NCT07515911 · Mayo Clinic
Comparison of Ultrasound and Anatomic Landmark Techniques of the Ulnar and Posterior Tibial Nerves
What this study is about
The purpose of this study is to determine whether placement of stimulating electrodes over the ulnar nerve is important for proper delivery of current leading to stimulation of intrinsic hand muscles.
View original scientific description
The purpose of this study is to determine whether placement of stimulating electrodes over the ulnar nerve is important for proper delivery of current leading to stimulation of intrinsic hand muscles.
Interventions
OTHER
Hand measurements
Ulnar right: * Width of wrist * Distance from radial side to middle of ulnar groove * Photo of ulnar groove o Grade ability to identify: easy, moderate-difficult, unable * Ultrasound measurements Ulnar left: * Width of wrist * Distance from radial side to middle of ulnar groove * Photo of ulnar groove o Grade ability to identify: easy, moderate-difficult, unable * Ultrasound measurements
OTHER
Foot/ankle measurements
Posterior tibial right: * Distance between prominence of medial malleolus and mid-Achilles tendon * Distance artery point of maximal pulsation to posterior border of medial malleolus * Distance artery point of maximal pulsation to medial border of Achilles tendon * Photo taken after palpating posterior tibial artery o Grade ability to identify: easy, moderate-difficult, unable * Ultrasound measurements Posterior tibial left: * Distance between prominence of medial malleolus and mid-Achilles tendon * Distance artery point of maximal pulsation to posterior border of medial malleolus * Distance artery point of maximal pulsation to medial border of Achilles tendon * Photo taken after palpating posterior tibial artery o Grade ability to identify: easy, moderate-difficult, unable * Ultrasound measurements
Primary outcome measures
Wrist width
Time frame: Baseline
Width of wrist will be measured with calipers and reported in inches
Reliability of wrist width to locate ulnar nerve
Time frame: Baseline
Total number of times that the ulnar nerve, as identified with ultrasound, falls between 5-15% of the wrist width distance as measured from the ulnar side of the wrist
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- • English speaking
Exclusion criteria
- History of ulnar neuropathy or ulnar nerve or wrist surgery (i.e. carpal tunnel)
- Upper extremity edema
Where
- Jacksonville, Florida
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Sep 17, 2026 · Source of record for eligibility and locations