EP0000831A1 - A cannula assembly - Google Patents
A cannula assembly Download PDFInfo
- Publication number
- EP0000831A1 EP0000831A1 EP78300235A EP78300235A EP0000831A1 EP 0000831 A1 EP0000831 A1 EP 0000831A1 EP 78300235 A EP78300235 A EP 78300235A EP 78300235 A EP78300235 A EP 78300235A EP 0000831 A1 EP0000831 A1 EP 0000831A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cannula
- needle
- assembly
- cannulae
- assembly according
- 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.)
- Granted
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Classifications
-
- 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
- A61M5/1582—Double lumen needles
-
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0111—Aseptic insertion devices
-
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
- A61M25/0026—Multi-lumen catheters with stationary elements
- A61M25/003—Multi-lumen catheters with stationary elements characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves
- A61M2025/0031—Multi-lumen catheters with stationary elements characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
-
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
- A61M25/0026—Multi-lumen catheters with stationary elements
- A61M2025/0039—Multi-lumen catheters with stationary elements characterized by lumina being arranged coaxially
Abstract
Description
- The present invention relates to a cannula assembly for medical use and more particularly to a double lumen cannula for independently conducting fluids into and our of a venipuncture site through two separate passageways.
- Double lumen cannulae are well known in the art. The best known advantage offered by double lumen cannulae is the ability to separately withdraw blood from a blood vessel and inject blood back into the same blood vessel through a single venipuncture or fistula. The most common double lumen cannulae consist of a single tube with a horizontal division of the tube which places the lumen of the cannulae in immediate juxtaposition. Unfortunately, however, the construction of such double lumen cannulae is expensive, time-consuming and unreliable.
- The least expensive and most reliable construction of the double lumen cannulae is in the form of concentric cannulae disposed telescopically one within the other. Particularly when using cannulae for single needle dialysis, it is preferred to have one cannula project substantially beyond the other. Attention is directed particularly to the common use of cannulae for single needle dialysis such as that disclosed and described in U.S. Patent 3,756,234. In single needle dialysis, it is highly desirable to withdraw blood from a patient, treat the blood with a hemodialyzer (artificial kidney) and return the blood to the patient through the same fistula in which the blood was withdrawn. Under such circumstances, it is desirable to return the blood a significant distance upstream from where the blood is aspirated so as to minimise the problem of admixing.
- The problems with such telescopic construction are apparent when in is observed that both cannulae must be used to penetrate the skin during venipuncture. Unless there is a smocth contour between the interior and exterior cannula, the venipuncture is both difficult and painful. On the cther hand, if the telescoping cannulae present an exteriorly smooth surface for venipuncture, there is insufficient passageway for fluid to flow easily between them. The structure of a double lumen cannula lends itself admirably to the ability to aspirate blood from a downstream location and to return blood at an upstream location all through the same fistula. However, until this present invention, no suitable double lumen cannula enabling penetration into the blaoodstream and for maintaining separate flow paths through a single fistula has been known,
- The present invention provides a cannula assembly comprising first and second cannulae that define separate flow paths, the second cannula extending, in a fluid transfer condition, concentrically through and forwardly of the first cannula, the assembly being characterised in that a needle is telescopically mounted therein to be displaceable between a position in a puncturing condition of the assembly in which the needle extends through the first cannula forwardly of both the first and second cannulae and a position in the fluid transfer condition of the assembly in which it is withdrawn rearwardly of the forward end of the first cannula, and further characterised in that the needle and first cannula define a smooth exterior surface for venipuncture.
- By the present invention, the smooth exterior contour between the needle and the first cannula facilitate venipuncture and yet when the needle is removed an adequate flow path may exist between the first and seeond cannulae.
