Zambuto D, Bramson R T, Blickman J G
Department of Radiology, Massachusetts General Hospital, Boston, 02114, USA.
Radiology. 1995 Jul;196(1):55-8. doi: 10.1148/radiology.196.1.7784589.
To prospectively evaluate intraluminal pressure changes in the colon of children undergoing conventional hydrostatic (barium and water-soluble contrast material) and air contrast barium enema studies.
Dynamic intracolonic pressure was measured in 26 children undergoing hydrostatic barium (23% wt/vol) enema studies, air contrast barium enema studies, or water-soluble contrast material enema examinations. Measurements were obtained with a measuring device capable of recording rapid changes in pressure. Pressure measurements were obtained with the contrast reservoir system open (contrast material was free to run through the tubing into the patient's colon) and closed (tube was clamped).
The colonic pressures during the filling phase with liquid contrast material were equal to those elsewhere at the same level with the hydrostatic system. Mean pressure ranged from 30 to 50 mm Hg with peaks of more than 100 mm Hg during Valsalva maneuvers. During air contrast barium enema studies, sharp pressure increases and rapid swings in the intracolonic pressure occurred during and after manual insufflation of air.
During conventional hydrostatic barium enema studies, intracolonic pressures remain low. During air insufflation, there were intermittent high, sharp pressure peaks.
前瞻性评估接受传统水压灌肠（钡剂和水溶性对比剂）及气钡双重造影灌肠检查的儿童结肠内压力变化。
对26例接受水压钡剂（23%重量/体积）灌肠检查、气钡双重造影灌肠检查或水溶性对比剂灌肠检查的儿童进行结肠内动态压力测量。使用能够记录压力快速变化的测量装置进行测量。在对比剂储存系统开放（对比剂可自由通过管道流入患者结肠）和关闭（管道夹闭）两种状态下进行压力测量。
使用水压系统时，液体对比剂充盈期的结肠压力与同一水平的其他部位相等。平均压力范围为30至50毫米汞柱，瓦尔萨尔瓦动作期间峰值超过100毫米汞柱。在气钡双重造影灌肠检查期间，手动注入空气时及之后，结肠内压力出现急剧升高和快速波动。
在传统水压钡剂灌肠检查期间，结肠内压力保持较低。在注入空气期间，会出现间歇性的高尖压力峰值。
