ESRA Academy. Dobronska K. Sep 8, 2016; 138303; 0130 Topic: Peripheral Nerve Blocks
Karolina Dobronska
Karolina Dobronska

Access to Premium content is currently a membership benefit.

Click here to join ESRA or renew your membership.

Discussion Forum (0)
Rate & Comment (0)
Background and Aims:

The aim of the study was to evaluate the safety and effectiveness of ultrasound-guided ONB as a method of preventing adductor muscles contraction during transurethral resection of bladder tumour (TURBT) localized on the lateral wall. 


Due to prior spinal anaesthesia the patient does not feel uncomfortable during the blockade and the interadductor approach gives the possibility to perform it in the lithotomy position. For nerve identification a linear transducer is used. It is placed next to the grain just under the adductor longus tendon. Between adductor longus and brevis, in fascial plane, an anterior branch of obturator nerve should be visualized. The needle is advanced in an out-of-plane trajectory. If there are problems with nerve identification the anaesthetic is injected in fascial plane between adductors muscles - longus and brevis.10 ml of 2% lidocaine is used for single block and 2 x 10 ml of 2% lidocaine with epinephrine when bilateral one is needed.


It is an interim analysis. A 56 ONB were performed in 50 patients (age 35-90) with TURBT under spinal anaesthesia. The nerve was visualized in 78%. The efficacy of ONB was 92,8%. The failure of ONB was irrespectively of nerve visualization. There were no urinary bladder perforation; neither hematomas nor neurological adverse events were observed.


The described method offers a high rate of efficacy and ensures safe conditions for the resection of a tumor located on the inferolateral wall of the urinary bladder. The risk of complication is low. NCT02696733

Code of conduct/disclaimer available in General Terms & Conditions
Anonymous User Privacy Preferences

Strictly Necessary Cookies (Always Active)

MULTILEARNING platforms and tools hereinafter referred as “MLG SOFTWARE” are provided to you as pure educational platforms/services requiring cookies to operate. In the case of the MLG SOFTWARE, cookies are essential for the Platform to function properly for the provision of education. If these cookies are disabled, a large subset of the functionality provided by the Platform will either be unavailable or cease to work as expected. The MLG SOFTWARE do not capture non-essential activities such as menu items and listings you click on or pages viewed.

Performance Cookies

Performance cookies are used to analyse how visitors use a website in order to provide a better user experience.

Google Analytics is used for user behavior tracking/reporting. Google Analytics works in parallel and independently from MLG’s features. Google Analytics relies on cookies and these cookies can be used by Google to track users across different platforms/services.

Save Settings