US3648687A - Disposable blood pressure monitor - Google Patents
Disposable blood pressure monitor Download PDFInfo
- Publication number
- US3648687A US3648687A US881121A US3648687DA US3648687A US 3648687 A US3648687 A US 3648687A US 881121 A US881121 A US 881121A US 3648687D A US3648687D A US 3648687DA US 3648687 A US3648687 A US 3648687A
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- Prior art keywords
- tubular structure
- stopper
- blood pressure
- hole
- pressure monitor
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- Expired - Lifetime
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
Definitions
- ABSTRACT A disposable blood pressure monitor comprising an elongated tubular structure having means on one end of the tubular structure adapted to place the interior of the tubular structure in direct communication with the blood system to be moni tored and a one-hole tubular stopper frictionally engaging the other end of the tubular structure.
- a flexible sacklike membrane is received in the same end of the tubular structure as the one-hole tubular stopper and positioned therein separating the tubular structure into first and second chambers so that the one-hole tubular stopper engages the end of the tubular structure with the peripheral edge of the membrane sealingly positioned between the internal surface of the tubular structure and the external surface of the stopper.
- a flexible retaining means is sealed over the top of the stopper and is afiixed to the external surface of the structure to prevent accidental dislodging of the stopper.
- Pressure indicating means are attachably and sealably received within the hole of the one-hole stopper.
- the present invention relates to an improved blood pressure monitor for monitoring intra-arterial blood pressure.
- the improvement represented by this blood pressure monitor over prior art is such that the blood pressure monitor is simply constructed and is disposable after use.
- Blood pressure is an important parameter in many surgical and medical procedures, both clinical and experimental, and many means are available for its measurement. The accuracy, expense, cleaning and ease of operation of these instruments vary considerably. The ideal instrument would be inexpensive, disposable, accurate, and easily used.
- intra-arterial blood pressure is normally monitored by means of electronic monitoring equipment costing many hundreds of dollars.
- a new blood pressure monitor was produced.
- the design of this new blood pressure monitor is such that its construction requires screw fittings and close tolerances. This type of construction produces an expensive apparatus which is not disposable and must be reused.
- the present art consists only of expensive blood pressure monitors which must be hand disassembled, cleaned, reassembled and sterilized. Because both the device and its maintenance are expensive, intra-arterial blood pressure is quite often not monitored when it would be advantageous for the patient to have it monitored.
- the present invention by suitable inovative modifications to existing blood pressure monitors arrives at a simple design which is both accurate and easily constructed; allowing it to be sold for a price which enables it to be disposed of after use, thus saving maintenance and sterilization costs.
- Another novelty of the present invention is that the aneroid manometer or pressure indicating means which is the indicating portion of the blood pressure monitor is supplied by the user. This supply of the aneroid pressure sensing means by the user represents no difficulty in that the aneroid pressure sensing means is a standard item in the hospital and is generally ubiquitous. Prior to using the blood pressure monitor the user inserts the hollow stem of the aneroid pressure sensing means into the hole in the top of the present invention.
- the aneroid pressure sensing means and the blood pressure monitor are separated simply by pulling them apart and the monitor itself is discarded.
- the aneroid pressure sensing means is, of course, saved for future use.
- the invention resides in the simple design of a blood pressure monitor which allows the user to employ his own gauge and to dispose of the monitor after use.
- FIG. 1 is a perspective view of the transparent plastic blood pressure monitor assembled with the aneroid pressure sensing means.
- FIG. 2 is a front partial view of the invention with a partial sectional view of the blood pressure monitor.
- FIG. 3 is a top plan view of the invention in a partially assembled form with the stopper securing rectangle.
- the invention comprises a tubular structure constructed of transparent plastic so that one may view the contents at all times.
- the lower end of the tubular structure is drawn to a smaller diameter 1 and it is to this smaller diameter that the cannula from within the patients artery is connected.
- An elongated flexible membrane 3 is inserted in the inside of the tubular structure 9, and is held tightly in place at the upper end of the tubular structure by means of a one-hole rubber stopper 6 having a portion 68 which is in the barrel of the device.
- the flexible membrane 3 is prevented from dislodging by having the outside diameter of the one-hole stopper portion 68 slightly larger than the inside diameter of the tube 9.
- the membrane thus divides the tube into two distinct and separate chambers 2 and 4.
