Mdi Instruments, Inc.

Geoffrey Jenkins

Sandra Kimball

David Kunen

Robert G Hohlfeld

An improved indication of a condition of an ear of a subject, such as a human or other mammal, is provided by combining two or more measurements such as body temperature, detection of fluid in the ear (for example by acoustic reflectance), and/or a characteristic of any fluid in the ear. Results of any two of these measurements may be combined to provide improved diagnostic information. The combination of measured body temperature and a determined likelihood that fluid is present in the ear provides improved diagnostic information regarding the risk of an ear infection. In particular, if a subject has an elevated body temperature and the likelihood is high that fluid is present in the ear, an indication of a risk of ear infection may be provided by the device. The presence of fluid may be detected using acoustic reflectometry, tympanometry, pneumatic otoscopy, otoacoustic emissions or other mechanism. If temperature is measured in the ear, for example by using radiation thermometry, the combined instrumentation may be used to improve alignment between the device and the tympanic membrane, thus improving the accuracy of both temperature measurement and fluid detection. Chemical sensing of characteristics of any fluid in the ear may be combined with the detection of fluid or measurement of body temperature, or both, to provide improved diagnosis of ear pathologies. Chemical sensing determines a characteristic of the fluid, such as whether a bacterium or a virus is present. The device may provide diagnostic information from sensed characteristics of the fluid, measured likelihood that fluid is present in the ear and/or measured body temperature to indicate the risk of an ear infection. For example, the device may determine whether any fluid present is infected, and/or may identify bacteria in the fluid.

Apparatus and method for analysis of ear pathologies by detecting fluid

A device provides an indication of a condition of an ear by combining measurements of temperature in the ear, acoustic reflectance of the ear, and/or a characteristic of any fluid in the ear. Any two of these measurements may be combined in the same device to provide improved diagnostic information. For example, chemical sensing of fluid may be combined with acoustic reflectometry or temperature sensing, or both, to provide improved diagnosis of ear pathologies. Acoustic reflectometry also may be combined with temperature sensing. Chemical sensing determines a characteristic of the fluid, such as whether a bacterium or a virus is present. The device may provide diagnostic information from sensed characteristics of the fluid, measured acoustic reflectance and/or measured temperature to indicate the risk of an ear infection. For example, the device may determine if any fluid present is infected. The device also may identify bacteria in the fluid. The temperature sensor also may be used to improve alignment between the device and the tympanic membrane, thus improving the accuracy of measurements.

Apparatus and method for analysis of ear pathologies using combinations

A radiation thermometer and acoustic reflectometer are combined in the same device. The combined instrumentation can be used to improve alignment between a device and the tympanic membrane, thus improving the accuracy of measurements. In addition, the device can provide diagnostic information based on both the measured temperature and the determined likelihood that fluid is present in the middle of the ear, to indicate the risk of an ear infection. The medical instrument analyzes an ear of a subject, using an acoustic reflectometer and a radiation thermometer. The acoustic reflectometer includes an acoustic transducer for generating acoustic waves at a plurality of frequencies and a microphone for receiving an acoustic signal corresponding to acoustic signals reflected from the ear to provide an output signal. The radiation sensor detects thermal radiation from the ear and provides a signal indicative thereof. The device coordinates measurements by the acoustic reflectometer and radiation sensor to provide an output indicative of a condition of the ear. The medical instrument may indicate to the user when both an elevated temperature and fluid are detected in the ear to provide an indication of a risk of ear infection.

Apparatus and method for analysis of acoustic reflectance and thermal

A device and a process for analysis of acoustic reflectance directs acoustic energy for a range of frequencies including resonance frequencies of the object being analyzed. The device detects waves reflected by the object to produce what is called an acoustic reflectance curve. The electronic signal applied to an acoustic transducer at each frequency is gradually increased in amplitude to a desired amplitude. After applying the signal for a period of time at the desired amplitude, the amplitude is gradually decreased. This technique reduces noise that would otherwise occur if a signal of the desired amplitude was applied directly. The signal applied to the acoustic transducer also may be scaled according to a measured response of the device to open air, i.e., without any expected reflectance. Normalizing the signal applied to the acoustic transducer rather than the signal received from a microphone increases the dynamic range of the device. The device also may require operation for several sweeps through a range of incident frequencies in order to ensure proper user technique is used. When the data for the several sweeps is analyzed, the best result of the several sweeps may be stored as the output.

Growing community of inventors

Wellesley, MA, United States of America

Geoffrey Jenkins