WO2020249349A1 - Seringue jetable - Google Patents

Seringue jetable Download PDF

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Publication number
WO2020249349A1
WO2020249349A1 PCT/EP2020/063298 EP2020063298W WO2020249349A1 WO 2020249349 A1 WO2020249349 A1 WO 2020249349A1 EP 2020063298 W EP2020063298 W EP 2020063298W WO 2020249349 A1 WO2020249349 A1 WO 2020249349A1
Authority
WO
WIPO (PCT)
Prior art keywords
pull
catch
cylinder
out lock
disposable syringe
Prior art date
Application number
PCT/EP2020/063298
Other languages
German (de)
English (en)
Inventor
Johannes Bolz
Joerg Wende
Marcus BOETH
Mayur Suresh DUDHANE
Original Assignee
B. Braun Melsungen Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by B. Braun Melsungen Ag filed Critical B. Braun Melsungen Ag
Publication of WO2020249349A1 publication Critical patent/WO2020249349A1/fr

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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
    • A61M5/50—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 having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
    • A61M5/502—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston
    • 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
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31501—Means for blocking or restricting the movement of the rod or piston
    • A61M5/31505—Integral with the syringe barrel, i.e. connected to the barrel so as to make up a single complete piece or unit
    • A61M2005/31506—Integral with the syringe barrel, i.e. connected to the barrel so as to make up a single complete piece or unit formed as a single piece, e.g. moulded
    • 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
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31501—Means for blocking or restricting the movement of the rod or piston
    • A61M2005/31508—Means for blocking or restricting the movement of the rod or piston provided on the piston-rod
    • 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
    • A61M5/50—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 having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
    • A61M5/502—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston
    • A61M2005/5033—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston by use of an intermediate blocking member positioned between the syringe barrel and the piston rod to prevent retraction of the latter, e.g. toothed clip placed on the piston rod

