Document Detail

Cardiopulmonary changes in the crying neonate.
MedLine Citation:
PMID:  481964     Owner:  NLM     Status:  MEDLINE    
To determine hemodynamic effects of crying, 12 newborn infants recovering from the respiratory distress syndrome (RDS) were studied. When crying, the range of inspiratory esophageal pressure was -18.8 to -32.5 cm H2O and the range of espiratory pressure was +6.2 to 34.4 cm H2O. The esophageal pressure remained positive for a mean value of 66% of the respiratory cycle. There was a mean significant increase in heart rate of 19 beats/min. The systolic and diastolic blood pressures increased significantly at the beginning of strain to 115 and 135% of the respective control values. There was a progressive decrease in systolic and diastolic pressures during the period of strain and the systolic pressures reached values significantly less than control. With the decrease in systolic and diastolic pressures, there were pronounced reductions in pulse pressures. Three infants reached pulse pressure values less than 1% of control when cries were sustained for nine cardiac cycles. There was a significant mean decrease in arterial oxygen tension (PaO2) of 16.8 mm Hg. There were no changes in arterial carbon dioxide tension (PaCO2), pH, or base excess.
R Dinwiddie; R Pitcher-Wilmott; J G Schwartz; T H Shaffer; W W Fox
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Pediatric research     Volume:  13     ISSN:  0031-3998     ISO Abbreviation:  Pediatr. Res.     Publication Date:  1979 Aug 
Date Detail:
Created Date:  1979-11-21     Completed Date:  1979-11-21     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0100714     Medline TA:  Pediatr Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  900-3     Citation Subset:  IM    
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MeSH Terms
Blood Pressure
Esophagus / physiology
Heart Rate
Infant, Newborn*
Respiratory Distress Syndrome, Newborn / physiopathology*

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