- Two arrangements are envisaged permitting the displacement of the needle. In one of these, the second cannula is withdrawn to a position rearward of the fi.rst cannula in the puncturing condition of the assembly and is displaceable forwardly in the fluid transfer condition subsequent to withdrawal of the needle. In the other, the second cannula is mounted to extend through and forwardly of the first cannula during both the fluid transfer and the puncturing conditions of the assembly and the needle is telescopically slidable on the second cannula to extend between, and forwardly of, the first and second cannulae in the puncturing condition.
- Various embodiments of cannula assemblies in accordance with the present invention will now be described by way of example only with reference to the accompanying drawings, in which:-
- FIGURE 1 is a perspective view of a first embodiment of the invention;
- FIGURE 2 is a cross-section taken along lines 2-2 of FIGURE 1;
- FIGURE 3 is a cross-sectional elevation of the embodiment of FIGURE 1 illustrating the stylet needle in a partially removed position and illustrating the interior cannula as partially advanced through the cannula hub or body;
- FIGURE 4 is a cross-sectional elevation of the embodiment of FIGURE 1 illustrating the separate flow paths connected to appropriate extracorporeal blood circuitry;
- FIGURE 5 is an enlarged cross-sectional elevation of a second embodiment similar to the embodiment of FIGURE 1 and illustrating a unidirectional flow control valve therein;
- FIGURE 6 is a perspective illustration of a third embodiment having a reciprocating needle, the needle being illustrated in the forwardmost, initial position;
- FIGURE 7 is a perspective illustration of the embodiment of FIGURE 6 with the needle in the retracted position; and
- FIGURE 8 is a cross-section taken along lines 8-8 of FIGURE 7.
- Attention is now directed to the FIGURES wherein like parts are designated with like numerals throughout.
- With particular reference to FIGURE 1, the cannula assembly generally designated 10 comprises a cannula body or
hub 12 preferably formed of a rigid plastics material. An exteriorhollow cannula 14 is mounted within thehub 12 at the leadingend 16 thereof as shown best in FIGURE 2. Theexterior cannula 14 projects forward of the hub 12 a discrete, predetermined distance and is tapered forwardly at the leadingtip 18. If desired,apertures 20 may be formed in theexterior cannula 14 adjacent the leadingtip 18 thereof. Thehub 12 has atrailing end 22 which, in the illustrated embodiment, is secured to aflexible sleeve 24. Theflexible sleeve 24 is provided with anend plug 26 preferably formed of neoprene or other suitable material which is self-sealing. - The
hub 12 has aninternal throughbore 28 which opens at thetrailing end 22 of the hub and is in direct internal communication with the interior ofcannula 14. Thehub 12 is bifurcated at 30 so as to form abranch Branch 32 has abore 34 which communicates directly with thebore 28 of thehub 12. Thebranch 32 is rearward, angularly related with respect to thehub 12 preferably at about 45 degrees or less, the bifurcation and angle facilitating displacement of aninterior cannula 38 as hereinafter described. Thebranch 32 is provided with a sealing means such as neoprene self-sealing plug 36 through which theinterior cannula 38 displaceably passes. - Referring again to FIGURE 2, an
elongated stylet needle 40 is telescopically disposed through the entire length of thehub 12 andexterior cannula 14 and has an exterior diameter similar to the interior diameter of thecannula 14 thereby providing a smooth interchange surface. The sharpenedtip 42 of theneedle 40 projects beyond theexterior cannula 14 so as to permit facile venipuncture and safe introduction of theexterior cannula 14 into a blood vessel according to conventional techniques. The trailing end 44 of theneedle 40 is rigidly mounted within aneedle hub 46. Preferably, theneedle hub 46 defines ahollow interior 48 which communicates