Lumbar puncture needs to go through the 5 layers of structure from shallow to deep

The structures that pass through in sequence are: skin, subcutaneous tissue, supraspinous ligament, interspinous ligament, and ligamentum flavum. After passing through the ligamentum flavum, it reaches the epidural space, and the purpose of epidural anesthesia can be achieved by going to the epidural space; Further advance the needle to penetrate the dura and arachnoid to reach the subarachnoid space, that is, to reach the destination of lumbar puncture.

When the intracranial pressure is increased (especially the posterior fovea and temporal space-occupying lesions), when the lumbar puncture is too much and too fast, brain herniation may occur at the time of the puncture or within a few hours after the operation, so it should be strictly Attention and prevention. If necessary, a dehydrating agent such as 20 percent mannitol solution 250ml can be rapidly intravenously injected before ordering, and then a few drops of cerebrospinal fluid can be slowly dropped by fine needle puncture for laboratory examination.

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