Definitions

  • the present invention relates to a disposable syringe for medical use, with a cylinder which has an outlet opening at its front end and in which a piston for emptying the disposable syringe is arranged and the piston can be moved by the action of force on a piston rod connected to the piston.
  • the piston rod is provided with at least one notch
  • the cylinder is provided with a pull-out lock, or vice versa.
  • the at least one catch on the one hand and the pull-out lock on the other hand are configured in such a way that the plunger can only be moved back as far as the pull-out lock or the catch after the disposable syringe has been emptied. This should not be intended
  • Such contaminants can be pathogens such as the pathogen of hepatitis (eg hepatitis B virus (HBV) or hepatitis C virus (HCV)), or the human immunodeficiency virus (HIV).
  • pathogens such as the pathogen of hepatitis (eg hepatitis B virus (HBV) or hepatitis C virus (HCV)), or the human immunodeficiency virus (HIV).
  • HBV hepatitis B virus
  • HCV hepatitis C virus
  • HCV human immunodeficiency virus
  • the disposable syringes currently on the market do not reliably ensure that these syringes are used only once. Disposable syringes are often used several times, even after extensive use, especially in countries with low or middle income
  • the present invention is therefore based on the object of making available a disposable syringe for medical use in which multiple uses that are not intended can be prevented more reliably than before.
  • a disposable syringe for medical use which has a cylinder with an outlet opening and a piston movable therein, the piston being movable in the cylinder by the action of force on a piston rod connected to the piston, and wherein the piston rod is provided with at least one foldable catch and the cylinder is provided with a pull-out lock, or vice versa; and wherein the at least one hinged catch on the one hand and the pull-out lock on the other hand are configured such that the piston can be pulled out of the
  • the object is achieved in particular in that a disposable syringe for medical use is made available, which has a cylinder with an outlet opening and a piston movable therein, the piston in the cylinder through
  • the piston rod is provided with at least one detent (also referred to as a detent hook) and with at least one abutment, and that the cylinder is provided on its inside with a pull-out lock, the at least one Notch and the at least one abutment on the one hand and the pull-out lock on the other hand are configured in such a way that the plunger can only be moved back to the pull-out lock (ie away from the outlet opening) after the disposable syringe has been emptied.
  • the piston rod is provided with at least one detent (also referred to as a detent hook) and with at least one abutment
  • the cylinder is provided on its inside with a pull-out lock
  • the at least one Notch and the at least one abutment on the one hand and the pull-out lock on the other hand are configured in such a way that the plunger can only be moved back to the pull-out lock (ie away from the outlet opening) after the disposable syringe has been emptied.
  • a disposable syringe for medical use which has a cylinder with an outlet opening and a piston movable therein, the piston in the cylinder by force is movable on a piston rod connected to the piston, and that the cylinder is provided with at least one catch on the inner wall, and the piston rod with a pull-out lock (projection or
  • Protrusion hereinafter jointly referred to as “protrusion"
  • the at least one catch on the one hand and the pull-out lock on the other hand being configured so that the plunger can only be moved back as far as the catch after emptying the disposable syringe.
  • Pull-out lock and the at least one hinged catch for example the presence of the pull-out lock on the inside of the cylinder on the one hand and the at least one catch and the at least one abutment on the piston rod on the other hand, or the presence of the pull-out lock on the piston rod on the one hand and the at least one catch on the inner wall of the cylinder
  • the syringe can be refilled with the liquid to be injected after it has been used for the first time and administered to another patient. Refilling the syringe with the liquid to be injected is made possible by the
  • Disposable syringe designed according to the invention in particular prevents the plunger from being able to be removed from the cylinder after the syringe has been emptied or from being able to be removed from the cylinder to the required extent
  • Disposable syringe according to the invention moreover very easy to train and diverse design options.
  • the function of the foldability of the catch can be ensured by a suitable shape and / or a suitable procedural shape of the catch, optionally in combination with a suitable flexible and / or bendable material from which the catch was designed or formed.
  • the present invention relates to a
  • Disposable syringe for medical use, with a cylinder which has an outlet opening at its front end and in which a piston for emptying the disposable syringe from the outlet opening is arranged, the piston in the
  • Cylinder is movable by the action of force on a piston rod connected to the piston, characterized in that the piston rod is provided with at least one detent and with at least one abutment, and that the cylinder is provided on its inside (inner wall) with a pull-out lock, the at least a notch and the at least one abutment on the one hand and the
  • Pull-out lock on the other hand are configured so that the plunger can only be moved back as far as the pull-out lock after emptying the disposable syringe.
  • the outlet opening is a nozzle which can be conical.
  • the outlet opening can be arranged centrally or eccentrically.
  • a screw thread on the nozzle via which, for example, a cannula (hollow needle) can be attached via a cannula attachment or a hose.
  • a cannula is attached.
  • the cannula can be inseparably connected to the nozzle, for example the cannula can be glued in place.
  • the piston rod protrudes from the rear end of the cylinder.
  • the piston rod can be widened at the protruding end.
  • the disposable syringe can have a flange at the rear end of the cylinder (i.e. on the side facing away from the outlet opening) and / or at the end of the piston rod.
  • the widened end of the plunger rod and the flange allow the syringe to be better grasped when emptying.
