CSF Glucose

Question 1

What is the typical range for CSF glucose levels in relation to plasma glucose levels?

Answer 1

• CSF glucose levels are typically 60-70% of plasma glucose levels.

Question 2

What is the significance of the CSF Glucose level being lower than the Plasma Glucose level?

Answer 2

• The lower CSF Glucose level (65 mg/dL)
• Compared to the Plasma Glucose level (100 mg/dL)

Question 3

When should blood glucose be drawn in relation to a Lumbar Tap (CSF)?

Answer 3

• Blood glucose should be drawn 2 HOURS prior to the Lumbar Tap (CSF).

Question 4

What is the clinical significance of CSF glucose levels?

Answer 4

• CSF glucose levels can help determine the cause of meningitis.

Question 5

What does an increase in CSF glucose levels typically indicate?

Answer 5

• Increased CSF glucose levels are always a result of elevated plasma glucose levels.

Question 6

What causes a decrease in CSF glucose levels?

Answer 6

• Decreased CSF glucose levels can be caused by alterations in transport across the blood-brain barrier (BBB) and increased utilization by brain cells.