Connecting piece for medical catheter and extension catheter

Abstract

The utility model relates to the technical field of medical instruments, and provides a connecting piece for a medical catheter and an extension catheter, the two ends of the connecting piece for the medical catheter are used for connecting the medical catheter and a medical slender body, and the connecting piece is provided with a plurality of hollow structures which are arranged along the length direction of the connecting piece so that the connecting piece can be bent. The connecting piece is provided with the hollow structure in the length direction, so that the rigidity of the connecting piece is reduced, certain pushing performance of the connecting piece is guaranteed, meanwhile, the flexibility of the connecting piece is improved, and therefore the pushing performance and operability of the connecting piece for the medical catheter are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially relates to the connecting piece and extension catheter for medical catheter. BACKGROUND

[0002] In the field of medical devices, many diseases are caused by the presence of undesirable material in blood vessels and heart chambers, most notably clots or thrombi. Clots within blood vessels can be formed from aggregates of blood cells, collagen, cholesterol, plaque, fat, calcified plaque, air bubbles, arterial tissue, proteins (e.g., fibrin), and / or other various debris or combinations thereof. For example, clots can lodge in a stenotic region of a blood vessel supplying a major organ, thus, resulting in a loss of oxygen-rich blood flow to surrounding tissue, causing local cell death or microinfarction. For example, cerebral microinfarction is ischemic stroke, which often results in confusion, speech impairment, paralysis, visual impairment, balance impairment, and even death; for another example, in the heart, clots can cause myocardial infarction, i.e., heart attack. If clots are not treated, there is a potentially life-threatening danger. Therefore, the presence of clots in blood vessels requires immediate medical intervention. Extension catheters treat clots by suctioning them into the catheter, and the design of the connecting piece in the extension catheter is critical to the overall performance of the extension catheter, as it needs to have sufficient flexibility and pushability to smoothly pass through curved blood vessels, while also having sufficient strength to withstand the pulling and torsional forces during operation.

[0003] In the related art, the connecting piece can meet the basic requirements, but cannot guarantee the precision and quality of the connecting piece, and defects and stress concentration are prone to occur, thereby affecting the flexibility and pushability of the connecting piece. The conventional connecting piece is not flexible enough to adapt to the complex bending and stenosis of the diseased blood vessels, which easily affects the pushability and operability of the catheter. SUMMARY

[0004] The utility model aims at least to solve one of the technical problems in the related art. To this end, the utility model provides a connecting piece for a medical catheter, aiming to improve the flexibility of the connecting piece.

[0005] The utility model further provides an extension catheter.

[0006] According to the connecting piece for a medical catheter of the first aspect of the utility model, the two ends of the connecting piece are used to connect the medical catheter and the medical elongated body, the connecting piece has a plurality of hollow structures arranged along the length direction thereof, so that the connecting piece can be bent.

[0007] The connecting piece for a medical catheter has a hollow structure along the length direction, so that the rigidity of the connecting piece is reduced, the softness of the connecting piece is improved, and the advancing property and the operability of the connecting piece for the medical catheter are improved.

[0008] According to an embodiment of the utility model, the hollow structure is a plurality of open grooves, and the plurality of open grooves are arranged at intervals along the length direction of the connecting piece.

[0009] According to an embodiment of the utility model, the connecting piece comprises a fishbone segment and an extension segment connected with each other, one end of the extension segment away from the fishbone segment is used for being connected with the medical catheter, and a plurality of open grooves are arranged at intervals along the length direction of the fishbone segment.

[0010] According to an embodiment of the utility model, one end of the extension segment away from the fishbone segment is provided with a cutting gap, and the cutting gap is used for inserting the medical elongated body.

[0011] According to an embodiment of the utility model, the extension segment is provided with a clamping hole, and the clamping hole is used for clamping the medical catheter.

[0012] According to an embodiment of the utility model, the hollow structure is a spiral cutting hollow structure.

[0013] According to an embodiment of the utility model, the connecting piece comprises a spiral segment and a fixed segment connected with each other, the fixed segment is provided with a clamping hole, and the clamping hole is used for clamping the medical catheter.

