Balloon dilatation catheter

Abstract

The utility model belongs to the field of medical instruments, and particularly relates to a balloon dilatation catheter which comprises a first catheter body, a balloon body is installed at one end of the outer surface of the first catheter body, side grooves are formed in the two sides of the interior of the first catheter body, positioning assemblies are installed on the inner walls of the side grooves, inner tubes are installed on the side walls of the positioning assemblies, and the inner tubes are connected with the balloon body. The end of the inner pipe is sleeved with a one-way pipe, through holes are formed in the two sides of the one-way pipe, the outer surface of one end of the one-way pipe is sleeved with a sliding sleeve, and in the natural state, the through holes are located in the sliding sleeve. Through mutual cooperation of the inner tube, the one-way tube, the fixing assembly, the miniature springs and other structures, a gas-liquid mixture of air and a contrast agent can be conveyed to the balloon body to support the balloon body, and after conveying of the gas and the contrast agent is stopped, the two miniature springs can rebound rapidly, so that the one-way tube and the through hole are blocked by the sliding sleeve, and the balloon body is supported by the sliding sleeve. Consequently, the contrast agent can be prevented from flowing back, and the contrast result is prevented from being

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a balloon dilatation catheter. Background Art

[0002] For patients with coronary artery or peripheral vascular stenosis, the general treatment is percutaneous transluminal angioplasty, which is to deliver instruments (balloons, stents, etc.) along the vascular pathway to the target vascular stenosis area, and then perform balloon dilation on the target vascular area and implant the stent. When the existing balloon dilation catheter is propping up the blood vessel, it is necessary to connect an air pump through one end of the catheter to fill the balloon with gas and contrast agent through the air pump.

[0003] The existing patent (publication number: CN208511692U) discloses a balloon dilatation catheter. When the device is in use, the balloon and the catheter are bidirectionally connected. When the air pump stops delivering gas, there is a risk of backflow of the contrast agent, resulting in inaccurate contrast effects and the balloon cannot be fully expanded. Utility Model Content

[0004] The utility model aims to provide a balloon dilatation catheter which can prevent the contrast agent from flowing back.

[0005] To this end, the technical solution adopted in this utility model is:

[0006] A balloon dilatation catheter, comprising:

[0007] A first catheter, wherein a balloon body is installed on one end of the outer surface of the first catheter, side grooves are provided on both sides of the interior of the first catheter, a positioning assembly is installed on the inner wall of the side groove, an inner tube is installed on the side wall of the positioning assembly, a one-way tube is sleeved on the end of the inner tube, through holes are provided on both sides of the one-way tube, a sliding sleeve is sleeved on the outer surface of one end of the one-way tube, and in a natural state, the through hole is located inside the sliding sleeve;

[0008] A fixed collar is installed on the outer surface of the one-way tube, and side blocks are fixedly connected to both sides of the fixed collar. A micro spring is fixedly connected to the side wall of the side block, and the other end of the micro spring is connected to the inner wall of the side groove.

[0009] Based on the above technical solution, its use principle and the technical effects produced are as follows:

[0010] When it is needed, first insert the guide head into the patient's blood vessel, then move the entire device to the required expansion position, then connect the air pump to the first slot, and connect the contrast agent to the second slot. At this time, turn on the air pump to fill the contrast agent and air into the interior of the first catheter. At this time, the gas and liquid mixture will be transported to the inner tube and enter the one-way tube through the inner tube. Since one end of the one-way tube is configured to be sealed, the gas-liquid mixture will squeeze and impact the one-way tube. Due to the configuration of the micro-springs on both sides, when the gas-liquid mixture squeezes and impacts the one-way tube, it will drive the fixed sleeve and the side blocks arranged on both sides thereof to squeeze the micro-springs and shrink them, so that the fixed sleeve can drive the one-way tube to move horizontally in the sliding sleeve. At this time, the through hole opened on the one-way tube is separated from the sliding sleeve and moves. When the balloon body is moved to the inside, the blockage of the through hole can be released. At this time, gas and liquid will enter the balloon body to prop it up. When the delivery of gas and contrast agent is stopped, the two micro-springs will rebound quickly and make the fixed ring drive the one-way tube to reset. At this time, the through hole will be blocked by the sliding sleeve, thereby preventing the contrast agent in the balloon body from flowing back and affecting the angiography results. When the expansion work is completed, two flexible steel wires are inserted into the inner grooves opened on both sides of the first catheter. When the two flexible steel wires pass through the positioning frame, the two side blocks can be squeezed forward, thereby causing the micro-spring to contract and the through hole to move to the balloon body. At this time, the gas and contrast agent are pumped away through the first slot and the second slot with the help of an air pump to complete the removal of the device.

