Recruiting

Ulnar Nerve Stimulation

Sponsor:

Mayo Clinic

Code:

NCT07515911

Conditions

Ulnar Nerve

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Accepted

Interventions

Hand measurements

Foot/ankle measurements

Study Details

Brief summary:

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.

Conditions

Ulnar Nerve

Study ID

NCT07515911

Start date

Sep 2, 2026

Status verified date

Sep, 2026

Completion date

Jan, 2027

Anticipated

Primary completion date

Jan, 2027

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Accepted

Inclusion Criteria:

• English speaking

Exclusion Criteria:

  • History of ulnar neuropathy or ulnar nerve or wrist surgery (i.e. carpal tunnel)
  • Upper extremity edema

Study Design

Enrollment

40 participants

Anticipated

Interventions and Outcome Measures

Arms

Volunteers

Employee volunteers will have hand measurements obtained to help identify location of ulnar nerve.

Interventions

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

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 measure

  • Wrist width [ Time Frame: Baseline ]
  • Reliability of wrist width to locate ulnar nerve [ Time Frame: Baseline ]

Central Contacts and Locations

Central contacts

Ally R. Sapin, MS

904-956-3328sapin.alyssa@mayo.edu

Locations

Mayo Clinic

Recruiting

Jacksonville, Florida, United States, 32224

Contacts

Ally R. Sapin, MS

904-956-3328

Principal Investigator:

J. Ross Renew, MD

More Information

Sponsor

Mayo Clinic

Last update posted

Sep 17, 2026

Last verified

Sep, 2026

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-18. This information was provided to ClinicalTrials.gov by Mayo Clinic on 2026-09-17.