directly with the interior of thehollow needle 40. Thus, upon successful venipuncture, theneedle hub 46 will reflect a blood flashback indicating successful venipuncture. The needle is intended to pass immediately through theplug 26 in the position illustrated in FIGURE 2. However, because thesleeve 24 is flexible in configuration, and in order to give stability to the cannula assembly 10 during venipuncture, acylindrical housing 50 is mounted upon theneedle hub 46 and telescopically circumscribes thesleeve 24 and the trailingend 22 of thehub 12. As shown best in FIGURE 1, thehousing 50 has a plurality ofkeyways 52 adapted to receive asuitable detent 54. The detent 54 in co-operation with thekeyway 52 locks thehousing 50 temporarily in place upon thehub 12. - After venipuncture, the
housing 50 may be rotated slightly about che axis of theneedle 40 and retracted rearwardly as snown in FIGURE 3 until the needle has been removed from theexterior cannula 14. While the needle is in the advanced position illustrated in FIGURE 2, thethroughbore 28 is substantially obstructed. However, when theneedle 40 is retracted to the position illustrated in FIGURE 3, at least that portion of thethroughbore 28 which is forward of the intersection ofbore 34 withbore 28 is unobstructed. When unobstructed, theinterior cannula 38 may be advanced from its withdrawn position shown in FIGURE 2 through the hollow of theexterior cannula 14 by digital manipulation. Thecannula 38 defines ahollow passageway 56 which communicates openly with thefemale coupling 58. The length ofcannula 38 is selected to project beyond the leadingend 18 ofcannula 14 when thecannula 38 is fully advanced through thebore 34. When desired, blood may be communicated through thepassageway 56 of theinterior cannula 38 by connecting a blood tubing to thefemale coupling 58. Because thecannula 38 will come in contact with the patient's blood, it may be desirable to maintain the sterility of thecannula 38. Accordingly, a suitableflexible packaging material 60 as schematically illustrated in broken lines in FIGURE 1, could be used.Conventional packaging material 60 which permits advancement of a catheter through a hub is known in the art and no further comment thereon is deemed necessary. - The method of using the cannula assembly embodiment of FIGURES 1 to 4 can best be understood by reference to FIGURES 3 and 4. With the needle in the fully advanced position illustrated in FIGURE 2, venipuncture is performed such that the
exterior cannula 14 is inserted within a blood vessel to create a single fistula. Thereafter, thehousing 50 is rotated slightly and the needle withdrawn to the position illustrated in FIGURE 3. Of course, if desired, theneedle 40 may be completely withdrawn through theplug 26, the memory of theplug 26 preventing the blood from spilling out of thehub 12. However, it may also be desirable to leave the needle in the position illustrated in FIGURE 3. In any event, after the needle has been withdrawn from theexterior cannula 14, theinterior cannula 38 may be advanced through thebranch 32 until it projects a desired distance beyond the leadingend 18 of thecannula 14. Thus,cannulae cannula 14 in the forward position ofcannula 38. Notably, the external diameter of thecannula 38 is sufficiently less than the internal diameter of thecannula 14 that blood will flow easily therebetween. Accordingly, blood may be aspirated in the passageway between thecannula 14 and thecannula 38, through thebore 28, the hollow of theneedle 40, theneedle hub 46 and through extracorporeal blood circuitry (not shown) connected at 62. After the blood has traversed an extracorporeal blood circuit, it may then be returned through thecoupling 58 and thepassageway 56 within theinterior cannula 38. - Note that blood may be withdrawn from and returned to the patient without creating an additional fistula and without otherwise modifying the structure of the cannula assembly 10. The withdrawal and return of blood may occur simultaneously or serially, as desired.