  • the pull-out lock can be located anywhere on the inside of the cylinder, provided that, in conjunction with the abutment and the at least one notch after emptying the disposable syringe, it ensures that the plunger can only be moved back to the pull-out lock and that the notch is filled of the disposable syringe is on the side of the pull-out lock opposite the outlet opening. After using the disposable syringe (i.e. after the plunger has been pushed down and the solution to be injected has been expelled from the disposable syringe) the catch is then on the other side of the
  • the pull-out lock on the one hand and the abutment and the at least one catch on the other hand are arranged such that the piston can hardly be moved in the rearward direction of the cylinder after the preferably complete emptying of the disposable syringe.
  • the piston position before and after emptying depends on the width (i.e. the extent of the curvature along the cylinder) of the pull-out stop.
  • the pull-out lock is on the
  • the cylinder is provided with the pull-out lock at its rear end on the inside.
  • the pull-out stop can be an undercut.
  • the piston rod can be integrally connected to the piston, or the piston and piston rod can be constructed in several pieces.
  • the at least one catch and the at least one abutment on the one hand and the pull-out lock of the disposable syringe according to the invention on the other hand are configured in such a way that when the piston is moved in the direction of the front end of the cylinder - i.e. the end on which the outlet opening is located - the at least a detent folds by pulling over the pull-out lock in the direction of the side of the cylinder facing away from the outlet opening and can thus be moved past the pull-out lock, and the at least one detent moves when the piston is moved to the rear end of the cylinder (i.e. when the piston moves back away from the outlet opening of the cylinder) against the abutment, thus preventing further movement of the piston in the direction of the rear end of the cylinder.
  • a further movement of the piston in the direction of the rear end of the cylinder can be prevented by preventing the at least one catch from evading (folding back) in the direction of the outlet opening.
  • the catch can only fold in one direction (in the side of the cylinder facing away from the outlet opening) and then back in its direction
  • the at least one catch is flexibly movable and the abutment is rigid and immovable. The rest and that
  • Abutments can be formed integrally or in several pieces with the piston rod, and can preferably be made of the same material as e.g. Be made of plastic.
  • plastics suitable for this are known to the person skilled in the art, for example polypropylene or polyethylene.
  • the plastic is preferably latex-free and PVC-free as well as transparent, translucent or opaque. The materials used should be compatible with the injection agent.
  • the piston and cylinder can be made of the same material or can also be made of different materials.
  • the cylinder can be inside with a
  • the piston can have a piston stopper and one or more sealing rings, for example made of rubber.
  • the pull-out lock is in the interior of the
  • the pull-out stop is located in the inner wall of the cylinder.
  • the pull-out stop is located in the inner wall of the cylinder.
  • Pull-out stop is formed integrally with the cylinder, but it can also be retrofitted to the inner wall of the cylinder.
  • the pull-out stop and the cylinder are preferably made of the same material, for example
  • Polypropylene or polyethylene are Polypropylene or polyethylene.
  • the pull-out stop is designed as a curvature, this curvature forming a continuous ring on the inner wall of the cylinder.
  • the continuous ring is preferably located in the last fifth or eighth of the length of the cylinder on the inner wall of the cylinder.
  • Pull-out lock on the other hand, can ensure that the piston after the
  • the disposable syringe can only be moved back as far as the pull-out lock, they are configured accordingly with regard to their shape and nature.
  • the at least one catch is flexibly movable and the abutment is designed to be rigid and immovable.
  • the pull-out lock and especially the curvature formed for this project so far into the interior of the cylinder that a free
  • Diameter dO of the cylinder is defined which is equal to or greater than the diameter d1 defined by the abutment, but smaller than the diameter d2 defined by the end of the catch.
  • the configuration of the at least one notch and the abutment on the one hand and the pull-out lock on the other hand can be described as follows:
  • the notch is longer so that the plunger can only be moved back to the pull-out lock after emptying (preferably after completely emptying) the disposable syringe as the shortest distance from the pull-out lock to the piston rod, that is, the detent is longer than L2, and at the same time the detent is at most as long as the shortest distance from the inside of the cylinder, at a point where there is no pull-out lock , up to the piston rod.
  • the maximum length of the abutment corresponds to the shortest distance from the pull-out stop to the piston rod.
  • the configuration of the at least one catch and the abutment on the one hand and the pull-out lock on the other hand can be described as follows: To avoid the at least one catch without moving upwards (i.e. in the direction of the piston rod), away from the support surface of the abutment fold, can move past the pull-out lock, a notch is arranged directly adjacent to an abutment so that the notch is only in the direction of the
  • rear end of the piston rod on the side facing away from the abutment, can fold, with the notch from the surface of the piston rod to the inside or at least almost to the inside of the cylinder, at a point where there is no pull-out lock, flap-shaped extends so that the notch cannot move past the pull-out lock without folding up.
  • the abutment extends from the
  • the abutment is flat on the rear side, so that the at least one flap-shaped planar detent rests flat against this side of the abutment when the piston is moved back in the cylinder towards the rear end.
  • the at least one catch is / are directly adjacent to the corresponding at least one abutment, and is / are applied over the entire surface of the abutment.
  • the abutment can be shaped in any suitable manner known to the person skilled in the art, so that the at least one detent can lie against the abutment as described herein.
