ADN 520: ICP Questions with 100%
Correct Answers
What are three components that influence ICP? Correct Answer: - Brain tissue
- Blood
- CSF
What is ICP? Correct Answer: - Pressure exerted in the cranium
- Normal: 7 to 10, but 15 is okay
How do you monitor ICP? Correct Answer: - Invasive monitoring done in the ER
or ICU
- Intraventricular catheter
- Subarachnoid screw or bolt
- Epidural or subdural sensor
What is cerebral perfusion pressure or CPP? Correct Answer: - Blood flow from
the systemic circulation needed to provide oxygen and glucose for brain
metabolism
- Pressure needed to perfuse the brain with oxygen and glucose
How is CPP calculated? Correct Answer: - MAP-ICP
What happens to the CPP when ICP is elevated? Correct Answer: - It decreases
because there is more resistance for blood to get into the brain
, Explain how cerebral perfusion pressure and ICP influence cerebral blood flow.
Correct Answer: - When ICP is high, cerebral perfusion is impaired and the
oxygen concentration to the brain is decreased
- Increased CO2 due to decreased CO2= increased ICP
What are normal factors that influence ICP? Correct Answer: - Arterial and
venous pressure: increased BP= increased ICP
- Intra-abdominal and intra- thoracic pressure: do not strain to have BM,
vomiting, no cough and deep breathing
- Posture: HOB 30 degrees to promote drainage, not flat because ICP will
increase, not sitting up because heart cannot pump blood to brain
- Temp: increased temp=increased metabolic demand= more work for brain
- Blood gases: CO2
What other abnormal factors may affect ICP? Correct Answer: - Head trauma
- Brain tumors
- Strokes
- Toxic and viral encephalopathies
- Edema
- Hydrocephalus
- Inflammation (meningitis)
Correct Answers
What are three components that influence ICP? Correct Answer: - Brain tissue
- Blood
- CSF
What is ICP? Correct Answer: - Pressure exerted in the cranium
- Normal: 7 to 10, but 15 is okay
How do you monitor ICP? Correct Answer: - Invasive monitoring done in the ER
or ICU
- Intraventricular catheter
- Subarachnoid screw or bolt
- Epidural or subdural sensor
What is cerebral perfusion pressure or CPP? Correct Answer: - Blood flow from
the systemic circulation needed to provide oxygen and glucose for brain
metabolism
- Pressure needed to perfuse the brain with oxygen and glucose
How is CPP calculated? Correct Answer: - MAP-ICP
What happens to the CPP when ICP is elevated? Correct Answer: - It decreases
because there is more resistance for blood to get into the brain
, Explain how cerebral perfusion pressure and ICP influence cerebral blood flow.
Correct Answer: - When ICP is high, cerebral perfusion is impaired and the
oxygen concentration to the brain is decreased
- Increased CO2 due to decreased CO2= increased ICP
What are normal factors that influence ICP? Correct Answer: - Arterial and
venous pressure: increased BP= increased ICP
- Intra-abdominal and intra- thoracic pressure: do not strain to have BM,
vomiting, no cough and deep breathing
- Posture: HOB 30 degrees to promote drainage, not flat because ICP will
increase, not sitting up because heart cannot pump blood to brain
- Temp: increased temp=increased metabolic demand= more work for brain
- Blood gases: CO2
What other abnormal factors may affect ICP? Correct Answer: - Head trauma
- Brain tumors
- Strokes
- Toxic and viral encephalopathies
- Edema
- Hydrocephalus
- Inflammation (meningitis)
