GB2279570A

GB2279570A - Vein needle set

Info

Publication number: GB2279570A
Application number: GB9410676A
Authority: GB
Inventors: Kyung Jin Song; Young Sik Song; Jerng Sik Song; Joong Sik Song
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-27
Filing date: 1994-05-27
Publication date: 1995-01-11
Also published as: GB9410676D0

Abstract

The set comprises a cylinder 8 having a vein insertion tube 9 and a transfusion line connector 3 into which an injectant line connector 16 is inserted, a transparent film shield 2 fixed to the connector 3 and to the bottom of the cylinder and a piston 4 fixed to a needle 7 and mounted at the centre of the non-collapsed shield. The piston also has a knob 6 which protrudes through a slot 10 in the cylinder wall for sliding motion therein. The shield may be attached only to the lower side of the piston, the upper side of which is then attached to a sliding flexible tube (20 - Fig. 11) carrying the connector 3. In variants, (a) the needle is carried by a cylinder joined to a connector by an outwardly deformable or collapsible shield (Figs. 17, 19) or (b) a needle-carrying cylinder with an internal plunger is mounted inside a protective cylinder (Fig. 23). An internal rubber cap for prevention of needle stick may be included in such cylinder. <IMAGE>

Description

HYPODERMIC NEEDLE APPARATUS The present invention relates to a hypodermic needle apparatus.

Fig. 1 : Shows overall view of reversible resin needel set of this invention in use. (Practice ex.l) Fig. 2 : Shows disassembled parts of this invention.

(Practice ex.1) Fig. 3 : Shows sectional view of assembled resin needle with the metal needle advanced position of this invention.

(Practice ex.1) Fig. 4 : Shows sectional view of the flow of injectant supply when the metal needle is in the backward position of this invention.(Practice ex.1) Fig. 5 : Shows sectional view of the vein resin needle of this invention in operation.(Practice ex.l) Fig. 6 : Shows sectional view of cylinder of this invention.

(Practice ex.l) Fig. 7 : Shows sectional view of line A-A in Figh.3 of this invention.

Fig. 8 : Shows sectional view of line B-B in Fig.3 of this invention.

Fig. 9 : Shows enlarged view of A portion(Fig.4) of this invention.

Fig. 10 : Shows the view of disassembled internal parts of this invention. (Practice ex.2) Fig. 11 : Shows sectinal view of practice ex.2 after the metal needle is backed.(Praceice ex.2) Fig. 12 : Shows sectinal view of assembled resin needle with the metal needle advanced position of this invention.

(Practice ex.2) Fig. 13 : Shows sectinal view of assembled resin needle with the - metal neddle advanced Position of this inventionS (Practice ex.3) Fig. 14 : Shows sectional view of practice ex.3 of this invention after the metal needle is backed.

Fig. 15 : Shows overall view of practice ex.4 of this invention in use.

Fig. 16 : Shows disassembled view of connecting cylindrical film shield of this invention.(Practice ex.4) Fig. 17 : Shows sectional view of assembled resin needle with the metal needle advanced position of this invention.

(Practice ex.4) Fig. 18 : Shows sectional view of practice ex.4 of this invention after the metal needle is backed.

Fig. 19 : Shows sectional view of assembled resin needle with the metal needle advanced position of this invention.

(Practice ex.5) Fig. 20 : Shows sectional view of practice ex.5 of this invention after the metal needle is backed.

Fig. 21 : Shows overall view of practice ex.6 of this invention in use.

Fig. 22 : Shows disassembled view of practice ex.6 of this invention.

Fig. 23 : Shows sectional view of assembled resin needle with the metal needle advanced position of this invention.

(Practice ex.5) Fig. 24 : Shows sectional view of practice ex.6 of this invention after the metal needel is backed.

Fig. 25 : Shows sectional view of assembled resin needle with the metal needel advanced position of this invention.

(Practice ex.7) Fig. 26 : Shows sectional view of usual existig resin needle.

