WO2006111861A2 - Injection set and injection assistance device - Google Patents

Injection set and injection assistance device Download PDF

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Publication number
WO2006111861A2
WO2006111861A2 PCT/IB2006/001354 IB2006001354W WO2006111861A2 WO 2006111861 A2 WO2006111861 A2 WO 2006111861A2 IB 2006001354 W IB2006001354 W IB 2006001354W WO 2006111861 A2 WO2006111861 A2 WO 2006111861A2
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WO
Grant status
Application
Patent type
Prior art keywords
injection
sleeve
body
position
assistance device
Prior art date
Application number
PCT/IB2006/001354
Other languages
French (fr)
Other versions
WO2006111861A3 (en )
Inventor
Guillaume Grunhut
Frédéric PEROT
Laurent Barrelle
Original Assignee
Becton Dickinson France
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

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/46Devices 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 controlling depth of insertion
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/20Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M5/2033Spring-loaded one-shot injectors with or without automatic needle insertion
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3257Semi-automatic sleeve extension, i.e. in which the triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension means
    • A61M5/326Fully automatic, i.e. in which the triggering does not require a deliberate action by the user
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/20Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M2005/2006Having specific accessories
    • A61M2005/2013Having specific accessories triggering of discharging means by contact of injector with patient body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/20Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M2005/206With automatic needle insertion
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/315Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M2005/31518Piston or piston-rod constructions, e.g. connection of piston with piston-rod designed to reduce the overall size of an injection device, e.g. using flexible or pivotally connected chain-like rod members
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3245Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3247Means to impede repositioning of protection sleeve from needle covering to needle uncovering position
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3257Semi-automatic sleeve extension, i.e. in which the triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension means
    • A61M5/326Fully automatic, i.e. in which the triggering does not require a deliberate action by the user
    • A61M2005/3267Biased sleeves where the needle is uncovered by insertion of the needle into a patient's body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3287Accessories for bringing the needle into the body; Automatic needle insertion
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50Devices 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
    • A61M5/5066Means for preventing re-use by disconnection of piston and piston-rod

Abstract

The present invention relates to an injection assistance device (101) for an injection device (3) for injecting a product (25) into an injection site (27) , comprising a body (2), a needle (7) and a piston plunger (26) characterized in that it comprises at least : a hollow sleeve (104) provided with one bearing surface (105) to come into contact with the injection site (27) , the said sleeve (104) allowing the axial mobility of the body between an initial position and an insertion position in which the needle (7) is exposed by a predetermined length L, a sleeve tube (106) comprising coupling means (111, 146) intended to connect the sleeve tube to the piston plunger (26) or to the said body (2) automatic-injection means (111; 139) for causing a movement in the distal direction of the said coupling means (146) from the said insertion position to an injection position.

Description

INJECTION SET AND INJECTION ASSISTANCE DEVICE

The present invention relates to an injection assistance device for an injection device and to an injection set provided with the said injection assistance device, these devices making it easier and safer to inject a product into an injection site.

In this application, the distal end of a component or of a device is to be understood as meaning the end furthest from the user' s hand and the proximal end is to be understood as meaning the end closest to the user's hand. Likewise, in this application, the "distal direction" is to be understood as meaning the direction of injection, and the "proximal direction" is to be understood as meaning the opposite direction to the direction of injection.

In order to administer a medicinal product by injection to a body, particularly the human body, there are various possible routes depending on the place in the body at which the said product is to be injected: thus, the product may be injected intravenously, intramuscularly, subcutaneously, into a joint, or else intradermally . In many of these cases, and, particularly when injecting subcutaneously, the depth to which the needle is inserted and therefore at which the product is injected is particularly significant.

Thus, it is possible to observe an adverse immunological reaction if, for example, a product that should have been injected into the subcutaneous tissues is finally injected into the intradermal tissues.

The operation of injecting a product using a syringe is particularly delicate. The patient may make an unforeseen movement or alternatively the person administering the injection might make a wrong move. Thus, errors in the depth to which the needle is inserted are particularly difficult to avoid and discrepancies of just a few millimetres may, themselves alone, lead to errors in injection depth.

As far as subcutaneous injection is concerned, there are various injection techniques currently used. Some users prefer to pinch the skin before inserting' the needle, others prefer not to, and still others angle the syringe before inserting it into the skin, it is therefore possible for this angle to vary from one user to another. The result of all this is that the depth to which the needle is inserted and therefore at which the product is injected may itself also vary, with the unpleasant consequences mentioned above.

Furthermore, in this kind of operation, it is also important to avoid any needlestick injury due to the exposed needle, whether this be before or after injection. It* is also important after use of the injection device to be able to ensure that the syringe cannot be used again.

In addition, to limit the apprehension felt by the patient, particularly in the case of injections administered by the patient himself, it is desirable for the injection device not to look like a conventional syringe and/or for the needle not to be visible or to be visible only a little prior to insertion.

Finally, injecting a product using traditional injection devices generally entails at least two manual steps. For example, in the case of syringes, one manual step is to hold the body of the syringe in order to insert the needle into the injection site, another step consists in pressing on the piston rod in order to administer the injection, the progression from one step to the other generally entailing moving the fingers with respect to the syringe. There therefore remains a need for an injection assistance device and for an injection set which are made safe, that is to say which make it possible to limit the impact of undesired movements of the patient and/or of the user in order to prevent a variation in the depth to which the needle is inserted when administering the injection so as to avoid unintentionally injecting the said product at an inadequate depth, limiting the risk of needlestick injury both to the patient and to the person administering the injection, preventing the re-use of the injection device after the injection completion, limiting the apprehension felt by the patient and making the giving of the injection easier.

There also remains a need for such an injection. assistance device and an injection set that allow the user to be certain of causing the needle to penetrate the injection site to a predetermined insertion depth before starting the injection in order to avoid unintentionally injecting the said product at an inadequate depth or even before insertion.

