MXPA06006902A - Safety shield for medical needles - Google Patents

Abstract

Medical needle shield apparatus for covering a needle after use. The medical needle shield apparatus includes a first member, such as, for example, a syringe barrel having a needle mounted therewith. A second member, such as, for example, a shield is mounted with the first member. The shield is movable between a first position whereby the needle is exposed and a second position whereby the needle is covered. A lock is mounted with the barrel such that the shield is slidably movable along an outer surface of the lock. The lock includes a tang that is movable radially outward to fix the shield in the second position.

Description

SECURITY GUARD FOR MEDICAL NEEDLES Field of the Invention The present disclosure relates generally to safety guards for medical needles, and more particularly, to manually operated safety guards that use a structure for positioning and securing the guard. Background of the Invention Problems associated with inadvertently nailed needles are well known in the art of blood sampling, injections of percutaneous medications and other medical procedures involving the use of medical needles. Important attention is focused on problems with spiked needles due to sensitivity to simultaneous exposure to AIDS, hepatitis, and other serious bloodborne pathogens. Procedures for removing a needle from a patient commonly require that the clinician use one hand to apply pressure to the site of the wound where it is being removed, while removing the needle with the other hand. Also, a common practice for clinical staff is to give higher priority to wound care than to needle disposal. In the case of typical devices of Ref..173825 needles without safety guards, such a priority requires either the convenience of an appropriate pointy object container containing sufficient space, or another means to dispose of them safely, without forgetting the patient. In this way, often the difficulty in providing adequate care, while following safe procedures, is given together with the physical condition or mental state of the patient, such as units of burned people or psychiatric surveillance. In such conditions, proper disposal of used needles while caring for a patient is a technological challenge to the state of the art. The extensive knowledge and history associated with the care of needles and the problems of their disposal have resulted in numerous devices to minimize the problems of needles nailed accidentally. Some devices use a separate cover or hood mounted on the needle after use. However, these devices require two-handed manipulation on the part of the practitioner. Other known devices employ covers that are activated by means of springs or pivots. However, these devices can, in an inconvenient way, deviate when being nailed, activated inadvertently or be annoying when operated. Additional disadvantages of these devices include a high manufacturing cost, due to the complexity and number of parts. Therefore, this type of devices of the prior art can not adequately or reliably protect the needles apparatus for infusion and / or collection of fluids to minimize their risk exposure. Accordingly, there is still a need to provide a more satisfactory solution for the needle safety devices, solving the disadvantages and drawbacks of the prior art. Therefore, it would be desirable to provide a more adequate and reliable safety device that has a medical needle guard that uses a structure to position and secure a guard to minimize the risk exposure of a needle. It would be desirable if the medical needle shield is assembled and manufactured efficiently and simply. Brief Description of the Invention In a particular embodiment, a security apparatus is provided in accordance with the principles of the present invention. The security apparatus includes a first member with a needle mounted thereon. A second member is mounted on the first member. A protector that is movable between a first position, in which the needle is exposed, and a second position, in which the needle is covered. A latch that is mounted on the first member, such that the second member is slidably movable along an exterior surface of the latch. The latch includes a narrower end that is movable radially outward to fix the protector in the second position. In an alternative modality, the safety apparatus includes a cylindrical body. The cylindrical body has a more distant portion defining a cavity. A needle extends from the cavity and has a further end. A tubular shield is mounted within the cavity and is slidable relative to it, between a retracted position, where the far end of the needle is exposed, and an extended position, where the end furthest from the needle is covered. A tubular insert lock is mounted on the most distant portion of the cylindrical body, such that the guard is slidable along an outer surface of the insert. The latch includes a tongue that is in substantial alignment with the outer surface of the insert during the sliding of the protector. The tab is oriented