- While the needle may be retained in the position illustrated in FIGURE 3, it has been found preferable to completely remove the
needle 40 from thehub 12. Removal is easip accommodated by withdrawing the needle from theplug 28 manually squeezing theflexible sleeve 24 to prevent cutflow of blood, removingplug 26 and thereafter inserting thecoupling 62 of the extracorporeal blood circuit directly into thesleeve 24. In this configuration, the risk that the needle may damage theinterior cannula 38 or otherwise interfere with the flow of blood is eliminated. As pointed out in FIGURE 4, in this presently preferred embodiment, the interior can-- nula 38 may be of any desirable length and will preferably project a substantial distance beyond the leadingend 18 of theexterior cannula 14. Because the length ofcannula 38 can be selected, any of a variety of distances between the leadingtip 18 ofcannula 14 and the leading tip ofcannula 38 could be selected (see FIGURE 4). - Referring now to FIGURE 5, a modification of the embodiment of FIGURES 1-4 is illustrated. In FIGURE 5, a female Luer fitting 66 has been substituted for the
rubber plug 36 as shown in FIGURE 2. The female Luer fitting receives a male coupling 68 in press-fit relation to permit return of blood from the extracorporeal blood circuit through thepassageway 56 of theinterior cannula 38. - In order to prevent blood within the
throughbore 28 from escaping through the Luer fitting 66 as thecannula 38 is advanced, aunidirectional check valve 70 is provided in thebranch 32. Thecheck valve 70 is preferably made of a flexible rubber material through which thecannula 38 is easily passed in the forward direction. Thevalve 70 is a leaflet or duck-bill type valve. - Attention is now directed to another preferred cannula assembly embodiment generally designated 80 and illustrated in FIGURES 6-8. The
cannula assembly 80 is intended to accomplish the same purpose as the assembly 10. More particularly, theassembly 80 comprises anexterier cannula 82 whicn is mounted at theforward end 84 of acannula hub 86. Preferably, theexterior cannula 82 is forwardly tapered at 88 and defines an interior bore 90 (see FIGURE 8). Thebore 90 of thecannula 82 communicates directly with a recess 91 in thehub 86. The recess 91 opens at the trailingend 94 of thehub 86. Rubber sleeve 87 is nested within recess 91 and defines athroughbore 92 which tightly circumscribesneedle 126 to form an air-tight seal as will hereinafter be more fully described. - An interior catheter or
cannula 98 traverses theentire throughbore 92 and thebore 90 ofexterior cannula 82 in fixed manner. Theleading end 100 of thecannula 98 projects substantially beyond the leadingend 88 ofcannula 82 as shown in both FIGURES 7 and 8 and a fluid flow path is provided between the two cannulae. The trailing end ofcannula 98 is mounted withincoupling member 102, thecoupling member 102 having a male Luer fitting 104 which is in direct alignment with thethroughbore 92. Theinterior cannula 98 is hollow and opens directly into the female Luer coupling 106. Thecoupling member 102 is maintained in direct alignment and fixed spacial relationship with thehub 86 by astrut 108. It can be seen, therefore, that there is a discrete passageway from the leadingtip 100 of thecannula 98 through the entire length of thecannula 98 to thecoupling member 102. - The cannula nub 86 is bifurcated at 110 to form a rearwardly
angled branch 112. Thebranch 112 has a female Luer fitting 114 at its trailingend 116 into which asuitable coupling 120 from a conventional extracorporeal blood circuit is press-fit. Thebranch 112 has ahollow interior 122 which communicated directly with thebore 90 ofexterior cannula 82. Accordingly, a discrete passageway exists through thebore 90 and hollow 122 to thecoupling 120. In addition as previously described, a separate and discrete passageway exists through the hollow ofinterior cannula 98 to the trailing end ofcoupling member 102 and to amale coupling 124 press-fit therein. - In order to facilitate introduction of the
co-extensive cannulae venipuncture needle 126 is provided. Thevenipuncture needle 126 has a sharpbeveled end 128 which, in the initial position illustrated in FIGURE 5, projects through the interior ofcannula 82 and telescopically around and beyondcannula 98. With reference to FIGURE 8, it can be appreciated that theneedle 126 is reciprocably displaceable within thebore 92 of the sleeve 87. The sleeve 87 forms an air-tight seal withneedle 126 so that negative pressure within thehub 86 andbranch 112 will not draw air around theneedle 126 into the blood within the hub. The trailingend 129 of theneedle 126 is firmly mounted to ashuttle 130, the shuttle having a rearwardly facingfemale fitting 132 which is selectively press-fit upon themale fitting 104 ofcoupling member 102 as illustrated in FIGURE 8. Clearly, the location of themale fitting 104 andfemale fitting 132 could be reversed without adverse consequence. This press-fit coupling minimises blood leakage around theneedle 126 after venipuncture and forms an air seal for preventing air from entering thehub 86 when the interior ofhub 86 is subjected to negative internal pressure. - The method of using the embodiment of FIGURES 6-8 is apparent from the drawing. Initially, the
