A Patient Has Been on a Dopamine Drip,and the Nurse

A patient has been on a dopamine drip,and the nurse notices that the infusion has extravasated into the tissue of the forearm.After stopping the infusion,the nurse immediately injects phentolamine into the interstitial catheter.What is the effect of this action?

A) It causes vasoconstriction and rapid uptake of the extravasated dopamine.
B) It causes arterial vasoconstriction and reduced pain and swelling at the site.
C) It increases peripheral vascular resistance and reduces arterial pressure at the site.
D) It increases blood flow to the ischemic site by vasodilation and prevents permanent tissue damage.

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