The present invention remedies these needs by proposing an injection assistance device for an injection device for injecting a product into an injection site, this injection device comprising at least one hollow body intended to receive a product that is to be injected, at least one hollow injection needle intended to penetrate the injection site, and at least one piston plunger housed in the said body, the said body and the said piston plunger being able to be moved in axial translation one with respect to the other, characterized in that the said injection assistance device comprises at least: a hollow sleeve provided with at least one bearing surface intended to come into contact with the surface of the said injection site, the said sleeve being intended to receive, at least in part, the said body and being arranged in such a way as to allow its axial mobility between at least a first position known as the initial position in which the said needle is not exposed over its insertion length, and a second position known as the insertion position in which the said needle is exposed by a predetermined insertion length L, a sleeve tube able to move with respect to the said sleeve and comprising at least one region for holding intended to be grasped by the user' s hand in order to urge the said sleeve tube axially towards the said injection site, the said sleeve tube also comprising coupling means intended to connect the said region for holding to the said piston plunger or to the said body at least in terms of axial translation, at least from the said initial position to the said insertion position so as to allow at least the said insertion with just one hand and in just one unidirectional axial movement, - at least one first elastically deformable element intended to bear between the said sleeve and the said body or the said sleeve tube so as to urge the said body or the said sleeve with respect to the said sleeve tube from the said injection position to the said protection position once the said axial force on the said sleeve tube has been released and without additional manual intervention on the part of the user,

- said coupling means being intended to remain linked to the said piston plunger once the said insertion position has been reached,

- said injection assistance device further comprising automatic-injection means arranged in such a way as to cause an additional axial movement in the distal direction of the said coupling means from the said insertion position to an injection position, this movement being intended to move the said piston thus administering the injection, the said injection assistance device thus allowing insertion and injection to be performed with just one hand and in just one uni- directional axial movement .

As a preference, the said sleeve is arranged in such a way as to allow axial mobility of the said body at least between an injection position and a position known as the final protection position in which the said needle is covered by the said sleeve.

As a preference, the said sleeve tube is arranged in such a way as to allow axial mobility of the said sleeve at least between the said insertion position and a position known as the final protection position in which the said sleeve covers the said needle.

As a preference, the device according to the invention comprises locking means arranged in such a way as to at, least limit the translational movement of the said sleeve or of the said body with respect to the said sleeve tube once the said protection position has been reached.

Advantageously, the said sleeve tube is designed to prolong the movement of the said piston from the said insertion position to an end-of-injection position, the said coupling means being arranged in such a way as to remain coupled to the said piston at least in the distal direction during this axial movement.

As a preference, the injection assistance device according to the invention comprises retaining means arranged in such a way as to at least attempt to keep the said sleeve tube in the said initial position, and to release the said sleeve tube when the said axial force exerted on it reaches a predetermined value.

In another embodiment of the invention, the said retaining means comprise at least frangible bridges connecting the said sleeve and the said sleeve tube and arranged in such a way as to yield and release the said sleeve tube when the said predetermined value of the force is reached.

In yet another embodiment of the invention, the said retaining means comprise at least one stop arranged between the said sleeve and the said sleeve tube or between the said sleeve tube and the said body and at least a second elastically deformable element intended respectively to urge the said sleeve, sleeve tube and body so as to keep them in abutment one with respect to the other.

Advantageously, the said retaining means comprise at least one peg housed in a cam, the said peg and the said cam being secured one of them to the said sleeve and the other to the said sleeve tube, at least one of the said peg and cam being able to move with respect to the other and urged by at least a third elastically deformable element.

The injection assistance device according to the invention may comprise at least one intermediate ring intended to be attached to the said body in such a way as to be blocked in terms of translation with respect to the said body at least in the proximal direction. As a preference, the said intermediate ring is intended to act as a bearing surface for at least one of the said first, second, third elastically deformable elements.

In one embodiment of the invention, the said sleeve tube defines a longitudinal skirt of which the distal part covers the proximal part of the said sleeve, at least in the insertion position.

Alternatively, the said sleeve defines a discontinuous longitudinal skirt in the proximal part of which the distal part of the said sleeve tube becomes inserted, at least in the insertion position, the solid parts of the said skirt then partially covering the said sleeve tube and the open parts allowing the said sleeve tube, and therefore the said injection set to be held.

In a preferred embodiment of the invention, the injection assistance device comprises control means arranged in such a way as to delimit the said insertion position of the said body.

As a preference, the said control means comprise at least one axial stop provided in the said sleeve and intended to have bearing against it at least one of the elements chosen from the group comprising the said body, the said sleeve tube, one of the said first, second, third elastically deformable elements.

As a preference, the said sleeve tube is arranged in such a way as to move distally until it comes into contact with the injection site in such a way as to delimit the said control means .

In another embodiment of the invention, the said sleeve and the said sleeve tube comprise shapes arranged in such a way as to be arranged, in the protection position, facing one another, prevent the said sleeve tube from returning to the said injection position and at least partly define the said locking means.

Advantageously, at least one of the said first, second or third elastically deformable elements is arranged in such a way as to cause the said sleeve to rotate with respect to the said sleeve tube as it returns to the relaxed state and to position the said shapes facing one another after this rotation.

As a preference, the said sleeve or the said sleeve tube comprises a flexible tab arranged in such a way as to be flexed, the said flexible tab bearing respectively on the said sleeve tube or on the said sleeve before the said protection position, the said — o — flexible tab also being arranged in such a way as to straighten out when the said protection position is reached so as to define a stop at least partly forming the said locking means.

Advantageously, at least one of the said first, second or third elastically deformable elements is chosen from the group comprising a helical spring, a leaf spring, an element made of an elastically deformable material, a more or less sealed gas chamber.

Advantageously, the said sleeve tube comprises secondary-coupling means intended to link the said region for holding to the said body at least in terms of axial translation so as to allow it to be kept in the said insertion position, at least a fourth elastically deformable element arranged between the said sleeve tube and the said coupling means and kept in the compressed state during the said insertion phase. As a preference, the said secondary-coupling means are arranged in such a way as to form a retractable axial stop for the said fourth elastically deformable element and/or for the said coupling means, the said stop being arranged in such a way as to collaborate with the said sleeve, in the said insertion position, in order to retract and release the said fourth elastically deformable element and/or the said coupling means respectively and allow the said piston to move from the said insertion position to the said injection position, the said secondary-coupling means, the said fourth elastically deformable element and the said sleeve at least partly forming the said automatic- injection means.

In another embodiment, the said sleeve tube is arranged in such a way as to form a retractable axial stop for the said fourth elastically deformable element and/or for the said coupling means, the said stop being arranged in such a way as to collaborate with the said sleeve, in the said insertion position, so as to retract and release the said fourth elastically deformable element and/or the said coupling means respectively, to allow the said piston to move from the said insertion position to the said injection position, the said secondary-coupling means, the said fourth elastically deformable element and the said sleeve at least partly forming the said automatic-injection means .

