WO1994020016B1 - Transducer housing with a calibration port - Google Patents
Transducer housing with a calibration portInfo
- Publication number
- WO1994020016B1 WO1994020016B1 PCT/US1994/002094 US9402094W WO9420016B1 WO 1994020016 B1 WO1994020016 B1 WO 1994020016B1 US 9402094 W US9402094 W US 9402094W WO 9420016 B1 WO9420016 B1 WO 9420016B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transducer
- fluid
- diaphragm
- calibration
- pressures
- Prior art date
Links
- 239000012530 fluid Substances 0.000 claims abstract 50
- 239000000969 carrier Substances 0.000 claims 19
- 238000007789 sealing Methods 0.000 claims 15
- 239000000463 material Substances 0.000 claims 10
- 238000002955 isolation Methods 0.000 claims 7
- 229920003023 plastic Polymers 0.000 claims 6
- 239000004065 semiconductor Substances 0.000 claims 6
- 230000000004 hemodynamic Effects 0.000 claims 2
- 239000007788 liquid Substances 0.000 claims 2
- 229920001296 polysiloxane Polymers 0.000 claims 2
Abstract
A novel pressure transducer apparatus (10) for medical pressure monitoring apparatus having a housing (14, 28) with a calibration port or well (38). The patient side of the transducer (60) senses fluid pressures to be monitored. The non-patient side of the transducer (60) is hermetically sealed in the housing (14, 28) of the apparatus (10). The housing (14, 28) has a female calibration well (38) communicating, via a pinhole (42), with the non-patient side of the transducer (60). The non-patient side of the transducer (60) can thus alternatively be vented to atmospheric pressure or be exposed to a vacuum calibration pressure.
Claims
1. A disposable pressure transducer apparatus for use in measuring hemodynamic pressures and the like, . . comprising: housing means for defining a fluid passageway for containing a pressurized fluid, and for defining a transducer chamber separated from the fluid passageway, said housing means comprising a pressure monitoring port means for providing communication of fluid pressures in the fluid passageway to the transducer chamber; transducer means, disposed in the transducer chamber, for producing electrical signals proportional to fluid pressures sensed in the fluid passageway through the pressure monitoring port means, said transducer means comprising a diaphragm that is flexed in response to the sensed fluid pressures, a front side of the diaphragm disposed over the pressure monitoring port means; first hermetic sealing means for creating an airtight seal so that the front side of the diaphragm is in fluid communication only with the pressure monitoring port means and the sensed fluid pressures in the fluid passageway; said housing means further comprising a female calibration port means for providing a vent to atmosphere and for providing communication of calibration pressure to the transducer chamber, said housing means further comprising another port means for providing electrical connection of a cable therethrough to said transducer means; said transducer means further comprising a backside of the diaphragm in fluid communication with the atmospheric or calibration pressures communicated through the calibration port means; and second hermetic sealing means for creating an airtight seal so that the backside of the diaphragm is in fluid communication only with the calibration port means and the atmospheric or calibration pressures communicated therethrough.
2. An apparatus as defined in Claim l wherein said housing means comprises top and bottom members which, when joined together, form therebetween the transducer chamber.
3. An apparatus as defined in Claim 2 wherein the top member is a single molded piece of plastic material, and wherein the top member comprises a tubular member joined to a generally rectangular shaped member having four sidewalls and a top piece, and an open bottom.
. An apparatus as defined in Claim 3 wherein at least the tubular member is constructed of a transparent plastic material.
5. An apparatus as defined in Claim 3 wherein the tubular member and the top of said rectangular shaped member are joined at a common wall, and wherein the pressure monitoring port means comprises an aperture formed in the common wall.
6. An apparatus as defined in Claim 3 wherein the bottom member is a single molded piece of plastic material and is comprised of a bottom piece sized to enclose the open bottom of the rectangular shaped member so as to form therein the transducer chamber.
7. An apparatus as defined in Claim 3 wherein the bottom member comprises four sidewalls having a generally rectangular shape, and the four sidewalls of the bottom member being adapted to fit within and in sealing engagement with the four sidewalls of the top member.
8. An apparatus as defined in Claim 7 wherein the second hermetic sealing means comprises a fluid-tight bond between the sidewalls and the top piece of the top member, with the sidewalls of the bottom member.
