EMG

Electromyography is a means of assisting the examination of diseases through myoelectricity. The use of electronic instruments to record the electrical activity of muscles at rest or contraction, and the application of electrical stimulation to examine nerve and muscle excitation and conduction functions. English referred to as EMG. Through this examination, the functional status of peripheral nerves, neurons, neuromuscular junctions, and muscles themselves can be determined. Basic Information Specialist classification: neurological examination classification: neuroelectrophysiology Applicable gender: whether men and women apply fasting: not fasting Tips: Stop the drug before the test, such as neostigmine drugs should be discontinued 16 hours before the test. Normal value normal. Clinical significance Abnormal result By measuring the time limit and amplitude of the motor unit potential, whether there is spontaneous electrical activity in a quiet state, and the waveform and amplitude of the muscle contraction, the neurogenic damage and myogenic damage can be distinguished, and the acute and chronic damage of the anterior horn of the spinal cord can be diagnosed. (such as spinal anterior gray matter, motor neuron disease), nerve roots and peripheral neuropathy (such as EMG can help determine the location, extent, extent and prognosis of nerve damage). In addition, it has diagnostic value for nerve compression lesions, neuritis, genetic metabolic disorder neuropathy, and various muscle diseases. In addition, EMG is also used to track the recovery process and efficacy of the disease during the treatment of various diseases. Using computer technology, it can be used for automatic analysis of EMG, such as analysis of electromyography, single fiber EMG and giant electromyography, to improve the positive rate of diagnosis. People who need to be checked 1. Spinal cord disease. 2. Peripheral nervous system diseases. 3. nerve root compression. 4. Myogenic diseases. 5. Neuromuscular junction disease. 6. Cone system and extrapyramidal diseases. Precautions Before inspection: It is detected in a regular hospital as a patient with bacteremia, because the electromyography of patients with bacteremia may sometimes cause bacterial endocarditis in patients with heart valves. Electromyography should be avoided if hemophilia or platelets are significantly reduced or clotting time is abnormal. Those who are positive for hepatitis B surface antigen should switch to disposable concentric needle electrodes to avoid cross infection. Stop the drug before the test. If the neostigmine drug should be stopped 16 hours before the test. When checking: There is some pain and damage during the inspection, so this check should not be abused unless necessary. In addition, the muscles can be completely relaxed or exert different degrees of force during the examination. Muscle biopsy and muscle zymography should be avoided for muscles that have just undergone EMG. Inspection process During the examination, the electrodes are inserted into the muscles, and the biocurrent of the muscles in the resting and contracted state is amplified by the amplification system, and then displayed by the cathode ray oscilloscope. Not suitable for the crowd Patients with bacteremia, hemophilia patients, hepatitis B patients. Adverse reactions and risks Generally no adverse reactions.