Comparison of Ultrasound and Anatomic Landmark Techniques... | NCT07515911

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.

Placement of stimulating electrodes over the ulnar nerve is important for proper delivery of current leading to stimulation of intrinsic hand muscles. Accuracy may be improved with a better description of the precise location of the ulnar nerve. There may be a simple fraction of the wrist width that can be utilized to assist the busy practitioner with accurate placement of the stimulating electrodes over the ulnar nerve. It is expected that the ulnar groove, when easily identified, will be an accurate estimate (within 10% of total wrist width) of the ulnar nerve location.

Label	Type	Description	Intervention Names
Volunteers		Employee volunteers will have hand measurements obtained to help identify location of ulnar nerve.	Other: Hand measurements Other: Foot/ankle measurements

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

Name	Type	Description	Arm Group Labels	Other Names
Hand measurements	Other	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

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

Measure	Description	Time Frame
Wrist width	Width of wrist will be measured with calipers and reported in inches	Baseline
Reliability of wrist width to locate ulnar nerve	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	Baseline

Width of wrist will be measured with calipers and reported in inches

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

Inclusion Criteria:

• English speaking

Exclusion Criteria:

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

Mayo Clinic employees who meet inclusion/exclusion criteria

Name	Role	Phone	Extension	Email
Ally R. Sapin, MS	Contact	904-956-3328		sapin.alyssa@mayo.edu

Name	Affiliation	Role
J. Ross Renew, MD	Mayo Clinic	Principal Investigator

Facility	Status	City	State	ZIP	Country	Contacts
Mayo Clinic		Jacksonville	Florida	32224	United States

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