Novel remaining needle for hemodialysis

Abstract

The novel remaining needle comprises an inner pipeline and an outer pipeline, the outer pipeline is located on the outer side of the inner pipeline, and the size of the outer pipeline is smaller than the inner diameter of a blood vessel; the near ends of the inner pipeline and the outer pipeline are respectively connected with hemodialysis equipment; and a needle core is arranged in the inner pipeline in a sliding manner. By means of the mode, the dialysis input branch and the dialysis output branch are combined together, when the remaining needle is used, only one remaining needle for dialysis needs to be used for puncturing a blood vessel of a patient for one time, and the problem that an existing remaining needle for dialysis needs to be used at the dialysis input end and the dialysis output end respectively is solved. The number of times of blood vessel puncture of a patient is reduced, the pain of the patient is relieved, and damage to blood vessels is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially, it relates to a novel hemodialysis indwelling needle. BACKGROUND

[0002] The indwelling needle for dialysis is a kind of medical tool, when dialysis, catheter and needle core are punctured into blood vessel together, when catheter enters blood vessel completely, needle core is withdrawn, only soft catheter is left in blood vessel to carry out infusion treatment, can reduce the pain caused by repeated blood vessel puncture, reduce the damage to patient's blood vessel.The existing puncture needle has steel needle, ordinary indwelling needle, but two kinds of needles need to puncture two needles to complete.Generally speaking, 3-4 times of treatment per patient per week, 6-8 needles need to be punctured per week, 288-384 needles need to be punctured per year, bring great pain to patient and damage to blood vessel, the blood vessel of dialysis patient is their lifeline, need to reduce the damage to blood vessel as far as possible during treatment, to reduce the occurrence of relevant complications, also for better treatment purpose.Therefore, it is of great significance to design a novel hemodialysis indwelling needle to reduce the puncture damage suffered by patient during dialysis. SUMMARY

[0003] The utility model aims at providing a novel hemodialysis indwelling needle to reduce the puncture damage suffered by patient during dialysis.

[0004] To solve the above technical problem, the utility model adopts the following technical scheme:

[0005] A novel hemodialysis indwelling needle, comprising: inner pipeline and outer pipeline, the outer pipeline is located the inner pipeline outside, the outer pipeline size is less than the inner diameter of blood vessel;

[0006] The proximal end of the inner pipeline and outer pipeline is connected with hemodialysis equipment respectively;

[0007] The needle core is slidably arranged in the inner pipeline.

[0008] Preferably, the diameter of the inner pipeline is 1.4mm;The diameter of the outer pipeline is 2mm.

[0009] Preferably, a plurality of side holes are formed on the outer pipeline, and the plurality of side holes are annularly distributed on the side surface of the outer pipeline.

[0010] Preferably, the distal end of the outer pipeline is a wedge-shaped opening, and is bonded to the outer wall of the inner pipeline;The proximal end of the outer pipeline is bonded to the outer wall of the inner pipeline.

[0011] Preferably, an output port is formed on the side surface of the proximal end of the outer pipeline, and the output port is connected with an output pipeline.

[0012] Preferably, a hemostatic clamp is arranged on the output pipeline.

[0013] Preferably, a hemostatic clamp is arranged on the proximal end of the inner pipeline.

[0014] The utility model discloses the beneficial effect is:

[0015] (1) the utility model discloses a kind of indwelling needle for hemodialysis, overall structure is simple, and production cost is low;The input branch and output branch of dialysis are combined together, when using, only one dialysis indwelling needle is used to carry out once puncture on the blood vessel of patient, solve the problem that the existing dialysis indwelling needle needs to use one dialysis indwelling needle at dialysis input end and output end, reduce the blood vessel puncture frequency of patient, alleviate the pain of patient, and reduce the damage to blood vessel.

[0016] (2) the utility model discloses a plurality of side holes are arranged on the lateral wall of outer pipeline as the port of blood entering outer pipeline, the side hole is annularly distributed on the side of outer pipeline, improves the blood circulation of dialysis, avoids to be blocked.

[0017] (3) the utility model discloses that the distal end of outer pipeline is set to wedge-shaped mouth, and is bonded on the outer wall of inner pipeline, and the connecting place is smooth connection, reduces the friction damage to blood vessel. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a kind of indwelling needle for hemodialysis of the utility model three-dimensional structure schematic view;

[0019] Figure 2 is the cross-sectional schematic view of the shown one kind of indwelling needle for hemodialysis;

[0020] The marks of components in the drawings are as follows:

[0021] 1, inner pipeline;2, outer pipeline;2-1, wedge-shaped mouth;3, needle core;4, side hole;5, output pipeline;6, catheter seat. DETAILED DESCRIPTION

[0022] The preferred embodiments of the utility model are described in detail in connection with the drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, so that the protection scope of the utility model can be more clearly and explicitly defined.