[0011] In a preferred example, the utility model can be further configured as follows: the inner tube is set to be a hollow cylinder, the hollow diameter of the inner tube decreases along the direction approaching the one-way tube, and a tapered surface is formed on the outer surface.

[0012] In a preferred example, the utility model can be further configured as follows: the outer edge diameter of the narrowed opening of the inner tube is equal to the inner edge diameter of the one-way tube, and the narrowed opening of the inner tube is extended to the inside of the one-way tube.

[0013] In a preferred example, the utility model can be further configured as follows: a first slot is formed at one end of the first catheter away from the balloon body, and a first sealing plug is installed inside the first slot.

[0014] In a preferred example, the utility model can be further configured as follows: a second conduit is installed on one side of the outer surface of the first conduit, a second slot is opened at the free end of the second conduit, and a second sealing plug is installed inside the second slot.

[0015] In a preferred example, the utility model can be further configured as follows: inner grooves are opened on both sides of the first conduit along its length direction, one end of the inner groove passes through the first conduit, and the other end of the inner groove extends to the side groove and is connected with the side groove.

[0016] In a preferred example, the utility model can be further configured as follows: the number of the positioning components is two, and the two positioning components are symmetrically installed on both sides of the inner tube.

[0017] In a preferred example, the utility model can be further configured as follows: the positioning assembly includes a fixing ring installed on the inner wall of the side groove, a positioning frame is installed inside the fixing ring, a flexible steel wire is passed through the interior of the positioning frame, and the flexible steel wire is passed through the inner groove.

[0018] In a preferred example, the utility model can be further configured as follows: a guide head is installed at one end of the balloon body, and the overall shape of the guide head is set to be a cone, and the surface of the cone is an arc surface.

[0019] In a preferred example, the utility model can be further configured as follows: the one-way tube is a hollow cylinder with one end open, the outer diameter of the one-way tube is equal to the inner diameter of the sliding sleeve, and the port of the one-way tube at one end inside the sliding sleeve is sealed.

[0020] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0021] Fixed connection refers to a connection in which parts or components are fixed without any relative movement. There are two types of connection: detachable and non-detachable.

[0022] (1) A removable connection is a connection that uses screws, splines, wedge pins, etc. to hold parts together. This type of connection can be disassembled for maintenance without damaging the parts. However, the specifications of the connectors used must be correct (such as the length of the bolts, keys, and wedge pins) and they must be properly tightened.

[0023] (2) Non-detachable connections mainly refer to welding, riveting and tenoning. Since they need to be disassembled by forging, sawing or oxygen cutting for maintenance or replacement, spare parts generally cannot be reused. At the same time, when making connections, attention should be paid to process quality, technical inspection and remedial measures (such as calibration, polishing, etc.);

[0024] An active connection is a connection in which parts or components are fixed so that they can move relative to each other.

[0025] The above technical solution of the utility model has the following beneficial technical effects:

[0026] 1. In the utility model, by cooperating with each other of the inner tube, the one-way tube, the fixing assembly, the micro spring and other structures, the gas-liquid mixture of air and contrast agent can be delivered to the balloon body to prop it up, and when the delivery of gas and contrast agent is stopped, the two micro springs will rebound quickly, so that the one-way tube and the through hole are blocked by the sliding sleeve, thereby preventing the contrast agent from flowing back and affecting the angiography results.

[0027] 2. In the utility model, by cooperating with each other of the two flexible steel wires, the fixing assembly, the inner groove and other structures, the side block can be squeezed to make the micro spring contract again, and the through hole can be moved into the balloon body, so that the gas and contrast agent can be drawn out through the first slot and the second slot, and the device can be quickly removed to avoid prolonged ischemia of the distal myocardium or tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0029] Figure 2 It is a three-dimensional schematic diagram of the first conduit and the second conduit structure of the utility model;

[0030] Figure 3 It is a three-dimensional schematic diagram of the internal structure of the first conduit of the utility model;

[0031] Figure 4 It is a three-dimensional schematic diagram of the one-way pipe structure of the utility model.

[0032] Reference numerals:

[0033] 1. First catheter; 2. Second catheter; 3. Balloon body; 4. First slot; 5. Second slot; 6. First sealing plug; 7. Second sealing plug; 8. Side groove; 9. Inner tube; 101. Sliding sleeve; 102. One-way tube; 103. Through hole; 104. Fixed collar; 105. Side block; 106. Micro spring; 11. Inner groove; 12. Fixed ring; 13. Positioning frame; 14. Guide head; 15. Flexible steel wire. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure. It should be noted that the embodiments of the present utility model and the features in the embodiments can be combined with each other without conflict.

