Morphometry of hypoplastic fetal guinea pig lungs following amniotic fluid leak

Details

Serval ID
serval:BIB_183A43B4C802
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Morphometry of hypoplastic fetal guinea pig lungs following amniotic fluid leak
Journal
Pediatric Research
Author(s)
Collins  M. H., Moessinger  A. C., Kleinerman  J., James  L. S., Blanc  W. A.
ISSN
0031-3998 (Print)
Publication state
Published
Issued date
10/1986
Volume
20
Number
10
Pages
955-60
Notes
Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S. --- Old month value: Oct
Abstract
Deficient quantity of amniotic fluid causes fetal guinea pig lung hypoplasia. Oligohydramnios that lasts only 5 days in early gestation is sufficient to reduce fetal lung growth significantly. We quantitated lung structural alterations at 50 days gestation (term is 67 days) of fetal guinea pigs whose amniotic fluid was drained on day 45 gestation. The study period spans the late canalicular-early saccular phases of guinea pig lung growth. Compared to littermate controls (n = 4), experimental fetuses (n = 5) have reduced lung:body weight ratio (2.81 +/- 0.16 versus 3.21 +/- 0.20 X 10(-2), p less than 0.01), indicating lung hypoplasia. Lung volume is significantly decreased in the experimental fetuses (1.17 +/- 0.15 versus 1.34 +/- 0.07 ml, p less than 0.05). The proportion of lung containing parenchyma (i.e. developing alveoli and alveolar ducts) is reduced following oligohydramnios (0.83 +/- 0.04 versus 0.90 +/- 0.02, p less than 0.025). The hypoplastic lungs contain fewer saccules (fetal "alveoli") (46 +/- 20 versus 69 +/- 23 X 10(6), p less than 0.1) and the surface area that would be available for gas exchange is decreased (698 +/- 234 versus 974 +/- 80 cm2, p less than 0.05). Lung volume and volume proportion of parenchyma are reduced in the experimental lung and therefore diminished parenchymal elastic tissue is anticipated. However, the total length of parenchymal elastic tissue in the experimental lungs is decreased to a surprising degree and is little more than half the length in control lungs (504 +/- 222 versus 974 +/- 70 m, p less than 0.0025). Such marked reduction in total length suggests that factors other than smaller lung size have contributed to the decrease of elastic tissue in the experimental group. In fact, elastic tissue length per unit volume is significantly reduced (509 +/- 189 versus 809 +/- 115 m/cm3, p less than 0.025) indicating an absolute decrease in parenchymal elastic tissue in the hypoplastic lungs.(ABSTRACT TRUNCATED AT 250 WORDS)
Keywords
*Amniotic Fluid Animals Body Weight Elastic Tissue/pathology Female Fetus/*physiology Gestational Age Guinea Pigs Lung/growth & development/*pathology Lung Volume Measurements Organ Size Pregnancy Pulmonary Alveoli/pathology Time Factors
Pubmed
Web of science
Create date
25/01/2008 13:16
Last modification date
20/08/2019 12:48
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