out radially to fix the guard in the extended position. In an alternative embodiment, the cylindrical body has a further portion that includes an internal post and an outer channel defining a cavity. A proximal portion of the cylindrical body is configured to receive a plunger. A needle is mounted on the internal post of the cylindrical body and has a more distant end. A tubular shield is mounted so as to have a sliding movement within the cylindrical body cavity, between a retracted position, where the end furthest from the needle is exposed, and an extended position, where the furthest portion of the body is covered. the needle. The guard includes a stability ring that is configured to add structural integrity to the guard. A tubular insert lock is mounted on the inner post, such that the guard slides along an external surface of the insert. The latch includes a variety of tabs, positioned on the circumference thereof, such that the tabs are in substantial alignment with the external surface of the insert during sliding of the protector. The tabs are oriented radially outward to inhibit close movement of the guard in the extended position. In addition, the insert includes a distal stop configured to inhibit movement of the guard. In addition, in another embodiment, a security apparatus is provided in accordance with the principles of the present invention. The safety apparatus includes a first tubular member with a needle mounted on it. A second tubular member is mounted on the first tubular member. A protector is movable between a first position, in which the needle is exposed, and a second and third positions in which the needle is covered. The third position provides a tactile sensation of the protector's placement. A latch is mounted on the first tubular member, such that the second tubular member is slidable along an external surface of the latch. Brief Description of the Figures The following and other features and advantages of the present invention will be better understood from the following detailed description of the embodiments, taken in conjunction with the accompanying figures, in which: Figure 1 is an expanded view in perspective of a security apparatus, in accordance with the principles of the present invention; Figure 2 is a perspective view of the apparatus shown in Figure 1; Figure 3 is a cross-sectional side view of a further portion of the apparatus shown in Figure 1, in a position ready for use; Figure 4 is a cross-sectional side view of the most distant portion of the apparatus shown in Figure 1, in an extended position; Figure 5 is a cross-sectional side view of the most distant portion of the apparatus shown in Figure 1, in a secured position; Figure .6 is a perspective view of a cylindrical body of the apparatus shown in Figure 1; Figure 7 is a perspective view of a protector of the apparatus shown in Figure 1; Figure 8A is a perspective view of an insert of the apparatus shown in Figure 1; Figure 8B is a perspective view of an alternative insert of the apparatus, in accordance with the principles of the present invention; Figure 8C is a cross-sectional view of the insert shown in Figure 8B; Figure 9 is a cross-sectional side view of the most distant portion of the apparatus shown in Figure 1, in an extended position; Figure 10 is an enlarged biased side cross-sectional view of the most distal portion of the apparatus shown in Figure 1, in a fully extended position; Figures HA and 11B are perspective views of an alternative embodiment of the apparatus, in accordance with the principles of the present invention; Figures 12A and 12B are cross-sectional perspective views of the apparatus shown in Figures HA and 11B; Figure 13A is a cross-sectional side view of an alternative embodiment of the apparatus, in accordance with the principles of the present invention, in a partially extended position; and Figure 13B is a cross-sectional side view of the apparatus shown in Figure 13A, in an extended and secured position. DETAILED DESCRIPTION OF THE INVENTION The embodiments of the safety apparatus and the methods of operation stated herein are presented in terms of safety guards for medical needles for the infusion of medicaments and nutritional fluids (e.g., subcutaneously, intradermally, intravenously and / or intravenously). intramuscular), and the collection of fluids; and more particularly, in terms of manually operating the safety guards that use a structure to position and secure a guard to minimize risky exposure to the needle cannula, for example, when a needle is inadvertently nailed. It is contemplated that the needle cannula may be protected during use, including storage, transport, infusion and / or collection of fluids, and the subsequent to this. However, it is envisaged that the present invention will find uses for a wide variety of needle cannulas, including in applications for small needles and in devices for the infusion of preventive drugs, medications and therapeutic drugs to a subject. It is also envisaged that the present invention can be used to collect bodily