CN110448761A - An indwelling needle with a safety device - Google Patents

Abstract

The present invention relates to vascular puncture medical instruments fields, more particularly to a kind of fool proof remaining needle of band, including indwelling needle assembly and safety device, it is characterized in that, the safety device includes safety trocar, described safety trocar one end matches with indwelling needle assembly, the safety trocar other end is connected with the detachable helmet of one end sealing, the Paracentesis needle holder that can be slided along safety trocar inner wall is equipped in safety trocar, the Paracentesis needle holder is fixed with puncture needle close to indwelling needle assembly one end, the Paracentesis needle holder other end is equipped with the block that diameter is greater than Paracentesis needle holder diameter, Paracentesis needle holder outer sheath is equipped with spring, the spring one end and safety trocar inner wall are close to indwelling needle assembly end thereof contacts, the spring other end is contacted with block.For the present invention after puncture needle takes out human body, puncture needle can be taken in safety device by a key, be avoided due to fault and accident caused by stabbing, while elastic plug is equipped in flexible tube base, play the role of sealing of only overflowing automatically after the withdraw of the needle, it is not necessary that sealing operation is repeated.

Description

An indwelling needle with a safety device

technical field

The invention relates to the field of blood vessel puncture medical equipment, in particular to an indwelling needle with a safety device.

Background technique

Indwelling needles are increasingly used clinically, and are often used for infusion of critically ill patients, advanced cancer, and patients with difficult punctures; however, during clinical use of indwelling needles, when medical staff withdraw the needle after successful puncture, the needle is not protected and often does not Be careful that you will be stabbed by the needle tip. The diseases infected by needlestick injuries are mainly hepatitis and AIDS, which seriously threaten the physical and mental health of medical staff. At the same time, it is necessary to repeatedly flush and seal the tube during infusion, which not only has a large workload, but also causes certain hidden dangers to the health of medical staff and patients.

Contents of the invention

In order to overcome the above-mentioned problems, the present invention provides an indwelling needle with a safety device. After the puncture needle is taken out of the human body, the puncture needle can be put into the safety device with one key, so as to avoid accidents caused by mistakes and stab wounds. At the same time, the hose There is an elastic plug in the seat, which automatically plays the role of anti-spill sealing after the needle is withdrawn, without repeated sealing operations.

The present invention is achieved through the following technical solutions:

An indwelling needle with a safety device, including an indwelling needle assembly and a safety device, is characterized in that the safety device includes a safety sleeve, one end of the safety sleeve is matched with the indwelling needle assembly, and the other end of the safety sleeve is connected with an end seal A detachable safety cap, the safety sleeve is provided with a puncture needle seat that can slide along the inner wall of the safety sleeve, a puncture needle is fixed at one end of the puncture needle seat close to the indwelling needle assembly, and a diameter larger than the diameter of the puncture needle seat is provided at the other end of the puncture needle seat a stopper, a spring is sheathed on the outside of the puncture needle seat, one end of the spring is in contact with the inner wall of the safety sleeve close to the end of the indwelling needle assembly, and the other end of the spring is in contact with the stopper;

It also includes a switch, a part of the switch is arranged on the outer wall of the safety sleeve, and the other part is arranged inside the safety sleeve through the first switch through hole arranged on the wall of the safety sleeve and contacts with the stopper at one end of the puncture needle holder;

Wherein, the switch is provided with a through hole inside the safety sleeve, and the inner diameter of the through hole is larger than the outer diameter of the stopper at one end of the puncture needle tube;

Wherein, the through hole is not aligned with the stopper at one end of the puncture needle tube;

Wherein, a shrapnel is provided between the part of the switch arranged on the outer wall of the safety sleeve and the outer wall of the safety sleeve;

Wherein, a connecting bridge is provided in the first switch through hole;

Wherein, the connecting bridge cooperates with the switch;

Wherein, the outer wall of the safety sleeve is provided with anti-slip lines;

Wherein, the length of the safety sleeve is greater than the length of the puncture needle;

