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[Computed tomography in pulmonary evaluation of children with acyanotic congenital heart defect and pulmonary hyperflow].

Abstract：

BACKGROUND AND OBJECTIVES:Respiratory dysfunction is common in children with acyanotic congenital heart defects (ACHD) with pulmonary hyperflow; however, little is known about the pulmonary structure of those patients. The objective of this study was to quantify the volumes of air and tissue, as well as the distribution of pulmonary aeration in this population. METHODS:After approval by the Ethics Committee of the institution and signing of an informed consent, seven children with ACHD with pulmonary hyperflow underwent computed tomographies of the chest. All images included the left and right pulmonary contour, and pulmonary volumes and weight were calculated using volumetric data. Paired Student t test was used to compare left and right, and exponential regression was used for correlations. RESULTS:Patients had a mean age of 20 months and weight of 9.9 kg. Total pulmonary volume (TPV) was 66.7 +/- 23.1 mL.kg-1, tissue volume of 33.5 +/- 15.7 mL.kg-1, and air volume of 33.1 +/- 8.3 mL.kg-1. The right lung represented 57.9% of TPV and the left, 42.1% (p < 0.001). The pulmonary volume of air on the right was 60.5% of the total air volume (p < 0.001), and the volume of pulmonary parenchyma normally aerated was significantly lower on the left (27.6 +/- 6.8 vs . 18.1 +/- 8%, p < 0.001). CONCLUSIONS:The volume of lung tissue was greater than expected in children with ACHD with pulmonary hyperflow, possibly due to interstitial edema. Pulmonary aeration is reduced in the left lung due to the compression of the lung by the heart.

journal_name

Rev Bras Anestesiol

journal_title

Revista brasileira de anestesiologia

authors

Gimenez S,Teixeira ML,Myashiro R,Carmona MJ,Auler JO Jr,Malbouisson LM

doi

10.1016/s0034-7094(09)70079-0

subject

Has Abstract

pub_date

2009-09-01 00:00:00

pages

545-57

issue

5

eissn

0034-7094

issn

1806-907X

pii

S0034-70942009000500003

journal_volume

59

pub_type

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