fluids, including those used during procedures related to phlebotomy, digestion, intestines, urology, veterinary and the like. It is also envisaged that the safety device can be used with other applications of medical needles, including feeding devices, phlebotomy devices, catheters, catheter catchers, guidewire, spinal and epidurals, biopsies, apheresis, dialysis, blood donation , Veress needles, Huber needles, and things like that. In the description that follows, the term 'closest' refers to a portion of a structure that is closer to the clinical staff and the term 'more distant' refers to a portion that is further away from the clinical staff. As used herein, the term "subject" refers to a patient receiving infusions or from which fluids and / or blood are collected, thereby using the safety apparatus. In accordance with the present invention, the term 'clinical staff' refers to an individual who administers an infusion, performs a fluid collection, installs or removes a needle cannula from the safety apparatus and may include support personnel. The following statement includes a description of the security apparatus, in accordance with the present invention. Reference will be made in detail to the description modalities, which are shown in the attached figures. Now, observing the figures, the similar components are designated by means of similar reference numbers through several views. Referring to Figures 1 to 10, a safety apparatus is shown, such as, for example, a syringe needle or syringe 10. The syringe 10, as shown in Figures 1 to 5, includes a first tubular member, such as, for example, a cylindrical syringe body or cylindrical body 12 with a needle cannula or needle 16 mounted thereon by means of a needle assembly 11. An open beveled portion 23 is placed on a more distant end of the cannula Needle 16. The needle cannula 16 adheres to the cylindrical body 12 of the syringe on the needle assembly 11. The needle assembly 11 includes a nozzle portion 19 (Figure 3) to hold the adhesive. The needle cannula 16 penetrates the needle assembly 11, generally between a depth of 0.010 to 0.020 inches. The adhesive is used to secure the needle cannula 16 to the needle assembly 11. The adhesive forms a meniscus over the nozzle portion 19 and moves internally along the axis of the needle cannula and the needle assembly 11. , about half the depth of penetration of the needle. A second tubular member, such as, for example, a tubular shield 14, is mounted on the cylindrical body 12 and moves from a retracted position (Figure 3), where the needle 16 is exposed, to an extended position (Figures 4 and 5), where the needle 16 is covered. A latch, such as, for example, a tubular insert 26 is mounted on the cylindrical body 12, so that the protector 14 slides along an outer surface 28 of the insertion catch 26. The latch Insert 26 includes arms or tongues 30 that move radially outward to secure the shield 14 in the extended position. It is envisaged that one or more tabs 30 will be employed with the insertion catch 26. A removable cover 32 (Figures 1 and 2) covers the needle 16 during transport and before use. The cover 32 is notched to inhibit it from rotating when the syringe 10 is placed on a surface. The cover 32 may include another structure configured to inhibit it from rotating, such as projections, ridges and the like. The cover 32 is removably attached to the cylindrical body 12 of the syringe. The cover 32 is not in contact with the shield 14 to inhibit inadvertent operation of the syringe 10 when the cover member 32 is pulled and removed before use. The cover 32 can be recessed with heat to the cylindrical body 12 of the syringe, as an obvious characteristic of tampering, as is known in the art. A closer portion 34 of the cylindrical body 12, as shown in Figure 6, defines a plunger cavity 20, configured to receive a plunger 22 (Figure 1). Finger flanges 39 are positioned adjacent the proximal end 48 of the cylindrical body 12 to facilitate handling of the syringe 10. A more distant portion 36 of the cylindrical body 12 includes a post 40 on which the shield 14 slides and the insertion catch 26 is fixedly mounted. As shown in Figure 3, the post 40 has a more distal end 45 with an outer annular surface 47 and a nearer end 43 with an outer annular surface 51. The proximal end 43 has a diameter slightly greater than the most extreme end. 45. A circumferential flange 41 is defined by the junction of the outer annular surface 47 and the outer annular surface 51. The cylindrical body 12 additionally includes a conduit, such as, for example, a channel 46. Channel 46 and the post 40 define the cavity 44, configured to provide sliding to the protector 14 (Figure 7). The channel 46 and the post 40 guide and support the protector 14 during the passage in the cavity 44 and inhibit free movement between the components. The cavity 44, as shown in Figures 3 and 4, has a tubular configuration and is longitudinally limited by a closer closed end 42 and a more distant open end 49. The cavity 44 has a circular cross-section and is