Skip to Main Content




The enteral route is the most physiologic and natural way of administering nutrients to humans, and attaining full enteral feedings can often be challenging to clinicians who care for preterm infants. Establishing enteral feedings should be one of the most important goals, especially in very low birth weight (VLBW) infants. The utilization of the gastrointestinal tract provides these patients with multiple benefits, which include enhanced growth and neurodevelopment, improved immunologic functions with decreased infections, and acceleration of intestinal adaptation and maturation with a subsequent increase in the absorption of nutrients. Despite the numerous advances made to date in the area of nutrition for preterm infants, such as the use of parenteral solutions with more proteins, the majority of these infants are discharged weighing less than the 10th percentile for age.1,2 The early initiation of parenteral nutritional support in preterm infants is a trend now widely supported by neonatologists, but often, enteral nutrition is underutilized, delayed, or totally withheld for prolonged times because of concerns of feeding intolerance or the fear for the development of necrotizing enterocolitis (NEC), which remains the most common devastating gastrointestinal complication of the preterm infant. The principles that should be considered to prevent “metabolic shock” and to optimize nutrition in the preterm infant should include the following:


  1. Clinicians should be aware that metabolic and nutritional requirements do not stop with birth.

  2. That hours, not days, are the longest periods this group of infants should be allowed to face without receiving either enteral or parenteral nutrition (PN).

  3. That the metabolic and nutritional requirements of the newborn are equal to or greater than those of the fetus.


In this chapter, we review characteristics of the developing intestine as they relate to enteral nutritional strategies for the preterm infant.


The Developing Intestine


The intestine not only serves as a nutrient digestive absorptive organ but also is one of the largest immune organs of the body and serves a significant endocrine and exocrine role in humans. The intestine has neural tissue in amounts equivalent to that of the entire spinal cord. As the fetal intestine develops, the increase in its total surface area is significant, largely because of the villus and microvillus growth during this period of development.


In many neonatal intensive care units (NICUs), because of concerns of feeding intolerance and NEC, the gastrointestinal tract of the critically ill, low birth weight infant either is not exposed to nutrients at all for prolonged periods after birth or is provided only “minimal enteral nutrition,” and most nutrients are only provided parenterally. The PN solutions are lifesaving nutritional medical interventions in the preterm infant, but ideally, the approach should be to provide most of the nutrients via the enteral route as soon as safely possible to promote intestinal growth and normal physiology. As illustrated in Figure 11-1, the lack or absence of luminal ...

Want remote access to your institution's subscription?

Sign in to your MyAccess profile while you are actively authenticated on this site via your institution (you will be able to verify this by looking at the top right corner of the screen - if you see your institution's name, you are authenticated). Once logged in to your MyAccess profile, you will be able to access your institution's subscription for 90 days from any location. You must be logged in while authenticated at least once every 90 days to maintain this remote access.


Create a Free MyAccess Profile

* Required Fields

Note: If you have registered for a MyAccess profile on any of the Access sites, you can use the same MyAccess login credentials across all sites.

Passwords must be between 6 and 40 characters long (no whitespace), cannot contain characters #, &, and must contain:
  • at least one lowercase letter
  • at least one uppercase letter
  • at least one digit

Benefits of a MyAccess Profile:

  • Remote access to the site off-campus on any device
  • Notification of new content via custom alerts
  • Bookmark your favorite content such as chapters, figures, tables, videos, cases and more
  • Save and download images to PowerPoint
  • Self-Assessment quizzes saved for quick review
  • Custom Curriculum access for both instructors and learners

Subscription Options

AccessPediatrics Full Site: One-Year Subscription

Connect to the full suite of AccessPediatrics content and resources including 20+ textbooks such as Rudolph’s Pediatrics and The Pediatric Practice series, high-quality procedural videos, images, and animations, interactive board review, an integrated pediatric drug database, and more.

$595 USD
Buy Now

Pay Per View: Timed Access to all of AccessPediatrics

24 Hour Subscription $34.95

Buy Now

48 Hour Subscription $54.95

Buy Now

Pop-up div Successfully Displayed

This div only appears when the trigger link is hovered over. Otherwise it is hidden from view.