shuttle 130 is advanced forwardly until theneedlw 126 projects beyond the leadingend 88 of thecannula 82 and substantially circumscribes and confines theinterior cannula 98. By restraining theshuttle 130 in place with the fingers, the venipuncture can easily be made. It is observed, however, thattheneedle 126 will substantially fill the passageway in thethroughbore 90 between thecannula 82 and thecannula 98 thereby providing a smooth surface between itself and thecannula 82. Accordingly, blood will not flow through thebore 90 and hollow 122 in thebranch 112 while the needle is in the forward position illustrated in FIGURE 6. - After venipuncture has been successfully accomplished and the fistula established, the
shuttle 130 may be manually displaced rearwardly and telescopically over the exposed portion of theinterior cannula 98 until theshuttle 130 mates with thecoupling member 102. In this mode, blood will freely flow between thecannulae branch 112 and the extracorporeal blood circuit connected at 120. At the same time, blood may also flow through the hollow of theinterior cannula 98 and through thecoupling 124 to the extracorporeal blood circuit. - The length of the
needle 126 and thestrut 108 are selected so that when theshuttle 130 is in the rearmost position illustrated in FIGURES 7 and 8, the sharpenedleading end 128 of theneedle 126 will remain supported by thecannula hub 86 but be fully retracted out of thepathway 122 so as to avoid interfering with blood flow. - Clearly, in the embodiments illustrated herein a structure has been described which facilitates successful cannulation of a blood vessel and, after cannulation, the displacement and/or removal of the sharpened needle to permit essentially simultaneous aspiration of blood from the patient and delivery of blood back to the patient through two discrete flow paths in the assembly.
- The invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive and the scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
- `l. A cannula assembly comprising first and second cannulae that define separate flow paths, the second cannula extending, in a fluid transfer condition, concentrically through and forwardly of the first cannula, the assembly being characterised in that a needle is telescopically mounted therein to be displaceable between a position in a puncturing condition of the assembly in which the needle extends through the first cannula forwardly of both the first and second cannulae and a position in the fluid transfer condition of the assembly in which it is withdrawn rearwardly of the forward end of the first cannula, and further characterised in that the needle and first cannula define a smooth exterior surface for venipuncture.
- 2. A cannula assembly according to claim 1 characterised in that the second cannula is withdrawn to a position rearward of the first cannula in the puncturing condition of the assembly and is displaceable forwardly in the fluid transfer condition subsequent to withdrawal of the needle.
- 3. A cannula assembly according to claim 2 characterised in that the first and second cannulae and the needle are supported in a hollow body that is bifurcated and that is in communication with the first cannula and in that the second cannula is displaceable through one of the branches of the body which includes sealing means to control escape of fluid from said branch as the second cannula is displaced.
- 4. A cannula assembly according to claim 3 characterised in that the sealing means comprises a unidirectional check valve located within the hollow body and through which the second cannula is displaceable.
- 5. A cannula assembly according to either of claims 3 and 4 characterised in that the needle is withdrawable into or from the other branch of the body from the puncturing condition of the assembly.
- 6. A cannula assembly according to claim 5 characterised in that the other branch includes a flexible sleeve which may be pinched closed when the needle is withdrawn therefrom to prevent escape of fluid through said branch.
- 7. A cannula assembly according to claim 6 characterised in that the needle is further supported by means of an elongate housing which in the puncturing condition of the assembly extends over the flexible sleeve and releasably engages with the body.
