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Objective: To analyze and explore the measurement of magnetic interference and shielding of the installation environment of magnetic resonance (MR) system so as to satisfy the normal operation of MR system. Methods: The external environment and dynamic interference environment before the MR system was installed were evaluated, and the influences of magnetic line of force of central magnetic field (such as magnet) were further analyzed. Results: When the site of machine room of MR system was selected, the magnetic interference and its influence should be considered at the first step, and the shielding measurement should be provided. And the implemented magnetic shielding and measurement of radio shielding should depend on the actual environment so as to take the superconductive MR machine room with the basic condition of operation of MR system. Conclusion: An assessment of magnetic interference and shielding of installation environment of MR system is the key link that ensures installation work of MR system can be smoothly completed.
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Objective: To analyze the risk of laws and regulation of power failure in clean operating room under the abnormal state, and discusses the problems that related with power supply and guarantee. Methods: Through analyzed operating characteristics of using electric power of instrument in clean operation room and the effect of power failure for clean operation room so as to pointedly propose guarantee measurement for electric power. Results: Back-up power of clean operation room, especially the coordination of uninterrupted power system of online and generator set, could provide electric support for medical equipment that applied for life support when suddenly power failure. Conclusion:The emergency power supply system is determined to guarantee the power supply for clean operation room under emergency state, so as to satisfy the reserved guarantee for the requirement of electric supply in the clean operation room.
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Objective To improve the oxygen concentrator in the medical gas pipeline system according to standard YY 1468-2016 Oxygen concentrator air supply system for medical gas pipeline system.Methods Standard YY 1468-2016 about to be implemented was analyzed based on standard YY/T 0298-1998 Medical molecular sieve oxygen generator general technical specification.Management measures were proposed for the oxygen concentrator according to standard YY 1468-2016.Results The oxygen concentrator in the medical gas pipeline system was optimized so that the requirements of compulsory standards were met.Conclusion The oxygen concentrator in the medical gas pipeline system has to be enhanced in running,supervision and management to meet the requirements of the new standard.
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<p><b>BACKGROUND</b>The placement of an enteral feeding tube is the foundation for providing enteral nutrition. But due to the anatomic complexity of the stomach and the duodenum, to a certain degree, there are some technical difficulties in the placement of postpyloric feeding tube, especially in critically ill patients. This study aimed to evaluate the efficacy and safety of placing nasoenteral feeding tube with a transnasal ultrathin endoscope.</p><p><b>METHODS</b>Totally 49 patients, involving 46 (93.9%) being American Society of Anesthesiologists Physical Status (ASA-PS) grade III (n = 3) and grade IV (n = 43), in whom a nasoenteral feeding tube was placed with a transnasal ultrathin endoscope by using over-the-wire technique. The related clinic information during the procedure including success rate, time required, complications and monitoring results of vital signs was analyzed.</p><p><b>RESULTS</b>The tube was placed at or beyond the Treitz's ligament in all of the 49 cases and the total tube-placement success rate was 100% including the one-time tube-placement success rate 95.9%. The tube placement was successful in 46 (93.9%) cases by transnasal method and 3 (6.1%) cases by transoral method. In the 47 cases whose one-time tube-placement success was obtained, the average procedure time was (6.2 +/- 5.6) minutes. For the 3 patients the endoscope inserted transorally due to the failure of transnasal insertion, the total procedure time was (12.3 +/- 2.1) minutes. In the period of nasoenteral tube placement, the average systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR) and average pulse oxygen saturation (SpO(2)) did not show any significant change. Apart from 3 patients in whom nausea occurred in the procedure and 2 nasal bleeding, no any other acute complications arose.</p><p><b>CONCLUSION</b>The method of placing nasoenteral feeding tube with the transnasal ultrathin endoscope is not only efficient, time-saving, technically simple, and painless to patients, but also safe especially in critically ill patients.</p>
