Question

An unconscious patient with a traumatic head injury has a blood pressure of 130/76 mm Hg, and an intracranial pressure (ICP) of 20 mm Hg. The nurse will calculate the cerebral perfusion pressure (CPP) as ____ mm Hg.

A. 54
B. 50
C. 46
D. 40

Answer 1

The cerebral perfusion pressure (CPP) can be calculated using the formula CPP = Mean Arterial Pressure (MAP) - Intracranial Pressure (ICP). The Mean Arterial Pressure (MAP) can be calculated as (Systolic Blood Pressure + 2 x Diastolic Blood Pressure) / 3. Substituting the given values into the formulas, the calculated CPP is approximately 74.67 mm Hg.

Step-by-step explanation:

The cerebral perfusion pressure (CPP) can be calculated using the following formula:

CPP = Mean Arterial Pressure (MAP) - Intracranial Pressure (ICP)

In this case, the Mean Arterial Pressure (MAP) can be calculated as:

MAP = (Systolic Blood Pressure + 2 x Diastolic Blood Pressure) / 3

Using the given values:

Systolic Blood Pressure = 130 mm Hg

Diastolic Blood Pressure = 76 mm Hg

ICP = 20 mm Hg

Substituting these values into the formula:

MAP = (130 + 2 x 76) / 3 = 94.67 mm Hg

Finally, calculating the CPP:

CPP = 94.67 - 20 = 74.67 mm Hg

Therefore, the cerebral perfusion pressure (CPP) is approximately 74.67 mm Hg.