* Explanation of component parts numbered on Fig.s 1 : Resin Needel set 2, 2': Cylindrical film shield 3 : Transfusion line connector 4 : Piston 4a : Injectant passing hole 5 : Connecting rod 6 : Knob 7 : Metal needle 8 : Cylinder 8a, 8b : Concave groove 9 : Resin tube 10 : Sliding groove lOa, lOb : Stopper 11 : Needle hole 12 : Injectant supply hole 13 Injectant container 14 : Injectant regulator 15 : Injectant line 16 : Connector 17 : Triangular cavity 18 : Vent hole 20 : Flexible tuble 21,22,23,24 : Protusion 25 : stop 30 : Resin cylinder 31, 33 : Elastic body 32 : Connector 34 : Needle cylinder 36 : Cap 40: Protective cylinder 41 : Small passage 42 : Female nut 43 : Inside cylinder 44 : Male nut 45 : Plunger 46 : Rubbler cap This invention is related to reversibel vein resin needle for one time use that is designed to transfuse blood or injections into vein by backing the metal needle but not by discarding it when the resin needle is being pricked into vein.

The vein resin needle generally used these days as illustrated in Fig.26 is pricked into vein together with a metal needle(80) and then is connected to the connector(82) of injectant line above the holder(82) after removing the metal needle(80).

Since the vein resin tube(81) has to be connected to the holder(82) and then to the injectant line immediately after removing the metal needle(80) from vein, this method has the defect of leaking blood from vein through the resin tube in the process of making the connections.

The connection process is not only inconvenient but also uneconomical since the resin tube should be replaced with new one when the tube is to be pricked into other vein of the same patient since the metal needle(80) is removed.

While making the connection to injectant line, the exposed metal needle(80) may become the source of prick wound that nay infect others with virus.

Espercially, in the event of injecting the injectant into the vein of unknown AIDS patient, the metal needle removed from the vein, there is a serious problem that infect the handlers with AIDS virus.

Therefore, the aimes fo this invention are; .

Firstly, to make a faster injection of blood or injectant by using metal needle/resin tube by simply moving the metal needle backwards to clear the passage of the resin tube, Secondly, to enable the metal needle/resin tube to prick it into other vein continueously only by moving the metal needle back into the resin tube without using a new one.

Thirdly, and to provide all personnel concerned such as doctors, nurses, etc. with infection-free reversible vein resin needle for one time use by eliminating the sources of prick wound by the exposed metal needle.

This invention as stated above makes the vein injection easier and movable from one vein to another of same patient repeatedly without using a new resin needle set, and has the feature that prevents the patient and the needle handling people from being infected by virus.

Detailed explanations of each practice ex.1 of this invention follow per the attached drawings.

Fig.s 1 thru 9 illustrate the practice ex.1 of this invention.

The injectant line(15) is connected to the injectant container(13), and the injectant regulator(14) is installed at the lower part of the injectant line(l5). and the connector(16) is connected to the lower end of the injectant line(15).

Upper end of the transparent Cylindrical film Shield(2) is closed and fixed to the transfusion line connector(3) where the connector(16) is to be inserted, and the lower end of the cylindrical Shield(2) is closed and fixed from the outside of injectant Supply hole(12) to the lower end of the Cylinder(8), and the resin tube(9) of tixed length is installed at the lower end of the Cylinder(8).

Also, the triangular cavily(l7) is installed at the lower end of the cylinder(8), and the metal needle(7) is holed as Vent hole(8) to allow the metal needle(7) to locate at the lower end of the triangular cavity(17) when the metal needle(7) reaches the point of its lower stroke.

The cylinder(8) is made of transparent of semi-transparent material.

Install a sliding groove(10) on one side of the cylinder(8) from its upper part to the lower part, and then make a protrusion or a stopper(l0a) on the upper part and another stopper(lOb) on the lower part.

Instal injectant supply holes(12) vertically at the connecting spot of the cylinder(8) and the resin tube(9), and then install a needle hole(11) through which the metal needle(7) passes in the center of the spot.

The piston(4) that is fixed on the center of the transparent cylindrical film shield and is moving up and down in the cylinder(8) is fixed to the metal needle(7).

After forming two injectant passing holes(4a) on both sides of the piston(4), assemble the connecting rod(5) of the knob(6) to the piston(4) through the sliding groove(10) from the outside of the cylinder(8).