- the plastic rectangle 10 is aligned so that its center hole 14 and the hole in the stopper 7 are in register and the rectangle 10 is then folded at each end along the sides of the tubular structure 9 and suitably afiixed to the tubular structure 9 by a self-locking plastic tie 8 looped through the two holes 13 on each end.
- a self-locking plastic tie 8 looped through the two holes 13 on each end.
- the aneroid pressure sensing means is prevented from dislodgement during use by having the hole in the stopper 7 slightly smaller than the stem 12 of the aneroid pressure sensing means which will thus be retained in place by friction.
- the center hole 14 in the flexible rectangular piece 10 which retains the stopper is made the size of the stem of the aneroid pressure sensing means at its smallest diameter. Since the majority of aneroid pressure sensing means have a stem 12 which is constructed as in FIG. 2, when the aneroid pressure sensing means is inserted it will pup" through the center hole 114 of flexible rectangular piece 10 and. will be locked in place by this self-retaining mechanism should the aneroid pressure sensing means be inadvertently jarred or partially dislodged.
- the system thus assembled when connected to the arterial or venous blood supply of the patient will accurately indicate the pressure within the vascular channel that is cannulated.
- the aneroid is removed by forcefully pulling it ofi the tubular structure and the tubular structure is then discarded. Since this forceful removal of the aneroid will partially destroy the monitor it will thus be impossible to mistake a new unused blood pressure monitor with one which had been used and hence is contaminated. This obvious identification of a used device would prevent possible infection through use of a contaminated device.
- a disposable blood pressure monitor comprising an elongated tubular structure; means on one end of said tubular structure adapted to place the interior of said tubular structure in direct communication with the blood system to be monitored; a flexible sacklike membrane received within the other end of said tubular structure, said membrane separating said tubular structure into first and second chambers; a onehole tubular stopper frictionally engaging said other end of said tubular structure with the peripheral edge of said membrane sealingly positioned between the internal surface of said tubular structure and the external surface of said stopper; a flexible plastic retaining means folded over the top of said stopper and affixed to the external surface of said tubular structure to prevent accidental dislodging of said stopper; and pressure indicating means detachably and sealingly received within the hole of said onehole' stopper.
- a disposable blood pressure monitor as claimed in claim I wherein said one-hole stopper has a diameter greater than the inside diameter of said tubular structure.
- a disposable blood pressure monitor as claimed in claim I wherein said flexible plastic retaining means is rectangular and defines a plurality of holes therein.
Abstract
A disposable blood pressure monitor comprising an elongated tubular structure having means on one end of the tubular structure adapted to place the interior of the tubular structure in direct communication with the blood system to be monitored and a one-hole tubular stopper frictionally engaging the other end of the tubular structure. A flexible sacklike membrane is received in the same end of the tubular structure as the one-hole tubular stopper and positioned therein separating the tubular structure into first and second chambers so that the one-hole tubular stopper engages the end of the tubular structure with the peripheral edge of the membrane sealingly positioned between the internal surface of the tubular structure and the external surface of the stopper. A flexible retaining means is sealed over the top of the stopper and is affixed to the external surface of the structure to prevent accidental dislodging of the stopper. Pressure indicating means are attachably and sealably received within the hole of the one-hole stopper.
Description
United States Patent [151 s,4s,ss7
Ramsey, 111 air. 14, 11972 [54] DISPOSABLE BLOOD PRESSURE OTHER PUBLICATIONS [72] Inventor: Maynard Ramsey, 111, Durham, NC.
[73] Assignee: Ramtech, 1nc., Tampa, Fla.
