CN114053518A - Prevent that acupuncture from hindering vein and keep somewhere needle - Google Patents

Abstract

The invention provides a needle-prick-prevention venous indwelling needle which comprises a tube seat assembly and a needle handle assembly, wherein the needle handle assembly comprises a needle tube and a needle handle, a needle point of the needle tube penetrates out of a sleeve, the tail end of the needle tube is connected with the needle handle, the tube seat assembly comprises a catheter seat and a sleeve, a safety device is arranged at one end, through which the needle point penetrates, of the catheter seat to prevent the needle point from withdrawing, and the sleeve is arranged at one end, through which the needle point penetrates, of the catheter seat. The invention has the beneficial effects that: the invention can reduce the times of repeated puncture, effectively prevent the user from contacting the needle point after the catheter is inserted into the blood vessel of the patient and the needle tube is drawn out of the catheter holder, prevent the user from contacting the residue on the needle point and facilitate the use of medical care personnel.

Description

Prevent that acupuncture from hindering vein and keep somewhere needle

Technical Field

The invention relates to the field of venous indwelling needles, in particular to a venous indwelling needle capable of preventing needle puncture injury.

Background

In the modern society, infusion treatment is a common means of disease treatment, and ordinary infusion needle needs to carry out a puncture to the patient when infusing every time, to the patient that needs to carry out infusion treatment for a long time, this has increased medical personnel's work load undoubtedly, improves medical personnel and has stabbed the risk of infecting, and the painful degree of patient has also been aggravated in the puncture repeatedly simultaneously. To open type be the indwelling needle, whether the blood return cavity that is located the pipe seat appears the blood return and judges that keep somewhere the needle and has penetrated patient's blood vessel through observing, but because the syringe needle of keeping somewhere the needle is far away from the blood return cavity, the time that the blood return flows to the blood return cavity from the syringe needle of keeping somewhere the needle is more than medical personnel and pierces the time that the blood vessel used far away, its result often causes to pierce through blood vessel back wall, need to puncture again, bring meaningless misery for the patient, even pierce patient's blood vessel, medical personnel are difficult to make accurate judgement rapidly, medical personnel's work efficiency has been reduced. The sleeve material of the indwelling needle product on the market at present is FEP mostly, and the patient still has higher probability to suffer from phlebitis in the long-time indwelling use process, so that the pain degree of the patient and the use risk of the indwelling needle are increased.

In recent years, there has been considerable interest in the blood that medical personnel may be exposed to a patient, and it has been recognized that the "blood-exposed needle tip" must be disposed of immediately. This concern is growing because diseases that are not currently treatable, such as Acquired Immune Deficiency Syndrome (AIDS), are emerging and can be transmitted from one infected person to another by exchange of body fluids. Therefore, contact with the body fluids of aids infected persons must be avoided. As mentioned above, if a needle cannula has been used to place an indwelling cannula into a blood vessel of an AIDS infected person, the needle cannula is a vehicle for the delivery of the disease. Such as emergency situations or situations where a contaminated needle stick to medical care personnel is still present due to lack of attention or negligence.

The prior art/product and the defects are as follows:

a) under the condition of needing long-term infusion treatment, the ordinary infusion needle needs to be punctured repeatedly, the workload of medical care personnel is increased, the risk of puncture injury caused by the used needle point is increased, and meanwhile, the patient is also suffered from unnecessary pain.

b) In order to ensure sufficient puncture supporting force of the existing indwelling needle products on the market, the casing pipes of most products are made of relatively hard materials such as FEP materials, the hardness of the materials is not affected by humidity and human body temperature, the hardness of the materials is basically not changed after the materials enter blood vessels, and the probability of phlebitis caused by the fact that the hard casing pipes are left in the blood vessels for a long time is high.

c) The blood return can not be observed quickly when the existing open type indwelling needle product is punctured, so that medical workers are difficult to accurately judge whether the puncture is in place, and finally the puncture is failed.

d) The rear end of the catheter seat of the open type indwelling needle product is directly opened, and the indwelling needle tube is withdrawn more or less after the puncture is successful, so that a small amount of blood of a patient can be brought out, the patient can lose a small amount of blood, the body of medical staff and nearby medical instruments can be polluted by the blood overflowing in the operation process, the probability of spreading infectious diseases is increased, and the health of related staff is seriously threatened.

