What Does A Lumbar Needle Check For

Lumbar puncture, also known as lumbar puncture, is a method of measuring intracranial pressure by lumbar interstitial puncture and removing cerebrospinal fluid for examination. Before the advent of CT, the diagnosis of cerebrovascular disease, lumbar puncture is basically to carry out, since the widespread application of CT examination, although the lumbar puncture examination is relatively less, but CT examination can not completely replace the lumbar puncture examination. Some cerebrovascular diseases must also pass the lumbar examination, in order to diagnose and differential diagnosis. When the patient has a headache, vomiting, neck ankylosis and other meningeal stimulation symptoms, what is subarachnoid hemorrhage, or meningitis? To make a differential diagnosis, a CT scan is useless, whereas a lumbar puncture examination is clear. At the same time, if the diagnosis of subarachnoid hemorrhage is confirmed, 5 ~ 10 ml cerebrospinal fluid is released during lumbar puncture, and there is a certain therapeutic effect, in addition to reducing headache, but also can avoid the sequelae of subarachnoid adhesion. Additional, waist wears still have direct measure intracranial pressure, assay checks the action such as cerebrospinal fluid component.

Although lumbar puncture examination still plays a very important role in clinical practice, there are still some patients and their families are afraid of lumbar puncture, mainly for fear of spinal cord injury and health impact. In fact, these worries are unnecessary. Because the spinal cord has a certain length in the spinal canal. The upper end is connected with the medulla oblongata at the foramen magnum, and the lower end is conical in the lower margin of the first lumbar spine, called the spinal cord vertebra, and many cauda equina nerves are divided into the cauda equina. In adults, there is no spinal cord below the first lumbar vertebrae. Instead, there is a wider pool of cerebrospinal fluid in which many cauda equina nerves float. Lumbar puncture examination is usually performed in the space of 3 ~ 4 or 4 ~ 5 lumbar vertebrae, so as not to damage the spinal nerves. In addition, cerebrospinal fluid contains a small amount of sugar, chloride, protein and white blood cells, most of it is water, and the circulation is fast. The total amount of adult cerebrospinal fluid is 120 ~ 150 ml, and the speed of its production is 400 ~ 500 ml 24 hours, and it is renewed 4 ~ 5 times a day. That is to say, cerebrospinal fluid is constantly produced and absorbed, and it is often in a constant state of renewal to maintain dynamic balance. So, 2 ~ 4 ml cerebrospinal fluid is taken out when the waist is pierced, 10 minutes can be filled, will not produce an effect on the body. Therefore, if the condition requires lumbar puncture examination, the patient and family should cooperate well with the doctor.

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