And, the transparent cylindrical film abield(2) is fixed to the outside of the piston(4) to make the two as one unit.

Now, the detailed eplanation on the peration and the effect of ex.1 of this invention follows; Make the blood or injectant in the injectant container(l3) flow by loosing the injectant regulator(14) after inserting the connector(16) extended from the injectant line(15) into the transfusion line connector(3).

Then the blood or injectant in the injectant container(l3) can be supplied to the cylindrical film shield(2) in the cylinder(8) through the injectant regulator(14) and the injectant line(15).

At this time, the piston(4) is located at the lower part of the cylinder(8) as shown on Fig. 3, and the metal needle(7) is protruded about 1-2mm beyond the lower end of resin tube(9).

Hold the cylinder(8) together with the knob(6) and prick the metal needle(7) into the vein of desired spot correctly, then the blood in the vein flows reversely through the metal needle(7).

Make sure that the metal needle(7) is pricked correctly in vein by seeing reverse flow of blood.

And then, hold the knob(6) and move it to the direction of C as illustrated in the Fig.s 4 and 5, then the connecting rob(5) pushes the piston(4) upward led by the sliding groove(10).

When the metal needle(7) is located in the resin tube, the injectant supply is made through the metal needle(7) only since the resin tube(9) is blocked by the metal needle(7).

The connecting rod(5) moving upward comes to stop at the stopper(l0a) of the sliding groove(10), and it is the upper stroke point of the piston(4).

At this point the end of metal needle(7) is located at the needle hole(ll), and the injectant in the cylinder(8) is injected into the vein passing through the injectant supply hole(12) and the resin tube(9).

The triangular cavity(17) of the resin needle set(1) is supplied with blood or injectant through the injectant suppply hole(12) and the cylinder(8).

The blood or the injectant supplied into the triangular cavity(17) can be transfused into the vein without letting the air in the cavity(17) flow into the vein since the air exhausts through the vent hole(lB) that was finely processed by laser beam or a grinder.

Now the injectant is supplied to the cylindrical film shield(2) in the cylinder(8) through the injectant line(15), and then the blood or the injectant flows downwared through the injectant passing holes(4a) of the piston(4) since the cylindrical film shield(2) is fixed to upper and lower parts of the cylinder(8).

The length of the cylindrical film shield(2) is about double length of the cylinder(8), and the cylindrical fili shield(2) folds like a bellows as the piston(4) moves up and down.

In case of relocating the resin needle set(l) from one vein to another for continuous transfusion while the resin need set(1) is used, stop supply of blood or injectant by the injectant regulatror(14), move the knob(6) toward "D" direction after the resin tube(9) is removed from the vein, then the connecting rod(5) pushes the piston(4) down to the point of its lower stroke by overcoming the stopper(l0b) of the sliding groove(10), and reposition the metal needle(7) to the original position.

At this time, with the repositioned metal needle(7), the transfusion can be mead at other vein of the same patient.

Terefore, when the continuous injections are required for a patient, this resin needle set(l) makes the injection from one vein to another of the same parient promptly and continuously without discarding the resin needle set(l).

Since the cylindrical film shield(2) housed in the cylinder(8) is shut off from outside, and the piston(4) is wrapped and fixed to the shield(2), it is prevented from permiation of virus from outside even when the piston(4) moves.

The points of upper and lower strokes of the piston(4) is determined by stoppers(10a)(10b) of the sliding groove(10), and the moving positions of the metal needle(7) are also deterained by the strokes, and the metal needle(7) is shut off from outside virus by the cylindrical film shield(2), the metal needle(7) can be ruturned and protruded out into the resin tube(9) after removed from the tube(9).

Therefore, the resin needle set(1) makes possible to inject into one vein to another immediately.

Fig.s 10 thru 12 illustrate the practice ex.2 of this invention.

Lower sides of the piston(4) having holes(4a) and the cylinder(8) are connected to the upper and lower portions of the cylindrical film shield(2), and upper side of the piston(4) is connected to the fiexible tube(20) of the transfusion line connector(3).