e) Currently, the mainstream products on the market do not have a safety device for preventing the puncture of the needle tip or only have a safety clip for protecting the user, but do not have a cover or a cover surrounding the safety clip, and although the spring clip can prevent the user from contacting the needle tip of the needle tube, the spring clip can not prevent the user from contacting residual blood on the needle tip, especially when a blood return groove is arranged on the needle tube, so the safety device is still unsafe.

f) Most of the existing mature products of the indwelling needle with the outer cover need additional operation to enable the safety device to function, so that the workload and the operation difficulty of medical staff are increased; in addition, in the process of operating and unlocking the safety device, the indwelling cannula which has been successfully punctured is easy to slide out of the blood vessel, so that puncture failure is caused, and puncture needs to be carried out again, thereby causing pain to patients without fear.

g) The main form of the existing indwelling needle product with a mature safety device capable of being automatically activated (namely, the safety device can automatically play a role while the needle tube is withdrawn) is that an outer cover of the safety device needs to be hung on a catheter seat of the indwelling needle under the action of a safety clip, the safety clip is directly acted on the outer wall of the needle tube by the extrusion force of the catheter seat, and finally the result is that; in addition, in the process of operating and unlocking the safety device, the indwelling cannula which has been successfully punctured is easy to slide out of the blood vessel, so that puncture failure is caused, and puncture needs to be carried out again, thereby causing unnecessary pain to patients.

h) The needle is hindered to preventing on the market at present and is kept somewhere the needle owing to increased the safety device who prevents the acupuncture between needle tubing subassembly and conduit saddle subassembly, and the size of product along the needle tubing direction is longer relatively, and because the reason of fit clearance between each subassembly, leads to the whole range of rocking of needle pipe great when handheld needle handle punctures, causes medical personnel to be difficult to control puncture force and puncture angle, and inconvenient medical personnel use.

Disclosure of Invention

The invention overcomes the defects in the prior art and provides a venous indwelling needle capable of preventing needle stick injury.

The purpose of the invention is realized by the following technical scheme.

The utility model provides a prevent that acupuncture hinders vein and keep somewhere needle, includes tube socket subassembly and needle handle subassembly, the needle handle subassembly includes needle tubing and needle handle, the end of needle tubing with the needle handle is connected, the tube socket subassembly includes pipe seat and sleeve pipe, the needle point of needle tubing is followed the cover intraductal wearing out, the pipe seat confession the one end that the needle point penetrated is equipped with safety device in order to prevent the needle point withdraws from, the pipe seat confession the one end that the needle point wore out is equipped with the sleeve pipe.

Preferably, the sleeve is disposed within the catheter hub by a rivet.

In any of the above schemes, preferably, a rubber isolating plug is arranged in the catheter base, and the outer wall of the isolating plug is tightly attached to the inner wall of the catheter base.

In any of the above schemes, preferably, a gap is formed between the needle tube and the sleeve, and an open slot and a flat structure are sequentially arranged on the side wall of the needle tube close to the needle point.

In any of the above schemes, preferably, the sleeve is of a transparent or semitransparent structure, and the sleeve is made of polyurethane.

It is preferred in any preceding scheme, safety device includes separation blade, needle point protective sheath and prevents back the needle structure, be equipped with the confession on the needle point protective sheath the puncture passageway that the needle tubing passed, the end of penetrating of puncture passageway is equipped with the separation blade, needle point protective sheath inside is equipped with prevents back the needle structure, works as when the needle tubing moves back the needle structure of preventing back the needle structure kick-backs and closes the puncture passageway.

In any of the above schemes, preferably, the blocking piece is provided with a round hole, the round hole is used for the needle tube to pass through, and the diameter of the round hole is smaller than the maximum width of the flat structure, so as to realize the limitation when the needle tube retreats.