[0014] The extension catheter according to the second aspect of the utility model comprises:

[0015] A catheter seat;

[0016] A medical elongated body, a proximal end of the medical elongated body is connected to the catheter seat;

[0017] The connecting piece for a medical catheter, the connecting piece is connected to a distal end of the medical elongated body;

[0018] A medical catheter, a proximal end of the medical catheter is connected to one end of the connecting piece away from the medical elongated body.

[0019] According to an embodiment of the utility model, the medical catheter comprises an outer tube and an inner tube sleeved with each other, and at least part of the connecting piece is clamped between the outer tube and the inner tube.

[0020] According to an embodiment of the utility model, the extension catheter further comprises:

[0021] a balloon, the balloon being disposed in an overlapping region of the medical catheter, the connector for the medical catheter, and the medical elongated body;

[0022] The medical elongated body is a hypotube, a catheter seat is provided with a lumen communicating with a lumen of the hypotube, and the catheter seat is used for connecting an external device to inflate the balloon.

[0023] The medical elongated body can provide structural support, pushing force, help the medical catheter to smoothly advance during an interventional operation, and provide a passage between the balloon and the catheter seat for balloon inflation.

[0024] According to an embodiment of the present application, the medical catheter comprises a wire, the wire being clamped between the outer tube and the inner tube and extending along the extension direction of the outer tube and the inner tube.

[0025] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings needed to be used in the embodiment or related art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0027] Figure 1 is a structural schematic diagram of an extension catheter provided by an embodiment of the present application.

[0028] Figure 2 is Figure 1 is a local enlarged view of A in FIG.

[0029] Figure 3 is a first perspective structural schematic diagram of a connector for a fishbone-shaped medical catheter provided by an embodiment of the present application.

[0030] Figure 4 is a second perspective structural schematic diagram of a connector for a fishbone-shaped medical catheter provided by an embodiment of the present application.

[0031] Figure 5It is the structural schematic view of the extension catheter provided by another embodiment of the utility model.

[0032] Figure 6 It is Figure 5 The local enlarged view at B.

[0033] Figure 7 It is the structural schematic view of the connecting piece for the medical catheter imitating snake bone provided by the embodiment of the utility model.

[0034] Figure 8 It is the structural schematic view of the connecting piece for the medical catheter imitating snake bone provided by the embodiment of the utility model.

[0035] Reference signs:

[0036] 1, catheter seat;2, medical elongated body;21, dispensing hole;3, connecting piece;31, fishbone segment;311, open slot;32, extension segment;321, cutting gap;322, clamping hole;33, spiral segment;34, fixed segment;4, medical catheter;41, outer tube;42, inner tube;43, metal wire;44, developing structure;5, balloon. Specific implementation

[0037] The embodiment of the utility model will be further described in detail below in combination with the drawings and the embodiment. The following embodiment is used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0038] In the description of the embodiment of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship based on the drawing shown, and is only for the convenience of describing the embodiment of the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiment of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the embodiment of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the embodiment of the utility model can be understood according to the specific circumstances.

[0040] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium.

[0041] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0042] According to the first aspect of the present application, the two ends of the connecting piece 3 for medical catheter are used to connect two medical catheters, and the connecting piece 3 has a plurality of hollow structures arranged along the length direction thereof, so that the connecting piece 3 can be bent.

[0043] According to the connecting piece 3 for medical catheter of the present application, the connecting piece 3 is provided with a hollow structure along the length direction, so as to reduce the rigidity of the connecting piece 3, ensure the certain pushing performance of the connecting piece 3, and improve the softness of the connecting piece 3, thereby improving the advancing property and operability of the connecting piece 3 for medical catheter.

[0044] Please refer to Figures 1 to 8 According to the second aspect of the present application, the extension catheter comprises a catheter seat 1, a medical elongated body 2, a connecting piece 3 for medical catheter (hereinafter referred to as connecting piece 3) and a medical catheter 4, the catheter seat 1 can be used as the port of the balloon 5; the proximal end of the medical elongated body 2 is connected to the catheter seat 1; the connecting piece 3 is connected to the distal end of the medical elongated body 2, and the connecting piece 3 is provided with a hollow structure along the length direction; the proximal end of the medical catheter 4 is connected to the distal end of the connecting piece 3, and the medical catheter 4 comprises an outer tube 41 and an inner tube 42 which are sleeved, and at least part of the connecting piece 3 is clamped between the outer tube 41 and the inner tube 42.

