EP0957948A1 - Ensemble aiguille-canule evitant les projections de sang - Google Patents
Ensemble aiguille-canule evitant les projections de sangInfo
- Publication number
- EP0957948A1 EP0957948A1 EP96908530A EP96908530A EP0957948A1 EP 0957948 A1 EP0957948 A1 EP 0957948A1 EP 96908530 A EP96908530 A EP 96908530A EP 96908530 A EP96908530 A EP 96908530A EP 0957948 A1 EP0957948 A1 EP 0957948A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cap
- injection port
- assembly according
- body member
- cannula
- 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- Withdrawn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
-
- 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
- A61M25/0097—Catheters; Hollow probes characterised by the hub
-
- 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
- A61M25/06—Body-piercing guide needles or the like
- A61M25/0693—Flashback chambers
Definitions
- the present invention relates to cannula-needle assemblies, and particularly to such an assembly for preventing or reducing blood backflash.
- Cannula-needle assemblies are widely used for administering a liquid to a subject and/or for receiving blood samples from a subject.
- Such assemblies typically include a cannula insertable into a vein through an opening in the subject's skin, and a needle movable through the cannula for piercing the subject's skin to produce the opening for the cannula. The needle is then removed to enable an external device, e.g., an IV (intravenous) infusion bag, to be coupled to the cannula for administering liquid to the subject, and/or for receiving blood from the subject.
- IV intravenous
- Such assemblies are commonly used where intravenous infusion is to be administered to the subject, and or where a plurality of blood samples are to be taken from the subject.
- An object of the present invention is to provide a cannula-needle assembly for reducing or preventing blood backflash having advantages in the above respects.
- a cannula-needle assembly comprising: a body member formed with a longitudinal passageway therethrough having a proximal end for coupling to an external device for administering a liquid to a subject, or for receiving blood from the subject, via the distal end of the longitudinal passageway: a cannula having a proximal end fixed to the body member at, and in communication with, the distal end of the passageway, the cannula having a distal end insertable through an opening in the subject's skin; a needle insertable via the proximal end of the longitudinal passageway to pass through the passageway and through the cannula, to project through the distal end of the cannula for producing the opening in the subject's skin to receive the distal end of the cannula, and then to be removed via the proximal end of the passageway before the external device is coupled thereto; an injection port formed in the body member and including a transverse passageway joined at a junc
- such an assembly can be constructed of a few, relatively simple parts, and can be used in a very convenient manner to administer a liquid to a subject, and/or to receive a blood sample from the subject with a minimal of blood backflash.
- Fig. 1 is a top plan view illustrating an existing form of injection-site device particularly useful in the cannula-needle assembly in accordance with the present invention:
- Fig. 2 is an enlarged three-dimensional view of the assembly of Fig. 1 but incorporating a cap constructed in accordance with the present invention, with the cap shown in its inner closed position, parts being broken away to show internal structure;
- Fig. 3 is a transverse sectional view of the assembly of Fig. 2;
- Figs. 4 and 5 are longitudinal sectional views of a variation in the assembly of Figs. 2 and 3 with the cover removed, illustrating the outer-open position and the inner-closed position of the cap, respectively;
- Figs. 6 and 7 are top plan views of the assembly of Figs. 4 and 5 showing the cap in its released position and locked position, respectively;
- Figs. 8 and 9 are side and bottom views, respectively, of the cap of Figs. 4-7;
- Fig. 10 is a longitudinal sectional view illustrating a variation in the cannula-needle assembly of the present invention.
- Fig. 11 is a top plan view of the assembly of Fig. 10; and Figs. 12 and 13 are longitudinal sectional views illustrating two further variations in the cannula- needle assemblies constructed in accordance with the present invention.
- the cannula-needle assembly illustrated in the drawings is shown, for purposes of example, as embodied in a conventional injection-site device, shown in Fig. 1, to be attached to a subject and to be used for ad ⁇ iinistering a medication to the subject continuously or at different times, or for extracting from the subject a plurality of blood samples.
- the assembly is initially applied to the subject by piercing the subject's vein by means of the needle of the injection-site device, and then attaching the assembly to the subject. Once the assembly is so applied, it may be used thereafter for administering medication or for removing blood samples without the need to pierce the subject's vein each time.
