Villanueva-Meyer J, Swischuk L E, Cesani F, Ali S A, Briscoe E
Department of Radiology, University of Texas Medical Branch, Galveston 77555-0793, USA.
J Nucl Med. 1996 Aug;37(8):1356-8.
Gastroesophageal reflux and gastric emptying are usually assessed simultaneously with a 1-hr procedure. After ingestion of radiolabeled formula sequential images are gathered when the infant is in the supine position. This position is adequate for gastroesophageal reflux assessment, but delays gastric emptying.
We studied 48 children, 1 wk to 2 yr of age, who presented with vomiting or failure to thrive. They received 99mTc-sulphur colloid in formula. After completing 1 hr supine imaging we obtained additional abdominal views after changing the position of the infant to right lateral for 30 min, and upright for another 30 min.
The percent of gastric emptying at 60 min in the supine position was 35% +/- 19%. After 90 min, in the right lateral decubitus, the percent gastric emptying was 60% +/- 25%. At 120 min, after an upright period, the gastric emptying was 73% +/- 20%. In the supine position 19 of 48 patients showed significant emptying (defined as > 40% emptying). This increased to 41 of 48 normal studies considering the right lateral position and to 45 of 48 normal studies considering the infant upright position.
Many patients with delayed gastric emptying show significant emptying just by changing position. We routinely complement gastric emptying studies with delayed views in the right lateral and upright position.
胃食管反流和胃排空通常通过1小时的检查同时进行评估。摄入放射性标记配方奶后，当婴儿仰卧时采集序列图像。这个体位足以评估胃食管反流，但会延迟胃排空。
我们研究了48名年龄在1周龄至2岁之间、有呕吐或生长发育迟缓症状的儿童。他们在配方奶中摄入了99m锝-硫胶体。在完成1小时的仰卧位成像后，将婴儿体位改为右侧卧位30分钟，然后再改为直立位30分钟，之后获取额外的腹部图像。
仰卧位60分钟时胃排空百分比为35%±19%。90分钟后，右侧卧位时胃排空百分比为60%±25%。直立位120分钟后，胃排空率为73%±20%。仰卧位时，48例患者中有19例显示有明显排空（定义为排空>40%）。考虑右侧卧位时，48例正常检查中有41例显示明显排空；考虑婴儿直立位时，48例正常检查中有45例显示明显排空。
许多胃排空延迟的患者仅通过改变体位就显示有明显排空。我们常规通过右侧卧位和直立位的延迟图像来补充胃排空检查。
