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排序方式: 共有282条查询结果,搜索用时 15 毫秒
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TERRY L. FOSTER Ph.D. LUTHER WINANS JR. M.S. THEODORE R. CARSKI M.D. † 《The American journal of gastroenterology》1980,73(3):238-243
A commercially available lactobacillus-containing preparation has been used extensively in the treatment of diarrhea but few laboratory tests have been performed to determine the efficacy of this product. The rabbit ileal loop reaction was used here to determine the effect of the lactobacillus preparation and its ingredients on E. coli enterotoxin-induced loop fluid response. Enterotoxigenic E. coli cells grown overnight in shake cultures were washed and resuspended in saline to the original volume. They were then diluted in TSB suspensions of the lactobacillus preparation or its ingredients and injected into ileal loops. E. coli diluted in TSB served as positive controls. Fluid response was measured after 18 hours and the loop fluid ratio (LFR) (ml./cm.) of the lactobacillus preparations was compared to the positive controls. The positive controls always showed a high loop fluid ratio (> 1.1 ml./cm.) and negative saline controls showed no fluid response. The lactobacillus granules and tablets had low LFR's (0.08 and 0.05, respectively). Ingredients (whey, talc, sugar, evaporated milk, mineral oil) had variable LFR's (0.65, 0.78, 1.39, 1.46 and 1.54, respectively). Individual ingredients used to make this preparation show little antifluid response when used separately but the final product exhibits a significant antienterotoxin response. 相似文献
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S. ADAM STRICKBERGER PETER R. FOSTER † PAUL J. WANG ‡ KAORU OKISHIGE PETER L. FRIEDMAN 《Pacing and clinical electrophysiology : PACE》1993,16(10):1984-1993
The effects of selective infusion of 25% ethanoi into the AV nodal artery was assessed in 1J putients with atriai fibrillation and uncontrollabiy rapid ventricular response rates. The primary study objective was to achieve permaneni modificafion of AV nodal function and control ventricular rate without drug therapy and mthout causing permanent complete AV block. "Clinical success" was defined as drug-free rate control by either AV nodal modification or the production of complete AV block. Selective catheterization and ethanol infusion into the AV nodal artery could be performed in nine patients. Jntracoronary ethanol infusion acutely caused second- or third-degree AV noda] block in seven palients and an increase in AV nodal refractory period and Wenckebach cycle length in two patients. Acute occlusion of the AV nodal artery or infarction of nontarget myocardium was not observed. During follow-up of 22.2 ± 2.2 months the primary study objective was attained in only four of nine patienfs treated, yielding an efficacy of 44%. However, the "clinical success" rate was 78%. The acute effects of ethanol on AV conduclion did not predict the chronic effects. Selective intracoronary infusion of dilute ethanol lo control the ventricular rate in atrial fibrillation should be considered when rodiofrequency ablation has been unsuccessful. This method of chemical ablation is as effective and probably safer than rapid administration of 96% ethanol. 相似文献
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STEVEN C. ABLER ARTHUR J. FOSTER RICHARD S. SANDERS EVANS WUU 《Pacing and clinical electrophysiology : PACE》1992,15(11):1986-1990
A new type of bipolar lead has been designed to be thinner and more reliable than the standard coaxial design. The new lead has passed numerous bench tests to ensure its reliability. Improved fatigue performance was shown during comparisons between the new type of coil (bifilar DFT [drawn filled tube]) and previous standard coils (trifilar MP35N). During the initial animal studies no reliability concerns were raised and stable electrode thresholds were measured. If success in the test process of this lead continues, a bipolar lead may soon be marketed with a size and reliability comparable to unipolar leads. 相似文献
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A simple, compact and lightweight device for coupling activescavenging systems to shrouded breathing system valves is described.Provided a scavenging minute flow rate greater than the expiredgas volume is available, the unit can handle automatically changesin both variables. Optimal function is achieved with scavengingflows from about twice the discharged gas flow to about 50 litremm1 At these flows the valve can accommodate the outflowof gas-driven ventilators where driving gas and circuit gasare discharged through the same port There is no interferencewith expiratory valve function in the event of scavenging failure 相似文献
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C. S. FOSTER 《Histopathology》1980,4(5):567-577
Five cases of mucus-secreting 'alveolar cell carcinoma' are described, two of primary pulmonary origin and three metastatic from breast or pancreas. Mucin histochemistry demonstrated qualitative and quantitative differences between the mucopolysaccharides produced by these two groups of tumours. Hyaluronic acid production was restricted to the primary lung tumours. Greater quantities of acid sulphomucins were found in the two tumours arising in the lung and more neutral mucins in the three tumours metastatic from extra pulmonary primaries. It is proposed that mucus-secreting alveolar cell carcinomas represent an unusual, and saprophytic relationship between the metastatic cells of well-differentiated adenocarcinomas and the lung. As the malignancy of the tumour cells increases, so the ability to produce specific mucins decreases and, simultaneously, the tumours cease to maintain their alveolar pattern. 相似文献
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D. R. FOSTER D.M.R.D. F.R.C.R. D. C. CAMERON M.R.C.P. F.R.C.R. M.R.A.Cit. 《Journal of Medical Imaging and Radiation Oncology》1982,26(2):161-164
Cystic adventitial disease of the popliteal artery should be remembered when a young patient presents with intermittent claudication and no evidence of atherosclerosis elsewhere. The use of arteriography may distinguish the condition from embolisation, atheroma or popliteal entrapment syndrome, unless complete occlusion of the vessel has occurred. Surgical treatment in the form of cyst evacuation or arterial resection with vein grafting provides good results. 相似文献