Wherein, the indwelling needle assembly includes a hose holder and a needle sheath, the needle sheath is arranged at one end of the hose holder and is detachably connected with the hose holder, an elastic plug is provided inside the hose holder, and the elastic plug The head is a hollow structure closed on one side. There is a central hole in the middle of one closed end. The central hole is in a closed state by being squeezed by the surrounding elastic material. A hollow guide core is provided inside the elastic plug. The guide core, the central hole and the The hose seats are located on the same central axis;

One end of the hose holder is connected to the hose, the hose is placed inside the needle sheath, the other end of the hose holder is matched with the safety sleeve, and the puncture needle passes through the guide core and the elastic plug sequentially along the axis of the hose holder. Pass through the hose seat and place it in the hose;

Wherein, the hose seat is provided with a side hole seat, and the side hole seat communicates with the hose seat, and the connection point is set on the side of the elastic plug close to the hose, and a conduit is connected to one side of the side hole seat, and one end of the conduit is connected to There is a positive pressure tee, and the other two openings of the positive pressure tee are respectively provided with a heparin cap and an end cap, and a stop clip is provided on the outside of the catheter.

The beneficial effects of the present invention are: (1) a safety device is provided, and after the puncture needle is taken out of the human body, the puncture needle can be put into the safety device with one key, so as to avoid accidents caused by mistakes; It is equipped with an elastic plug, which plays the role of anti-spill sealing, and does not need to be sealed again; (3) The elastic plug is reversible, and can be directly used for infusion or blood drawing, without repeated sealing operations. (4) The safety device adopts a condom The tube and the safety helmet have a separate structure, the internal structure is simple and detachable, and the assembly is convenient, which is convenient for production; (5) The switch is fixed with a connecting bridge as a safety device, which can prevent misoperation.

Description of drawings

Fig. 1 is a longitudinal sectional structure diagram of the present application.

Fig. 2 is a three-dimensional structure diagram of the present application.

Fig. 3 is an enlarged cross-sectional view A of the present application.

Fig. 4 is an enlarged cross-sectional view B of the present application.

Fig. 5 is a transverse cross-sectional structure diagram of the switch position of the present application.

FIG. 6 is a three-dimensional structure view of Embodiment 2. FIG.

In the figure, 1. puncture needle, 2. guide core, 3. puncture needle seat, 4. switch, 5. safety sleeve, 6. needle sheath, 7. hose, 8. hose seat, 9. center hole, 10. Elastic plug, 11. Spring, 12. Safety cap, 13. Gap, 14. Needle seat through hole, 15. Connecting bridge, 16. Block, 17. Second switch through hole, 18. Connecting column, 19 , the first switch through hole, 20, anti-slip pattern, 21, catheter, 22, side hole seat, 23, end cap, 24, heparin cap, 25, positive pressure tee, 26, stop clip, 27, shrapnel.

Detailed ways

The following is a further description of the present invention in conjunction with the accompanying drawings and embodiments.

Example 1

As shown in Figures 1 to 5, an indwelling needle with a safety device is composed of an indwelling needle assembly and a safety device. The indwelling needle assembly includes a hose seat 8 and a needle sheath 6, and the needle sheath 6 is located on One end of the hose seat 8 is detachably connected to the hose seat 8. The hose seat is provided with an elastic plug 10, which is usually made of elastic materials such as rubber. The elastic plug 10 is hollow inside and closed at one end. The cylindrical structure has a small central hole 9 in the middle of one closed end. When the central hole 9 is in a normal state, it is closed due to the extrusion of the surrounding elastic material. The inner space of the elastic plug 10 is equipped with a hard Guide core 2, the guide core 2 is a hollow structure, the shape of the outer diameter matches the inner space of the elastic plug 10, the guide core 2, the central hole 9 and the hose seat 8 are located on the same central axis. One end of the hose holder 8 is connected with the hose 7, and the hose 7 is placed inside the needle sheath 6, and the other end of the hose holder 8 is matched with the safety device.

