FR3055551A1 - SECURED AND DISPOSABLE SELF-LOCKING RETRACTABLE NEEDLE SYRINGE - Google Patents

Abstract

Device for making a needle mounted on its support or cannula to make them integral with the piston at the end of injection and retractable by pulling on the piston. The pulling on the piston this one will be blocked by its lugs in the body of the syringe. It is constituted fig1 page 1/4, a body of one-piece syringe 7 in which is in its upper part inside a groove 4, a piston 3 with groove 8 in its lower part, a support of needle or cannula 2 of a needle 1 of a piston with fins 6 extended by pins 5, a protective cover needle 9. The device is mainly intended for medical use by health actors in the context of vaccination or laboratory, veterinary and other medical applications or pharmacologies. The device contributes to significantly reduce contamination and helps to stop viral vectors but also to protect practitioners in the medical act. The device covers all the capacities and dimensions of syringes.

Description

® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY © Publication number:

(to be used only for reproduction orders) (© National registration number

055 551

00955

COURBEVOIE © IntCI ⁸ : A 61 M 5/32 (2017.01)

PATENT INVENTION APPLICATION

A1

©) Date of filing: 15.06.16. © Applicant (s): FRETTE JACQUES— FR, FRETTE STEPHANE— FR, FRETTE YVETTE— FR and PAUL Priority : SANDRINE— FR. @ Inventor (s): FRETTE JACQUES, FRETTE YVETTE, FRETTE STEPHANE and PAUL, SANDRINE (43) Date of public availability of the NEE FRETTE. request: 09.03.18 Bulletin 18/10. (© List of documents cited in the report of preliminary research: Refer to end of present booklet (© References to other national documents ® Holder (s): FRETTE JACQUES, FRETTE STE- related: PHANE, FRETTE YVETTE, PAUL SANDRINE. ©) Extension request (s): Polynesia-Fr © Agent (s): FRETTE JACQUES.

FR 3 055 551 - A1

SECURE AND DISPOSABLE SELF-LOCKING RETRACTABLE NEEDLE SYRINGE.

(© Device to make a needle mounted on its support or cannula to make them integral with the piston at the end of injection and retractable by pulling on the piston. The fact of pulling on the piston this one will be blocked by its pins in the syringe body.

It consists of fig 1 page 1/4, of a monobloc syringe body 7 in which is located in its upper part inside a groove 4, a piston 3 with groove 8 in its lower part, a support d needle or cannula 2 of a needle 1 of a piston with fins 6 extended by lugs 5, a needle protection cover 9.

The device is mainly intended for medical use by health actors in the context of vaccination or actors in laboratories, veterinarians, and all other medical applications or pharmacologies.

The device in fact contributes to considerably reducing contamination and helps to stop viral vectors but also to protect practitioners in the medical process.

The device covers all the capacities and dimensions of syringes.

i

SECURE AND DISPOSABLE SELF-LOCKING RETRACTABLE NEEDLE SYRINGE

The present invention relates to a device for a safety syringe with a needle retractable by its self-locking piston, made of glass and or of disposable plastic, to render the syringe unusable after a first injection. This device is a secure medical syringe, whether intended for vaccines or medical care, laboratories, veterinarians and any other medical activity.

o The syringe with retractable needle by its self-locking plunger has a capacity depending on demand ranging from 0, lml (cc) to 60ml (cc) or more.

The syringe is intended for the injection of liquids into humans and animals.

The use of conventional syringes (called disposable) are often reused, which has the effect of transmitting pathogenic germs and thus poses the risk of contamination of serious diseases.

Some syringes have so-called safety or even self-locking elements for capacities of 0.3 to 0.5 ml but do not respond to the global problem, the elimination of the risks of reuse and or protection of the patient and the practitioner, moreover, the prices remain prohibitive. On the market, no syringe is presented with a self-locking needle, alone or by its self-locking plunger, which allows it to be reused today and in particular:

WO 2005072798, this invention relates to a medical device for administering a medicament to a patient, comprising a syringe whose plunger 24 defines a reservoir for the medicament, a needle cannula 26 coupled to a front end of the cylinder, and a piston with a stopper positioned in the cylinder which drives the medicine while moving. The medical device also includes a cap 22; disposed on the needle cannula on which it slides from a first position, in which the front point of the needle cannula is exposed, on a second position in which this same point is covered by the cap. An actuating mechanism connected to the cap comprises a constraint element, coupled to the cylinder and to the cap, which moves the latter to the second position. A trigger element keeps the actuator element liberal under load and liberally retains the cap in the first position. The actuator element can release the cap either by manual control or by interaction of the pusher.

