WO2004033007A1

WO2004033007A1 - Multi-med-uses retractable non-reusable syringe

Info

Publication number: WO2004033007A1
Application number: PCT/IB2003/004419
Authority: WO
Inventors: Jun Piao Teng
Original assignee: Jun Piao Teng
Priority date: 2002-10-08
Filing date: 2003-10-03
Publication date: 2004-04-22
Also published as: AU2003264783A1

Abstract

A multi-med-uses retractable non-reusable syringe has an intruder (261) with tip caps (264) at the end of a plunger shaft (22), a hollow body (10) has internal lateral notches (131) adjacent a female screwed section (141) at its lower open end, wherein a needle carrier (40) is mounted through the female screwed section (141) onto a nozzle (55) of a rubber slip tip (50) which is fixed against the lateral notches (131), an outward projected abdomen-shaped tag (231) which can be depressed downward, stands midway on the shaft (22) acting as a landmark for reminding here is the utmost position to avoid being locked when drawing up medication, the tip caps (264) will block against a nozzle lumen (56) of the rubber slip tip (50) when the plunger (20) is fully pushed, so that the needle carrier (40) along together with the rubber slip tip (50) are retracted into the hollow body (10) upon retraction of the plunger (20).

Description

MULTI-MED-USES RETRACTABLE NON-REUSABLE SYRINGE

1/. TECHNICAL FIELD OF THE INVENTION:

The present invention relates in general to a retractable non-reusable syringe, which can be used for multiple functions in the medical fields.

21. BACKGROUND OF THE INVENTION:

One of the ways in which acquired immune deficiency sydrome (AIDS) spread is by sharing the same injection needle with an infected person. A drug-user usually reuses a spent syringe which then practically is circulated among the group of drug-users for convenient purpose or other reasons. In order to reduce spreading of AIDS, an absolute non-reusable syringe is therefore, important to stop them from using a spent syringe. Besides, it is well known that each healthcare worker always be in touch with hundred times of spent needles daily during or after injections, there has been a lot of efforts in our hospitals to educate hospital personnel to take every possible caution to prevent needle stick injuries and to take appropriate medical treatments after needle-stick. However, a more fundamental solution to prevent the injuries as strong recommended by senior medical professionals, is to develop a new syringe with improved structures which eliminate the operation procedures mostly responsible for the currently reported injuries cases. Furthermore, most hospitals and clinics are currently using conventional disposable syringes for so many applications in addition to giving injections such as: syringe pumps (to introduce medical substances, e.g. fluid, drug, electrolyte etc. directly into a vain or between tissues of the human body); intravenous pushes; drawing blood; irrigation; aspiration etc. etc. Most of these applications generally (especially drawing blood) do not allow the syringe to be re-used, therefore an absolute non-reusable syringe can help solve this problem also.

Besides, since Needlestick Safety and Prevention Act in USA restricts all healthcare workers to use Safety Syringes to prevent from accidental needlestick injuries, therefore, most USA hospitals and clinics require a standard syringe which is economic compulsorily to do all of the above applications, plus, it must now incorporate safety features which protect the healthcare workers also.

So far, there have been near hundred U.S. patents disclosing various devices to prevent the sharp needle cannula from coming in contact with human skin. These devices generally fell into two categories.

The first of the two categories involved sheathing the needle cannula with an extra plastic tube slidable axially along the syringe barrel and which can be locked in the desired position to protect the shaφ needle point from sticking whoever is using and disposing of the syringes, during or after use. The second category falls into a device for retracting the needle cannula into the syringe barrel after use in order to eliminate recapping the needle after an injection and to eliminate disposing of the protruding needles in the waste container. Some others are being able to retract the needle, but unfortunately, most of them are either too complicated structure, or having too many precision components to be made at high cost against the currently available syringes, or practically impossible to function properly although seemingly applicable theoretically, and the most important is none of them can be matched with existing iiifusion pumps for performing assorted medical applications as above-said, because either for the reason that their sheaths cannot fit into the pump, or their needles cannot be removed after frxed in the factory, or the nozzle of the barrel does not suitable for the catheter cap to fit with. Therefore, an economic retractable and non-reusable syringe which also can be suitable for multiple medical uses are required.

