scholarly journals CSF Flow through the Upper Cervical Spinal Canal in Chiari I Malformation

2011 ◽  
Vol 32 (6) ◽  
pp. 1149-1153 ◽  
Author(s):  
S. Shah ◽  
V. Haughton ◽  
A. Muñoz del Río
Keyword(s):  
Spinal Canal ◽  
Chiari I Malformation ◽  
Csf Flow ◽  
Cervical Spinal Canal ◽  
Upper Cervical ◽  
Chiari I ◽  
Flow Through

scholarly journals Estimation of CSF Flow Resistance in the Upper Cervical Spine

2013 ◽  
Vol 26 (1) ◽  
pp. 106-110 ◽  
Author(s):  
K-A. Mardal ◽  
G. Rutkowska ◽  
S. Linge ◽  
V. Haughton
Keyword(s):  
Cervical Spine ◽  
Healthy Volunteers ◽  
Subarachnoid Space ◽  
Spinal Canal ◽  
Flow Resistance ◽  
Upper Cervical Spine ◽  
Csf Flow ◽  
Cervical Spinal Canal ◽  
Upper Cervical ◽  
Chiari I

Chiari I patients have increased CSF velocities in the foramen magnum due hypothetically to increased pressure gradients or reduced flow resistance. We calculated flow resistance in the cervical spinal canal in a group of subjects with and without the Chiari malformation. Eight subjects including healthy volunteers and Chiari I patients were studied. From 3D high resolution MR images of the cervical spine mathematical models of the subarachnoid spaces were created by means of standard programs for segmentation and discretization. Oscillatory flow through the subarachnoid space was simulated. Cross-sectional area of the subarachnoid space was computed at each level from C1 through C4 and the length of this spinal canal segment was measured. Peak caudad CSF flow velocity at each level was plotted against cross-section area. CSF volumetric flux and resistance were calculated for each subject. The correlation between velocity and resistance was calculated. In all subjects, peak velocities increased progressively from C1 to C4 by 0.6 to 0.7 cm/s per level. Spinal canal areas diminished from C1 to C5 in each subject at a rate of 0.25 to 0.29 cm2per level. Resistance averaged 4.3 pascal/ml/s in the eight subjects; 3.8 pascal/ml/s in patients with tonsilar herniation and 6.0 pascal/ml/s in volunteers. Velocity correlated inversely with resistance (R2= 0.6). CSF velocities correlated inversely with the flow resistance in the upper cervical spinal canal. Resistance tends to be lower in Chiari I patients than in healthy volunteers.

scholarly journals Tapering of the Cervical Spinal Canal in Patients with Scoliosis with and without the Chiari I Malformation

2012 ◽  
Vol 33 (9) ◽  
pp. 1752-1755 ◽  
Author(s):  
J. Hammersley ◽  
V. Haughton ◽  
Y. Wang ◽  
A. Munoz del Rio
Keyword(s):  
Spinal Canal ◽  
Chiari I Malformation ◽  
Cervical Spinal Canal ◽  
Chiari I

scholarly journals Relationship between Cough-Associated Changes in CSF Flow and Disease Severity in Chiari I Malformation: An Exploratory Study Using Real-Time MRI

2018 ◽  
Vol 39 (7) ◽  
pp. 1267-1272 ◽  
Author(s):  
A.F. Bezuidenhout ◽  
D. Khatami ◽  
C.B. Heilman ◽  
E.M. Kasper ◽  
S. Patz ◽  
...  
Keyword(s):  
Real Time ◽  
Disease Severity ◽  
Exploratory Study ◽  
Chiari I Malformation ◽  
Csf Flow ◽  
Chiari I

CFD Modeling for Patient-Specific Analysis of Cerebrospinal Fluid Flow

2007 ◽  
Author(s):  
Alejandro Roldán ◽  
Andrew Wentland ◽  
Oliver Wieben ◽  
Victor Haughton ◽  
Tim Osswald ◽  
...  
Keyword(s):  
Cerebrospinal Fluid ◽  
Spinal Canal ◽  
Chiari Malformation ◽  
Cfd Modeling ◽  
Patient Specific ◽  
Variable Response ◽  
Cervical Spinal Canal ◽  
Upper Cervical ◽  
The Impact ◽  
Cerebellar Tonsils