[0035] According to the concept of this application, Figures 1 to 4An embodiment of a balloon dilatation catheter for preventing contrast agent reflux is described below. Specifically, the balloon dilatation catheter is constructed as an integrated structure, which has components such as a first catheter 1 and a fixed collar 104. Through the cooperation of the inner tube 9, the one-way tube 102, the fixing assembly, the micro spring 106 and other structures, the gas-liquid mixture of air and contrast agent can be delivered to the balloon body 3 to prop it up, and when the delivery of gas and contrast agent is stopped, the two micro springs 106 will rebound quickly, so that the one-way tube 102 and the through hole 103 are blocked by the sliding sleeve 101, thereby preventing the contrast agent from refluxing and avoiding affecting the angiography results.

[0036] Combination Figure 1-4 As shown, the utility model provides a balloon dilatation catheter, comprising:

[0037] A first catheter 1, a balloon body 3 is installed on one end of the outer surface of the first catheter 1, side grooves 8 are provided on both sides of the interior of the first catheter 1, a positioning assembly is installed on the inner wall of the side groove 8, an inner tube 9 is installed on the side wall of the positioning assembly, a one-way tube 102 is sleeved on the end of the inner tube 9, through holes 103 are provided on both sides of the one-way tube 102, a sliding sleeve 101 is sleeved on the outer surface of one end of the one-way tube 102, and in a natural state, the through hole 103 is located inside the sliding sleeve 101;

[0038] A fixed collar 104 is installed on the outer surface of the one-way tube 102 , and side blocks 105 are fixedly connected to both sides of the fixed collar 104 . A micro spring 106 is fixedly connected to the side wall of the side block 105 , and the other end of the micro spring 106 is connected to the inner wall of the side groove 8 .

[0039] According to the technical solution of this embodiment, the inner tube 9 is configured to be a hollow cylinder, the hollow diameter of the inner tube 9 decreases along the direction approaching the one-way tube 102, and a conical surface is formed on the outer surface. The outer edge diameter of the opening of the inner tube 9 after the reduction is equal to the inner edge diameter of the one-way tube 102, and the opening of the inner tube 9 after the reduction is extended to the inside of the one-way tube 102. The inner tube 9 is configured to facilitate the delivery of the contrast agent into the one-way tube 102.

[0040] According to the technical solution of this embodiment, a first slot 4 is opened at one end of the first catheter 1 away from the balloon body 3, and a first sealing plug 6 is installed inside the first slot 4. When it is necessary to deliver contrast agent, an external air pump is inserted into the first slot 4 to deliver the contrast agent to the balloon body. When not in use, the first sealing plug 6 can be inserted into the first slot 4 to seal it.

[0041] Furthermore, a second catheter 2 is installed on one side of the outer surface of the first catheter 1, a second slot 5 is opened at the free end of the second catheter 2, and a second sealing plug 7 is installed inside the second slot 5. The second catheter 2 is mainly used to connect with the contrast agent, so that when the air pump is started, the gas-liquid mixture of air and contrast agent is blown into the one-way tube 102.

[0042] According to the technical solution of this embodiment, there are two positioning components, and the two positioning components are symmetrically installed on both sides of the inner tube 9. The positioning component includes a fixing ring 12 installed on the inner wall of the side groove 8, and a positioning frame 13 is installed inside the fixing ring 12. A flexible steel wire 15 is passed through the interior of the positioning frame 13. The positioning component is set to facilitate positioning and passing the flexible steel wire 15.

[0043] According to the technical solution of this embodiment, inner grooves 11 are provided on both sides of the interior of the first catheter 1 along its length direction. One end of the inner groove 11 passes through the first catheter 1, and the other end of the inner groove 11 extends to the side groove 8 and is connected with the side groove 8. The inner groove 11 is provided to facilitate the insertion of the flexible steel wire 15. When the expansion work is completed, the two flexible steel wires 15 are inserted into the inner grooves 11 provided on both sides of the interior of the first catheter 1. When the two flexible steel wires 15 pass through the positioning frame 13, the two side blocks 105 can be squeezed forward, thereby contracting the micro spring 106 and moving the through hole 103 to the balloon body 3. At this time, the gas and contrast agent are extracted through the first slot 4 and the second slot 5, and the device removal work can be completed.

