PEDIATRICS Vol. 43 No. 1 January 1969, pp. 96-102
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Suck and Swallow in the Premature Infant

Joyce D. Gryboski M.D.1

1 Department of Pediatrics Yale University School of Medicine 333 Cedar Street New Haven, Connecticut

The determination of suck-swallow patterns and esophageal motility were performed on 40 premature infants between 1,700 and 2,500 gm birth weight. After initial mouthing, two types of suck-swallow patterns were noted. The first, "the immature suck-swallow pattern" consisted of a rate of 1 to 1.5 sucks per minute and consisted of short sucking bursts preceded or followed by swallows. The second, "the mature suck-swallow pattern" was characterized by bursts of over 30 sucks, and a rate of 2 per second. Swallows occurred frequently during sucking bursts. The smallest premature infants had poor penistalsis in the body of the esophagus and did not attain a "mature suck-swallow pattern" until after peristalsis had become propagative. It is postulated that the "immature suck-swallow pattern" prevents the delivery of a large amount of fluid which could not be handled by an esophagus which has not yet developed the ability for adequate peristalsis.




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