  • the side of the at least one abutment facing away from the contact surface of the at least one detent slopes downwards towards the side of the piston rod directed towards the outlet opening.
  • Integrated plunger stopper for example made of synthetic rubber.
  • the outlet opening can be in the form of a central or eccentric cone.
  • the disposable syringe according to the invention is a disposable article. As a result, it is desirable for it to be inexpensive to manufacture in a few work steps. This goal is achieved by the method according to the invention. In the production of the disposable syringe according to the invention, no additional components are required, and / or no change to an already existing tool concept is necessary. In one embodiment, the at least one abutment, the at least one catch and / or the pull-out lock can be used directly
  • Piston rod and / or the inside of the cylinder are formed. All that is required for this is the corresponding molding tools, such as an open-close tool.
  • the present invention thus also relates to a method for producing a disposable syringe according to the invention as described here, the
  • Piston rod is molded at least one notch and at least one abutment, and a pull-out lock is molded onto the cylinder on its inner wall, the at least one notch and the at least one abutment being molded in such a way that the piston only moves back to the pull-out lock after emptying the disposable syringe can be.
  • Embodiment B In a second embodiment B, the present invention relates to a
  • Disposable syringe for medical use, with a cylinder which has an outlet opening at its front end and in which a piston for emptying the disposable syringe from the outlet opening is arranged, the cylinder at the Inner wall is provided with at least one notch, and the plunger rod is provided with a pull-out lock, the at least one notch on the one hand and the pull-out lock on the other hand being configured so that the plunger only up to the notch (or the free end after emptying the disposable syringe) the rest)
  • the pull-out stop is designed as a protrusion on the outer wall of the piston rod that is directed into the interior of the cylinder.
  • the protrusion is preferably designed in a ring shape along the entire outer circumference of the piston rod.
  • the protrusion can be located at any point on the outer wall of the piston rod, provided that, in conjunction with the at least one detent located on the inner wall of the cylinder, it prevents the piston from moving back beyond the free end of the detent.
  • the free end of the catch is in the filled state of the disposable syringe on the side of the pull-out lock that faces the outlet opening. After using the disposable syringe (i.e. after the plunger has been pushed down and the solution to be injected has been expelled from the disposable syringe), the free end of the catch is then on the other side of the pull-out lock (i.e. on the one of the outlet opening
  • the protrusion can have any shape that allows the
  • Protrusion in the interaction (interaction) with the at least one notch, which is located on the inner wall of the cylinder, ensures that the piston after emptying, preferably complete emptying, of the disposable syringe only up to the pull-out lock (or until the inventive interaction of the
  • Protrusion with the at least one notch can be moved back.
  • the protrusion can be designed as a curvature directed into the interior of the cylinder, or it can be designed rectangular. It is preferred that the protrusion is rectangular.
  • the protrusion is located on the outer wall of the piston rod.
  • the protrusion is integral with the piston rod formed, but it can also have been attached subsequently to the outer wall of the piston rod.
  • the protrusion and the piston rod are preferably formed from the same material, for example polypropylene or polyethylene.
  • the protrusion is rectangular, it forming a continuous protrusion on the outer wall of the piston rod.
  • the protrusion is preferably located in the last fifth or eighth of the length of the piston rod on the outer wall of the piston rod.
  • the at least one catch and the protrusion are configured such that when the syringe is emptied, the protrusion is pulled over the at least one catch and the catch folds in the direction of the outlet opening. Since the catch is made of a flexible material, the catch then folds back into its original position. When the piston is moved back again (in the direction of the large opening at the rear end of the cylinder), the pull-out lock, which is located on the outer wall of the
  • Piston rod is located on the at least one notch, which is located on the inner wall of the cylinder. This prevents the piston from being pulled further out of the cylinder.
  • that end of the catch (the free end) which is in the direction of
  • Outlet opening of the cylinder is located, shaped so that it is flat on the
  • Protrusion rests when the protrusion has been moved over the notch and, if necessary, the piston has been moved back.
  • the side of the protrusion facing away from the outlet opening of the cylinder forms an approximately 90 ° angle with the piston rod.
  • that end of the catch which faces the outlet opening and which comes to rest on the side of the protrusion opposite the outlet opening is beveled in such a way that it rests flat on the protrusion.
  • the pull-out lock and the at least one catch on the one hand and the cylinder on the other hand work together in such a way that the piston can hardly be moved in the rearward direction of the cylinder after the preferably complete emptying of the disposable syringe, and hardly any more (preferably even no more) in the direction of the cylinder's exhaust port.
  • This can be caused by the fact that the diameter of the cylinder in the
  • the piston can therefore hardly be moved:
  • Movement in the direction of the upper end of the cylinder is prevented by the at least one detent that has been applied to the protrusion; and movement in the direction of the lower end (the end at which the outlet opening is located) is prevented by the then too small diameter of the cylinder.
  • the protrusion has at its longest point in the direction of the outer wall of the cylinder at a distance from the outer wall of the piston rod to the end of the protrusion, which is at least so large that the protrusion after it has passed the at least one notch has been pulled, by this, after it has been folded back into its original position, is prevented from being moved again towards the large opening at the rear end of the cylinder.
