How to extract cerebrospinal fluid

Cerebrospinal fluid is not extracted. To obtain cerebrospinal fluid, lumbar puncture examination is required. After lumbar puncture is successful, because the pressure of the patient's cerebrospinal fluid is higher than atmospheric pressure, the patient's cerebrospinal fluid will flow outward along with the puncture needle, so the patient can obtain cerebrospinal fluid. Lumbar puncture examination is the simplest and safest way to obtain cerebrospinal fluid. It can play an important role in the diagnosis of some diseases of the nervous system, such as suspected demyelinating diseases of the central nervous system, infectious diseases or considering some meningeal cancers. Therefore, it is important for neurology to make a clear diagnosis and differential diagnosis.