I obligation information almost NARVE IMPUSLE VELOCITY, the height of the muscle diversion (EMG)?
-Why do we have to use multiple stimulation locations?
- How copious stimulation locations are used?
- From these, how many velocity results are obtain?
- Where is the cathode of the stimulation probe located? (Close to body, away from body?
Answers:
try one of the med websites...Good Luck
Nerve Conduction Velocity (NCV)
(Electroneurography, EneG, Nerve Conduction Studies)
Procedure Overview
What is brashness conduction velocity?
Nerve conduction velocity (NCV) test is a breadth of the speed of conduction of an electrical impulse through a backbone. NCV can determine nerve wreckage and destruction.
During the test, the boldness is stimulated, usually with surface electrode patch attached to the skin. Two electrodes are placed on the skin over the nerve. One electrode stimulates the impudence with a especially mild electrical impulse and the other electrode accounts it. The resulting electrical activity is record by another electrode. This is repeated for each gall being tested.
The bottle conduction velocity (speed) is then calculated by measure the distance between electrodes and the time it takes for electrical impulse to travel between electrodes.
A related procedure that may be performed is electromyography (EMG). An EMG measures the electrical entertainment. in muscles and is recurrently performed at like peas in a pod time as NCV. Both procedures help to detect the presence, location, and extent of diseases that make worse the nerves and muscles.
The nervous system is a complex, sophisticated system that regulates and coordinates body happenings. It is made up of two major divisions, including the following:
centralized nervous system - consisting of the brain and spinal cord.
lateral nervous system - consisting of adjectives other neural elements.
Interpretation of the test results:
The speed of impertinence conduction is related to the diameter of the nerve and the level of myelination (a myelin sheath is a type of "insulation" around the nerve). A normally functioning courage will transmit a stronger and faster signal than a damaged courage.
In general, the reach of normal conduction velocity will be approximately 50 to 60 meters per second. However, the conventional conduction velocity may vary from one individual to another and from one bottle to another.
Abnormal results may be caused by some sort of neuropathy (damage to the nerve) that can result from a contusion or traumatic injury to a self-assurance. Various diseases can also cause the impulse to slow down.
Reasons for the Procedure
Nerve conduction velocity is often used along near an EMG to differentiate a nerve disorder from a muscle disorder. NCV detects a problem near the nerve whereas an EMG detects whether the muscle is functioning properly contained by response to the nerve's stimulus.
Diseases or conditions that may be evaluated with NCV include, but are not constrained to, the following:
Guillain-Barré syndrome - a condition in which the body's immune system attacks part of the pack of the peripheral jumpy system. The first symptoms may include weakness or tingling sensations surrounded by the legs.
carpal tunnel syndrome - a condition in which the median backbone, which runs from the forearm into the hand, become pressed or squeezed at the wrist by enlarged tendons or ligaments. This results in torment and numbness in the fingers.
Charcot-Marie-Tooth disease - a inherent neurological condition that affects both the motor and sensory nerves. One characteristic is impediment of the foot and lower leg muscles.
herniated disc disease
chronic inflammatory polyneuropathy and neuropathy - conditions resulting from diabetes or alcoholism
sciatic nerve problems
pinched nerves
divergent nerve injury
Nerve conduction studies may also be perform to identify the cause of symptoms such as numbness, tingling, and continuous misery.
There may be other reasons for your physician to recommend NCV.
Risks of the Procedure
The voltage of the electrical pulses used during NCV is considered thoroughly low.
There may be risks depending upon your specific medical condition. Be sure to discuss any concerns with your physician prior to the procedure.
Certain factor or conditions may interfere with the results of NVC audition, such as damage to the spinal cord, severe strain before the interview, and body temperature.
Before the Procedure
Your physician will explain the procedure to you and proposal you the opportunity to ask any questions that you might hold about the procedure.
You will be asked to sign a consent form that give your permission to do the procedure. Read the form cooperatively and ask questions if something is not clear.
Generally, no fast or sedation is required prior to the procedure.
Normal body temperature must be maintain before and during the procedure, as low body heat slows nerve conduction.
Notify your physician almost any over-the-counter or herbal supplements you are taking.
Dress in clothes that charter access to the area to be tested or that are smoothly removed.
Stop using lotions or oils on your skin for a few days earlier your procedure.
Based upon your medical condition, your physician may request other specific preparation.
During the Procedure
click image to amplify
A nerve conduction velocity procedure may be perform on an outpatient basis or as part of the pack of your stay in a hospital. Procedures may rise and fall depending on your condition and your physician's practices.
The NCV is performed by a neurologist (a physician who specializes surrounded by brain and nerve disorders), although a technologist may also complete some portions of the test.
Generally, a NCV procedure follows this process:
You will be asked to remove any clothing, jewelry, hairpins, eyeglasses, audible range aids, or other metal objects that may interfere with the procedure.
If you are asked to remove clothing, you will be given a gown to wear.
You will be asked to sit or pretend down for the test.
A neurologist will locate the nerve(s) to be studied.
A CD electrode will be attached to the skin over the nerve near a special paste and a stimulating electrode will be placed at a agreed distance away from the recording electrode.
The bottle will be stimulated by a mild and brief electrical shock given through the stimulating electrode.
You may experience minor discomfort for a few seconds.
The stimulation of the bravery and the detected response will be displayed on an oscilloscope (a monitor that displays electrical activity surrounded by the form of waves).
After the Procedure
The paste used to attach the electrodes will be removed from your skin.
After the audition, you may return to your previous activities, unless your physician advise you differently. Your physician may instruct you to avoid strenuous activities for the rest of the morning.
Your physician may give you extra or alternate instructions after the procedure, depending on your particular situation.
Online Resources
The content provided here is for informational purposes simply, and was not designed to diagnose or treat a strength problem or disease, or replace the professional medical advice you receive from your physician. Please consult your physician beside any questions or concerns you may enjoy regarding your condition.
This page contains links to other Web sites beside information about this procedure and related strength conditions. We hope you find these sites helpful, but please remember we do not control or back up the information presented on these Web sites, nor do these sites endorse the information contained here.
American Academy of Neurology
American Academy of Orthopaedic Surgeons
American Association of Neurological Surgeons
Charcot-Marie-Tooth Association
Muscular Dystrophy Association
Myasthenia Gravis Foundation of America
National Institute of Diabetes and Digestive and Kidney Diseases
National Institute of Neurological Disorders and Stroke
National Institutes of Health (NIH)
National Library of Medicine
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