Is it safe to conduct a spinal tap between L1 and L2?

Why is a spinal tap done below L2?

The insertion of a needle under local anaesthetic requires careful positioning to prevent injury to the spinal cord. Since the spinal cord ends as a solid structure around the level of the second lumbar vertebra (L2) the insertion of a needle must be below this point, usually between L3 and L4 (Fig 2).

What is the purpose of performing a lumbar puncture below the level of l1?

The main reason for a lumbar puncture is to help diagnose diseases of the central nervous system, including the brain and spine. Examples of these conditions include meningitis and subarachnoid hemorrhage. It may also be used therapeutically in some conditions.

What diseases can be found in spinal fluid?

Diseases detected by CSF analysis

  • meningitis.
  • encephalitis.
  • tuberculosis.
  • fungal infections.
  • West Nile virus.
  • eastern equine encephalitis virus (EEEV)

What diseases can be diagnosed with a lumbar puncture?

A lumbar puncture procedure may be helpful in diagnosing many diseases and disorders, including:

  • Meningitis. …
  • Encephalitis. …
  • Certain cancers involving the brain and spinal cord.
  • Bleeding in the area between the brain and the tissues that cover it (subarachnoid space)
  • Reye syndrome. …
  • Myelitis. …
  • Neurosyphilis.
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How long are you on bed rest after a lumbar puncture?

The duty physician advises you that the patient will require four hours bed rest after the lumbar puncture.

At what level lumbar puncture is done and why?

In approximately 94% of individuals the spinal cord terminates at the level of the L1 vertebrae. In the further 6% of individuals the spinal cord can extend to the L2-L3 interspace. Therefore a lumbar puncture is generally performed at or below the L3-L4 interspace.

What is the normal opening pressure of a lumbar puncture?

Opening pressure: 10-20 cm H2 O.

What level should a lumbar puncture be?

A diagnostic Lumbar Puncture should be performed at the L3/4 interspinal space, marked ‘x’. The approximate distance from the skin to the epidural space is 45-55mm and the dura mater may be up to 7mm beyond that depth.

What are the contraindications of lumbar puncture?

Contraindications. Absolute contraindications for performing a LP include infected skin over the puncture site, increased intracranial pressure (ICP) from any space-occupying lesion (mass, abscess), and trauma or mass to lumbar vertebrae.

What are the possible complications of a lumbar puncture?

When spinal fluid is removed during an LP, the risks include headache from a persistent spinal fluid leak, brain herniation, bleeding, and infection. Each of these complications are uncommon with the exception of headache, which can appear from hours to up to a day after a lumbar puncture.

Your podiatrist