NDLI: Case study of relevant pressures for an implanted hydrocephalus valve in everyday life

Content Provider	IEEE Xplore Digital Library
Author	Elixmann, I.M. Goffin, C. Krueger, R. Meier, U. Lemcke, J. Kiefer, M. Antes, S. Leonhardt, S.
Copyright Year	2012
Description	Author affiliation: Dept. of Neurosurg., Saarland Univ., Homburg, Germany (Antes, S.) \|\| Helmholtz Inst. for Biomed. Eng., RWTH Aachen Univ., Aachen, Germany (Elixmann, I.M.; Goffin, C.; Leonhardt, S.) \|\| Dept. of Neurosurg., Unfallkrankenhaus Berlin, Berlin, Germany (Krueger, R.; Lemcke, J.; Kiefer, M.) \|\| Hitec-Zang GmbH, Herzogenrath, Germany (Meier, U.)
Abstract	Hydrocephalus patients with increased intracranial pressure are generally treated by draining cerebrospinal fluid (CSF) into the abdomen through an implanted shunt with a passive differential pressure valve. To perfectly adapt the valve's opening pressure to the patient's need, more information on the acutal pressure across the valve in everyday life actions like walking, eating, sleeping etc. is necessary. Therefore, intracranial pressure (ICP), intra-abdominal pressure (IAP) and the hydrostatic pressure between both ends of the the fictitious shunt have been measured simultaneously for up to 24 hours in home environment at different body postures. The patient was wearing the new telemetric ICP probe Neurovent-P-tel as implant. The pressure sensor Omnibar E5F measured IAP in the rectum (10 cm deep). In this pilot study, IAP increased 20 mmHg more than ICP during coughing and 35 mmHg more during sneezing. As the pressure difference across the fictitious valve became negative in some postures, CSF drainage would not have been possible. To the authors' knowledge, this is the first paper that presents measurements, which provide insight into the differential pressure across a hydrocephalus valve in everyday life and give information for future electromechanic shunts development.
Sponsorship	IEEE Eng. Medicine Biol. Soc.
Starting Page	1635
Ending Page	1638
File Size	814354
Page Count	4
File Format	PDF
ISBN	9781424441198
ISSN	1557170X
e-ISBN	9781457717871
DOI	10.1109/EMBC.2012.6346259
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-08-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Iterative closest point algorithm Pressure measurement Valves Telemetry Time measurement Legged locomotion Electron tubes
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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