共查询到20条相似文献,搜索用时 15 毫秒
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Castell L 《Sports medicine (Auckland, N.Z.)》2003,33(5):323-345
In situations of stress, such as clinical trauma, starvation or prolonged, strenuous exercise, the concentration of glutamine in the blood is decreased, often substantially. In endurance athletes this decrease occurs concomitantly with relatively transient immunodepression. Glutamine is used as a fuel by some cells of the immune system. Provision of glutamine or a glutamine precursor, such as branched chain amino acids, has been seen to have a beneficial effect on gut function, on morbidity and mortality, and on some aspects of immune cell function in clinical studies. It has also been seen to decrease the self-reported incidence of illness in endurance athletes. So far, there is no firm evidence as to precisely which aspect of the immune system is affected by glutamine feeding during the transient immunodepression that occurs after prolonged, strenuous exercise. However, there is increasing evidence that neutrophils may be implicated. Other aspects of glutamine and glutamine supplementation are also addressed. 相似文献
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K H Taber P J Migliore J J Pagani J J Ford T McLauren L A Hayman 《Investigative radiology》1990,25(3):240-244
The rates at which the paramagnetic compounds deoxyhemoglobin (Hb) and methemoglobin (MHb) form in vivo within an area of hemorrhage are unknown. The present experiment establishes the baseline concentrations and rates of change in paramagnetic hemoglobin concentrations, as well as the pH in normal heparinized and clotted human blood maintained in vitro at 37 degrees C under anaerobic conditions over 30 hours. There was a moderate increase in Hb concentration in normal heparinized blood (average increase was 15.5%, rate = 0.50%/hour) and a slight increase in MHb concentration in the heparinized blood and clots (average increase was 1.4%, rate = 0.044%/hour). A second experiment was done to verify the activity of the RBC systems responsible for maintaining the hemoglobin molecule in the reduced state. Conversion of MHb to Hb in these samples proceeded at a rate of 5.6%/hour. In a third experiment, blood from 11 normal subjects maintained at 4 degrees C 25 degrees C was analyzed for MHb concentration over the course of 28 days. The level of MHb formation remained in the range of normal for at least 11 days in all subjects. The authors conclude that at basal conditions created in vitro, the blood levels of both Hb and MHb remain at relatively low levels. Therefore, if the accumulation of Hb and/or MHb occurs in acute in vivo hematomas it must be driven by intrinsic tissue factors. 相似文献
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M Radojkovi? S Ili? 《Vojnosanitetski pregled. Military-medical and pharmaceutical review》1992,49(5):493-497
The pathohistologic analysis of testis sections of 37 postpuberty patients with different types of cryptorchism is performed. The tissue samples were taken during orchiopehy, fixed in Bouin's solution and treated by the standard histologic techniques. The morphologic criteria are presented for identification of the presence of the so called carcinoma in situ cells found in two cases. Besides, in 13 patients rare, mainly single, atypical germinative cells were found in a smaller number of the seminiferous tubules. It has been concluded that the presence of carcinoma in situ cells in undescended testes of some patients and considering the simple way of sampling, lack of complications and high reliability of the diagnostic procedure, it is absolutely justified to take routine biopsy of testes during orchiopexy in each postpuberty and perhaps prepuberty patient. 相似文献
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我国医用辐射防护研究概况 总被引:8,自引:0,他引:8
张景源 《中华放射医学与防护杂志》1998,18(5):305-309
医学放射学技术的迅速发展及介入放射学在临床广泛应用,使更多的人受到电离辐射的照射,同时也促进了医疗照射防护工作的发展。文中重点综述了我国医用辐射防护工作者近年来在X射线CT的医疗照射防护、对介入放射学工作者的剂量监测以及应用医疗照射防护体系,降低医疗照射剂量等方面所作出的成绩和研究进展 相似文献
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新时期军医学院人才培养的思考 总被引:1,自引:0,他引:1
在新的历史条件下 ,军医学院迎接未来高技术局部战争的挑战 ,适应部队武器装备的不断更新以及医学科技、社会发展对人才素质提出的新要求 ,必须在更为广阔的时空背景下找准人才培养的着眼点 ,科学确立人才培养方向 ,提高人才培养质量。现就人才培养思考如下 :1 改变教育观念 , 相似文献