But these different devices do not make the syringe reusable o, since by simple interaction of the plunger the needle is released, moreover neither the piston, nor the needle or cannula are self-locking.

FR 2750868, the invention relates to a medical syringe made of single-use plastic material which is non-reusable and very economical since it does not have a needle cap. The needle being housed inside the piston handle. There is no problem of miniaturization thanks to a realization of the neutralization device in a single size for all the models. A neutralizing device 1 with o U-shaped rods connecting the two parts of the handle is proposed.

The control suction device 2 is constituted by an elongated syringe tip centered by a sleeve 3 which i can be bonded through an ovular opening 4. Models of pre-filled syringes are described. One where the needle cap serves as a plunger handle. Others where the base of the needle constitutes the body of the syringe which is capped by a stopper which must be pushed by an independent handle, or by an elastic piece intended to be inflated by a conventional syringe whose manipulator has a single copy used for all o vaccinations.

But these different devices are very restrictive for the user and do not offer maximum security, no self-locking device. These devices are mainly intended for pre-filled and the implementation for hospital syringes is very dangerous.

EP1621222, a passive needle protection comprises a body having distal and proximal ends and a cavity intended to receive a cartridge of medicaments, and a notch sliding on the body between drawn and developed arrangements intended to expose and cover, respectively, a needle attached to the body, the screen being constrained in the developed position. Deviated pawl-like elements extend from the screen and include pawls which cooperate with pawls placed on the body to hold the screen in its retracted position, o A syringe is inserted in the needle guard, and the syringe needle inserted into the patient. The syringe plunger is pressed to inject the medication and to deflect the latch-type elements so that they disengage from the pawls and release the medication and to deflect the latch-type elements so that they disengage from the pawls and release the 'screen. The screen then automatically advances to the expanded position. In the developed position, cooperation elements on the screen and the body cooperate with each other, thus aiming at an undesirable withdrawal of the screen.

o But these assemblies are very difficult in industrial production and very expensive. In addition, they do not respond to all of the safety issues, since they require human intervention before and after injection, they also do not offer safety in use after a first injection because either the piston is not self-locking or the needle is not retractable. Furthermore, the various devices (a syringe in another syringe) require that the needle is already mounted on the syringe body, which has another drawback, since the syringes become specialized by the format and by the size of the needle). use.

FR2787718 and FR2787719, the invention fig. This concerns a disposable plastic and / or glass syringe which cannot be used for a second injection and by another person. It is intended for the injection of pharmaceutical solution and liquid in humans and animals, (medical and pharmaceutical use). Consisting of a piston body 2 fitted with fixed fins along its length 19 and retractable fins (7-7A) partially along the length, with a conical seal seat (18) with a seal (9), a groove for accommodating the half nuts (6-6A) during filling, a non-return ring (3-3A) piston which constrains a second use, a syringe body (4) with a recess d partial thickness over the length (8-8A) of a base (25) allowing the syringe body to be assembled with the needle which is found after insertion on seat B (10) of the syringe body, a needle protection cover (21).

However, the entire device is insufficient to have maximum security, especially for the operator. This is why it was necessary to integrate new technologies to meet security expectations while respecting industrial rules.

The device according to the invention overcomes these drawbacks.

The device in fact comprises, according to a first characteristic, a needle or hollow cannula support of variable diameter in glass or molded plastic, adapted according to gauges and lengths of needles. It has the particularity of being introduced into the base of a syringe body either from the outside of the syringe body or from the inside of the syringe body depending on the dimensions of the syringe. This support of variable length and diameter (depending on the size of the syringe) is integral with the piston when the latter is at the end of injection.

The device in fact comprises, according to a second characteristic, a hollow monobloc piston of molded glass or plastic of variable size and diameter produced in its lower part in the center and or offset from its axis so as to receive the upper part of the needle support or cannula at the end of injection. It also has on its facets an outgrowth of material called fin (s) extended by lugs (the number is not limited) which has the particularity when one pulls on the piston to be housed in the upper groove of the syringe body. The action of pulling on the plunger allows the needle to enter the body of the syringe and to secure it as much as possible. This allows on the one hand not to perform a second injection, and on the other hand to protect the operator after his injection.

