The nurse is asked to describe what the heart sound S1 represents. What would be the correct response by the nurse?
Closure of mitral and aortic valves
Closure of mitral and tricuspid valves
Closure of pulmonic and tricuspid valves
Closure of pulmonic and aortic valves
Closure of aortic and tricuspid valves
The Correct Answer is B
A. This option incorrectly includes the aortic valve rather than the tricuspid valve in the S1 heart sound.
B. S1 represents the closure of the mitral and tricuspid valves, which occurs at the beginning of ventricular systole and produces the "lub" sound.
C. The pulmonic valve closure is associated with the S2 heart sound, not S1.
D. The closure of the pulmonic and aortic valves occurs in S2, not S1.
E. This combination is incorrect, as S1 is associated with mitral and tricuspid valve closure.
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Correct Answer is E
Explanation
A. Calling another nurse for help is unnecessary unless additional assistance is required after initial interventions.
B. Giving pain medication as ordered may address the chest pain but does not address the immediate need for oxygenation.
C. Calling the admitting healthcare provider can be done later if symptoms do not improve, but the immediate priority is to improve oxygenation.
D. Telling the client to remain calm may help reduce anxiety but does not address the low oxygen saturation.
E. Applying oxygen via nasal cannula as ordered is the priority action to improve the client’s oxygen saturation and alleviate hypoxemia, which could be contributing to their chest pain.
Correct Answer is B
Explanation
A. This option incorrectly includes the aortic valve rather than the tricuspid valve in the S1 heart sound.
B. S1 represents the closure of the mitral and tricuspid valves, which occurs at the beginning of ventricular systole and produces the "lub" sound.
C. The pulmonic valve closure is associated with the S2 heart sound, not S1.
D. The closure of the pulmonic and aortic valves occurs in S2, not S1.
E. This combination is incorrect, as S1 is associated with mitral and tricuspid valve closure.