Validation of Triggered EMG Values for Pedicle Screws Using a Powered Screwdriver
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Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Previous studies have shown how triggered electromyogram (EMG) pedicle screw stimulation can be used to effectively test correct pedicle screw placement in the lumbar and thoracic vertebrae. Most papers agree that if more than 6mA of current are needed to elicit a response the screw is correctly placed in the bone. If there is a response with less than 6mA there is a strong likelihood of a breach of the pedicle wall or invasion of the spinal canal. Typically this triggered EMG stimulation is done after all the screws have been placed with a ball-tipped probe and is paired with intraoperative fluoroscopy to ensure correct placement of the screws. Another method of testing the current for each screw is with a powered screwdriver, which can stimulate and give a reading as the surgeon places each screw. Both of these methods are currently used by surgeons, however the powered screwdriver has been found to be a faster method. The investigator's aim with this study is to compare these two methods of testing triggered EMG values. The investigators plan on doing this by testing each screw with both the ball-tipped probe and the powered screwdriver, in order to see if there are any statistically significant differences between the readings.
Study identification
- NCT ID
- NCT02064101
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 27 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 8 Years to 21 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Feb 2014 (Type not available)
- Primary completion
- Jul 2015 (Actual)
- Completion
- Jul 2015 (Actual)
- Last update posted
- Oct 25, 2016
2014 – 2015
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Children's Hospital Colorado | Aurora | Colorado | 80045 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT02064101, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Oct 25, 2016 · Synced Nov 15, 2026
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