USA-5344403 dated September 6, 1994 by Rahnfong Lee discloses a retractable safety syringe which has a hub at the end of its plunger which engages a needle carrier when the plunger is depressed so that the needle carrier can be withdrawn into the syringe along with the needle. The plunger has a V-shaped notch located near the hub which can be broken off at any angle, thereby trapping the spent needle within the syringe for preventing it fallen off to injure people. However, the broken V-shaped notch in practical can be glued to recover for reusable, and also it cannot be used for other medical applications besides injection only.

UK-A-2246297 (1992) discloses a non-reusable syringe with an interlocking means. The interlocking means comprises first members in the form of a plurality of pawls engaged with a second member in the form of an undercut recess provided on the barrel and the piston, respectively, of the syringe. This arrangement complicates the construction of the interlocking means and increases the cost of manufacturing, and also it cannot be used for other medical applications besides injection.

Singapore Patent Filing No. 96104294 dated August 10, 1996, and PCT International Application No. PCT/IB97/01190 dated August 6th, 1997, by Teng Jun Piao, same inventor of present invention, disclosing a non-reusable syringe, entitled as Anti Reuse Syringe (Mode C), which discloses the end of the plunger shaft and the protruding conduit of the syringe hollow body include interlocking means for locking the plunger to the lower end inside the hollow body upon fully depressing the plunger. The shaft of the plunger includes a fragile portion which is adjacent the piston to allow the shaft to break upon a reuser trying to withdraw the plunger which is still locked inside the protruding conduit of the hollow body, so that the spent syringe cannot be reused, but the needle cannot be retractable and also it cannot be used for other medical applications besides injection.

Singapore Patent Filing No. 9702131-5 dated June 24, 1997, and PCT International Application No. PCMB98/00950 dated June 22, 1998, by Teng Jun Piao again, disclosing An Automatic Retracted Non-Reusable Syringe, wherein two elongated springy matters are linked in between two spring holder sections fixed separately at the internal upper end of the hollow body and adjacent the piston respectively. The needle carrier so that can be automatically retracted with the plunger into the hollow body by the reversed elastic force from the springy matters after inserting tightly the pipe-shaped intruder of the plunger shaft into the hollow centre of the needle carrier when the injection is completed, whereby preventing the spent needle to injure people accidentally. There are two fragile portions, which are located at the intruder of the plunger and adjacent the piston of the plunger shaft respectively. Both fragile portions are easy to be broken off when the re-user attempts to separate the plunger from the needle carrier, so that the spent syringe cannot be reused. In one embodiment, the broken structure of the intruder is inserted tightly and deeply into the hollow centre of the needle carrier until reaching at the needle such that the needle is stuck and close the air duct at the entrance, so that the syringe will generally not function properly. But this invention also cannot be used for other medical applications besides injection.

Singapore Patent Filing No. 200000804-5 dated February 28, 2000, and PCT International Application No. PCT/1B01/00241 dated February 23, 2001, by Teng Jun Piao again, disclosing a piston adjacent the shaft surrounded with a rubber material which protrudes a pipe-shaped intruder at an angle from the centre therein, wherein the needle carrier can be manually retracted with the plunger into the hollow body by inserting tightly the intruder into the hollow centre of the needle carrier when the injection is completed, whereby preventing the spent needle to injure people accidentally. Upon furtherly withdrawing the needle carrier into the hollow body, the intruder will be elastically returned to original inclination to locate the needle end touching tightly against the inner wall of hollow body, so that the needle will be destroyed, when the re-user attempts to reuse by pushing the plunger forward until pressing the needle at the lateral notch for purpose of releasing the needle carrier from the intruder through the protruding conduit Furthermore, there are a couple of fragile portions, which are adjacent the piston of the plunger shaft. The fragile portions are easy to be broken off when the re-user is for reuse purpose, attempting to withdraw the plunger until the piston is stopped against the projecting flange which is disposed internally nearby the upper end of the hollow body, and important is that it should do so, so that the spent syringe cannot be reused. Even though an attempt may be made to glue the broken plunger shaft together again, the rejoined structure is so weak that it will generally be broken again upon repeated withdrawal of the plunger. But it also cannot be used for other medical applications besides injection.