transverse limited by the internal circumference 9 of the cylindrical body 12 and by the external annular surfaces 47, 51 of the post 40. The cavity 44 may have alternative geometries to facilitate the movement of the protector 14, for example, the cavity 44 could have an oval cross-section, tubular, recessed or other polygonal shape. The cavity 44 may also be concentric with respect to the protector 14. A longitudinal slot 54 extends from a more distant end 13 to the cylindrical body 12, along an outer wall 15 thereof. The slot 54 is configured to guide the movement of the protector 14, as explained in more detail below. The post 40 defines a needle cavity 52 that engages an outer surface of the needle 16 to support it. A nearer end (not shown) of the needle 16 extends into the cavity of the plunger 20 to have a fluid communication therewith. In addition, the plunger cavity 20 is in fluid communication with the beveled portion 23, thereby allowing the fluid stored in the plunger cavity 20 to be in communication through the needle cannula 16 and beyond its further end. distant The shield 14, as shown in Figure 7, is configured to be telescopically mounted within the cavity 44 of the cylindrical body 12 of the syringe. It is envisioned that the shield 14 may include a tube portion 60 configured to cover the needle 16 and have an inner surface 61. A nearer end 58 of the tube 60 has a narrow inner surface 59. A circumferential flange 76 (Figure 4) is defined by the junction of the inner surface 61 and the inner surface 59 narrowed. An actuator 62 is placed on the tube 60 to cause sliding of the protector 14. The actuator 62 includes a neck 65 extending radially from the proximal end 58 of the tube 60. A notched edge 63 for fingers is placed on the neck 65. The protector 14 includes a stability member, such as, for example, a stability ring 64 for providing additional stability during axial movement of the protector 14 with respect to the cylindrical body 12 of the syringe 10. The stability ring 64 adds structural integrity to maintain the protector 14 firmly in place when it is secured in the fully extended position. The ring 64 surrounds the tube 60, near the proximal end 58, such that there is a space 73 between the outer wall 67 of the shield and the ring 64. The ring 64 has an intersection with the actuator 62 and includes an inner surface 69 and an outer surface 71. The stability member 64 may have alternative geometries configured to provide stability and / or structural integrity. The insertion catch 26, as shown in Figure 8A, is configured to be mounted on the post 40. As will be explained below in greater detail, the insertion catch 26 retains the guard 14 in a "ready for use" position. and inhibits the distal sliding of the shield 14. The insertion catch 26 also inhibits the shield 14 from moving from a fully protected position. The insertion catch 26 has annular inner surfaces 33 and annular outer surfaces 28, and includes a tubular safety cap 29 with a more distant end 31 and a nearer end 37. A stop member, such as, for example, a crown or protruding flange 72, is positioned on the most distant end 31 including a circumferential edge 73. The closest end 37 includes a circumferential edge 35. The insertion catch 26 includes a projection member, such as, for example, a tongue. 30, which moves radially outwards to fix the protector 14 in the extended position. One or more tongues 30 can be used. The tongue 30 is positioned circumferentially around the outer surface 28 of the insertion catch 26, at an intermediate location between the most distant end 31 and the nearer end 37 of the bushing 29. The tongue 30 is raised from the bushing 29 through from the opening 8 in the surface 28. The tongue 30 rotates on its own axis from its closest edge 30b. The tongue 30 is oriented to have an outward radial movement, such that its most distant end 30a tends to extend over the surface 28 to define the angle A thereof. When compressed, the tongue 30 rotates on its own axis in substantial alignment with the surface 28. The insertion catch 26 may include another structure configured to secure the shield 14, such as stops, protuberances and the like. The operation of the insertion insurance 26 is described below in greater detail. With reference to Figures 8B and 8C, where the reference numbers are used to designate similar elements, for the purpose of simplifying the explanation, an alternative embodiment of the insertion insurance 26 is described. The insertion lock 260 is configured to be mounted on a post 40 and is designed to retain guard 14 (Figure 4) in a 'ready-to-use' position and inhibit distal sliding of guard 14. Insertion lock 260 also inhibits guard 14 from moving closely from a fully protected position. Insertion latch 260 has interior surfaces 330 and exterior surfaces 280 and includes a tubular safety cap 290 with a more distal end 310 and a nearer end 370. A flange 720 is positioned at the most distal end 310 and includes a circumferential edge 730. The closest end 370 includes a circumferential edge 350.

