EP0808186A1 - Appareil a valve - Google Patents
Appareil a valveInfo
- Publication number
- EP0808186A1 EP0808186A1 EP95910278A EP95910278A EP0808186A1 EP 0808186 A1 EP0808186 A1 EP 0808186A1 EP 95910278 A EP95910278 A EP 95910278A EP 95910278 A EP95910278 A EP 95910278A EP 0808186 A1 EP0808186 A1 EP 0808186A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- valve member
- orifices
- orifice
- bypass passageway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0473—Multiple-way safety valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/60—Containers for suction drainage, adapted to be used with an external suction source
- A61M1/63—Containers for suction drainage, adapted to be used with an external suction source with means for emptying the suction container, e.g. by interrupting suction
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/71—Suction drainage systems
- A61M1/77—Suction-irrigation systems
- A61M1/772—Suction-irrigation systems operating alternately
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
- F16K11/044—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with movable valve members positioned between valve seats
Definitions
- the invention relates to paracentesis and lavage valves operable solely by mechanical (including magnetic) and hydraulic forces; and a method for using such valves.
- the medical procedure for irrigation or lavage of organs, joints or cavities required manual manipulation of a three-way valve. Together, with the requisite needle, syringe, vacuum source and tubing, the three-way valve would first be manually manipulated to direct the laving fluid into the patient; then again manually manipulated to allow expulsion of the fluid from the patient.
- the disadvantages of this procedure include patient discomfort, improper valve manipulation, valve jamming (as with gloves, etc.) and the risk of torn gloves and subsequent infection.
- the medical procedure known as paracentesis is tedious and potentially dangerous.
- the procedure normally entails insertion of a syringe or trocar into a body cavity, for example the thoracic or abdominal cavities and subsequent fluid removal or drainage from such cavity.
- U.S. patents are exemplary of the prior art valves and procedure: U.S. Patent No. 4,844,087 to Garg, entitled First Method for Using Cannula Including a Valve Structure and Associated Instrument Element; U.S. Patent No. 4,447,235 to Clarke, entitled Thoracentesis Device; U.S. Patent No. 4,784,156 to Garg, entitled Cannula Including a Valve Structure and Associated Instrument Elements and Method for Using Same; U.S. Patent No. 4,840,184 to Garg, entitled Second Method for Using Cannula Including a Valve Structure and Associated Instrument Elements; and U.S. Patent No.
- U.S. Patent No. 3,957,052, to Topham, entitled Pumping-Syringe discloses a T-passageway valve configuration for withdrawing and pumping fluids. Ball check valves are used.
- U.S. Patent No. 4,051,852, to Villari discloses ball, flap and cylindrical check valve member embodiments for withdrawing body fluids and thereafter pumping them into suitable collection bags.
- U.S. Patent No. 657,440 to McCaw, entitled Aspirator discloses similar structure.
- Apparatus does disclose a respiratory valve with a sliding valve member.
- the sliding valve member is magnetically biased, and flow occurs through centrally located orifices in the sliding valve member.
- U.S. Patent No. 3,877,616, to Stevens, entitled Pump With Unitary Valve Member discloses a reciprocating valve member with upper and lower resilient check valves.
- U.S. Patent No. 4,592,382, to Rubin, et al . , entitled Anti-Sip ⁇ on Nozzle discloses an unbiased slidable valve member.
- valve apparatus comprises a valve body.
- the valve body comprises first, second and third orifices and a bypass passageway.
- a valve member comprising first and second end portions is movable within the valve body.
- the bypass passageway comprises an aperture and a pressure relief valve is disposed in the aperture.
- a check valve is disposed in the aperture.
- a check valve is disposed in the third orifice.
- a method for using a valve comprising the steps of providing a valve body comprising first, second and third orifices and a bypass passageway; providing a valve member comprising first and second end portions, and moveable in the valve body.
- the method moves the valve member solely by hydraulic pressure. Applying negative hydraulic pressure to the first end of the movable valve member forces fluid through the first and second orifices while closing the third orifice. Applying positive hydraulic pressure to the first end of the movable valve member forces fluid through the first and third orifices while closing the second orifice and the bypass passageway.
- the method further comprises a cylindrical center portion, and the first and second end portion comprise first and second truncated cone end portions.
- the valve body comprises a hollow central portion complementary in configuration to the valve member.
