There are situations in which block anesthesia would be the technique of choice, if the technique or techniques of blocking the lumbar and sacral plexus could be simplified, as they have been for brachial plexus.

Aim of the study is to evaluate the effect of adding fentanyl and clonidine to Lignocaine with adrenaline in lumbar/sciatic block with regard to the following parameters: onset of complete motor and sensory block, duration of motor and sensory block, duration of analgesia, sedative effect of fentanyl and clonidine, hemodynamic changes, complications due to adjuvants and to compare both these adjuvants.

Patients were randomly allocated into 2 groups of 30 each.

Groups L and C (lignocaine with adrenaline + clonidine)— 30 patients received 35 ml lignocaine with adrenaline + 10 ml distilled water diluted clonidine containing 100 μg + 5 ml distilled water, and groups L and F (lignocaine with adrenaline + fentanyl)—30 patients received 35 ml lignocaine with adrenaline + 10 ml distilled water diluted fentanyl containing 100 μg + 5 ml distilled water.

From present study, it can be concluded that Clonidine appears to be better adjuvant for prolongation of anesthesia and analgesia in lower limb surgeries under lumbar plexus/ sciatic block.

Chansoria M, Rathiya AK, Sethi A, Upadhyay R, Vyas N. Comparison between Additive Doses of Fentanyl and Clonidine to Lignocaine with Adrenaline in Lower Limb Surgeries under Lumbar Plexus/Sciatic Block. J Recent Adv Pain 2015;1(1):18-23.