Artificial Tympanic Membrane Simulation for Otoscope Validation
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Solution Overview
Problem
Existing diagnostic tools for otitis media (OM) suffer from high misdiagnosis rates due to the reliance on physician skill and equipment, necessitating improved devices and methods for simulating a tympanic membrane to enhance diagnostic accuracy.
Innovation Solution
Development of a device and method for simulating a tympanic membrane with adjustable fluid volume, viscosity, and gas pressure to mimic various biological states, including disease states, using an artificial tympanic membrane with optical and ultrasound reflectivity, and a housing system to control membrane deflection and movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional diagnostic methods are used for otitis media, then diagnosis can be performed with existing equipment, but misdiagnosis rate is high (30%-50%)
Solution Approach 1:
The patent creates a photorealistic artificial tympanic membrane that visually replicates the appearance, texture, and structural details of a real biological tympanic membrane. This includes mimicking the translucent quality, vascular patterns, and surface irregularities to enable accurate visual diagnosis without requiring actual patient examination, thereby reducing misdiagnosis while maintaining diagnostic reliability
Solution Approach 2:
The artificial tympanic membrane incorporates adjustable parameters including fluid volume, fluid viscosity, and gas pressure within the housing to simulate different pathological states. By varying these physical parameters, the model can represent healthy ears, otitis media with effusion, and other conditions, allowing diagnostic equipment to be tested and calibrated across multiple diagnostic scenarios
2Measurement precision
If new diagnostic equipment is tested on human subjects, then real-world performance can be evaluated, but safety risks and ethical concerns arise
Solution Approach 1:
The patent introduces an artificial tympanic membrane as an intermediary testing medium between diagnostic equipment and human subjects. This intermediary model allows complete testing of otoscopes, pneumatic otoscopes, and other diagnostic devices without exposing human subjects to any potential harm, while still providing realistic diagnostic challenges that validate equipment performance
Solution Approach 2:
By creating a photorealistic copy of the biological tympanic membrane with authentic visual characteristics and pathological variations, the patent enables complete visual and functional testing of diagnostic equipment. The copy includes detailed surface features, translucency, and fluid dynamics that challenge diagnostic devices just as real patient examinations would, eliminating the need for human subject testing
3Device complexity
If a simple artificial membrane is used, then device complexity is reduced, but ability to mimic disease states is insufficient
Solution Approach 1:
The artificial tympanic membrane system is segmented into distinct functional components: the artificial membrane itself, the housing containing the middle ear space, the fluid reservoir, the gas pressure control system, and the ossicular chain simulation. This segmentation allows each component to be independently designed and adjusted to achieve complex pathological simulations while maintaining overall system manageability
Solution Approach 2:
The system incorporates dynamic elements including adjustable fluid volume, variable fluid viscosity, and controllable gas pressure that can be modified to represent different physiological and pathological states. The artificial membrane itself can be made from materials with varying degrees of flexibility and translucency, allowing the system to adapt to represent healthy ears, infected ears, and various stages of otitis media
4Measurement precision
If detailed photorealistic features are added to the artificial membrane, then diagnostic accuracy improves, but manufacturing complexity increases
Solution Approach 1:
The artificial tympanic membrane applies different material properties and visual characteristics to specific local regions to replicate authentic anatomical features. This includes creating localized vascular patterns, varying translucency in different zones, and adding surface irregularities in specific areas to match the natural variation found in real tympanic membranes, thereby enhancing diagnostic accuracy without requiring complete redesign of the entire membrane
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate simulation of tympanic membrane properties for testing otoscope devices, reducing misdiagnosis by allowing for controlled simulation of ear conditions, facilitating safer and more rapid prototyping of diagnostic tools.
Implementation Method 1
an artificial tympanic membrane having an ultrasound reflectivity mimicking an ultrasound reflectivity of a biological tympanic membrane
Implementation Method 2
the interior portion having an adjustable gas pressure. adjustment of one or more of the volume of fluid, the type of fluid, or the gas pressure changes a membrane deflection or a membrane movement
Implementation Method 3
the interior portion having an adjustable volume of fluid or an adjustable type of fluid, and the interior portion having an adjustable gas pressure. adjustment of one or more of the volume of fluid, the type of fluid, or the gas pressure changes a membrane deflection or a membrane movement
Data Source
AI summary
Disclosed herein is a device for modeling properties of an ear. The device includes an artificial tympanic membrane and a housing coupled to the artificial tympanic membrane. The housing defines an interior portion coupled to an interior surface of the artificial tympanic membrane. The interior portion has an adjustable volume or an adjustable type of fluid and an adjustable gas pressure. Adjustment of the volume or type of fluid and the gas pressure changes a membrane movement to produce selected movement properties according to a mobility scale.