FR2788984A1 - Automatic and self-locking safety device for glass or plastic syringes has main component with cylinder and arms and secondary elements with springs - Google Patents

Abstract

A safety device, designed to fit standard glass and plastic syringes of 0.1-10 ml capacity, consists of a main component (1) with a cylinder and two arms (12, 12b) separated by curved recesses (11, 11b) that allow the syringe scale to be read off, and two secondary components (2, 2b) connected to the main one by molded springs (5, 5b) and locking together on either side of the plunger. During injection the cylinder presses against the patient's skin and covers the needle as it is withdrawn.

Description

DESCRIPTION

  The present invention relates to an automatic and self-locking safety device for a range of so-called standard syringes made of glass or plastic, ranging from 0.1 ml to 10 ml, and suitable for injections in

  dental, hospital, medical and private environments.

  Currently, so-called safety syringes do not have a simple automatic triggering device. In addition none of these systems can be adapted to standard syringes. A particular production is necessary The absence of generalization causes accidental contamination perfectly spotted, such: winter and hepatitis However, we can find in trade and in industry several processes going in the direction of safety. SO SANOFI SANTE establishments have made available to caregivers a SEMI - automatic system, maneuverable with both hands, even the firm BECTON DICKINSON has a similar system. Difficult to apply in emergencies.

  in this context that the risk is most important.

  In addition the number of pieces which constitute these processes brings the products to a cost price which prevents its distribution. However, these remarks on the existing techniques highlight on the one hand the reality of the market demand, because they act of 'leading companies in the sector and also the lack of a simple, fully automatic and self-locking system The present invention aims to overcome its drawbacks. IT has several objectives: In particular, the device achieves automatic security without changing the

user convenience.

  Its handling is done with one hand, this objective remains fundamental The device on the economic level does not significantly increase the cost of realization, nor the hospital budgets by its simple manufacture 30.11 allows in addition to the automatic security a blocking of the system in end of use, the device responds in this way to the risks of accidental contamination in SMUR and emergency (in this area the DDT identified 32 cases having caused HIV contamination in 98 in hospital environment) In terms of additional security The device n is never in contact with drug injection. which avoids side reactions The device goes in the direction of the recommendations of public health at the level of drug addiction THE device is easily moldable and manufacturable, it satisfies the standards in force of class II. It withstands NEGATIVE AND POSITIVE temperatures for the storage of serum and pharmacopoeial products. It withstands the storage periods imposed by the specifications of pharmacy laboratories, ie three years. The whole device is suitable in particular whenever traceability

  of a patient remains undefined or that the risk of contamination may exist.

  Thus the natural market is the samus, smurs, emergencies, treatments on patients at risk, dentistry, treatment with serum, pre-installed drugs, preparation for surgery, post operative

laboratories and the private sector.

  These objectives are achieved in accordance with the present invention while respecting the following characteristics: Said automatic security is formed of three parts - the first part according to a first characteristic is a rigid and transparent plastic envelope open at both ends which surrounds freely without rubbing the standard syringe body, which represents a

first novelty.

  - the second and third part, exactly symmetrical between them, are rigid arms which are joined by 2 axes to the first part, the envelope The device of the envelope has dimensions of diameter which adapt to the range of syringes, which represents a second novelty This envelope is connected by two arms having two axes with safety pins C equi represents a 3rd ieme novelties On these axes comes to be joined together two spring windings extending two pieces also in the form of arms, which represents a

another novelty.

  The two arm-shaped pieces have a clip device which snaps onto the proximal end of the syringe plunger and makes them

  in solidarity with the latter, which represents a 5th novelty.

  The device comprising the envelope is characterized by a notch which allows direct reading of the indications on the standard syringe body, which represents a 6th novelty

  The device has a notch on each base of the arms which allows those -

  to bend in the context of the practice of injection, which represents a

new innovation.

  The device is provided with two stops which aim at the final phase of I

  injection to block the system in a distal position.

  Throughout the description and claims I use the

  term "proximal and distal" are used taking as reference I operator who uses the syringe. THUS the proximal position is the most

  close to the operator and the most distant distal position.

