Intravascular catheterization of the uterine and umbilical vessels, which was first developed for use chronically in ruminants (Meschia, Cotter, Breathnach & Barron, 1965) has been used in the present acute experiments on pregnant sows (75 to 110 days' gestation). The animals were anaesthetized with sodium pentobarbitone. Vinyl catheters, filled with heparin-saline, were placed in the maternal aorta, vena cava and the uterine veins of each horn. Similar catheters were also inserted into the umbilical artery and vein through placental branches without exposure of either the cord or foetus. The Po2, Pco2 and pH of both the foetal and maternal blood were recorded during each experiment which from the induction of anaesthesia to the final sample usually lasted 5–6 h. In some animals uterine and umbilical blood flows were estimated by the diffusion—equilibrium method of Crenshaw, Huckabee, Curet, Mann & Barron (1968).
Plasma samples were separated immediately and
Journal of Endocrinology is committed to supporting researchers in demonstrating the impact of their articles published in the journal.
The two types of article metrics we measure are (i) more traditional full-text views and pdf downloads, and (ii) Altmetric data, which shows the wider impact of articles in a range of non-traditional sources, such as social media.
More information is on the Reasons to publish page.
| Sept 2018 onwards | Past Year | Past 30 Days | |
|---|---|---|---|
| Full Text Views | 1 | 1 | 0 |
| PDF Downloads | 1 | 0 | 0 |
Online ISSN: 1479-6805
Print ISSN: 0022-0795
Strengthening biomedical communities
to advance science and health
CONTACT US
Bioscientifica Ltd | Starling House | 1600 Bristol Parkway North | Bristol BS34 8YU | UK
Bioscientifica Ltd | Registered in England no 3190519
