Catheter head-type transducer
AssigneeMitsubishi Petrochemical Co., Ltd.
InventorIwao Seo
Life of this patent
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Abstract
A catheter having a transducer that comprises an organic high polymer filmlike piezoelectric element or elements. The catheter has the capacity of converting, safely and with accurate wave shapes, pressure in the living body, for example blood pressure, pressure in a thorax, or intrauterine pressure, into an electric signal. By means of this catheter, pressure in the living body can be measured.
Claims8
A catheter comprising a tube having a length and a tip, and a transducer on said tip which is comprised of a pair of organic high polymer filmlike piezoelectric elements being mounted on each opposite face of a rectangular shim having feet at each end fixed to and raising the piezoelectric elements from a relatively undeformable inner wall of the catheter tube so that said piezoelectric elements are centrally distorted in response to fluid pressure exerted on said tip, said shim being fixed to the inner wall of the catheter tube at the catheter tip, said piezoelectric elements being adhered to said shim with opposing sides of the same pole to said shim, and conductor means comprising a cable connected respectively with both piezoelectric elements and said shim extending through said tube to conduct the electrical signal generated by the transducer to means for receiving it.
Dependencies are inferred from the claim text.