The insertion catch 260 includes a tab 300 that moves radially outward to secure the shield 14 in the extended position. One or more tabs 300 can be used. The tongue 300 is positioned circumferentially around the outer surface 280 of the insertion latch 260, intermediate the most distant end 310 and the nearer end 370 of the safety tubular sleeve 290. The tongue 300 rises from the safety tubular cap 290 through opening 80 on outer surface 280. Tab 300 rotates on its own axis from its closest edge 300b. The tongue 300 is oriented to have an outward radial movement, such that its most distant end 300a tends to extend above the outer surface 280 to define an angle A therewith. When compressed, the tongue 300 rotates on its own axis in substantial alignment with the outer surface 280. The insertion latch 260 may include an additional structure configured to secure the shield 14, such as a projection member 740 that is positioned so as to circumferential around the outer surface 280 of the insertion catch 260 and is oriented radially inward to secure or secure the insertion lock 260 to the external surface 47 of the post 40 (Figure 3). One or more projection members 740 can be used with the insertion catch 260. It is envisaged that the insertion locks 26, 226 (described in greater detail below) and 260 can be made of metal or other durable and appropriate material for medical applications. , such as, for example, stainless steel. More particularly, the insertion lock can be manufactured by, for example, a process known as formed by progressive stamping, wherein a stamping component combines various forming and stamping functions, such as punching, molding, profiling, drilling and deburring in a single die cut. The rough metal part that will be finally formed, like the insertion lock, is fed to the die. Each time the die cuts a cycle, a stamping operation is made on the raw metal material and automatically advanced to the next position. Each station within the progressive die-cutting process serves to progressively form the final insertion insurance. Finally, the inserts 26, 226 and 260 are obtained at the end of the progressive stamping, once all the operations have been completed. The components of the security apparatus may be made of a material suitable for medical applications, such as, for example, polymers or metals, such as stainless steel, depending on the particular medical application and / or the preference of the clinical staff. Semi-rigid and rigid polymers are contemplated for manufacturing, as well as flexible materials, such as medical grade molded polypropylene. However, one skilled in the art will realize that other materials and methods of manufacture suitable for manufacture and assembly are suitable, in accordance with the present invention. The insertion catch 26 is mounted securely, as shown in Figure 3, on the most distant end 45 of the post 40 by means of the intervention existing between an inner surface 33 of the safety cap 29 and an outer surface 47. of the post 40. To further secure the insertion catch 26 on the post 40, the circumferential edge 35 of the insertion catch 26 is confined to the circumferential flange 41 of the post 40. In this respect, the outer surface 28 of the safety cap 29 is substantially aligned with the outer annular surface 51 along the nearer end 43 of the post 40. A more distant edge 73 of the rim 72 is substantially aligned with the more distal end 13 of the cylindrical body 12. The tabs 30 extend in an angle from the outer surface 28 of the safety cap 29, as described. The syringe assembly 10 can be made sequentially. For example, a shield 14 can be inserted into the most distant end of the cylindrical barrel 12 of the syringe, followed by the insertion catch 26 and the final assembly of the needle cannula 16 on the cylindrical barrel 12 of the syringe. The needle cannula 16 can be attached to the cylindrical body 12 of the syringe at any point during the assembly procedure. The operation of the syringe 10 during a medical procedure will be described below. Initially, the correct preparation and sterilization of the syringe 10 is performed (not shown), and the cover 32 is removed. The shield 14, as shown in Figure 3, is mounted telescopically on the post 40 in the ready position. to be used '(i.e., retracted), where the most