image quality in cervical spine-thoracic spine.METHODS: A total of 200 cases were randomly selected from DR cervical thoracic image from Department of Radiology,General Hospital of Chinese PLA between April 2005 and August 2009 to evaluate the difference between these images of DR processed by tissue equalization and that of standard DR.RESULTS AND CONCLUSION: The detail images of DR with tissue equalization in different thickness area of body could be revealed clearly in the same image,while the detail images of standard DR in cervical thoracic could be revealed clearly by adjusting window width and location repeatedly.Results show that the image quality of TE technique of direct digital X-ray radiography in cervical spine-thoracic spine could be clearly improved,it could be easily read and avoid the influence of body thickness area.Moreover,it could reveal clearly other part of body in detail.DR image with TE technique in cervical spine-thoracic spine can be applied widely due to simple operation,high diagnosis rate and low cost.

BACKGROUND:Borosilicate cannot only be mineralized to form hydroxy carbonate apatite layer, but also have strong chemical reactivity to promote bone cel regeneration. OBJECTIVE:To investigate the effect of the borosilicate bioglass on the growth behavior of rabbit osteoblasts through in vitro culture experiment. METHODS:The initial and secondary extracts of borosilicate bioglass were prepared according to the requirement of ISO10993-12: 2007. The bone marrow mesenchymal stem cels of rabbits were isolated and cultured. The second generation bone marrow mesenchymal stem cels were induced to differentiate into osteoblasts. The osteoblasts of the 5th-15th RESULTS AND CONCLUSION:The osteoblasts proliferation in the initial extract and secondary extract groups was better than that in the α-MEM medium group (P < 0.05). The osteoblasts proliferation in the initial extract group was better than that in the secondary extract group (P < 0.05). The total protein content of osteoblasts in the initial extract group was higher than that in the secondary extract and α-MEM medium group (P < 0.05). There were no significant differences in the alkaline phosphatase activity, apoptosis rate, horizontal migration distance of osteoblast and transmembrane cel number in Transwel between these three groups. These results demonstrate that borosilicate bioglass has good biocompatibility and has a certain benign regulatory role in generations were obtained and cultured with the initial and secondary extracts of borosilicate bioglass and α-MEM medium, respectively. The effects of borosilicate bioglass on the osteoblasts proliferation, protein synthesis, alkaline phosphatase activity, cel apoptosis, and cel migration in horizontal and vertical direction were observed.RESULTS AND CONCLUSION: The osteoblasts proliferation in the initial extract and secondary extract groups was better than that in the α-MEM medium group (P < 0.05). The osteoblasts proliferation in the initial extract group was better than that in the secondary extract group (P < 0.05). The total protein content of osteoblasts in the initial extract group was higher than that in the secondary extract and α-MEM medium group (P < 0.05). There were no significant differences in the alkaline phosphatase activity, apoptosis rate, horizontal migration distance of osteoblast and transmembrane cell number in Transwell between these three groups. These results demonstrate that borosilicate bioglass has good biocompatibility and has a certain benign regulatory role in osteoblast proliferation.

Objective:To explore the status and influencing factors of nurses′ cognitive ability of nursing interruptions in operating room.Methods:From March to May 2020, convenient sampling was conducted, a questionnaire was used to investigate the cognitive ability of operating room registered nurses in some provinces and cities in China. The influencing factors were analyzed by single factor analysis and multiple stepwise linear regression analysis.Results:Finally, 2 827 questionnaires were collected from 1 municipality directly under the central government and 15 provinces, involving 42 municipal and county hospitals. The nurses′ cognitive ability of nursing interruptions in operating room scored 105.73 ± 13.39, which was in the middle level. A total of 2 427 (87.37%) operating room nurses thought it necessary to receive training on nursing interruptions, but only 796 (28.16%) nurses had received training on nursing interruptions. Multiple stepwise linear regression analysis showed that different job categories ( B=-0.714, P<0.001), whether to pay attention to nursing interruptions ( B=5.449, P<0.001), the frequency of experience nursing interruptions ( B=-1.916, P<0.001)and whether to participate in the training of nursing interruptions ( B=-4.806, P<0.001) were the influencing factors of operating room nurses' cognitive ability of nursing interruptions. Conclusions:The operating room nurses' cognitive ability of nursing interruptions is in the middle level. The current situation of training is not good, but the training demand is high. Managers should strengthen the systematic training of nurses on nursing interruptions, especially those with junior nurses in operating room, to improve nurses' attention and cognitive ability of nursing interruptions.