- the injection-site device illustrated in Fig. 1 comprises a body member, generally designated 2, formed with a longitudinal passageway 3 extending through the both' member.
- Passageway 3 includes a proximal end 3a (Figs. 4, 5) for coupling to an external device (not shown), such as an IN bag for administering a liquid to the subject or a syringe for receiving blood from the subject via the distal end 3b of passageway 3.
- a cannula 4 is fixed at its proximal end 4a to the body member 2 at and in communication with, the distal end 3b of passageway 3 through the body member.
- Cannula 4 has a distal end 4b which is insertable through an opening in the subject's vein formed by a needle 5.
- the needle 5 is insertable through passageway 3, through cannula 4, and through the distal end 4b of the cannula in order to pierce the subject's vein for inserting cannula end 4b therethrough.
- the needle is then removed from passageway 3, and the external device is immediately attached to the body member via Luer locking elements 2a (Fig. 2) for administering medication to the subject (e.g.. via an IV bag), or for extracting blood samples from the subject.
- the body member may then be secured to the subject's body by applying pressure-sensitive tape across the opposed tabs 2b or sutures through the openings formed in the tube.
- body member 2 further includes an injection port 6 formed with a transverse passageway 7 joined at a juncture 7a with the longitudinal passageway 3.
- Injection port 6 is used for administering a substance, such as another medication, to the subject afrer the cannula 4 has been inserted into the subject's vein.
- a deformable sleeve 8 made of an elastomeric material such as silicone rubber, is received within the longitudinal passageway 3.
- Sleeve 8 ⁇ nes passageway 3 and also seals the juncture 7a between that passageway and the transverse passageway 7.
- sleeve 8 Upon the injection of a substance (e.g., a medication) via injection port 6, sleeve 8 deforms under the injection pressure, and permits the injected substance to pass between the outer surface of the sleeve and the inner surface of the body member along the distal end 3b of passageway 3 to and through cannula 4 into the subject's vein.
- a substance e.g., a medication
- the illustrated injection-site device further includes a cover 9 removably attachable over the open end of injection port 6 to close the injection port except when a substance is to be injected through that port.
- Cover 9 is attached to injection port 6 by means of a mounting ring 10 received around the injection port, and a pair of arms 11 integrally formed with the cover and the ring. Arms 11 thus serve as an integral hinge permitting the cover to be moved to either an open position (shown in Fig. 2), or to a closed position covering the injection port (shown in Fig. 1).
- a strip 12 integrally formed between the two arms 11, and joining the cover 9 of the mounting ring 10, serves as an over-center spring urging the cover to its open or closed positions.
- the injection-site device insofar as described above, is well known and in wide use. As pointed out however, when the needle 5 is withdrawn from the body member 2 to permit attachment of the external device (via Luer locking elements 2a) to administer a medication or to receive a blood sample, a flow of blood (backflash) results before the external device can be attached.
- the illustrated assembly includes a cap. generally designated 20, receivable over the injection port 6.
- Cap 20 is formed with a stem 21 which is received in the transverse passageway 7 of the injection port and is engageable with the elastomeric sleeve 8 in the longitudinal passageway 3 to deform the sleeve and to pinch it closed, and thereby to prevent such blood backflash when the needle 5 is withdrawn.
- cap 20 is normally in an outer position wherein its stem 21 lightly engages, or is slightly spaced from, the elastomeric sleeve 8, thereby permitting the sleeve to assume its normal tubular shape providing a flowpath to or from the cannula 4.
- Cap 20, however, may be manually depressed to its inner position (shown in Figs. 2, 3 and 5) wherein its stem 21 pinches- closed sleeve 8, to thereby block communication therethrough to or from the cannula.
- Figs. 2 and 3 illustrate stem 21 as formed with a plurality of axially-extending, circumferentially-spaced ribs 22 for guiding the movements of the cap.
- Stem 21 is further integrally formed with a flexible annular skirt 23 engageable with the juncture 7a between passageways 7 and 3 in the lower position of the stem (as shown in Figs. 3 and 5) to thereby seal the injection port 6 from passageway 3 when the cap is in its inner position.
