Stethtech Corporation

Baxter International Inc.

Peter R Stark

James A Grasfield

Daniela Steinhubel

David E Winston

John A Purbrick

John R Chapman

Michael A Reed

Dale N Larson

Daniel F Cuffaro

An electronic stethoscope having several modes of operation to process acoustic signals to provide filtered signals useful for diagnosis. In one mode of operation the stethoscope substantially provides only acoustic signals generated by biological activity of the heart. In another mode of operation, the acoustic stethoscope substantially provides only acoustic signals generated by biological activity of the lungs. In another mode of operation, the electronic stethoscope disproportionately amplifies abnormal heart sounds and normal heart sounds to enhance diagnosis of heart abnormalities. The electronic stethoscope is operated in a manner similar to a conventional acoustic stethoscope and has similar spectral characteristics, thus allowing a user with acoustic stethoscope experience to easily use the electronic stethoscope.

Electronic stethoscope

Apparatus and methods for treating a biological fluid with light and for inactivating contaminants in biological fluid. The biological fluid is contacted with a light source providing a high intensity light to the biological fluid. The biological fluid may include a quantity of a photochemical agent that when activated by light is operable to cause inactivation of at least some of the contaminants.

Method and apparatus for inactivating contaminants in biological fluid

Chestpiece of a stethoscope

Housing element of a stethoscope

Stethoscope

Growing community of inventors

Stoneham, MA, United States of America

Peter R Stark