FR2462168A1 - CONNECTION FOR DISCONTINUOUS INJECTIONS IN AN INFUSION LINE - Google Patents

Abstract

THE INVENTION CONCERNS A FITTING CONSTITUTED BY A BLOCK WHICH IS CROSSED BY A MAIN INFUSION CHANNEL AND WHICH INCLUDES A SECONDARY CHANNEL, THE SECONDARY CHANNEL PRESENT AN INJECTION INPUT AND AN OUTPUT WHICH OPENS INTO THE MAIN CHANNEL AND WHICH IS CONTROLLED BY A SECONDARY CHANNEL ELASTICALLY DEFORMABLE PRESSURE SHUTTER. IT IS CHARACTERIZED IN THAT THEIT SHUTTER IS A HOLLOW ORGAN OF OGIVAL INTERNAL SHAPE WHICH IS LODGED IN THE SECONDARY CHANNEL AND WHICH MARKINS THE INTERIOR SURFACE BY CLOSING THE SAID OUTLET BY ITS CONCAVE PART WHICH IS DIRECTED TOWARDS THE SAID OUTLET AND IS PUNCHED. MICRO-ORIFICE. THIS MATERIAL IS SUITABLE FOR DISCONTINUOUS AND REPETITIVE INJECTIONS.

Description

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  The invention relates to a connection allowing

  discontinuous injections into an infusion line.

  When treating a patient in intensive care, it is often necessary to inject into the bloodstream a fixed, limited dose of drugs. This injection must be repeated most of the time at a

  certain frequency, depending on the type of medication.

  Generally, such a patient is already under perfusion or transfusion. The discontinuous, repetitive injection can therefore be done by connecting in parallel on the infusion line. When not in use, the connection is sealed by a tap or a plug provided for this purpose. The injection can also be carried out using a needle and a syringe, which is not ideal when the operation is

repeat many times.

  The subject of the invention is a coupling enabling access to the main infusion line without effecting

  manipulations other than the connection of the syringe, the sealing

  being done by an automatic device such that the pressure in the secondary channel ensures communication with the main passage, the passage closing automatically

when this pressure drops.

  According to the invention, the connection is constituted by a block which is crossed by a main infusion channel and which comprises a secondary channel, the secondary channel having an injection inlet and an outlet which opens into

  the main channel and which is controlled by an elastic shutter

  deformable to pressure, characterized in that said shutter is a hollow organ of internal ogival shape which is

  housed in the secondary canal and which marries the

  by closing off said exit by its concave part which is

  directed towards said outlet and is pierced with a micro-orifice.

  The single figure of the attached drawing is a section

  of a connection according to the invention.

  The coupling is a block 1 which has a rectilinear main channel 2 and a rectilinear secondary channel 3 which extend in two perpendicular directions, the axes 6.7

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  both channels being coplanar. The secondary channel opens into the main channel via an exit 4 opposite to the entrance of the

secondary channel.

  The outlet 4 is closed by a piece 5 made of plastic, for example rubber elastomer or silicone. The part 5 is of internal ogival shape and its concave part is directed towards the exit 4. The longitudinal axis of the

  piece is confused with that of the secondary channel.

  -The part 5 has a shoulder 9 abuts against a corresponding shoulder 10 of the channel wall

  secondary, which defines the position of the part in the channel.

  The inlet 14 of the secondary channel is provided with an extension 19 which, on the one hand, constitutes a connection having an internal conicity suitable for receiving the outlet of an injection apparatus and, on the other hand, serves as a support for a plug

  removable 11 secured to the piece 19 by a tab 12. Preferably

  the coin 10, the cap 11 and the leg 12 come together

Manufacturing.

  The position of the piece 19 is defined for example by introducing an end 1g of the piece into the secondary channel and abutment of a shoulder 13 of the piece against

  the input edge of the secondary channel.

  Room 19 is fixed in the desired location

by gluing or welding.

  The part 5 is pierced with a micro-orifice 8 -which, during an increase in the pressure in the secondary channel, opens sufficiently to ensure communication between the two channels. When the secondary channel is at atmospheric pressure, the ogival shape of the part ensures a perfect seal under the pressure prevailing in the main channel. The elastomer part must, however, be rigid enough to be perfectly sealed during a depression in the main channel. The plug 11 adaptable to the secondary channel, however, gives any assurance in such a situation.

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  The connection can take two forms: - as such, that is to say as a piece

  adaptable on an infusion line, a catheter, a cannula.

  In this case, both ends of the main channel are adapted, for example as shown; - either overmoulded or glued directly to a tube (cannula or catheter)

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R E V E N D I C A. T I 0 N S

  1. A connection constituted by a block which is inverted by a main infusion channel and which comprises a secondary channel, the secondary channel having an injection inlet and an outlet which opens into the main channel and which is controlled by a shutter elastically deformable to the pressure, characterized in that said shutter is a hollow organ of internal ogival shape which is housed in the secondary channel and which marries the inner surface by closing said outlet by its concave part which is directed towards said

  exit and is pierced with a micro-orifice.

  2. Connection according to claim 1, characterized in that the shutter has a shoulder abutting against a

  corresponding shoulder of the wall of the secondary channel.

  3. Connection according to claim 1 or 2, characterized in that the inlet of the secondary channel is extended by a part which constitutes a connection for the exit of a

  injection device and which serves as a support for a removable cap.

  4. Connection according to claim 3, characterized

  in that the piece and the stopper came together to

with a leg that connects them.

  5. A coupling according to claim 3 or 4, characterized in that the piece is inserted into the inlet of the secondary channel and abuts against the inlet edge of the

secondary channel.

  6. Connection according to one of claims 1 to 5,

  characterized in that the main channel is adapted to both

  ends for introducing the fitting into a line.

  7. Connection according to one of claims 1 to 5,

  characterized in that the main channel is provided with a

  end of a tube integral with the connector.