[Coupled functions of vessels and lymph outflow in the cat small intestine during stimulation of the sympathetic nerves].
Experiments in cats with the constant blood volume perfusion of the small intestine vessels revealed constrictor responses of arterial, venous and lymphatic vessels to electrical stimulation of sympathetic nerves, the responses being most obvious at the 8, 10 and 10-20 Hz frequency of stimulation. Activation of sympathetic nerves augmented the pre- and postcapillary resistance of the vessels, the resistance being the greatest at 8 and 10 Hz. Stretching ability of venous vessels decreased. The capillary hydrostatic pressure increased, its shift being maximal at 10 Hz. The capillary filtration coefficient increased, the increment being maximal at 1 Hz. The lymph production and outflow enhanced. The motor activity of the intestine was suppressed. Analysis of the conjugated shifts in macro- and microhemodynamic parameters as well as in lymph flow revealed a transcapillary transition of intravascular fluid into the extravascular space due to the increase in the capillary hydrostatic pressure followed with a resorption into the roots of the intestine lymphatic system.
N V
NV
Kostiushina
I S
IS
Kul'baev
B I
BI
Tkachenko
D000818:Animals; D001808:Blood Vessels / Q000502:physiology*; D002415:Cats; D004558:Electric Stimulation; D005260:Female; D066298:In Vitro Techniques; D007421:Intestine, Small / Q000098:blood supply / Q000294:innervation*; D008208:Lymphatic System / Q000502:physiology*; D008297:Male; D013564:Sympathetic Nervous System / Q000502:physiology*
Soopriazhennye funktsii sosudov i limfoottok v tonkoĭ kishke koshek pri vozbuzhdenii simpaticheskikh nervov.