New probe for the measurement of dynamic changes in the rectum
New probe for the measurement of dynamic changes in the rectum
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DOI：
10.1046/j.1365-2982.2003.00465.x
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发表时间：
2004-02-01
影响因子：
3.5
通讯作者：
Laurberg, S
中科院分区：
文献类型：
--
作者：
Andersen, IS;Gregersen, H;Laurberg, S
传统的双腔容积技术不能测量肠段内几个轴向位置处的周向尺寸变化。我们的目的是验证一种新的阻抗测面积探头，同时测量横截面积（CSA）在5个轴向位置在体外和体内在10只麻醉猪。在已知直径的圆柱形管中，通过探头测量的CSA的日间变异系数（CV）为0.8- 9.5%。与实际直径的平均偏差范围为2.3%至6.7%。在锥形管中，日间CV为2.3-8%，平均百分比偏差为-2.8至1.0。插入变窄切片导致总CV为7- 13%。体内研究揭示了CSA的变化，与排气有关。它的结论是，阻抗平面法允许同时测量CSA在直肠内的几个层次。体外有效性是可接受的，并且在体内确定了管腔直径的变化。
Conventional mano-volumetric techniques cannot measure changes in circumferential dimensions at several axial positions within a bowel segment. Our aims were to validate a new impedance planimetry probe for simultaneously measuring the cross-sectional area (CSA) at five axial positions in vitro and in vivo in 10 anesthetized pigs. The day-to-day coefficient of variation (CV) for CSA measured by the probe in cylindrical tubes of known diameter was 0.8-9.5%. The mean from actual diameter deviation ranged from 2.3 to 6.7%. In a conical tube the day-to-day CV was 2.3-8% and mean percentage deviation -2.8 to 1.0. Interposed narrowing sections caused a total CV of 7-13%. In vivo studies revealed variations in CSA, associated with expulsion of flatus. It is concluded that impedance planimetry allows simultaneous measurement of CSA at several levels within the rectum. In vitro validity was acceptable and alterations in lumen diameter were identified in vivo.