Catheter device with needling prevention and Lyou distance fixing functions

Abstract

The utility model relates to the technical field of medical apparatus and instruments, and provides a catheter device with needling prevention and distance fixing functions, which comprises a needle seat shell and a tearable seat, a needle tube is connected onto the needle seat shell, a catheter seat and a needling prevention protection module are mounted in the needle seat shell, and the tearable seat is connected with a tearable needle tube. The catheter seat is connected with a catheter matched with the needle tube, the needle tube is provided with a fixing ring matched with the anti-needling protection module, the needle seat shell is provided with a clamping groove used for fixing the catheter seat and a sliding groove used for moving the catheter seat, and the end of the needle seat shell is provided with a guide arm and a positioning arm. Through the cooperation of the fixing ring and the anti-acupuncture protection module, the needle head part is fixedly contained in the anti-acupuncture protection module when the needle tube is drawn out, the anti-acupuncture effect is achieved under the condition that passing of a guide wire is not affected, and the catheter base and the lateral branch connector for fixing the distance are of an integrated structure; and the guide arm, the positioning arm and the tearable seat can be assembled in positive and negative directions, the structure is simple, and the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a catheter device with needle puncture prevention and distance fixing functions. Background Art

[0002] Medium-length catheter is a kind of venous vascular access device, also known as midline catheter, which is often used for short-term (less than 30 days) access to the peripheral venous system through peripheral venous puncture for infusion and intravenous treatment, reducing the pain and fear of patients caused by repeated venous puncture, facilitating clinical medication and reducing the workload of nursing staff. It is a commonly used clinical medical device; during the use of medium-length catheter, the needle is contaminated by the patient's blood. When placing and discarding the needle, medical staff are easily stabbed by the needle and infected with diseases. At the same time, the discarded needle is exposed to the air, which poses environmental pollution and safety hazards.

[0003] In order to eliminate the safety hazard of the needle, the existing medium-length catheters are generally designed with an anti-needlestick protection device structure, which is usually achieved by processing a groove or protrusion on the needle tube, and cooperating with the corresponding clamping structure on the anti-needlestick protection module to fix the needle in the anti-needlestick protection module to ensure that the needle will not injure the user when it is taken out; when using the groove structure, the anti-needlestick protection module structure will probe into the inside of the needle tube, affecting the passage of the guide wire, and the groove structure will reduce the strength of the needle tube; when processing the protrusion structure, the method of flattening the needle tube or performing water swelling processing on the outer surface of the needle tube is usually used. The water swelling processing technology requires high precision and high cost, and mass production is difficult. After the needle tube is flattened, the guide wire is limited in insertion, especially for the specifications of the needle tube with thinner inner and outer diameters. In order to pass the guide wire, the inner and outer diameters of the needle tube need to be increased, which will cause the puncture force to increase, the puncture sharpness to decrease, and increase the patient's pain.

[0004] In addition, the existing products on the market have a tearable seat and a single side of the needle seat shell with a matching snap-on slot structure, and the assembly process requires identification of direction, which affects the assembly efficiency to a certain extent. In addition, the existing medium-length catheter structure requires additional fixing accessories to fix the distance (Lai distance) of the needle tube protruding from the front end of the catheter. The structure is complex, and medical staff need to remove the fixing accessories after the catheter puncture is completed, which increases the workload of medical staff. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a catheter device with needle-stick prevention and distance fixing functions to address the deficiencies of the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A catheter device with anti-needlestick and needle distance fixing functions, comprising a needle seat shell and a tearable seat, a needle tube being connected to the needle seat shell, characterized in that a catheter seat and an anti-needlestick protection module are installed inside the needle seat shell, a catheter matching the needle tube is connected to the catheter seat, a fixing ring matching the anti-needlestick protection module is installed on the needle tube, and a card slot for fixing the catheter seat and a slide slot for the movement of the catheter seat are provided on the needle seat shell.

[0008] As a further improvement of the present invention, the fixing ring is a hollow structure, and the end of the fixing ring is provided with a smooth rounded corner.

[0009] As a further improvement of the utility model, the catheter seat is provided with a side branch interface, the side branch interface is provided with a limit platform, and the limit platform cooperates with the card slot.

[0010] As a further improvement of the utility model, the side branch interface is connected to the injection connector through an extension tube.

[0011] As a further improvement of the present invention, the anti-acupuncture protection module includes an anti-acupuncture shell, an anti-acupuncture shrapnel is installed inside the anti-acupuncture shell, an anti-acupuncture cover for fixing the anti-acupuncture shrapnel is provided on the anti-acupuncture shell, a shell inlet pinhole and a shell outlet pinhole are respectively provided at the ends of the anti-acupuncture shell, and an elastic arm and a shrapnel pinhole are provided on the anti-acupuncture shrapnel.

