A nurse is administering a daily dose of vancomycin at 10:00 AM. At which time should the nurse obtain the patient's blood sample to determine the trough level?
8:00 AM
11:00 AM
9:00 AM
12:00 noon
The Correct Answer is C
A. 8:00 AM: This time is too early to draw a trough level for a medication administered at 10:00 AM. The trough level should be drawn just before the next dose is given to get the lowest concentration in the bloodstream.
B. 11:00 AM: This time is after the scheduled dose of vancomycin at 10:00 AM. Waiting until 11:00 AM would not provide an accurate trough level because the patient has already received the medication.
C. 9:00 AM: This is the correct time to obtain the patient's blood sample. It is one hour before the scheduled dose of vancomycin at 10:00 AM. Drawing the trough level at this time ensures it reflects the lowest concentration of the drug in the bloodstream.
D. 12:00 noon: This time is after the scheduled dose of vancomycin at 10:00 AM. Waiting until noon would not provide an accurate trough level because the patient has already received the medication.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. "Bactericidal and bacteriostatic are used interchangeably."
Explanation: This statement is incorrect. Bactericidal and bacteriostatic are two distinct categories of antibiotics with different mechanisms of action.
B. "Bactericidal drugs are directly lethal to bacteria, and bacteriostatic drugs work to slow bacterial growth but do not cause cell death."
Explanation: This statement is correct. Bactericidal drugs kill bacteria directly, leading to their death, while bacteriostatic drugs inhibit bacterial growth without causing immediate cell death.
C. "Bacteriostatic drugs are directly lethal to bacteria, and bactericidal drugs work to slow bacterial growth but do not cause cell death."
Explanation: This statement is incorrect. It is the opposite of the correct explanation. Bacteriostatic drugs do not directly kill bacteria, and bactericidal drugs do cause bacterial death.
D. "A bactericidal drug can cause death to the host, whereas a bacteriostatic drug only affects bacteria."
Explanation: This statement is not entirely accurate. While some bactericidal drugs can be more toxic to the host, it depends on the specific drug and its dosage. Bacteriostatic drugs, on the other hand, generally do not directly harm the host. The primary distinction between the two categories is their impact on bacterial growth and survival.
Correct Answer is A
Explanation
A. IgG: Immunoglobulin G (IgG) is the most abundant antibody in the bloodstream and represents about 75% of all the antibodies in the body. It provides long-term immunity because it can persist in the bloodstream for a long time. IgG antibodies are involved in secondary immune responses and are capable of crossing the placenta, providing passive immunity to newborns.
B. IgE: Immunoglobulin E (IgE) is associated mainly with allergic reactions. When the body is exposed to an allergen, it triggers the release of IgE, leading to the symptoms of an allergic response, such as sneezing or itching.
C. IgM: Immunoglobulin M (IgM) is the largest antibody and is usually the first antibody produced during an initial exposure to an antigen. It is particularly effective at agglutination (clumping together) of pathogens.
D. IgA: Immunoglobulin A (IgA) is found in high concentrations in mucous membranes, particularly those lining the respiratory passages and gastrointestinal tract. It provides localized defense against pathogens. IgA antibodies are also found in saliva, tears, and breast milk, providing immunity to infants.
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