EP0232142A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Pressure transducer
Assignee: Deseret Medical Inc
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Filing: 1987-01-30
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Granted: —
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Expires: 2007-01-30
Abstract
Abstract Physiological 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, disposable assemblies with transducers which are preferably impedance matched for use with monitors formerly used for reusable transducers, are disclosed. The pressure transducer assembly can be rugged on account of 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.
Inventors
- 👤 Stephen Paul Hanlon
- 👤 Walter Lynn Kerby
- 👤 Edmund Robert Purdy
- 👤 James Strom
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 16:22
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/14; G01L19/142; A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/0215; G01L19/0061; G01L19/0084; G01L19/143; G01L19/147; G01L9/00; G01L9/0001; G01L9/0002; A61B2562/00; A61B2562/02; A61B2562/0247
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
288 words
A pressure transducer assembly, for monitoring fluid pressure, comprising: a hollow body having an open chamber and having a passage defining a flow path between two ports, there also being an opening in the flow path which extends to the chamber; a support means which is locatable within the chamber and which has first and second sides, the support means having a cavity which leads to an opening in the first side, the first side being securable relative to the flow path opening, with the opening in the first side communicating with the opening in the flow path; a pressure transducer means within the cavity and secured to an internal surface of the support means, for converting fluid pressure into first electrical signals; a fluid pressure responsive medium which occupies the cavity between the flow path and the transducer; an electrical conducting means connected to the pressure transducer means and extending beyond the support means, at least part of the extending region being formed as electrical connectors; and integrated circuit means connectable to the electrical connectors and also connectable to an output cable, for modifying the first electrical signals from the transducer to produce second electrical signals which are capable of being read, via the output cable, on a measuring instrument: the arrangement being such that, in use of the assembly in assembled form and with the passage filled with fluid, the fluid pressure, and any change therein, is transmitted through the fluid pressure responsive medium to the transducer means which converts the fluid pressure into first electrical signals, the first electrical signals being converted by the integrated circuit means into second electrical signals which are capable of being read, via the output cable, on a measuring instrument.
Claim 2
Dependent Claim
288 words
A pressure transducer assembly, for monitoring fluid pressure, comprising: a hollow body having an open chamber and having a passage defining a flow path between two ports, there also being an opening in the flow path which extends to the chamber; a support means which is locatable within the chamber and which has first and second sides, the support means having a cavity which leads to an opening in the first side, the first side being securable relative to the flow path opening, with the opening in the first side communicating with the opening in the flow path; a pressure transducer means within the cavity and secured to an internal surface of the support means, for converting fluid pressure into first electrical signals; a fluid pressure responsive medium which occupies the cavity between the flow path and the transducer; an electrical conducting means connected to the pressure transducer means and extending beyond the support means, at least part of the extending region being formed as electrical connectors; and integrated circuit means connectable to the electrical connectors and also connectable to an output cable, for modifying the first electrical signals from the transducer to produce second electrical signals which are capable of being read, via the output cable, on a measuring instrument: the arrangement being such that, in use of the assembly in assembled form and with the passage filled with fluid, the fluid pressure, and any change therein, is transmitted through the fluid pressure responsive medium to the transducer means which converts the fluid pressure into first electrical signals, the first electrical signals being converted by the integrated circuit means into second electrical signals which are capable of being read, via the output cable, on a measuring instrument.
Claim 3
Dependent Claim
20 words
A pressure transducer assembly according to claim 1, wherein the passage defining the flow path is a uniformly dimensioned passage.
Claim 4
Dependent Claim
79 words
A pressure transducer assembly according to claim 1 or 2, wherein the opening in the first side is cylindrical and normal to the path of flow; and the first side is provided with upstanding arcuate portions which conform to portions of the passage, in the region of the opening in the flow path, and which, in combination with the fluid pressure responsive medium, are capable of forming a smooth tubular flow path of uniform cross-section between the two ports.
Claim 5
Dependent Claim
52 words
A pressure transducer assembly according to claim 1, 2 or 3, wherein the first side is sealed within a recess in the hollow body, and the first side is also sealed to the opening in the flow path in order to allow fluid communication between the flow path and the transducer means.
Claim 6
Dependent Claim
20 words
A pressure transducer assembly according to any preceding claim, wherein the support means is formed of an electrically insulating material.
Claim 7
Dependent Claim
18 words
A pressure transducer assembly according to any preceding claim, wherein the fluid pressure responsive medium is electrically non-conductive.
Claim 8
Dependent Claim
41 words
A pressure transducer assembly according to any preceding claim, wherein there is an opening in the second side of the support means, and wherein the pressure transducer means is exposed to the opening in the second side of the support means.
Claim 9
Dependent Claim
34 words
A pressure transducer assembly according to claim 7, wherein the opening in the second side is coaxial with the opening in the first side, and both openings are centrally located in the support means.
Claim 10
Dependent Claim
28 words
A pressure transducer assembly according to claim 7 or 8, wherein the pressure transducer means is resiliently secured to the second side by the fluid pressure responsive medium.
Claim 11
Dependent Claim
61 words
A pressure transducer assembly according to claim 9, wherein the second side is provided with a recess which is capable of supporting and protecting the transducer means which may be resiliently secured therein, and the second side has a peripheral flange in the region of the opening in the second side, for providing a mounting place for the pressure transducer means.
Claim 12
Dependent Claim
38 words
A pressure transducer assembly according to any preceding claim, wherein the integrated circuit means includes signal modifying means capable of appropriately setting impedance from the transducer means to a measuring instrument for analyzing and recording the information transduced.
Claim 13
Dependent Claim
45 words
A pressure transducer assembly according to any preceding claim, wherein a hollow cover is provided, which is capable of cooperating with the hollow body to seal the chamber to form an enclosure, the cover preferably having a flange insertable within the chamber of the body.
Claim 14
Dependent Claim
38 words
A pressure transducer assembly according to claim 12, wherein the output cable is cooperatively engaged by both the body and the cover to relieve strain in the region where the output cable connects with the integrated circuit means.
Claim 15
Dependent Claim
90 words
A pressure transducer assembly according to claim 12 or 13, wherein the integrated circuit means is carried by the electrical conducting means within the enclosure formed by the body and the cover, and the inside surface of the cover does not in any way interfere with, or engage, any portion of the integrated circuit means or the electrical conducting means, such that the integrated circuit means is resiliently suspended from the support means via the electrical conducting means, without being subjected to any stresses from the body or the cover.
References Cited (Backward Citations)
No citation records indexed.
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