Nokea
The nurse is caring for a patient who is unconscious with a traumatic head injury and has a blood pressure of 72 mm Hg, and an intracranial pressure of 22 mm Hg. What is the cerebral perfusion pressure (CPP)?
- A. 50 mm Hg
- B. 94 mm Hg
- C. 72 mm Hg
- D. 22 mm Hg
Correct Answer: A
Rationale: The formula for cerebral perfusion pressure (CPP) is CPP = MAP - ICP, where MAP (mean arterial pressure) is calculated as (SBP + 2*DBP)/3. Given BP of 72 mm Hg (assuming this is the MAP as the question implies a single value), and ICP of 22 mm Hg, CPP = 72 - 22 = 50 mm Hg.
You may also like to solve these questions
Which of the following assessment information should the nurse collect to determine whether a patient is developing post-concussion syndrome?
- A. Muscle resistance
- B. Short-term memory
- C. Glasgow Coma Scale
- D. Pupil reaction to light
Correct Answer: B
Rationale: Decreased short-term memory is one indication of post-concussion syndrome. The other data may be assessed but are not indications of post-concussion syndrome.
A patient who is unconscious has a nursing diagnosis of ineffective cerebral tissue perfusion related to cerebral tissue swelling. Which of the following nursing interventions should be included in the plan of care?
- A. Keep the head of the bed elevated to 30 degrees.
- B. Position the patient with the knees and hips flexed.
- C. Encourage coughing and deep breathing to improve oxygenation.
- D. Cluster nursing interventions to provide uninterrupted rest periods.
Correct Answer: A
Rationale: The patient with increased intracranial pressure (ICP) should be maintained in the head-up position to help reduce ICP. Flexion of the hips and knees increases abdominal pressure, which increases ICP. Because the stimulation associated with nursing interventions increases ICP, clustering interventions will progressively elevate ICP. Coughing increases intrathoracic pressure and ICP.
The nurse is providing discharge teaching with a patient who has a concussion. Which of the following time frames should the nurse tell the patient to continue to monitor for post-concussion syndrome?
- A. Up to 2 weeks
- B. Up to 4 weeks
- C. Up to 2 months
- D. Up to 6 months
Correct Answer: C
Rationale: Post-concussion syndrome is seen anywhere from 2 weeks to 2 months after the concussion. Symptoms include persistent headache, lethargy, personality and behavioural changes, shortened attention span, decreased short-term memory, and changes in intellectual ability. This syndrome can significantly affect the patient's abilities to perform the activities of daily living.
A patient who is suspected of having an epidural hematoma is admitted to the emergency department. Which of the following actions should the nurse plan to take?
- A. Administer IV furosemide
- B. Initiate high-dose barbiturate therapy
- C. Type and crossmatch for blood transfusion
- D. Prepare the patient for immediate craniotomy.
Correct Answer: D
Rationale: The principal treatment for epidural hematoma is rapid surgery to remove the hematoma and prevent hematoma. If intracranial pressure (ICP) is elevated after surgery, furosemide or high-dose barbiturate therapy may be needed, but these will not be of benefit unless the hematoma is removed. Minimal blood loss occurs with head injuries, and transfusion is usually not necessary.
Which of the following assessment findings in a patient who was admitted the previous day with a basilar skull fracture is most important to report to the health care provider?
- A. Bruising under both eyes
- B. Complaint of severe headache
- C. Large ecchymosis behind one ear
- D. Temperature of 38.6°C (101.5°F)
Correct Answer: D
Rationale: Patients who have basilar skull fractures are at risk for meningitis, so the elevated temperature should be reported to the health care provider. The other findings are typical of a patient with a basilar skull fracture.