In a preferred embodiment of the invention, in said insertion and injection positions, said first elastically deformable element is arranged to be in a partially expanded state to still urge the said body distally toward the injection site, said sleeve and sleeve tube being separated by a gap allowing distal1 displacement of said body.

The present invention also solves the aforementioned needs by proposing an injection set for injecting a product into an injection site, this injection set comprising at least:

- an injection device as hereinabove comprising at least : - a hollow body intended to receive a product that is to be injected, the said body being equipped with at least one region for holding and with a hollow injection needle intended, during a first phase known as the insertion phase, to penetrate an injection site and, during a second phase known as the injection phase, to channel the said product from the said body towards the said injection site, at least one piston plunger housed in a more or less sealed fashion in the said body and intended to be moved in the distal direction by movement means in the said injection phase during which it drives the said product through the said needle, characterized in that it comprises at least one injection assistance device as described hereinabove in the sleeve of which the said body is placed and the sleeve tube of which is linked at least in terms of axial translation to the said piston plunger or to the said body at least from the said initial position to the said insertion position.

As a preference, the said region for holding comprises a flange.

Advantageously, the injection set is in the form of a kit that can be assembled prior to use.

As a preference, the force to overcome the stiction of the said piston plunger in the said body is designed to be greater than the resultant of the force of compression of the said elastically deformable elements and the force to cause the said needle to penetrate the said injection site.

In one embodiment of the invention, the said piston is coupled to a piston rod arranged in such a way as to form the said sleeve tube.

Other advantages and alternative forms of the present invention will now be specified with the aid of the description which will follow and of the attached drawings in which:

- Figure 1 is an exploded perspective view of an injection set according to the invention,

Figures 2 to 5 are sectioned views of the injection set of Figure 1 in the following respective positions: initial, needle insertion, end-of-injection and final protection,

Figures 6 to 9 are sectioned views of an alternative form of embodiment of the injection set according to the invention depicted respectively in the following positions: initial, needle insertion, end-of-injection, and final protection,

Figure 10 is a detailed exterior view of the means of locking the inj ection set of Figures 6 to 9 in the final protection position,

To make the invention easier to understand, the injection assistance device is described assembled with an injection device with which it forms an injection set.

Reference is made to figures 1 to 5 which depict an. injection set 100 according to the invention comprising an injection assistance device 101 for an injection device 3 comprising a body 2, a piston rod 146, a sleeve 104 and a sleeve tube 106. The sleeve tube 106 defines a longitudinal skirt 150 of which the distal part, in the insertion position as shown in Figure 3, covers the proximal part of the sleeve 104. The body 2 is intended to receive the product 25 that is to be injected. In the example depicted, this body 2 is equipped at its proximal end with a flange 10. In an alternative form of the invention, not depicted, this flange could be attached to the body 2. In these figures, the body 2 is equipped at its distal end with a hollow injection needle 7 intended to penetrate the injection site 27 to a predetermined insertion depth L.

In Figure 1, the piston rod 146 comprises a piston rod head which is extended in the distal direction by a longitudinal skirt 148 extending in the distal direction. The piston rod 146 is able to move with respect to the body 2 and is intended to be urged by an axial pressure in the distal direction in order to perform the injection. As is apparent from Figures 2 to 5, the sleeve 104 houses the body 2 and is able to move with respect to this body 2 between an insertion position (Figures 3 and 4) in which the needle 7 is exposed and a final protection position in which the sleeve 104 entirely covers the needle 7 (see Figure 5) .

In Figure 1, the injection assistance device 101 further comprises a first spring 110 arranged between the body 2 and the said sleeve 104, and a second spring 111 arranged between the longitudinal skirt 148 of the said piston rod 146 and the sleeve tube 106.

In the example depicted, the distal end of the longitudinal skirt 148 of the said piston rod 146 is eguipped with an exterior radial rim 112. This rim 112 may be in the form of a continuous or discontinuous annular bulge. The sleeve 104 comprises a radial stop 113 situated on its internal wall, as can be seen in Figure 13. This radial stop 113 may be in the form of a continuous or discontinuous annular bulge. The sleeve 104 at its distal end comprises an external radial step 114. This step 114 may be in the form of a continuous or discontinuous annular bulge. The proximal end of the sleeve 104 is equipped with an internal ramp 120. The distal end of the sleeve 104 is equipped with a bearing surface 105 designed to be placed in contact with the injection site 27. The sleeve 104 comprises, between its radial stop 113 and its bearing surface 105 an intermediate radial stop 109.

Still in the example depicted in Figures 1 to 5, the sleeve tube 106 is equipped at its distal end with an internal radial tooth 115. This internal tooth 115 may be in the form of a continuous or discontinuous annular bulge. The sleeve tube 106 comprises a region for holding 108, on which the user exerts force in order to carry out the injection operation as will be seen later on .

The injection assistance device 101 of Figure 1 further comprises an intermediate ring 116 attached to the flange 10, the said intermediate ring 116 being continued in the distal direction by a tubular part 117 the distal end of which is provided with at least one external radial projection 118. This radial projection 118 comprises an inclined distal face 119.

The body 2 contains the product 25 that is to be injected and is closed off, at its opposite end to the needle 7, by a piston plunger 26 connected to the piston rod 146.

The way in which the injection set 100 works will now be described with reference to Figures 2 to 5.

The injection set 100 is supplied at rest in the state depicted in Figure 2. In this pre-use initial position, the sleeve 104 completely covers the needle 7. Thus, the injection set 100 is safe, any needlestick injury- being avoided.

As can be seen in Figure 2, the distal end of the first spring 110 bears against the proximal face of the said radial stop 113 and its proximal end bears against the distal face of the said intermediate ring 116. As far as the second spring 111 is concerned, its distal end bears against the proximal face of the radial rim 112 and its proximal end bears against the internal wall of the region for holding 108.

In Figure 2, the first spring 110 can in the relaxed state or in a partially compressed state and the second spring 111 is in a partially compressed state. Thus, the sleeve 104 is retained, in terms of proximal translation with respect to the body 2, by the respective thrusts of the first and of the second spring 110, 111 and by, on the one hand, the distal face of the radial rim 112 bearing against the proximal face of the radial projection 118 and, on the other hand by the proximal face of the radial tooth 115 bearing against the distal face of the external radial step 114. In addition, the sleeve 104 is retained, in terms of distal translation with respect to the body 2, by the abutment of its intermediate radial stop 109 against the internal radial tooth 115 of the sleeve tube 106.

