The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 09, 1980
Filed:
Jul. 31, 1979
James E Keller, Milford, NH (US);
Irwin Klar, Hudson, NH (US);
Electro Audio Dynamics, Inc., Great Neck, NY (US);
Abstract
An improved tympanometric testing means is described for automatically testing the status of the middle ear. The testing unit provides a recording on a chart showing a change in the compliance of the middle ear during change of the air pressure in the external ear. The tympanometric test unit operates automatically as the clinician inserts the test probe into the patient's ear. The unit automatically determines that the probe is in an unblocked condition and that the test probe tone is at a proper intensity relative to the ear canal volume. When these conditions are met and the ear canal pressure at the probe reaches the predetermined test start pressure, the unit proceeds with the testing as the pressure in the ear canal moves between desired limits such as between the +200 and -200 mm H.sub.2 O and while the recorder makes a plot of the ear drum compliance.