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Prospective Clinical Trial - Obturator Reflex Predictors and Blockage

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ClinicalTrials.gov Identifier: NCT02228330
Recruitment Status : Unknown
Verified October 2017 by Rabin Medical Center.
Recruitment status was:  Enrolling by invitation
First Posted : August 29, 2014
Last Update Posted : October 17, 2017
Sponsor:
Information provided by (Responsible Party):
Rabin Medical Center

Brief Summary:
The aim of this study is to estimate the incidence rate of obturator nerve reflex and leg jerking during Transurethral Resections of Bladder Tumors (TURBTs), evaluate the efficacy of obturator nerve block in the prevention of inadvertent muscle spasm, and to identify predictors for both the jerking reflex and successful nerve block.

Condition or disease Intervention/treatment Phase
Malignant Neoplasm of Urinary Bladder Procedure: obturator nerve block Not Applicable

Detailed Description:

Study design: A single center single arm prospective study aiming to estimate the incidence rate of obturator nerve reflex and leg jerking during TURBTs, evaluate the efficacy of obturator nerve block (ONB) in the prevention of inadvertent muscle spasm, and identify predictors for both the jerking reflex and successful nerve block.

Study population: patients who are scheduled for TUR for bladder tumor, as standard care, who are willing and able to participate in the study

Intervention: a uni-lateral ONB (using Lidocaine 2%)

Study outline: Once in the operating room patients will be monitored by continuous electrocardiography, non-invasive arterial blood pressure measurement, and pulse oximetry in the usual manner. They will then undergo general or spinal anesthesia according to their preference and at the discretion of the treating anesthesiologist, without the use of muscle relaxants. As part of the study, a uni-lateral ONB will be performed under ultrasound guidance- using 2% lidocaine for obtaining a short term block, for the duration of the procedure itself. The non-blocked nerve will be used as control. The surgeon will be blinded as to the side in which the ONB has been performed. A catheter will be used to fill the bladder with saline to its full capacity. The inner wall of the bladder will then be stimulated to test for an obturator nerve reflex and leg jerking. Stimulation will be done using a trans-resectoscope and a single-twitch electrical current generated by a neuromuscular monitoring device, as previously described by Mihara et al. Four different bladder volumes will be tested. For each bladder volume, a reflex response on both sides will be documented and graded. The investigators will then proceed with a TUR in the usual manner.

Primary endpoints: frequency of obturator jerk reflex and efficacy of obturator nerve block


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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 50 participants
Intervention Model: Single Group Assignment
Masking: Single (Investigator)
Primary Purpose: Treatment
Official Title: Prospective Clinical Trial - Obturator Reflex Predictors and Blockage
Study Start Date : July 2014
Estimated Primary Completion Date : October 2018
Estimated Study Completion Date : October 2018

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Bladder Cancer

Arm Intervention/treatment
Experimental: uni-lateral obturator nerve block

Patients scheduled for TUR for bladder tumor Intervention: uni-lateral obturator nerve block.

non-blocked obtorator side of each patient will be used as control

Procedure: obturator nerve block
a uni-lateral obturator nerve block will be performed under ultrasound guidance- using 2% lidocaine for obtaining a short term block.




Primary Outcome Measures :
  1. efficacy of obturator nerve block in preventing inadvertent obturator jerk [ Time Frame: intraoperative ]
    percentage of subjects for which the obtorator nerve block prevnted inadvertent obturator jerk


Secondary Outcome Measures :
  1. incidence rate of obturator nerve jerk reflex [ Time Frame: end of study (one year) ]
    frequency of obturator nerve jerk reflex



Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Adult patient, older than 18 yo, scheduled for TUR for bladder tumor.
  • The subject is willing and able to read, understand and sign the study specific informed consent form.

Exclusion Criteria:

  • Patients with known coagulopathy, including patients receiving antithrombotic or thrombolytic therapy not in compliance with standard precautions.
  • Patients with a known allergy to anesthetics.
  • Patients who underwent partial cystectomy.
  • Patients with tumors involving bladder diverticula.
  • Patients with pre-existing obturator nerve injury or pre-existing neurologic deficits.
  • Patients with neuromuscular disease.
  • Patients with local infection above planned ONB site.
  • Patients in whom the use of muscle relaxants is deemed necessary by the anesthesiologist.
  • Patients with inguinal lymphadenopathy.
  • Patients unable to sign an informed consent form.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02228330


Locations
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Israel
Rabin Medical Center
Petach-Tikva, Israel, 4941492
Sponsors and Collaborators
Rabin Medical Center
Investigators
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Principal Investigator: David Margel, MD, PhD Rabin Medical Center

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Responsible Party: Rabin Medical Center
ClinicalTrials.gov Identifier: NCT02228330     History of Changes
Other Study ID Numbers: 0063-14-RMC
First Posted: August 29, 2014    Key Record Dates
Last Update Posted: October 17, 2017
Last Verified: October 2017
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided
Keywords provided by Rabin Medical Center:
Transurethral resection of bladder tumors
Obturator nerve reflex
Obturator nerve block
Additional relevant MeSH terms:
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Urinary Bladder Neoplasms
Neoplasms
Urologic Neoplasms
Urogenital Neoplasms
Neoplasms by Site
Urinary Bladder Diseases
Urologic Diseases