- the structure for biasing the valve member comprises structure for biasing the valve member into occluding the first orifice and bypass passageway while opening the second and third orifices.
- the biasing structure may comprise a helical spring, an annular spring or magnets structure. Applying pressure to the first end portion opens the first orifice and bypass passageway while occluding the third orifice.
- the structure for applying pressure comprises structure for applying hydraulic pressure, thereby directing fluid flow through the first and second orifices and the bypass passageway.
- the bypass passageway comprises an aperture and a pressure relief valve or a pressure gauge is disposed in the aperture.
- a primary object of the present invention is the provision of a hydraulically operated paracentesis valve.
- Another primary object of the present invention is the provision of a hydraulically and mechanically operated lavage valve. Yet another object of the invention is the provision of paracentesis valves which reduce patient discomfort and the possibility of operator error.
- Still another object of the invention is the provision of improved methods for valve procedures.
- An advantage of the present invention is the elimination of manual manipulation of a three-way valve.
- Another advantage of the present invention is the lessening of time, effort and fatigue in performing paracentesis and lavage procedures.
- Still another advantage of the present invention is the provision of safe and efficient valve methods.
- Fig. 1 is a cross-section of the preferred paracentesis embodiment of the invention with negative hydraulic pressure applied;
- Fig. 2 is a cross-section of the preferred paracentesis embodiment of the invention with positive hydraulic pressure applied;
- Fig. 3 is a perspective view of a pressure relief valve usable in combination with the preferred paracentesis embodiment;
- Fig. 4 is a perspective view of a pressure gauge usable in combination with the preferred paracentesis embodiment
- Fig. 5 is a cross-section of the preferred lavage embodiment of the invention with hydraulic pressure applied;
- Fig. 6 is a cross-section of the preferred lavage embodiment of the invention with mechanical force applied;
- Fig. 7 is a cross-section of another lavage embodiment of the invention.
- Fig. 8 is a cross-section of yet another lavage embodiment of the invention.
- Fig. 9 is a cross-section of still another lavage embodiment of the invention.
- Fig. 10 is a perspective view of a pressure relief valve usable in combination with the Fig. 9 embodiment.
- Fig. 11 is a perspective view of a pressure gauge usable in combination with the Fig. 9 embodiment.
- Paracentesis valve 10 comprises valve body 12.
- Valve body 12 further comprises first, second and third orifices 14, 16 and 18, as well as orifice extensions 14', 16', and 18', respectively.
- Valve body 12 further comprises bypass passageway 20 which bypasses central cavity 22 and interconnects orifices 14 and 16.
- Valve member 24 is positioned within central cavity 22, complementary in configuration to valve member 24 for linear movement therein.
- Valve member 24, complementary in shape to central cavity 22, comprises cylindrical center portion 24' and truncated cone end portions 24'' and 24''', respectively. End portions 24'' and 24''' seat within orifices 14 and 16, respectively, of valve body 12, thereby occluding such orifices. Further, when valve member 24 is in position to occlude orifice 14, orifice 18 is also sealed. Concomitantly, orifice 16 and bypass passageway 20 are also simultaneously occluded when valve member 24 is in its leftmost position (see Fig. 2).
- Orifice 18 (and orifice extension 18') are coupled to a receptacle or sump (not shown).
- Valve 10 may comprise any suitable material compatible with its contemplated medical use. Accordingly, valve 10 may comprise any suitable plastic, stainless steel, aluminum and other such materials known to those ordinarily skilled in the art. If plastics are used, self-lubricating plastics such as nylon or PTFE are preferred in order to facilitate movement of valve member 24 in valve body 12.
- orifice extension 16' is coupled to a hypodermic needle or trocar and cannula for withdrawing fluid from the affected body cavity of the patient.
- Orifice extension 14' is similarly coupled to a syringe barrel or the like, and is initially empty.
- Orifice extension 18' is coupled to a receptacle (not shown) .
- the preferred couplings comprise the well known International Standard Luer conical male or female couplings.
- orifice extension 14', 16' and 18' will comprise a 6° taper, and may also comprise the well known "Luer-LoksTM" coupling.
- Other couplings well known in the art may be employed.
- a hypodermic needle or trocar is coupled to orifice extension 16'
- an empty syringe is coupled to orifice extension 14'.
