CN211634563U

CN211634563U - External cavity-free hemodialysis indwelling needle

Info

Publication number: CN211634563U
Application number: CN201922474021.8U
Authority: CN
Inventors: 周静妍; 周红卫
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-09
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to the field of medical equipment, specifically disclose an external chamber-free hemodialysis indwelling needle, include: the indwelling needle comprises an indwelling needle stem, a submerged tunnel in the indwelling needle stem, an indwelling needle handle connected with the indwelling needle stem, a silica gel block and a through tunnel. The indwelling needle stem of the utility model is made of polyurethane material, can be bent in the blood vessel of human body, and can not damage the blood vessel; the exposed part is very small, so that the daily action of the patient is hardly influenced; the sneak tunnel in the indwelling needle stem is in a normally closed state when not in use, so that the blood is prevented from being retained in the tunnel, and the risk of forming thrombus is avoided; the blood-guiding needle stem adopts a round head design, so that the inner wall of the tunnel is prevented from being scratched when the blood-guiding needle stem passes through the sneak tunnel.

Description

External cavity-free hemodialysis indwelling needle

Technical Field

The utility model belongs to the field of medical equipment, in particular to external no chamber hemodialysis indwelling needle.

Background

Hemodialysis is an effective common means for replacing and treating end-stage renal diseases (uremia), blood in a patient body is led out of the body through a blood vessel access during treatment and is returned to the patient after purification treatment, the process is the hemodialysis, and a stable blood vessel access is a prerequisite condition for realizing effective dialysis, so that the establishment of the blood vessel access capable of being repeatedly punctured is significant. The existing main method is to anastomose the artery vessel and the superficial vein vessel (or artificial vessel) in the arm of the patient under the skin to form arteriovenous fistula (autologous fistula or graft fistula), and then puncture the fistula vessel with an internal fistula needle to perform hemodialysis. When the arteriovenous fistula is used, if puncture is inaccurate, blood vessels and surrounding tissues are easily damaged; bleeding and hematoma are easy to appear after the needle is pulled out; when hemodialysis is not performed, a relatively large short-circuit circulation phenomenon occurs, which causes a heavy burden on the organs such as the heart, lungs, and liver of a patient, and induces functional failure thereof. The use of hemodialysis catheters can only supplement main flow vascular access (arteriovenous fistula), and malignant results such as infection, thrombus stenosis and the like are easily caused. Therefore, it is of great significance to explore and establish a novel blood vessel passage which can be repeatedly punctured and used, is safe and effective and has few side effects.

The indwelling needle is a common needle tool in clinic, a hard needle point is usually placed in a blood vessel, a needle seat is connected with an infusion tube when in use, and heparin is injected into the indwelling needle when not in use so as to prevent the blood from coagulating in the needle tube. However, the existing indwelling needle adopts a steel needle head, so that the existing indwelling needle is easy to penetrate through a blood vessel when in use, and the action of a patient is limited in order to prevent accidents; although heparin for preventing blood coagulation is added into the indwelling needle, blood is inevitably remained in the needle tube, so that internal thrombus is formed, and because the needle point is made of hard material and is fixed, external thrombus is easily formed outside the needle point, and if the thrombus spreads to the inside of the blood vessel of a patient, the blood vessel of the patient is seriously injured.

Disclosure of Invention

An object of the utility model is to provide an external no chamber hemodialysis indwelling needle to overcome current indwelling needle pipe chamber low discharge not enough, damage the blood vessel easily when using, easily produce the thrombus and the inconvenient defect of action.

In order to achieve the above object, the utility model provides an external chamber-free hemodialysis indwelling needle, include: the inside of the indwelling needle stem is provided with a closed gap which forms a submerged tunnel, and two ends of the submerged tunnel respectively extend outwards from two ends of the indwelling needle stem; and one end of the indwelling needle handle is connected with one end of the indwelling needle stem, a silica gel block is arranged in the indwelling needle handle, a closed through tunnel is arranged in the silica gel block, one end of the through tunnel is in butt joint with one end of the submerged tunnel, and the other end of the through tunnel extends outwards from the other end of the needle handle.

Preferably, in the above technical solution, a disinfection cap is provided at the other end of the indwelling needle handle, and the disinfection cap is detachably connected to the needle handle.

Preferably, in the above technical solution, the needle stem of the indwelling needle is made of polyurethane.

Preferably, in the above technical solution, a chamfer is disposed between the outer wall of the other end of the indwelling needle stem and the end face.

