Monitoring and treatment of multiple sclerosis
The present invention relates to a method for monitoring the presence of, or the susceptibility to multiple sclerosis. The method may include obtaining measurements of the cerebrospinal fluid (CSF) flow in a patient using magnetic resonance imaging, and deriving one or more values representing the CSF flow in the patient. These values may be used to determine if the patient has abnormal CSF flow, as such abnormal CSF flow may be indicative of presence of, or susceptibility to multiple sclerosis. The present invention also discloses that magnetic resonance images may be obtained on patients in various positions, including the upright position.
1. A method of detecting and evaluating multiple sclerosis, comprising:
(a) obtaining one or more magnetic resonance images of a patient;
(b) using the one or more magnetic resonance images, obtaining a value representing cerebrospinal fluid flow in the patient based on a measurement of cerebrospinal fluid flow;
(c) determining whether a cranio-cervical structural abnormality is present in the neck of the patient;
(d) determining whether one or more peri-ventricular brain lesions are present in the patient; and
(e) determining whether a combination of:
(i) the value representing cerebrospinal fluid flow meeting a predetermined threshold value;
(ii) a presence of a cranio-cervical structural abnormality; and
(iii) a presence of one or more peri-ventricular brain lesions is present, wherein the presence of said combination is indicative of multiple sclerosis.
2. A method as recited in claim 1 further comprising determining whether the value representing cerebrospinal fluid flow is indicative of impeded cerebrospinal fluid flow, wherein impeded cerebrospinal fluid flow is indicative of multiple sclerosis.
3. A method as recited in claim 1 further comprising determining whether the value representing cerebrospinal fluid flow is indicative of accelerated cerebrospinal fluid flow, wherein accelerated cerebrospinal fluid flow is indicative of multiple sclerosis.
4. A method as recited in claim 1 wherein the predetermined threshold value is a value representing cerebrospinal fluid flow between an average value of a normal patient and an average value of a patient with multiple sclerosis.
5. A method as recited in claim 1 wherein the value representing cerebrospinal fluid flow is cerebrospinal fluid velocity.
6. A method as recited in claim 5 wherein the value representing cerebrospinal fluid flow is a peak cerebrospinal fluid velocity.
7. A method as recited in claim 6 wherein the peak cerebrospinal fluid velocity is a peak cerebrospinal fluid outflow velocity of the patient in an upright position.
8. The method of claim 7 , wherein the predetermined threshold value is between about 1.4 cm/sec and about 1.1 cm/sec.
9. A method as recited in claim 6 wherein the peak cerebrospinal fluid velocity is a peak cerebrospinal fluid inflow velocity of the patient in an upright position.
10. The method of claim 9 , wherein the predetermined threshold value is between about 0.55 cm/sec and about 0.34 cm/sec.
11. A method as recited in claim 1 wherein determining whether a cranio-cervical structural abnormality is present in the neck of the patient is performed at least in part using the one or more magnetic resonance images.
12. A method as recited in claim 1 further comprising treating the patient to reduce intracranial cerebrospinal fluid pressure if an increased risk of developing multiple sclerosis is present in the patient.
13. A method as recited in claim 12 wherein treating the patient includes a treatment selected from the group consisting of stenting the patient's azygous vein, stenting one or both of the patient's internal jugular vein, and installation of a cerebrospinal fluid drainage shunt, and repair of an anatomical abnormality which impedes or accelerates cerebrospinal fluid flow.
14. A method as recited in claim 1 further comprising treating the patient to alleviate or retard development of multiple sclerosis if an increased risk of developing multiple sclerosis is present in the patient.
15. A method as recited in claim 1 further comprising determining to further monitor the patient if an increased risk of developing multiple sclerosis is present in the patient.
16. A method as recited in claim 1 wherein the cranio-cervical structural abnormality includes one or more abnormalities selected from the group consisting of cervical disc herniations and displacements; dislocations, fractures, and degeneration of cervical vertebrae; abnormal ligaments in the patient's cervical spine; abnormalities of the lordotic curvature; displacements or distortion of the patient's spinal cord; and cerebellar tonsil ectopia.
17. The method of claim 1 , wherein the one or more magnetic resonance images comprises an image of the patient's cervical spine in the midline sagittal plane.
18. The method of claim 1 , wherein the one or more magnetic resonance images comprises an image of the patient's cervical spine in the axial plane.
19. The method of claim 18 , wherein the image of the patient's cervical spine in the axial plane is taken at the mid C-2 of the patient's cervical spine, perpendicular to the patient's spinal canal.
20. The method of claim 1 , wherein the one or more magnetic resonance images are obtained with the patient in an upright position.