Background: As surgeries are known to be a condition of physical stress for the human body, a search for novel technique is always on to reduce the pain caused by the surgical incision in post-operative period and also to minimize the associated side effects. Various methods and techniques have been discovered over the years and added to the armament of the anesthetist to help in relieving the distress of the patient. Transabdominal block is one such newer technique where drug is delivered in between the muscles of the abdomen i.e internal oblique and transverse abdomnis muscle.The Tranverse abdominal plane block can be given by two techniques, first is landmark based technique where site of injection is based on the anatomical structures of the abdominal region and second is USG guided technique where USG probe is held to identify abdominal structures on identification of the plane, the drug is injected at the site to provide long term analgesia in post-operative patients. The technique requires injecting a dose of local anaesthetic agent like ropivacaine or bupivacaine in a concentration that blocks the sensory stimulus reaching the centres of pain situated in CNS. Among its various benefits TAP block is known to decrease the need for systemic analgesic which are known to have side effects like respiratory depression, renal toxicity and also helps in for early ambulation of the patients. Methods: For the purpose of study to include A sum up number of subjects in the age-group 20-60 years patients, undergoing surgeries of the lower abdomen who will be given TAB block by an experienced anaesthesiologist. Patients will be divided into two groups based on random allocation, one receiving {0.25%} bupivacane and other group receiving {0.5%}. Ropicane. Patients will be monitored on criteria like duration of post-operative analgesia, time for rescue analgesia required by the patient, hemodynamic stability, and on this basis a more effective drug will be judged. Conclusion: with the following studies we are expecting the result that in addition to (0.25) percent bupivacaine, (0.5) percent ropivacaine may have prolong post-operative analgesia with reduced systemic side effects.

Post-operative analgesia, Nerve block, TAB block, local anaesthetic agents.