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The Effect of Blood Transfusion on Blood Flow to the Intestines of Premature Infants

This study has been completed.
Irene McLeneham Young Investigator Award through Magee Womens Research Institute
Information provided by:
University of Pittsburgh Identifier:
First received: September 9, 2005
Last updated: March 25, 2008
Last verified: March 2008
The purpose of the study is to see if a blood transfusion changes how fast blood flows to the intestines of a premature baby. Blood flow is measured by an ultrasound test. The investigators also look to see if the blood flow to the intestines depends on whether the baby feeds or doesn't feed during the blood transfusion.

Condition Intervention Phase
Anemia of Prematurity Procedure: feed during blood transfusion Procedure: nothing by mouth (NPO) during blood transfusion Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single Blind
Primary Purpose: Prevention
Official Title: The Effect of Packed Red Blood Cell Transfusion on Superior Mesenteric Artery Blood Flow Velocity in Premature Infants After Feeding

Resource links provided by NLM:

Further study details as provided by University of Pittsburgh:

Primary Outcome Measures:
  • Change in superior mesenteric artery blood flow velocity from pre-to-post feed in the anemic versus transfused state

Secondary Outcome Measures:
  • Effect of feeding versus NPO during transfusion on the change in superior mesenteric artery blood flow velocity from pre-to-post feed in the anemic versus transfused state

Estimated Enrollment: 80
Study Start Date: September 2005
Study Completion Date: November 2006
Detailed Description:

Currently a disparity exists among the NICU staff at Magee-Womens Hospital regarding whether premature infants should be fed during a blood transfusion. The effects of a blood transfusion on superior mesenteric artery blood flow velocity and the post-prandial hyperemia are not known.

We hypothesize that the post-prandial change in mesenteric blood flow velocity (BFV) will be the same before as after a packed red blood cell (PRBC) transfusion among anemic premature infants.

Sixty anemic infants (25-32 weeks GA, feeding >= 60 cc/kg/day) will undergo pre- and post-feed superior mesenteric artery Doppler studies both before and after a blood transfusion. Infants will be stratified by current weight into two groups (< 1250 grams and > 1250 grams). In each weight stratum the infants will be randomized to feeding or NPO during the PRBC transfusion. Randomization will be by block design, with block sizes ranging from two to six infants. The investigator performing the Doppler studies will remain masked to the feeding assignment of the infant.

The primary outcome for the study is the superior mesenteric artery blood flow velocity response to feeding between anemic and non-anemic states among premature infants. Our secondary outcome is the effect of feeding on BFV between anemic and non-anemic states in these infants. Statistical analysis will include paired and unpaired Student t-tests and regression analysis.


Ages Eligible for Study:   25 Weeks to 38 Weeks   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Singleton infants born at 25-32 weeks gestation who are < 38 weeks post-conceptual age at enrollment
  2. First infant of twin gestation born at 25-32 weeks gestation who requires a blood transfusion; if both infants require transfusion on the same day the larger infant will be enrolled.
  3. Receiving bolus enteral feeds [PO (bottle) and/or PE (feeding tube)] of at least 60 cc/kg/day
  4. A planned packed red blood cell transfusion, as per the clinical team, for anemia
  5. Infant is very likely to require a blood transfusion according to the attending neonatologist.

Exclusion Criteria:

  1. Known congenital anomalies of the heart, brain, kidneys or intestine
  2. Chromosomal abnormality
  3. Intrauterine growth restriction at < 3% for weight at birth since this has been shown to alter mesenteric BFV and the post-prandial hyperemia
  4. Twin to twin transfusion sequence
  5. Higher order multiples
  6. Patent ductus arteriosus known to be present or currently being treated
  7. History of definite necrotizing enterocolitis Bell Stage 2 or greater
  8. Concurrent treatments with antibiotics or steroids
  9. Feeding intolerance, defined as gastric aspirate > 30% of feed volume on 3 sequential feeds
  10. Concurrent enrollment in another randomized trial
  11. Infants discharged or transferred to another facility without having received a PRBC transfusion will be excluded post-hoc.
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Please refer to this study by its identifier: NCT00167388

United States, Pennsylvania
Magee-Womens Hospital
Pittsburgh, Pennsylvania, United States, 15213
Sponsors and Collaborators
University of Pittsburgh
Irene McLeneham Young Investigator Award through Magee Womens Research Institute
Principal Investigator: Gretchen Krimmel, MD Magee-Womens Hospital
  More Information Identifier: NCT00167388     History of Changes
Other Study ID Numbers: 0404184
Study First Received: September 9, 2005
Last Updated: March 25, 2008

Keywords provided by University of Pittsburgh:
blood flow velocity
superior mesenteric artery
intestinal blood flow in premature infants

Additional relevant MeSH terms:
Premature Birth
Obstetric Labor, Premature
Obstetric Labor Complications
Pregnancy Complications processed this record on June 23, 2017