In any of the above solutions, it is preferable that the needle-stick-resistant venous indwelling needle according to claim 6, further comprises: prevent back needle structure includes stiff end, kink, opening, barrier plate and free end, the stiff end the kink the barrier plate with the free end is certainly the needle tubing penetrates the direction and connects gradually the setting, on the stiff end through articulate tough mouthful with the recess of needle point protective sheath links to each other, be equipped with on the kink the opening, the opening supplies the needle tubing passes, the barrier plate supports the surface of needle tubing, the free end is fixed through the couple on the boss of pipe seat.

In any of the above schemes, preferably, the needle tip protection sleeve is sleeved on the catheter base, and a longitudinal rib is arranged at a joint of the catheter base and the needle tip protection sleeve.

In any of the above embodiments, preferably, the liquid inlet of the catheter hub is connected to an extension tube, and an end of the extension tube is connected to a two-way or three-way tube with a threaded joint.

The invention has the beneficial effects that:

the indwelling needle product of the present application is provided with a safety device which can prevent the user from contacting the needle tip after the catheter is inserted into the patient's blood vessel and the needle tube is withdrawn out of the catheter hub, and also prevent the user from contacting the residue on the needle tip after the needle tube is withdrawn;

the indwelling needle in the application can automatically activate the safety device, namely, an operator only needs to draw out the needle tube, and when the needle tip is separated from the catheter seat, the safety device can be automatically activated to sleeve the needle tip without additional operation;

when the puncture needle is used for puncture, blood return can be rapidly observed at the position of the sleeve, so that the phenomenon that the needle head of an indwelling needle tube penetrates through the back wall of a blood vessel is reduced or avoided, and the working efficiency of workers is improved;

the isolation plug is made of rubber materials, and after the indwelling needle tube is withdrawn, the isolation plug can rapidly close the small hole through which the needle tube passes to prevent blood from flowing out of the catheter base, so that the blood of a patient is prevented from polluting the body of medical care personnel and medical instruments nearby, and the possibility that infectious diseases are diffused by the blood overflowing from the patient is avoided;

in the application, the indwelling needle sleeve is made of polyurethane, and after the sleeve made of the polyurethane punctures into a blood vessel for a period of time, the sleeve can be greatly softened, so that the probability of phlebitis of a patient is reduced, and the comfort level of the patient is improved;

in the application, an open slot is arranged on the side wall close to the tip end of the needle tube, the open slot is communicated with a needle hole at the tip end of the needle tube, and a certain gap is arranged between the needle tube and the sleeve, so that blood can conveniently flow through the sleeve;

in the application, the needle handle is provided with a side wing, and the single butterfly wing-shaped side wing conforms to the hand shape of medical care personnel, so that the medical care personnel can accurately align the needle and puncture the needle conveniently; the convex points on the side wings of the needle handle can facilitate the medical staff to control the speed and the force of puncturing and pulling out the needle head;

in the application, the extension pipe is arranged and used for connecting the three-way (or two-way) and the catheter seat and guiding the liquid medicine into the catheter seat from the three-way (or two-way), and the three-way (or two-way) is flexibly connected with the catheter seat, so that the catheter which is punctured into the blood vessel is prevented from sliding out of the blood vessel when the three-way (or two-way) is operated to replace the infusion connector;

the medical needle-free infusion device is provided with the two-way or three-way pipe with the threaded connector, and the threaded connector can be connected with accessories such as an end cap, a heparin cap or a needle-free infusion connector according to actual use requirements, so that more space can be selected for medical workers;

the utility model provides an extension outside of tubes wall is provided with the stagnant flow and presss from both sides, is provided with the line that the finger of being convenient for was pressed on the stagnant flow clamp, makes things convenient for the staff operation, when needs pause infusion, can use the pipeline that the stagnant flow pressed from both sides closed extension pipe to prevent liquid to pass through. The use of the flow stopping clip can prevent the backflow of blood under the condition of no transfusion;

the utility model provides a rib structure along longitudinal distribution is provided with to the inside wall of needle point protective sheath and the inside wall of needle handle to reduce fit clearance, reduce and use the handheld needle handle of operator to puncture the whole range of rocking of hour pipe.

