Reduction of tympanic membrane displacement during vocalization of the arboreal frog, Eleutherodactylus coqui

1992 ◽  
Vol 91 (6) ◽  
pp. 3551-3557 ◽  
Author(s):  
Peter M. Narins
Keyword(s):  
Tympanic Membrane ◽  
Eleutherodactylus Coqui ◽  
Membrane Displacement

scholarly journals Quantifying the contribution of intracranial pressure and arterial blood pressure to spontaneous tympanic membrane displacement

2018 ◽  
Vol 39 (8) ◽  
pp. 085002
Author(s):  
Wahbi K El-Bouri ◽  
Dario Vignali ◽  
Konstantina Iliadi ◽  
Diederik Bulters ◽  
Robert J Marchbanks ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Intracranial Pressure ◽  
Tympanic Membrane ◽  
Arterial Blood Pressure ◽  
Arterial Blood ◽  
Membrane Displacement

Objective tinnitus and tympanic membrane displacement

1989 ◽  
Vol 103 (9) ◽  
pp. 872-873 ◽  
Author(s):  
J. J. Phillipps ◽  
A. Reid ◽  
R. J. Marchbanks ◽  
R. F. Jarrar
Keyword(s):  
Tympanic Membrane ◽  
Young Girl ◽  
Objective Tinnitus ◽  
Probable Origin ◽  
Membrane Displacement

AbstractA young girl with objective tinnitus is presented. Using tympanic membrane displacement, the probable origin of the tinnitus has been demonstrated. The patient has responded well to treatment with a tinnitus masker.

Reference intervals for the evoked tympanic membrane displacement measurement: a non-invasive measure of intracranial pressure

2018 ◽  
Vol 39 (1) ◽  
pp. 015008 ◽  
Author(s):  
Cherith M Campbell-Bell ◽  
Anthony A Birch ◽  
Dario Vignali ◽  
Diederik Bulters ◽  
Robert J Marchbanks
Keyword(s):  
Intracranial Pressure ◽  
Tympanic Membrane ◽  
Reference Intervals ◽  
Displacement Measurement ◽  
Non Invasive ◽  
Membrane Displacement

Tympanic membrane displacement testing in regular assessment of intracranial pressure in eight children with shunted hydrocephalus

1998 ◽  
Vol 88 (6) ◽  
pp. 983-995 ◽  
Author(s):  
Madan Samuel ◽  
David M. Burge ◽  
Robert J. Marchbanks
Keyword(s):  
Intracranial Pressure ◽  
Positive Predictive Value ◽  
Tympanic Membrane ◽  
Predictive Value ◽  
Comparative Evaluation ◽  
Icp Monitoring ◽  
Content Type ◽  
Accuracy And Repeatability ◽  
Fine Print ◽  
Membrane Displacement

Object. The authors assessed the accuracy and repeatability of the tympanic membrane displacement (TMD) test, an audiometric technique that is used to evaluate changes in intracranial pressure (ICP) in children with shunted hydrocephalus. Methods. A prospective comparative evaluation of 31 clinical episodes of shunt malfunction was made by using the serial TMD test and direct ICP measurement in eight children with shunted hydrocephalus between January 1995 and February 1996. The volume displacement of the tympanic membrane (Vm) on stapedial contraction was inward for raised ICP in 11 instances and ranged from −120 to −539 nl (mean −263.5 nl). This was confirmed by direct ICP monitoring, which showed values ranging from 20 to 30 mm Hg (mean 26 mm Hg). The TMD test measurement (Vm) in 18 instances of low ICP ranged from 263 to 717 nl (mean 431.3 nl); this was corroborated by direct ICP measurement, which ranged from 3 to 7 mm Hg (mean 4.2 mm Hg). The normal baseline Vm values obtained when patients were asymptomatic ranged from −98 to 197 nl (mean 110 nl). As a noninvasive diagnostic tool used in predicting changes in ICP, the TMD test had a sensitivity of 83% and specificity of 100%. The positive predictive value of the test was 100% and the negative predictive value was 29%. Conclusions. The TMD test can be used on a regular basis as a reproducible investigative tool in the assessment of ICP in children with shunted hydrocephalus, thereby reducing the need for invasive ICP monitoring. The equipment necessary to perform this testing is mobile. It will provide a useful serial guide to ICP abnormalities in children with shunted hydrocephalus.

A vascular subtraction method for improving the variability of evoked tympanic membrane displacement measurements

2021 ◽  
Author(s):  
Cherith M Campbell-Bell ◽  
Sammy J Sharif ◽  
Tianyu Zhang ◽  
Diederik O Bulters ◽  
Robert J Marchbanks ◽  
...  
Keyword(s):  
Tympanic Membrane ◽  
Subtraction Method ◽  
Displacement Measurements ◽  
Membrane Displacement
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