Question

A healthy person with a blood glucose of 80 mg\dL (4.4 mmol\L) would have a simultaneously determined cerebrospinal fluid glucose value of:

a. 25 mg\dL (1.4 mmol\L)
b. 50 mg\dL (2.3 mmol\L)
c. 100 mg\dL (5.5 mmol\L)
d. 150 mg\dL (8.3 mmol\L)

Answer 1

The CSF glucose value for a healthy person with a blood glucose of 80 mg/dL is likely to be around 50 mg/dL (2.7 mmol/L), which aligns with normal CSF glucose levels that are typically less than plasma levels.

Step-by-step explanation:

The student asked what the cerebrospinal fluid (CSF) glucose value would be in a healthy person with a blood glucose level of 80 mg/dL (4.4 mmol/L).

The glucose content of CSF is typically 50-85 mg/100 ml, which is less than the plasma level. Considering that the blood glucose value provided falls within the normal fasting range, which according to the reference is maintained between 70 to 110 mg/dL, the corresponding CSF glucose value would also be anticipated to fall within normal limits. Therefore, in relation to the provided options, the correct answer would be b.

50 mg/dL (2.7 mmol/L), which is within the normal CSF glucose range and proportionally less than the plasma glucose level.