It is therefore the intention of the present invention to come up with a new design of syringe with retractable needle and which can be used in association with infusion pumps suitable for multiple medical applications besides injection. It is simple in structure using near the same number of component parts as the currently available disposable syringes, and which costs therefore is nearly the same as the current non-retractable syringes. Yet it has all the desired retractable function as well as non-reusable functions, additionally it can be matched with any infusion pumps. This new design should be able to be produced in the same ways as existing disposable syringes, being used without special care or caution and it requires no skilled workers and expensive instruments to assemble. The dead space carrying the residual medication or fluid is much less than the current types. Furthermore, the needle will not fell off the carrier to injure people by no chance no matter what happen.

3. SUMMARY OF THE INVENTION:

Accordingly, it is a primary object of the present invention to provide a multi-med-uses retractable non-reusable syringe.

According to the most general aspect of the present invention there is provided a multi- med-uses retractable non-reusable syringe comprising, a hollow body lying a projecting perimetric flange at one end and a protruding conduit at other end, a rubber slip tip has seals externally at the upper open end extended forward connected to a nozzle terminated with a nozzle lumen at other assembled at the upper portion of the protruding conduit, which is associated with the lower portion of the protruding conduit to include a pump means for suction and infusion of fluid etc. when connecting to a catheter by means of an infusion pump, a plunger associated with the hollow body for reciprocal movement therein, a needle mounted within a carrier, wherein the needle carrier is mounted onto the rubber slip tip within the protruding conduit readily for retraction after injection, the plunger comprising a piston with a pipe-shaped portion which includes an intruding means extended forward connected to an end of a shaft, the shaft being manually or by mechanical means operable to move the piston with the intruding means towards or backwards from the protruding conduit to expel or suck liquid from or into the hollow body through the needle or the catheter therein respectively, wherein the intruding means penetrating through the rubber slip tip for engaging the plunger to the needle carrier upon fully depressing the plunger whereby causing the needle carrier to enter the hollow body upon withdrawal of the plunger, a tag is cast on the plunger to keep the intruding means safe from being engaged with the rubber slip tip whereby reminding the user to stop here upon drawing up medication, but under normal circumstances, such as. in progress of injection, the tag can be depressed downward entering into the hollow body, the shaft also includes a fragile portion adjacent the piston at other end allowing the shaft to break whereby retaining the needle carrier inside the hollow body permanently, so that it cannot be re-used, characterised in that the rubber slip tip is made of rubber material which designs and hardness of the material can perform leak-proof fiinction to match with the pump means therein as well as mounting with the needle carrier to carry out injection.

Preferably, the rubber slip tip fixed at the upper portion of the protruding conduit of the hollow body acts as part of the pump means, associated with another part of the pump means located at the lower portion of the protruding conduit of the hollow body is one or a plurality of female screwed threads or ridges, both of which connecting to the catheter which has one or a plurality of male screwed flanges or threads.

Preferably, the leak-proof rubber slip tip mounting with the needle carrier which is without conventional oval shaped projecting flange at its opening edge.

Preferably, the intruding means comprises a pipe-shaped portion at one end of the shaft ended with an arrow-shaped tip pointing ahead wherein a small isolated gap located at the central position therein.

Preferably, the tag comprises an outward projected abdomen-shaped body ahead towards the tip of the shaft supported with a weak base stands on a tag flange at midway of the shaft.

Preferably also, the fragile portion between the plunger and the shaft comprises four weak connected wings of the shaft with an isolated gap in central position.

The present design of the invention comprising five elements, wherein only one element more than conventional disposable syringes, but as the same number of component parts with the current commercially available non-retractable syringes, is therefore cost competitive, in addition to all the extra characteristics, such as: this invention is non- reusable, plus, it can be fitted with any infusion pumps for other medical applications besides injection and it is needle retractable to guard against needle sticks associated with our new syringe design. All these features distinguish this design from the other prior disclosed patents.

