测量通过绵羊十二指肠的消化物中干物质的流动速率。

Measurement of the rate of flow of dry matter in digesta passing through the duodenum of sheep.

Oldham J D, Ling J R

Br J Nutr. 1977 May;37(3):333-43. doi: 10.1079/bjn19770037.

Abstract

A total of seven sheep fitted with re-entrant cannulas in the proximal duodenum were used in three experiments to measure the passage of dry matter (DM) in duodenal digesta. 2. Fifty-three 24 h measurements and ten 48 h measurements of DM flow were made in Expt 1. Coefficient of variation (CV) of these measurements was 22-1% which was similar to variability reported for chromic oxide 'corrected' flows and for an estimate of day-to-day variation. DM flow on day 1 was 103-2% (SE = 8-94) of flow on day 2 in 48 h measurements. 3. In two 3 X 3 Latin-square design experiments, duodenal DM flow was measured continuously over 72 h and on days 1, 2 and 3 DM flow was 100-4, 102-6 and 96-9% (SE = 5-82) of mean flow (Expt 2) and 95-8, 101-2 and 103-0% (SE = 6-70) of mean flow (Expt 3) respectively. 4. It was concluded that no depression in duodenal DM flow occurred during the first 24 h of collection in these experiments and that the variability of repeated 24 h measurements of flow was within day-to-day variation.

摘要

在三项实验中，共使用了七只在十二指肠近端安装了再入式套管的绵羊，以测量十二指肠食糜中干物质（DM）的通过情况。2. 在实验1中，对DM流量进行了53次24小时测量和10次48小时测量。这些测量的变异系数（CV）为22.1%，与氧化铬“校正”流量以及每日变化估计值所报告的变异性相似。在48小时测量中，第1天的DM流量是第2天流量的103.2%（标准误=8.94）。3. 在两个3×3拉丁方设计实验中，连续72小时测量十二指肠DM流量，第1、2和3天的DM流量分别为平均流量的100.4%、102.6%和96.9%（标准误=5.82）（实验2）以及平均流量的95.8%、101.2%和103.0%（标准误=6.70）（实验3）。4. 得出的结论是，在这些实验中，收集的前24小时内十二指肠DM流量没有下降，并且重复的24小时流量测量的变异性在每日变化范围内。