[0045] It should be noted that the proximal end of the interventional catheter close to the medical staff is defined as the proximal end, and vice versa.

[0046] According to one embodiment of the present application, the medical catheter 4 comprises an outer tube 41 and an inner tube 42 which are sleeved, and at least part of the connecting piece 3 is clamped between the outer tube 41 and the inner tube 42.

[0047] According to one embodiment of the present application, the extension catheter further comprises a balloon 5, the balloon 5 is arranged in the overlapping area of the medical catheter 4, the connecting piece 3 for the medical catheter and the medical elongated body 2; the medical elongated body 2 is a hypotube, the catheter seat 1 is provided with a lumen which is communicated with the lumen of the hypotube, and the catheter seat 1 is used for connecting an external device to inflate the balloon 5. Of course, in other embodiments, the extension catheter can also not be provided with the balloon 5, and the specific adjustment is made according to the actual needs, which is not limited herein.

[0048] According to the connecting piece 3 for the medical catheter of the present application, the external equipment is connected through the catheter seat 1 to control the connecting piece 3 for the medical catheter. The medical elongated body 2 can provide structural support, pushing force and a passage between the balloon 5 and the catheter seat 1 to help the medical catheter 4 to smoothly advance in the blood vessel and the inflation of the balloon 5. The connecting piece 3 is used for connecting the medical elongated body 2 and the medical catheter 4, one end of the medical elongated body 2 is connected and fixed with the connecting piece 3, and at least part of the connecting piece 3 is clamped between the outer tube 41 and the inner tube 42 of the medical catheter 4 to improve the connection stability and reduce the risk of loosening. At the same time, the connecting piece 3 is provided with a hollow structure along the length direction to reduce the rigidity of the connecting piece 3, to ensure the pushing performance of the connecting piece 3 while improving the flexibility of the connecting piece 3, thereby improving the advancing property and the operability of the connecting piece 3 for the medical catheter.

[0049] In the present embodiment, the extension catheter and the matching guide catheter form a suction passage after the balloon 5 is inflated, the catheter seat of the suction catheter can be connected to a suction device, and the suction device is used to generate negative pressure to suck out the thrombus. The suction device includes but is not limited to basic components such as pressure extension tube, suction syringe, suction filter screen, etc.

[0050] Optionally, the connecting piece 3 is made of metal material to ensure a certain rigidity, which can enhance the pushing force of the connecting piece 3 to help the connecting piece 3 to better penetrate the blood vessel and reach the thrombus position. At the same time, the metal connecting piece 3 helps to improve the kink resistance of the extension catheter, which is beneficial to maintain the integrity and patency of the extension catheter in the blood vessel. Optionally, the connecting piece 3 is made of nickel-titanium alloy material, which has excellent elasticity and biocompatibility to adapt to the complex bending and narrow blood vessels. The use of light weight and high strength metal can reduce the weight of the connecting piece 3 while improving its strength and durability. The connection mode of the connecting piece 3 with the medical elongated body 2 and the medical catheter 4 can be welding, bonding, hot melt pressure bonding, etc., which is not limited herein.

[0051] For example, the connector 3 is at least partially sandwiched between the outer tube 41 and the inner tube 42. That is, one end of the outer tube 41 is sleeved on the outside of the connector 3. The outer tube 41 is made of polymer material. The outer tube 41 is heated to melt it, thereby pressing it against the outer wall of the connector 3 to connect and fix the outer tube 41 and the connector 3.