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P Gavarry 《Schweizerische Zeitschrift für Sportmedizin》1989,37(2):77-9; discussion 99-102
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成批煤气爆燃烧伤的救治体会 总被引:1,自引:0,他引:1
张骏 《中国烧伤创疡杂志》1998,(3):17-18
报道治疗因煤气泄漏爆炸烧伤病员7例,经应用MEBT技术积极救治,其中6例于伤后17天痊愈出院,另一例特重伤员也于伤后30天康复出院。作者认为:应严格按照MEBT/MEBO要求进行规范治疗,正确处理生命体征、休克、感染、脏器功能和创面的辨证关系。同时,不能忽视外科营养在过程中的重要作用,它是创面修复的物质保证。 相似文献
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Certification in nuclear cardiology in Europe 总被引:1,自引:1,他引:0
Bengel FM 《European journal of nuclear medicine and molecular imaging》2005,32(2):141-142
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Diagnostic imaging of pediatric urologic disorders is continuously changing as technologic advances are made. Although the backbone of pediatric urologic imaging has been ultrasound, voiding cystourethrography, and radionuclide scintigraphy, newer and advanced modalities are becoming increasingly important. This article discusses the techniques and clinical applications of three such imaging modalities as they pertain to pediatric urologic disorders: (1) MR urography; (2) advanced ultrasound (harmonic imaging, three-dimensional, and voiding urosonography); and (3) CT angiography. 相似文献
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Angiography in gastrointestinal bleeding in children 总被引:1,自引:0,他引:1
Twenty-seven children aged 1 day to 16 years studied arteriographically for acute or chronic gastrointestinal bleeding were reviewed. Children with known esophageal varices and portal hypertension were excluded. Final diagnoses were made in 25 patients by means of surgery, endoscopy, biopsy, laboratory data, and clinical follow-up. Of these 25 cases, arteriography gave a correct diagnosis in 64% and was falsely negative in 36%. In acute gastrointestinal bleeding, arteriographic diagnosis was correct in 71% and falsely negative in 29%. In chronic or recurrent gastrointestinal bleeding, arteriographic diagnosis was correct in 55% and falsely negative in 45%. The common causes of bleeding in this study were gastric and duodenal ulcers, gastritis, vascular malformations, and typhlitis. Transcatheter therapy was attempted in six acute bleeders, with success in three (50%). 相似文献
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Cinzia Orazi Stefano Picca Paolo M. S. Schingo Fausto M. Fassari Giuseppe Canepa 《Skeletal radiology》2009,38(4):387-391
Primary hyperoxaluria (PH1) is a rare inborn autosomal recessive metabolic disorder due to the deficiency of hepatic alanine-glyoxylate-aminotransferase.
This deficiency results in excessive synthesis and urinary excretion of oxalate, inducing renal stone formation and deposition
of calcium oxalate in the kidney, bone, myocardium, and vessels (systemic oxalosis, SO) in the most severely affected individuals.
We report renal and skeletal changes in a 3-month-old girl with PH1 and SO. Intense cortico-medullary hyperechogenicity and
increased homogeneous radiopacity of normal-sized kidneys suggested the diagnosis of SO. Skeletal survey showed osteopenia
and characteristic symmetrical metaphyseal transverse bands in long bones, progressively becoming more dense and migrating
towards the diaphysis. Multiple pathological and slowly healing fractures of the limbs occurred at the dense band level. A
radiopaque rim was then observed in flat bones, epiphyseal nuclei, and vertebral bodies. Inflammatory granulomatous reaction,
induced by the presence of oxalate crystals in the marrow spaces, coexisted with progressively evident radiological signs
of secondary hyperparathyroidism, with partially overlapping features. The patient was treated by peritoneal dialysis and
hemodialysis until combined liver–kidney transplantation. There are no previous reports of infants treated with hemodialysis
for more than 2 years. 相似文献
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The fatty liver infiltrations of the children are not uncommon and are often seen in particular diseases, mainly related to intoxication or metabolic diseases. The authors reported a case of heterogeneous fatty liver infiltration due to obesity with a good evolution after a hypocaloric diet. 相似文献
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