9. An apparatus as defined in Claim 7 wherein the female calibration port means is formed in the bottom member.
10. An apparatus as defined in Claim 9 wherein the female calibration port means comprises a female luer slip fitting in the form of a generally cylindrical, tapered well with a bottom and cylindrical sides, and an open top.
11. An apparatus as defined in Claim 10 wherein the bottom of the well has a small pin hole formed at a juncture between the bottom of the well and the cylindrical sides, said pin hole providing communication of atmospheric or calibration pressures to said transducer chamber.
12. An apparatus as defined in Claim 11 wherein the pin hole is small enough to prevent passage of liquids at typical atmospheric pressures.
13. An apparatus as defined in claim 11 wherein the second hermetic sealing means comprises an elastomeric member encircling in a fluid tight manner the cylindrical sides of the well inside of the transducer chamber.
14. An apparatus as defined in claim 13 wherein the transducer means comprises a piezoresistive semiconductor chip mounted on a two-sided chip carrier member.
15. An apparatus as defined in claim 14 wherein the chip carrier member is hermetically bonded on one side to a common wall so as to form said first hermetic sealing means, and wherein the other side of said chip carrier member is spaced from the bottom of said well. 31
16. An apparatus as defined in claim 21 wherein the other side of said chip carrier member has an aperture that communicates with the backside of the transducer diaphragm, and wherein the space between the bottom of the well and said other side of the chip carrier member is hermetically sealed around said aperture by the elastomeric member, so as to provide said second hermetic sealing means.
17. An apparatus as defined in claim 22 wherein the aperture in the other side of the chip carrier member is generally aligned with the center of the bottom of the well, and is not in alignment with the pin hole, so as to form a tortuous path for fluid communication between the outside of the housing means and the backside of the transducer diaphragm.
18. An apparatus as defined in claims 14 or 23 wherein the chip carrier member comprises a bowl adapted to fit within the pressure monitoring port means, said bowl having an opening in the bottom thereof adjacent the front side of the diaphragm, and said bowl containing isolation means for electrically isolating the semiconductor chip from fluids contained in the fluid passageway, while still communicating fluid pressures through the isolating means to the front side of the diaphragm.
19. An apparatus as defined in claim 24 wherein the isolating material comprises a silicone gel type material which fills said bowl.
20. An apparatus comprising: housing means for defining a fluid passageway for containing a pressurized fluid, and for defining a transducer chamber separated from the fluid passageway, said housing means comprising top and bottom members which, when joined together , form therebetween the transducer chamber , said housing 32
means further comprising a pressure monitoring port means for providing communication of fluid pressures in th# fluid passageway to the transducer chamber, and further comprising a female calibration port means for providing a vent to atmosphere and for providing communication of calibration pressure to the transducer chamber, said housing means further comprising another port means for providing electrical connection of a cable therethrough to said transducer means; a semiconductor transducer means for sensing fluid pressures, and comprising a diaphragm with a front side for sensing fluid pressures communicated through the pressure monitoring port means, and a backside for sensing atmospheric and calibration pressures communicated through the calibration port means, said transducer means being disposed in the transducer chamber; two-sided carrier means for securing the semiconductor transducer means in the transducer chamber, and comprising isolation means disposed in the pressure monitoring port means for electrically isolating the front side of the diaphragm from fluids contained in the fluid passageway, while still communicating fluid pressures through the isolating means to the front side of the diaphragm; first hermetic sealing means for creating an airtight seal so that the front side of the diaphragm is in fluid communication only with the pressure monitoring port means and the sensed fluid pressures in the fluid passageway; and second hermetic sealing means for creating an airtight seal so that the backside of the diaphragm is in fluid communication only with the calibration port means and the atmospheric or calibration pressures communicated therethrough. 33
21. An apparatus as defined in Claim 26 wherein the female calibration port means is formed in the bottom member.
22. An apparatus as defined in Claim 27 wherein the female calibration port means comprises a female luer slip fitting in the form of a generally cylindrical, tapered well with a bottom and cylindrical sides, and an open top.
