The determination of the spinal fluid dynamics is a common procedure used whenever disease of the spinal cord is suspected and particularly when there is clinical evidence of an obstructive lesion. Actually, it consists in the testing of the free transmission of pressure along the spinal subarachnoid space. The value of the test depends largely upon the accuracy and skill with which it is perfo...

OBJECTIVE We sought to identify the prevalence of MRI features of disproportionately enlarged subarachnoid space hydrocephalus in possible idiopathic normal pressure hydrocephalus (DESH-iNPH) and to describe the clinico-radiological features and outcomes of a community-based investigation (The Vienna Trans-Danube Aging study). METHODS Of the 697 inhabitants (all 75 years old), 503 completed e...

Cerebral arteriospasm is a common complication of subarachnoid hemorrhage and is responsible for much of the brain damage which accompanies it. No pharmacologic agent has been found which regularly alleviates arteriospasm. We have evaluated the effect of continuous intravenous nitroglycerin infusion on the diameter of the basilar artery in dogs with cerebral vasospasm experimentally induced by ...

INTRODUCTION Subarachnoid hemorrhage is one of the most feared acute neurologic events. Accurate diagnosis of subarachnoid hemorrhage is essential, and computed tomography of the brain is the first diagnostic imaging study. However, in rare circumstances, a similar appearance may occur in the absence of blood in the subarachnoid space. The contrast enhancement of subarachnoid space is a rare co...

A postlaminectomy pseudomeningocele is a spherical, fluid-filled space with fibrous capsule lying dorsal to the thecal canal in the laminectomy opening that occasionally develops after surgery. Eight cases were found in 400 symptomatic postlaminectomy patients undergoing computed tomographic examination. The contents are of cerebrospinal fluid density and may or may not have demonstrable commun...

The purposes of the present study were to determine if the direction of the needle orifice during injection of anesthetic into the subarachnoid space, using a 25-gauge Whitacre spinal needle (Becton Dickinson, Franklin Lakes, NJ) to deliver 15 mg of 0.75% hyperbaric bupivacaine, affected the level of sensory blockade achieved, and if there was a difference in time from injection to surgical ane...

A better understanding of the hydrodynamics of the cerebrospinal fluid (CSF) is important to understand the pathophysiology of various diseases related to the central nervous system (CNS). This project aims to simulate the CSF flow in subject specific subarachnoid spaces (SAS) of healthy volunteers and patients suffering from Chiari malformation. The simulations at high spatial and temporal res...

The authors observed flow-void in a shunt tube in the basal cisterns of a 28-year-old man who had previously undergone surgery for a craniopharyngioma. They describe the appearance of a subarachnoid shunt catheter in the basal cisterns to caution against misinterpreting it as an aberrant vessel.

SUMMARY We describe an MR protocol for the noninvasive imaging of the subarachnoid space, which we use in patients with suspected neurocysticercosis in this space. It consists of a fluid-attenuated inversion recovery sequence performed 5 minutes after the continuous inhalation of 100% O(2) with a resultant increase in the signal intensity of the CSF that leads to a greater conspicuity of cyst w...