4. BRIEF DESCRIPTION OF THE DRAWINGS:

Embodiments of the invention will now be described, by way of example only, with reference to the drawings. In the drawings:

Figure 1 shows a perspective view of the dismantled parts of the syringe and also the catheter as well.

Figure 2A shows an enlargement of the rubber slip tip and the needle carrier fixing into the inner wall of the protruding conduit upon assembling.

Figure 2B shows an enlargement of the plunger indicating the intruding section, the fragile portion and the tag with the assembling rubber material at the piston.

Figure 3 shows a cross-sectional view of the assembled syringe before drawing up fluid, focusing on the tag is standing upright locating the safe distance from being trapped, and the arrow tip of the intruder is depressed downward within the hollow course of the rubber slip tip.

Figure 4 shows a cross-sectional view of the assembled syringe after fully injection, focusing on the tag which body is outward projected abdomen-shaped supported with a weak base, so that it is depressed down entering into the hollow body horizontally, and the arrow tip of the intruder is recovered to its original status causing engagement with the rubber slip tip and the needle carrier as well. Figure 5 shows a cross-sectional view of the assembled syringe indicating the intruder's engagement with the rubber slip tip carrying along with the needle carrier retracted totally entering into the hollow body when the plunger is completely withdrawn until the piston stopping at the projecting perimetric flange of the hollow body.

Figure 6 shows a cross-sectional view of the assembled syringe indicating when the plunger is further withdrawn, wherein the plunger will be broken at the fragile portion adjacent the piston which when being stopped by the projecting perimetric flange of the hollow body.

Figure 7 A shows an enlargement of the male screwed flange of the catheter cap before locking with the female screwed thread inside the protruding conduit.

Figure 7B shows an enlargement of the female screwed thread inside the lower portion of the protruding conduit, wherein the rubber slip tip is fixed centrally along the lateral notches at the upper portion of the protruding conduit ready for installing the needle carrier or the male screwed flange of the catheter thereon either.

Figure 8 shows a cross-sectional view of an empty assembled syringe clamped properly within an infusion pump which is held at the upright vertical position ready for carrying out the aspiration or the infusion, focusing on the tag is standing upright indicating that it is at the safe distance, and the arrow tip of the intruder is depressed downward within the hollow course of the rubber slip tip.

Figure 9 shows a cross-sectional view of the empty assembled syringe locked with the male screwed flange of the catheter being clamped properly within an infusion pump which is held at the upright vertical position ready for carrying out the aspiration to suck fluid, or the unwanted substances or foreign objects from a body cavity or area upon mechanically sliding the plunger backward. Figure 10 shows a cross-sectional view of the assembled syringe finished carrying out the aspiration mechanically, wherein the fragile supporting flange is stopping at the projecting perimetric flange of the hollow body.

Figure 11 shows a cross-sectional view of a loaded assembled syringe locked with the male screwed flange of the catheter being clamped properly within an infusion pump which is held at the upright vertical position for carrying out the infusion to introduce fluid, drug, electrolyte etc directly into a vein or between tissues by mechanically pushing the plunger forward.

Figure 12 shows a cross-sectional view of the assembled syringe finished caπying out the infusion mechanically, wherein the intruder is engaged with the rubber slip tip.

Figure 13 shows a cross-sectional view of the assembled syringe after carrying out the infusion, wherein the catheter cap is released from the protruding conduit, and the rubber slip tip is manually retracted with the intruder into the hollow body until the piston reaching at the projecting perimetric flange, such that the shaft can be broken upon further withdrawing the plunger manually.

Figure 14 shows a cross-sectional view of another assembled syringe ready for carrying out the irrigation or other medical applications which do not require matching with the needle carrier or the catheter to do so.

