LP

LP or Lumbar Puncture is a medical procedure where a needle is inserted into the lower part of the spine, known as the lumbar region, to collect a sample of cerebrospinal fluid (CSF). The CSF is the fluid that surrounds the brain and spinal cord, providing a protective cushion and carrying nutrients.

Procedure

The patient is usually positioned on their side with their knees drawn up to their chest, or they may be seated and leaning forward. The skin over the lumbar spine is cleaned and a local anesthetic is applied to numb the area. A thin, hollow needle is then inserted between two vertebrae in the lower spine, into the space filled with CSF. The fluid is collected in a small vial for testing.

Uses

A lumbar puncture is often performed to diagnose conditions affecting the brain and spinal cord, including meningitis, encephalitis, multiple sclerosis, and Guillain-Barré syndrome. It can also be used to measure the pressure of the CSF, which can be elevated in conditions such as hydrocephalus and idiopathic intracranial hypertension.

Risks and Complications

While a lumbar puncture is generally safe, it can occasionally cause complications. These can include headache, infection, bleeding into the spinal canal, and damage to the nerves or spinal cord.

See Also

• Spinal tap
• Cerebrospinal fluid
• Meningitis
• Encephalitis
• Multiple sclerosis
• Guillain-Barré syndrome
• Hydrocephalus
• Idiopathic intracranial hypertension

LP Resources
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