Lab study in physical medicine and rehabilitation 台北榮總復健醫學部 R4 程遠揚.

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Lab study in physical medicine and rehabilitation 台北榮總復健醫學部 R4 程遠揚

Important Lab studies in physical medicine and rehabilitation Nerve conduction study and electromyography Urodynamic study Cardiopulmonary exercise testing

Nerve Conduction study Tools: Stimulator, grounding electrode, reference electrode, recording electrode Note the amplitude, duration, area, distal latency, and conduction velocity in each study

Nerve conduction study Amplitude: direct correlate to the axon fiber remained. Other reasons of amplitude drop includes: myopathy, neuromuscular junction disease, conduction block, or disuse atrophy Conduction velocity: correlate to the integrity of nerve myelin. CMAP velocity is calculated by both distal and proximal stimulation. SNAP velocity is calculated directly by distal stimulation.

Electromyography Resting: observe if spontaneous activity including positive sharp wave or fibrillation presents Minimal contraction: Observe each MUAP’s morphology, amplitude, and duration. Assess the recruitment pattern

Purpose for NCS/EMG Determine the type of neuromuscular disease Determine the lesion level Determine the timing of the lesion Determine the severity of the lesion

Urodynamic study Cystometry Sphincter electromyography Uroflometry Urethral pressure profile

Urodynamic study

Purpose for urodynamic study Evaluation the type of neurogenic bladder after CNS injury Uninhibited bladder Spastic bladder Flaccid bladder Determine the severity of stress urinary incontinence Determine the presence and severity of benign prostate hyperplasia

Cardiopulmonary exercise testing Evaluate the change of blood pressure, heart rate, and ventilation during graded exercise testing with increasing intensity Determine the anaerobic threshold by plotting of exercise testing Observe the peak exercise response. Determine the maximum oxygen consumption of the patient.

V-slope method for anaerobic threshold

Purposes for cardiopulmonary exercise testing For reference of exercise program prescription To evaluate the severity of cardiovascular disease and make suggestion for the intensity of activity of daily life or the necessity for medication modification or operation To evaluate responses to cardiopulmonary rehabilitation program