Reference Numerals In Drawings:

10 hollow body

11 finger grips

12 projecting perimetric flange

13 protruding conduit (upper portion) 131 lateral notches

14 protruding conduit (lower portion) 141 screwed threads 15 notch base 0 plunger 01 piston 1 push-button

22 cross-shaped flanged shaft 3 tag flange 31 outward projected abdomen-shaped tag 32 tag base 4 fragile portion 41 gap 42 fragile supporting flange 5 piston flange 51 front rim of piston flange 52 rear rim of piston flange 53 piston's supporting flange 6 intruder flange 61 intruder 62 arrow shaped tip 63 tip gap 64 tip cap 0 rubber material 1 front seal 2 rear seal 3 central hole 0 needle carrier 1 round shaped carrier flange 2 hollow centre of carrier 3 holding means of needle carrier 4 needle 50 rubber slip tip

51 front tip seal

52 tip body

53 rear tip seal

54 hollow centre of tip

55 nozzle

56 nozzle lumen

57 nozzle lumen edge

60 catheter cap

61 male screwed flange or thread

62 cap end

63 catheter

70 infusion pump

71 holder

72 sliding clamp

5 DETAILED DESCRIPTION OF THE DRAWINGS:

Figure 1 shows a perspective view of the dismantled parts of the syringe which comprises a hollow body (10), a plunger (20), a rubber material (30), a needle carrier (40), a rubber slip tip (50) and a catheter cap (60) connected to a catheter (63), which cross-sectional views are as shown on Fig. 2A and 2B respectively, should be herewith referred to simultaneously. Body (10) has a finger grips (11) at the upper end, adjacent to which is an inward projecting perimetric flange (12) of a little bit above the inner wall of body (10), and a ridgy protruding conduit (13, 14) at the lower open end. Protruding conduit (13,, 14) is divided into two portions by a c cumferential notch base (15), such that its upper portion (13) is disposed internally with two circumferential rows of lateral notches (131), and its lower portion (14) cast with a couple of equivalent female screwed threads (141) running opposite spirally round the inner wall of lower portion (14) until reaching at notch base (15). Its chemical composition of the raw material used is the same as the existing single-use syringe sold in the market, i.e. thermoplastic Polypropylene with the same physical and chemical characteristics. The capacity of the medication liquid (not shown) is indicated as scaled marks on the wall of body (10). Plunger (20) consists of a push-button (21) at the upper end, a cross-shaped flanged shaft (22) in the middle which is declining in sizes towards the upper end, a tag (231) is designed as an abdomen-shape outward projected at the midway ahead towards the tip of plunger (20) forming a declining area beginning at its upper portion till its peak, which is additionally with support of a weak tag base (232) standing upright on a tag flange (23) at shaft (22), such that tag (231) is capable of being depressed downward smoothly when entering into projecting perimetric flange (12) of hollow body (10) or vice versa, alternatively, tag base (232) is so weak that tag (231) can be torn off before injection, a piston (201) surrounded with rubber material (30), a fragile portion (24) connecting to a piston flange (25) with a gap (241) in between which is radiately supported by a fragile supporting flange (242) adjacent piston (201), piston flange (25) which perimetric rims are slightly declined in diameters from front rim (251) towards rear rim (252) which function is to allow piston flange (25) entering through projected perimetric flange (12) with ease upon assembling of the syringe, but it is to be blocked by projected perimetric flange (12) afterwards, integrally connected to a piston supporting flange (253) and an intruder flange (26) extending forward connected to a pipe-shaped intruder (261) terminated with an arrow-shaped tip (262), which has a narrow and short tip gap (263) in between, such that it divides tip (262) into two equal portions of tip caps (264) therein. Rubber material (30) comprises a front seal (31) and a rear seal (32) disposed externally along its body and a hole (33) is cast centrally therein to let intruder (261) be penetrated through. Rubber material's (30) chemical composition of the raw material used is the same as the existing single-use syringe sold in the market with the same physical and chemical characteristics. Needle carrier (40) integrally comprises a round shaped carrier flange (41) at its upper open end, a hollow carrier (42) and a holding means (43) to hold a needle (44), characterised in that external diameter of carrier flange (41) must be small enough to penetrate through lower portion of protruding conduit (14), so that carrier (40) can be retracted smoothly into hollow body (10) upon withdrawal of plunger (20). Rubber slip tip's (50) chemical composition of the rubber raw material used is the same as the current commercially available syringes, but its hardness must be harder of above 65 degree, comprises a front tip seal (51) and a rear tip seal (53) running in parallel along its tip body (52) externally with a hollow centre (54) in the central at one end, integrally protrudes forward a nozzle (55) terminated with a nozzle lumen (56) and a nozzle lumen edge (57) at other end. Both seals (51, 53) are used to be assembled tightly against both lateral notches (131) of upper protruding conduit (13) respectively for balance holding and leak-proof functions, wherein needle carrier (40) penetrating through female screwed threads (141) of lower protruding conduit (14) mounted onto nozzle (55) tightly upon injection. Catheter cap (60) is hollow at the centre comprising one or a plurality of male screwed flanges or threads (61) projecting at one end, connecting to a hollow catheter (63) with a cap end (62) at other end, wherein male screwed flange (61) screwed tightly against female screwed threads (141) of protruding conduit (14) of hollow body (10), and hollow centre of catheter cap (60) mounted onto nozzle (55) of rubber slip tip (50) within protruding conduit (14) simultaneously upon suction or infusion of fluid etc. as shown on Fig. 7A, Fig. 7B and Fig. 9 afterwards. Figure 3 shows when the assembled syringe is before drawing up fluid, tag (231 ) is standing upright on tag flange (23) of plunger (20) leaning against finger grips (11) of hollow body (10) indicates that it keeps the safe distance for plunger (20) from being engaged with rubber slip tip (50), wherein both tip caps (264) originally separated by tip gap (263) are now being depressed together within the hollow course of rubber slip tip (50) . Figure 4 shows when the assembled syringe is after fully injection, tag base (232) of tag (231) stands on tag flange (23) is so weak that either tag (231) can be torn off before injection or alternatively let it be depressed down entering into hollow body (10) horizontally instead due to its outward projected abdomen-shaped body as described in Fig.l above, wherein both tip caps (264) of arrow shaped tip (262) is recovered to its original elastic status being separated between tip gap (263) again, so that tip caps (264) becomes wide open to block against nozzle edge (57) at nozzle lumen (56) of nozzle (55) whereby causing plunger (20) engaged with rubber slip tip (50) which also carries together with needle carrier (40) tightly as well

