vasoconstrictor

vasoconstrictor /vaso·con·stric·tor/ (-kon-strik´ter)

1. causing constriction of blood vessels.

2. a nerve or agent that does this.

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va·so·con·stric·tor (vz-kn-strktr)

n.

Something, such as a nerve or drug, that causes vasoconstriction.

adj.

Producing vasoconstriction.

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vasoconstrictor (vāˈ·zō·kn·strikˑ·ter),

n a substance that narrows blood vessels by constricting the smooth muscle in the walls; increases blood pressure.

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vasoconstrictor (vā´zōknstrik´tur),

n (vasopressor), an agent that causes a rise in blood pressure by constricting the blood vessels. In local areas, it causes constriction of the arterioles and capillaries.

vasoconstrictor, adrenergic agents as,

n adrenaline-mimicking drugs that increase the duration of local anesthesia by constricting the blood vessels, thereby safely concentrating the anesthetic agent for an extended duration and reducing hemorrhage. Excessive amounts can cause systemic toxicity, especially in certain medical conditions or when combined with certain medications. Also used in gingival retraction cord impregnated with epinephrine. In dentistry, this includes epinephrine and levonordefrin.

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vasoconstrictor

1. causing constriction of the blood vessels.

2. a vasoconstrictive agent.

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vasoconstrictor agents

includes some prostaglandins, thromboxane A₂, leukotriene D₄, angiotensin II, vasopressin, neuropeptide Y, endothelin.

vasoconstrictor fibers

adrenergic nerve fibers in the walls of all blood vessels except capillaries.