The device indeed has a third characteristic, a one-piece syringe body made of molded glass or plastic of variable size and diameter, the upper part of which has a groove for accommodating the lugs of the fins of the piston after injection and thus avoiding an exit of the piston with its needle from the body of the syringe, the base is formed in its lower part of a groove to accommodate the needle or cannula support and lo hold it together during the injection, but also during the filling of the syringe.

According to particular embodiments:

- The needle or cannula support, a fully molded part, can be of variable length and diameter, have lugs

Additional L5 to provide better pullout strength compared to the size of the syringe.

The support or cannula being hollow at both ends and split on the upper end located in the body of the syringe, are internal diameter is a function of the diameter of: o the needle and its technical characteristics.

- The piston, a fully molded one-piece, can be of variable diameter and length. It is hollow in its lower part to allow the housing of the needle or cannula support in the groove provided for this purpose and to be integral with the latter.

It is also formed over the length of the extended fin (s) of lug to be held (s) in the upper groove of the body of the syringe.

- The syringe body, a fully molded one-piece piece, o can be of variable length and diameter. It is in its inner and lower base produced a groove to accommodate the needle or cannula support and provided sufficient support during filling and injection, but not binding to pull the needle or cannula support by the piston after injection.

It is also produced in its inner and upper part a groove to receive the lugs of the fins of the piston and thus prevent the piston from leaving the body of the syringe with the needle.

- The accompanying drawings illustrate the invention:

Figure 1 shows the assembly of the syringe mounted ready for use.

Figure 2 shows the body of the syringe.

Figure 3 shows the piston

FIG. 4 represents the support or cannula of the needle With reference to these drawings, this device comprises an assembly lo fig. 1 page 1/4 representing a syringe with needle mounted (1) on its support or cannula (2} retractable by its self-locking piston (3), a groove (4) to accommodate the pins (5) of the fins (6) of the piston (3), a syringe body (7), a seal (8) needle cover (9).

s This device comprises an assembly fig. 2 page 2/4 a syringe body (10), in its lower and inner part (11) a concave shape (12), in its lower and outer part (11) a cylindrical extension and conical (15), in its upper and inner part (13) a groove (14), in its upper and outer o part (13) a bearing surface (16).

This device comprises an assembly fig. 3 page 3/4 a syringe body (17), in its lower and inner part (18) a groove (19), in its lower and outer part (18) a groove (20), fins (21,), extended by lugs (22) at its upper and outer end (23), an outer surface (24), in its lower and outer part (18) an orifice (25), in its lower part and interior (18) a hole or void (26).

This device comprises a set fig. 4 page 4/4, a needle and or hollow cannula support (27), a convex shape (28), a conical shape (29), lugs (30), slots (31), a hollow passage (32), a groove (33)

By way of nonlimiting example, the entire body of the syringe will have a variable dimension to respond to a> filling of between 0.2 cc and 60 cc or even more.

This device according to the invention is particularly intended for health practitioners whatever the field.

This device contributes to better comfort in the use of syringes and also provides maximum safety for healthcare workers. In addition, this device responds to the safety and reuse issues of used syringes.

Device characterized by the action of blocking and securing, the piston 17 with the needle or cannula support 27 and its needle 1 (fig) after injection,

Device characterized in that the blocking and the joining of the piston 17 with the needle or cannula support 27 is achieved by the pins 30 of the needle or cannula support in the groove 19 of the piston 17.

Device characterized in that the support or cannula 27 with its needle 1 is mounted and stabilized in the concave part 12 of the syringe body 10.

Device characterized by the hollow piston 26, houses the pins 30 of the needle support in the groove 25 and thus becomes integral. Device characterized in that the body of the syringe 10 in its groove 14 houses the pins 22 of the piston 17 thus rendering the syringe unusable.

Claims (4)

1) Syringe comprising a syringe body (7) a needle (1) mounted on a support or cannula (2) and a self-locking piston s (3), characterized in that the piston (3) comprising pins (5) allowing after injecting a liquid, retract the needle (1) and the plunger (3) to make the syringe non-reusable and secure. 2) Syringe according to claim 1, characterized in that the needle or cannula support (2) comprises lugs (30) allowing the locking or securing of the needle or cannula support (2) in the groove (11) of the syringe body (10). 3) Syringe according to claim 2, characterized in that the lower body (11) of the syringe comprises a concave portion (12) allowing ia stabilization of the needle or cannula support (2) in the body of the syringe (10). 4) Syringe according to claim 3, characterized in that the body of the syringe (10) comprises a groove (14) where the piston (3) and the needle or cannula support (2) are blocked by the pins o (22 ) after pulling the piston, after injecting a liquid.