Figure 5 shows when the assembled syringe is after frilly retraction of plunger (20), intruder's (261) engagement with rubber slip tip (50) which also carries together with needle carrier (40) retracted totally entering into hollow body (10) until piston flange (25) of piston (201) blocking at projecting perimetric flange (12) of hollow body (10). Figure 6 shows when piston flange (25) of the assembled syringe is blocked against projecting perimetric flange (12) and if when plunger (20) is further withdrawn, plunger (20) will be broken at fragile portion (24) adjacent piston (201), whereby causing needle (44) retained staying inside hollow body (10) permanently which never falls off to prevent the healthcare workers safe from needlestick injuries, and so that the syringe cannot be reused. Even though an attempt be made to glue broken plunger (20) together again, the rejoined structure of fragile portion (24) is so weak that it will generally be broken again upon repeated withdrawal of plunger (20).

Figure 7A shows an enlargement of catheter cap (60) which is hollow centrally, projecting with an outward layer of male screwed flange (61) connected to hollow catheter (63) at cap end (62) which is ready for locking with protruding conduit (13, 14) of hollow body (10) as shown on Figure 7B hereunder.

Figure 7B shows an enlargement of female screwed threads (141) are lying along inner wall of lower portion of protruding conduit (14) until reaching at notch base (15), wherein front tip seal (51 ) and rear tip seal (53) of rubber slip tip (50) are fixed along at a couple of lateral notches (131) respectively which are parallel undercut at the inner wall of upper portion of protruding conduit (13), so that nozzle (55) of rubber slip tip (50) is fixed centrally within protruding conduit (13,14) accordingly ready for mounting with either needle carrier (40) or catheter cap (60) therein.

