US 12,167,934 B2
Apparatus and method for characterization of acute otitis media
Mark A. Moehring, Seattle, WA (US); George A. Gates, Boerne, TX (US); Daniel M. Kreindler, Foster City, CA (US); Jay A. Chesavage, Palo Alto, CA (US); and Rahul Singh, Carlsbad, CA (US)
Assigned to OtoNexus Medical Technologies, Inc., Bellevue, WA (US)
Filed by OtoNexus Medical Technologies, Inc., Bellevue, WA (US)
Filed on Mar. 17, 2023, as Appl. No. 18/186,049.
Application 18/186,049 is a continuation of application No. 16/739,557, filed on Jan. 10, 2020, granted, now 11,627,935.
Application 16/739,557 is a continuation of application No. 14/797,181, filed on Jul. 13, 2015, granted, now 10,660,604, issued on May 26, 2020.
Prior Publication US 2024/0000421 A1, Jan. 4, 2024
Int. Cl. A61B 5/00 (2006.01); A61B 5/12 (2006.01); A61B 8/12 (2006.01); A61B 8/00 (2006.01); A61B 8/08 (2006.01)
CPC A61B 8/12 (2013.01) [A61B 5/126 (2013.01); A61B 8/085 (2013.01); A61B 8/4427 (2013.01); A61B 8/4444 (2013.01); A61B 8/488 (2013.01); A61B 8/5223 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device for characterizing a surface, the device comprising:
an excitation generator configured to produce an excitation comprising a pressure modulation in air for application to the surface to cause a displacement;
a transducer configured to transmit acoustic waves through the air and towards the surface during a transmit interval and to receive reflected acoustic waves from the surface during a receive interval;
a phase and amplitude detector configured to receive a phase and an amplitude of the reflected acoustic waves, compare a phase of the transmitted acoustic waves to the phase of the reflected acoustic waves, and generate a phase output; and
a response analyzer configured to compare the phase output to the excitation and determine one or more of a viscosity of a fluid adjacent to the surface or a mobility of the surface based on the comparison.