5 doctors weighed in:

How much cerebro spinal fluid is removed during lumbar puncture ?

5 doctors weighed in
Dr. Larry Armstrong
Neurosurgery
2 doctors agree

In brief: 3-5 cc

Usually routine analysis necessitates between 3 to 5 cc.
This is about half a teaspoon to one teaspoon. Some conditions necessitate removing 2 teaspoons and in rare conditions such as hydrocephalus, 20-30 cc may be removed.

In brief: 3-5 cc

Usually routine analysis necessitates between 3 to 5 cc.
This is about half a teaspoon to one teaspoon. Some conditions necessitate removing 2 teaspoons and in rare conditions such as hydrocephalus, 20-30 cc may be removed.
Dr. Larry Armstrong
Dr. Larry Armstrong
Thank
Dr. Julian Bragg
Neurology
1 doctor agrees

In brief: Usually not much

For a typical diagnostic tap, a total volume of 20-25cc is typical (less than two tablespoons), but some tests, such as cytology, require larger amounts of fluid.
When doing a tap to reduce the CSF pressure (a therapeutic tap), much larger volumes can be removed.

In brief: Usually not much

For a typical diagnostic tap, a total volume of 20-25cc is typical (less than two tablespoons), but some tests, such as cytology, require larger amounts of fluid.
When doing a tap to reduce the CSF pressure (a therapeutic tap), much larger volumes can be removed.
Dr. Julian Bragg
Dr. Julian Bragg
Thank
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