The safety device includes a safety sleeve 5, one end of the safety sleeve 5 can be installed in cooperation with the hose seat 8, and the end of the safety sleeve 5 can be matched to be inserted into the hose seat 8, which is convenient for installation and needle withdrawal, such as clamping, screwing Then, the other end is generally connected to a detachable safety cap 12 that is sealed at one end, and the safety cap can be selectively screwed to the end of the safety sleeve 5 . The interior of the safety sleeve 5 is hollow, and there is a puncture needle holder 3 that can slide along the inner wall of the safety sleeve 5. One end of the puncture needle holder 3 is fixedly connected to the puncture needle 1. At one end connected to the tube base 8, the puncture needle 1 protrudes out of the safety sleeve 5 and passes through the guide core 2 and the elastic plug 10 along the axis of the hose base 8, and then passes through the hose base 8 and places it in the hose 7. The core 2 exerts pressure on the closed end of the elastic plug 10 due to pressure, and the central hole 9 of the elastic plug 10 is opened under pressure to allow the puncture needle 1 to pass through. The other end of the puncture needle base 3 is provided with a protruding stopper 16, and the diameter of the stopper 16 is larger than the diameter of the puncture needle base 3; One end close to the indwelling needle assembly is in contact, and the other end of the spring 11 is in contact with the protruding stopper 16. In general, when the puncture needle holder 3 is located at the end connected to the hose holder 8 in the safety sleeve 5, the spring 11 is squeezed by the stopper 16 while in a compressed state.

A first switch through hole 19 is opened on the outer wall of the safety sleeve 5 close to the end of the indwelling needle assembly. The position of the first switch through hole 19 is located on one side of the puncture needle seat stopper 16, and is matched with the position of one end of the stopper 16 in the normal state. , to ensure that the switch 4 can be in contact with the puncture needle base 3 to block the movement of the puncture needle base 3; a second switch through hole 17 is opened at a position symmetrical to the first switch through hole 19 to ensure that there is enough space for the The switch 4 is pressed in, and a fixed connection column 18 is provided in the middle of the second switch through hole 17 . Switch 4 generally has an L-shaped structure. One end of switch 4 is placed close to the outer wall of safety sleeve 5, which is called the pressing end. There is a gap between the pressing end and the outer wall of safety sleeve 5, and a shrapnel 27 is connected in the gap to ensure that the pressing end does not It will be depressed due to accidental touch; the other end of the switch passes through the first switch through hole 19 and is placed inside the safety sleeve 5, which is called the blocking end; The blocking end hinders the end that is fixed in the safety sleeve 5 and connected with the hose seat 8, and the spring is in a compressed state at this moment. The middle part of the blocking end of the switch 4 is provided with a needle holder through hole 14, and the inner diameter of the needle holder through hole 14 is larger than the outer diameter of the stopper 16 at one end of the puncture needle holder, so as to ensure that the puncture needle holder 3 can pass through the needle holder 14 through hole. The end of the blocking end away from the pressing end is provided with a notch 13 communicating with the through hole 14 of the needle holder, and a breakable connecting bridge 15 is provided on both sides of the connecting notch 13, and the position of the connecting bridge 15 is in alignment with the position of the connecting post 18. When in the normal state, the switch 4 is not triggered, the needle seat through hole 14 is not aligned with the stopper 16, and the blocking end is in contact with the stopper 16 inside the safety sleeve 5 to block the movement of the puncture needle seat 3. At this time, the connecting bridge 15 is blocked. The connection column 18 blocks, the switch 4 cannot move into the second switch through hole 17, even if it is accidentally touched due to misoperation, the switch will not be triggered, as a safety device; when in use, the pressing end of the switch 4 can be broken due to the connection bridge 15 , the connection bridge 15 is broken by the extrusion of the connection column 18 under the action of pressure, and the connection column 18 will not prevent the switch 5 from moving into the second switch through hole 17 due to the existence of the gap 13 until the needle seat through hole 14 is aligned with the stopper 16 , the puncture needle base 3 is moved by the action of the spring 11 through the needle base through hole 14 to one end of the safety cap 12 in the safety sleeve 5, and after the spring 11 completely restores its shape, the puncture needle base 3 is in the safety cap 12, and the puncture needle 1 is completely In the safety sleeve 5.

