Final answer:
The cerebral perfusion pressure is calculated by subtracting the intracranial pressure from the mean arterial pressure.
Step-by-step explanation:
The cerebral perfusion pressure (CPP) is calculated using the following formula:
CPP = Mean Arterial Pressure (MAP) - Intracranial Pressure (ICP)
To calculate the MAP, we can use the formula:
MAP = (2 x diastolic pressure) + systolic pressure / 3
Let's substitute the values into the formulas:
MAP = (2 x 70) + 130 / 3 = 90
CPP = 90 - 18 = 72 mmHg
Therefore, the cerebral perfusion pressure for the patient is 72 mmHg.