23. An apparatus as defined in Claim 28 wherein the bottom of the well has a small pin hole formed at a juncture between the bottom of the well and the cylindrical sides, said pin hole providing communication of atmospheric or calibration pressures to said transducer chamber.
24. An apparatus as defined in Claim 29 wherein the pin hole is small enough to prevent passage of liquids at typical atmospheric pressures.
25. An apparatus as defined in claims 29 or 30 wherein the second hermetic sealing means comprises an elastomeric member encircling in a fluid tight manner the cylindrical sides of the well inside of the transducer chamber.
26. An apparatus as defined in Claim 31 wherein the top member is a single molded piece of plastic material, and wherein the top member comprises a tubular member joined to a generally rectangular shaped member having four sidewalls and a top piece, and an open bottom.
27. An apparatus as defined in Claim 32 wherein the tubular member and the top of said rectangular shaped member are joined at a common wall, and wherein the pressure monitoring port means comprises an aperture formed in the common wall. 34
28. An apparatus as defined in claim 33 wherein the carrier means is hermetically bonded on one side to the common wall so as to form said first hermetic sealing means, and wherein the other side of said carrier means is spaced from the bottom of said well.
29. An apparatus as defined in claim 34 wherein the other side of said carrier means has an aperture that communicates with the backside of the transducer diaphragm, and wherein the space between the bottom of the well and said other side of the carrier means is hermetically sealed around said aperture by the elastomeric member, so as to provide said second hermetic sealing means.
30. An apparatus as defined in claim 35 wherein the aperture in the other side of the carrier means is generally aligned with the center of the bottom of the well, and is not in alignment with the pin hole, so as to form a tortuous path for fluid communication between the outside of the housing means and the backside of the transducer diaphragm.
31. An apparatus as defined in claim 36 wherein the carrier means comprises a bowl adapted to fit within the pressure monitoring port means, said bowl having an opening in the bottom thereof adjacent the front side of the diaphragm, and said bowl containing the isolation means.
32. An apparatus as defined in claim 37 wherein the isolation means comprises a silicone gel type material which fills said bowl.
33. An apparatus as defined in Claim 38 wherein at least the tubular member is constructed of a transparent plastic material. 35
34. An apparatus as defined in Claim 39 wherein the bottom member is a single molded piece of plastic material and is comprised of a bottom piece sized to enclose the open bottom of the rectangular shaped member so as to form therein the transducer chamber.
35. An apparatus as defined in Claim 40 wherein the bottom member comprises four sidewalls having a generally rectangular shape, and the four sidewalls of the bottom member being adapted to fit within and in sealing engagement with the four sidewalls of the top member.
36. A disposable pressure transducer apparatus for use in measuring hemodynamic pressures and the like, comprising: housing means for defining a fluid passageway for containing a pressurized fluid, and for defining a transducer chamber separated from the fluid passageway, said housing means comprising top and bottom members which, when joined together, form therebetween the transducer chamber, and further comprising a pressure monitoring port for providing communication of fluid pressures in the fluid passageway to the transducer chamber, and a female calibration port for providing a vent to atmosphere and for providing communication of calibration pressures to the transducer chamber, and wherein the female calibration port is formed in the bottom member in the form of a generally cylindrical, tapered well with a bottom and cylindrical sides, and an open top, the bottom of the well having a small pinhole formed at a juncture between the bottom of the well and the cylindrical sides so as to provide communication of said atmospheric and calibration pressures therethrough to said transducer chamber; a semi-conductor transducer means for sensing fluid pressures, and comprising a diaphragm with a 36
front side for sensing fluid pressures communicated through the pressure monitoring port, and a backside for sensing atmospheric and calibration pressures communicated through the pinhole of the female calibration port, said transducer means being disposed in the transducer chamber; carrier means for securing the semi-conductor transducer means in the transducer chamber, and comprising isolation means disposed in the pressure monitoring port for electrically isolating the front side of the diaphragm from fluids contained in the fluid passageway, while still communicating fluid pressures through the isolation means to the front side of the diaphragm, said carrier means further comprising an aperture that communicates with the backside of the transducer diaphragm and wherein said aperture is generally aligned with the center of the bottom of the well and is not in alignment with the pinhole so as to form a tortuous path for fluid communication between the outside of the housing means and the backside of the transducer diaphragm; first hermetic sealing means for creating an airtight seal so that the front side of the diaphragm is in fluid communication only with the pressure monitoring port and the sensed fluid pressures in the fluid passageway; and second hermetic sealing means for creating an airtight seal so that the backside of the diaphragm is in fluid communication only with the atmospheric or calibration pressures communicated through the pin hole and the aperture of said carrier means. 37
STATEMENT UNDER ARTICLE 19
In claim 13 the term "sidewalls" has been replaced by the term —sides— to provide proper antecedent basis. In claim 14, from which claim 15 now depends, the term "two- sided" has been inserted in reference to the carrier member, so as to provide antecedent for the sides recited in claims 15 and 16. Claim 17 has been amended to depend from claim 16. Claim 20 has been amended in the same fashion as claim 14 so as to recite "two-sided" in reference to the carrier means so as to provide proper antecedent for the sides defined in claim 28. In claim 25, the term "sidewalls" has been replaced to read —sides—.