[0044] A guide head 14 is installed at one end of the balloon body 3, and the overall shape of the guide head 14 is set to be conical, and the surface of the cone is an arc surface. The guide head 14 is set to facilitate the insertion of the balloon body 3 into the blood vessel.

[0045] According to the technical solution of this embodiment, the one-way tube 102 is a hollow cylinder with one end open, the outer diameter of the one-way tube 102 is equal to the inner diameter of the sliding sleeve 101, and the port of the one-way tube 102 at one end inside the sliding sleeve 101 is sealed.

[0046] Specifically, when it is needed, firstly, the guide head 14 is inserted into the patient's blood vessel, and then the device is moved as a whole to the required expansion position, and then the air pump is connected to the first slot 4, and the contrast agent is connected to the second slot 5. At this time, the air pump is turned on to fill the contrast agent and air into the interior of the first catheter 1. At this time, the gas and liquid mixture will be transported to the inner tube 9 and enter the one-way tube 102 through the inner tube 9. Since one end of the one-way tube 102 is set to be sealed, the gas-liquid mixture will squeeze and impact the one-way tube 102. Due to the setting of the micro-springs 106 on both sides, when the gas-liquid mixture squeezes and impacts the one-way tube 102, it will drive the fixed ring 104 and the side blocks 105 set on both sides to squeeze the micro-spring 106 and shrink it, so that the fixed ring 104 can drive the one-way tube 102 to move horizontally in the sliding sleeve 101. At this time, the through hole 103 opened on the one-way tube 102 is separated from the sliding When the sleeve 101 moves to the interior of the balloon body 3, the closure of the through hole 103 can be released. At this time, gas and liquid will enter the balloon body 3 to prop it up. When the delivery of gas and contrast agent is stopped, the two micro springs 106 will rebound quickly, and the fixed ring 104 will drive the one-way tube 102 to reset. At this time, the through hole 103 will be blocked by the sliding sleeve 101, thereby preventing the contrast agent in the balloon body 3 from flowing back and affecting the angiography results. When the expansion work is completed, two flexible steel wires 15 are inserted into the inner grooves 11 opened on both sides of the first catheter 1. When the two flexible steel wires 15 pass through the positioning frame 13, the two side blocks 105 can be squeezed forward, thereby causing the micro springs 106 to contract and the through hole 103 to move to the balloon body 3. At this time, the gas and contrast agent are pumped away through the first slot 4 and the second slot 5 with the help of an air pump, and the device removal work can be completed.

[0047] The balloon dilatation catheter provided by the present invention is further described below in conjunction with the accompanying drawings and implementation examples.

[0048] A balloon dilatation catheter, comprising:

[0049] A first catheter 1, a balloon body 3 is installed on one end of the outer surface of the first catheter 1, side grooves 8 are provided on both sides of the interior of the first catheter 1, a positioning assembly is installed on the inner wall of the side groove 8, an inner tube 9 is installed on the side wall of the positioning assembly, a one-way tube 102 is sleeved on the end of the inner tube 9, through holes 103 are provided on both sides of the one-way tube 102, a sliding sleeve 101 is sleeved on the outer surface of one end of the one-way tube 102, and in a natural state, the through hole 103 is located inside the sliding sleeve 101;

[0050] A fixed collar 104 is installed on the outer surface of the one-way tube 102 , and side blocks 105 are fixedly connected to both sides of the fixed collar 104 . A micro spring 106 is fixedly connected to the side wall of the side block 105 , and the other end of the micro spring 106 is connected to the inner wall of the side groove 8 .