Figure 8 shows an empty assembled syringe which hollow body (10) clamped properly in between a couple of holders (71) within an infusion pump (70), and push-button (21) of plunger (20) is clamped within a sliding clamp (72) at the top position of infusion pump (70) which is held at the upright vertical position ready for locking with catheter cap (60) to carry out the aspiration or the infusion, focusing on tag (231) is presently standing upright against finger grips (11) of hollow body (10) indicating that it is at the safe position for avoiding plunger (20) being engagement with rubber slip tip (50), wherein arrow tip caps (264) of intruder (261) are depressed together at tip gap (263) within the hollow course of rubber slip tip (50).

Figure 9 shows an empty assembled syringe being connected with catheter cap (60) at one end of hollow body (10), and push-button (21) of plunger (20) is about to be withdrawn mechanically within sliding clamp (72) at other end, lying on a vertical holding infusion pump (70), wherein male screwed flange (61) of catheter cap (60) being locked against female screwed threads (141) at protruding conduit (14) as well as hollow centre of catheter cap (60) being mounted onto nozzle (55) of rubber slip tip (50) within protruding conduit (13) simultaneously being ready for carrying out the aspiration to suck fluid, or the unwanted substances or foreign objects from a body cavity or area upon mechanically sliding push-button (21) backward.

Figure 10 shows when the assembled syringe finished carrying out the aspiration mechanically, wherein push-button (21) is being pulled backward by sliding clamp (72) of infusion pump (70) until fragile supporting flange (242) reaching at projecting perimetric flange (12) where is the farthest position to load any substance within hollow body (10), or alternatively at any desired position within hollow body (10) as programmed in infusion pump (70) accordingly.

Figure 11 shows another way of application , wherein hollow body (10) of the assembled syringe has already been loaded with fluid etc., lying on vertical upholding infusion pump (70) being clamped tightly midway between a couple of holders (71), top end is pushbutton (21) of plunger (20) being presently pushed by the force of sliding clamp (72) forward mechanically, causing piston (201) being currently pushed towards lower end of hollow body (10), wherein female screwed threads (141) of hollow body (10) is attached with catheter cap (60) as previously described, whereby carrying out the infusion to introduce fluid, drug, electrolyte etc directly into a vein, or between, tissues by mechanically pushing plunger (20) forward continuously as programmed in infusion pump (70) accordingly. Figure 12 shows when the assembled syringe is finished carrying out the infusion mechanically as programmed in infusion pump (70), wherein tip caps (264) of intruder (261) being recovered to original elastic status releasing tip gap (263) in between, whereby causing plunger (20) engaged with rubber slip tip (50) as previously described. Figure 13 shows the assembled syringe after carrying out the infusion application, wherein catheter cap (60) is released from female screwed threads (141) of protruding conduit (14), and rubber slip tip (50) is manually retracted by intruder (261) into hollow body (10) until piston flange (25) blocking at projecting perimetric flange (12), such that shaft (22) can be broken at fragile portion (24) upon further withdrawal manually whereby causing the syringe cannot be reused.

Figure 14 shows an assembled syringe is ready for carrying out the irrigation or other medical applications which do not require matching with needle carriers (40) or catheter (63) to do so.

While the preferred embodiments of the present invention and their advantages have been disclosed in the above detailed description, the invention is not limited thereto but only by the scope of the appended claims.

