WO2019177479A1

WO2019177479A1 - An improved hypodermic needle protection and neutralisation device

Info

Publication number: WO2019177479A1
Application number: PCT/RS2019/000008
Authority: WO
Inventors: Vojin Jeremijevic
Original assignee: Vojin Jeremijevic
Priority date: 2018-03-12
Filing date: 2019-02-14
Publication date: 2019-09-19
Also published as: RS64046B1; RS20180301A1

Abstract

The invention is an improved device for the protection and neutralisation of the hypodermic needle, developed from the base (2) of the needle (1) which is surrounded by a spiral spring (4). A slide (3) has been put on the needle (1) with a sliding movement, which is, through a hinged quadrangle (5), connected to the base (2) by flexible couplings. The levers (51, 52) of the hinged quadrangle (5) are connected by fast joints (37, 38) to the slide (3). A rectangular opening (21) has been developed on the base (2), extending inwards and up to the upper base (2) surface. At the bottom of the base (2), along its perimeter, two outlets (24) have been designed. Crosswise to the central opening (36), in the slide (3), a canal has been made (34) of irregular shape. A hollow (35) has been made in the slid (3), near the bottom of the canal (34). A lever (32) has been positioned in the canal (34), with an arm (33) on its upper end, and an outlet (31) on the lower end.

Description

AN IMPROVED HYPODERMIC NEEDLE

PROTECTION AND NEUTRALISATION DEVICE

Technical Field

The invention belongs to the field of medical science, i.e. devices or appliancesdesigned to inject medicines into the organism, more precisely the field of appliances designed for subcutaneous , intravenous or intramuscular introduction of agents in the body.

According to the International Classification of Patents (ICP 2015.01), this invention was assigned to the class A 61 M 5/32 which includes needles, the constituent part of needles which provide its connection to the noozle or cap; needle protection devices.

Technical Problem

The technological problem solved by this invention concerns the method of constructing an improved device for the protection and neutralisation of the hypodermic needle which, by means of a slide positioned with its central opening at the tip of the needle, with an incorporated lever with eccentric outlets for locking in the upper and lower positions, the slide being, by means of elastic levers in the form of a hinged quadrangle, coupled with the needle basis, and by using a spiral spring positioned around the needle, and two outlets at the needle basis, enables simple compression, by one finger of any hand, of the mechanism lever downwards do 50% needle height, after which the hinge mechanism performs the pulling of the slide downwards, the compression of the spring, the locking of the eccentric outlet and releasing the needle for intervention, and then, by pressing the eccentric outlet, the release of the lever which presses the slide into the upper position and brings the needle into the protected position, thus protecting the operator from the risk of contamination, and enabling a possible subsequent use of the needle, with the needle base being continuouslty firmly attached to the syringe. Background Art

The applicant is familiar with the solution entitled "The Hypodermic Needle Protection and Neutralisation Device" for which there is PCT application no. PCT/FR99/01083, published under no. WO 99/59660, the inventor of which is the applicant for this patent. The aforesaid solution consists of a slide the central opening of which is put on the hypodermic needle and protects its tip in the uppermost position. This slide is attached by two pairs of levers (the hinged quadrangle) to the base to which the needle is firmly attached. The hinged quadrangle levers are interconnected, and connected to the slide and the needle basis by flexible couplings. The flexible couplings of the levers and other elements enable the slide to move along the needle from the uppermost to the lowermost position. This downward movement of the slide is initiated by pressing the thumb of one of the operator's hands on one of the upper levers of the hinged quadrangle. The thumb pressing must be continued until the slide reaches the needle base and releases it completely, bringing it to the active position. Following the intervention, the return of the slide into the initial position is performed by pressing the lower levers of the hinged quadrangle between the thumb and forefinger upwards. This upward compression continues until the slide reaches the uppermost position and fully protects the top of the needle. The return of the slide into tje initial position is a delicate operation which depends on the training and skill of the hospital, or technical staff. The compression vectors realised by pressing the thumb and forefinger onto the lower levers must be symmetrical in intensity and direction, which requires the operator's training and skill. Asymmetry in any one of the two parameters may result in the breaking of any of the flexible couplings between the levers of the hinged quadrangle, or the couplings of the levers to the needle base, with the additional risk of injury to the operator. In addition, in the course of pushing the levers upwards, the needle remains unprotected in its middle part, increasing the risk of the operator coming into contact with it and possibly with the blood of a patient with an infectious disease.

