Intrathecal Prilocaine and Adductor Canal Block vs Intrathecal Bupivacaine Alone for Ambulatory Knee Arthroscopy

- Although bupivacaine is safe and has a low rate of transient neurologic symptoms, the prolonged sensory and motor block is a drawback for day-case spinal anesthesia.Intrathecal hyperbaric prilocaine causes a much shorter motor block, with a similar onset time and lower inter-individual variability in motor block duration. Furthermore, the peripheral nerve block is used as an adjunct to the spinal anesthesia to prolong the surgical anesthetic conditions.

Inclusion Criteria:American Society of Anesthesiologists (ASA) score I-II.Body mass index < 35 kg/m2Exclusion Criteria:Patient's refusal.Known coagulopathy.Known peripheral neuropathy or neurological deficits.Known allergy to study drugs.