Comparison of Intrathecal Dexmedetomidine Versus Fentanyl as Adjuvants to Bupivacaine on Post-operative Urinary Retention in Knee Joint Arthroscopic Surgeries

In a 3 ml syringe, 5 µg dexmedetomidine was added to the 2 ml of 10 mg hyperbaric bupivacaine, to have a total volume of 2.5 ml for intrathecal spinal injection over 3 minute without barbotage

In a 3 ml syringe, 25 μg fentanyl was added to the 2 ml of 10 mg hyperbaric bupivacaine, to have a total volume of 2.5 ml for intrathecal spinal injection over 3 minute without barbotage