Clinical trial · Interventional
Ultrasound-Guided ONB for Transurethral Procedures - Interadductor Approach
Ultrasound-Guided Obturator Nerve Block for Transurethral Procedures - Interadductor Approach
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
Obturator nerve block is an effective method to prevent adductor muscles contraction during transurethral resection of bladder tumour 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. The aim of the study was to evaluate the safety and effectiveness of ultrasound-guided obturator nerve identification and blockade for TURBT.
Conditions
Conditions (3)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Nerve Block | — | UNRESOLVED | — |
| Transurethral Resection | — | UNRESOLVED | — |
| Urinary Bladder Neoplasms | Bladder Neoplasm | ALIAS | 0.90 |
Interventions
Interventions (3)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| 0.9% Natrium Chloratum with a 2nd generation cephalosporin | Drug | — | UNRESOLVED |
| lidocaine 2% | Drug | — | UNRESOLVED |
| Ultrasound | Device | — | UNRESOLVED |
Design
Arms and outcomes
Arms (1)
- type
- EXPERIMENTAL
- label
- UG - ONB
- description
- Patients with the bladder tumor located on the lateral wall, with the high risk of adductor muscles contraction during TURBT under spinal anesthesia.
- interventionNames
- Device: Ultrasound
- Drug: lidocaine 2%
- Drug: 0.9% Natrium Chloratum with a 2nd generation cephalosporin
Primary outcomes (1)
- measure
- Effectiveness of ultrasound guided obturator nerve block - evaluated by a number of participants having transurethral resection of bladder tumor without unintended obturator nerve stimulation.
- timeFrame
- 30 months
- description
- The investigator evaluates whether the urologist was able to perform safe electroresection of bladder tumor with no extremity movement. All extremity movements due to obturator nerve stimulation and all necessities to perform general anesthesia will be counted as unsuccessful ultrasound - guided ONB.
Secondary outcomes (3)
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
Show eligibility criteria text
Inclusion Criteria: * informed consent * bladder tumor located on the lateral wall * transurethral resection of the bladder tumor * urologist decision that there is a risk of the stimulation of obturator nerve during resection * spinal anesthesia Exclusion Criteria: * patients' refusal * contraindications for spinal anesthesia * skin lesions at injection site * patients who really did not need ONB.
References
Publications (2)
- BACKGROUNDPladzyk K, Jureczko L, Lazowski T. Over 500 obturator nerve blocks in the lithotomy position during transurethral resection of bladder tumor. Cent European J Urol. 2012;65(2):67-70. doi: 10.5173/ceju.2012.02.art2. Epub 2012 Jun 12. PMID 24578931
- RESULTThallaj A, Rabah D. Efficacy of ultrasound-guided obturator nerve block in transurethral surgery. Saudi J Anaesth. 2011 Jan;5(1):42-4. doi: 10.4103/1658-354X.76507. PMID 21655015