[0052] like Figures 2 to 4 As shown, according to one embodiment of this utility model, the hollow structure consists of multiple opening slots 311, which are spaced apart along the length of the connector 3. It is understood that the connector 3 has a fishbone-like structure. After opening multiple slots 311, the diameter at the slot positions is smaller, thereby reducing rigidity and further enhancing the flexibility and passability of the connector 3. This reduces the possibility of kinking and breakage at the connection between the connector 3 and the medical slender body 2, making insertion and withdrawal easier during interventional surgery, reducing damage to blood vessels, and improving the success rate and safety of the surgery. Optionally, the molten outer tube 41 can also be filled into the opening slots 311 to form a snap-fit ​​structure, improving the connection stability between the outer tube 41 and the connector 3.

[0053] According to one embodiment of the present invention, the connector 3 includes a fishbone segment 31 and an extension segment 32 connected together. The end of the extension segment 32 away from the fishbone segment 31 is connected to the medical elongated body 2. The fishbone segment 31 is provided with a plurality of opening slots 311 spaced apart along its length. In this embodiment, the fishbone segment 31 and the extension segment 32 are integrally formed to ensure connection strength and stability. The fishbone segment 31 has a fishbone-like structure, that is, it is provided with a plurality of opening slots 311 spaced apart to reduce rigidity. In one embodiment, the plurality of opening slots 311 are all located on the same side of the fishbone segment 31. Since the diameter of the medical catheter 4 is generally larger than the diameter of the medical elongated body 2, the diameter of the fishbone segment 31 is set to be larger than the diameter of the extension segment 32 to facilitate the connection between the fishbone segment 31 and the medical catheter 4, and to facilitate the connection between the extension segment 32 and the medical elongated body 2. Optionally, the diameter of the extension segment 32 gradually decreases in the direction away from the fishbone segment 31 to reduce the step-like abruptness between the connector 3 for the medical catheter and the medical elongated body 2, facilitating the insertion and withdrawal of the device. According to one embodiment of the present invention, a cutting slit 321 is provided at the end of the extension segment 32 away from the fishbone segment 31. One end of the medical elongated body 2 is inserted into the cutting slit 321, and then the medical elongated body 2 and the extension segment 32 can be welded together to improve the connection stability. By pre-inserting one end of the medical elongated body 2 into the cutting slit 321, positioning and installation are facilitated, improving installation convenience. At the same time, it helps to increase the contact area between the medical elongated body 2 and the extension segment 32, resulting in a more stable connection.

[0054] According to one embodiment of the present application, the extension section 32 is provided with a clamping hole 322, and a portion of the outer tube 41 is clamped in the clamping hole 322. Exemplarily, the molten outer tube 41 can be partially filled in the clamping hole 322 to form a clamping structure, thereby improving the connection stability of the outer tube 41 and the connecting piece 3.

[0055] As shown in Figures 5 to 8 According to one embodiment of the present application, the hollow structure is a spiral cutting hollow. In this embodiment, the connecting piece 3 has a snake bone structure, that is, the connecting piece 3 is spiral cutting hollow, which can reduce the rigidity, further enhance the flexibility and passability of the connecting piece 3, reduce the possibility of kinking and breaking at the connection between the connecting piece 3 and the medical elongated body 2, and is easier to be inserted and withdrawn during the interventional operation, thereby reducing the damage to the blood vessel and improving the success rate and safety of the operation. Alternatively, the medical elongated body 2 can be inserted into the hollow inner wall of the connecting piece 3 and welded to the hollow inner wall. Of course, the medical elongated body 2 can also be welded to the outer wall of the connecting piece 3, which is not limited herein.

[0056] According to one embodiment of the present application, the connecting piece 3 comprises a spiral section 33 and a fixed section 34 connected with each other, the fixed section 34 is provided with a clamping hole 322, and a portion of the outer tube 41 is clamped in the clamping hole 322. Exemplarily, the molten outer tube 41 can be partially filled in the clamping hole 322 to form a clamping structure, thereby improving the connection stability of the outer tube 41 and the connecting piece 3.

[0057] According to one embodiment of the present application, the medical catheter 4 comprises a metal wire 43, the metal wire 43 is clamped between the outer tube 41 and the inner tube 42 and extends along the extension direction of the outer tube 41 and the inner tube 42. It can be understood that the metal wire 43 forms a metal woven structure between the outer tube 41 and the inner tube 42, which helps to improve the pushability and folding resistance of the medical catheter 4, so as to be better arranged in the blood vessel.