- 8. A cannula assembly according to claim 1 characterised in that the second cannula is mounted to extend through and forwardly of the first cannula during both the fluid transfer and the puncturing conditions of the assembly and the needle is telescopically slidable on the second cannula to extend between, and forwardly of, the first and second cannulae in the puncturing condition.
- 9. A cannula assembly according to claim 8 characterised in that the first and second cannulae and the needle are supported in a hollow body that communicates with the first cannula, and in that the withdrawn position of the needle is determined by a stop secured to the body at a spaced location rearwardly thereof, the rearward end of the needle and the stop having complementary coupling portions which engage in the fluid transfer condition to prevent escape of the fluid from the hollow of the needle, and further in that the coupling portion of the stop is in communication with the second cannula which extends through the body.
- 10. A cannula assembly according to claim 7 characterised in that an air-seal is provided between the needle and the body.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82184877A | 1977-08-04 | 1977-08-04 | |
US821848 | 1977-08-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0000831A1 true EP0000831A1 (en) | 1979-02-21 |
EP0000831B1 EP0000831B1 (en) | 1983-03-16 |
Family
ID=25234450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP78300235A Expired EP0000831B1 (en) | 1977-08-04 | 1978-08-03 | A cannula assembly |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0000831B1 (en) |
JP (1) | JPS5428499A (en) |
CA (1) | CA1114705A (en) |
DE (1) | DE2862201D1 (en) |
IT (1) | IT1097699B (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0036642A2 (en) * | 1980-03-21 | 1981-09-30 | Uthmann, Ulrich, Dr.-med. | Catheter |
DE3122675A1 (en) * | 1980-06-10 | 1982-04-08 | H.G. Wallace Ltd., Colchester, Essex | Improvements in intravascular devices |
DE3112762A1 (en) * | 1981-03-31 | 1983-01-13 | Jürgen Dr.med. 8700 Würzburg Schrezenmeir | Double-lumen blood sampling, single-lumen infusion, subclavian catheter set |
GB2137500A (en) * | 1983-03-22 | 1984-10-10 | Miles Allison | Cannula |
US4493708A (en) * | 1981-12-10 | 1985-01-15 | Terumo Corporation | Intravascular catheter assembly |
FR2689402A1 (en) * | 1992-04-03 | 1993-10-08 | Farcot Jean Christian | Instrument for insertion of catheter etc. in blood vessel - has elongate insertion conduit receiving catheter at proximal end, with perforations formed in distal end to allow continued blood flow. |
US5421825A (en) * | 1993-10-06 | 1995-06-06 | Farcot; Jean-Christian | Percutaneous vascular introduction device for the feeding of an extracorporeal blood circuit |
EP0725658A1 (en) * | 1994-08-25 | 1996-08-14 | Baxter International Inc. | Closed system blood sampling device |
WO1999002209A1 (en) * | 1997-07-08 | 1999-01-21 | Süddeutsche Feinmechanik GmbH | Two lumen cannula |
US20210178142A1 (en) * | 2019-12-13 | 2021-06-17 | Lsi Solutions, Inc. | Adjustable cannulation assembly and methods thereof |
US11311714B2 (en) | 2017-02-02 | 2022-04-26 | Xenios Ag | Arrangement with a blood pump, a control unit and a device for transmitting the measured values |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5645106A (en) * | 1979-09-18 | 1981-04-24 | Yanmar Agricult Equip | Automatic steering device of transplanter |
JPS61106256U (en) * | 1984-12-16 | 1986-07-05 | ||
