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 C
Explanation
A. A barrel chest is a common finding in patients with emphysema due to lung hyperinflation but is not immediately life-threatening.
B. A respiratory rate of 22 per minute indicates mild tachypnea, which can be expected in patients with COPD, but is not the most alarming sign.
C. Oral cyanosis is a concerning sign that indicates inadequate oxygenation and can suggest severe respiratory distress or failure, necessitating immediate intervention.
D. Decreased lung sounds on expiration can occur in emphysema but is not as critical as the presence of cyanosis.
E. Pursed-lip expiration is a compensatory mechanism used by patients with COPD to improve breathing efficiency; it is generally a positive adaptive strategy.
Correct Answer is C
Explanation
A. Supine is not recommended, as it can make breathing more difficult by limiting chest expansion.
B. Trendelenberg is not suitable for someone with breathing difficulties, as this position can worsen dyspnea.
C. High-Fowler is the best position for an asthma patient experiencing shortness of breath as it promotes lung expansion and allows for maximum chest wall movement.
D. Semi-Fowler may help but is less effective than High-Fowler in cases of acute respiratory distress.
E. Left-lateral does not optimize chest expansion and is not typically recommended for respiratory distress.