[0023] Embodiment:

[0024] This embodiment introduces the structure of a kind of indwelling needle for hemodialysis.

[0025] As Figure 1 , 2As shown, a new type of hemodialysis indwelling needle comprises: an inner conduit 1 and an outer conduit 2, the outer conduit 1 is located outside the inner conduit 2, the outer conduit 2 is smaller than the inner diameter of the blood vessel, in this embodiment, the diameter of the inner conduit is 1.4mm; the diameter of the outer conduit is 2mm.

[0026] The proximal end of the inner conduit 1 and the outer conduit 2 is connected with a hemodialysis device respectively;

[0027] The inner conduit 1 is slidably provided with a needle core 3 inside.

[0028] In this embodiment, the inner conduit 1 is connected with a venous line, the outer conduit 3 is connected with an arterial line, and is connected to a hemodialysis device respectively.

[0029] In this embodiment, a plurality of side holes 4 are formed on the outer conduit 3, and the plurality of side holes 4 are annularly distributed on the side of the outer conduit 3. Through the arrangement of the plurality of side holes, the blood circulation of dialysis is facilitated, and blockage is avoided.

[0030] In this embodiment, the distal end of the outer conduit 2 is a wedge-shaped opening 2-1, and is bonded to the outer wall of the inner conduit 1; the proximal end of the outer conduit 2 is bonded to the outer wall of the inner conduit 1. When used, the outer conduit with the side hole part enters the blood vessel under the action of the inner conduit.

[0031] In this embodiment, an output port is formed on the side of the proximal end of the outer conduit 2, the output port is connected with an output conduit 5, and the outer conduit 2 and the output conduit 5 are communicated through the output port. In order to facilitate the connection of the outer conduit and the output conduit at the output port, a catheter seat 6 is further sleeved here.

[0032] In this embodiment, a hemostatic clamp is arranged on the output conduit 5, and a hemostatic clamp is arranged on the proximal end of the inner conduit 1. In addition, a luer joint and a luer cap are further arranged on the outer conduit and the inner conduit of the indwelling needle, and the structure and connection mode of the luer joint and the luer cap are the technical means commonly used by the person skilled in the art, which is the prior art, so it will not be described in detail.

[0033] The working principle of the utility model is that when hemodialysis is performed, the indwelling needle is held by hand, the tip of the needle core is pierced into the blood vessel of the arm of the patient, the blood return condition is observed, then the needle core is pushed into the blood vessel, the inner conduit enters the blood vessel together with the needle core, at the same time, the outer conduit also enters the blood vessel, until the side holes on the outer conduit are all located in the blood vessel, in this process, the hemostatic clamp on the outer conduit and the inner conduit is clamped tightly, then the needle is pulled out of the inner conduit, finally the indwelling needle and the arm of the patient are fixed by using medical adhesive tape; the whole process only needs to use one indwelling needle to puncture the arm of the patient once, without using one dialysis indwelling needle at the input end and the output end of dialysis respectively, the number of blood vessel punctures of the patient is reduced, and the pain of the patient is reduced.

[0034] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made by using the content of the present application specification and drawings, are also included in the patent protection scope of the present application.

Claims

1. A novel indwelling needle for hemodialysis, characterized in that, Include: The inner pipe (1) and outer pipe (2), the outer pipe (2) is located outside the inner pipe (1), the outer pipe (2) size is less than the inner diameter of the blood vessel; The proximal end of the inner pipe (1) and outer pipe (2) is connected with hemodialysis equipment respectively; The inner pipe (1) is slidably provided with a needle core (3) inside; The diameter of the inner pipe (1) is 1.4mm; the diameter of the outer pipe (2) is 2mm; A plurality of side holes (4) are formed on the outer pipe (2), and a plurality of the side holes (4) are annularly distributed on the side of the outer pipe (2).

2. The novel hemodialysis retention needle according to claim 1, characterized in that: The distal end of the outer pipe (2) is a wedge-shaped port, and is bonded to the outer wall of the inner pipe (1); the proximal end of the outer pipe (2) is bonded to the outer wall of the inner pipe (1).

3. The novel hemodialysis retention needle according to claim 1, wherein: An output port is formed on the side of the proximal end of the outer pipe (2), and the output port is connected with an output pipe (5).

4. The novel hemodialysis retention needle according to claim 3, characterized in that: A hemostatic clamp is arranged on the output pipe (5).

5. The novel hemodialysis retention needle according to claim 1, wherein: A hemostatic clamp is arranged on the proximal end of the inner pipe (1).

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