What indicates successful vasodilation during regional anesthesia?

• A. Increased pain sensation
• B. Blocked area feels cooler
• C. Blocked area feels warmer
• D. Deterioration in muscle tone

Answer: (C)

In the context of regional anesthesia, successful vasodilation is indicated by a change in temperature of the blocked area. When vasodilation occurs, blood flow to that region increases, which can lead to an increase in the temperature of the tissue. This is often perceived as the area feeling warmer to the touch.

The other choices do not signify successful vasodilation. Increased pain sensation would imply that the anesthesia is not effective. A blocked area feeling cooler would suggest vasoconstriction or inadequate blood flow, which does not align with successful vasodilation. Deterioration in muscle tone could indicate other complications or the depth of anesthesia, rather than being a direct indicator of successful vasodilation. Thus, the correct representation of successful vasodilation is indeed that the blocked area feels warmer.