  • the protrusion is maximally so long that it reaches the inside of the cylinder and at the same time can still slide past the detent when the piston rod is moved downwards in the direction of the outlet opening.
  • the present invention also relates to a method for producing a disposable syringe according to the invention of embodiment B as described here, wherein the piston rod is molded with a pull-out lock, and the cylinder at the end opposite the outlet opening at least one notch is molded on the inside, the at least a detent is formed in such a way that a free end of the detent is located in the filled state of the disposable syringe on the side of the pull-out lock that faces the outlet opening, and the The pull-out lock cannot be moved back past the free end of the catch after the disposable syringe has been emptied.
  • the cylinder of the disposable syringe of both embodiments consists of a front and a rear (rear) end. At the front end the cylinder has an outlet opening, and at the rear end the cylinder has a larger opening through which the piston rod with the piston can be inserted into the cylinder.
  • the cylinder can have the same diameter over its entire length (at the points where there is neither a pull-out lock or highlight nor the at least one notch). It is also possible for the diameter of the cylinder to change at one end or at both ends, for example to widen or taper.
  • the cylinder tapers at its front end towards the outlet opening; this taper is preferably designed so that it can accommodate the piston of the piston rod.
  • the rear end of the cylinder widens towards the rear end, i. the diameter of the cylinder increases at its rear end. This enlargement of the diameter can take place continuously or in one or more steps.
  • Embodiment A preferably has a tapering of the cylinder at its front end, and additionally preferably no tapering at its rear end.
  • Embodiment B preferably has a tapering of the cylinder at its front end, and an increase in diameter at its rear end (towards the rear end).
  • Figures 1, 2 and 3 show an example of Embodiment A of the present invention
  • Figures 6, 7 and 8 show an example of the present invention
  • FIGS 1, 2, 3, 6, 7 and 8 each show in cross section a cylinder 4 which has an outlet opening 5 at its front end and in which a piston 6 and a piston rod 7 are movably arranged.
  • the piston rod 7 protrudes from the rear end of the cylinder 4 (the opening of the cylinder facing away from the outlet opening).
  • the circle indicates which area of the figure in the lower part of the
  • FIGS 1, 2 and 3 show schematically how by pressing down
  • the notches 1 rest against the pull-out lock 3 and the abutment 2 (on the one of the outlet opening facing side). In the event of increased tension and deflection, the notches 1 lie against the abutment (counter bearing) 2 and prevent the notches 1 from evading in the direction of the outlet opening (ie the notches only move into the
  • the notches can be implemented in the open-close tool.
  • FIG. 1 shows a state in which a piston rod 7 is pushed down.
  • Figure 2 shows a state in which the piston rod 7 is pressed down further.
  • the notch 1 is longer than the shortest distance from the pull-out lock 3 to the piston rod 7 (without abutment 2). In other words, notch 1 is longer than L2. At the same time, the notch 1 is at most as long as the shortest distance L1 from the
  • the maximum length L2 of the abutment 2 corresponds to the shortest distance from the pull-out lock 3 to the piston rod 7.
  • FIG. 3 shows a position of the piston rod 7 in which the catch 1 has placed itself against the pull-out lock 3 due to its shape and nature. If an attempt is now made to pull the piston rod 7 out even further, the notches 1 rest against the abutment 2, which prevents the notches 1 from evading. This prevents the piston rod 7 from being pulled out.
  • L1 is the shortest distance from the inside of the cylinder 4 at a point where there is no pull-out lock 3 to the piston rod 7.
  • L1 is also the maximum length of the catch 1.
  • d0 denotes a free diameter of the cylinder 4 which is equal to or greater than the diameter d1 defined by the abutment 2, but smaller than the diameter d2 defined by the end of the catch 1.
  • dO is defined as the diameter measured from the common central axis of the cylinder 4 and the piston rod 7 to the point of the pull-out lock 3 which protrudes farthest from the inside of the cylinder 4 into the interior of the cylinder 4.
  • d1 is defined as the diameter measured from the common central axis of the cylinder 4 and the piston rod 7 to the end of the abutment 2.
  • d2 is defined as the diameter measured from the common center axis of the cylinder 4 and the piston rod 7 to the inside of the cylinder 4 at a point on the inside of the cylinder 4 at which there is no pull-out lock 3.
  • FIG. 4 shows an embodiment of the disposable syringe according to the invention (without cannula).
  • Figure 5 shows the embodiment of Figure 4 in cross section.
  • FIGS 6, 7 and 8 show schematically how by the Fiery print
  • FIG. 6 shows a state in which a piston rod 7 is pushed down.
  • FIG. 8C shows the state in which the catch 1 rests flat on the protrusion 3.
  • FIG. 7 shows a state in which the piston rod 7 is pushed down further.
  • the catch 1 folds inwards in the direction of the inner wall of the cylinder 4.
  • the protrusion 3 is at most so long that it extends to the inside of the cylinder 4, and at least long enough that it, after sliding over the catch 1, by interacting with this prevents the piston 6 from being able to be pulled out of the cylinder 4.
  • FIG. 7 B shows how the highlight 3 slides over the catch 1.
  • FIG. 8 shows a position of the piston rod 7 in which the catch 1, due to its shape and nature, has placed itself against the highlight 3 (pull-out lock).
  • FIG. 9 shows an embodiment of the disposable syringe according to the invention (without cannula).
  • FIG. 10 shows the embodiment of FIG. 9 in cross section.
  • the piston rod 7, which tapers towards the end of the cylinder 4 opposite the outlet opening 5, can be clearly seen.
  • the piston rod 7 has been moved in the direction of the outlet opening 5, and the catch 1, which is flat on the Pull-out lock 3 rests on it, prevents the piston rod 7 from being able to be moved backwards (in the direction opposite the outlet opening 5).