[0012] As a further improvement of the utility model, a baffle is provided on the needle puncture-proof cover.

[0013] As a further improvement of the utility model, a guide arm and a positioning arm are provided at the end of the needle seat shell, a guide hole matching with the guide arm is provided on the tearable seat, and a limit plate matching with the positioning arm is provided on the tearable seat.

[0014] As a further improvement of the utility model, the positioning arms are symmetrically arranged on both sides of the slide groove, the left and right wings of the tearable seat are symmetrically provided with guide holes matching with the guide arms, and the left and right wings of the tearable seat are symmetrically provided with limit plates matching with the positioning arms.

[0015] As a further improvement of the present invention, a fixing groove is provided on the positioning arm, a fixing protrusion is provided on the limiting plate, and the positioning arm and the limiting plate are fixed by the fixing groove and the fixing protrusion.

[0016] As a further improvement of the utility model, a gripping plane is provided on the outer contour of the side branch interface.

[0017] The beneficial effects of the utility model are:

[0018] 1. The utility model provides a medium-length catheter with an anti-needlestick function. Through the cooperation of a fixing ring and an anti-needlestick protection module, the needle tip is fixedly accommodated in the anti-needlestick protection module when the needle tube is withdrawn, and the anti-needlestick function is played without affecting the passage of a guide wire. The catheter seat and the side branch interface for fixing the distance between the catheter and the needle are an integrated structure with a simple structure and convenient operation. Moreover, through the cooperation of the guide arm and the positioning arm structure on the needle seat housing and the corresponding components on the tearable seat, the assembly can be performed without identifying the assembly direction, thereby improving the production efficiency.

[0019] 2. The utility model provides a fixing ring structure on the needle tube, and the fixing ring can be processed by bonding, welding or forging. The fixing process is relatively simple and low-cost. When used in conjunction with the anti-needlestick protection module, when the needle tip of a medium-length catheter retracts to the entrance of the anti-needlestick protection module, the spring sheet in the anti-needlestick protection module rebounds and resets. Since the outer diameter of the fixing ring is larger than the inner diameter of the outlet of the anti-needlestick protection module, the needle tip is fixedly accommodated in the anti-needlestick protection module, thereby achieving an anti-needlestick effect. Since the needle tube is hollow without being flattened, deformed or grooved, the guide wire can be smoothly inserted without affecting the performance of the needle tube itself.

[0020] 3. In the utility model, a side branch interface is arranged on the catheter seat. The cooperation between the catheter seat limit platform arranged on the side branch interface and the card slot of the needle seat shell ensures the stability of the distance (Layer distance) of the needle tube exposed from the front end of the catheter. The extension tube connection and the Layer distance fixing functions are realized simultaneously through the integrated catheter seat structure. There is no need to set a separate Layer distance fixing accessory, which simplifies the medium-length catheter structure. At the same time, the catheter can be moved forward and backward or left and right by holding the gripping plane on the outer contour of the side branch interface. After the catheter puncture is completed, there is no need to remove the fixing accessories, which facilitates clinical operation and reduces the workload of medical staff.

[0021] 4. In the utility model, a guide arm and a positioning arm structure are provided on the needle seat shell. The guide arm structure can cooperate with the guide holes on the left and right wings of the tearable seat, and the positioning arm structure can cooperate with the limit plates on the left and right wings of the tearable seat, so that the two can be assembled in both positive and negative directions. There is no need to identify the assembly direction during assembly, which simplifies the assembly process and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Attached Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0024] Attached Figure 2 It is a schematic diagram of the local structure of the needle seat housing of the utility model.

[0025] Attached Figure 3 For attachment Figure 2 A magnified view of the local structure.

[0026] Attached Figure 4 It is a schematic diagram of the local structure of the catheter seat of the utility model.

[0027] Attached Figure 5 It is a schematic diagram of the local structure of the tearable seat of the utility model.

[0028] Attached Figure 6 It is a schematic diagram of the partial structure of the needle-puncture protection module of the utility model.

[0029] Attached Figure 7 This is a partial structural cross-sectional view of the anti-needle puncture protection module of the utility model in an unactivated state.

[0030] Attached Figure 8 This is a partial structural cross-sectional view of the anti-needle puncture protection module of the utility model in an activated state.

