Abstract
The stainless steel cannula inserting method was used to observe vascular effects of 9 vasoactive substances on the isolated, perfused canine femoral artery and vein. In the vein, the order of potency for inducing vasoconstriction was norepinephrine>histamine=phenylephrine=serotonin>prostaglandin F2α > ATP > xylazine > tyramine >> KCl. It was demonstrated that the cannula inserting method is useful for observations of venous vascular reactivity.