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  • 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)

Abstract

La présente invention concerne une seringue jetable à usage médical, pourvue d'un cylindre qui présente à son extrémité avant une ouverture de sortie et dans lequel est disposé un piston destiné à vider la seringue jetable, et le piston peut être déplacé à la suite d'une force exercée sur une tige de piston reliée au piston. La tige de piston est pourvue d'au moins un cran d'arrêt, et le cylindre est pourvu d'un dispositif anti-extraction, ou inversement. En outre, le ou les crans d'arrêt d'une part et le dispositif anti-extraction d'autre part sont configurés de sorte que le piston, une fois la seringue jetable vidée, ne peut être ramené que jusqu'au dispositif anti-extraction ou jusqu'au cran d'arrêt. L'invention permet de cette manière d'empêcher des réutilisations non prévues de la seringue jetable.
PCT/EP2020/063298 2019-06-13 2020-05-13 Seringue jetable WO2020249349A1 (fr)

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DE102019208634.9 2019-06-13
DE102019208634.9A DE102019208634A1 (de) 2019-06-13 2019-06-13 Einmalspritze

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WO2020249349A1 true WO2020249349A1 (fr) 2020-12-17

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DE (1) DE102019208634A1 (fr)
WO (1) WO2020249349A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610668A (en) * 1985-10-02 1986-09-09 Fleig John A Preselected multiple dosage syringe
CA2329707A1 (fr) * 1998-04-30 1999-11-04 Abbott Laboratories Ensemble seringue
US20080154213A1 (en) * 2006-12-21 2008-06-26 Bruce Leigh Kiehne Syringe with multiple plunger locks
WO2009100644A1 (fr) * 2008-02-04 2009-08-20 Dongsen Fang Injecteur sûr à rétraction automatique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4493703A (en) * 1982-03-31 1985-01-15 Butterfield Group Hypodermic syringe cartridge with non-retractable drive piston
WO1989009073A1 (fr) * 1988-03-28 1989-10-05 Sang Don Lee Agencement d'aiguille a mecanisme de blocage dans une seringue hypodermique
US5106372A (en) * 1991-05-03 1992-04-21 Sherwood Medical Company Single use syringe
EP1106194A1 (fr) * 1999-12-03 2001-06-13 Euro-China Farma, S.L. Seringue jettable à usage unique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610668A (en) * 1985-10-02 1986-09-09 Fleig John A Preselected multiple dosage syringe
CA2329707A1 (fr) * 1998-04-30 1999-11-04 Abbott Laboratories Ensemble seringue
US20080154213A1 (en) * 2006-12-21 2008-06-26 Bruce Leigh Kiehne Syringe with multiple plunger locks
WO2009100644A1 (fr) * 2008-02-04 2009-08-20 Dongsen Fang Injecteur sûr à rétraction automatique

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Publication number Publication date
DE102019208634A1 (de) 2020-12-17

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