- the fluid is withdrawn through orifice 14 by manual withdrawal of the syringe piston.
- the negative hydraulic pressure thereby created moves valve member 24 to the right, as shown in Fig. 1.
- the entrance to bypass passageway 20 is opened allowing fluid to flow therethrough, as well as through orifices 16 and 14, to the empty syringe. Withdrawal of fluid continues until the syringe barrel is full; at this point, positive pressure is manually applied to the syringe, thereby evacuating the fluid therefrom.
- FIG. 3 Another embodiment of the invention is depicted in Figs. 3 and 4. These embodiments comprises threaded aperture 34 in valve body 12. Threaded aperture 34 provides communication between bypass passageway 20 and the ambient atmosphere, and primarily serves as a training or monitoring device.
- Fig. 3 depicts a threaded attachment 60 used in combination with aperture 34.
- Attachment 60 comprises a "pop off" or pressure relief valve with stem adapted to be screwed or otherwise secured into aperture 34.
- Pressure relief valve 60 is set to open at a predetermined pressure, for example 21 mm Hg or 20 cm H 2 0.
- a predetermined pressure for example 21 mm Hg or 20 cm H 2 0.
- medical personnel manually applying pressure to the irrigating syringe would thus be encouraged to apply steady, constant pressure (less than a predetermined pressure) to the irrigating syringe; exceeding the predetermined pressure would open the valve and vent the irrigating fluid.
- attachment 70 shown in Fig. 4 also serves as a training or monitoring aid.
- Attachment 70 is a pressure gauge with stem; gauge 70 screws or is otherwise secured into aperture 34, thus affording a visual indication of actual pressure applied to the irrigating syringe. Such visual indication of pressure applied would also tend to encourage steady, uniform application of manual pressure upon the irrigating syringe.
- valve 60 and gauge 70 may be used to secure valve 60 and gauge 70 in valve body 12, including the threaded means depicted.
- a simple check valve may be positioned in orifice 18. Such check valve would only permit flow to the receptacle and would preclude flow from the receptacle.
- the check valve may be of any construction known to the art including, but not limited to ball, flap or cylinder-type valves.
- the paracentesis valve of the present invention is useful whenever fluid removal or drainage of a body space is required. It is particularly useful for thoracentesis procedures.
- Lavage valve 110 comprises valve body 112.
- Valve body 112 further comprises first, second and third orifices 114, 116 and 118, as well as orifice extensions 114', 116', and 118', respectively.
- Valve body 112 further comprises bypass passageway 120 which bypasses central cavity 122 and interconnects orifices 114 and 116.
- Valve member 124 is positioned within central cavity 122, complementary in configuration to valve member 124 for linear movement therein.
- Valve member 124 comprises cylindrical center portion 124' and truncated cone end portions 124'' and 124''', respectively. End portions 124'' and 124''' seat within orifices 114 and 116, respectively, of valve body 112, thereby occluding such orifices. Further, when valve member 124 is in position to occlude orifice 114, bypass passageway 120 is also occluded by end portion 124'', as depicted in Fig. 6.
- Orifice 118 (and orifice extension 118') are coupled to a vacuum source and receptacle or sump (not shown) .
- the vacuum source sucks the irrigating fluid out of the patient, after completion of the procedure, and into the receptacle.
- Valve 110 may comprise any suitable material compatible with its contemplated medical use. Accordingly, valve 110 may comprise any suitable plastic, stainless steel, aluminum and other such materials known to those ordinarily skilled in the art.
- orifice extension 116' is coupled to a hypodermic needle or trocar and cannula for injecting irrigating or laving, fluid into and around the affected body parts of the patient.
- Orifice extension 114' is similarly coupled to a syringe barrel or the like initially containing the irrigating fluid, while orifice extension 118' is coupled to a vacuum source and receptacle (not shown) .
- the preferred couplings comprise the well known International Standard Luer conical male or female couplings.
- orifice extension 114', 116' and 118' will comprise a 6° taper, and may also comprise the well known "Luer-Loks""' coupling.
- Other couplings well known in the art may be employed.
- the preferred embodiment of the invention further comprises biasing means such as, a helical or coil spring 126 positioned between end portion 124''' of valve member 124 and valve body 112.
- Spring 126 normally forces valve member 124 to the right as shown in Fig. 6, thereby occluding and sealing orifice 114 and bypass passageway 120.