distal portion 17 of the needle 16 is exposed. The narrower end 58 of the shield 14 is adjacent to the closest wall 42 of the cavity 44 and the narrow inner surface 59 of the shield 14 is contiguous with the external surface 51 of the post 40. The innermost distal surface 61 of the shield 14 it is close to the outer surface 28 of the safety flange 72. There is a space 74 between the inner surface 61 of the shield 14 and the outer annular surfaces 47 and 51 of the post 40. The tongue 30 is oriented to move radially outwa thus extending within the space 74, such that the most distant end 30a is close to the inner surface 61. The stability ring 64 associated with the shield 14 is positioned circumferentially around the outer wall 15 of the cylindrical body 12. The actuator 62 of the shield 14 extends through the slot 54. The insertion catch 26 mounted within the shield 14 retains the shield 14 in position. n ready to be used and inhibits distal gliding of this. The safety flange 72 is substantially aligned with the most distant end 56 of the shield 14. After completing the medical procedure, the clinician handles the shield 14 by means of a one-handed operation to cover the most distant end 17 of the shield. the needle 16, as shown in Figure 4. This is achieved by using the thumb or forefinger to urge the actuator 62 along the slot 54. Alternatively, a corner of a rigid surface, such as a table or counter can be used to manipulate the shield 14. Both techniques provide relative movement between the shield 14 the cylindrical body 12. While the shield 14 moves forward, the narrow inner surface 59 of the shield 14 slides along the surface external 51 of the post 40, and along the outer surface 28 of the insertion catch 26. The inner surface 61 of the protector 14 slides along the surface outer surface 28 of the rim 72. While the shield 14 moves further, as shown in Figure 9, the narrow inner surface 59 of the shield 14 slides over the tabs 30. Consequently, the tabs 30 are compressed in substantial alignment with the outer surface 28 of safety, such that the angle A is substantially equal to zero. After the tapered surface 59 of the protector 14 slides past the compressed tongue 30, as shown in Figure 5, the tongue 30 (being oriented to have an outward radial movement) closes back and out. That is, the tongue 30 rotates on its own axis from its proximal end 30b, such that the most distant end 30a extends into the space 74 to oppose any proximal (backward) movement of the protector 14. Securing the protector 14 in this way the syringe 10 is disabled and re-exposure of the needle tip 17 is inhibited. A "Y" shaped space, as shown in Figure 10, between the most distant end 30a of the tongue 30 and the closest end 58 of the protector 14, provides a free movement between these. This free movement allows the movement of the shield 14 to provide a tactile indication or feedback that the shield 14 is in the fully extended position. The circumferential flange 76 on the shield 14 internally confines the circumferential flange 78 of the safety flange 72 to inhibit the shield 14 from moving much distally. The inner surface 69 of the stability ring 64 engages with the outer wall 15 of the cylindrical body 12 to add structural integrity when the shield 14 is in the fully extended position. As described above, the insertion catch 26 disables the safety syringe 10 by inhibiting the shield 14 from moving proximally by means of the tabs 30, from a fully protected position to a re-exposure of the needle cannula 16. The insertion catch 26 defines the 'Y' space between the most distant end 30a of the tabs 30 and the shield 14 to provide free movement therebetween. This free movement allows slight movement of the shield 14 to provide a tactile indication that the shield 14 is in the fully protected position. The insertion catch 26 also inhibits the shield 14 from moving too distally, via the circumferential flange 76 and the nearest flange 78, in the safety flange 72 which acts as a forward stop. The metal insertion catch 26, the tabs 30, and the stop act to inhibit movement of the shield 14 in a fully protected position. A desirable advantage of the combination of the Y-space between the insertion catch 26 and the closest end 58 of the shield 14 is that it minimizes the fact that the lock and insert 26 