The outer side of the safety sleeve 5 is generally provided with anti-skid lines 20 to enhance friction and reduce misuse.

When in use, remove the needle sheath 6, hold the hose holder 8 for normal puncture, after the puncture is completed, separate the safety sleeve 5 from the hose holder 8, remove the puncture needle 1 from the human body, and leave the hose 7 in the human body. In the body, after the puncture needle 1 leaves the human body completely, press the pressing end of the switch 4, the connecting column 18 will cut off the connecting bridge 15 under pressure, the connecting column can pass through the gap 13, the switch loses the blocking of the connecting column 18, and can pass to the second switch. The hole 17 moves until the needle seat through hole 14 at the blocking end of the switch is aligned with the puncture needle seat 3, the puncture needle seat 3 is bounced into the safety cap 12 by the spring, and the puncture needle 1 is received in the safety sleeve 5 to prevent accidents caused by the puncture; After the needle 1 withdraws from the hose seat 8, the elastic plug 10 loses its pressure and recovers its shape, and squeezes the central hole 9 to close, without additional sealing operation. Once the operation is complete, the safety device is ready for disposal as medical waste. If operations such as infusion or blood drawing are needed, only need to insert the needle into the guide core 2 to open the central hole 9 of the elastic plug 10, and the central hole 9 will be automatically closed when the needle is withdrawn to prevent bleeding, which is simple and quick.

Example 2

As shown in Figure 6, an indwelling needle with a safety device is composed of an indwelling needle assembly and a safety device. The indwelling needle assembly includes a hose holder 8 and a needle sheath 6, and the needle sheath 6 is arranged on the hose holder 8 is detachably connected to the hose seat 8. The hose seat is provided with an elastic plug 10. The elastic plug 10 is usually made of elastic materials such as rubber. The elastic plug 10 is cylindrical with a hollow interior and a closed end. A small central hole 9 is opened in the middle of one closed end. In the normal state, the central hole 9 is closed due to the extrusion of the surrounding elastic material. The inner space of the elastic plug 10 is equipped with a hard guide core. 2. The guide core 2 is a hollow structure, and the shape of the outer diameter matches the inner space of the elastic plug 10. The guide core 2, the central hole 9 and the hose seat 8 are located on the same central axis. One end of the hose holder 8 is connected with the hose 7, and the hose 7 is placed inside the needle sheath 6, and the other end of the hose holder 8 is matched with the safety device. The hose seat 8 is a Y-shaped three-way structure. A side hole seat 22 is provided on the side of the elastic plug 10 close to the hose 7. A conduit 21 is connected to one side of the side hole seat 22. One end of the conduit 21 is connected to a positive pressure three-way A heparin cap 24 and an end cap 23 are respectively provided at the other two ports of the positive pressure tee 25 and the positive pressure tee 25 , and a stop clip 26 is provided on the outside of the catheter 21 .

The safety device is as described in Embodiment 1, the safety sleeve 5 is connected to the straight-through end of the hose seat 8, and the puncture needle 1 passes through the guide core 2, the elastic plug 10 and the hose seat 8 sequentially as described in Embodiment 1 and extends into the soft tube. Tube 7 inside.