[22] Filed: Dec. 1, 1969 [21] Appl. No.: 881,121
[52] US. Cl. ..128/2.05 D, 73/409 [51] Int. Cl. [58] Field of Search Z- i l 5, 2 1 5/ 2 [56] References Cited UNITED STATES PATENTS 2,066,889 1/1937 Kay ..215/82 X 2,600,324 6/1952 Rappaport..... ..128/2.05 D 2,618,977 1 1/1952 Hottenroth ..73/409 2,648,328 8/1953 Hathaway et a1. ..128/2.05 D 2,660,890 12/ 1953 Fletcher ..73/409 2,772,014 11/1956 Clark ..215/82 2,808,] 78 10/1957 Grado et a1. ..2l5/82 X 2,866,453 12/1958 .lewett ..128/2.05 D 3,099,262 7/1963 Bigliano. ..128/2.05 E 3,301,064 1/1967 Kisling .....73/406 X 3,418,853 12/1968 Curtis ..128/2.05 B
MONITOR FOREIGN PATENTS OR APPLICATIONS Great Britain ..215/82 Anesthesiology, Nov. Dec. 1957, pp. 906 907. Surgery, Vol.61, 1967, May, pp. 71 1- 712 Primary ExaminerKyle L. Howell Attorney-J. Gipple, M. Fleit, H. B. Jacobson, Jr., R. D. Cohn, J. S. I-Iale, D. A. Kettlestrings and D. Price [57] ABSTRACT A disposable blood pressure monitor comprising an elongated tubular structure having means on one end of the tubular structure adapted to place the interior of the tubular structure in direct communication with the blood system to be moni tored and a one-hole tubular stopper frictionally engaging the other end of the tubular structure. A flexible sacklike membrane is received in the same end of the tubular structure as the one-hole tubular stopper and positioned therein separating the tubular structure into first and second chambers so that the one-hole tubular stopper engages the end of the tubular structure with the peripheral edge of the membrane sealingly positioned between the internal surface of the tubular structure and the external surface of the stopper. A flexible retaining means is sealed over the top of the stopper and is afiixed to the external surface of the structure to prevent accidental dislodging of the stopper. Pressure indicating means are attachably and sealably received within the hole of the one-hole stopper.
5 Claims, 3 Drawing Figures Patented March 14, 1972 3,648,687
Maynard Ramsey INVENTOR ATTORNEY DISPOSABLE BLOOD PRESSURE MONITOR The present invention relates to an improved blood pressure monitor for monitoring intra-arterial blood pressure. The improvement represented by this blood pressure monitor over prior art is such that the blood pressure monitor is simply constructed and is disposable after use.
Blood pressure is an important parameter in many surgical and medical procedures, both clinical and experimental, and many means are available for its measurement. The accuracy, expense, cleaning and ease of operation of these instruments vary considerably. The ideal instrument would be inexpensive, disposable, accurate, and easily used. At present intra-arterial blood pressure is normally monitored by means of electronic monitoring equipment costing many hundreds of dollars. In one attempt to alleviate this cost problem associated with intra-arterial blood pressure monitoring a new blood pressure monitor was produced. The design of this new blood pressure monitor is such that its construction requires screw fittings and close tolerances. This type of construction produces an expensive apparatus which is not disposable and must be reused. Thus the present art consists only of expensive blood pressure monitors which must be hand disassembled, cleaned, reassembled and sterilized. Because both the device and its maintenance are expensive, intra-arterial blood pressure is quite often not monitored when it would be advantageous for the patient to have it monitored.
The present invention by suitable inovative modifications to existing blood pressure monitors arrives at a simple design which is both accurate and easily constructed; allowing it to be sold for a price which enables it to be disposed of after use, thus saving maintenance and sterilization costs. Another novelty of the present invention is that the aneroid manometer or pressure indicating means which is the indicating portion of the blood pressure monitor is supplied by the user. This supply of the aneroid pressure sensing means by the user represents no difficulty in that the aneroid pressure sensing means is a standard item in the hospital and is generally ubiquitous. Prior to using the blood pressure monitor the user inserts the hollow stem of the aneroid pressure sensing means into the hole in the top of the present invention. After use, the aneroid pressure sensing means and the blood pressure monitor are separated simply by pulling them apart and the monitor itself is discarded. The aneroid pressure sensing means is, of course, saved for future use. In summary, the invention resides in the simple design of a blood pressure monitor which allows the user to employ his own gauge and to dispose of the monitor after use.
In the drawings which illustrate the preferred construction and organization of the invention,
FIG. 1 is a perspective view of the transparent plastic blood pressure monitor assembled with the aneroid pressure sensing means.
FIG. 2 is a front partial view of the invention with a partial sectional view of the blood pressure monitor.
FIG. 3 is a top plan view of the invention in a partially assembled form with the stopper securing rectangle.
