A patient's heart rate increased from 94 to 164 beats/min. What will the nurse expect as a result?
Decrease in hemoglobin level
Increase in diastolic filling time
Increase in stroke volume
Decrease in cardiac output
The Correct Answer is D
A. An increase in heart rate does not directly affect hemoglobin levels; this option is incorrect.
B. A higher heart rate decreases diastolic filling time, as there is less time for the heart to fill between beats, which can lead to reduced stroke volume.
C. An increased heart rate does not inherently increase stroke volume; in fact, at very high rates, stroke volume can decrease due to reduced filling time.
D. The significant increase in heart rate to 164 beats/min can lead to decreased cardiac output due to compromised diastolic filling and reduced stroke volume.
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Correct Answer is ["A","B","C","D","F"]
Explanation
A. Applying knowledge of disease processes is essential in preventing the spread of infections and understanding transmission routes.
B. Proper disposal of supplies is crucial in minimizing the risk of cross-contamination and infection spread.
C. Checking the negative-pressure system is critical to ensure it functions properly to contain airborne pathogens.
D. Hand hygiene is a key practice in preventing infection and should be performed before and after patient contact in both scenarios.
E. This statement is misleading; while some precautions may overlap, there are specific differences that must be addressed in interventions for airborne versus contact precautions.
F. It is important for patients in airborne precautions to wear a mask during transportation to prevent the spread of infectious particles.
Correct Answer is C
Explanation
A. Weak quadriceps muscles can occur with electrolyte imbalances, but the provided values do not indicate hypokalemia or other issues causing muscle weakness.
B. Decreased deep tendon reflexes are generally associated with elevated calcium levels or other electrolyte disturbances but are not specifically indicated by the given lab values.
C. A calcium level of 4.5 mg/dL is significantly low (normal range is typically around 8.5-10.5 mg/dL), which can lead to hypocalcemia symptoms such as tingling of the extremities and tetany due to increased neuromuscular excitability.
D. Light-headedness when standing up (orthostatic hypotension) is more related to fluid volume status or dehydration rather than directly related to the given electrolyte levels.