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CSF pressure assessed by lumbar puncture agrees with intracranial pressure

From the Departments of Clinical Neuroscience (N.L., L.-O.D.K., A.T.B., J.M.) and Biomedical Engineering and Informatics (A.E.), and Centre for Biomedical Engineering and Physics (N.L., A.E.), Umeå University, Umeå, Sweden.

Address correspondence and reprint requests to Mr. N. Lenfeldt, Department of Clinical Neuroscience, Umeå University, S-901 85 Umeå, Sweden; e-mail: niklas.lenfeldt{at}neuro.umu.se

The accuracy of estimating intracranial pressure in brain tissue (ICP_BT) via lumbar space was investigated using preset pressure levels in the interval 0 to 600 mm H₂O in patients with communicating hydrocephalus. Lumbar space ICP correlated excellently to ICP_BT, demonstrated by a measured mean difference of 10 mm H₂O (0.75 mm Hg) and a regression coefficient of 0.98. The concurrence supports the lumbar puncture as an accurate technique to determine ICP in patients with communicating CSF systems.

Supported by the Karl-Oskar Hansson’s Foundation, King Gustav V’s and Queen Victoria’s Foundation, Swedish Association of Persons with Neurologic Disabilities (NHR), the Alzheimer Foundation Sweden, the Dementia Association Sweden, the Stohnes Foundation, the Foundation for Clinical Neuroscience at the University Hospital of Norrland, and Umeå University.

Disclosure: The authors report no conflicts of interest.

Received January 25, 2006. Accepted in final form September 28, 2006.

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