Subject(s)
Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Critical Illness , Endoscopes , Enteral Nutrition , Methods , Intubation, Gastrointestinal , Methods , Vital SignsABSTRACT
<p><b>OBJECTIVE</b>To observe the influence of combined injection with human interferon (hlFNgamma) and human insulin-link growth factor-1 (hIGF-1) on regeneration and fibrosis of skeletal muscle after acute contusion.</p><p><b>METHODS</b>A standard contusion model was reproduced at the right gastrocnemius in 64 male mice of 7 to 12 weeks. All the mice were randomly divided into 4 groups, such as group A (injection with hIFNgamma), group B (injection with hIGF-1), group C (injection with hIGF-1 and hIFNgamma), and group D (injection with physiological saline as control). All injections were introduced on day 10 after injury at local injured gastrocnemius. Before intervention (7 d following injury), and 4 d, 18 d, 32 d after intervention, the local injured gastrocnemius were harvested from 4 mice of each group. Then the expression of MHC- II b and vimentin was detected by real time PCR and immunohistochemistry techniques.</p><p><b>RESULTS</b>(1) At the each time following intervention, the expression of MHC-II b mRNA and protein in local injured muscle of group B and C were significantly higher than those of group A and D. (2) After intervention,the expression of vimentin mRNA and protein in local injured muscle of group A, group B, and group C were more inhibited than those of group D. The inhibition of vimentin expression in group A and C was significant.</p><p><b>CONCLUSION</b>It is indicated that injection of hIGF-1 into the injured skeletal muscle following acute contusion could enhance muscle regeneration,and inhibit fibrosis to some extent. (2) It is identified that hIFNgamma injected into injured muscle has the effect of anti-fibrosis, which is more significant than that of hIGF-1. (3) Combined injection with hIGF-1 and hIFNgamma could improve muscle regeneration and inhibit fibrosis simultaneously, and promote the healing of injured muscle.</p>
Subject(s)
Animals , Male , Mice , Immunohistochemistry , Injections , Insulin-Like Growth Factor I , Interferon-gamma , Mice, Inbred C3H , Muscle, Skeletal , Wounds and Injuries , Myosin Heavy Chains , Genetics , Polymerase Chain Reaction , RNA, Messenger , Transforming Growth Factor beta1 , Vimentin , Genetics , Wound HealingABSTRACT
<p><b>OBJECTIVE</b>To explore the clinical value of endoscopic mucosal resection (EMR) on early gastrointestinal cancer and precancerous lesion.</p><p><b>METHODS</b>The EMR data of 42 lesions from 28 patients, collected from Apr. 2001 to Dec. 2005, were retrospectively analyzed. All the lesions were confirmed histologically before and after operation.</p><p><b>RESULTS</b>Forty-two lesions were removed by the EMR from 28 patients. Lesion types observed under endoscopy were as follows: type I 9 lesions (type Isp 2 lesions, type Is 7 lesions), type II 33 lesions (type IIa 23 lesions, type IIa + IIc 4 lesions, type IIb 6 lesions). Thirty-eight EMRs were performed by using snare resection techniques and 4 EMRs by using suction cap-assisted techniques. The size of lesions changed from 0.6 cm x 0.6 cm to 3.0 cm x 3.5 cm. Complete resections were achieved in 36 of 40, among them, 2 lesions were divided into 2 pieces and 1 lesion was divided into 3 pieces. Post-EMR histopathologic evaluation revealed the following</p><p><b>RESULTS</b>carcinoma in 4 lesions, high-grade dysplasia (HGD) in 11 lesions, middle-grade dysplasia (MGD) in 17 lesions, adenoma in 6 lesions, non-adenoma in 2 lesions. The pathology match rate between local biopsy and EMR was 60.0%. The detection rates of cancer, HGD and MGD by EMR were higher than that by routine biopsy. No serious complications were seen in this study.</p><p><b>CONCLUSION</b>Endoscopic mucosal resection has significant impact on the endoscopic intervention treatment of early cancer and precancerous lesion in digestive tract.</p>