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
  • A61M5/178—Syringes
  • A61M5/28—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
  • A61M5/281—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule
  • A61M5/282—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule by compression of deformable ampoule or carpule wall
• • 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
  • A61M5/178—Syringes
  • A61M5/28—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
  • A61M5/285—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle with sealing means to be broken or opened
  • A61M5/288—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle with sealing means to be broken or opened by piercing without internal pressure increase
• • 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
  • A61M5/178—Syringes
  • A61M5/31—Details
  • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
  • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
  • A61M5/347—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub rotatable, e.g. bayonet or screw

Definitions

• the present invention relates to a syringe comprising a syringe body in which is defined a variable volume chamber containing the liquid to be injected and means for varying the volume of said chamber, the actuation of which enables the liquid to be expelled by reducing the volume out of the chamber, through an outlet orifice, as well as a needle device capable of being mounted on the end of said body, which comprises said orifice.
• Known syringes of this type comprise a cylindrical body in which is axially movable a piston which constitutes the means for varying the volume of the aforementioned chamber and is provided with a rod ending in a manual actuation head.
• a major drawback lies in the fact that the syringe bodies cannot be dispensed in the filled state to the users. In fact, when the syringe is filled, the piston is only slightly axially engaged in the body and the rod is almost entirely outside of the latter. It is obvious that in this state, the syringes are only difficult to transport.
• the filling operation of the syringe should be carried out instead of using the syringe, which is not always without breaking the general rules of hygiene.
• the syringe when filled, has a total length which is almost double the length of its cylindrical body, the person giving the injection must handle the syringe using both hands. It is common to use syringes also for blood tests. However, since the syringes in the filled state are difficult to transport, the blood should then be transferred to another container which is transportable. It is obvious that such a transfer of blood involves a risk of contamination of the blood.
• the present invention aims to provide a syringe which no longer has the considerable drawbacks which have just been stated.
• a syringe according to the invention is characterized in that its body has, in an axial view, a substantially triangular shape, that the outlet orifice is located at a corner of the triangle and in that at least the external walls of said body, which are parallel to the surface of said triangle, and that located opposite said orifice are deformable o and the walls delimiting the two sides of the triangle which are adjacent to said corner are capable of being brought together one on the other by applying pressure to said body at the two other corners of the triangle.
• the syringe body has a general accordion configuration, where the fold lines converge towards the aforementioned outlet orifice, the actuating walls being advantageously rigid and having at level 0 of said orifice pivot zones.
• the chamber of the syringe body when filled, is closed by a tearable closure member such as a seal, which is located at the outlet of the the syringe.
• the needle device is adapted to be fitted onto the part of the syringe which comprises the outlet orifice, by a movement in the axial direction of the syringe and comprises at the inside a member for tearing the abovementioned closure member during said axial fitting movement.
• FIG. 1 is a schematic perspective view of a syringe according to the present invention.
• FIG. 2 is a sectional view along line II-II of Figure 1;
• FIG. 3 is a side view of a syringe body according to the invention in its state of lower • volume.
• the reference symbols 1 and 2 respectively designate the body of the syringe of the invention and its needle device which is capable of being fitted onto the body 1 by a movement in the direction of the XX axis in the direction of the arrow F.
• the body of the syringe 1 has the general configuration of a bellows having in an axial section the shape of a triangle.
• the end 3 comprising the orifice 4 of the syringe is located at a corner of the triangle.
• the lateral external walls 6 which are parallel to the triangular cross-section and the wall 7 situated opposite the end 3 with the orifice 4 are deformable and have in the embodiment shown an accordion configuration, the fold lines of the surfaces 6 converging towards the end 3.