In order to perform the injection, the user grasps hold of the injection assistance device 101 and places the bearing surface 105 of the sleeve 104, at right angles onto the surface of the injection site 27, as shown in Figure 3.

Once the injection assistance device 101 is positioned in the desired location for the injection, the user exerts axial force in the distal direction on the region for holding 108 of the sleeve tube 106 in order to proceed with the phase of inserting the needle 7 into the injection site 27.

The sleeve tube 106 which is in direct contact with the piston rod 146 will push it in the distal direction without any absorption of the force applied by any deformable means. As the force to overcome the stiction of the piston plunger 26 of the piston rod 146 is greater than the force of compression of the first spring 110 combined with the force to overcome the friction of the penetration of the needle 7 in the injection site 27, the body 2 and piston rod 146 assembly moves in the proximal direction under the action of the axial force, without the piston plunger

26 being moved within the body 2, as shown in Figure 3. This movement causes the first spring 110 to become compressed. The needle 7 penetrates the injection site

27 until the inclined distal face 119 comes into abutment against the internal ramp 120.

Thus, the needle 7 has penetrated the injection site 27 to a perfectly defined insertion depth L as can be seen in Figure 3. By virtue of the inclined distal face 119 coming into abutment against the internal ramp 120, it is then no longer possible to cause the needle 7 to penetrate any further into the injection site 27. The insertion depth L is thus perfectly controlled. The insertion depth L can be adjusted by using an intermediate ring 116 of a predetermined specific thickness .

Moreover, during this insertion step, the coupling means, that is to say the piston rod 146, are mechanically rigid between the sleeve tube 6 and the body 2. In this insertion step, there is therefore no way to start moving distally the piston rod 146 related to the barrel 2, therefore, no risk to start the injection before reaching the right insertion depth. The injection assistance device 101 of figures 1 to 5 therefore ensures a two step use, with a first step for the insertion, and a second step for the injection. Under the effect of an additional axial force on the region for holding 108 of the sleeve tube 106, the internal ramp 120 of the proximal end of the sleeve 140 presses against the inclined distal face 119 of the projection 118 and causes the third projection 118 to flex inwards, thus disengaging the projection 118 from the rim 112. This disengagement releases the second spring 111 which, in returning to its relaxed state, drives the piston rod 146 in the distal direction, the said piston rod 146 then automatically administering the injection by driving the piston plunger 26 which, in turn, expels the product 25 towards the needle 7, as shown in Figure 4.

The device of figures 1 to 5 therefore ensures a two step use, with a first step for the insertion, and a second step for the injection. In an embodiment, not depicted, of the invention, the second spring 111 is kept in the compressed state by a button situated on the exterior wall of the sleeve tube 106, the said button being able to deflect and to release the second spring 111 under the effect of pressure by the user on the said button.

At the end of injection, as shown in Figure 4, the injection depth of the needle 7 has not varied, the piston plunger 26 is at the end of its travel in the body 2 and the first spring 110 is still in the compressed state.

In this insertion position the first spring 110 is in a compressed state. Therefore, if by inadvertence, the user slightly move the injection assistance device 101 away from the injection site 27, the injection device 3 will stay pressed against the injection site 27, preventing the insertion depth L to vary.

To finish off the operation and make the injection assistance device 101 safe, the user then releases the force on the region for holding 108 of the sleeve tube 106 and withdraws the injection assistance device 101 from the injection site 27. As the pressure previously applied on the first spring 110 is suppressed, the first spring 110 automatically expands to return to its initial relaxed state as depicted in Figure 5, thereby causing the deployment of the sleeve 104, which covers the needle 7. In this final protection position, the sleeve 104 is pressed against the sleeve tube 106 with the intermediate radial stop 109 of the sleeve 104 abutting against the internal radial tooth 115 of the sleeve tube 106.

During the deployment of the sleeve 104, a raised inclined plane (not depicted) situated on the wall of the longitudinal skirt 150 of the said sleeve tube 106 has collaborated with an inclined cam (not depicted) of the sleeve 104 to cause the sleeve 104 to turn with respect to the said sleeve tube 106, and the bringing of the said inclined plane into engagement in the said inclined cam prevents any translational movement of the 5 said sleeve 104 with respect to the said sleeve tube 106.

Thus, in the final protection state depicted in Figure 5, the injection set 100 is perfectly safe and lϋ can be discarded by the user without the risk of needlestick injury.

Another embodiment of the invention will now be described with reference to Figures 6 to 10.

15

References identical to Figures 1 to 5 have been maintained. The injection set 100 of Figure 6 comprises a hollow body 2, a piston rod 146, a sleeve 104 and a sleeve tube 106. The sleeve tube 106 defines a

20 longitudinal skirt 150 of which the distal part, in the insertion position as depicted in Figure 7, covers the proximal part of the sleeve 104. The injection set 100 also comprises an intermediate tubular component 136 and a spring 139.

25

The head of the piston rod 146 is extended in the distal direction by a longitudinal skirt 148 the distal end of which is equipped with an external radial rim 112. The sleeve 104 comprises, formed in its wall, at

30 least one longitudinal tab 127 extending in the proximal direction and able to deflect tangentially, the said tab 127 being equipped at its proximal end with an external radial peg 128, as shown in Figure 10.

35 The sleeve tube 106 is in the form of two concentric cylindrical sheaths, an internal sheath 129 and an external sheath 130, joined together at their proximal ends by a transverse wall in the form of a circular band, this transverse wall together with the external sheath 130 constituting the region for holding 108 of the sleeve tube 106. The internal sheath 129 is attached to the flange 10 and housed inside the longitudinal skirt 148 of the piston rod 146. At its distal end it comprises an external radial tooth 142, the utility of which will be explained later on.

The external sheath 130 houses the sleeve 104 and comprises, in its distal part, an inclined cam 132 formed on the wall of the said external sheath 130, the said cam 132 comprising a distal end 133 and a proximal end 134 and is able to collaborate with the peg 128 of the said tab 127, as shown in Figure 10.

The external sheath 130 further comprises, situated on its internal wall and proximally with respect to the cam 132, a radial projection 135. The radial projection 135 comprises an inclined distal face 140, the utility of which will be explained later on.

