What measurement is the normal range for cardiac output in adults?
0.5-1 L/min
10-12 L/min
4-6 L/min
15-20 L/min
The Correct Answer is C
Choice A Reason:
The range of 0.5-1 L/min is significantly lower than the normal cardiac output for adults. Such low values could indicate severe heart failure or other critical conditions where the heart is unable to pump sufficient blood to meet the body's needs.
Choice B Reason:
A cardiac output of 10-12 L/min is higher than the normal range for adults at rest. This level of cardiac output might be seen during intense physical activity or in conditions like hyperthyroidism, where the heart pumps more blood to meet increased metabolic demands.
Choice C Reason:
The normal range for cardiac output in adults is typically between 4-6 L/min. This range represents the volume of blood the heart pumps per minute at rest, ensuring adequate perfusion of tissues and organs. Cardiac output can vary based on factors such as age, body size, and physical activity.
Choice D Reason:
A cardiac output of 15-20 L/min is extremely high and would generally be seen only during extreme physical exertion or in pathological conditions. Such high values are not typical for resting adults and indicate a state of increased cardiac demand.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.2"]
Explanation
Step-by-Step Calculation:
Step 1: Convert the client's weight from pounds to kilograms.
220 lbs ÷ 2.2 = 100 kg
Result = 100 kg
Step 2: Calculate the concentration of Lidocaine in mcg/mL.
750 mg × 1000 = 750,000 mcg
Result = 750,000 mcg
750,000 mcg ÷ 500 mL = 1500 mcg/mL
Result = 1500 mcg/mL
Step 3: Calculate the infusion rate in mcg/min.
5 mcg/min (prescribed dose)
Result = 5 mcg/min
Step 4: Calculate the infusion rate in mcg/hr.
5 mcg/min × 60 min/hr = 300 mcg/hr
Result = 300 mcg/hr
Step 5: Calculate the infusion rate in mL/hr.
300 mcg/hr ÷ 1500 mcg/mL = 0.2 mL/hr
Result = 0.2 mL/hr
Final Results:
- Infusion rate: 5 mcg/min
- Infusion rate: 300 mcg/hr
- Infusion rate: 0.2 mL/hr
Correct Answer is B
Explanation
Choice A Reason:
Pulmonary function tests are used to assess lung function and diagnose respiratory conditions such as asthma, chronic obstructive pulmonary disease (COPD), and other lung disorders. While heart failure can affect lung function, pulmonary function tests are not specifically used to diagnose heart failure.
Choice B Reason:
An electrocardiogram (ECG) is a common diagnostic test used to assess heart failure. It records the electrical activity of the heart and can detect abnormalities in heart rhythm, heart size, and the presence of ischemia or infarction. ECGs are crucial in diagnosing and monitoring heart conditions, including heart failure.
Choice C Reason:
Urinalysis is a test that examines the content of urine and is used to diagnose and monitor kidney function, urinary tract infections, and other metabolic conditions. It is not specifically used to diagnose heart failure, although kidney function can be affected by heart failure.
Choice D Reason:
A complete blood count (CBC) measures the levels of different blood cells, including red blood cells, white blood cells, and platelets. While a CBC can provide valuable information about a patient's overall health and detect conditions like anemia or infection, it is not specifically used to diagnose heart failure.
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