comes out through the slot 54 during a catastrophic failure of the safety syringe 10. In case of such failure, the safety syringe 10 would remain in its safe position. In addition, if the safety syringe 10 is in a catastrophic failure, where the syringe 10 is subject to forces that would break the syringe 10, the syringe 10 is designed so that the proximal end of the needle cannula 16 and the shield 14 still remain in their protective position on the needle cannula 16. The configuration described above advantageously inhibits the removal of the protector 14 from the cylindrical body 12 of the syringe. In addition, the assembly of the shield 14 within the outer diameter of the cylindrical barrel 12 of the syringe keeps the profile of the needle quite low. This configuration avoids the impediment of administering the fluids via medical syringe needles during, for example, subcutaneous injections at a low angle, etc. Since the shield 14 is captured by the inner post 40 and the outer channel 46, a smooth, non-wobbling extension of the shield 14 is ensured on the needle 16. The entire shield 14 is held forward by the cylindrical body 12 of the syringe , so that the graduations or other marks on the cylindrical body 12 are not obscured. Other advantages include the one-hand activation of the medical syringe needle 10 and the inclusion of the stability ring 62 to add additional structural integrity when the shield 14 is in the fully extended or secured positions. With reference to Figures HA, 11B and 12A, 12B, where similar reference numbers are used to designate similar elements to simplify the explanation, it is described in an alternative embodiment of a needle or syringe needle safety apparatus 100, which includes a standard recess 102 mounted distally to be embedded in a cylindrical syringe body (not shown). Similar to the syringe 10, the syringe security apparatus 100 includes a cylindrical body component 120 with a needle cannula or needle 160 mounted thereon by means of the needle assembly 110. A tubular shield 140 is mounted on the body cylindrical 120 and is movable from a retracted position, 'ready for use' (Figures HA and 12A), where the needle 160 is exposed, to an extended, 'security' position (Figures 11B and 12B), where the needle 160 is covered. An insertion catch 26 is mounted on the cylindrical body 120 so that the guard 140 slides along an outer surface 28 of the insertion catch 26. A removable cover, similar to cover 32 (Figures 1 and 2) covers the needle 160 during transport and before use. The shield 140 is configured to be telescopically mounted within the cavity 440 (Figure 12B) of the cylindrical body 120. The shield 140 includes a tube portion 600 configured to cover the needle 160 after the medical procedure. An actuator 620 is placed on the tube 600. The shield 140 includes a stability member, such as, for example, a stability ring 640 to provide additional stability during axial movement of the protector 140 with respect to the cylindrical body 120 of the needle syringe 100. Stability ring 640 adds structural integrity to keep guard 140 firmly in place when secured in the fully extended position. Now, with reference to Figures 13A and 13B, where similar reference numerals are used to designate similar elements to simplify the explanation, it is described in an alternative embodiment of a safety needle or syringe needle 200 including a component of cylindrical body 212 with a needle cannula or needle 216 mounted thereon by means of a needle assembly 211. A tubular shield 214 is mounted on the cylindrical body 212 and is movable from a retracted, 'ready for use' position ( not shown) and a partially extended position (Figure 13A), where the needle 216 is, exposed; to an extended position, 'security' or 'secured' (Figure 13B), where the needle 216 is covered. An insertion catch 226 with at least one tab member 230 radially inwardly oriented (two tab members 230 are shown) is mounted on the tubular shield 214, such that the insertion catch 226 and tubular shield 214 slide with respect to the cylindrical body 212. A removable cover, similar to the cover 32 (Figures 1 and 2) covers the needle 216 during transport and before use. The cylindrical body component 212 further includes a pole member 240, on which the shield 214 and the latch 226 are slidably mounted.