Claims

1. A multi-med-uses retractable non-reusable syringe comprising: a hollow cylindrical body (10) having an open upper end, an open lower end, a finger grips (11) at the upper end adjacent an inward projecting perimetric flange (12) and an inward ridgy protruding conduit (13, 14) at the lower end, a hollow cylindrical rubber slip tip (50) comprising one or a plurality of circumferential seals (51, 53) disposed externally at upper end extended forward connected to a nozzle (55) terminated with a nozzle lumen (56) at lower end assembled at the upper portion of said protruding conduit (13), a plunger (20) associated with said hollow body (10) for reciprocal movement therein, the lower portion of said protruding conduit (14) and said rubber slip tip (50) includes a pump means for suction or infusion of fluid etc from or into body cavity or area when connecting to a current commercially available catheter cap (60) of a catheter (63) by means of a programmatic infusion pump (70), a needle (44) mounted within a carrier (40) at the lower end, wherein said needle carrier (40) has a round shaped carrier flange (41) disposed circumferentially at the upper open end which dimension is allowed to penetrate through the lower portion of said protruding conduit (14) mounted onto said nozzle (55) of said rubber slip tip (50) within the upper portion of said protruding conduit (13) readily for being retracted into said hollow body (10) after injection, said plunger (20) comprising a piston (201) surrounded with a rubber material (30) extended forward connected to a pipe-shaped portion (261) which includes an intruding means (262) at an end of a shaft (22), said shaft (22) being manually or by mechanical means operable to move said piston (201) with said intruding means (262) towards said protruding conduit (13, 14) along inner wall of said hollow body (10) or vice versa to expel or suck liquid from or into said hollow body (10) through said needle (44) or said catheter (63) therein respectively, wherein if upon injection, said intruding means (262) being penetrated through said rubber slip tip (50) to block against said nozzle lumen (56) therein for engaging said plunger (20) to said needle carrier (40) upon fully depressing said plunger (20) whereby allowing said needle carrier (40) to enter into said hollow body (10) upon withdrawal of said plunger (20), a tag (231 ) supported by a weak base (232) is cast on the midway of said shaft (22) to keep said intruding means (262) safe from being engaged with said rubber slip tip (50) whereby reminding the user upon drawing up medication and the body of said tag (231) also can be depressed downwards horizontally entering into said hollow body (10) upon injection, said shaft (22) also includes a fragile portion (24) adjacent said piston (201) at other end allowing said shaft (22) to break whereby retaining said needle carrier (40) inside said hollow body (10).

2. A multi-med-uses retractable non-reusable syringe according to claim 1 wherein said pump means located at the lower portion of said protruding conduit (14) of said hollow body (10) is one or a plurality of female screwed threads or ridges (141) acting as the first part thereof being locked with said male screwed flanges or threads ( 1) of said catheter cap (60), and said rubber slip tip (50) acting as the second part of pump means, being fixed at the upper portion of said protruding conduit (13) of said hollow body (10) mounted within hollow centre of said catheter cap (60) of catheter (63) therein.

3. A multi-med-uses retractable non-reusable syringe according to claim 2 wherein each of said female screwed threads or ridges (141) is one which spirally runs round the inner wall of the lower portion of said protruding conduit (14) terminating at a notch base ( 15) therein.

4. A multi-med-uses retractable non-reusable syringe according to claim 2 wherein one or a plurality of tip seals (51, 53) of said rubber slip tip (50) fixed properly against one or a plurality of lateral notches (131) at the upper portion of said protruding conduit (13) therein.

5. A multi-med-uses retractable non-reusable Syringe according to claim 2 wherein material's hardness of said rubber slip tip (50) is over 65 degrees.

6. A multi-med-uses retractable non-reusable syringe according to claim 1 wherein said intruding means (262) located at one end of said shaft (22) is an arrow-shaped tip (262) pointing ahead wherein one or a plurality of small isolated gap (263) disposed at the central position therein to form at least a couple of tip caps (264).

7. A multi-med-uses retractable non-reusable syringe according to claim 1 wherein said tag (231) is an outward projected abdomen-shaped body facing ahead toward said piston (201) supported with said weak base (232) in the midway of said shaft (22).

8. A multi-med-uses retractable non-reusable syringe according to claim 7 wherein said outward projected abdomen-shaped body of tag (231) declining in projecting thickness from its midway up to its peak therein.

9. A multi-med-uses retractable non-reusable syringe according to claim 1 wherein said round shaped carrier flange (41) is either a thin and narrow layer of flange projected outward circumferentially at the external wall of opening end of said needle carrier (40), or a shallow and narrow circumferential undercut on the hub of said needle carrier (40) adjacent the opening end whereby forming said round shaped carrier flange (41) looked like therein.