- cap 20 When the cap has been manually depressed to its inner position, it may be retained in this position, thereby freeing the attendant from having to maintain pressure on the cap.
- cap 20 is formed with a hook- shaped retainer element 24. After the cap has been depressed to its inner position and slightly rotated, element 24 is brought to underlie one of the arms 11 of cover 9 (as seen in Fig. 7), to thereby retain the cap in its inner position.
- Cap 20 is further formed with a retainer rod 25 (Fig. 2) to extend outwardly of ring 10 mounting the cover 9 to the injection port 6.
- Retainer rod 25 terminates in a hook 26 engageable with the underside of mounting ring 10 in order to releasably retain the cap in its outer position, and thereby to prevent separation of the cap from the injection port.
- Retainer rod 25, however, is sufficiently flexible so that the user may apply a lateral force to separate hook 26 from the mounting ting 10 when it is intentionally desired to remove the cap from the injection port.
- needle 5 is passed through passageway 3 in body member 2, and through the cannula 4, to cause the needle and cannula to pierce the subject's vein.
- the needle is then withdrawn, and cap 20 is pressed inwardly (downwardly) to cause its stem 21 to pinch- close the elastomeric sleeve 8, and thereby to prevent blood blackflash.
- the cap is retained in its inner position by slightly rotating it to bring its hook-shaped element 24 to underlie one of the arms 11 of the cover 9.
- the assembly may then be attached to the subject's body by applying pressure- sensitive tapes to the opposed tabs 2b or sutures through the openings in the tabs.
- the sealing skirt 23 integrally formed with the stem 21 engages the inner surface of juncture 7a, thereby preventing blood flow through the injection port 6, while the pinched-closed condition of sleeve 8 prevents blood flow through the sleeve.
- the appropriate external device e.g., IV bag or syringe, respectively
- the appropriate external device may be attached to the proximal end of the body member 2 by means of the Luer male locking elements 2a.
- cap 20 is rotated slightly to cause its retainer element 24 to release from the underside of the cover arm 11 (as seen in Fig. 6). This permits the cap to move towards its outer position, and the sleeve 8 to return to its normal tubular configuration, opening the flowpath through the sleeve to or from the cannula 4.
- cap 20 may be manually removed from injection port 6, and cover 9 may then be pivoted to close the injection port.
- sleeve 8 deforms sufficiently to permit the injected substance to pass between its outer surface and the inner surface of body member 12 to cannula 4.
- Figs. 4-9 illustrate a variation in the construction of the cap 20.
- the movements of the cap and its stem to their inner and outer positions are guided by a pair of external spacer elements 22' engageable with the outer surface of the injection port 6. rather than by inner guiding ribs 22 engageable with the inner surface of bore 7.
- Figs. 10 and 11 illustrate an assembly similar to that described above, but with several changes.
- the cap generally designated 40, also includes a stem 41 for pinch-closing the elastomeric sleeve 8 in the inner position of the cap and stem.
- the movements of the cap and stem are guided by an annular skirt 42 engageable with the outer surface of the injection port 6.
- the distal end of the body member 2 is formed with a plurality of axially-extending, circumferentially-spaced ribs 43 engageable with the distal end of sleeve 8 to assure a flowpath for any substance injected via injection port 6.
- a retainer ring 44 is inserted into passageway 3 of body member 2, engageable with the opposite (proximal) end of sleeve 8 to prevent axial movement of the sleeve when it is pinch-closed by stem 41 of cap 40.
- a further modification illustrated in Figs. 10 and 11 is that the cap 40 is joined to one of the tabs 2b of the body member 2 by a strip 2c integrally formed with the cap and tab to prevent accidental loss of the cap when not received in the injection port 6.
- Fig. 12 illustrates a further modification, wherein the cap 50, when in its inner position, seals passageway 7 from passageway 3 by means of an annular rib 52 integrally formed with its stem 51 and engageable with the inner surface of the juncture 7a between these two passageways in the body member.
- Fig. 13 illustrates a further modification, wherein the stem 61 of the cap 60 is formed with a sealing ring 62, corresponding to sealing ring 52 in Fig. 12.