• the upper and lower walls 8 and 9 which extend perpendicular to the deformable walls 6 and 7 have a generally rectangular shape.
• the end 3 of the syringe body 1 has a generally cylindrical shape whose axis coincides with the axis XX of the syringe and has an axial channel 14 which communicates with the chamber 13 and opens at its other end towards the outside, through the outlet orifice 4.
• the cylindrical external surface of the end 3 carries a helical rib 16 which extends over a length corresponding to an angle advantageously between 90 and 180 °. The function of this rib will be explained later.
• the injection liquid is introduced into this chamber and the latter is then closed at 1 using a member such as a cover 17 at the outlet orifice 4.
• the needle device 2 has a body 19 for supporting the needle 20 of the syringe and has on the side adjacent to the end 3 of the syringe body 1 a cylindrical bore 21 having a diameter slightly greater than the external diameter of the end 3.
• a helical groove 22 which is intended during the fitting of the needle device 2 on the end 3 of the syringe body 1 to cooperate with the helical rib 16 of the latter in the manner of a thread.
• the needle 20 penetrates axially into the bore 21 over a sufficient length indicated at 25 to be able to pierce the seal 17 for closing the chamber 13 during the fitting of the device 2 on the body of syringe 1.
• the body of the needle 2 with a spacer 23, which could be in the form of a single rod, to lock the body 1 to the maximum volume state of the chamber 13.
• the ends of the rod 23 could be provided with small projections capable of engaging in suitable recesses, formed in the internal surfaces of the actuating walls 8 and 9 from the syringe.
• the syringe body is shown in its position of smallest volume.
• a U-shaped member 24 can be provided to lock the body in this position.
• the deformable walls could be produced in any other known manner.
• the deformable walls 6 and 7 could be made of an elastically deformable material. In the filled state, these walls could be in the elastically stretched state. This state could be maintained by appropriate return means acting between the walls 8 and 9 of the syringe so that the liquid is always ejected by manual actuation of the syringe.
• the syringe body could have any other suitable shape. It is only important that the reduction in chamber 13 can be obtained by bringing together at least two walls of the body.
• the cooperating parts of the syringe body and of the needle device may also have any other appropriate complementary shape. For example, they could have a conical shape.
• the syringe body 1 is in one piece. According to a second embodiment, this body could also be made in two separate and assembled parts.
• a part could be constituted by an envelope intended to contain the liquid and having a general shape corresponding to that of the body 1 shown.
• the other part would be made in the form of a part of the refillable cartridge type, which would then comprise the end body 3 and the pivoting rigid walls 8, 9 of the syringe shown.
• the envelope would be insertable into this cartridge body and would include a tubular outlet part which would be capable of engaging in the axial channel 14 and could even pass through it so that it can then be taken when the needle device is mounted on the end 3 of the cartridge body between the front faces of this device and the end 3.
• the cover 17 would be located in this tubular part.
• This second embodiment would allow the cartridge body to be reused and it would then suffice to distribute only the envelopes filled with the liquid to be injected.
• One solution to this problem would consist in using the state of compression of the syringe body, that is to say the approximation of the rigid walls 8 and 9 during their pivoting around the axes YY. Thus the angle between these two walls would constitute a visual reference of the quantity of liquid still contained in the syringe and / or of the quantity which has already been injected.
• an element in the form of a triangular plate or a tongue which would be integral with one of the walls 8 or 9 and would extend in a perpendicular plane to the pivot axes YY, so that the other wall moves during the compression of the syringe along this element.

Landscapes

• Health & Medical Sciences (AREA)
• Vascular Medicine (AREA)
• Engineering & Computer Science (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Hematology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9368034

Family Applications (1)

Country Status (3)

Families Citing this family (9)

Family Cites Families (9)

• 1988
  • 1988-07-04 FR FR8809020A patent/FR2633519A1/fr not_active Withdrawn
• 1989
  • 1989-07-04 EP EP19890908219 patent/EP0404860A1/de not_active Withdrawn
  • 1989-07-04 WO PCT/FR1989/000347 patent/WO1990000072A1/fr not_active Application Discontinuation

Non-Patent Citations (1)

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