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Table 1: 
The diagnostic criteria for SIH proposed by Headache3 Classification Subcommittee of the International Headache Society
  • Diffuse and/or dull headache that worsens within 15 minutes after sitting or standing, with at least 1 of the following and fulfilling criterion: 
    1. Neck stiffness
    2. Tinnitus
    3. Hyperacusia
    4. Photophobia
    5. Nausea
  • At least 1 of the following: 
    1. Evidence of low CSF pressure on MR imaging (eg, pachymeningeal enhancement)
    2. Evidence of CSF leakage on conventional myelography, CT myelography, or cisternography
    3. CSF opening pressure <60 mm H2O in sitting position
  • No history of dural puncture or other cause of CSF fistula
  • Headache resolves within 72 hours after epidural blood patching