As illustrated in FIGS. 1 and 2, the invention comprises a tubular structure constructed of transparent plastic so that one may view the contents at all times. The lower end of the tubular structure is drawn to a smaller diameter 1 and it is to this smaller diameter that the cannula from within the patients artery is connected. An elongated flexible membrane 3 is inserted in the inside of the tubular structure 9, and is held tightly in place at the upper end of the tubular structure by means of a one-hole rubber stopper 6 having a portion 68 which is in the barrel of the device. Thus, the flexible membrane 3 is prevented from dislodging by having the outside diameter of the one-hole stopper portion 68 slightly larger than the inside diameter of the tube 9. The membrane thus divides the tube into two distinct and separate chambers 2 and 4. Thus, when the smaller diameter end 1 is connected to the source of pressure, that is, the patients arterial or venous blood system, there will be equal pressures in chambers 2 and 4 although they will be kept separate by the flexible membrane 3. Since in operation there will be a pressure within the tubular structure, some means other than the friction of the one-hole stopper portion 68 on the sides of the membrane 3 and tubular structure 9 must be employed in order to prevent ejection of the stopper. This retaining function is accomplished by the flexible plastic rectangle 10 illustrated in FIGS. 1 and 3. The plastic rectangle 10 is aligned so that its center hole 14 and the hole in the stopper 7 are in register and the rectangle 10 is then folded at each end along the sides of the tubular structure 9 and suitably afiixed to the tubular structure 9 by a self-locking plastic tie 8 looped through the two holes 13 on each end. Thus, when the tie 8 is snugged tight around the barrel the flexible rectangle 10 will be affixed to the barrel and prevent the ejection of the stopper. The flange portion 5 of the blood pressure monitor extending from the sides of the tube is integral with the tubular structure 9 and thus serves to prevent the tie 8 from slipping off the top of the tubular structure. Prior to use the aneroid pressure sensing means 11 is inserted into the hole in the stopper 7. The aneroid pressure sensing means is prevented from dislodgement during use by having the hole in the stopper 7 slightly smaller than the stem 12 of the aneroid pressure sensing means which will thus be retained in place by friction. As a safety measure, the center hole 14 in the flexible rectangular piece 10 which retains the stopper is made the size of the stem of the aneroid pressure sensing means at its smallest diameter. Since the majority of aneroid pressure sensing means have a stem 12 which is constructed as in FIG. 2, when the aneroid pressure sensing means is inserted it will pup" through the center hole 114 of flexible rectangular piece 10 and. will be locked in place by this self-retaining mechanism should the aneroid pressure sensing means be inadvertently jarred or partially dislodged.
The system thus assembled when connected to the arterial or venous blood supply of the patient will accurately indicate the pressure within the vascular channel that is cannulated. After use the aneroid is removed by forcefully pulling it ofi the tubular structure and the tubular structure is then discarded. Since this forceful removal of the aneroid will partially destroy the monitor it will thus be impossible to mistake a new unused blood pressure monitor with one which had been used and hence is contaminated. This obvious identification of a used device would prevent possible infection through use of a contaminated device.
It is readily apparent from the foregoing that the simplicity of use and its disposability make the present invention in many ways more desirable than present art.
What is claimed is:
I. A disposable blood pressure monitor comprising an elongated tubular structure; means on one end of said tubular structure adapted to place the interior of said tubular structure in direct communication with the blood system to be monitored; a flexible sacklike membrane received within the other end of said tubular structure, said membrane separating said tubular structure into first and second chambers; a onehole tubular stopper frictionally engaging said other end of said tubular structure with the peripheral edge of said membrane sealingly positioned between the internal surface of said tubular structure and the external surface of said stopper; a flexible plastic retaining means folded over the top of said stopper and affixed to the external surface of said tubular structure to prevent accidental dislodging of said stopper; and pressure indicating means detachably and sealingly received within the hole of said onehole' stopper.
2. A disposable blood pressure monitor as claimed in claim I, wherein said one-hole stopper has a diameter greater than the inside diameter of said tubular structure.
3. A disposable blood pressure monitor as claimed in claim ll, wherein said stopper is rubber.
4. A disposable blood pressure monitor as claimed in claim I, wherein said flexible plastic retaining means is rectangular and defines a plurality of holes therein.
5. A disposable blood pressure monitor as claimed in claim 4, wherein said rectangular plastic retaining means includes a plastic tie.
Claims (5)
1. A disposable blood pressure monitor comprising an elongated tubular structure; means on one end of said tubular structure adapted to place the interior of said tubular structure in direct communication with the blood system to be monitored; a flexible sacklike membrane received within the other end of said tubular structure, said membrane separating said tubular structure into first and second chambers; a one-hole tubular stopper frictionally engaging said other end of said tubular structure with the peripheral edge of said membrane sealingly positioned between the internal surface of said tubular structure and the external surface of said stopper; a flexible plastic retaining means folded over the top of said stopper and affixed to the external surface of said tubular structure to prevent accidental dislodging of said stopper; and pressure indicating means detachably and sealingly received within the hole of said onehole stopper.