[0051] The working principle and use process of the utility model are as follows: first, the guide head 14 is inserted into the patient's blood vessel, and then the device is moved as a whole to the required expansion position, and then the air pump is connected to the first slot 4, and the contrast agent is connected to the second slot 5. At this time, the air pump is turned on to fill the contrast agent and air into the interior of the first catheter 1. At this time, the gas and liquid mixture will be transported to the inner tube 9 and enter the one-way tube 102 through the inner tube 9. Since one end of the one-way tube 102 is set to be sealed, the gas-liquid mixture will squeeze and impact the one-way tube 102. Due to the setting of the micro-springs 106 on both sides, when the gas-liquid mixture squeezes and impacts the one-way tube 102, it will drive the fixed ring 104 and the side blocks 105 set on both sides to squeeze the micro-spring 106 and shrink it, so that the fixed ring 104 can drive the one-way tube 102 to move horizontally in the sliding sleeve 101, and at this time the through hole 103 opened on the one-way tube 102 is disengaged. When the sliding sleeve 101 moves to the interior of the balloon body 3, the closure of the through hole 103 can be released. At this time, gas and liquid will enter the balloon body 3 to prop it up. When the delivery of gas and contrast agent is stopped, the two micro springs 106 will rebound quickly and make the fixed ring 104 drive the one-way tube 102 to reset. At this time, the through hole 103 will be blocked by the sliding sleeve 101 again, thereby preventing the contrast agent in the balloon body 3 from flowing back and affecting the angiography result. When the expansion work is completed, two flexible steel wires 15 are inserted into the inner grooves 11 opened on both sides of the first catheter 1. When the two flexible steel wires 15 pass through the positioning frame 13, the two side blocks 105 can be squeezed forward, thereby contracting the micro springs 106 and moving the through hole 103 to the balloon body 3. At this time, the gas and contrast agent are pumped away through the first slot 4 and the second slot 5 with the help of an air pump, and the removal of the device can be completed.

[0052] In the present utility model, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The term "and / or" used in this article includes any and all combinations of one or more related listed items. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0053] It should be noted that when an element is referred to as being "assembled on", "installed on", "fixed on" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0054] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation 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 one or more embodiments or examples in a suitable manner.

[0055] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A balloon dilatation catheter, characterized in that: include: A first catheter (1), wherein a balloon body (3) is mounted on one end of the outer surface of the first catheter (1), side grooves (8) are provided on both sides of the interior of the first catheter (1), a positioning assembly is provided on the inner wall of the side groove (8), an inner tube (9) is provided on the side wall of the positioning assembly, a one-way tube (102) is sleeved on the end of the inner tube (9), through holes (103) are provided on both sides of the one-way tube (102), a sliding sleeve (101) is sleeved on the outer surface of one end of the one-way tube (102), and in a natural state, the through hole (103) is located inside the sliding sleeve (101); A fixing collar (104) is installed on the outer surface of the one-way tube (102), and side blocks (105) are fixedly connected to both sides of the fixing collar (104), and a micro spring (106) is fixedly connected to the side wall of the side block (105), and the other end of the micro spring (106) is connected to the inner wall of the side groove (8).

2. A balloon dilatation catheter according to claim 1, characterized in that: The inner tube (9) is configured to be in a hollow cylindrical shape, the hollow diameter of the inner tube (9) decreases in a direction approaching the one-way tube (102), and a tapered surface is formed on the outer surface.

3. A balloon dilatation catheter according to claim 2, characterized in that: The outer diameter of the opening of the inner tube (9) after shrinkage is equal to the inner diameter of the one-way tube (102), and the opening of the inner tube (9) after shrinkage is extended to the inside of the one-way tube (102).

4. A balloon dilatation catheter according to claim 3, characterized in that: A first slot (4) is provided at one end of the first catheter (1) away from the balloon body (3), and a first sealing plug (6) is installed inside the first slot (4).

5. A balloon dilatation catheter according to claim 3, characterized in that: A second conduit (2) is installed on one side of the outer surface of the first conduit (1), a second slot (5) is provided at the free end of the second conduit (2), and a second sealing plug (7) is installed inside the second slot (5).

6. A balloon dilatation catheter according to claim 5, characterized in that: Inner grooves (11) are provided on both sides of the first conduit (1) along its length direction, one end of the inner groove (11) passes through the first conduit (1), and the other end of the inner groove (11) extends to the side groove (8) and is connected to the side groove (8).

7. A balloon dilatation catheter according to claim 6, characterized in that: The number of the positioning components is two, and the two positioning components are installed symmetrically on both sides of the inner tube (9).

8. A balloon dilatation catheter according to claim 7, characterized in that: The positioning assembly comprises a fixing ring (12) mounted on the inner wall of the side groove (8), a positioning frame (13) is mounted inside the fixing ring (12), a flexible steel wire (15) is passed through the interior of the positioning frame (13), and the flexible steel wire (15) passes through the inner groove (11).

9. The balloon dilatation catheter according to claim 7, characterized in that: A guide head (14) is installed at one end of the balloon body (3), and the overall shape of the guide head (14) is set to be a cone, and the surface of the cone is an arc surface.

10. The balloon dilatation catheter according to claim 9, characterized in that: The one-way tube (102) is a hollow cylinder with one end open. The outer diameter of the one-way tube (102) is equal to the inner diameter of the sliding sleeve (101), and the port of the one-way tube (102) located at one end inside the sliding sleeve (101) is sealed.

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