Cerebrospinal fluid puncture

The surgical method of cerebrospinal fluid puncture requires everyone to make pre-operative preparations and post-operative care according to the doctor's advice in life, so it is recommended that everyone should understand the indications for cerebrospinal fluid puncture and post-operative care methods. Cerebrospinal fluid puncture is a procedure to extract the components of cerebrospinal fluid for examination. It has an impact on the brain nerves and skull, so a skilled doctor needs to be selected to perform the operation.

What are the indications for cerebrospinal fluid puncture?

1. When there are symptoms of meningeal irritation, cerebrospinal fluid examination can assist in diagnosis.

2. When intracranial hemorrhage is suspected.

3. Those with symptoms and signs such as severe headache, coma, convulsion or paralysis with unknown causes.

4. Patients suspected of having meningeal leukemia.

5. Intrathecal medication for central nervous system diseases, spinal anesthesia and angiography before surgery, etc.

Cerebrospinal fluid is produced in the choroid plexus of the lateral ventricles. Most of it is an ultrafiltrate of plasma, but it also contains components actively secreted by the choroid plexus. There are mechanical and permeability barriers between the blood and cerebrospinal fluid, and between the cerebrospinal fluid and the brain, which are called the blood-cerebrospinal fluid barrier and the cerebrospinal fluid-brain barrier, respectively.

Produced by special blood vessels inside the brain and reabsorbed by special venous branches. It provides shock absorption and support to the central nervous system. A normal adult has 130 ml of clear cerebrospinal fluid; cerebrospinal fluid is often taken for testing to diagnose diseases of the nervous system.

It is one of the inherent contents of the cranial cavity. It is mainly produced from the choroid plexus in the lateral ventricles, third ventricle and fourth ventricle. The secretory pressure of CSF depends mainly on the difference between mean arterial pressure and ICP. CSF is absorbed mainly through arachnoid granulations, and CSF enters the venous sinuses unidirectionally at a certain flow rate. The rate of absorption depends on the pressure difference between ICP and venous pressure. Secretion and absorption are in a state of relative balance, and it can be seen that ICP is the key to regulating the balance.