The protrusions(21)(22) are formed on upper and lower portions of the flexible tube(20), and are fitted in the concave groove(8a) of the cylinder(8).

With the structure of practice ex.2 of this invention, hold the knob(6) and push the piston(4) downward, then the cylindrical film shiedl(2) is folded like a bellows as shown in Fig.12, and the flexible tube(20) on upper part of the piston(4) is inserted into the cylinder(8), and the upper protrusion(21) is fitted in the concave groove(8a) formed upper inside of the cylinder(8) making the metal needle(7) and the resin tube(9) immediately ready for the position of pricking then into the vein.

Moving the piston(4) upwards with the knob(6) after the metal needle(7) and the resin tube(9) are pricked into the vein, then the folded cylindrical film shield(2) is stretched as illustrated in Fig.11, and the protrusion(21) is released from the concave groove(8a) and the flexible tube(20) is released from the cylinder(8), and the lower protrusion(22) of the flexible tube(20) is so fitted in the concave groove(8a) of the cylinder(8) that the flexible tube(20) and the piston(4) are prevented from natural falling.

Fig.s 13 and 14 show another practice ex. of this invention.

The cylinder(8) is formed in complete pound.

In case of moving the piston(4) back and forth during injection, hold the transfusion line connector(3') linked to the end of the flexible tube(20) and push or pull the connector(3').

When the piston(4) is completely pulled up, the protrusion(23) formed upper inside of the cylinder(8) is fitted in the concave groove(8b) of the piston(4), therefore, the piston(4) becomes immovable, and, when the piston(4) is completely pushed down, the protrusion(24) formed at the lower inside of the cylinder(8) is fitted in the concave groove(8b) of the piston(4), so the piston(4) again becomes immovable.

The numer 25 is a stopping protrusion.

The flexible tube(20) should have propper hardness not to be crushed when the piston(4) is pushing down or pulling up by the transfusion line connector(3').

Fig.s 15 thru 18 illustrate the practice ex.3 of this invention.

One side of the resin cylinder(30) of the injectant container(13) and the resin needle set(1) is connected to the injectant line linked up to the injectant regulator(14), and the connector(32) is screwed in other side of the resin cylinder(30) of the resin needle set(1) in which the elastic body(33) is inserted, and the needle cylinder(34) equiped with the metal needle(7) and the connector(32) are assembled to the cylindrical film shield(2), and the metal needle(7) having -a vent hole(18) is protruded beyond the resin tube(9) penetrating the elastic material of the connector(32) and the same of the resin cylinder(30).

The practice ex.3 of this invention is composed as above.

When making an injection of blood or injectant, remove the connector(32) from the resin cylinder(30) of the resin needle set(1), and inject the injectant by adjusting its flow speed by the injectant regulator(14) linked to the injectant line(15) connecting the injectant container(13) and the resin cylinder(30).

That is, when making an injection of blood or injectant, inject the injectant into vein with the metal needle(7) protruded beyond the resin tube(9) as illustratted, and locate the lower tip of the metal needle(7) to the center of the elastic material(32) in the connector(32) by pulling up the needle cylinder(34) as shown in Fig. 18 after connecting the injectant line(15) to one side of the resin cylinder(30), then the blood or injectant in the injectant container(13) is injected into vein through the injectant line(15) and the resin cylinder(30).

And also, locate the lower tip of the metal needle(7) in the center of the elastic body(33) of the connector(32) as illustrated in Fig.18, and remove the connector(32) that is secrewed in the resin cylinder(30). then blood or injectant can be transfused into vein without inflow of air and without outflow of blood or injectant since the elastic material(31) closes the space in which the metal needle(7) is pulled out by the elasticity of the elastic material.

And since the end of the metal needle(7) which is to be pulled out from the resin cylinder(30) is located in the center of the elastic body(33) in the connector(32), various virus infections can be prevented from the prick wound which may caused by the metal needle(7) stained with the blood of a patient.

The Fig.s 19 and 20 illustrate the practice ex.4 of this invention.