The aforesaid are the main shortcomings of the described patent solution. Disclosure of the Invention

The technical problem has been successfully solved with the improved device for protecting and neutralising the hypodermic needle, according to this invention. The device was developed from the needle base which is encircled by a spiral spring. The slide is put on the needle in a sliding movement, and connected to the base by flexible couplings through the hinged quadrangle. The upper pair of the levers of the hinged quadrangle is connected by fast joints to the slide. The upper and lower levers paris are interconnected by flexible sliding couplings, as well as the lower pair of the levers to the needle base. There is a rectangular opening at the needle base spreading from the lateral side to the upper base surface. At the bottom of the base, along its perimeter, two outlets have been made. The slide is designed with a central opening with th needle positioned in it with sliding movement). Crosswise to the central opening, there is a canal of irregular shape in the slide. A lever is placed in the canal with a lateral arm at its upper end, and an outlet at the lower.

The advantages of this solution of the improved hypodermic needle protection and neutralisation device are reflected in its simple, reliable and safe-use apllication. All the shortcomings described in the chapter The state of technology have been eliminated by this invention, which includes simple pressing, by one finger of one hand, of the mechanism lever downwards to 50% needle height, after which the hinged mechanism pulls the slide downwards, compressing the spring, without the operator's intervention or effort. The locking of the devide releases the needle for the intervention, after which the pressing of the eccentric outlet releases the spring which pushes the slide into the upward position, abd brings the needle into the protected position, with no intervention or effort on the part of the operator. Everything is performed almost automatically, protecting the operator from the risk of contagion, and enabling a possible repeated use of the needle, with the basis being continuously attached to the syringe. Brief Description of Drawings

The invention is explained in detail by the following enclosed designs:

- Figure 1. Shows the axonometric view of the improved device for hypodermic needle protection and neutralisation in the initial position;

- Figure 2. Shows the device from Figure 1 with the opened slide cap;

- Figure 3. Shows the device from Figure 1 in the active position;

- Figure 4. Shows the device from Figure 3 with the opened slide cap;

- Figure 5. Shows detail "A" from Figure 2;

- Figure 6. Shows detail "B" from Figure 4;

Detailed Description of Invention

The improved hypodermic needle protection and neutralisation device, according to this invention, has been developed from base 2 of needle 1 with spiral spring 4 around it between slide 3 and base 2, while slide 3, which is, by flexible couplings, connected to the basis 2 through hinged quadrangle 5, is put on needle 1 with a sliding movement. Levers 51 and 52 of hinged quadrangle 5 are connected by fast joints 37, 38 to slide 3. Levers 51 and 52 are connected by flexible movable couplings 59', 59", to levers 53 and 54, whicg are connected by flexible couplings 22 and 23 to base 2. On lever 51, on the inside, there is outlet 55 with elastic tab 57. On lever 52, on the inside, there is outlet 56 with elastic tab 58. Rectangular opening 21 has been made on base 2, extending to the inside and the upper surface of base 2. At the bottom of base2 , along its perimeter, two outlets 24 have been made. Slide 3 has been developed with central opening 36 with needle 1 positioned in it with a sliding movement.

Crosswise to central opening 36, in slide 3, canal 34 has been made of irregular shape. Canal 34 extends to the lower base of slide 3, immediately next to central opening 36. In slide 3, near the bottom of canal 34, there is hollow 35. Lever 32 has been installed in canal 34, with arm 33 positioned at its upper end, outlet 31 at the lower end, and outlet 32' on the lower third of its length. At the tip of slide 3 cap 39 has been designed, connected to slide 3 by flexible couplings 40. After the needle is positioned into central opening 36, and lever 32 into canal 34, cap 39 is bent arounf flexible couplings 40 covering the fron side of slide 3, and wleded to it by ultrasonic welding.