  Thanks to these elements, when the user wants to practice an injection according to these provisions, he pushes on the proximal part of the piston of the syringe which causes to push at the same time the arms of the envelope and the parts clipped onto it. .. THE distal end of the envelope comes into contact with the skin to abut it. The constant pressure causing the injection on the proximal part of the piston obliges at the same time, the product to penetrate the patient but also on the axes to be released from the safety pins which trigger the system, forcing the rigid arms to bend towards I ' outside of the syringe while the springs contract under this effect. At the end of the injection, the arms stops come into engagement under the circular cheeks of the syringe body serving as housing for the middle and middle fingers during the injection. When the user decides to withdraw the needle from the arm, the two springs tend to want to bring the arms back into alignment with one another (, in their natural position). The stops having fixed the device under the cheeks of the syringe, thus blocking any proximal movement, it remains only for the device to develop towards the distal position and to cover with the envelope the needle of the syringe, exceeding 5mm. at this time the pins of the axis returned to their natural place come to rest on the axis and

block the system.

  Other characteristics and advantages will appear on reading the description

  detailed which will follow. This description will intervene according to the references

  appearing in the accompanying drawings.

  -Figure I shows the device mounted on a syringe in the injection position

  completed in accordance with the invention.

  - Figure 2 shows the part "said envelope in front view - Figure 3 shows a half view from below of the part 1, - Figure 4 shows a partial view from the right - Figure 5 shows a detail (D) of 1 axis 4 and 1 lug 14 -Figure 6 shows the mounting of the partial device of parts 2 and 2 b as well as a detail of the spring 5 and the axis 14 (in the injection position finished) -The figure 7 shows a front view of the piece 2 symmetrical to 2b - Figure 8 shows a left view of the piece 2 - Figure 9 shows a section AA in bottom view of the piece 2 which highlights

  value I stapling on the syringe plunger at its proximal part.

  FIG. 10 shows the axis 4 of the part with its lug 14 and the housing 18 in which the lug will be housed following slicing by the tooth 20 The device represented in FIG. 1 essentially comprises THE PIECE I, called the envelope, the piece 2 called right arm of

  device and part 2b called left arm of the same device.

  In accordance with the invention, the part I is made integral with the parts 2 and 2b by two axes 4 and 4 b belonging by molding to the part 1 according to FIG. -1 According to the device of the invention, the parts 2 and 2b are clipped onto the plunger of the standard syringe in the proximal position by staples 8 and 8b. figure 9 The device in place is triggered only if the punctures are carried out, which authorizes the operator to empty the unwanted air from the syringe body before injection The devices' activate as soon as the operator pricks and presses on the proximal part of the syringe plunger. by bringing part I of the envelope in contact with the patient's skin The axes 4 and 4 b which have two lugs 14 and 14 b respectively are intended to authorize the rotational movement

  and the contraction of the spring parts 5 and 5 b, according to FIG. 10.

  In accordance with FIG. 10 and the invention The teeth 20 and b when pressing cut the pins 14 and 14 b during the rotation of the axes 4 and 4 b, which are housed at 18 and 18b figure 10 The arms of the pieces 1, 2 and 2b or 12, 12b and 13 13b bend at the level of the notches 9,9b and 10, 1 Ob forming two external Vs digital on the piston when the arms 13, 13 b 12 and 12 b bend towards the outside, figure -1 According to the invention the arms 12 AND 12 b of the part I have an outside opening angle with respect to 1 axis of I envelope I of 6 o. this angle facilitates the folding of the arms 12 12b and in this movement causes the arms 13 and 13 b under the digital injection pressure, until the end of the latter, FIG. 2 At the end of the injection the stops 6 and 6 b pieces 2 and 2b get stuck under the cheek 28 of the syringe, in this way they prevent the return of the system, it is autoblocking and incapacity for a new use Once blocked the operator knowing the success of the injection by two means the envelope is designed in transparent rigid plastic and allows the reading - two ogival notches 1 i and I lb, Figure I, visualize the result According to the invention when the injection is finished the operator withdraws from the skin the needle, the envelope I pushed by the tension of the springs 5 and 5b on the arms 13 and 13 b tends to automatically resume its natural position according to FIG. I. Thus the envelope covers the part distal of the needle exceeding 5 mm About this The device can be modified in length, in diameter as in the dimensions of the syringes, needles and the contents of the syringe. These 5 parameters determine the series in production. However, given the elasticity of the tolerances in diameter and length, a series of parts can be suitable for several types of syringes,

  This advantage is one of those revealed by the present description.

