Document Detail

Vulnerability of respiratory control in healthy preterm infants placed supine.
MedLine Citation:
PMID:  7562287     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: We tested the hypothesis that healthy preterm infants have attenuated ventilatory responses to hypercapnia, associated with a decreased rib cage contribution to ventilation, in the supine versus prone position. STUDY DESIGN: We elicited hypercapnic ventilatory responses from 19 healthy preterm infants (postconceptional age 35 +/- 1 weeks) who were being prepared for hospital discharge. The O2 saturation was continuously monitored. Before and during CO2 rebreathing, ventilation was measured with a nasal mask pneumotachygraph and was derived from chest wall motion as determined by respiratory inductance plethysmograph. This measuring method allowed us to compare both ventilation and the percentage rib cage contribution to ventilation between supine and prone positions. Statistical analysis employed analysis of variance with repeated measures. RESULTS: The supine position was associated with a higher respiratory rate (p < 0.02) and lower O2 saturation (p < 0.007) than the prone position. The increase in ventilation in response to hypercapnia was lower in the supine than in the prone position. This was statistically significant for the respiratory inductance plethysmograph (p < 0.008) but not the pneumotachygraph (p = 0.077), and was associated with a smaller rib cage contribution to ventilation in the supine than in the prone position (p < 0.0001). CONCLUSION: Respiratory control may be vulnerable when healthy preterm infants are placed supine. Widespread avoidance of the prone position may not be appropriate for such patients.
R J Martin; J M DiFiore; C B Korenke; H Randal; M J Miller; L J Brooks
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The Journal of pediatrics     Volume:  127     ISSN:  0022-3476     ISO Abbreviation:  J. Pediatr.     Publication Date:  1995 Oct 
Date Detail:
Created Date:  1995-11-20     Completed Date:  1995-11-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0375410     Medline TA:  J Pediatr     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  609-14     Citation Subset:  AIM; IM    
Department of Pediatrics, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA.
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MeSH Terms
Carbon Dioxide / analysis
Hypercapnia / prevention & control*
Infant, Newborn
Infant, Premature*
Prone Position
Pulmonary Ventilation
Respiratory Function Tests
Sudden Infant Death / prevention & control
Supine Position*
Reg. No./Substance:
124-38-9/Carbon Dioxide
Comment In:
J Pediatr. 1996 Jun;128(6):865-6   [PMID:  8648555 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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