- Stem 61 is also formed with a wedging surface 63 engageable with a corresponding wedging surface at the juncture 7a between the two passageways 7 and 3, to enhance the seal and to releasably retain the cap and its stem in their inner pinch-closing positions with respect to the elastomeric sleeve 8.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL112814A IL112814A (en) | 1995-02-27 | 1995-02-27 | Cannula-needle assembly preventing blood backflash |
IL11281495 | 1995-02-27 | ||
PCT/US1996/002596 WO1996026753A1 (fr) | 1995-02-27 | 1996-02-26 | Ensemble aiguille-canule evitant les projections de sang |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0957948A1 true EP0957948A1 (fr) | 1999-11-24 |
EP0957948A4 EP0957948A4 (fr) | 1999-11-24 |
Family
ID=11067139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96908530A Withdrawn EP0957948A1 (fr) | 1995-02-27 | 1996-02-26 | Ensemble aiguille-canule evitant les projections de sang |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0957948A1 (fr) |
AU (1) | AU5174496A (fr) |
IL (1) | IL112814A (fr) |
WO (1) | WO1996026753A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0317736D0 (en) * | 2003-07-29 | 2003-09-03 | Homerton University Hospital N | Intravenous cannula system |
TR201808564T4 (tr) * | 2014-03-10 | 2018-07-23 | Delta Med S P A Unipersonale | Geri akışı engelleyen kateter. |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4960259A (en) * | 1987-09-17 | 1990-10-02 | Joka Kathetertechnik Gmbh | Shut-off valve for a liquid flow line or infusion device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4703775A (en) * | 1985-09-16 | 1987-11-03 | Abbott Laboratories | Liquid flow regulator |
US5496287A (en) * | 1994-07-05 | 1996-03-05 | Jinotti; Walter J. | Pulmonary suction catheter |
-
1995
- 1995-02-27 IL IL112814A patent/IL112814A/en not_active IP Right Cessation
-
1996
- 1996-02-26 EP EP96908530A patent/EP0957948A1/fr not_active Withdrawn
- 1996-02-26 AU AU51744/96A patent/AU5174496A/en not_active Abandoned
- 1996-02-26 WO PCT/US1996/002596 patent/WO1996026753A1/fr not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4960259A (en) * | 1987-09-17 | 1990-10-02 | Joka Kathetertechnik Gmbh | Shut-off valve for a liquid flow line or infusion device |
Non-Patent Citations (1)
Title |
---|
See also references of WO9626753A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0957948A4 (fr) | 1999-11-24 |
WO1996026753A1 (fr) | 1996-09-06 |
IL112814A (en) | 1998-02-22 |
AU5174496A (en) | 1996-09-18 |
IL112814A0 (en) | 1995-05-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0840627B1 (fr) | Site d'injection sans aiguille | |
US5098410A (en) | Adapter cap attachment | |
US6261268B1 (en) | Needleless injection site | |
EP1473052B1 (fr) | Dispositif médical à support détachable | |
KR100598884B1 (ko) | 안전 주사기 | |
EP1131129B1 (fr) | Hemojoint avec cloison sous charge de ressort | |
US5514117A (en) | Connector having a medical cannula | |
US5453097A (en) | Control of fluid flow | |
US4994041A (en) | Needle and catheter assembly | |
US6699221B2 (en) | Bloodless catheter | |
EP0783899B1 (fr) | Appareil de prise d'échantillons de sang | |
EP0343953B1 (fr) | Ensemble de canule intravasculaire auto-occlusive | |
US6152900A (en) | Needleless injection site | |
WO1995035125A9 (fr) | Site d'injection sans aiguille | |
JPH0532071B2 (fr) | ||
JP2002191583A (ja) | 注射部位及びカニューレ装置 | |
EP3077033A1 (fr) | Ensembles aiguilles de sécurité et procédés associés | |
EP0957948A1 (fr) | Ensemble aiguille-canule evitant les projections de sang | |
AU2013392518B2 (en) | Multifunctional indwelling needle | |
WO1997038744A1 (fr) | Point d'injection sans aiguille |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19970902 |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 19990616 |
|
AK | Designated contracting states |
Kind code of ref document: A4 Designated state(s): DE FR GB IT NL Kind code of ref document: A1 Designated state(s): DE FR GB IT NL |
|
17Q | First examination report despatched |
Effective date: 20020114 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20020525 |