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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Correct Answer is C
Explanation
Choice A rationale
Returning the opened medication to the medication cart is inappropriate because once a medication is opened and refused by a client, it must be disposed of properly. This action helps maintain safety and prevents contamination.
Choice B rationale
Reporting the incident to the provider is not necessary in this context as the refusal to take medication can be managed by the nurse by following the facility's protocol.
Choice C rationale
Filling out an incident report is required because the client's refusal to take the medication is considered a significant event. Incident reports are used to document and analyze such events to improve patient care and safety.
Choice D rationale
Notifying the facility's ethics committee is unnecessary for a medication refusal incident, as it does not involve an ethical dilemma requiring their intervention.
Correct Answer is A
Explanation
Choice A rationale
Colonoscopy is the recommended test for screening for rectal cancer. It allows for direct visualization of the entire colon and rectum, enabling the detection and biopsy of polyps or
suspicious lesions. It is the gold standard for colorectal cancer screening.
Choice B rationale
Endoscopic retrograde cholangiopancreatography (ERCP) is used to diagnose and treat conditions of the bile ducts, pancreas, and gallbladder. It’s not typically used for colorectal
cancer screening.
Choice C rationale
An upper GI series involves X-rays of the upper gastrointestinal tract (esophagus, stomach, and duodenum) after swallowing a contrast medium. This test does not visualize the
lower GI tract, including the colon and rectum, and is therefore not suitable for rectal cancer screening.
Choice D rationale
Upper GI endoscopy allows for direct visualization of the upper gastrointestinal tract but does not reach the colon and rectum. Hence, it is not used for screening rectal cancer