Assessment of passive respiratory compliance in healthy preterm infants: a critical evaluation.

Abstract:

:The airway occlusion techniques for assessing passive respiratory mechanics have become well established methods in fullterm neonates and older infants. The single breath technique (SBT) is frequently used for assessing lung function in intubated infants on neonatal intensive care units. However, less is known about the reliability of these quick and noninvasive techniques in healthy preterm infants. The aim of this study was to evaluate these methods in healthy unintubated preterm infants to facilitate both establishment of reference values and more meaningful interpretation of lung function assessments in the neonatal unit. Forty-seven studies were attempted in 31 healthy preterm infants (gestational age 29-36 weeks; body weight 1.88 +/- 0.28 kg; mean +/- SD) during the first 2 weeks of life, using both the multiple occlusion technique (MOT) and the SBT. Whereas technically acceptable respiratory system compliance (Crs) data from either the MOT or the SBT were obtained on 37 occasions in 25 infants, satisfactory results from both techniques were achieved only on 22 occasions. In these infants mean +/- SD Crs was 28.1 +/- 5.2 mL kPa-1 when assessed by MOT and 29.1 +/- 6.0 mL kPa-1 when using the SBT. The mean difference between technically satisfactory paired Crs values obtained with MOT and SBT was less than 5% (range, +28 to -18%). By contrast, in infants in whom data were invalidated as a result of expiratory airflow braking, failure to relax or instability of the end-expiratory level, gross discrepancies occurred between the techniques.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Pediatr Pulmonol

journal_title

Pediatric pulmonology

authors

Gappa M,Rabbette PS,Costeloe KL,Stocks J

doi

10.1002/ppul.1950150508

subject

Has Abstract

pub_date

1993-05-01 00:00:00

pages

304-11

issue

5

eissn

8755-6863

issn

1099-0496

journal_volume

15

pub_type

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