Pressure transducer
First Claim
1. A pressure transducer assembly for monitoring pressure in a fluid comprising:
- a hollow body having an open chamber and a uniformly dimensioned passage defining a flow path with an inlet and outlet port in fluid flow communication with said flow path and an opening in said flow path extending to said chamber,a mounting means being an electrical insulator and having a centrally opened web with a receiving well extending outwardly therefrom and a transducer supporting portion in communication therewith,a lid means having a first area shaped to close a part of said opening and maintain a section of said uniformly dimensioned passage and a second area configured to fit within said mounting means receiving well and said first and second areas having a passageway extending therethrough to connect said flow path to the area of said opened web,a pressure transducer means secured in said supporting portion and exposed to said central opening of said web and said lid means passageway for determining and converting fluid pressure in said flow path into electrical signals,a fluid pressure responsive media which is electrically non-conductive said media closing the rest of said opening and filling said passageway between said flow path and said transducer,an electrical conducting means connected to said pressure transducer means and extending through said web and out of said mounted means as electrical connection lugs; and
integrated circuit means mounted to said lugs and connected to an output cable for modifying the signal from said transducer means to permit the signal to be read directly on a measuring instrument.
2 Assignments
0 Petitions
Accused Products
Abstract
Physiologic pressure transducers convert an applied pressure (e.g., blood pressure) into an electric signal, which can be displayed by a monitor as a numerical value or continuous waveform. While reusable pressure transducers have been used for a number of years, innovations in solid-state technology have made disposable transducers feasible. In particular, disposal transducers which are impedance matched for use with monitors formally used for reusable transducers are disclosed. The pressure transducer is rugged due to the careful mounting of the transducer diaphragm and integral compensation circuitry. In addition, the geometric configuration of the flow path is uniform such that debubbling of the unit is easy.
63 Citations
15 Claims
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1. A pressure transducer assembly for monitoring pressure in a fluid comprising:
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a hollow body having an open chamber and a uniformly dimensioned passage defining a flow path with an inlet and outlet port in fluid flow communication with said flow path and an opening in said flow path extending to said chamber, a mounting means being an electrical insulator and having a centrally opened web with a receiving well extending outwardly therefrom and a transducer supporting portion in communication therewith, a lid means having a first area shaped to close a part of said opening and maintain a section of said uniformly dimensioned passage and a second area configured to fit within said mounting means receiving well and said first and second areas having a passageway extending therethrough to connect said flow path to the area of said opened web, a pressure transducer means secured in said supporting portion and exposed to said central opening of said web and said lid means passageway for determining and converting fluid pressure in said flow path into electrical signals, a fluid pressure responsive media which is electrically non-conductive said media closing the rest of said opening and filling said passageway between said flow path and said transducer, an electrical conducting means connected to said pressure transducer means and extending through said web and out of said mounted means as electrical connection lugs; and integrated circuit means mounted to said lugs and connected to an output cable for modifying the signal from said transducer means to permit the signal to be read directly on a measuring instrument. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A pressure transducer assembly for monitoring pressure in a fluid comprising:
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a hollow body having an open chamber and a uniformly dimensioned passage defining a flow path with an inlet and outlet port in fluid flow communication with said flow path and an opening in said flow path extending to said chamber, a connecting means for support being an electrical insulator and having first and second sides with a central opening therethrough and said first side being bonded to said flow path opening, a pressure transducer means resiliently secured to said second side and exposed to said central opening of said connecting means for determining and converting fluid pressure in said flow path into electrical signals, a fluid pressure responsive media which is electrically non-conductive filling said central opening between said flow path and said transducer means, an electrical conducting means connected to said pressure transducer means and extending through said connecting means and out thereof forming as electrical connection lugs, integrated circuit means mounted to and supported by said lugs at one end and connected to an output cable at the other end for modifying the signal from said transducer means to permit the signal to be read directly on a measuring instrument; and cover means sealing said body chamber and forming an enclosure and cooperating therewith as a strain relief for said output cable so the connection therefrom to said integrated circuit cannot impose a load thereon. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification