scholarly journals Non-invasive estimation of middle-ear input impedance and efficiency

2015 ◽  
Vol 138 (2) ◽  
pp. 977-993 ◽  
Author(s):  
James D. Lewis ◽  
Stephen T. Neely
Keyword(s):  
Middle Ear ◽  
Input Impedance ◽  
Non Invasive

scholarly journals Middle ear function and cochlear input impedance in chinchilla

2010 ◽  
Vol 127 (3) ◽  
pp. 1397-1410 ◽  
Author(s):  
Michaël C. C. Slama ◽  
Michael E. Ravicz ◽  
John J. Rosowski
Keyword(s):  
Middle Ear ◽  
Input Impedance

MEASUREMENTS OF MIDDLE EAR PRESSURE GAIN AND COCHLEAR INPUT IMPEDANCE IN THE CHINCHILLA

2009 ◽  
Author(s):  
MICHAEL C. C. SLAMA ◽  
MICHAEL E. RAVICZ ◽  
HIDEKO H. NAKAJIMA ◽  
WEI DONG ◽  
JOHN J. ROSOWSKI
Keyword(s):  
Middle Ear ◽  
Input Impedance ◽  
Middle Ear Pressure

R437 – Sonotubometry With Perfect Sequences in Pathologic Ears

2008 ◽  
Vol 139 (2_suppl) ◽  
pp. P190-P191
Author(s):  
Ercole F. N. Di Martino ◽  
Deyan Asenov ◽  
Viorel Emanoil Nath ◽  
Aulis Telle ◽  
Peter Vary
Keyword(s):  
Middle Ear ◽  
Normal Function ◽  
New Approach ◽  
Physiological Conditions ◽  
Non Invasive ◽  
Before And After ◽  
Invasive Method ◽  
Group A ◽  
Perfect Sequences ◽  
Group B

Problem Sonotubometry is a non-invasive method for the evaluation of Eustachian Tube (ET) function. Perfect Sequences (PSQE) allow monitoring the ET under physiologic conditions in healthy ears. This study investigates the use of this new approach in pathologic ears. Methods Forty individuals were examined. Group A: n=20 individuals (40 normal ears). Group B: n= 11 patients (16 ears) with acute/subacute ET dysfunction. Group C: n=9 patients with chronic problems requiring tympanoplasty. Sonotubometry was performed before and after operation. As opening maneuvers, yawning, dry swallowing, water swallowing, and Toynbee were employed. Results In group A an ET opening was seen in 77.06% maneuvers and in all patients. The median amplitude (A) of sound increase was 16.64 dB, the duration of the openings (D) was 365 ms. In group B these values were 34.39%, A = 9.27 dB, D=311 ms before and 72.26%, A= 19.51 dB and D=329 ms after operation (myringotomy/tympanostomy). Group C showed openings in 33.83% with A=9.78dB and D=365 ms. There was no significant change after surgery. Conclusion The comparison between normal ears and acute ET dysfunction shows sonotubometrical a return of the normal function after operation within a week in most ears. The results demonstrate that the findings occur not only due to an improved sound transmission through the dry middle ear but from a recovering ET. The results in Group C show that the ET dysfunction is chronic. Significance Sonotubometry with PSQE is feasible for assessment of ET (dys)function under physiological conditions. It has therefore the potential to open new perspectives on ET monitoring. Support Supported by DFG-grant MA 3917/1-1.

scholarly journals Non-invasive optical assessment of viscosity of middle ear effusions in otitis media

2016 ◽  
Vol 10 (3) ◽  
pp. 394-403 ◽  
Author(s):  
Guillermo L. Monroy ◽  
Paritosh Pande ◽  
Ryan L. Shelton ◽  
Ryan M. Nolan ◽  
Darold R. Spillman ◽  
...  
Keyword(s):  
Otitis Media ◽  
Middle Ear ◽  
Non Invasive

scholarly journals Novel method for non-invasive induction of a middle-ear biofilm in the rat

Vaccine ◽  
2011 ◽  
Vol 29 (8) ◽  
pp. 1628-1633 ◽  
Author(s):  
Eric J. Chaney ◽  
Cac T. Nguyen ◽  
Stephen A. Boppart
Keyword(s):  
Middle Ear ◽  
Non Invasive ◽  
Novel Method

Optical coherence tomograph for non-invasive examination of the human middle ear

2021 ◽  
Vol 51 (1) ◽  
pp. 38-42
Author(s):  
P A Shilyagin ◽  
A A Novozhilov ◽  
T E Abubakirov ◽  
A L Dilenyan ◽  
A V Shakhov ◽  
...  
Keyword(s):  
Middle Ear ◽  
Optical Coherence ◽  
Non Invasive ◽  
Human Middle Ear ◽  
Optical Coherence Tomograph

The Non-Invasive Measurement of Geometry of Human Ossicles

2013 ◽  
Vol 284-287 ◽  
pp. 1569-1573
Author(s):  
Jen Fang Yu ◽  
Chia Lun Fan
Keyword(s):  
Image Processing ◽  
Middle Ear ◽  
3D Model ◽  
Smoothing Technique ◽  
Computed Tomography Scan ◽  
Micro Computed Tomography ◽  
Non Invasive ◽  
Middle Ear Disease ◽  
Tomography Scan ◽  
Invasive Measurement

This study is to reconstruct the 3D model of ossicles by the smoothing technique that fitted to the human ossicles. The length of the geometry of the model was then measured. The image of human ossicles was obtained by the micro computed tomography scan. The 3D model of human ossicles was reconstructed by image processing, and then the length of the geometry of the 3D model was measured. The 3D model of human ossicles was reconstructed by image processing and by surface smoothing technique in this study. The surface of the ossicles model was smoothed by Smoothsurface. The length of the short process of the incus was 1.8 mm. The length of the long process of the incus was 5.2 mm. Based on the results obtained by this study, there was almost no difference for the measurements of the lengths of the cadaver malleus and incus between by observation and by image processing. Therefore, the image processing method was convenient and reliable. By the 3D model of ossicles, the clinician could know the structure of middle ear and could diagnose the middle ear disease more exactly.

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