The invention can reduce the times of repeated puncture, effectively prevent the user from contacting the needle point after the catheter is inserted into the blood vessel of the patient and the needle tube is drawn out of the catheter holder, prevent the user from contacting the residue on the needle point and facilitate the use of medical care personnel.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of portion A;

FIG. 3 is an enlarged view of the portion B;

FIG. 4 is a schematic view of a needle tip protective sheath;

FIG. 5 is a schematic structural view of a needle return prevention structure;

FIG. 6 is a schematic view of the structure of the baffle plate;

FIG. 7 is a schematic view of the catheter hub;

FIG. 8 is a schematic view of the configuration of the boss of the catheter hub coupled to the hook of the anti-back needle arrangement;

FIG. 9 is a schematic view of the structure of the needle tip shield inside the needle cannula;

FIG. 10 is a schematic view of the interior of the needle tip shield during needle retraction;

FIG. 11 is a schematic sectional view taken along line C-C';

FIG. 12 is a schematic view of the connection of the needle tip protective sheath with the catheter hub;

FIG. 13 is a schematic view of the needle cannula extending out of the catheter hub cannula;

FIG. 14 is a schematic view of the structure of the needle tip protective sheath with a projection extending therefrom;

in the figure:

1. a tee joint; 2. an extension tube; 3. a flow stopping clip; 4. a needle handle; 5. a baffle plate; 6. a needle tip protective sleeve; 7. a needle return prevention structure; 8. a catheter hub; 9. a rubber isolating plug; 10. riveting; 11. a sleeve; 12. a needle tube; 13. a protrusion; 14. an open slot; 15. a flat structure; 16. a connecting port; 17. longitudinal ribs; 18. a fixed end; 19. an opening; 20. a blocking plate; 21. a free end; 22. hanging a tough joint; 23. hooking; 24. a boss; 25. a circular hole; 26. a liquid injection port; 27. a puncture channel; 28. a groove; 29. a clamping block; 30. a bayonet; 31. a bending section; 32. a gap; 33. a needle tip; 34. a through port.

Detailed Description

The technical solution of the present invention is further illustrated by the following specific examples.

As shown in fig. 1, a needle-prick prevention venous indwelling needle comprises a tube seat assembly and a needle handle assembly, wherein the needle handle assembly comprises a needle tube 12 and a needle handle 4, a plurality of bulges 13 are arranged on two side faces of a needle handle flank of the needle handle 4 so as to be convenient for a medical worker to carry out handheld operation, the tail end of the needle tube 12 is connected with the needle handle 4, a needle point of the needle tube 12 penetrates out of a sleeve 11, the tube seat assembly comprises a catheter seat 8 and a sleeve 11, a safety device is arranged at one end of the catheter seat 8, through which the needle point penetrates, so as to prevent the needle point from withdrawing, and the sleeve 11 is arranged at one end of the catheter seat 8, through which the needle point penetrates; a rubber isolation plug 9 is arranged in the catheter base 8, and the outer wall of the rubber isolation plug 9 is tightly attached to the inner wall of the catheter base 8.

As shown in fig. 2, sleeve 11 is disposed within catheter hub 8 by rivet 10; when the device is installed, the tail end of the sleeve 11 is flared, the inner wall of the sleeve 11 is overlapped with the outer wall of the rivet 10, the sleeve 11 is installed on the rivet 10, then the components are inserted into the catheter seat 8, and the rivet 10 is used for fixing the sleeve 11 in a fixing hole of the catheter seat 8 in a riveting mode.

The sleeve 11 is a transparent or semitransparent structure, blood return can be rapidly observed at the sleeve when the puncture needle is used, the phenomenon that a needle head of an indwelling needle tube penetrates through the back wall of a blood vessel is reduced or avoided, and the working efficiency of workers is improved;

the sleeve 11 is made of polyurethane, and after the sleeve 11 made of the material is punctured and enters a blood vessel for a period of time, the sleeve can be greatly softened, so that the probability of phlebitis of a patient is reduced, and the comfort level of the patient is improved.

As shown in fig. 3 and 13, a gap 32 is provided between the needle tube 12 and the cannula 11 for blood backflow; the front end of the needle tube 12 is provided with a sharp needle point 33, the needle point 33 is used for puncture operation, and the side wall of the needle tube 12 close to the needle point 33 is sequentially provided with an open slot 14 and a flat structure 15; the open slot 14 can establish a channel for blood backflow during the puncturing process; the flat structure 15 is arranged at the rear end of the open slot 14, the widest size of the cross section of the flat structure 15 is larger than the outer diameter size of the needle tube 12, and the activated anti-back-stitching structure 7 is ensured not to fall off from the needle tube 12.

