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
  • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
  • A61M39/22—Valves or arrangement of valves
  • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
• • 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
  • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
  • A61M39/02—Access sites
  • A61M39/04—Access sites having pierceable self-sealing members
• • 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
  • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
  • A61M2039/0036—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use characterised by a septum having particular features, e.g. having venting channels or being made from antimicrobial or self-lubricating elastomer
• • 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
  • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
  • A61M2039/0036—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use characterised by a septum having particular features, e.g. having venting channels or being made from antimicrobial or self-lubricating elastomer
  • A61M2039/0072—Means for increasing tightness of the septum, e.g. compression rings, special materials, special constructions
• • 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
  • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
  • A61M39/22—Valves or arrangement of valves
  • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
  • A61M2039/267—Valves closing automatically on disconnecting the line and opening on reconnection thereof having a sealing sleeve around a tubular or solid stem portion of the connector

Definitions

• the invention relates to a connector for a fluid circuit, in particular for medical use.
• a connector for a fluid circuit, in particular for medical use.
• such a connector is described as comprising a body delimiting a tubular chamber, the body being formed of a base comprising a locking upstream connection consisting of a male "Luer-lock” connection, as well as a a housing, assembled on this base, having a locking downstream connection constituted by a female "Luer-lock” connection.
• a stainless steel tube is fitted and / or welded in the lock and an elastomeric membrane, called a septum, is pushed into a passage formed by the female Luer-lock fitting of the housing by a spring. This membrane is slotted in order to allow the tube to pass through said membrane.
• the seal of the assembly is ensured at the level of the lock and the tube by the clamping between these during the fitting and / or the welding used for connect them, at the level of the tube and the septum by the clamping between the tube and the septum and at the level of the septum and the casing at the passage formed in the female Luer-lock fitting by the clamping between said septum and the casing, which ensures in addition the closure of the slit made in the septum.
• a male luer connector present on an element to be connected, is connected to the connection device and pushes the septum into the tubular chamber.
• the tube then passes through the slit made in the septum and enters a hole of the connected male luer fitting.
• the seal is ensured by the contact at the end of the cone of the male Luer connector connected against the septum, by the clamping between the tube and the septum, as well as by the clamping and / or the welding performed (s) between the tube and lock.
• the connector of EP 0 544 581 is often brought to be connected to a syringe having a male Luer type connection for injections.
• These syringes are often equipped with a single male Luer type fitting. It is therefore necessary that these syringes stand alone by tightening the cone of the male Luer connector of the syringe in the female Luer cone of the downstream connection of the connecting device housing, this female Luer cone being truncated therefore shorter.
• This is incompatible with the use of a stiff spring pushing the septum in the passage of the female Luer-lock fitting of the housing, that is to say having a strong thrust connection, and therefore disconnection.
• the connection effort is limited to around 30-35 newtons.
• the spring can not exert a strong push at the disconnection on the septum to bring it back into the passage of the downstream connection of the housing.
• the casing and the tube by siliconization for example, it is not possible to conceive a large frictional clamping of the septum in the passage of the downstream coupling Luer-lock female crankcase, and therefore it n It is not possible to conceive of a major crushing of the septum cleft at rest.
• the connector of EP 0 544 581 has a limited resistance against back pressure, typically of the order of 10 5 Pa, which means that the connector, used as a plug, has difficulty not open at the septum gap if the pressure in the closed circuit by the connecting device becomes greater than 1 bar. It should be noted that this pressure is easily reached with syringes, syringe pumps and pumps, commonly used in the medical and hospital environment.
• An object of the invention is to provide a connector that can withstand higher counterpressures when used as a plug, while having a limited connection effort.
