An interventional study of Electromyography in Ulnar Neuropathy, sponsored by University of Toledo Health Science Campus. Completed at 1 site in United States. Open to participants aged 50 Years and older. Per ClinicalTrials.gov, last updated 2017-09-25.
Sponsored by University of Toledo Health Science Campus · Not applicable, Interventional, and Diagnostic
This study is to investigate the incidence of undiagnosed ulnar neuropathy in patients undergoing surgery. The investigators hope to determine if patients with ulnar neuropathy have changes in nerve conduction latency during surgery.
After obtaining an informed consent, the participating subjects will be asked a few questions relating to ulnar nerve dysfunction. Following this the investigators will do a focused physical exam looking for decrement of sensation in the distribution of the ulnar nerve and muscle strength of the hand muscles supplied by the ulnar nerve. After this the subjects will undergo an EMG exam to measure the conduction velocity of the ulnar nerve. Basically the nerve will be stimulated with a small current and the resultant muscle activity of the hand muscle will be picked up using an EKG like patch applied to the skin over the hand. If a subject is diagnosed to have ulnar neuropathy preoperatively the investigators would study the EMG based nerve conduction during surgery at 30-60 minute intervals for the duration of surgery. For purposes of comparison the investigators would measure the ulnar nerve conduction during surgery in age and sex matched controls.
University of Toledo Health Science Campus is the lead sponsor of 35 studies on the registry; none are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
All subjects will have nerve conduction studies (Electromyography/EMG) pre-operatively, monitored intra-operatively and immediately post-operative.
Other: Electromyography
All subjects will have an EMG before, during and immediately after surgery.
Also known as: EMG
Prevalence of ulnar neuropathy in patients scheduled to undergo anesthesia and surgery as measured by electromyography
Prevalence of undiagnosed or subclinical ulnar neuropathy as determined by electromyography
Time frame: Day 1
Amplitude (mV)
Compare preoperative, perioperative and postoperative amplitude changes from EMG
Time frame: Day 1
Latency (ms)
Compare preoperative, perioperative and postoperative latency changes from EMG
Time frame: Day 1
Velocity (m/s)
Compare preoperative, perioperative and postoperative velocity changes from EMG
Time frame: Day 1
This study is completed, as verified in Sep 2016. You cannot join it, but the record below documents what was studied.
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Ulnar Neuropathies
University of Toledo Health Science Campus