The intermediate tubular component 136 is arranged between the longitudinal skirt 148 of the said piston rod 146 and the external sheath 130, the said intermediate tubular component 136 comprising at its proximal end an internal radial step 137, the said tubular component 136 further comprising a notch 138 formed on its external wall.

The spring 139 is arranged between the longitudinal skirt 148 of the said piston rod 146 and the external sheath 130. The distal end of the said spring 139 bearing against the proximal face of the internal radial step 137, the proximal end of the said spring

139 bearing against the distal face of the said transverse wall of the region for holding 108 in the form of a circular band.

The injection assistance device 101 is supplied in the state depicted in Figure 6. In this initial position, the spring 139 is in the compressed state and with the said radial projection 135 engaged in the said notch 138, the retaining means are formed of the thrust of the said spring 139 and the said radial step 137 coining to bear against the said radial rim 112 on the one hand, and the said peg 128 coming to bear against the distal end 133 of the said cam 132, on the other.

In order to proceed with the insertion and injection operations, the user grasps hold of the injection assistance device 101 and places the bearing surface 105 of the sleeve 104 at right angles onto the surface of the injection site 27, as shown in Figure 6.

Once the injection assistance device 101 is positioned at the desired location for the insertion, the user exerts an axial force in the distal direction on the region for holding 108 of the sleeve tube 106 in order to proceed with the phase of inserting the needle 7 into the injection site 27.

The sleeve tube 106 which is in direct contact with the piston rod 146 will push it in the distal direction without any absorption of the force applied by any deformable means.

As the force needed to overcome the stiction of the piston plunger 26 of the piston rod 146 is greater than the force of compression of the spring 139 combined with the force to overcome the friction of the penetration of the needle 7 into the injection site 27, the body 2, piston rod 146 and sleeve tube 106 assembly moves in the proximal direction under the action of the axial force, without the piston plunger 26 moving within the body 2, as shown in Figure 7. The needle 7 penetrates the injection site 27 until on the one hand the said inclined distal face 140 comes into abutment against the said external ramp 141 and, on the other hand, the said peg 128 comes into abutment against the proximal end 134 of the said cam 132, the said tab 127 being in the unflexed state.

Thus the needle 7 has penetrated the injection site 27 to a perfectly defined insertion depth L as can be seen from Figure 7. It is then no longer possible to cause the needle 7 to penetrate any further into the injection site 27. The insertion depth L is thus perfectly controlled. In this example, the insertion depth L is directly linked with the dimension between the internal sheath 129 holding the flange 10 and the bearing surface 105 and/or of the intermediate tubular component 136, the cam 132. In an embodiment not depicted, the size of the sleeve tube 106 can be adjustable to allow adjustment of the insertion depth L.

Moreover, during this insertion step, the coupling means, that is to say the piston rod 146, are mechanically rigid between the sleeve tube 6 and the body 2. In this insertion step, there is therefore no way to start moving distally the piston rod 146 related to the barrel 2, therefore, no risk to start the injection before reaching the right insertion step. The injection assistance device 101 of figures 6 to 10 therefore ensures a two step use, with a first step for the insertion, and a second step for the injection.

Under the effect of an additional axial force on the region for holding 108 of the sleeve tube 106, the external ramp 141 pushes the inclined distal face 140, the projection 135 unflexes radially outwards and disengages from the notch 138, releasing the spring 139 which deploys and carries with it the intermediate tubular component 136 and therefore the piston rod 146 which then administers the injection by driving the piston plunger 26. The piston plunger 26 expels the product 25 towards the needle 7 as shown in Figure 8. The injection is therefore administered automatically without additional manual intervention on the part of the user. At the end of injection, as shown in Figure 8, the piston 26 is at the end of its travel in the closed end of the body 2 and the depth of insertion of the needle 7 has not varied.

In this insertion and injection positions the first spring 110 is in a compressed state. Therefore, if by inadvertence, the user slightly move the injection assistance device 101 away from the injection site 27, the injection device 3 will stay pressed against the injection site 27, preventing the insertion depth L to vary.

To finish off the operation and make the injection set 100 safe, the user then releases the force on the region for holding 108 of the sleeve tube 106 and withdraws the injection set 100 from the injection site 27. The tab 127 is then no longer subjected to any pressure and returns to its unflexed state by elastic return, driving the sleeve 104 with it. Likewise, the spring 139 continues to deploy in order to reach its relaxed state, driving with it the said intermediate tubular component 136, the radial step 137 of the said intermediate tubular component 136 being able to unflex radially outwards under the action of the said spring 139 to disengage from the said radial rim 112 of the said piston rod 146.

At the end of deployment- of the spring 139, the proximal face of the radial step 137 of the intermediate tubular component 136 comes into abutment against the distal face of the external radial tooth 142 of the internal sheath 129 and the said intermediate component 136 is blocked in terms of translation with respect to the body 2.

Thus, in the final protection position depicted in Figure 9, the injection assisted device 100 is completely safe and can be discarded by the user without the risk of needlestick injury.

In other forms of embodiment, not depicted, the helical springs may be replaced by leaf springs, pieces of elastomer, sealed gas chambers inside which the gas can be pressurized and expanded in succession, or any other equivalent means .

The injection sets and the injection assistance devices according to the invention are particularly simple to use and are perfectly safe. The entire injection operation can easily be performed by a single unidirectional axial movement, with just one hand. Moreover, the device of the invention ensures a two step use, with a first step for the insertion, and a second step for the injection. There is therefore no way to start the injection before reaching the right insertion step. The devices ensure a predetermined stable insertion depth during the injection step even despites slight movement of the user hand.

