Addition of a vasoconstrictor along with LA causes ?: (A) More systemic toxicity, (B) Fall in BP, (C) Prolongation of duration, (D) Reduced intensity of block
Answer is A. Ans. is 'c' i.e., Prolongation of duration Vasoconstrictor Remember o Adrenaline is the most commonly used vasoconstrictor. o Felypressin (synthetic vasopressin) is an alternative. It does not affect BP and HR --> preferred in patients with cardivascular disease. - o Vasoconstrictor should not be added for ring block of hands, feet, finger, penis and in pinna --> All these organs are supplied by endaeries.