The cylindrical film shield(2) is protected from getting dammaged by means of assembling the needle cylinder(34) in which the metal needle(7) is fixed, and the connector(32) in which the resin cylinder(30) is screwed with the cylindrical film shield(2) foldable like a bellows.

That is, by connecting the needle cylinder(34) and the connector(32) to the bellows type cylindrical film shield(2), it(2) can be protected from getting dammaged in the position of the resin needle set(1) before its use as shown in Fig. 17.

Fig.s 21 thru 24 illustrate practice ex.5 of this invention.

Screw the protective cylinder(40) which is composed of the small passage(41) and the female nut to the one side of the resin cylinder(30) connecting the injectant line(15) to the other side, and insert the inside cylinder(43) to which the metal needle(7) is attached into the protective cylinder(40), and form the male nut(44) that is screwed in the female nut(42) of the protective cylinder(40), and insert the plunger(45) into the center of the inside cylinder(43).

That is, the protective cylinder(40) is made of synthetic resin.

When the metal needle(7) is removed from the resin tube(9) by pulling up the inside cylinder(43) after the metal needle(7) and the resin tube(9) are pricked into the vein of a patient, blood or injectant can-be injected.

When injecting blood of injectant, screw the cap(36) on the resin cylinder(30) after separating the protective cylinder(40) form the resin cylinder(30), therefore, permeation of virus or backward flow of blood or injectant can surely be prevented by the elastic body(31) of the resin cylinder(30).

And, when picking blood before the injection with the metal needle(7) and the resin utbe(9) pricked into vein, pull the plunger(45) inserted in the center of the inside cylinder(43), then the blood is picked in the inside cylinder(43) through the metal needle(7) as the air in the inside cylinder(43) expands.

The Fig. 25 illustrates the practice ex. 6 of this invention.

By installing the rubber cap(46) at the small passage(41) of the protective cylinder(40), and when the metal needle(7) is removed from the resin tube(9) and the resin cylinder(30), a doctor or a nurse is protected from being infected with AIDS and hepatitis, etc. from a patient getting hurt by the metal needle(7).

This invention as stated above makes an injection of blood or injectant fast and conveient and protects backfolw of blood when injecting blood or injectant into patient's vein, connect the injectant line to one side of the resin cylinder, and pull out the metal needle after the resin tube is correctly pricked into vein, then, this invention, as stated above, makes the injection faster and convenient and protects backs low of blood as well.

In case of a same patient, when relocating from one vein to another during injection, injection can be made-again by pushing the metal needle forewards, and by pricking it into another vein and by pulling it backwards with no replacement of a new metal needle saving the time required for the replacement and preventing from virus infection.

The metal needle is always protected either in the cylinder or in the connector, and is shielded off from outside by the cylindrical film shield, and is protected from permeation of virus when using the metal needle.

Since the metal needle is discarded with its pulled back position in the cylinder, infection of AIDS or other virus caused by pricking wound by the metal needle can be prevented not like a conventional needle set, and this invention is an epoch-making one.

Claims

1. Hypodermic needle apparatus comprising a transfusion line connector in which a connector of a injectant line is inserted, a cylindrical film shield fixed to the upper and lower parts inside of the cylinder, a piston, fixed to the inside centre of said cylindrical film shield, that has a metal needle protruding downwards and to which a knob is connected by a connecting rod, wherein a reversible vein resin needle set for one time use is provided in which said piston can move up and down and composed of the cylinder in which a resin tube is protruded.

2. Apparatus as claimed in claim 1, wherein the cylindrical film shield is located inside the cylinder.

3. Apparatus as claimed in claim 1, wherein an injectant passing hole is formed in the piston vertically.

4. Apparatus as claimed in claim 1, wherein a sliding groove is provided on one side of the cylinder uprightly, and stoppers are formed at upper and lower parts of the sliding groove, and a needle hole is formed in the centre of the lower part of the cylinder, and two injectant supply holes are formed outside of the needle hole.

5. Apparatus as claimed in claim 1, wherein a triangular cavity is provided underneath the cylinder, and a vent hole is provided at the side of the metal needle at which the hole positions can be in the lower part of the triangular cavity.

