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Effect of rapid thoracic compression on the cerebral blood flow‐velocity patterns of small infants
Author(s) -
Maynard Roy,
Mammel Mark C.,
Holloman Keith K.,
Porter Sharon,
Boros Stephen J.
Publication year - 1992
Publication title -
pediatric pulmonology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.866
H-Index - 106
eISSN - 1099-0496
pISSN - 8755-6863
DOI - 10.1002/ppul.1950130411
Subject(s) - medicine , middle cerebral artery , cerebral blood flow , blood flow , anesthesia , transcranial doppler , diastole , cardiology , compression (physics) , cerebral arteries , flow velocity , ischemia , blood pressure , materials science , composite material , relaxation (psychology)
We measured the middle cerebral artery (MCA) flow‐velocities of 12 small infants (mean weight, 2,882 ± 602 g) before, during, and after the rapid thoracic compression (RTC) maneuvers of partial forced expiratory flow‐volume studies. Cerebral flow‐velocities were measured using transcranial Doppler ultrasonography. RTC increased MCA end diastolic flow‐velocities and Pourcelot indices of all infants ( P < 0.001). These values returned to baseline immediately after the release of chest compression. We also measured the MCA flow‐velocities of several preterm infants during their normal daily activities. The changes in flow‐velocity patterns observed during normal daily life were similar to those observed during RTC. These findings demonstrate that RTC produces real, but likely not pathologic, changes in cerebral blood flow‐velocities. © 1992 Wiley‐Liss, Inc.