Patent ID: 7383740
Filing Date: 2008-06-10
Classification: A61B,A61M,G01F

Abstract:
1. A medical spirometer comprising a housing with a flow inlet and a flow outlet, and a measurement unit (MU), for measuring rate of total flow between said inlet and said outlet when a user exhales through said spirometer, said MU comprising a fluidic jet oscillator adapted to generate oscillating flow characterized by an oscillating parameter dependent on rate of flow through said jet oscillator, and a transducer adapted to convert said oscillating parameter into an oscillating electric signal, wherein said MU is disposed within said housing so as to form a bypass flow path defined between an outer surface of said MU and an inner surface of said housing, and a measurement flow path defined through said fluidic jet oscillator, such that said total flow is divided into a bypass flow and a measurement flow.