Olmos J, Soifer L, De Paula J A, San Román J, Varela E, Bustos Fernández L, Gadea O, De Paula A
Servicio de Gastroenterología del Hospital Italiano, Buenos Aires.
Acta Gastroenterol Latinoam. 1994;25(5):287-90.
This study was performed in 15 healthy control subjects (8 males- age 23-70 and 7 females age 20-74) as a way to compare the total and segmental colonic transit time with two different type of radiopaque markers. One type of markers was 3 mm cut sections of a radiopaque polietilene 14 French Levine tube, with a medium weight of 64.3 mg and a specific gravity (SG) of 1.28. The other type were 7 mm lenticular insoluble barium (lentils) with medium weight of 231 mg and a SG of 1.87. Each subject ingested 20 markers of each type with the breakfast and front and profile plain films of the abdomen were taken 24 and 48 hs after. The total colonic transit time for the polietilene markers was 17.7 hs and 27.3 hs for the barium type (BM) (p < 0.001). The segmental transit time for right colon was 2.4 hs (PM) and 9.7 hs (PM) and 9.7 hs (BM) (p < 0.001) in the left colon 9.5 hs (PM) and 11.3 hs (BM) and in rectoanun 5.9 hs (BM) with no statistical significance.
the physical characteristics of the radiopaque markers can modify the results of the colonic transit times.
本研究纳入了15名健康对照受试者（8名男性，年龄23 - 70岁；7名女性，年龄20 - 74岁），旨在比较两种不同类型的不透X线标记物的全结肠和节段性结肠运输时间。一种标记物是不透X线的聚乙烯14法式莱文管的3毫米切段，平均重量为64.3毫克，比重（SG）为1.28。另一种是7毫米扁豆状不溶性钡剂（扁豆），平均重量为231毫克，SG为1.87。每位受试者早餐时摄入每种类型的20个标记物，在摄入后24小时和48小时拍摄腹部正位和侧位平片。聚乙烯标记物的全结肠运输时间为17.7小时，钡剂类型（BM）为27.3小时（p < 0.001）。右半结肠的节段运输时间，聚乙烯标记物（PM）为2.4小时，钡剂标记物（BM）为9.7小时；左半结肠，聚乙烯标记物为9.5小时，钡剂标记物为11.3小时；直肠乙状结肠交界处，钡剂标记物为5.9小时，无统计学意义。
不透X线标记物的物理特性可改变结肠运输时间的结果。