Claims

1. Injection assistance device (101) for an injection device (3) for injecting a product (25) into an injection site (27), this injection device (3) comprising at least one hollow body (2) intended to receive a product (25) that is to be injected, at least one hollow injection needle (7) intended to penetrate the injection site (27), and at least one piston plunger (26) housed in the said body (2), the said body
(2) and the said piston plunger (26) being able to be moved in axial translation one with respect to the other, characterized in that the said injection assistance device (101) comprises at least: a hollow sleeve (104) provided with at least one bearing surface (105) intended to come into contact with the surface of the said injection site (27) , the said sleeve (104) being intended to receive, at least in part, the said body (2) and being arranged in such a way as to allow its axial mobility between at least a first position known as the initial position in which the said needle (7) is not exposed over its insertion length, and a second position known as the insertion position in which the said needle (7) is exposed by a predetermined insertion length L, a sleeve tube (106) able to move with respect to the said sleeve (104) and comprising at least one region for holding (108) intended to be grasped by the user's hand in order to urge the said sleeve tube (106) axially towards the said injection site (27), the said sleeve tube (106) also comprising coupling means (111, 146) intended to connect the said region for holding (108) to the said piston plunger (26) or to the said body (2) at least in terms of axial translation, at least from the said initial position to the said insertion position so as to allow at least the said insertion with just one hand and in just one uni¬ directional axial movement, - at least one first elastically deformable element (110; 139) intended to bear between the said sleeve (104) and the said body (2) or the said sleeve tube (106) so as to urge the said body (2) or the said sleeve (104) with respect to the said sleeve tube (106) from the said injection position to the said protection position once the said axial force on the said sleeve tube (106) has been released and without additional manual intervention on the part of the user, - said coupling means (146) being intended to remain linked to the said piston plunger (26) once the said insertion position has been reached, said injection assistance device (101) further comprising automatic-injection means (111; 139) arranged in such a way as to cause an additional axial movement in the distal direction of the said coupling means (146) from the said insertion position to an injection position, this movement being intended to move the said piston (26) thus administering the injection, the said injection assistance device (101) thus allowing insertion and injection to be performed with just one hand and in just one uni-directional axial movement.
2. Injection assistance device (101) according to Claim 1, characterized in that the said sleeve (104) is arranged in such a way as to allow axial mobility of the said body (2) at least between an injection position and a position known as the final protection position in which the said needle (7) is covered by the said sleeve (104) .
3. Injection assistance device (101) according to Claim 1, characterized in that the said sleeve tube (106) is arranged in such a way as to allow the axial mobility of the said sleeve (104) at least between the said insertion position and a position known as the final protection position in which the said sleeve (104) covers the said needle (7) .
4. Injection assistance device (101) according to Claim 2 or 3, characterized in that it comprises locking means (137, 142) arranged in such a way as to . at least limit the translational movement of the said sleeve (104) or of the said body (2) with respect to the said sleeve tube (106) once the said protection position has been reached.
5. Injection assistance device (101) according to Claim 1, characterized in that the said sleeve tube
(106) is designed to prolong the movement of the said piston (26) from the said insertion position to an end- of-injection position, the said coupling means (146) being arranged in such a way as to remain coupled to the said piston (26) at least in the distal direction during this axial movement.
6. Injection assistance device (101) according to Claim 1, characterized in that it comprises retaining means (110, 112, 114, 117, 115, 118; 127, 128, 132, 133, 137) arranged in such a way as to at least attempt to keep the said sleeve tube (106) in the said initial position, and to release the said sleeve tube (106) when the said axial force exerted on it reaches a predetermined value.
7. Injection assistance device (101) according to Claim 6, characterized in that the said retaining means comprise at least frangible bridges connecting the said sleeve (104) and the said sleeve tube (106) and arranged in such a way as to yield and release the said sleeve tube (106) when the said predetermined value of the force is reached.
8. Injection assistance device (101) according to Claim 6, characterized in that the said retaining means comprise at least one stop (110; 127) arranged between the said sleeve (104) and the said sleeve tube (106) or between the said sleeve tube (106) and the said body (2) and at least a second elastically deformable element (110, 127) intended respectively to urge the said sleeve (104), sleeve tube (106) and body (2) so as to keep them in abutment one with respect to the other.
9. Injection assistance device (101) according to
Claim 6, characterized in that the said retaining means comprise at least one peg housed in a cam, the said peg
(128) and the said cam (132) being secured one of them to the said sleeve (104) and the other to the said sleeve tube (106) , at least one of the said peg (128) and cam (132) being able to move with respect to the other and urged by at least a third elastically deformable element (127).
10. Injection assistance device (101) according to Claim 1, characterized in that it comprises at least one intermediate ring (116; 136) intended to be attached to the said body (2) in such a way as to be blocked in terms of translation with respect to the said body (2) at least in the proximal direction.
11. Injection assistance device (101) according to Claim 10, characterized in that the said intermediate ring (116; 136) is intended to act as a bearing surface for at least one of the said first, second, third elastically deformable elements (110; 127, 139) .
12. Injection assistance device (101) according to Claim 1, characterized in that the said sleeve tube
(106) defines a longitudinal skirt (150) of which the distal part covers the proximal part of the said sleeve (104), at least in the insertion position.
13. Injection assistance device (101) according to Claim 1, characterized in that the said sleeve (104) defines a discontinuous longitudinal skirt in the proximal part of which the distal part of the said sleeve tube (106) becomes inserted, at least in the insertion position, the solid parts of the said skirt then partially covering the said sleeve tube (106) and the open parts allowing the said sleeve tube (106) to be held.
14. Injection assistance device (101) according to Claim 1, characterized in that it comprises control means (118, 119, 120; 135, 140, 141) arranged in such a way as to delimit the said insertion position of the said body (2) .
15. Injection assistance device (101) according to Claim 14, characterized in that the said control means comprise at least one axial stop (120; 141) provided in the said sleeve (104) and intended to have bearing against it at least one of the elements chosen from the group comprising the said body (2), the said sleeve tube (106), one of the said first, second and third elastically deformable elements (110; 127, 139).
16. Injection assistance device (101) according to Claim 14, characterized in that the said sleeve tube (106) is arranged in such a way as to move distally until it comes into contact with the injection site (27) in such a way as to delimit the said control means .
17. Injection assistance device (101) according to Claim 4, characterized in that the said sleeve (104) and the said sleeve tube (106) comprise shapes (137, 142) arranged in such a way as to be arranged, in the protection position, facing one another, prevent the said sleeve tube (106) from returning to the said injection position and at least partly define the said locking means.
18. Injection assistance device (101) according to one of the preceding claims, characterized in that at least one of the said first, second or third elastically deformable elements is arranged in such a way as to cause the said sleeve (104) to rotate with respect to the said sleeve tube (106) as it returns to the relaxed state and to position the said shapes facing one another after this rotation.
19. Injection assistance device (101) according to Claim 4, characterized in that the said sleeve (104) or the said sleeve tube (106) comprises a flexible tab arranged in such a way as to be flexed, the said flexible tab bearing respectively on the said sleeve tube (106) or on the said sleeve (104) before the said protection position, the said flexible tab also being arranged in such a way as to straighten out when the said protection position is reached so as to define a stop at least partly forming the said locking means.
20. Injection assistance device (101) according to one of the preceding claims, characterized in that at least one of the said first, second or third elastically deformable elements is chosen from the group comprising a helical spring, a leaf spring, an element made of an elastically deformable material, a more or less sealed gas chamber.
21. Injection assistance device (101) according to Claim 1, characterized in that the said sleeve tube (106) comprises secondary-coupling means (118; 135, 136) intended to link the said region for holding (108) to the said body (2) at least in terms of axial translation so as to allow it to be kept in the said insertion position, at least a fourth elastically deformable element (111; 139) arranged between the said sleeve tube (106) and the said coupling means (146) and kept in the compressed state during the said insertion phase.
22. Injection assistance device (101) according to Claim 21, characterized in that the said secondary- coupling means are arranged in such a way as to form a retractable axial stop (118) for the said fourth elastically deformable element and/or for the said coupling means (146), the said stop being arranged in such a way as to collaborate with the said sleeve (104), in the said insertion position, in order to retract and release the said fourth elastically deformable element (111) and/or the said coupling means (146) respectively and allow the said piston (26) to move from the said insertion position to the said injection position, the said secondary-coupling means, the said fourth elastically deformable element (111) and the said sleeve (104) at least partly forming the said automatic-injection means.
23. Injection assistance device (101) according to Claim 21, characterized in that the said sleeve tube (106) is arranged in such a way as to form a retractable axial stop (135) for the said fourth elastically deformable element and/or for the said coupling means (146), the said stop (135) being arranged in such a way as to collaborate with the said sleeve (104), in the said insertion position, so as to retract and release the said fourth elastically deformable element and/or the said coupling means (146) respectively, to allow the said piston (26) to move from the said insertion position to the said injection position, the said secondary-coupling means (135, 136), the said fourth elastically deformable element (139) and the said sleeve (104) at least partly forming the said automatic-injection means.
24. Injection assistance device (101) according to Claim 1, characterized in that, in said insertion and injection positions, said first elastically deformable element (110; 139) is arranged to be in a partially expanded state to still urge the said body (2) distally toward the injection site (27), said sleeve (104) and sleeve tube (106) being separated by a gap allowing distal displacement of said body (2) .
25. Injection set (100) for injecting a product (25) into an injection site (27), the said injection set (100) comprising at least: an injection device (3) comprising at least: a hollow body (2) intended to receive a product
(25) that is to be injected, the said body (2) being equipped with at least one region for holding (10) and with a hollow injection needle
(7) intended, during a first phase known as the insertion phase, to penetrate an injection site
(27) and, during a second phase known as the injection phase, to channel the said product (25) from the said body (2) towards the said injection site (27) , at least one piston plunger (26) housed in a more or less sealed fashion in the said body (2) and intended to be moved in the distal direction by movement means in the said injection phase during which it drives the said product (25) through the said needle (7), characterized in that it comprises at least one injection assistance device (101) according at least to Claim 1, in the sleeve (104) of which the said body (2) is placed and the sleeve tube (106) of which is linked at least in terms of axial translation to the said piston plunger (26) or to the said body (2) at least from the said initial position to the said insertion position.
26. Injection set (100) according to Claim 25, characterized in that the said region for holding comprises a flange (10) .
27. Injection set (100) according to Claim 25, characterized in that it is in the form of a kit that can be assembled prior to use.
28. Injection set (100) according to Claim 25, characterized in that the force to overcome the stiction of the said piston plunger (26) in the said body (2) is designed to be greater than the resultant of the force of compression of the said elastically deformable elements (110, 111; 139) and the force to cause the said needle (7) to penetrate the said injection site (27).
29. Injection set (100) according to Claim 25, characterized in that the said piston plunger (26) is coupled to a piston rod (146) arranged in such a way as to form the said sleeve tube (106) .
PCT/IB2006/001354 2005-04-20 2006-04-14 Injection set and injection assistance device WO2006111861A3 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR05.03964 2005-04-20
FR0503964A FR2884722A1 (en) 2005-04-20 2005-04-20 Injection assembly and support device
PCT/IB2006/001354 WO2006111861A3 (en) 2005-04-20 2006-04-14 Injection set and injection assistance device