• a connector for a liquid circuit in particular for medical use, comprising means forming a substantially tubular chamber between a downstream connection and an upstream connection, the downstream connection delimiting a passage, a tube fixed hollow in the chamber and intended to communicate between them upstream and downstream connections, a septum comprising a slot in a thickness to be traversed by the hollow tube, and mounted in the passage so as to slide between a stable down position closing of the passage without being traversed by the hollow tube, and an upstream position of operating by being traversed by the hollow tube through the slot, the connector further comprising elastic necking means of at least a portion of the thickness of the septum around the slot.
• the connector according to the invention has at least one of the following characteristics: the passage comprising at a downstream end of the chamber a rim surrounding the passage, the septum having a shoulder on an outer periphery, the connector comprises stiff reinforcement means mounted on the shoulder and intended to bear on the flange when the septum is in the stable downstream position of closure; rigid reinforcing means comprise a rigid cup whose flank extends around the septum upstream of the shoulder; o the rigid cup comprises at an upstream end of the flank a shoulder extending radially outwardly and intended to abut with a second shoulder located in the chamber when the septum is in steady down position of closure; the rigid cup comprises means for retaining the septum; the retaining means comprise a series of pins penetrating into the shoulder of the septum; o the reinforcement means further comprise a septum encapsulation washer in the reinforcing means; the elastic necking means comprise an elastically deformable ring; o the septum is forced into the ring; the ring
• FIG. 1 is a view in longitudinal section of a connector according to the invention, in the stable downstream position of closure;
• FIG. 2 is a sectional and three-dimensional view of the septum of the connector of FIG. 1 equipped with a necking ring and a reinforcing cup;
• FIG. 3 is a sectional and three-dimensional view of the cup and the necking ring before mounting on the septum of FIG. 2;
• FIG. 4 is a view in longitudinal section of the connector according to FIG. 1 in the upstream operating position; and,
• FIG. 5 is a sectional and three-dimensional view of an alternative embodiment of the septum of the connector of FIG. 1 equipped with a necking ring, a reinforcing cup and an encapsulation washer.
• a connector 1 according to the invention comprises a base 2 and a casing 3 mounted on the base 2.
• the assembly of the casing 3 on the base 2 makes it possible to delimit a substantially tubular chamber 10.
• the base 2 comprises an upstream connection 21, 22, here, male luer-lock type. Embroidered in this base 2, the connector
• the connection device or connector 1 comprises a spring 5, here in the form a compression coil spring, but which can also take any other form known to those skilled in the art.
• the spring 5 is intended to bear on the base 2 and to push the septum 6 so that the latter comes into a stable downstream position of closing the passage 7, as shown in Figure 1.
• EP 0 544 581 A more detailed description of the connector 1 is provided EP 0 544 581 to which it is possible to refer for this purpose.
• the casing comprises, at the passage 7, a first rim 71 extending in the substantially tubular chamber 10 and surrounding said passage 7.
• the rim 71 is surmounted in the downstream direction by a frustoconical portion 72 connecting the flange 71 with the conical wall 74 of the passage 7.
• the casing 3 comprises a second flange 31 projecting in the substantially tubular chamber 10 and located upstream of the first flange 71.
• the septum 6 is, here, an elastomeric membrane of cylindrical general shape of revolution having a slit 8 substantially flat and perpendicular to a longitudinal axis of the septum 6.
• This slot 8 extends from a downstream surface 60 into an upstream opening 61 of substantially cylindrical shape of revolution for receiving a free end of the hollow tube 4 sealingly.
• the septum 6 further comprises a shoulder 62 extending circumferentially on an outer periphery of the septum 6.
• the septum 6 is mounted in a rigid cup 11 forming part of reinforcement means.
• the rigid cup 11 comprises a flange 113 which, when the septum is mounted in the rigid cup 11, bears on the shoulder 62 of the septum 6.
• a radially inner edge of the flange 113 comprises a series of pins 114 extending in protruding from the edge of the flange substantially parallel to the longitudinal axis of the septum and towards the downstream.
• the series of pins 114 is preferably uniformly distributed over the edge of the flange 113 of the rigid cup 11.
• the rigid cup 11 has a side wall 112 extending from the flange 113 to a shoulder 111 preferably substantially parallel to the longitudinal axis of the septum 6 and in the downstream direction of the septum 6.
• the side wall 112 forms a flank extending around a downstream portion of the septum 6 upstream of the shoulder 62 of said septum 6.
• the shoulder 111 extends here preferably circumferentially and radially outwardly from the side wall 112.
• the rigid cup 11 is solid or honeycombed. As an alternative embodiment, it can be integrated into the septum by overmolding the latter around.
