Document Detail


Regulation of fetal placental blood flow in the lamb.
MedLine Citation:
PMID:  6433727     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Inflatable occluders were placed on the distal aorta of 11 fetal lambs. After 1 wk of control measurements, fetal placental blood flow was reduced to about two-thirds of its control value for an average period of 2 wk. No allowance was made for fetal growth. During the period of flow restriction, fetal growth was 2%/day. Femoral arterial blood pressure was reduced from a control value of 41 to 27 mmHg (P less than 0.001). There was an insignificant increase in carotid arterial blood pressure from 48 to 50 mmHg. Placental resistance to flow did not decrease more than could be accounted for by the increase in gestational age in the course of the experiment. It is concluded that fetal placental blood flow is not under feedback control, since neither of the determinants of flow (i.e., driving pressure and resistance) responded to its chronic reduction.
Authors:
D F Anderson; J J Faber
Related Documents :
10728307 - Blood flow distributions by microsphere deposition methods.
4015227 - Hormonal role of adenosine in maintaining patency of the ductus arteriosus in fetal lambs.
9589147 - Prenatal sonographic characteristics and doppler blood flow study in a case of a large ...
10215077 - Diagnosis of sex and cystic fibrosis status in fetal erythroblasts isolated from cord b...
453547 - Sem study of the choroid plexus of the lateral ventricle in the cat.
2742667 - Pulse oximetry in the accident and emergency department.
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The American journal of physiology     Volume:  247     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1984 Sep 
Date Detail:
Created Date:  1984-10-24     Completed Date:  1984-10-24     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  R567-74     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Blood Pressure
Carbon Dioxide / blood
Collateral Circulation
Female
Fetal Blood*
Fetus / physiology
Growth
Hydrogen-Ion Concentration
Oxygen / blood
Placenta / blood supply*
Regional Blood Flow
Sheep / embryology*
Vascular Resistance
Grant Support
ID/Acronym/Agency:
5 R01 HL-27194/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
124-38-9/Carbon Dioxide; 7782-44-7/Oxygen

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


Previous Document:  Myocardial cell volume and coronary resistance during diminished coronary perfusion.
Next Document:  Long-term cannulation model for blood sampling and intragastric infusion in the rat.