Chiari malformations are characterized by the cerebellar tonsils extending into the upper cervical spinal canal. Many patients with Chiari malformation experience headaches or develop a cyst in the spinal cord inferior to the cerebellar tonsils. Some symptomatic patients benefit from a surgical procedure to enlarge the foramen magnum and others do not. The causes of symptoms and variable response to surgery remain unknown. Imaging studies have shown that patients with a Chiari malformation exhibit increased cerebrospinal fluid (CSF) velocities compared to subjects without the malformation. Improved methods of analyzing the CSF fluid dynamics are needed to evaluate the impact of increased fluid velocities on pressure differentials in the upper cervical spinal canal and the potential impact of surgery on flow dynamics in patient specific geometries.

scholarly journals Interpretation and value of MR CSF flow studies for paediatric neurosurgery

2013 ◽  
Vol 17 (1) ◽  
pp. 26-29 ◽  
Author(s):  
Samukelisiwe Sithembile Mbonane ◽  
Savvas Andronikou
Keyword(s):  
Imaging Techniques ◽  
Aqueductal Stenosis ◽  
Chiari I Malformation ◽  
Invasive Technique ◽  
Third Ventriculostomy ◽  
Csf Flow ◽  
Mechanical Coupling ◽  
Non Invasive ◽  
Technical Requirements ◽  
Chiari I

Imaging techniques may be underutilised when clinicians are unaware of the technique or do not recognise its potential. Phase-contrast MR imaging (PC-MRI) is a rapid, simple and non-invasive technique that is sensitive to CSF flow. It demonstrates a mechanical coupling between cerebral blood and CSF flow throughout the cardiac cycle. Neurosurgeons should be able to request this procedure routinely as part of an MRI request. This paper gives an overview of the indications, technical requirements, technique and interpretation, using image examples. Indications for CSF flow studies include assessment and functionality of shunt treatment in patients with hydrocephalus; hydrocephalus associated with achondroplasia; Chiari I malformation; confirmation of aqueductal stenosis; and determining patency of a third ventriculostomy.

Oscillopsia and Primary Cerebellar Ectopia: Case Report and Review of the Literature

Neurosurgery ◽  
1991 ◽  
Vol 29 (6) ◽  
pp. 932-936 ◽  
Author(s):  
Scott I. Gingold ◽  
Jeffrey A. Winfield
Keyword(s):  
Early Recognition ◽  
Complete Recovery ◽  
Visual Disturbance ◽  
Foramen Magnum ◽  
Chiari I Malformation ◽  
Downbeat Nystagmus ◽  
Suboccipital Craniectomy ◽  
Stationary Objects ◽  
Upper Cervical ◽  
Chiari I

Abstract Oscillopsia, the visual sensation of stationary objects swaying back and forth or vibrating, has been described in association with downbeat nystagmus in patients with primary cerebellar ectopia (Chiari I malformation). A patient with symptomatic oscillopsia without downbeat nystagmus, who was diagnosed by magnetic resonance imaging to have displaced cerebellar tonsils below the foramen magnum, is presented here. Suboccipital craniectomy and upper cervical laminectomy completely relieved the visual disturbance of the patient. The pathogenesis and surgical management of oscillopsia are discussed with respect to the current literature. Early recognition and surgical decompression of cerebellar ectopia may lead to complete recovery in patients with minimal symptomatology.

Correlation of hindbrain CSF flow and outcome after surgical decompression for Chiari I malformation

2008 ◽  
Vol 24 (7) ◽  
pp. 833-840 ◽  
Author(s):  
Matthew J. McGirt ◽  
April Atiba ◽  
Frank J. Attenello ◽  
Bruce A. Wasserman ◽  
Ghazala Datoo ◽  
...  
Keyword(s):  
Chiari I Malformation ◽  
Surgical Decompression ◽  
Csf Flow ◽  
Chiari I
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