How much is lumbar puncture

Cerebrospinal fluid is a colorless and transparent liquid that fills the ventricles, the subarachnoid space and the central canal of the spinal cord. It has protective, supportive and nutritional effects on the brain and spinal cord. Cerebrospinal fluid is produced in the choroid plexus of each ventricle, mainly the choroid plexus of the lateral ventricle. The average adult cerebrospinal fluid is 150 milliliters, and the rate of production is 0.3 to 0.5 milliliters per minute, which is about 500 milliliters per day. Almost all of the cerebrospinal fluid produced by the human body is absorbed by the human body and reaches a state of equilibrium. Lumbar puncture usually only extracts a few milliliters to a dozen milliliters of cerebrospinal fluid, which has little effect on the human body.

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