The post 240 has a more distal end 245 with an extended annular surface 247. The more distal end 245 has a larger diameter than that of the post 240 for embedding the tongue members 230 of the insertion catch 226 and a wall of the nearest end 263 of protector 214 (as described below). The shield 214 and the insertion catch 226 are configured to be telescopically mounted within the cavity 244 of the cylindrical body 212. The shield 214 includes a tube portion 261 configured to cover the needle 216 after the medical procedure. An actuator 262 is positioned over the tube portion 261 to assist in the distal movement of the shield 214. The shield 214 further includes a wall of the nearer end 263 with a through hole 265 centrally disposed to slide along the post 240 of the cylindrical body 212. The nearest end wall 263 provides additional stability during axial movement of the shield 214 with respect to the cylindrical body 212. The nearest end wall 263 adds structural inity to hold the shield 214 firmly in place. your site when you secure a fully extended position. (Figure 13B). The operation of the safety needle apparatus 200 is similar to the operation of other needle safety devices (ie, the syringe needles 10 and syringe 100) described herein. After completing the medical procedure, the clinician manipulates the shield 214 forward (i.e., distally) to cover the most distant end 217 of the needle 216. While the shield 214 and the insertion catch 226 move toward in front, the inner surface of the shield 214 and the tabs 230 of the insertion catch 226 slide along the external surface of the post 240. While the shield 214 moves further, the tabs 230 slide over the most distant end 245. and on the annular surface 247 extended from the post 240. Consequently, the tabs 230 are compressed to allow the elongated annular surface 247 of the post 240 to pass the tabs 230. The tabs 230 (being oriented to move radially inward), are they close back and inward once the shield 214 and the tabs 230 pass the annular surface 247 of the post 240 (Figure 13B). That is, the tabs 230 rotate about their own axis, so that the tabs 230 extend inwardly to oppose any proximal (ie, backward) movement of the shield 214. Securing the shield 214 in this manner is disabled. to the needle apparatus 200 and the re-exposure of the needle tip 217 is inhibited. Referring to Figure 13B, the wall of the nearer end 263 of the shield 214 borders the more distant end 245 of the post 240 to inhibit the protector 214 moves too distally. Additionally, a space 'Z', between the wall of the nearest end 263 of the shield 214 and the most distant end 245 of the post 240 provides a free movement therebetween. This free movement allows movement of the shield 214 to provide a tactile indication or feedback that the shield 214 is in the fully extended position. The invention of the present application can be assembled in different specific modalities, without departing from the spirit and essential characteristics of this. For example, the first and second members may comprise a variety of transverse shapes, for example, oval and rectangular, while one of the first or second member may be slidable relative to the other. Therefore, the present embodiments are considered in all respects as illustrative and not restrictive, the approach of the invention is indicated in the appended claims rather than in the description, and all changes that fall within the meaning and range of equivalence of the claims are intended to be included here. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (10)

2. Having described the invention as above, the content of the following claims is claimed as property: 1. A medical device, characterized in that it comprises: a first member with a cavity and a post placed in the cavity; a second member slidably connected to the first member, the second member is movable between a first position and a second position; and a latch placed within the cavity, including the latch at least one arm, wherein the axial movement of the second member from the first position to the second position urges at least one arm towards the post, so that when the second member is in the second position, a more distant end of the at least one arm embeds a surface of the second member and inhibits the second member from moving towards the first position. The medical device according to claim 1, characterized in that at least one arm is oriented radially towards an interior surface of the cavity.
3. 3. The medical device according to claim 1, characterized in that the second member includes a closer flange for embedding the most distant end of at least one arm.
4. The medical device according to claim 1, characterized in that the first and second members are generally annular structures and the second member is concentrically connected to the first member.
5. The medical device according to claim 1, characterized in that a more distant end of the first member is exposed when the second member is in the first position and the distal end of the first member is covered when the second member is in the second position. .
6. The medical device according to claim 5, characterized in that it additionally includes a needle attached to the most distant end of the first member, such that the needle is covered when the second member is in the second position.
7. The medical device according to claim 1, characterized in that the second member moves between the second position and a third position, thereby providing an indication that the second member is inhibited from moving from the second position to the first position. position.
8. 8. The medical device according to claim 7, characterized in that the third position of the second member defines a space between the most distant end of at least one arm and a surface of the nearest flange
9. 9. The medical device according to claim 3, characterized in that the closest rim of the second member slidably nests to an inner surface of the cavity and provides stability during axial movement of the second member
10. 10. The medical device according to claim 7, characterized in that it additionally includes a flange placed at the most distant end of the safety, the flange embedding a portion of the second member when the second member is in the third position.