Cerebrospinal fluid pressure dynamics in CSF:

(1) Jugular vein compression test (Queckenstedt test)

Compression of bilateral jugular veins by hand causes congestion of the intracranial venous system and increases the intracranial pressure. The increased pressure is transmitted to the pressure glass tube connected to the lumbar puncture needle, which can cause a significant increase in the liquid level. The liquid level dropped rapidly. When the spinal canal is obstructed, the fluid level rises and falls slowly or not even after compression. For accurate measurement, use a sphygmomanometer air bag wrapped around the neck, inflate to 2.7-5.3-8kPa (20-40-60mm Hg), press for 30 seconds and then relax for 30 seconds, during which the pressure is recorded every 5 seconds and plotted. into a picture. Patients with increased intracranial pressure or suspected intracranial tumor or hemorrhage should not use.

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