NSG 550 - Diagnostic Reasoning for Nurse Practitioners Exam 3 Question: Acetylcholine receptor antib ody test Answer: Used to diagnose acquired myasthenia gravis and monitor pt response to immunosuppressive therapy. MG is an autoimmune disease caused by antibodies that block or destroy receptors for Ach. MG s/s=muscle weakness and fatigue Question: Cholinesterase Answer: Identify patients with PChE deficiency before anesthesia or to identify those who maybe have been exposed to phosphate poisoning. Also performed on an amniotic fluid to identify neural tube defects. Question: EEG Answer: electrodia gnostic: graphical record of brain wave activity obtained through electrodes placed on the scalp and forehead. Evaluates for seizure, tumors, infarcts, brain death (coma). Question: Caloric study Answer: electrodiagnostic: Used to evaluate function of CN VIII (vestibulocochlear). Can indicate disease in temporal portion of the cerebrum. Part of a complete neuro examination. Done by a neurologist. Differentiates abnormalities of the vestibular system, brainstem, and cerebellum. Question: Electromyography (EMG) Answer: recording the strength of a muscle contraction as a result of electrical stimulation. Can identify primary muscle diseases and differentiate them from primary neurologic pathologic conditions. Question: Nerve Conduction Study Answer: Perfo rmed to identify peripheral nerve injury in pts localized or diffuse weakness, muscle atrophy, dysesthesia, paresthesia, and neurologic pain. Differentiates primary peripheral nerve disease from muscular injury. Question: Evoked Potential Studies Answer: Indicated for patients who have a suspected sensory deficit but are unable to indicate or are unreliable indicating recognition of a stimulus (infants, comatose pts, noncommunicative pts, malingering pts). Used to monitor natural progression or treatment of deteriorating neurologic diseases like MS. Question: Lumbar puncture Answer: Fluid study: performed on pts who become increasingly demented and confused. It is a test used to help diagnose Alzheimer's disease and other forms of senile dementia.
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