In claim 32 the term "isolating material" has been replaced by the term —isolation means— so as to provide proper antecedent basis for that term. In claim 36 the word
"means" has been inserted after the word "transducer" to provide agreement with its antecedent. Also in claim 36 the word "isolating" has been changed to read — isolation—, and the word "passageways" has been changed to read —passageway—.
The invention claimed herein by applicants utilizes a transducer housing that has a female calibration port means for providing a vent to atmosphere and for providing communication of calibration pressure to the transducer chamber, which is entirely separate from and does not form any part of the structure relative to the electrical cable. Accordingly, independent claims 1 and 20 have each been amended to recite that the housing means further comprises "another port means for providing electrical connection of a cable therethrough to said transducer means." Accordingly, the pressure transducer apparatus as defined in Applicants' claims 1 and 20 have each been clarified by defining the calibration port means as a completely separate structure apart from the electrical cable and the connection of the electrical cable to the transducer housing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU65496/94A AU6549694A (en) | 1993-03-10 | 1994-02-28 | Transducer housing with a calibration port |
| JP52007494A JP3157834B2 (en) | 1993-03-10 | 1994-02-28 | Transducer housing with calibration port |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/028,997 US5273047A (en) | 1993-03-10 | 1993-03-10 | Transducer housing with a calibration port |
| US08/028,997 | 1993-03-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1994020016A1 WO1994020016A1 (en) | 1994-09-15 |
| WO1994020016B1 true WO1994020016B1 (en) | 1994-10-27 |
Family
ID=21846662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1994/002094 WO1994020016A1 (en) | 1993-03-10 | 1994-02-28 | Transducer housing with a calibration port |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5273047A (en) |
| JP (1) | JP3157834B2 (en) |
| AU (1) | AU6549694A (en) |
| WO (1) | WO1994020016A1 (en) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5517846A (en) * | 1994-02-18 | 1996-05-21 | Caggiani; Carlos A. | Electronic vacuum sensor |
| US5711302A (en) * | 1994-03-03 | 1998-01-27 | Merit Medical Systems, Inc. | Disposable transducer with digital processing and readout |
| WO1997034523A1 (en) * | 1996-03-19 | 1997-09-25 | Michael Petermeyer | Pressure-measuring device for invasive blood pressure measurement |
| FR2748564B1 (en) * | 1996-05-10 | 1998-07-31 | Corneal Ind | DEVICE FOR MEASURING THE PRESSURE OF A LIQUID FLOWING IN A TUBE TOWARDS OR OUTSIDE THE HUMAN BODY |
| US6056697A (en) * | 1997-09-29 | 2000-05-02 | The United States Of America As Represented By The Secretary Of The Air Force | Pressure catheter calibration chamber |
| US6635020B2 (en) * | 2001-06-26 | 2003-10-21 | Thermometrics | Reusable fluid pressure transducer monitoring apparatus |
| US20070161970A1 (en) * | 2004-04-16 | 2007-07-12 | Medrad, Inc. | Fluid Delivery System, Fluid Path Set, and Pressure Isolation Mechanism with Hemodynamic Pressure Dampening Correction |
| US20080154214A1 (en) | 2006-12-22 | 2008-06-26 | Medrad, Inc. | Flow Based Pressure Isolation and Fluid Delivery System Including Flow Based Pressure Isolation |
