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Objective B wave analysis in 55 patients with non-communicating and communicating hydrocephalus
Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper.
Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper.
Umeå universitet, Medicinska fakulteten, Institutionen för farmakologi och klinisk neurovetenskap, Neurologi.ORCID-id: 0000-0001-6451-1940
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2005 (Engelska)Ingår i: Journal of Neurology, Neurosurgery and Psychiatry, ISSN 0022-3050, E-ISSN 1468-330X, Vol. 76, s. 965-970Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Background: B waves, slow and rhythmic oscillations in intracranial pressure (ICP), are claimed to be one of the best predictors of outcome after surgery for normal pressure hydrocephalus (NPH).

Object: To determine the relation between the percentage of B waves and outcome in patients with hydrocephalus, and also the diurnal variation of B waves.

Methods: ICP and patient behaviour were recorded overnight (17 to 26 hours) in 29 patients with non-communicating hydrocephalus and 26 with NPH. The B wave activity, measured with an amplitude threshold of 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, and 5.0 mm Hg, was estimated as the percentage of total monitoring time (% B waves) using a computer algorithm, and correlated with postoperative outcome, defined as changes in 12 standardised symptoms and signs.

Results: There was no linear correlation between improvement after surgery in the 55 patients and total % B waves, but a correlation was found between improvement and % B waves during sleep (r = 0.39, p = 0.04). The percentage of B waves was the same during sleep and wakefulness, and patients with NPH had the same proportion of B waves as the non-communicating patients.

Conclusions: B waves are commonly observed in patients with both communicating and non-communicating hydrocephalus, but are only weakly related to the degree of postsurgical improvement.

Ort, förlag, år, upplaga, sidor
BMJ Publishing Group , 2005. Vol. 76, s. 965-970
Nyckelord [en]
normal-pressure hydrocephalus; endoscopic 3rd ventriculostomy; cerebrospinal-fluid pressure; primary aqueductal stenosis; arterial-blood pressure; intracranial-pressure; oscillations; outflow; cisternography; resistance
Nationell ämneskategori
Radiologi och bildbehandling
Identifikatorer
URN: urn:nbn:se:umu:diva-14141DOI: 10.1136/jnnp.2004.039834ISI: 000230137200013OAI: oai:DiVA.org:umu-14141DiVA, id: diva2:153812
Tillgänglig från: 2007-11-29 Skapad: 2007-11-29 Senast uppdaterad: 2018-06-09Bibliografiskt granskad

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Andersson, NinaEklund, AndersMalm, Jan

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Institutionen för strålningsvetenskaperNeurologi
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Journal of Neurology, Neurosurgery and Psychiatry
Radiologi och bildbehandling

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