6. Apparatus as claimed in claim 1, wherein the piston including injectant passing holes and the lower part of the cylinder are connected to a cylindrical film shield, and the upper part of the piston and the transfusion line connector are connected to a flexible tube, and wherein protrusions are provided on the upper and lower part of the flexible tube which can be received in a concave groove.

7. Apparatus as claimed in claim 1, wherein a concave groove is formed on the piston in which an injectant passing hole is formed, and protrusions are provided on the upper and lower parts of the inside of the cylinder, and the protrusions of the cylinder engage and disengage with the concave groove when the piston moves back and forth.

8. Apparatus as claimed in claim 1, wherein the injectant container and one side of the resin cylinder of the resin needle set are connected by the injectant line connected to the injectant regulator, and the connector is screwed in the other side of the resin cylinder in which the elastic body is inserted, and wherein the needle cylinder and the connector are assembled by the cylindrical film shield, and wherein the metal needle is arranged to protrude out of the resin tube penetrating the elastic body in the connector and the elastic body of the resin cylinder.

9. Apparatus as claimed in claim 7, wherein the needle cylinder equipped with the metal needle and the connector in which the resin cylinder is screwed are formed by a bellows type cylindrical film shield.

10. Apparatus as claimed in claim 7, wherein a small passage and the protective cylinder formed with the female nut are screwed at the other side of the resin cylinder, the male nut is fastened to the female nut of the protective cylinder and the inside cylinder in which the metal needle is assembled into the protective cylinder, and the plunger is inserted into the inside cylinder.

11. Apparatus as claimed in claim 9, wherein a rubber cap is installed at the small passage of the protective cylinder.

12. Hypodermic needle apparatus comprising a first needle member for puncturing skin and arranged to be slidable within a second needle member also for insertion under the skin, the first needle member being slidable between an extended position in which it extends beyond the second needle member and a retracted position in which it is removed from the second needle member so as to allow for a required flow of fluid through said second needle member, wherein engagement means for engaging said first needle is provided to allow for movement thereof between the extended and retracted positions and wherein said engagement means is arranged to engagingly support said first needle means when in said retracted position.

13. Apparatus as claimed in claim 12, wherein said engagement means comprises a piston slidably arranged within a cylinder which extends substantially in the same direction as the second needle member, a first cylindrical bellows member being sealingly connected to one side of said piston and one end of said cylinder, a second cylindrical bellows member being sealingly connected to the other side of said piston and the other end of said cylinder, the piston having an aperture provided therethrough from the one side to the other side so as to allow for fluid communication between the first and second cylindrical bellows members and to said second needle member, and including lug means extending from said piston and through the wall of said cylindrical member to assist movement of said piston and thus said first needle member.

14. Apparatus as claimed in claim 12, wherein said engagement means comprises a piston member being slidably mounted within a cylindrical member extending substantially in the same direction as said second needle member, a tube member being sealingly connected to one side of said piston member and to fluid supply means and a cylindrical bellows member sealingly connected to the other side of said piston member and to an end of said cylindrical member from which said second needle member extends, aperture means being provided in said piston member from one side thereof to the other so as to allow for fluid communication between said tube member and said bellows member and to said second needle member, wherein said tube member is arranged to be moved into, or retracted from, said cylindrical member so as to effect movement of said first needle member between said extended and retracted positions.

15. Apparatus according to claim 12, wherein said engagement means comprises a plunger member arranged to move said first needle member within a housing and into and out of said second needle member via a resealable entry member forming part of the boundary to a fluid passage to said second needle member.

16. Apparatus according to claim 15, wherein said housing comprises a resiliently deformable cylindrical member.

17. Apparatus according to claim 16, wherein said resiliently deformable cylindrical member comprises a cylindrical bellows member.

18. Apparatus according to claim 15, wherein said housing comprises a cylindrical member substantially incompressible along its longitudinal extent and having at least one piston member arranged for reciprocal movement therein.

19. Hypodermic needle apparatus substantially as hereinbefore described with reference to Figs. 1 to 9, 10 to 12, Figs. 13 and 14, Figs. 15 to 18, Figs. 19 and 20 and Figs. 21 to 25 of the accompanying drawings.