Medical catheter and injection instrument

Abstract

The utility model discloses a medical catheter and an injection instrument, and relates to the technical field of medical instruments. The medical catheter comprises a catheter body, a communicating piece and a connector. A connecting section is arranged at the near end of the catheter main body; the communicating piece is arranged on the periphery of the connecting section in a sleeving mode, and a clamping part corresponding to the connecting section in position is arranged on the inner cavity wall of the communicating piece. One end of the connector is provided with a matching part extending into the connecting section, the clamping part is matched with the matching part to clamp and fix the connecting section between the clamping part and the matching part, and the other end of the connector is suitable for being connected with a matched instrument. According to the medical catheter and the injection instrument, the reliability of connection between the catheter body and the connector is effectively enhanced, the problem that the connector falls off is solved, and the safety of operation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a medical catheter and an injection device. Background Art

[0002] Existing injection catheters and connectors are bonded together using glue. However, some special materials such as PTFE are highly lubricating and non-stick, making them difficult to bond with glue. The resulting bonding is poor and the connectors are not strong enough to fall off. Furthermore, improper bonding can cause the glue to fall off after solidifying, potentially entering the human body through the tube and posing a risk. Utility Model Content

[0003] The main purpose of the present invention is to provide a medical catheter and an injection device, aiming to improve the connection firmness between the catheter body and the connector to avoid the problem of the connector falling off and improve the safety of the operation.

[0004] To achieve the above-mentioned purpose, the present invention provides a medical catheter, comprising:

[0005] a catheter body, wherein a proximal end of the catheter body is provided with a connecting section;

[0006] a connecting piece, sleeved on the outer circumference of the connecting section, wherein the inner cavity wall of the connecting piece is provided with a clamping portion corresponding to the position of the connecting section; and

[0007] A connector, one end of which is provided with a mating portion extending into the connecting section, the clamping portion cooperates with the mating portion to clamp and fix the connecting section between the two, and the other end of the connector is suitable for connecting to a matching device.

[0008] Optionally, the clamping portion is an internal thread, the matching portion is an external thread, and the catheter body is threadedly connected to the connector.

[0009] Optionally, the clamping portion is a plurality of protrusions, the matching portion is a plurality of slots, the plurality of protrusions are snap-fitted with the plurality of slots in a one-to-one snap-fit ​​manner, and the catheter body is snap-fitted and fixed to the connector.

[0010] Optionally, the connecting section is flared.

[0011] Optionally, the catheter body includes a drainage section connected to the connecting section, the inner diameter of the connecting section is larger than the inner diameter of the drainage section, and the outer diameter of the connecting section is larger than the outer diameter of the drainage section.

[0012] Optionally, the connecting piece includes a bite section and an extension section connected to the bite section, the inner cavity shape of the bite section is adapted to the outer shape of the connecting section, and the extension section is sleeved on the outer circumference of the drainage section.

[0013] Optionally, the catheter body is made of PTFE.

[0014] To achieve the above objectives, the present invention further provides an injection device, comprising:

[0015] Air supply device;

[0016] a connector, provided on the air supply device, wherein the air inlet of the connector is in communication with the air supply port of the air supply device, and the powder inlet of the connector is suitable for connecting to a powder container; and

[0017] The medical catheter as described above, wherein the connector at the proximal end of the medical catheter is connected to the powder outlet of the connector, and the distal end of the medical catheter is adapted to extend into the target injection site; the medical catheter comprises:

[0018] a catheter body, wherein a proximal end of the catheter body is provided with a connecting section;

[0019] a connecting piece, sleeved on the outer circumference of the connecting section, wherein the inner cavity wall of the connecting piece is provided with a clamping portion corresponding to the position of the connecting section; and

[0020] A connector, one end of which is provided with a mating portion extending into the connecting section, the clamping portion cooperates with the mating portion to clamp and fix the connecting section between the two, and the other end of the connector is suitable for connecting to a matching device.

[0021] Optionally, the powder outlet and the air inlet of the connector are both provided with connection interfaces, so as to respectively connect the medical catheter and the air supply device through the two connection interfaces.

[0022] Optionally, a sealing gasket is provided between the end of the connection interface and the inner cavity wall of the connector.