2. A disposable blood pressure monitor as claimed in claim 1, wherein said one-hole stopper has a diameter greater than the inside diameter of said tubular structure.
3. A disposable blood pressure monitor as claimed in claim 1, wherein said stopper is rubber.
4. A disposable blood pressure monitor as claimed in claim 1, wherein said flexible plastic retaining means is rectangular and defines a plurality of holes therein.
5. A disposable blood pressure monitor as claimed in claim 4, wherein said rectangular plastic retaining means includes a plastic tie.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US88112169A | 1969-12-01 | 1969-12-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3648687A true US3648687A (en) | 1972-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US881121A Expired - Lifetime US3648687A (en) | 1969-12-01 | 1969-12-01 | Disposable blood pressure monitor |
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| Country | Link |
|---|---|
| US (1) | US3648687A (en) |
Cited By (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2186645A1 (en) * | 1972-06-01 | 1974-01-11 | Gambro Ag | |
| US3890842A (en) * | 1974-04-23 | 1975-06-24 | Ramtech | Disposable manometer |
| US3890962A (en) * | 1970-10-28 | 1975-06-24 | Ramtech | Disposable manometer |
| US4160448A (en) * | 1977-05-23 | 1979-07-10 | Jackson Richard R | Blood pressure measuring catheter |
| WO1982002657A1 (en) * | 1981-02-02 | 1982-08-19 | Miller William | Physiological pressure measuring system |
| US4545389A (en) * | 1982-07-14 | 1985-10-08 | Gould Inc. | Disposable physiological pressure sensing system |
| US4557269A (en) * | 1983-06-22 | 1985-12-10 | Abbott Laboratories | Disposable transducer apparatus for an electromanometry system |
| US4727887A (en) * | 1985-07-08 | 1988-03-01 | Habley Medical Technology Corporation | Hypodermic manometer |
| US4820265A (en) * | 1986-12-16 | 1989-04-11 | Minnesota Mining And Manufacturing Company | Tubing set |
| USRE33360E (en) * | 1983-06-22 | 1990-10-02 | Abbott Laboratories | Disposable transducer apparatus for an electromanometry system |
| US5293780A (en) * | 1992-04-21 | 1994-03-15 | Chadwick Harold D | Head-gauge/tank-bladder |
| US20060155196A1 (en) * | 2005-01-10 | 2006-07-13 | Maynard Ramsey | Integrated manual mechanical and electronic sphygmomanometer within a single enclosure |
| US7658196B2 (en) | 2005-02-24 | 2010-02-09 | Ethicon Endo-Surgery, Inc. | System and method for determining implanted device orientation |
| US7775966B2 (en) | 2005-02-24 | 2010-08-17 | Ethicon Endo-Surgery, Inc. | Non-invasive pressure measurement in a fluid adjustable restrictive device |
| US7775215B2 (en) | 2005-02-24 | 2010-08-17 | Ethicon Endo-Surgery, Inc. | System and method for determining implanted device positioning and obtaining pressure data |
| US7844342B2 (en) | 2008-02-07 | 2010-11-30 | Ethicon Endo-Surgery, Inc. | Powering implantable restriction systems using light |
| US7927270B2 (en) | 2005-02-24 | 2011-04-19 | Ethicon Endo-Surgery, Inc. | External mechanical pressure sensor for gastric band pressure measurements |
| US8016744B2 (en) | 2005-02-24 | 2011-09-13 | Ethicon Endo-Surgery, Inc. | External pressure-based gastric band adjustment system and method |
| US8016745B2 (en) | 2005-02-24 | 2011-09-13 | Ethicon Endo-Surgery, Inc. | Monitoring of a food intake restriction device |
| US8034065B2 (en) | 2008-02-26 | 2011-10-11 | Ethicon Endo-Surgery, Inc. | Controlling pressure in adjustable restriction devices |
| US8057492B2 (en) | 2008-02-12 | 2011-11-15 | Ethicon Endo-Surgery, Inc. | Automatically adjusting band system with MEMS pump |
| US8066629B2 (en) | 2005-02-24 | 2011-11-29 | Ethicon Endo-Surgery, Inc. | Apparatus for adjustment and sensing of gastric band pressure |