- a hypodermic syringe or trocar is coupled to orifice extension 116', while a syringe barrel charged with irrigating fluid is coupled to orifice extension 114'. After insertion of the needle into the patient proximate the body part to be washed, the irrigating fluid is injected through orifice 114.
- valve member 124 occludes orifice 114 and bypass passageway 120. Concomitantly, orifice 118 is opened, thereby permitting vacuum-induced flow of irrigating fluid out of the body into an appropriate receptacle or sump.
- the lavage operation may be repeated as often as required by merely refilling the attached syringe barrel or replacing the empty syringe with a charged syringe. No manual manipulation of the valve itself is required, and leakage will not occur.
- check valve (not shown) may be positioned therein.
- Such check valve would only permit flow of fluid to the receptacle and would preclude flow from the receptacle.
- a simple ball, flap or cylinder-type check valve could be used, as well as any other check valve known to the art.
- Fig. 7 shows another embodiment of the invention.
- the Fig. 7 embodiment is otherwise identical in structure and operation to the preferred embodiment of Figs. 5 and 6 and components are identically numbered.
- Fig. 7 illustrates the provision of annular projection 126' as a biasing spring.
- Projection 126' is centrally mounted and attached to valve member 124.
- Projection 126' resembles a Belleville washer-type spring in function and configuration, and is lodged within annular recess 128 of valve body 112 for coaction therewith.
- annular spring 126' normally biases valve member 124 into occlusion and sealing engagement with orifice 114.
- annular spring 126' inherently prevents fluid passage around it by virtue of its configuration.
- use of annular spring 126' also entails possible reduced cycle life of the valve assembly.
- Fig. 8 illustrates yet another embodiment of the invention.
- the Fig. 8 lavage valve embodiment utilizes magnetic biasing to occlude orifice 114.
- annular permanent magnet 130 attracts magnetic slug 132 resulting in occlusion of orifice 114.
- magnet 130 and magnetic slug 132 may be reversed with slug 132 on valve body 112 and magnet 130 on valve member 124, and, additionally, that magnetic slug 132 may also be polarized (with unlike poles adjacent to poles of magnet 130).
- both magnet 130 and slug 132 should have nonmagnetic layering, such as plastic or stainless steel valve material or other material such as StelliteTM, brass or the like, well known to those skilled in the art.
- Operation of the Fig. 8 embodiment otherwise is similar to the Figs. 5 and 6 preferred embodiment: Permanent magnet 130 and magnetic slug 132 bias valve member 124 into sealing engagement with orifice 114, thereby occluding orifice 114, until such bias is overcome by hydraulic pressure from an attached syringe barrel.
- FIG. 9 Still another embodiment of the invention i ⁇ depicted in Fig. 9.
- the Fig. 9 embodiment comprises threaded aperture 134 in valve body 112. Threaded aperture 134 provides communication between bypass passageway 120 and the ambient atmosphere, and primarily serves as a training or monitoring device.
- Fig. 10 depicts a threaded attachment 160 used in combination with aperture 134.
- Attachment 160 comprises a "pop off" or pressure relief valve with stem adapted to be screwed or otherwise secured into aperture 134.
- Pressure relief valve 160 is set to open at a predetermined pressure, for example 21 mm Hg or 20 cm H 2 0.
- a predetermined pressure for example 21 mm Hg or 20 cm H 2 0.
- medical personnel manually applying pressure to the irrigating syringe would thus be encouraged to apply steady, constant pressure (less than a predetermined pressure) to the irrigating syringe; exceeding the predetermined pressure would open the valve and vent the irrigating fluid.
- attachment 170 shown in Fig. 11 also serves as a training or monitoring aid.
- Attachment 170 is a pressure gauge with stem; gauge 170 screws or is otherwise secured into aperture 134, thus affording a visual indication of actual pressure applied to the irrigating syringe. Such visual indication of pressure applied would also tend to encourage steady, uniform application of manual pressure upon the irrigating syringe.
- valve 160 and gauge 170 in valve body 112 may be used to secure valve 160 and gauge 170 in valve body 112, including the threaded means depicted.
- the lavage valve of the present invention is useful whenever irrigation of an organ, joint or cavity is required, e.g. attachment to bronchoalveolar lavage catheters, for irrigating the urinary bladder, thoracic cavity, gastric cavity, joints, abscesses, cavities and other infected or fluidized body spaces.