[0031] In the figure: 1 is a needle seat shell, 101 is a card slot, 102 is a slide slot, 103 is a guide arm, 104 is a positioning arm, 105 is a fixed groove, 2 is a needle tube, 3 is a fixing ring, 4 is a catheter seat, 401 is a side branch interface, 402 is a limit platform, 403 is a gripping plane, 5 is a catheter, 6 is an anti-acupuncture protection module, 601 is an anti-acupuncture shell, 602 is an inlet needle hole of the shell, 603 is an outlet needle hole of the shell, 604 is an anti-acupuncture shrapnel, 605 is an elastic arm, 606 is a shrapnel needle hole, 607 is an anti-acupuncture cover, 608 is a baffle, 7 is a tearable seat, 701 is a guide hole, 702 is a limit plate, 703 is a fixed protrusion, 8 is an extension tube, and 9 is an injection connector. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] like Figure 1As shown, a catheter device with anti-needlestick and Lay distance fixing functions includes a needle seat housing 1 and a tearable seat 7, the needle seat housing 1 is connected to a needle tube 2, and is characterized in that a catheter seat 4 and an anti-needlestick protection module 6 are installed inside the needle seat housing 1, a catheter 5 matched with the needle tube 2 is connected to the catheter seat 4, a fixing ring 3 matched with the anti-needlestick protection module 6 is installed on the needle tube 2, and a card slot 101 for fixing the catheter seat 4 and a slide slot 102 for the movement of the catheter seat 4 are provided on the needle seat housing 1.

[0034] Preferably, the needle tube 2 and the fixing ring 3 are made of metal.

[0035] In a specific embodiment, further, the fixing ring 3 is a hollow structure, and the end of the fixing ring 3 is provided with a smooth rounded corner. The fixing ring 3 is fixedly installed on the needle tube 2 by bonding, welding or forging. The two ends of the fixing ring 3 have a smooth transition to prevent the fixing ring 3 from damaging the catheter 5 during the sliding process in the catheter 5.

[0036] In a specific embodiment, further, the catheter seat 4 is provided with a side branch interface 401 , and the side branch interface 401 is provided with a limit platform 402 , and the limit platform 402 cooperates with the card slot 101 , so that the side branch interface 401 is clamped inside the card slot 101 .

[0037] In a specific embodiment, further, the side branch interface 401 is connected to the injection connector 9 through an extension tube 8 .

[0038] Preferably, a flow-stop clamp is installed on the extension tube 8 .

[0039] In a specific embodiment, further, the anti-acupuncture protection module 6 includes an anti-acupuncture shell 601, an anti-acupuncture shrapnel 604 is installed inside the anti-acupuncture shell 601, and an anti-acupuncture cover 607 for fixing the anti-acupuncture shrapnel 604 is provided on the anti-acupuncture shell 601. The ends of the anti-acupuncture shell 601 are respectively provided with a shell entrance pinhole 602 and a shell exit pinhole 603. The shell entrance pinhole 602 is used for the needle tip part of the needle tube 2 to enter the anti-acupuncture protection module 6. The inner diameter of the shell entrance pinhole 602 is larger than the outer diameter of the fixing ring 3. The anti-acupuncture shrapnel 604 is provided with an elastic arm 605 and a shrapnel pinhole 606. The inner diameter of the shrapnel pinhole 606 is smaller than the outer diameter of the fixing ring 3.

[0040] In a specific embodiment, further, a baffle 608 is provided on the anti-acupuncture cover 607, and the baffle 608 is used to fix the position of the anti-acupuncture shrapnel 604 inside the anti-acupuncture shell 601 to prevent the anti-acupuncture shrapnel 604 from shaking and affecting the anti-acupuncture protection effect.

[0041] In a specific embodiment, further, a guide arm 103 and a positioning arm 104 are provided at the end of the needle seat housing 1, a guide hole 701 matching with the guide arm 103 is provided on the tearable seat 7, and a limiting plate 702 matching with the positioning arm 104 is provided on the tearable seat 7.

[0042] In a specific embodiment, further, the positioning arms 104 are symmetrically arranged on both sides of the slide groove 102, the left and right wings of the tearable seat 7 are symmetrically provided with guide holes 701 that cooperate with the guide arms 103, and the left and right wings of the tearable seat 7 are symmetrically provided with limit plates 702 that cooperate with the positioning arms 104. Through the assembly and cooperation of the guide arms 103, the two positioning arms 104 and the tearable seat 7, the needle seat housing 1 and the tearable seat 7 are relatively stable, preventing the tearable seat 7 from swinging up and down or left and right during the puncture process.

[0043] In a specific embodiment, further, the positioning arm 104 is provided with a fixing groove 105, and the limiting plate 702 is provided with a fixing protrusion 703. The positioning arm 104 and the limiting plate 702 are fixed by the fixing groove 105 and the fixing protrusion 703, thereby preventing natural axial movement between the tearable seat 7 and the needle seat housing 1.