Preferably, in the above technical scheme, the other end of the indwelling needle handle is provided with an external thread, and the disinfection cap is internally provided with a disinfection cap internal thread matched with the external thread.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model provides an it has elastic polyurethane material to keep somewhere needle stalk to have adopted the softness, can adapt to the vascular shape and buckle in human blood vessel, can not harm the blood vessel, very little and hug closely skin because of the needle handle, can not influence the daily action of patient.

2. Because the cavity-free sneak tunnel is arranged in the needle stem of the indwelling needle, compared with the traditional cavity structure, the needle stem is smaller, and the risk of thrombosis in the blood vessel is greatly reduced.

3. The sneak tunnel in the needle stem of the indwelling needle is in a normally closed state when not in use, so that thrombus is prevented from being formed inside the tunnel; when the round blunt-end blood-leading needle passes through the sneak tunnel, the needle handle can be expanded integrally to enable the outer wall of the needle handle to creep, so that the probability of external thrombosis is reduced.

4. The round-head design is adopted at the head of the round blunt-head blood-leading needle, so that the blood-leading needle stem can smoothly penetrate into the sneak tunnel when in use, and the inner wall of the tunnel can be prevented from being scratched.

5. The silica gel block can play the roles of fixing and clamping the round blunt-end blood-leading needle and sealing.

6. After the condition of the patient is improved, the remaining needle can be pulled out, the operation is simple, and the use is convenient.

Drawings

FIG. 1 is a block diagram of an external lumen-free hemodialysis indwelling needle.

Fig. 2 is a structural view of the external lumen-free hemodialysis indwelling needle viewed from another perspective.

Fig. 3 is a structural view of a blunt tip blood-introducing needle.

Figure 4 is a block diagram of the hub.

Description of the main reference numerals:

1-indwelling needle stem, 2-latent tunnel, 3-indwelling needle handle, 4-silica gel block, 5-passage tunnel, 6-round blunt-ended blood-leading needle, 7-disinfection cap, 8-needle core, 31-external thread, 61-blood-leading needle stem, 62-blood-leading needle hole, 63-blood-leading needle plug, 64-side hole, 65-blood-leading needle plug external thread, 71-disinfection cap internal thread, 81-handheld wing, 82-needle point, 83-needle handle, 84-fixed cover and 85-fixed cover internal thread.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

As shown in fig. 1 and 2, the external lumen-free hemodialysis indwelling needle in this embodiment includes: the indwelling needle comprises a needle stem 1, a submerged tunnel 2, a indwelling needle handle 3, a silica gel block 4, a tunnel 5 and a disinfection cap 7.

The indwelling needle stem 1 is made of polyurethane material, a closed gap is opened inside the indwelling needle stem 1 along the axis of the indwelling needle stem 1, and the gap is called as a submerged tunnel 2; two ends of the submerged tunnel 2 respectively extend outwards from two ends of the remaining needle stem 1; one end of the indwelling needle stem 1 is connected with one end of the indwelling needle handle 3, and a chamfer angle is formed between the outer wall and the end face of the other end of the indwelling needle stem 1; a silica gel block 4 is arranged in the indwelling needle handle 3, one end of the silica gel block 4 is contacted with one end of the indwelling needle stem 1, a closed gap is formed in the middle of the silica gel block 4 to form a tunnel 5, one end of the tunnel 5 is butted with one end of the submerged tunnel 2, and the other end of the tunnel 5 extends outwards from the other end of the indwelling needle handle 3; the outer side wall of the other end of the indwelling needle handle 3 is provided with an external thread 31, the disinfection cap 7 is internally provided with a disinfection cap internal thread 71 matched with the external thread 31, and the disinfection cap 71 can be screwed on the other end of the needle handle 3 through the thread.

With continued reference to fig. 3, the round blunt-tipped blood-introducing needle 6 includes: a blood guide needle stem 61, a blood guide needle hole 62, a blood guide needle bolt 63, a side hole 64 and a blood guide needle bolt external thread 65. The blood introducing needle stem 61 is in a shape of a slender cylinder, one end of the blood introducing needle stem 61 is a circular head, the middle part of the circular head of the end is provided with a blood introducing needle hole 62, and the blood introducing needle hole 62 extends to the other end of the blood introducing needle stem 61 along the axis of the blood introducing needle stem 61 and extends outwards; two side holes 64 are symmetrically formed in the side surface of the blood introducing needle stem 61 close to the round head, and the side holes 64 are communicated with the blood introducing needle hole 62. The other end of the blood guiding needle stem 61 is provided with a blood guiding needle plug 63, and the blood guiding needle plug 63 is provided with a blood guiding needle plug external thread 65 for connecting with a transfusion catheter.

