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lumbar puncture
A lumbar puncture (LP), as known as a spinal tap, is a medical procedure in which a needle is inserted into the spine, most commonly to collect cerebrospinal fluid (CSF) for diagnostic testing. The main reasons 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. Increased intracranial pressure (pressure in the skull) is a contraindication, due to risk of brain matter being compressed and pushed toward the spine. Sometimes, lumbar puncture cannot be performed safely (for example a severe bleeding tendency). It is regarded as a safe procedure, but post-dural-puncture headache is common.
The procedure is typically performed under local anesthesia and aseptic technique. A needle is used to access the subarachnoid space and fluid collected. Fluid may be sent for biochemical, microbiological, and cytological analysis.
Lumbar puncture was first introduced in 1891 by the German physician Heinrich Quincke.
==Medical uses==
The reason for a lumbar puncture may be to make a diagnosis or to treat a disease.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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