A nurse is caring for a client who has a new diagnosis of amyotrophic lateral sclerosis (ALS), and a new prescription for riluzole. The nurse understands that this medication works in which of the following ways?
It suppresses the virus which is responsible for causing the inflammation of the nerve.
It prevents the breakdown of acetylcholine to increase the amount available at the neuromuscular junction.
It reduces inflammation in the CNS to prevent further demyelination of nerves in the central nervous system.
It slows the progression of the disease by decreasing the release of glutamate in the brain.
The Correct Answer is D
A. ALS is not caused by a virus or inflammation of the nerves. It is a progressive neurodegenerative disease affecting the motor neurons in the brain and spinal cord.
B. While acetylcholine breakdown is involved in other neurological conditions (such as myasthenia gravis), ALS primarily affects motor neurons and does not directly involve acetylcholine metabolism at the neuromuscular junction.
C. ALS does not typically involve significant inflammation or demyelination (which is more characteristic of conditions like multiple sclerosis). Therefore, reducing CNS inflammation is not a therapeutic target in ALS.
D. Riluzole, the medication prescribed for ALS, works by decreasing the release of glutamate, which is a neurotransmitter that can be toxic to nerve cells in high amounts. In ALS, excessive glutamate release is believed to contribute to motor neuron degeneration. By reducing glutamate release, riluzole may help protect motor neurons and slow the progression of the disease.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Hypernatremia can indicate dehydration or other electrolyte imbalances. Furosemide can further affect electrolyte balance, especially sodium and potassium. However, this sodium level is only slightly elevated and may not necessarily require immediate action regarding furosemide administration.
B. Furosemide is a diuretic that can further decrease blood pressure due to its effects on fluid volume reduction. Administering it to a patient with already low blood pressure could potentially lead to significant hypotension and compromise perfusion to vital organs.
C. While incontinence itself may not directly contraindicate furosemide administration, it could indicate underlying issues such as bladder dysfunction or fluid overload that need further evaluation. This finding alone would not necessarily require holding the medication, but it warrants further assessment and consideration in the clinical context.
D. Normal serum potassium levels typically range from 3.5-5.0 mEq/L. A level of 5.3 mEq/L indicates hyperkalemia (elevated potassium). While this potassium level is mildly elevated, it would not be a reason on its own to hold furosemide. Monitoring potassium levels closely and potentially adjusting potassium
Correct Answer is C
Explanation
A. The soles of the feet are not typically assessed for cyanosis because they are not a reliable indicator of central cyanosis. Cyanosis is best evaluated in areas where mucous membranes are visible.
B. Similar to the soles of the feet, the palms of the hands are not a reliable indicator of central cyanosis. Cyanosis is not typically visible on the palms unless there are severe systemic circulation issues.
C. The oral mucosa (inside the mouth) is a reliable area to assess for central cyanosis. The nurse can inspect the lips, tongue, and buccal mucosa for a bluish discoloration, which indicates decreased arterial oxygen saturation.
D. The nail beds are also a reliable indicator of central cyanosis. The nurse can assess the color of the nail beds and look for bluish discoloration, which can be more apparent in darker-skinned individuals compared to the lips and oral mucosa.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today