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Reference intervals for the evoked tympanic membrane displacement measurement: a non-invasive measure of intracranial pressure
- Source :
- Physiological Measurement. 39:015008
- Publication Year :
- 2018
- Publisher :
- IOP Publishing, 2018.
-
Abstract
- OBJECTIVE Evoked tympanic membrane displacement (TMD) is a non-invasive technique for assessing intracranial pressure (ICP). The aim of this study was to define reference intervals (RIs) in the healthy population. APPROACH Measurements were made in 154 healthy adults. Results were quantified by V m, which is the most frequently described TMD measurement. Distributions were determined for sitting and supine posture. Differences between right and left ears were explored using a Wilcoxon signed-rank test. Postural changes were used to assess pressure transfer between the cerebral spinal fluid (CSF) and the perilymph. MAIN RESULTS The range in which 95% of scores fall is -283 to 722 nl (M = 132 nl) left sitting, -232 to 623 nl (M = 97 nl) right sitting, -543 to 717 nl (M = 37 nl) left supine and -584 to 504 nl (M = -15 nl) right supine. No significant difference was seen between the left and right ears in the sitting position; a significant difference was seen in the supine position. A significant effect of posture was seen for both the left and right ears. Postural changes indicated pressure transfer between the CSF and perilymph more often in the right ear (75.3%) than the left (61.9%). Pressure transfer could not be assumed in either ear for 13.4% of participants. SIGNIFICANCE We present the largest dataset of evoked TMD in healthy individuals and the first set of RIs for V m. A patient cohort with both invasive ICP and evoked TMD measurements is needed to validate the technique for clinical use.
- Subjects :
- Adult
Male
Tympanic Membrane
Supine position
Intracranial Pressure
Physiology
Posture
Biomedical Engineering
Biophysics
Sitting
Young Adult
03 medical and health sciences
0302 clinical medicine
Reference Values
Physiology (medical)
Humans
Medicine
Displacement (orthopedic surgery)
030223 otorhinolaryngology
Aged
Intracranial pressure
Aged, 80 and over
business.industry
Healthy population
Non invasive
Middle Aged
Perilymph
Healthy Volunteers
Reference intervals
Female
business
Nuclear medicine
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 13616579
- Volume :
- 39
- Database :
- OpenAIRE
- Journal :
- Physiological Measurement
- Accession number :
- edsair.doi.dedup.....4697977564fbbae5b653c6372fd33bcb