Applications Claiming Priority (1)

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PCT/IB2006/001333 WO2006111859A1 (en) 2005-04-20 2006-04-14 Injection set and injection assistance device
PCT/IB2006/001351 WO2006111860A1 (en) 2005-04-20 2006-04-18 Injection set and injection assistance device

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1904127A1 (en) * 2005-06-03 2008-04-02 Innovacell Biotechnologie Gmbh Injection appliance and method
WO2012093071A1 (en) * 2011-01-04 2012-07-12 Sanofi-Aventis Deutschland Gmbh A safety device for a pre-filled syringe and an injection device
EP2572741A1 (en) * 2011-09-23 2013-03-27 Sanofi-Aventis Deutschland GmbH Medicament delivery device and actuation mechanism for a drug delivery device
WO2015063507A1 (en) * 2013-11-01 2015-05-07 Consort Medical Plc Medicament delivery device sub-assembly
JPWO2013146050A1 (en) * 2012-03-30 2015-12-10 テルモ株式会社 Liquid dosage instrument
US9616174B2 (en) 2012-05-25 2017-04-11 Aptar France Sas Autoinjector
US9694138B2 (en) 2010-07-02 2017-07-04 Sanofi-Anetis Deutschland GMBH Safety device for a pre-filled syringe, injection device and injection kit
US9707357B2 (en) 2012-05-25 2017-07-18 Aptar France Sas Autoinjector

