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Table 2: Summary of diagnostic features in 19 patients with a diagnosis of SIH
Patient No. Cranial MR Imaging Spinal MR Imaging CSF Pressure CT Myelography or RC Dural Puncture or Other Causes Response to EBP (Immediate Relief^*)
1 − + N − − +
2 + − ↓ − − +
3 + − 0 − − +
4 + − 0 − − +
5 + − ↓ − − +
6 + − ↓ − − +
7 + − ↓ − − +
8 + − ↓ − − +
9 + + ↓ − − +
10 + − ↓ − − +
11 + − ↓ − − +
12 − + N + − +
13 + − ↓ − − +
14 + − ↓ − − +
15 + − 0 − − +
16 + − ↓ − − +
17 + + ↓ + − +
18 + + ↓ − − +
19 + − ↓ − − +
Note:—SIH indicates spontaneous intracranial hypotension; RC, radionuclide cisternography; EBP, epidural blood patch; N, normal; ↓, low; +, yes; −, no.
* Immediate relief means that the patient symptoms resolve due to the pressure effect of EBP. This does not address complete cure of the disease.