With continued reference to fig. 4, the stylet 8 includes: a hand-held wing 81, a needle tip 82, a needle handle 83, a fixed cover 84 and fixed cover internal threads 85. The diameter of the needle core 8 is matched with the aperture of the blood introducing needle hole 62, so that the needle core can be tightly inserted into the blood introducing needle hole 62; one end of the needle core 8 is provided with a needle point 82, the other end of the needle core 8 is provided with a needle handle 83, the needle handle 83 is provided with a fixed cover 84, the axis of the needle handle 83 is superposed with the axis of the fixed cover 84, the inner wall of the fixed cover 84 is provided with a fixed cover internal thread 85 matched with the blood-leading needle plug external thread 65, so that the fixed cover 84 can be screwed on the blood-leading needle plug 63; two holding wings 81 are symmetrically arranged on both sides of the needle handle 83.

Next, a detailed description is given to the usage and principle of the external cavity-free hemodialysis indwelling needle in this embodiment, so that those skilled in the art can understand the present invention more:

1. puncture and retention: the round blunt-tipped blood-leading needle 6 is inserted into the sneak tunnel 2 through the indwelling needle handle 3, then the needle core 8 is inserted into the blood-leading needle hole 62, the needle point 82 is exposed, the fixing cover 84 and the blood-leading needle plug 63 are screwed mutually, and the two are fixed; then puncture the epidermis of the human body and penetrate into the blood vessel of the patient; fixing the blood penetrating indwelling needle, and then drawing out the round blunt-ended blood leading needle 6 with the needle core 8 from the indwelling needle main body to make the indwelling needle stalk 1 indwelling in the blood vessel of the patient.

2. Blood drainage treatment: when hemodialysis is carried out, the blood guiding needle plug 63 is connected with a dialysis blood path, then the round blunt-ended blood guiding needle 6 passes through the tunnel 5 on the silica gel block 4 and then passes through the latent tunnel 2, and the blood is exposed from the end part of the indwelling needle stem 1 and enters a blood vessel of a human body, so that the blood can be led out for treatment.

3. And (5) ending needle pulling: after the treatment is finished, the round blunt-tipped blood-leading needle 6 is directly pulled out from the remaining needle, and finally, the tail part of the needle handle 3 of the remaining needle is covered with a disinfection cap 7.

4. After the condition of the patient is improved, the remaining needle can be pulled out, the operation is simple, and the use is convenient.

In conclusion, the needle stem of the indwelling needle in the utility model is soft and elastic, can be bent in the blood vessel of the human body, can not damage the blood vessel and can not obstruct the daily action of the patient; the sneak tunnel in the needle stem of the indwelling needle is in a normally closed state when not used, so that the risk of forming thrombus is avoided; the blood-leading needle stem of the round blunt-end blood-leading needle adopts a round-head design, so that the inner wall of the tunnel is prevented from being scratched when the round blunt-end blood-leading needle passes through the submerged tunnel.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. An external cavity-free hemodialysis indwelling needle, which is characterized by comprising:

the needle stem (1) of the remaining needle is internally provided with a closed gap which forms a submerged tunnel (2), and two ends of the submerged tunnel (2) respectively extend outwards from two ends of the needle stem (1) of the remaining needle; and

the indwelling needle comprises an indwelling needle handle (3), one end of the indwelling needle handle (3) is connected with one end of the indwelling needle stem (1), a silica gel block (4) is arranged in the indwelling needle handle (3), a closed through tunnel (5) is arranged in the silica gel block (4), one end of the through tunnel (5) is in butt joint with one end of the submerged tunnel (2), and the other end of the through tunnel (5) extends outwards from the other end of the needle handle (3).

2. The external cavity-free hemodialysis indwelling needle according to claim 1, wherein the other end of the indwelling needle handle (3) is provided with a disinfection cap (7), and the disinfection cap (7) is detachably connected with the needle handle (3).

3. The external cavity-free hemodialysis indwelling needle according to claim 1, wherein the indwelling needle stem (1) is made of polyurethane.

4. The external cavity-free hemodialysis indwelling needle according to claim 1, wherein a chamfer is formed between the outer wall of the other end of the indwelling needle stem (1) and the end face.

5. The external cavity-free hemodialysis indwelling needle according to claim 2, wherein the other end of the indwelling needle handle (3) is provided with an external thread (31), and the disinfection cap (7) is internally provided with a disinfection cap internal thread (71) matched with the external thread (31).