<unk>  is a medical procedure used in some emergency departments to obtain cerebrospinal fluid for diagnostic purposes. In contrast to standard<unk><unk>  by palpation, the use of<unk>  imaging may reduce the number of failed<unk> s, needle insertions, and needle redirections.<unk>  was first described in Russian medical literature in 1971.
Ultrasound-guided lumbar puncture
Lumbar puncture
External ventricular drain
Intracranial pressure monitoring
Cranioscopy
Brain biopsy
Meningeal biopsy
Hemoencephalography