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.
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Correct Answer is C
Explanation
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.
Correct Answer is B
Explanation
A. Gut-associated lymphoid tissue (GALT): GALT is a component of the mucosa-associated lymphoid tissue (MALT) and refers to the immune cells found in the gastrointestinal tract. These cells play a significant role in local immune responses in the gut.
B. Bone marrow: The bone marrow is the primary site of blood cell production in the body. It contains stem cells that can differentiate into various blood cells, including B cells. B cells mature in the bone marrow.
C. Thymus: The thymus is an organ located near the heart and is crucial for the development of T cells. T cells mature in the thymus, where they learn to recognize self from non-self antigens.
D. Lymph nodes: Lymph nodes are small, bean-shaped structures that produce and store cells that help fight infection. While they are essential parts of the immune system, B and T cells are not originally derived from lymph nodes.
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