The improved hypodermic needle protection and neutralisation device functions as follows: by pressing one of the levers, 51 or 52, downwards by the operator's thumb, slide 3 is pulled down, along the axis of needle 1, compressing spring 4. During that time levers 31 and 32 are extending, and due to their fast joint connection to slide 3 they tighten up like arms of the bow in archery. Pressure is applied until exceeding 50% of the total lenght of stroke of slide 3. Following that, in the second part of the stroke, the elastic forces of tight levers 51 and 52 attempt to return them into the normal position compressing slide 3 downwards, to the lowermost position. In the lowermost position of slide 3, outlet 31 of lever 31 has passed through the upper part of opening 21 and hit its bottom, which resulted in a deformation of lever 32, while outlet 31 passed through the front opening 21, locking the whole device in the lower position. Deformed lever 32 has assumed an arched shape in the upper part matching the form of canal 34, due to which its arm 33, with its front, is leaning on needle 1. As a result of deformation of lever 32, iys outlet 32' has moved upwards, fell into hollow 35 and locked the lever in that position. In the lowermost position of slide 3, lever 4 of maximally compressed, outlet 31 in opening 21 locks the device, and outlet 32' locks lever 32. At that moment needle 1 is fully released (exposed) and the device is ready for injection. Following the intervention, the operator, by simply pressing outlet 31 with his/her thumb, compresses it inwards, releasing it from opening 32 (as in a ballpoint pen). This unlocks the device which, under the pressure of compressed lever 4 moves upwards to the uppermost point. On slide 3 reaching the uppermost point, the tip of needle 1 drops below arm 33 which, under the effect of deformed lever 32, moves above central opening 36, closing it completely. In this way the sinlge-use application of needle 1 is enabled.

To further secure the device gainst reuse, the operator can, by presing the thumb and forefinger on levers 51 and 52, move them towards the axis of needle 1, due to which tab 57 on outlet 55 falls into opening 58 on outlet 56, after which the device is definitely locked, and becomes medical waste. Industrial Applicability

The improved hypodermic needle protction and neutralisation device, based on this invention, is used as described above. The handling of this device does not require special knowledge, experience or training.

It shoild be noted that spring 4, besides its active function in handling the device, also has a protective function, preventing direct contact between the operator and the needle which may contain the blood of a possibly infected patient who has just received therapy.

Outlets 24 on base 2 of needle 1 serve for coiling into the spiral grooves on the syring (not displayed in the design). This type of locking (the so-called "luer-lock") of base 2 and the syringe provides fast and reliable attachment of needle 1 to the syringe.

To further secure the device against reuse, the operator can, by pressing the thumb and forefinger on levers 51 and 52, move them towards the axis of needle 1, due to which tab 57 on outlet 55 falls into opening 58 on outlet 56, after which the device is definitely locked, and becomes medical waste.

Claims

1. The improved hypodermic needle protection and neutralisation device, with slide 3, with its central opening 36, put on the needle in a sliding movement, the slide being connected by flexible couplings, through hinged quadrangle 5, to base 2 characterized by a spiral spring (4) being positioned between the base (2) and the slide (3) around the needle (1), by the levers (51, 52) of the hinged quadrangle (5) being connected by fast joints (37, 38) to the slide (3) in which, crosswise to the central opening (36), a canal has (34) has been made of irregular shape, which extends to the lower base of the slide (3) and in which a lever (32) has been freely positioned.

2. The imporved hypodermic needle protection and neutralisation devcie, according to claim 1, characterized by a hollow (35) being made in the canal (34) near the lower side of the slid (3).

3. The improved hypodermic needle protection and neutralisation device, according to claim 1, characterized by an arm (33) on the lever (32) in the upper part, an outlet (31) in the lower part, and an outlet (32') on the lower thrid of its length.

4. The imporved hypodermic needle protection and neutralisation device, according to claim 1, characterized by a rectangular opening (21) on the base (2)n which extends from the lateral side inwards, up to the upper surface of the base (2), while two outlets (24) have beend added at the bottom of the base (2), along its perimeter.