As shown in fig. 11, the safety device includes a blocking sheet 5, a needle tip protection cover 6 and a needle return prevention structure 7, wherein a puncture channel 27 for the needle tube 12 to pass through is formed in the needle tip protection cover 6, the blocking sheet 5 is arranged at the penetrating end of the puncture channel 27, the needle return prevention structure 7 is arranged inside the needle tip protection cover 6, and when the needle tube 12 retracts, the needle return prevention structure 7 rebounds to close the puncture channel 27.

As shown in FIG. 6, the blocking sheet 5 is disposed between the needle handle 4 and the flat structure of the needle tube 12 and is installed in the groove 28 at the end of the needle tip protection sleeve 6, and the blocking sheet 5 is provided with a circular hole 25 to ensure that the safety device after activation does not fall off the needle tube 12.

As shown in fig. 5, the needle return preventing structure 7 includes a fixed end 18, a bending portion 31, a blocking plate 20 and a free end 21, the fixed end 18, the bending portion 31, the blocking plate 20 and the free end 21 are sequentially connected along the penetrating direction of the needle tube 12, the fixed end 18 is connected with the connection port 16 of the needle tip protection sleeve 6 through a hanging flexible port 22, the bending portion 31 is provided with an opening 19, the needle tube 12 passes through the opening 19, the blocking plate 20 abuts against the surface of the needle tube 12, and the free end 21 is fixed on the boss 24 of the catheter holder 8 through a hook 23. The anti-back stitching structure 7 is an elastic spring piece; the bending part 31 of the multi-bending structure of the spring piece can reduce the pressure of the spring piece on the needle tube 12, reduce the bending risk of the steel needle, reduce the friction force when withdrawing the needle, and enable medical personnel to pull out the needle more smoothly.

Before needle withdrawing as shown in fig. 9, 10 and 11, the hook 23 is hooked with the boss 24 of the catheter holder 8, the needle return preventing structure 7 rebounds after the needle tube 12 finishes needle withdrawing operation, the free end 21 blocks the puncture channel 27 for the needle tube 2 to pass through, the needle point of the needle tube 12 is prevented from passing through the needle point protective sleeve 6 again, meanwhile, the hook 23 is automatically unhooked from the catheter holder 8, and the needle point protective sleeve 6 is separated from the catheter holder 8.

As shown in fig. 4, 7, 8 and 12, the needle tip protection cover 6 is sleeved on the catheter base 8, the catheter base 8 is inserted into the needle tip protection cover 6, the needle tip protection cover 6 is provided with a bayonet 30 which is matched with a block 29 on the catheter base 8 for limiting the rotation of the needle tip protection cover 6, preferably, the block 29 is symmetrically arranged on the outer surface of the catheter base 8, one side of the top of the catheter base 8 is provided with a boss 24, as shown in fig. 14, the needle tip protection cover 6 is provided with a through port 34 for extending the boss 24, and the boss 24 is used for matching with the hanging hook 23; the needle tip protective sleeve 6 is provided with a longitudinal rib 17, the longitudinal rib 17 is positioned at the joint of the catheter seat 8 and the needle tip protective sleeve 6, the longitudinal rib 17 on the inner wall of the needle tip protective sleeve 6 is not provided with a draft angle, other surfaces except the longitudinal rib 17 are provided with draft angles, the longitudinal rib 17 is used for reducing the fit clearance between the inner wall of the needle tip protective sleeve 6 and the outer wall of the catheter seat 8, the shaking among all parts in the handheld operation process is reduced, and finally, the assembly clearance can be ensured while the needle tip protective sleeve 6 is smoothly demoulded as far as possible; meanwhile, the inner side wall of the needle handle 4 is also provided with rib structures distributed along the longitudinal direction; the liquid injection port 26 of the catheter seat 8 is connected with the extension tube 2, and the end part of the extension tube 2 is connected with the two-way or three-way pipe 1 with a threaded joint. The extension pipe 2 is provided with a flow stopping clamp 3, and the pipeline of the extension pipe 2 is completely closed when needed.

