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Spinal Tap

Spinal Tap Introduction

Patient Comments
  • A spinal tap is a procedure performed when a doctor or health care professional needs to evaluate the cerebrospinal fluid (also known as spinal fluid or CSF). Spinal tap is also referred to as a lumbar puncture, or LP.
  • Some of the reasons your doctor may want to do a spinal tap include the following:
    • To look for infection (bacteria can be found in the spinal fluid)
    • To check to see if there is bleeding around the brain (subarachnoid hemorrhage; small amounts of blood will be found in the fluid)
    • To look for causes of unexplained seizures
    • To look for causes of headaches
    • To evaluate for uncommon diagnoses such as multiple sclerosis, Lyme disease, Guillain-Barré syndrome, and several others.
    • To administer certain types of chemotherapeutics medications in the treatment of some cancers
  • Cerebrospinal fluid is a liquid that bathes the brain and spinal cord. An adult has about 140 mL (just under 5 oz) of spinal fluid. Typically, an adult makes 30-100 mL of spinal fluid daily.
  • A spinal tap can be performed in any person and at any age.
Medically Reviewed by a Doctor on 11/13/2014
Medical Author:

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Patient Comments & Reviews

The eMedicineHealth doctors ask about Spinal Tap:

Spinal Tap - Patient Experience

Did you receive a spinal tap? Please describe your experience.

Spinal Tap - Causes

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Read What Your Physician is Reading on Medscape

Lumbar Puncture (CSF Examination) »

Cerebrospinal fluid (CSF) was first examined in the 19th century using primitive techniques (eg, sharpened bird quills).

Read More on Medscape Reference »


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