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Mechanical Engineering (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Pulmonology (AREA)
- External Artificial Organs (AREA)
Abstract
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/195,757 US5395350A (en) | 1994-02-14 | 1994-02-14 | Paracentesis valve |
US195926 | 1994-02-14 | ||
US08/195,926 US5439022A (en) | 1994-02-14 | 1994-02-14 | Lavage valve |
US195757 | 1994-02-14 | ||
PCT/US1995/001953 WO1995021641A1 (fr) | 1994-02-14 | 1995-02-14 | Appareil a valve |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0808186A1 true EP0808186A1 (fr) | 1997-11-26 |
EP0808186A4 EP0808186A4 (fr) | 1998-04-15 |
Family
ID=26891301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95910278A Withdrawn EP0808186A4 (fr) | 1994-02-14 | 1995-02-14 | Appareil a valve |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0808186A4 (fr) |
AU (1) | AU1845295A (fr) |
WO (1) | WO1995021641A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007003690B4 (de) * | 2007-01-25 | 2009-05-14 | Iprm Intellectual Property Rights Management Ag | Multifunktionsventil |
FR2917803B1 (fr) * | 2007-06-22 | 2009-09-18 | Peugeot Citroen Automobiles Sa | Systeme de clapet d'etancheite |
US9694119B2 (en) | 2012-04-26 | 2017-07-04 | Gyrus Acmi, Inc. | Surgical instrument |
US20130289595A1 (en) * | 2012-04-26 | 2013-10-31 | Gyrus Ent, L.L.C. | Surgical instrument |
ES2625076T3 (es) * | 2012-12-07 | 2017-07-18 | Volvo Truck Corporation | Mecanismo de válvula para un motor de combustión interna, motor de combustión interna y vehículo motorizado |
GB2515451B (en) * | 2013-03-20 | 2016-04-20 | Multilift Wellbore Technology Ltd | Free flow valve |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4447235A (en) * | 1981-05-07 | 1984-05-08 | John M. Clarke | Thoracentesis device |
EP0389818A1 (fr) * | 1989-03-28 | 1990-10-03 | Dexide, Inc. | Dispositif médical d'évacuation et d'irrigation |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1222316A (en) * | 1916-06-24 | 1917-04-10 | Winfred Matthewman | Valve and the like. |
US2764174A (en) * | 1952-01-15 | 1956-09-25 | Wilson John Hart | Quick release valves |
US2721572A (en) * | 1952-09-25 | 1955-10-25 | Gilbert & Barker Mfg Co | Over-inflation signalling device |
US3027907A (en) * | 1957-03-29 | 1962-04-03 | Luther E Lee | Combination valve |
SE385080B (sv) * | 1974-09-11 | 1976-06-08 | Alfa Laval Ab | Anordning vid mjolkningsmaskin |
US4210178A (en) * | 1977-08-10 | 1980-07-01 | Basta Michael I | Perpetual by-pass flushing device |
US4506691A (en) * | 1984-03-28 | 1985-03-26 | Warner-Lambert Company | Three-way valve for automatic sequencing of fluid flow |
US4838866A (en) * | 1986-10-03 | 1989-06-13 | Marshall Sr William M | Liquid pump air release system |
US4782849A (en) * | 1987-02-09 | 1988-11-08 | The Boc Group, Inc. | Control unit for intermittent suction system |
-
1995
- 1995-02-14 WO PCT/US1995/001953 patent/WO1995021641A1/fr not_active Application Discontinuation
- 1995-02-14 EP EP95910278A patent/EP0808186A4/fr not_active Withdrawn
- 1995-02-14 AU AU18452/95A patent/AU1845295A/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4447235A (en) * | 1981-05-07 | 1984-05-08 | John M. Clarke | Thoracentesis device |
EP0389818A1 (fr) * | 1989-03-28 | 1990-10-03 | Dexide, Inc. | Dispositif médical d'évacuation et d'irrigation |
Non-Patent Citations (1)
Title |
---|
See also references of WO9521641A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU1845295A (en) | 1995-08-29 |
WO1995021641A1 (fr) | 1995-08-17 |
EP0808186A4 (fr) | 1998-04-15 |
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