Document Detail

PULMONARY HYPERTENSION IN RATS LIVING UNDER COMPRESSED AIR CONDITIONS.
Jump to Full Text
MedLine Citation:
PMID:  19870239     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
1. Pulmonary arterial hypertension was demonstrated in a series of rats that had been kept for 24-31 days in an environment of compressed air, having a barometric pressure of 3040 mm. Hg. The partial pressure of oxygen was 635 mm. Hg, which is equivalent to an 83.6 per cent oxygen mixture at normal barometric pressure. 2. Sclerosing changes in the pulmonary arterioles have been observed which precede the development of demonstrable hypertension in the pulmonary circulation. These vessels showed histological changes that were indicative of injury after 3 days of exposure. There was a thickening of the walls which stained more intensely with eosin, as well as marked perivascular edema and often a narrowing of the lumina. Progressive thickening, narrowing, and hyalinization of the pulmonary arterioles occurred later, after the disappearance of perivascular edema. These changes appeared very similar to the renal arterial lesions seen at autopsy in patients dying from malignant hypertension. 3. Pathological examination did not reveal significant or constant changes from normal in any organs except the lungs and heart. The blood vessels of the systemic circulation showed no pathological change. 4. The walls of the large pulmonary arteries increased in thickness rapidly after the 3rd day of exposure. This change was due to the progressive formation and condensation of fibrous tissue outside of the media and to a lesser extent to thickening of the alternate layers of elastic tissue and smooth muscle in the arterial wall. 5. Marked dilatation of the right ventricle and conus arteriosus as well as small areas of scar tissue formation in the right ventricle were present on prolonged exposure. A few hearts showed larger areas of fibrosis that were visible on macroscopic examination. 6. The systemic arterial blood pressure of a small series of rats exposed to compressed air for 38 days and examined 7 to 10 days after decompression was in each instance less than one-half the average normal pressure. 7. The findings in this study are consistent with the clinical and pathological signs of pulmonary hypertension in man. 8. The anatomical alterations observed in the alveolar units of the lungs were essentially the same as those previously described (1). 9. A method has been devised whereby pulmonary arterial hypertension, accompanied by important sclerotic changes in the arteries of the pulmonary circulation can be induced for investigation.
Authors:
G A Bennett; F J Smith
Related Documents :
15824199 - Pulmonary hypertension in a gtp-cyclohydrolase 1-deficient mouse.
1729029 - Longitudinal distribution of pulmonary vascular resistance after endotoxin administrati...
8658379 - Doppler assessment of pulmonary haemodynamics in chronic hypoxic lung disease.
16791109 - Effects of levosimendan on right ventricular afterload in patients with acute respirato...
7497169 - Pulmonary microvascular pressure profile during development of hydrostatic edema.
16159089 - Reduction of pulmonary edema after sah with a pulmonary artery catheter-guided hemodyna...
10564139 - Inhaled nitric oxide inhibits nos activity in lambs: potential mechanism for rebound pu...
2495339 - Changes in cranial csf volume during hypercapnia and hypocapnia.
8732989 - Laplace's law and the risks and prevention of bladder rupture after enterocystoplasty a...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of experimental medicine     Volume:  59     ISSN:  0022-1007     ISO Abbreviation:  J. Exp. Med.     Publication Date:  1934 Jan 
Date Detail:
Created Date:  2010-06-22     Completed Date:  2010-06-22     Revised Date:  2010-09-28    
Medline Journal Info:
Nlm Unique ID:  2985109R     Medline TA:  J Exp Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  181-93     Citation Subset:  -    
Affiliation:
Department of Pathology, Harvard Medical School, and the Department of Physiology, Harvard School of Public Health, Boston.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Full Text
Journal Information
Journal ID (nlm-ta): J Exp Med
ISSN: 0022-1007
ISSN: 1540-9538
Publisher: The Rockefeller University Press
Article Information
Download PDF
Copyright © Copyright, 1934, by The Rockefeller Institute for Medical Research New York
Received Day: 7 Month: 11 Year: 1933
Print publication date: Day: 31 Month: 1 Year: 1934
Volume: 59 Issue: 2
First Page: 181 Last Page: 193
ID: 2132349
PubMed Id: 19870239

PULMONARY HYPERTENSION IN RATS LIVING UNDER COMPRESSED AIR CONDITIONS
Granville A. Bennett
F. J. C. Smith
From the Department of Pathology, Harvard Medical School, and the Department of Physiology, Harvard School of Public Health, Boston


Article Categories:
  • Article


Previous Document:  THE PULMONARY ARTERIAL PRESSURE IN NORMAL ALBINO RATS AND THE EFFECT THEREON OF EPINEPHRINE.
Next Document:  ENERGY METABOLISM OF THE FAILING HEART.