A nurse is caring for a client who has sustained a neurologic injury with increased intracranial pressure and decreased cerebral perfusion.
Which of the following will maintain cerebral perfusion pressure constant?
Regulation of the amount of carbon dioxide exhaled
Regulation of catecholamines circulating throughout the body
Regulation of how much blood is pumped from the heart
Regulation of constriction and dilation of blood vessels in the brain
The Correct Answer is D
Choice A rationale
Regulation of the amount of carbon dioxide exhaled can affect cerebral blood flow, but it does not directly maintain cerebral perfusion pressure constant.
Choice B rationale
Catecholamines circulating throughout the body can affect blood pressure and heart rate, but they do not directly maintain cerebral perfusion pressure constant.
Choice C rationale
How much blood is pumped from the heart, also known as cardiac output, can affect cerebral perfusion pressure. However, it does not directly maintain cerebral perfusion pressure constant.
Choice D rationale
Regulation of constriction and dilation of blood vessels in the brain, also known as cerebral autoregulation, is a key mechanism that maintains cerebral perfusion pressure constant. When pressure autoregulation is impaired, cerebral blood flow becomes dependent on cerebral perfusion pressure.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Cognitive behavioral therapy (CBT) is a type of psychological treatment that can be effective for a range of conditions, including chronic pain. However, it may not be the most suitable for acute pain management at home following a knee injury. CBT usually involves working with a trained therapist over multiple sessions, which may not be practical or immediately beneficial in this context.
Choice B rationale
Intermittent ice compress is a highly recommended non-pharmacological method for managing acute pain, especially following a knee injury. The cold temperature from the ice can help numb the area, reducing pain and inflammation. It’s a simple, cost-effective, and readily available method that can be easily applied at home.
Choice C rationale
Phototherapy, also known as light therapy, involves exposure to specific wavelengths of light using polychromatic polarised light, lasers, light-emitting diodes, fluorescent lamps, or dichroic lamps. While it has been used to treat conditions like seasonal affective disorder, skin conditions, and neonatal jaundice, its effectiveness in managing acute pain following a knee injury is not well-established.
Choice D rationale
Walking on a treadmill might not be suitable for a patient experiencing acute pain following a knee injury. Physical activity is generally beneficial for overall health and certain types of chronic pain. However, in the case of an acute knee injury, rest and immobilization are often recommended initially to allow the injured tissues to heal.
Correct Answer is D
Explanation
Choice A rationale
Vision loss and depression are not typically symptoms of a mild traumatic brain injury (TBI). Vision loss could be a symptom of a more severe TBI or other neurological conditions.
Depression, while it can occur following a TBI, is not a direct symptom of the injury itself but rather a common psychological reaction to the changes and challenges that a person may face following the injury.
Choice B rationale
Seizures and weakness in the extremities can be symptoms of a TBI, but they are more commonly associated with moderate to severe TBIs. Mild TBIs do not typically cause seizures or weakness in the extremities.
Choice C rationale
Persistent headache can be a symptom of a mild TBI. However, aggressive behavior, while it can occur following a TBI, is not a direct symptom of the injury itself but rather a possible psychological reaction to the changes and challenges that a person may face following the injury.
Choice D rationale
Headache and confusion are common symptoms of a mild TBI. After a mild TBI, individuals may experience a headache or a feeling of pressure in the head. They may also experience confusion or feel as if in a fog.
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