[0023] In the technical solution of the present invention, the medical catheter includes a catheter body, a connecting piece, and a connector; the proximal end of the catheter body is provided with a connecting section; the connecting piece is sleeved around the outer periphery of the connecting section, and the inner wall of the connecting piece is provided with a clamping portion corresponding to the position of the connecting section; one end of the connector is provided with a mating portion that extends into the connecting section, and the clamping portion cooperates with the mating portion to clamp and secure the connecting section therebetween, and the other end of the connector is suitable for connecting to a supporting instrument. It can be understood that the present invention provides a medical catheter in which the catheter body and the connector are fixed together by the connecting piece, effectively enhancing the connection reliability between the catheter body and the connector, preventing the problem of the connector falling off, and improving the safety of the procedure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 This is a schematic structural diagram of an embodiment of a medical catheter of the present utility model;

[0026] Figure 2 This is a cross-sectional view of an embodiment of a medical catheter of the present utility model;

[0027] Figure 3 This is a cross-sectional view of the connection between the catheter body and the connector in one embodiment of the medical catheter of the present invention;

[0028] Figure 4 This is a schematic structural diagram of a catheter body in an embodiment of the medical catheter of the present utility model;

[0029] Figure 5 This is a structural diagram of a connecting piece in an embodiment of a medical catheter of the present utility model;

[0030] Figure 6 This is a schematic structural diagram of a connector in an embodiment of a medical catheter of the present utility model;

[0031] Figure 7 This is a structural diagram of an embodiment of the injection device of the present invention.

[0032] Description of Figure Numbers:

[0033] 100. Medical catheter; 200. Air supply device; 300. Connector; 400. Powder container; 10. Catheter body; 20. Connecting piece; 30. Connector; 11. Connecting section; 201. Clamping portion; 301. Fitting portion; 12. Drainage section; 21. Engaging section; 22. Extension section.

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0037] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The present invention provides a medical catheter, which can be used for endoscopic surgery, etc., but is not limited here.

[0040] Reference Figures 1 to 7 In one embodiment of the present invention, the medical catheter 100 includes a catheter body 10, a connecting piece 20, and a connector 30; the proximal end of the catheter body 10 is provided with a connecting section 11; the connecting piece 20 is sleeved on the outer circumference of the connecting section 11, and the inner wall of the connecting piece 20 is provided with a clamping portion 201 corresponding to the position of the connecting section 11; one end of the connector 30 is provided with a mating portion 301 extending into the connecting section 11, and the clamping portion 201 cooperates with the mating portion 301 to clamp and fix the connecting section 11 therebetween. The other end of the connector 30 is suitable for connecting to ancillary equipment such as a connector 300.

[0041] It should be noted that the medical catheter 100 can be used to transport liquid or powdered medicine, etc., which is not limited here.

[0042] In this embodiment, the catheter body 10 may be made of a material with high lubricity and non-stick properties, such as PTFE, etc. The catheter body 10 may include at least one catheter and may also be provided with a plurality of branch catheters.

[0043] The connecting member 20 may be a sleeve-like structure, and may be composed of a single component or an assembly of two or more components, without limitation. The clamping portion 201 may be an external thread or a block structure provided on its inner wall, and the mating portion 301 of the connector 30 may be designed to adapt to the structure of the clamping portion 201, without limitation.

[0044] The connector 30 may be a universal connector that can be connected to an interface of a conventional connector 300 , which is not limited herein.

[0045] It can be understood that the present invention provides a medical catheter 100, wherein the catheter body 10 and the connector 30 are fixed by the connecting piece 20, which effectively enhances the connection reliability between the catheter body 10 and the connector 30, avoids the problem of the connector 30 falling off, and improves the safety of the operation. In addition, this mechanical structure connection method does not use glue to bond the catheter and the connector 30, which can avoid the risk of glue falling off.

[0046] In one embodiment, referring to Figures 2 to 6 The clamping portion 201 is an internal thread, the matching portion 301 is an external thread, and the catheter body 10 is threadedly connected to the connector 30.

[0047] This embodiment adopts a matching structure of a connecting piece 20 and a connector 30. The front end surface of the connector 30 has an external thread, and the inside of the connecting piece 20 has an internal thread. The connecting section 11 at one end of the catheter body 10 is placed between the internal and external threads. The connecting section 11 is deformed by squeezing the threads and firmly fixed between the threads, thereby achieving a clamping fixation between the catheter body 10 and the connector 30.

[0048] Furthermore, in some other embodiments, the clamping portion 201 may be a plurality of protrusions, and the matching portion 301 may be a plurality of slots, with the protrusions and the slots being engaged and adapted one-to-one, so that the catheter body 10 and the connector 30 are engaged and fixed. Obviously, this structure can also firmly fix the connecting section 11.

