Monitoring Intracranial Pressure Using Non-Invasive Brain Stethoscope

Monitoring intracranial pressure (ICP) is vital for patients with elevated, or potentially elevated ICP. This pressure can be monitored using invasive procedures such as lumbar puncture manometry or various methods of direct measurement in or upon the brain, each with attendant complication risks. M...

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Bibliographic Details
Published in:SoutheastCon 2018 pp. 1 - 5
Main Authors: Azad, Md Khurshidul, Spiewak, Andrew, Sandler, Richard H., Manwaring, Kim, Manwaring, Preston, Mansy, Hansen A
Format: Conference Proceeding
Language:English
Published: IEEE 01.04.2018
Subjects:
Ear
Electron tubes
ICP
Irrigation
Iterative closest point algorithm
Lead time
Monitoring
Normalized deviation from mean
Testing
TMp
Valves
ISSN:1558-058X
Online Access:Get full text
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Summary:Monitoring intracranial pressure (ICP) is vital for patients with elevated, or potentially elevated ICP. This pressure can be monitored using invasive procedures such as lumbar puncture manometry or various methods of direct measurement in or upon the brain, each with attendant complication risks. Measurement of naturally occurring tympanic membrane pulse (TMp) may provide an alternative non-invasive method of monitoring ICP, which would help the risks of invasive methodologies. This paper discusses a piezo based sensor (which we term the "brain stethoscope") designed and tested to acquire TMp signals. In addition, the TMp signals were acquired from five human subjects where ICP was expected to vary. ICP was increased in this experimental model using head down positioning on a tilt table. Results showed that tympanic membrane waveform changed in morphology and amplitude with increased ICP. The lead time between the TMp signal and a reference signal (Ear lobe blood flow pulse) was found to increase as ICP increased using this model. We conclude that measurement of TMp changes may provide a new non-invasive, low cost and easy to perform technique for monitoring patients at risk of elevated ICP.
ISSN:1558-058X
DOI:10.1109/SECON.2018.8478919