Methods: 24 premature infants were chosen and kept in the supine or pron e positions.Fluid retention volume in the stomach was recorded and compared statistically.

• 方法：对24例早产儿进行自身不同卧位比较，分别于喂养后取仰卧位和俯卧位，记录胃内潴留液量、胃食管反流发生次数、合并呼吸暂停次数。