When in use, remove the needle sheath 6 and perform normal puncture. After the puncture is completed, separate the safety sleeve 5 from the hose seat 8 and remove it. The puncture needle 1 is withdrawn from the human body, and the hose 7 is left in the human body. 1 After leaving the human body completely, press the pressing end of the switch 4, and the connecting column 18 will cut off the connecting bridge 15 upon receiving the pressure, the connecting column can pass through the gap 13, the switch loses the blocking of the connecting column 18, and can move to the second switch through hole 17, Until the needle seat through hole 14 at the blocking end of the switch is aligned with the puncture needle seat 3, the puncture needle seat 3 is bounced into the safety cap 12 by the spring, and the puncture needle 1 is stored in the safety sleeve 5 to prevent accidents caused by stab wounds; at the same time, the puncture needle 1 exits the soft After the pipe seat 8, the elastic plug 10 loses its pressure recovery shape, squeezes and closes the central hole 9, and no additional pipe sealing operation is required. During the infusion operation, the infusion can be carried out from the positive pressure tee 25 according to the operation of the ordinary Y-shaped indwelling needle. Easy and fast.

Claims (9)

1. An indwelling needle with a safety device, comprising an indwelling needle assembly and a safety device, characterized in that the safety device includes a safety sleeve, one end of the safety sleeve matches the indwelling needle assembly, and the other end of the safety sleeve is connected with a A detachable safety cap with one end sealed. A puncture needle seat that can slide along the inner wall of the safety sleeve is provided in the safety sleeve. A puncture needle is fixed at one end of the puncture needle seat close to the indwelling needle assembly. A spring is sheathed outside the needle seat, one end of the spring is in contact with the inner wall of the safety sleeve close to the end of the indwelling needle assembly, and the other end of the spring is in contact with the stopper; A switch is also included, a part of the switch is arranged on the outer wall of the safety sleeve, and the other part is arranged inside the safety sleeve through a first switch through hole arranged on the wall of the safety sleeve and contacts with a stopper at one end of the puncture needle seat. 2. An indwelling needle with a safety device according to claim 1, wherein the switch is provided with a through hole inside the safety sleeve, and the inner diameter of the through hole is larger than the stopper at one end of the puncture needle tube. The outer diameter of the block. 3 . The indwelling needle with a safety device according to claim 2 , wherein the through hole is not aligned with the stopper at one end of the puncture needle tube. 4 . 4 . The indwelling needle with a safety device according to claim 2 or 3 , wherein a gap is provided on the side of the through hole away from the through hole of the first switch, and a connecting bridge is provided in the gap. 5. An indwelling needle with a safety device according to claim 4, wherein a second switch through hole is provided on the side of the wall of the safety sleeve that is symmetrical to the first switch through hole, and the second switch through hole A connecting column is fixedly arranged in the middle of the hole, and the connecting column is in contact with the connecting bridge. 6 . The indwelling needle with a safety device according to claim 1 , wherein an anti-slip pattern is provided on the outer wall of the safety sleeve. 7 . The indwelling needle with a safety device according to claim 1 , wherein the length of the safety sleeve is longer than the length of the puncture needle. 8. An indwelling needle with a safety device according to claim 1, wherein the indwelling needle assembly comprises a hose seat and a needle sheath, and the needle sheath is arranged at one end of the hose seat and is connected to the soft The pipe seat is detachably connected, and an elastic plug is provided inside the hose seat. The elastic plug is a hollow structure closed on one side, and a central hole is opened in the middle of one closed end. The central hole is squeezed by the surrounding elastic material and is in a In the closed state, the outer diameter of the elastic plug matches the inner diameter of the hose seat, and a hollow guide core is arranged inside the elastic plug, and the guide core, the central hole and the hose seat are located on the same central axis; One end of the hose holder is connected to the hose, the hose is placed inside the needle sheath, the other end of the hose holder is matched with the safety sleeve, and the puncture needle passes through the guide core and the elastic plug sequentially along the axis of the hose holder. Pass out the hose seat and place it in the hose. 9. An indwelling needle with a safety device according to claim 8, wherein the hose seat is provided with a side hole seat, and the side hole seat communicates with the hose seat, and the connection point is set at the elastic plug The head is close to the side of the hose, the side of the side hole seat is connected with a catheter, one end of the catheter is connected with a positive pressure tee, and the other two ports of the positive pressure tee are respectively provided with a heparin cap and an end cap. There is also a stop clip.