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 C
Explanation
Choice A Reason:
Elevating the client's head on two pillows can help reduce ICP by promoting venous drainage from the brain. However, it is important to ensure that the head is not elevated too high, as this can impede venous return and potentially increase ICP. The recommended elevation is typically 30 degrees. While this intervention is beneficial, it is not the most critical action compared to reducing environmental stimuli.
Choice B Reason:
Keeping the client well hydrated is essential for overall health, but excessive hydration can increase ICP by increasing the volume of cerebrospinal fluid and blood within the cranial vault. Fluid management must be carefully monitored to avoid exacerbating ICP. Therefore, while hydration is important, it must be balanced and not excessive.
Choice C Reason:
Decreasing the noise level in the client's room is crucial for minimizing external stimuli that can increase ICP. Noise and other environmental stressors can lead to increased agitation and stress, which in turn can elevate ICP. Creating a calm and quiet environment helps in maintaining a stable ICP and is a non-invasive, easily implementable intervention.
Choice D Reason:
Frequent suctioning of the endotracheal tube can cause transient increases in ICP due to the stimulation and potential for coughing. While suctioning is necessary to maintain airway patency, it should be performed judiciously and only when clinically indicated. Over-suctioning can lead to spikes in ICP and should be avoided.
Correct Answer is B
Explanation
Choice A Reason:
Core temperature is important to monitor in many clinical situations, but it is not the primary concern for a client with an abdominal aortic aneurysm. While fever can indicate infection, which is a potential complication, it is not directly related to the immediate risks associated with AAA.
Choice B Reason:
Blood pressure is the most critical vital sign to monitor in a client with an abdominal aortic aneurysm. Elevated blood pressure can increase the risk of aneurysm rupture, which is a life-threatening emergency. Maintaining blood pressure within a safe range is essential to prevent complications and ensure the stability of the aneurysm.
Choice C Reason:
Pulse rate is also important to monitor, but it is not as directly indicative of the risk of aneurysm rupture as blood pressure. While changes in pulse rate can signal cardiovascular stress or other issues, blood pressure provides more direct information about the forces acting on the aneurysm.
Choice D Reason:
Respiratory rate is a vital sign that can indicate respiratory distress or other systemic issues, but it is not the primary concern in the context of an abdominal aortic aneurysm. Blood pressure remains the most critical parameter to monitor to prevent rupture and manage the condition effectively.
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