| US8100870B2 (en) | 2007-12-14 | 2012-01-24 | Ethicon Endo-Surgery, Inc. | Adjustable height gastric restriction devices and methods |
| US8114345B2 (en) | 2008-02-08 | 2012-02-14 | Ethicon Endo-Surgery, Inc. | System and method of sterilizing an implantable medical device |
| US8142452B2 (en) | 2007-12-27 | 2012-03-27 | Ethicon Endo-Surgery, Inc. | Controlling pressure in adjustable restriction devices |
| US8152710B2 (en) | 2006-04-06 | 2012-04-10 | Ethicon Endo-Surgery, Inc. | Physiological parameter analysis for an implantable restriction device and a data logger |
| US8187163B2 (en) | 2007-12-10 | 2012-05-29 | Ethicon Endo-Surgery, Inc. | Methods for implanting a gastric restriction device |
| US8187162B2 (en) | 2008-03-06 | 2012-05-29 | Ethicon Endo-Surgery, Inc. | Reorientation port |
| US8192350B2 (en) | 2008-01-28 | 2012-06-05 | Ethicon Endo-Surgery, Inc. | Methods and devices for measuring impedance in a gastric restriction system |
| US8221439B2 (en) | 2008-02-07 | 2012-07-17 | Ethicon Endo-Surgery, Inc. | Powering implantable restriction systems using kinetic motion |
| US8233995B2 (en) | 2008-03-06 | 2012-07-31 | Ethicon Endo-Surgery, Inc. | System and method of aligning an implantable antenna |
| US8337389B2 (en) | 2008-01-28 | 2012-12-25 | Ethicon Endo-Surgery, Inc. | Methods and devices for diagnosing performance of a gastric restriction system |
| US8377079B2 (en) | 2007-12-27 | 2013-02-19 | Ethicon Endo-Surgery, Inc. | Constant force mechanisms for regulating restriction devices |
| US8591395B2 (en) | 2008-01-28 | 2013-11-26 | Ethicon Endo-Surgery, Inc. | Gastric restriction device data handling devices and methods |
| US8591532B2 (en) | 2008-02-12 | 2013-11-26 | Ethicon Endo-Sugery, Inc. | Automatically adjusting band system |
| US8870742B2 (en) | 2006-04-06 | 2014-10-28 | Ethicon Endo-Surgery, Inc. | GUI for an implantable restriction device and a data logger |
| US9421349B2 (en) | 2012-01-12 | 2016-08-23 | Stuart H. Miller | Angioplasty pressure transducer |
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Cited By (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3890962A (en) * | 1970-10-28 | 1975-06-24 | Ramtech | Disposable manometer |
| FR2186645A1 (en) * | 1972-06-01 | 1974-01-11 | Gambro Ag | |
| US3890842A (en) * | 1974-04-23 | 1975-06-24 | Ramtech | Disposable manometer |
| US4160448A (en) * | 1977-05-23 | 1979-07-10 | Jackson Richard R | Blood pressure measuring catheter |
| US4648406A (en) * | 1981-02-02 | 1987-03-10 | Michael Ebert | Physiological pressure measuring system |
| WO1982002657A1 (en) * | 1981-02-02 | 1982-08-19 | Miller William | Physiological pressure measuring system |
| US4545389A (en) * | 1982-07-14 | 1985-10-08 | Gould Inc. | Disposable physiological pressure sensing system |
| US4557269A (en) * | 1983-06-22 | 1985-12-10 | Abbott Laboratories | Disposable transducer apparatus for an electromanometry system |
| USRE33360E (en) * | 1983-06-22 | 1990-10-02 | Abbott Laboratories | Disposable transducer apparatus for an electromanometry system |
| US4727887A (en) * | 1985-07-08 | 1988-03-01 | Habley Medical Technology Corporation | Hypodermic manometer |
| US4820265A (en) * | 1986-12-16 | 1989-04-11 | Minnesota Mining And Manufacturing Company | Tubing set |
| US5293780A (en) * | 1992-04-21 | 1994-03-15 | Chadwick Harold D | Head-gauge/tank-bladder |
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| AS | Assignment |
Owner name: CRITIKON, INC.; A CORP OF NJ., NEW JERSEY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JOHNSON & JOHNSON;REEL/FRAME:004093/0098 Effective date: 19830204 Owner name: CRITIKON, INC.; A CORP OF NJ. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JOHNSON & JOHNSON;REEL/FRAME:004093/0098 Effective date: 19830204 |