The nurse is assisting while a neurologist administers an edrophonium (Tensilon) test to a client with facial weakness and ptosis. If the test is positive for myasthenia gravis, which outcome would the nurse observe?
Thirty seconds after administration, the facial weakness and ptosis will be relieved for approximately 5 minutes.
After administration, the client will experience worsening facial weakness and ptosis.
After administration of the medication, there will be no change in the status of the ptosis or facial weakness.
The client will have elimination of symptoms lasting at least 24 hours after the administration of the medication.
The Correct Answer is A
This is the correct expected outcome if the test is positive for myasthenia gravis. Edrophonium works quickly to increase acetylcholine levels, leading to temporary improvement in muscle strength. In a patient with myasthenia gravis, administration of edrophonium typically results in a rapid improvement in symptoms like facial weakness and ptosis within 30 to 60 seconds, with the effects lasting for a few minutes. This brief improvement is indicative of a positive result for myasthenia gravis.
B.A Worsening symptoms after administration of edrophonium are not expected and could indicate an adverse reaction or incorrect diagnosis. In myasthenia gravis, edrophonium typically improves symptoms rather than worsening them.
C. No change in symptoms would be unexpected in the case of myasthenia gravis. If edrophonium is effective, there should be a noticeable improvement in symptoms. If there is no change, it might suggest a diagnosis other than myasthenia gravis or that the test is inconclusive.
D. This outcome is not expected. Edrophonium has a very short duration of action, typically relieving symptoms for only a few minutes. The effects do not last for 24 hours. A longer-lasting improvement might be observed with other treatments for myasthenia gravis, such as anticholinesterase medications like pyridostigmine, but not with edrophonium.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Elevated potassium levels (hyperkalemia) can occur in chronic kidney disease, as the kidneys struggle to excrete potassium. However, hyperkalemia does not typically cause visible crystals on the skin. It is more associated with cardiac arrhythmias and muscle weakness rather than skin manifestations.
B. Sodium imbalance is common in chronic kidney disease, often leading to fluid retention and hypertension. However, excess sodium does not result in crystal formation on the skin. Sodium issues are more related to fluid balance and blood pressure, not external crystalline deposits.
C. Urea is a waste product formed from the breakdown of proteins and is normally excreted by the kidneys. In chronic kidney disease, urea accumulates in the blood (uremia) because the kidneys cannot effectively filter it out. Urea can be deposited on the skin and form crystals, leading to a condition known as "uremic frost." This is often observed on the forehead or other areas of the skin and is a direct result of excess urea in the body.
D. Creatinine is another waste product filtered by the kidneys. Elevated levels indicate impaired kidney function, but creatinine itself does not form visible crystals on the skin. Elevated creatinine levels are primarily used as an indicator of kidney function rather than a cause of external skin manifestations.
Correct Answer is D
Explanation
A. Peptic ulcers are sores that develop on the lining of the stomach, small intestine, or esophagus due to the erosion caused by stomach acid. A Mallory-Weiss tear is not related to peptic ulcers. Instead, it results from a different type of injury related to forceful vomiting or retching.
B. Chewable aspirin is not a treatment for Mallory-Weiss tears. In fact, aspirin can exacerbate bleeding and is typically avoided in situations where gastrointestinal bleeding is present. Mallory-Weiss tears are generally managed by supportive measures and sometimes endoscopic interventions, not with aspirin.
C. A Mallory-Weiss tear specifically affects the mucosal lining at the junction of the esophagus and the stomach, not the duodenum. The duodenum is part of the small intestine, and tears or bleeding here are not characteristic of Mallory-Weiss syndrome.
D. A Mallory-Weiss tear is a tear or laceration in the mucosal lining at the gastroesophageal junction (where the esophagus meets the stomach). It is typically caused by severe vomiting or retching, which can lead to the tear and subsequent upper gastrointestinal bleeding.
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