• Javier Ripollés, Mezquita Sandra Marmaña SM Service of Anesthesiology and Reanimation, Hospital Universitario Moisés Broggi, Sant Joan Despí, Barcelona, Spain., Alfredo Abad, and José Calvo.
• Service of Anesthesiology and Reanimation, Hospital Universitario Infanta Leonor, Madrid, Spain. Electronic address: ripo542@gmail.com.
• Braz J Anesthesiol. 2015 Jul 1; 65 (4): 255-80.

BackgroundThe transverse abdominal plan blockade is a block of abdominal wall that has diffused rapidly in the clinical practice as part of a multimodal analgesia for abdominal surgery. The performance of the ultrasound-guided technique has allowed the lowering of potential complications, as well as new approaches that were carried out according to the descriptions, and the prospective studies would make it possible to utilize the transverse abdominal plan blockade in different surgical interventions; however, the results obtained in randomized clinical trials are inconsistent.ObjectivesTo prepare a systematic review aiming to determine the efficacy of the ultrasound-guided transverse abdominal plan blockade for different surgical interventions, as well as the indications according to the approaches and their influences.MethodsTwo research approaches, one manual, and the other in Pubmed returned 28 randomized clinical trials where intervention with ultrasound-guided transverse abdominal plan blockades was performed to compare the analgesic efficacy in contrast to another technique in adults, published between 2007 and October 2013, in English or Spanish, with Jadad score>1, according to the inclusion criteria for this review. The authors analyzed independently all the randomized clinical trials.ConclusionsThe transverse abdominal plan blockades have been shown to be an effective technique in colorectal surgery, cesarean section, cholecystectomy, hysterectomy, appendectomy, donor nephrectomy, retropubic prostatectomy, and bariatric surgery. However, the data found in randomized clinical trial are not conclusive, and as a result, it is necessary to develop new and well designed randomized clinical trial, with enough statistical power to compare different approaches, drugs, doses, and volumes for the same intervention, aiming to answer the current questions and their effects in the habitual clinical practice.Copyright © 2014 Sociedade Brasileira de Anestesiologia. Published by Elsevier Editora Ltda. All rights reserved.

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