• On the flange 113 of the rigid cup 11 is mounted a ring 9 elastically deformable.
• the ring 9 has a base 92 resting on the top of the flange 113 of the rigid cup 11. As illustrated in FIG. 3, the ring 9 is overmoulded on the rigid cup 11 which has, for this purpose, on the top flange 113, cavities 93 defined by protrusions 115 issuing from the material of the flange 113 and protruding from said flange 113, and uniformly distributed over a circumference of the flange 113 in which, during an overmolding of the ring on the rigid cup, the material of the ring fills the cavities 93. Overlying the base 92 of the ring 9, the latter comprises a circumferential bead 91 which, in a state of rest, as illustrated in FIG.
• the bead 91 is elastically deformable.
• the septum 6 is force-fitted into the ring 9, which has the effect of elastically deforming the bead 91 of the ring 9 in a radially outward manner.
• a necking is performed in part of the thickness of the septum 6 all around of the slot 8. This has the effect and role of ensuring the sealing of said slot 8.
• the assembly has a greater resistance against back pressure when the connector according to the invention is used as a plug.
• the ring 9 thus forms means of elastic strictions.
• the constriction means comprise, instead of the ring 9, a series of fingers or excrescences uniformly distributed or not on a circumference of the flange 113 of the cup and projecting from that of -this.
• the series of fingers or excrescences are elastically deformable. At rest, the series of fingers or excrescences form a cone, the free ends of the fingers or protrusions extend into the central passage.
• the septum 6 is force-fitted between the series of fingers or protrusions which has the effect of elastically deforming radially outwardly said fingers or excrescences.
• constriction means can be used alone, without being mounted on the cup 11.
• Figure 1 shows the connection device or connector 1 according to the invention in a stable downstream position of closure.
• the septum 6 sealingly closes the passage 7 so that the downstream surface 60 of the septum 6 touches the downstream end of said passage 7.
• a manipulator of the connection device according to the invention 1 can easily clean the downstream surface 60 of the septum 6, to minimize the risk of nosocomial infections that could result from improper cleaning or cleaning of this surface.
• the flange 113 of the rigid cup 11 abuts on the first flange 71 of the casing 3, on the one hand, and, on the other hand, the shoulder 111 of the rigid cup 11 bears on the second flange 31 of the casing 3.
• the base 92 of the ring 9 mounted on the flange 113 of the rigid cup 11 is interposed between said flange 113 and the first flange 71 of the housing 3 when the assembly is in a down position Stable shutter.
• the role of the rigid cup 11 is to prevent that, under a counterpressure, the septum 6 is expelled through the passage 7.
• the tightness of the assembly against pressure is greatly increased, without destroying the performance in terms of connections / disconnections repeated.
• the use a rigid cup 11 prevents any expulsion of the septum 6 outside the connection device or connector 1 according to the invention under the effect of high pressures.
• This septum assembly 6 and reinforcement cup of FIG. 5 differs from that of FIG. 2 by the addition of an encapsulation washer 12.
• the encapsulation washer 12 comprises an annular body 121 whose radially external diameter is substantially equivalent to a radially inner diameter of the wall 112 of the reinforcing cup 111.
• the encapsulation washer further comprises a shoulder 123 extending radially outwardly projecting from the annular body 121. This particular form of the encapsulation washer allows him, during an assembly, to be fitted in the lower part of the reinforcing cup 11 at the shoulder 111 of the latter.
• the complementarity of shapes between the encapsulation washer 12 and the reinforcing cup 11 allows the annular body 121 of the encapsulation washer 12 to penetrate into the reinforcing cup 11 until an upper edge of the shoulder 123 of the encapsulation washer 12 comes to bear on a lower edge of the shoulder 111 of the reinforcing cup 11.
• the septum 6 is completely encapsulated in the reinforcing cup 11 as shown in FIG. this prevents the septum 6 from being driven out of the reinforcing cup 11 during repeated connections of the connector according to the invention.
• the annular body 121 has a lower bearing face 122, located here, recessed axially relative to a lower flange of the shoulder 123. Once the connector mounted, the spring 5 bears on this face 122.
• the encapsulation washer is force-fitted into the reinforcement cup or else fitted into the latter.

Applications Claiming Priority (2)

Publications (1)

Family

ID=39689301

Family Applications (1)

Country Status (3)

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Family Cites Families (3)

• 2008
  • 2008-03-27 FR FR0851993A patent/FR2929123B1/fr active Active
• 2009
  • 2009-03-27 EP EP09724069A patent/EP2282805A1/de not_active Withdrawn
  • 2009-03-27 WO PCT/EP2009/053687 patent/WO2009118417A1/fr active Application Filing

Non-Patent Citations (1)

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