A nurse is teaching a class about pharmacodynamics.
The nurse should include that which of the following medication levels occurs when a medication is at the lowest serum concentration?
Toxic.
Peak.
Trough.
Half-life.
The Correct Answer is C
Choice A rationale
Toxic levels refer to concentrations of a medication that are high enough to cause harmful effects or poisoning. This is not related to the lowest serum concentration.
Choice B rationale
Peak levels are the highest concentration of a medication in the bloodstream after administration. This occurs after the drug is absorbed and distributed.
Choice C rationale
Trough levels occur when the medication is at its lowest concentration in the bloodstream, typically just before the next dose is due. Monitoring trough levels helps ensure therapeutic effectiveness while avoiding toxicity.
Choice D rationale
Half-life refers to the time it takes for the concentration of a drug in the bloodstream to decrease by half. It is not directly related to the lowest serum concentration at a specific point in time.
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View Related questions
Correct Answer is D
Explanation
Choice A rationale
Instilling ophthalmic medication directly on the cornea can cause irritation and discomfort. Medications should be administered in the conjunctival sac.
Choice B rationale
Asking the client to tightly squeeze their eyes shut after instillation can expel the medication, reducing its effectiveness. Gentle closing of the eyes is recommended.
Choice C rationale
Cleaning the eye from the outer canthus to the inner canthus is not the proper method. The correct method is to clean from the inner canthus to the outer canthus to avoid contaminating the inner eye.
Choice D rationale
Applying pressure to the nasolacrimal duct after instillation helps prevent the medication from draining into the nasolacrimal system, ensuring better absorption in the eye.
Correct Answer is A
Explanation
Choice A rationale
Neobladder urinary diversion involves creating an internal reservoir or pouch from a segment of the intestine to store urine. This new bladder is then connected to the urethra,
enabling the client to void through the urethra. This method closely mimics natural urination, allowing the client to have some control over urination.
Choice B rationale
This is incorrect because a neobladder is designed to allow the client to control urination. While there might be a learning curve for the client to adapt to the new bladder, the ultimate
goal is to achieve continence.
Choice C rationale
This describes an ileal conduit, another type of urinary diversion, where a stoma is created on the abdomen for urine to pass into an external bag. The neobladder does not involve a
stoma for urination.
Choice D rationale
This is incorrect as it pertains to an ileal conduit or urostomy. Clients with a neobladder do not require an external collection bag since urine is stored internally in the constructed
bladder and can be passed through the urethra. .