WO2006022025A1 (en) * | 2004-08-26 | 2006-03-02 | Kobayashi, Hideki | Medical instrument |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3875938A (en) * | 1973-08-22 | 1975-04-08 | Eli K Mellor | Multi-mode cannulating apparatus |
US4016879A (en) * | 1973-08-22 | 1977-04-12 | Dynasciences Corporation | Multi-mode cannulating apparatus |
DE2645520A1 (en) * | 1975-10-08 | 1977-04-14 | William F Mclaughlin | DEVICE FOR POINTING BODY BARRELS |
BE851299A (en) * | 1976-02-11 | 1977-05-31 | Hospal S A | CATHETER |
LU77252A1 (en) * | 1976-05-06 | 1977-08-22 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5236358B2 (en) * | 1973-08-09 | 1977-09-14 |
-
1978
- 1978-07-17 CA CA307,492A patent/CA1114705A/en not_active Expired
- 1978-07-28 JP JP9167478A patent/JPS5428499A/en active Pending
- 1978-08-03 EP EP78300235A patent/EP0000831B1/en not_active Expired
- 1978-08-03 DE DE7878300235T patent/DE2862201D1/en not_active Expired
- 1978-08-04 IT IT26467/78A patent/IT1097699B/en active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3875938A (en) * | 1973-08-22 | 1975-04-08 | Eli K Mellor | Multi-mode cannulating apparatus |
US4016879A (en) * | 1973-08-22 | 1977-04-12 | Dynasciences Corporation | Multi-mode cannulating apparatus |
DE2645520A1 (en) * | 1975-10-08 | 1977-04-14 | William F Mclaughlin | DEVICE FOR POINTING BODY BARRELS |
BE851299A (en) * | 1976-02-11 | 1977-05-31 | Hospal S A | CATHETER |
LU77252A1 (en) * | 1976-05-06 | 1977-08-22 |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0036642A2 (en) * | 1980-03-21 | 1981-09-30 | Uthmann, Ulrich, Dr.-med. | Catheter |
EP0036642A3 (en) * | 1980-03-21 | 1982-08-18 | Uthmann, Ulrich, Dr.-med. | Catheter |
DE3122675A1 (en) * | 1980-06-10 | 1982-04-08 | H.G. Wallace Ltd., Colchester, Essex | Improvements in intravascular devices |
DE3112762A1 (en) * | 1981-03-31 | 1983-01-13 | Jürgen Dr.med. 8700 Würzburg Schrezenmeir | Double-lumen blood sampling, single-lumen infusion, subclavian catheter set |
US4493708A (en) * | 1981-12-10 | 1985-01-15 | Terumo Corporation | Intravascular catheter assembly |
GB2137500A (en) * | 1983-03-22 | 1984-10-10 | Miles Allison | Cannula |
FR2689402A1 (en) * | 1992-04-03 | 1993-10-08 | Farcot Jean Christian | Instrument for insertion of catheter etc. in blood vessel - has elongate insertion conduit receiving catheter at proximal end, with perforations formed in distal end to allow continued blood flow. |
US5421825A (en) * | 1993-10-06 | 1995-06-06 | Farcot; Jean-Christian | Percutaneous vascular introduction device for the feeding of an extracorporeal blood circuit |
EP0725658A1 (en) * | 1994-08-25 | 1996-08-14 | Baxter International Inc. | Closed system blood sampling device |
EP0725658A4 (en) * | 1994-08-25 | 1997-10-08 | Baxter Int | Closed system blood sampling device |
US5947932A (en) * | 1994-08-25 | 1999-09-07 | Baxter International Inc. | Closed system blood sampling device |
WO1999002209A1 (en) * | 1997-07-08 | 1999-01-21 | Süddeutsche Feinmechanik GmbH | Two lumen cannula |
US11311714B2 (en) | 2017-02-02 | 2022-04-26 | Xenios Ag | Arrangement with a blood pump, a control unit and a device for transmitting the measured values |
US20210178142A1 (en) * | 2019-12-13 | 2021-06-17 | Lsi Solutions, Inc. | Adjustable cannulation assembly and methods thereof |
Also Published As
Publication number | Publication date |
---|---|
EP0000831B1 (en) | 1983-03-16 |
IT1097699B (en) | 1985-08-31 |
JPS5428499A (en) | 1979-03-03 |
DE2862201D1 (en) | 1983-04-21 |
IT7826467A0 (en) | 1978-08-04 |
CA1114705A (en) | 1981-12-22 |
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