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141.
142.
Flexible tantalum stents implanted in aortas and iliac arteries: effects in normal canines 总被引:2,自引:0,他引:2
Barth KH; Virmani R; Strecker EP; Savin MA; Lindisch D; Matsumoto AH; Teitelbaum GP 《Radiology》1990,175(1):91-96
Vascular endoprostheses made of knitted tantalum wire and expanded over angioplasty balloons were placed into aortas or iliac arteries of 14 normal dogs. Twelve stents were placed into the infrarenal abdominal aorta and two stents in the left common iliac arteries by the left carotid artery approach. To firmly expand the stent against the vascular wall, nominal stent sizes 0.5-1.0 mm larger than the measured arterial diameter were required. Arteriography performed at specified follow-up intervals showed no evidence of thrombi or emboli; all side branches (lumbar arteries) covered by the stents remained patent. Vascular diameter decreased minimally at 8 and 26 weeks, associated with histopathologic evidence of neointimal buildup. This buildup was highest at 8 weeks (mean, 313 microns) and was slightly less at 26 weeks (mean, 223 microns). Almost complete coverage by endothelium was seen as early as 3 weeks. It is concluded that the flexible tantalum wire stents are well tolerated by the arterial wall and become quickly endothelialized. No excessive neointimal buildup was observed during the 6-month study. 相似文献
143.
In six healthy volunteers, the size of the motor unit action potential (MUAP) was related to its contractile behaviour. Electrical activity was determined by measuring amplitude and area of the potential, using the macro electromyography (EMG) technique. The mechanical response was characterised by contraction time, twitch force and relaxation time, recorded with the spike triggered averaging technique. With increasing tension of the whole muscle corresponding to an increasing threshold, the force of single units enlarged exponentially compared to their EMG. There was only a weak relationship between contraction time and electrical activity and none between EMG and relaxation time. 相似文献
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146.
Vitamin D and Muscle Function 总被引:13,自引:2,他引:11
147.
Molecular mechanisms of insulin resistance and associated diseases 总被引:24,自引:0,他引:24
Mlinar B Marc J Janez A Pfeifer M 《Clinica chimica acta; international journal of clinical chemistry》2007,375(1-2):20-35
Insulin resistance is a state in which higher than normal concentrations of insulin are required for normal response. The most common underlying cause is central obesity, although primary insulin resistance in normal-weight individuals is also possible. Excess abdominal adipose tissue has been shown to release increased amounts of free fatty acids which directly affect insulin signalling, diminish glucose uptake in muscle, drive exaggerated triglyceride synthesis and induce gluconeogenesis in the liver. Other factors presumed to play the role in insulin resistance are tumour necrosis factor alpha, adiponectin, leptin, IL-6 and some other adipokines. Hyperinsulinaemia which accompanies insulin resistance may be implicated in the development of many pathological states, such as hypertension and hyperandrogenaemia. Insulin resistance underlies metabolic syndrome and is further associated with polycystic ovary syndrome and lipodystrophies. When beta-cells fail to secrete the excess insulin needed, diabetes mellitus type 2 emerges, which is, besides coronary heart disease, the main complication of insulin resistance and associated diseases. 相似文献
148.
Hyperkalemia secondary to hyporeninemic hypoaldosteronism with a normal glucocorticoid function was diagnosed in a 47-year-old man with moderate renal insufficiency. Mineralocorticoid administration corrected the hyperkalemia. A probable explanation for hyporeninemia and hypoaldosteronism in this syndrome is that the primary defect is an inability to release renin and the resultant angiotensin deficiency leads to an aldosterone deficiency. 相似文献
149.
Felix Aigner Friedrich Conrad Andreas Widschwendter Robert Zangerle Bettina Zelger Alfred Haidenberger Sebastian Roka Kurt Heim Reinhard Höpfl Martin Klimpfinger Yves Marcus Rigler Hugo Bonatti Johann Pfeifer Andrea Maier Reinhard Kirnbauer Andreas Salat 《Wiener klinische Wochenschrift》2008,120(19-20):631-641
150.
Michel Paul Johan Teuben Roy Spijkerman Taco Johan Blokhuis Roman Pfeifer Henrik Teuber Hans-Christoph Pape Luke Petrus Hendrikus Leenen 《Patient safety in surgery》2018,12(1):32