[0049] In one embodiment, referring to Figure 1 and Figure 4 The catheter body 10 includes a drainage section 12 connected to a connecting section 11. The inner diameter of the connecting section 11 is larger than the inner diameter of the drainage section 12, and the outer diameter of the connecting section 11 is larger than the outer diameter of the drainage section 12. In this embodiment, the connecting section 11 can be flared. This configuration can further improve the reliability of the connection and reduce the impact on the diameter of the fluid channel at the connection, which helps to maintain an appropriate flow rate or flow rate of powder or liquid medicine.

[0050] Reference Figure 1 and Figure 5 In order to further improve the sealing and reliability of the connection between the catheter body 10 and the connector 30, the connecting piece 20 includes a bite section 21 and an extension section 22 connected to the bite section 21. The inner cavity shape of the bite section 21 is adapted to the outer shape of the connecting section 11, and the extension section 22 is sleeved on the outer periphery of the drainage section 12.

[0051] The present invention further provides an injection device, which includes a medical catheter 100. The specific structure of the medical catheter 100 is referred to the above embodiment. Since the injection device provided by the present invention includes all solutions of all embodiments of the above medical catheter 100, it has at least the same technical effects as the above medical catheter 100, which will not be elaborated here one by one.

[0052] Reference Figure 7 In one embodiment, the injection device further includes an air supply device 200 and a connector 300. The connector 300 is mounted on the air supply device 200. The air inlet of the connector 300 communicates with the air supply port of the air supply device 200. The powder inlet of the connector 300 is adapted to connect to a powder container 400. The connector 30 at the proximal end of the medical catheter 100 communicates with the powder outlet of the connector 300. The distal end of the medical catheter 100 is adapted to extend into the target injection site. A blower is provided within the air supply device 200.

[0053] In order to improve the convenience of connecting the connector 300 with the medical tube 100 and the air supply device 200, in one embodiment, the powder outlet and the air inlet of the connector 300 can be provided with connection interfaces to respectively connect the medical tube 100 and the air supply device 200 through the two connection interfaces.

[0054] In this embodiment, a sealing gasket is provided between the end of the connection interface and the inner cavity wall of the connector 300. This arrangement can effectively ensure the sealing of the connection and prevent drug leakage.

[0055] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by utilizing the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A medical catheter, characterized in that: include: a catheter body, wherein a proximal end of the catheter body is provided with a connecting section; a connecting piece, sleeved on the outer circumference of the connecting section, wherein the inner cavity wall of the connecting piece is provided with a clamping portion corresponding to the position of the connecting section; and A connector, one end of which is provided with a mating portion extending into the connecting section, the clamping portion cooperates with the mating portion to clamp and fix the connecting section between the two, and the other end of the connector is suitable for connecting to a matching device.

2. The medical catheter according to claim 1, wherein The clamping portion is an internal thread, the matching portion is an external thread, and the catheter body is threadedly connected to the joint.

3. The medical catheter according to claim 1, wherein The clamping portion is a plurality of protrusions, the matching portion is a plurality of slots, the plurality of protrusions are connected and adapted to the plurality of slots in a one-to-one manner, and the conduit body is fixedly connected and fixed to the connector.

4. The medical catheter according to claim 1, wherein The connecting section is in a flared shape.

5. The medical catheter according to claim 4, wherein: The catheter body includes a drainage section connected to the connecting section. The inner diameter of the connecting section is larger than the inner diameter of the drainage section, and the outer diameter of the connecting section is larger than the outer diameter of the drainage section.

6. The medical catheter according to claim 5, wherein The connecting piece includes a bite section and an extension section connected to the bite section. The inner cavity shape of the bite section is adapted to the outer shape of the connecting section. The extension section is sleeved on the outer circumference of the drainage section.

7. The medical catheter according to claim 6, wherein: The catheter body is made of PTFE material.

8. An injection device, characterized in that: include: Air supply device; A connector is provided on the air supply device, the air inlet of the connector is connected to the air supply port of the air supply device, and the powder inlet of the connector is suitable for connecting to a powder container; as well as The medical catheter according to any one of claims 1 to 7, wherein the connector at the proximal end of the medical catheter is connected to the powder outlet of the connector, and the distal end of the medical catheter is adapted to extend into a target injection site.

9. The injection device according to claim 8, wherein The powder outlet and the air inlet of the connector are both provided with connection interfaces, so as to respectively connect the medical tube and the air supply device through the two connection interfaces.

10. The injection device according to claim 9, wherein A sealing gasket is provided between the end of the connection interface and the inner cavity wall of the connector.

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