In operation, the remaining needle is inserted into the blood vessel of the patient through the needle tube 12, the needle tube 12 finishes the needle withdrawing operation, at this time, the needle returning prevention structure 7 rebounds, the free end 21 blocks the puncture channel 27 for the needle tube 2 to pass through, the needle point of the needle tube 12 is prevented from passing through the needle point protection sleeve 6 again, simultaneously, the hook 23 is automatically released from being hooked with the catheter seat 8, and the needle point protection sleeve 6 is separated from the catheter seat 8. When the medical catheter is used subsequently, liquid medicine is led into the catheter seat 8 from the tee joint (or the two-way joint) 1, and accessories such as an end cap, a heparin cap or a needleless infusion joint can be connected through the threaded joint of the tee joint (or the two-way joint) 1 according to actual use requirements, so that more selection spaces are provided for medical staff.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (10)

1. The utility model provides a prevent that needle stick hinders vein and keep somewhere needle, includes tube socket subassembly and needle handle subassembly, the needle handle subassembly includes needle tubing and needle handle, the end of needle tubing with the needle handle is connected its characterized in that: the tube seat assembly comprises a catheter seat and a sleeve, a needle point of the needle tube penetrates out of the sleeve, a safety device is arranged at one end, through which the needle point penetrates, of the catheter seat to prevent the needle point from withdrawing, and the sleeve is arranged at one end, through which the needle point penetrates, of the catheter seat.

2. The needle-stick injury preventing venous indwelling needle of claim 1, wherein: the sleeve is disposed within the catheter hub by a rivet.

3. The needle-stick injury preventing venous indwelling needle of claim 2, wherein: the catheter seat is internally provided with a rubber isolation plug, and the outer wall of the isolation plug is tightly attached to the inner wall of the catheter seat.

4. The needle-stick injury prevention venous indwelling needle according to claim 3, wherein: a gap is arranged between the needle tube and the sleeve, and an open slot and a flat structure are sequentially arranged on the side wall of the needle tube close to the needle point.

5. The needle-stick injury preventing venous indwelling needle of claim 4, wherein: the sleeve is of a transparent or semitransparent structure, and the sleeve is made of polyurethane.

6. The needle-stick injury preventing venous indwelling needle of claim 5, wherein: the safety device comprises a separation blade, a needle tip protection sleeve and a needle return prevention structure, wherein the needle tip protection sleeve is provided with a puncture channel for the needle tube to pass through, the penetrating end of the puncture channel is provided with the separation blade, the needle tip protection sleeve is internally provided with the needle return prevention structure, and when the needle tube retracts, the needle return prevention structure rebounds and is closed to the puncture channel.

7. The needle-stick injury preventing venous indwelling needle of claim 6, wherein: the needle tube is provided with a flat structure, the needle tube is provided with a separation blade, the separation blade is provided with a round hole, the round hole is used for the needle tube to pass through, and the diameter of the round hole is smaller than the maximum width of the flat structure arranged on the needle tube, so that the limitation when the needle tube retreats is realized.

8. The needle-stick injury preventing venous indwelling needle of claim 6, wherein: prevent back needle structure includes stiff end, kink, opening, barrier plate and free end, the stiff end the kink the barrier plate with the free end is certainly the needle tubing penetrates the direction and connects gradually the setting, on the stiff end through articulate tough mouthful with the socket of needle point protective sheath links to each other, be equipped with on the kink the opening, the opening supplies the needle tubing passes, the barrier plate supports the surface of needle tubing, the free end is fixed through the couple on the boss of pipe seat.

9. The needle for preventing needle stick injury venous indwelling needle of claim 8, wherein: the needle tip protective sleeve is sleeved on the catheter base, and a longitudinal rib is arranged at the joint of the catheter base and the needle tip protective sleeve.

10. The needle for preventing needle stick injury venous indwelling needle according to any one of claims 1 to 9, wherein: the liquid injection port of the catheter seat is connected with an extension tube, and the end part of the extension tube is connected with a two-way or three-way pipe of a threaded connector.

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