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0618294D0 (en) * 2006-09-19 2006-10-25 Cambridge Biostability Ltd An injector
EP2129417A1 (en) * 2007-03-02 2009-12-09 Novo Nordisk A/S Medication delivery device with pre-set bolus pump
CN102083377B (en) * 2008-06-19 2014-07-23 雷文达尔·贝蒂 A device for locating epidural space while safeguarding against dural puncture through differential friction technique
FR2934165B1 (en) * 2008-07-28 2010-08-20 Marc Brunel Injection device Secure single use
JP5788879B2 (en) 2009-08-27 2015-10-07 サノフィ−アベンティス・ドイチュラント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング Drug container
JP5886750B2 (en) * 2009-10-16 2016-03-16 ヤンセン バイオテツク,インコーポレーテツド Palm-operated drug delivery device
US9233213B2 (en) 2009-10-16 2016-01-12 Janssen Biotech, Inc. Palm activated drug delivery device
JP5905002B2 (en) * 2010-07-02 2016-04-20 サノフィ−アベンティス・ドイチュラント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング Safety device for pre-filled syringes and injection devices
US8911401B2 (en) 2010-07-02 2014-12-16 Sanofi-Aventis Deutschland Gmbh Safety device for a pre-filled syringe and injection device
EP2588167B1 (en) * 2010-07-02 2018-02-21 Sanofi-Aventis Deutschland GmbH Safety device for a pre-filled syringe and injection device
US9717851B2 (en) 2012-05-25 2017-08-01 Aptar France Sas Autoinjector
FR2990862B1 (en) * 2012-05-25 2015-05-15 Valois Sas autoinjector
US9707343B2 (en) 2012-05-25 2017-07-18 Aptar France Sas Autoinjector comprising a time delay device having a planetary gear set for delaying the retraction of the needle
CN104768592B (en) 2012-09-27 2017-05-17 阿普塔尔法国简易股份公司 Automatic injector
FR3013601B1 (en) 2013-11-25 2017-08-11 Aptar France Sas Autoinjector.
JP2017514603A (en) * 2014-05-02 2017-06-08 ノボ・ノルデイスク・エー/エス For drug delivery devices, telescopic drive arrangement
FR3039069A1 (en) * 2015-07-24 2017-01-27 Nemera La Verpilliere An automatic liquid product injection comprising an injection spring.
FR3056915A1 (en) 2016-10-04 2018-04-06 Aptar France Sas Device for manual injection.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5176643A (en) * 1991-04-29 1993-01-05 George C. Kramer System and method for rapid vascular drug delivery
FR2770404A1 (en) * 1997-11-05 1999-05-07 Sedat automatic injector retraction to end injection needle
WO2004108194A1 (en) * 2003-06-05 2004-12-16 Owen Mumford Limited Syringe firing mechanism
WO2005009515A1 (en) * 2003-07-31 2005-02-03 Sid Technologies Llc Injecting apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2308217A1 (en) * 1997-10-22 1999-05-14 Elan Corporation, Plc An improved automatic syringe
US6102896A (en) * 1999-09-08 2000-08-15 Cambridge Biostability Limited Disposable injector device
US6808507B2 (en) * 2002-05-10 2004-10-26 Cambridge Biostability Ltd. Safety injectors
US20040039337A1 (en) * 2002-08-21 2004-02-26 Letzing Michael Alexander Portable safety auto-injector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5176643A (en) * 1991-04-29 1993-01-05 George C. Kramer System and method for rapid vascular drug delivery
FR2770404A1 (en) * 1997-11-05 1999-05-07 Sedat automatic injector retraction to end injection needle
WO2004108194A1 (en) * 2003-06-05 2004-12-16 Owen Mumford Limited Syringe firing mechanism
WO2005009515A1 (en) * 2003-07-31 2005-02-03 Sid Technologies Llc Injecting apparatus

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US8038648B2 (en) 2005-06-03 2011-10-18 Innovacell Biotechnologie Gmbh Injection device and method
EP1904127B1 (en) * 2005-06-03 2016-08-10 Innovacell Biotechnologie AG Injection appliance and method
EP1904127A1 (en) * 2005-06-03 2008-04-02 Innovacell Biotechnologie Gmbh Injection appliance and method
US9694138B2 (en) 2010-07-02 2017-07-04 Sanofi-Anetis Deutschland GMBH Safety device for a pre-filled syringe, injection device and injection kit
US9061106B2 (en) 2011-01-04 2015-06-23 Sanofi-Aventis Deutschland Gmbh Safety device for a pre-filled syringe and an injection device
WO2012093071A1 (en) * 2011-01-04 2012-07-12 Sanofi-Aventis Deutschland Gmbh A safety device for a pre-filled syringe and an injection device
CN103415314A (en) * 2011-01-04 2013-11-27 赛诺菲-安万特德国有限公司 A safety device for a pre-filled syringe and an injection device
JP2014503301A (en) * 2011-01-04 2014-02-13 サノフィ−アベンティス・ドイチュラント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング Safety device for the injection device and a pre-filled syringe
RU2578376C2 (en) * 2011-01-04 2016-03-27 Санофи-Авентис Дойчланд Гмбх Protective device for pre-filled syringe and injection device
EP2572741A1 (en) * 2011-09-23 2013-03-27 Sanofi-Aventis Deutschland GmbH Medicament delivery device and actuation mechanism for a drug delivery device
US9364617B2 (en) 2011-09-23 2016-06-14 Sanofi-Aventis Deutschland Gmbh Medicament delivery device and actuation mechanism for a drug delivery device
WO2013041642A1 (en) * 2011-09-23 2013-03-28 Sanofi-Aventis Deutschland Gmbh Medicament delivery device and actuation mechanism for a drug delivery device
JP2017196460A (en) * 2011-09-23 2017-11-02 サノフィ−アベンティス・ドイチュラント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング Medicament delivery device and actuation mechanism for medicament delivery device
EP3225268A1 (en) 2011-09-23 2017-10-04 Sanofi-Aventis Deutschland GmbH Medicament delivery device and actuation mechanism for a drug delivery device
JPWO2013146050A1 (en) * 2012-03-30 2015-12-10 テルモ株式会社 Liquid dosage instrument
US9707357B2 (en) 2012-05-25 2017-07-18 Aptar France Sas Autoinjector
US9662447B2 (en) 2012-05-25 2017-05-30 Aptar France Sas Autoinjector
US9789253B2 (en) 2012-05-25 2017-10-17 Aptar France Sas Autoinjector
US9616174B2 (en) 2012-05-25 2017-04-11 Aptar France Sas Autoinjector
WO2015063507A1 (en) * 2013-11-01 2015-05-07 Consort Medical Plc Medicament delivery device sub-assembly

Also Published As

Publication number Publication date Type
FR2884722A1 (en) 2006-10-27 application
WO2006111859A1 (en) 2006-10-26 application
WO2006111860A1 (en) 2006-10-26 application
WO2006111861A3 (en) 2007-02-22 application

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