| NL1021054C1 (en) * | 2002-07-12 | 2004-01-13 | Best Medical Internat Beheer B | Universal measuring device for medical application. |
| US7976475B2 (en) * | 2003-09-12 | 2011-07-12 | Laborie Medical Technologies, Inc. | Method for preparation and use of a two part medical measurement device |
| US6993954B1 (en) | 2004-07-27 | 2006-02-07 | Tekscan, Incorporated | Sensor equilibration and calibration system and method |
| DE102007048880B4 (en) * | 2007-10-11 | 2009-07-30 | Up Management Gmbh | A sphygmomanometer and method of operating a sphygmomanometer |
| WO2014160300A1 (en) * | 2013-03-13 | 2014-10-02 | Stimpson Philip G | A catheter assembly |
| US9433427B2 (en) | 2014-04-08 | 2016-09-06 | Incuvate, Llc | Systems and methods for management of thrombosis |
| US9248221B2 (en) | 2014-04-08 | 2016-02-02 | Incuvate, Llc | Aspiration monitoring system and method |
| KR101641995B1 (en) * | 2014-12-22 | 2016-07-25 | 주식회사 효성 | Heat radiating apparatus having double radiation fin |
| US10702292B2 (en) | 2015-08-28 | 2020-07-07 | Incuvate, Llc | Aspiration monitoring system and method |
| US20170100142A1 (en) | 2015-10-09 | 2017-04-13 | Incuvate, Llc | Systems and methods for management of thrombosis |
| US10226263B2 (en) | 2015-12-23 | 2019-03-12 | Incuvate, Llc | Aspiration monitoring system and method |
| KR101834751B1 (en) | 2016-06-30 | 2018-03-06 | 주식회사 에이텍에이피 | Media recognizing apparatus and financial device |
| CN106730090A (en) * | 2016-12-13 | 2017-05-31 | 中国船舶重工集团公司第七六研究所 | Automated peritoneal dialysis machine pressure sensor condition checkout gear and method |
| EP3631810A1 (en) | 2017-05-26 | 2020-04-08 | Bayer Healthcare LLC | Injector state logic with hemodynamic monitoring |
| US11156522B2 (en) | 2019-03-29 | 2021-10-26 | Honeywell International Inc. | Radial seal for disposable force sensor |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3628526A (en) * | 1969-04-14 | 1971-12-21 | Du Pont | Physiologic fluid pressure sensor head |
| US4557269A (en) * | 1983-06-22 | 1985-12-10 | Abbott Laboratories | Disposable transducer apparatus for an electromanometry system |
| US4576181A (en) * | 1984-05-09 | 1986-03-18 | Utah Medical Products | Disposable pressure transducer apparatus for medical use |
| US4610256A (en) * | 1984-09-25 | 1986-09-09 | Utah Medical Products, Inc. | Pressure transducer |
| US4672974A (en) * | 1985-06-14 | 1987-06-16 | Lee Arnold St J | Method and apparatus for "zeroing" and calibrating a catheter-tip gauge-pressure transducer |
| US4920972A (en) * | 1987-01-27 | 1990-05-01 | Medex, Inc. | Gel-filled blood pressure transducer |
| US4873986A (en) * | 1987-04-01 | 1989-10-17 | Utah Medical Products | Disposable apparatus for monitoring intrauterine pressure and fetal heart rate |
| US4825876A (en) * | 1988-02-23 | 1989-05-02 | Abbott Laboratories | Encapsulated blood pressure transducer |
| JPH02291838A (en) * | 1989-05-02 | 1990-12-03 | Nec Corp | Disposable blood pressure transducer |
-
1993
- 1993-03-10 US US08/028,997 patent/US5273047A/en not_active Expired - Lifetime
-
1994
- 1994-02-28 AU AU65496/94A patent/AU6549694A/en not_active Abandoned
- 1994-02-28 JP JP52007494A patent/JP3157834B2/en not_active Expired - Lifetime
- 1994-02-28 WO PCT/US1994/002094 patent/WO1994020016A1/en active Application Filing
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