[0044] In a specific embodiment, further, a gripping plane 403 is provided on the outer contour of the side branch interface 401 , so that the user can hold the side branch interface 401 and adjust the position of the side branch interface 401 in the slot 101 or the slide slot 102 .

[0045] The specific working process is as follows: when using the catheter device to puncture the patient, first check the components of the catheter device to ensure that they are in a normal state. After the inspection is completed, adjust the position of the side branch interface 401 so that the limit platform 402 is fixedly engaged with the card slot 101. At this time, the needle seat housing 1 and the catheter seat 4 are relatively fixed to ensure the stability of the Lay distance. During puncture, the needle tube 2 and the catheter 5 enter the patient's body together. After the puncture is completed, adjust the side branch interface 401 so that the limit platform 402 and the card slot 101 are disengaged from the engaged state, and then the corresponding components of the needle seat housing 1 are withdrawn. During the withdrawal process, the needle tip of the needle tube 2 enters the anti-needle puncture protection module 6 through the needle hole 602 at the entrance of the shell. After the needle tip of the needle tube 2 passes through the position of the elastic arm 605, the elastic arm 605 rebounds and resets to close the needle hole 602 at the entrance of the shell. Since the outer diameter of the fixing ring 3 is larger than the inner diameter of the shrapnel needle hole 606, the needle tip of the needle tube 2 is fixedly accommodated in the anti-needle puncture protection module 6, which has an anti-needle puncture effect.

[0046] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the embodiments of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.

[0047] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A catheter device with needle-stick prevention and distance-fixing functions, comprising a needle seat housing (1) and a tearable seat (7), wherein a needle tube (2) is connected to the needle seat housing (1), characterized in that: The needle seat housing (1) has a catheter seat (4) and an anti-needle puncture protection module (6) installed inside. The catheter seat (4) is connected to a catheter (5) that matches the needle tube (2). The needle tube (2) is equipped with a fixing ring (3) that matches the anti-needle puncture protection module (6). The needle seat housing (1) is provided with a clamping groove (101) for fixing the catheter seat (4) and a sliding groove (102) for moving the catheter seat (4).

2. The catheter device with needle-stick prevention and distance-fixing functions according to claim 1, characterized in that: The fixing ring (3) is a hollow structure, and the end of the fixing ring (3) is provided with a smooth rounded corner.

3. The catheter device with needle-stick prevention and distance-fixing functions according to claim 1, characterized in that: The catheter seat (4) is provided with a side branch interface (401), and the side branch interface (401) is provided with a limit platform (402), and the limit platform (402) cooperates with the card slot (101).

4. The catheter device with needle-stick prevention and distance-fixing functions according to claim 3, characterized in that: The side branch interface (401) is connected to the drug injection connector (9) via an extension tube (8).

5. The catheter device with needle-stick prevention and distance-fixing functions according to claim 1, characterized in that: The anti-acupuncture protection module (6) comprises an anti-acupuncture shell (601), an anti-acupuncture shrapnel (604) is installed inside the anti-acupuncture shell (601), an anti-acupuncture cover (607) for fixing the anti-acupuncture shrapnel (604) is provided on the anti-acupuncture shell (601), a shell inlet pinhole (602) and a shell outlet pinhole (603) are respectively provided at the ends of the anti-acupuncture shell (601), and an elastic arm (605) and a shrapnel pinhole (606) are provided on the anti-acupuncture shrapnel (604).

6. The catheter device with needle-stick prevention and distance-fixing functions according to claim 5, characterized in that: The anti-puncture cover (607) is provided with a baffle (608).

7. The catheter device with needle-stick prevention and distance-fixing functions according to claim 1, characterized in that: A guide arm (103) and a positioning arm (104) are provided at the end of the needle seat housing (1); a guide hole (701) matching with the guide arm (103) is provided on the tearable seat (7); and a limit plate (702) matching with the positioning arm (104) is provided on the tearable seat (7).

8. The catheter device with needle-stick prevention and distance-fixing functions according to claim 7, characterized in that: The positioning arms (104) are symmetrically arranged on both sides of the slide groove (102); the left and right wings of the tearable seat (7) are symmetrically provided with guide holes (701) that match the guide arms (103); and the left and right wings of the tearable seat (7) are symmetrically provided with limit plates (702) that match the positioning arms (104).

9. The catheter device with needle-stick prevention and distance-fixing functions according to claim 7, characterized in that: The positioning arm (104) is provided with a fixing groove (105), the limiting plate (702) is provided with a fixing protrusion (703), and the positioning arm (104) and the limiting plate (702) are fixed by the fixing groove (105) and the fixing protrusion (703).

10. The catheter device with needle-stick prevention and distance-fixing functions according to claim 3, characterized in that: A gripping plane (403) is provided on the outer contour of the side branch interface (401).

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