[0058] In one embodiment, the medical catheter 4 comprises a developing structure 44, which is arranged at one end of the outer tube 41 and the inner tube 42 away from the connecting piece 3. Alternatively, the developing structure 44 can be connected to one end of the outer tube 41, or can be clamped between the outer tube 41 and the inner tube 42, which is not limited herein. For example, the developing structure 44 is a developing ring, and the developing structure 44 makes the medical catheter 4 have a certain developing property under the X-ray machine, which is convenient for the doctor to position the position and direction of the medical catheter 4 during the operation.

[0059] In one embodiment, the outer wall of the outer tube 41 is coated with a lubricating coating. Exemplarily, the outer tube 41 is formed after the surface of the connecting piece 3 is covered with a high polymer material, and the lubricating coating is added to the outer wall of the outer tube 41, which can reduce the friction between the outer tube 41 and the blood vessel wall, improve the pushability and operability of the extension catheter, and reduce the damage to the blood vessel.

[0060] According to one embodiment of the utility model, the medical elongated body 2 is connected to the one end of the catheter seat 1 and a dot glue mouth is arranged, so that the dot glue mouth is filled with fixed glue in advance, when the medical elongated body 2 is inserted into the catheter seat 1, the fixed glue is bonded and fixed with the catheter seat 1, and the operation is convenient.

[0061] The medical device according to the third aspect of the utility model comprises a body and the above-mentioned extension catheter, and the extension catheter is connected with the body.

[0062] The medical device according to the embodiment of the utility model comprises the above-mentioned extension catheter, thus having all the technical effects of the above-mentioned extension catheter, which will not be repeated here.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the utility model, rather than limit the utility model. Although the utility model is described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical scheme of the utility model do not deviate from the spirit and scope of the utility model, and should be covered in the scope of claims of the utility model.

Claims

1. A connector for a medical catheter, characterized in that, The connector has two ends for connecting a medical catheter and a medical slender body. The connector has multiple hollow structures arranged along its length to allow it to be bent.

2. The connector for medical catheters according to claim 1, characterized in that, The hollow structure consists of multiple open slots, which are spaced apart along the length of the connector.

3. The connector for medical catheters according to claim 2, characterized in that, The connector includes a fishbone segment and an extension segment connected together. The end of the extension segment away from the fishbone segment is used to connect to the medical catheter. The fishbone segment is provided with a plurality of opening slots spaced apart along its length.

4. The connector for medical catheters according to claim 3, characterized in that, The extension section has a cutting slit at the end away from the fishbone section, and the cutting slit is used to insert the medical slender body.

5. The connector for medical catheters according to claim 3, characterized in that, The extension section has a locking hole for engaging the medical catheter.

6. The connector for medical catheters according to claim 1, characterized in that, The hollow structure is a spiral cut.

7. The connector for medical catheters according to claim 6, characterized in that, The connector includes a connected spiral section and a fixed section. The fixed section has a locking hole for engaging the medical catheter.

8. An extension catheter, characterized in that, include: Conduit seat; A medical elongated body, the proximal end of which is connected to the catheter hub; The connector for a medical catheter as described in any one of claims 1 to 7 is connected to the distal end of the medical elongated body; A medical catheter, the proximal end of which is connected to the end of the connector away from the medical elongated body.

9. The extension catheter according to claim 8, characterized in that, The medical catheter includes an outer tube and an inner tube that are nested together, and at least a portion of the connector is sandwiched between the outer tube and the inner tube.

10. The extension catheter according to claim 8, characterized in that, Also includes: A balloon, wherein the balloon is disposed in the overlapping area of ​​a medical catheter, a connector for the medical catheter, and a medical slender body; The medical slender body is a hypochlorous tube, and the catheter seat has a cavity that connects to the cavity of the hypochlorous tube. The catheter seat is used to connect to an external device to inflate the balloon.

11. The extension catheter according to claim 9, characterized in that, The medical catheter includes a metal wire sandwiched between the outer tube and the inner tube, and extends along the extension direction of the outer tube and the inner tube.

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