  In accordance with the invention, returning to its original position the springs 5 and 5 b will engage in the axes 4 and 4b by the penetration of the teeth 20 and 20b, in the grooves 23 and 23 b in Figure 10 the system is self-locked and secure, ready for waste disposal However according to certain countries and in particular Germany the invention has in a zone 21 a circular groove on the envelope I which allows by simple pressure and to break at the same time as needle This option being used only for commercialization

  European and to meet the habits of operators.

  Because of this general arrangement, a drug addict who has lost consciousness following the injection of an illicit product would not pose a danger to others by possibly dragging down one of his contaminated needles. On the other hand, the reuse of the needle seems so complicated to take so long to put into practice that another addict could not use it.

following another.

  For caregivers, the use of such a device would allow absolute safety in the case of emergency and ACCIDENTIAL BITES by contaminated needles. We are talking about 253 people a year at scale

  of Europe which every year are contaminated in this way.

  For dentists the risk is permanent, we know that many people are contaminated in this way, we ignore the number L generalizations of these automatic envelopes would stop the risk, without economic overload if we compare it to the price of the treatments in tri - therapy

  for the sole cause of accidental and annual bites.

VARIABLE I

  The description developed may, depending on the manufacturing, have a variable;

  indeed parts 2 and 2b are provided by the present invention as 2 separate elements. For manufacturing needs, it can be envisaged that 2 and 2b is only a single piece having an axial opening allowing the stapling.

on the proximal part of the piston.

VARIBLE 2

  The invention describes a process of 4 arms foldable in a V shape along axes 4 and 4b. In fact the rigid shape of these arms can be envisaged for small dimensions of buccal intervention by only two semi-rigid arms at 12 and 12 b also serving as a spring. This variable eliminates the springs 5 and b, the notches 9, 9 b, 10 and 10b, the pins 14 and 14b, the housings 18 and 18b and teeth 20, 20b, 23 and 23b; However arms 13 and 13 b

  remain rigid on parts 2 and 2b. A system 6 and 6 b form anti-stop

return.

Claims (5)

  1- Automatic and self-locking safety device adapting to standard glass or plastic syringes from 0.1 mi to I Oml, which includes an envelope (1) open at both ends, the distal end of which is formed by two arms 12 and 12b separated by ogival shapes II and II b allowing a permanent reading of the injection state, these arms having axes 4 and 4b which come to hold parts 2 and 2b in holes made by winding two springs 5 and 5 b, the axes 4 and 4 b containing several functions each, in particular two lugs 14 and 14b 10, but also a cavity 18 and 18 b and a groove 23 and 23 b, the springs 5 and 5b which are wound on the axes 4 and 4b being supported on the arms 12 and 12 b, on one side and extending two arms 13 and 13 bjusqu 'to a system of clips 8 and 8b which is stapled on the pusher part of the piston, the arms 13 and 13 b having two stops 6 and 6 b serving as a non-return device, characterized by what the general device is formed of three elements, namely - a main element (1) open at its two ends and having two axes molded together 4 and 4b. as well as the pins 14 and 14b - 2 elements (2) and (2b) connected to it by the winding of the springs (5) and (5b   molded together with parts 2 and 2 b.   Said elements interlocking with each other, when the pins 14 and 14b are cut by the toothing 20 and 20b of the springs 5 and 5b 2- Device according to claim I, characterized in that during the injection, the part (1) is locked against the skin on its distal part and while the parts 2 and 2 b try under pressure to approach, the arms 12 12 b and 13, 13 b move away from the body of the syringe by forming two V thanks axes 4 and 4b.   3-device according to claims 1 and 2, characterized in that the!   arms 12, 12 b and 13.1 3b bend by notches made in their bases 9,9b and 10,1Ob.   4- device according to any one of claims   previous characterized by the fact that during the push the two springs 5 and b extend the arms 13 and 13b and 35 take support on the arms 12 and 12 b   tending to return the device to its initial phase.   -A device according to any one of the preceding claims   characterized in that two stops 6 and 6b force the device, at the end of injection and immediately after the operator has removed the bite, to stop   develop towards the distal part by covering the needle.   6- Device according to any of the claims   previous characterized in that the distal part of the envelope exceeds 5 mm The needle.   7- Device according to any of the claims   previous characterized in that the system resuming its natural place by the constraint of the springs engages the teeth 20 and 20b in the groove 23 and 23b by definitively blocking the device which can no longer be used