Neurometer vs Nerve Stimulator: Block Patients

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01662154
Recruitment Status : Unknown
Verified May 2015 by University of Alberta.
Recruitment status was:  Active, not recruiting
First Posted : August 10, 2012
Last Update Posted : May 25, 2015
Information provided by (Responsible Party):
University of Alberta

Brief Summary:
Anesthetizing nerves in the extremities is an effective way to freeze an area in preparation for surgery. The doctor injects local anesthetic in an appropriate area, interrupting signals from nerves in that area that control movement and sensation. Depending on how much anesthetic is injected, the doctor can impair both movement and sensation or sensation alone. Currently, there are a few methods used to determine how much sensation a patient has in an area, such as testing the patient's response to a pinprick or cold sensation on the skin. Unfortunately, these methods are subjective and don't always give an accurate measurement of how extensive the block is. For this reason, a more accurate and objective method of assessing nerve blocks is needed. We wish to perform a study to test two nerve stimulation devices to compare their ability to give adequate measurements of nerve activity before and after local anesthesia. If we find that a common nerve stimulator can consistently give accurate readings of nerve activity, anesthesiologists may be able to use this device to determine how well a nerve block is working and adjust the patient's anesthesia accordingly.

Condition or disease Intervention/treatment Phase
Nerve Block Assessment Device: Neurometer assessment Device: Nerve stimulator assessment Not Applicable

  Show Detailed Description

Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 60 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Supportive Care
Official Title: Percutaneous Nerve Stimulation as a Means to Assess Nerve Block Effectiveness
Study Start Date : July 2012
Actual Primary Completion Date : July 2013
Estimated Study Completion Date : December 2015

Arm Intervention/treatment
Experimental: Nerve stimulator
Patients in this group will have their nerve blocks assessed with a common nerve stimulator (Stimuplex HNS 12, B.Braun, Germany).
Device: Nerve stimulator assessment
Activity of nerve(s) to be blocked will be assessed with the Stimuplex HNS 12 nerve stimulator before and after administration of local anesthetic.
Active Comparator: Neurometer
Patients in this group will have their nerve block assessed using the Neurometer.
Device: Neurometer assessment
Activity of nerve(s) to be blocked will be assessed with the Neurometer before and after administration of local anesthetic.

Primary Outcome Measures :
  1. Accuracy of nerve activity measurement. [ Time Frame: During nerve stimulation (approximately 30 seconds for each stimulation test) ]
    Testing whether a common nerve stimulator device detects nerve activity as accurately and consistently as the Neurometer.

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Ages Eligible for Study:   18 Years to 90 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Adult (18 years of age or older) patients who have provided informed consent.
  • Outpatients scheduled for elective surgery on the upper or lower extremity or abdomen.
  • Requirement for nerve block.

Exclusion Criteria:

  • Failure to provide informed consent.
  • Neuropathic lesions or polyneuropathic conditions.
  • Implanted electrical devices (e.g., pacemaker, spinal cord or peripheral nerve stimulator).
  • Allergy to local anesthetics.
  • Severe coagulopathy.
  • Bilateral upper limb surgery.

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 identifier (NCT number): NCT01662154

Canada, Alberta
University of Alberta Hospital
Edmonton, Alberta, Canada, T6G 2C8
Sponsors and Collaborators
University of Alberta

Pither CE, Raj PP, Ford DJ. (1985) The use of peripheral nerve stimulators for regional anesthesia: A review of experimental characteristics, technique, and clinical implications. Reg. Anesth. 10:49-58.
NEUROMETER® Clinical and Research Update (2010 - 2011). Available at:
Stimuplex® HNS 12 User Manual. B.Braun Melsungen AG. Available at:
"Generic IRB Application for Research Involving the Electrodiagnostic sensory Nerve Conduction Threshold (sNCT) Evaluation, August 19, 2004, Diagnostic Transcutaneous Electrical Stimulation in Individuals." Available at:

Responsible Party: University of Alberta Identifier: NCT01662154     History of Changes
Other Study ID Numbers: Pro00031858
First Posted: August 10, 2012    Key Record Dates
Last Update Posted: May 25, 2015
Last Verified: May 2015