In vitro expansion patterns of ameroid ring constrictors
In vitro expansion patterns of ameroid ring constrictors
复制标题
DOI：
10.2460/ajvr.69.11.1520
复制
发表时间：
2008-11-01
影响因子：
1
通讯作者：
Reimer, S. Brent
中科院分区：
文献类型：
--
作者：
Leshem, Steven S.;Lotsikas, Peter J.;Reimer, S. Brent
目的：评价和量化非晶态环缩窄器(Aeroid Ring Conductors，ARC)在体外有无不锈钢外环的大小随时间的变化。样本为12个圆弧(直径5.0 mm)，其中6个圆弧在不带不锈钢外环的犬血浆浴中浸泡34天(N组)，6个圆弧在有不锈钢外环的尖牙血浆浴中浸泡(R组)。在第0天，在最初的10天里每天都对弧线进行数字化成像，然后在第14天、第20天、第27天和第34天。测量每个时间点的内径、外径、管腔面积和高度。结果：在34天的时间里，两组支架的内径、外径和管腔面积有显著差异，B组支架的内径和管腔面积无明显变化，而N组支架的内径、外径、管腔面积和高度在研究过程中均有显著增加。结论和临床相关性-R组支架向心性肿胀不明显，而N组支架有明显的向心性膨胀。本研究结果表明，对于某些肝外门体分流的衰减和闭合，ARC的外环可能不是必需的。(Am J Vet Res 2008；69：1520-1524)
Objective-To evaluate and quantify in vitro dimensional changes of ameroid ring constrictors (ARCs) with and without the outer stainless steel ring in place over time.Sample Population-12 ARCs (5.0-mm diameter).Procedures-6 ARCs were immersed in canine plasma baths for 34 days without the stainless steel outer ring in place (group N), and 6 ARCs were immersed in canine plasma baths with the stainless steel outer ring in place (group R). The ARCs were digitally imaged at day 0, daily for the first 10 days, then on days 14, 20, 27, and 34. Inner diameter, outer diameter, luminal area, and height were measured for each time point. Volume and weight of rings were obtained at the start and completion of the study.Results-The inner diameter, outer diameter, and luminal area were significantly different between the 2 groups over the course of 34 days, The inner diameter and luminal area of the B-group constructs did not change significantly, while the inner diameter, outer diameter, luminal area, and height of N-group constructs all significantly increased over the course of the study.Conclusions and Clinical Relevance-R-group constructs had insignificant centripetal swelling without ring closure, whereas N-group constructs had significant generalized centrifugal expansion. Results of this study indicated that the outer stainless steel ring of an ARC may not be necessary for attenuation and closure of some single extrahepatic porto-systemic shunts. (Am J Vet Res 2008;69:1520-1524)