Journal of AdvancedMedical and Dental Sciences Research

Background: Anorectal disease is one of the most common problems in ambulatory surgery. Surgery is the best therapy for chronic anal fissure, fistula in ano, third and fourth degree hemorrhoids. The present study was conducted to assess intrathecal dexmedetomidine as adjuvant for spinal anaesthesia for perianal ambulatory surgeries. Materials & Methods: 60 adult patients of American Society of Anaesthesiologists physical status I and II presenting for perianal surgeries were divided into 2 groups. Group I patients received intrathecal 0.5% hyperbaric bupivacaine 6 mg (1.2 ml) with injection dexmedetomidine 5 μg in 0.5 ml of normal saline and group II received intrathecal 0.5% hyperbaric bupivacaine 6 mg (1.2 ml) with 0.5 ml of normal saline. Results: The mean weight in group I was 64.5 kg and in group II was 63.1 kg, height was 156.2 cm in group I and 158.3 cm in group II, ASA grade I was 35 and II was 25 in group I and I in 30 and II in 30 in group II. The mean duration of surgery was 26.1 minutes in group I and 28.4 minutes in group II. The mean duration of sensory block in group I was 432.4 minutes and in group II was 310.2 minutes, duration of motor block was 324.6 minutes in group I and 216.4 minutes in group II and time to ambulation was 310.2 minutes in group I and 210.4 minutes in group II. The difference was significant (P< 0.05). Conclusion: Intrathecal dexmedetomidine 5 μg added to intrathecal bupivacaine 6 mg as adjuvant may not be suitable for ambulatory perianal surgeries due to prolongation of motor blockade.