Drug coated balloon catheter

Abstract

The utility model discloses a medicine coating balloon catheter belongs to medicine instrument technical field, including second catheter, one end fixedly connected with micro air pump of second catheter, and the lateral wall of second catheter is fixedly connected with vertical rod, the utility model sets up sealing assembly, and sealing cylinder is removed with the driving of inserting rod, and sealing cylinder removes the movement of sealing washer and built -in ring, after sealing washer and built -in ring respectively remove and adhere to the lateral wall of inflatable balloon and external ring, rotate fixed screw again, and fixed screw rotation removes and drives fixed disc to be inserted to the inside of inserting rod, under the action of sealing cylinder, sealing washer and built -in ring, can carry out sealing protection operation to conical balloon, avoid the process of inserting conical balloon to the inside of patient's blood vessel subsequently, and the medicine coating of conical balloon surface is coated and merges into blood, guarantees the treatment effect of the medicine coating of conical balloon surface coating to the patient's pathological change position subsequently.

Description

Technical Field

[0001] This utility model belongs to the field of pharmaceutical device technology, specifically relating to drug-coated balloon catheters. Background Technology

[0002] A drug-eluting coronary balloon catheter is an interventional device used to treat coronary artery disease. Its main function is to dilate narrowed or blocked coronary arteries and release medication during dilation to prevent restenosis. The catheter is coated with medication, which is then released onto the vessel wall, reducing the risk of restenosis.

[0003] Existing technology uses tapered drug-coated balloon catheters, where a drug coating is applied to the surface of the tapered balloon. During subsequent insertion into a blood vessel, the drug coating on the tapered balloon can easily seep into the bloodstream. As the tapered balloon moves to the patient's lesion site, the amount of drug coating on its surface decreases, potentially affecting the treatment effect at the lesion site. In addition, an exhaust pipe is located on one side of the handle, which can affect the stability of the medical staff's grip on the handle, thereby affecting the stability of the entire device insertion. Utility Model Content

[0004] To address the problems mentioned in the background section, this invention provides a drug-coated balloon catheter that features a sealed, protective seal and stable grip.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a drug-coated balloon catheter, comprising a second catheter, a micro air pump fixedly connected to one end of the second catheter, a vertical rod fixedly connected to the side wall of the second catheter, an exhaust mechanism provided on the side wall of the second catheter and on one side of the vertical rod, a conical balloon fixedly connected to the outer side wall of the second catheter, an inflatable balloon fixedly connected to the periphery of the other end of the second catheter, a first catheter fixedly connected to the end of the inflatable balloon away from the conical balloon, a gripping component provided on the side wall of the vertical rod, and a sealing component provided on the periphery of the second catheter.

[0006] Preferably, the sealing assembly includes a sealing cylinder, a plug rod, a sealing ring, an inner ring, and a fixing member. The sealing cylinder is slidably connected to the periphery of the second conduit. An inner ring is fixedly connected to the inner wall of one end of the sealing cylinder. A plug rod is fixedly connected to the side wall of the inner ring. A fixing member is provided between the plug rod and the vertical rod. A sealing ring is fixedly connected to the other end of the sealing cylinder.

[0007] Preferably, the fixing component includes a limiting block, a fixing screw, a through hole, a fixing plate, and a fixing hole. A through hole is provided on the vertical rod at the position corresponding to the insertion rod. A fixing screw is threaded to the top of the vertical rod. A fixing plate is fixedly connected to one end of the fixing screw. Fixing holes are provided on the vertical rod and the insertion rod at the position corresponding to the fixing plate. Limiting blocks are fixedly connected to both ends of the side wall of the insertion rod on one side of the vertical rod.

[0008] Preferably, an external connecting ring is fixedly connected to the outer wall of the second catheter on the side of the conical balloon away from the inflatable balloon.

[0009] Preferably, the gripping component includes a square frame, a connecting block, and finger slots. The connecting block is fixedly connected to the side wall of the vertical rod, and the square frame is fixedly connected to one end of the connecting block. Several finger slots are provided on the side wall of the square frame.

[0010] Preferably, the grip assembly further includes a protective pad and an arc-shaped soft pad, with the protective pad fixedly connected to the inner sidewall of the square frame and the arc-shaped soft pad fixedly connected to the inner sidewall of the finger groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model features a sealing assembly. A connecting rod drives the sealing cylinder to move, which in turn moves the sealing ring and the inner ring. Once the sealing ring and the inner ring have moved and are in contact with the sidewalls of the inflatable balloon and the outer ring, the fixing screw is rotated. This rotation of the fixing screw causes the fixing disc to be inserted into the connecting rod. Under the action of the sealing cylinder, sealing ring, and inner ring, the conical balloon can be sealed and protected, preventing the drug coating on the surface of the conical balloon from dissolving into the bloodstream during subsequent insertion into the patient's blood vessels. This ensures the therapeutic effect of the drug coating on the surface of the conical balloon at the patient's lesion site.

[0013] 2. This utility model is equipped with a gripping component. Medical staff place their fingers inside the finger groove and grip the square frame. The curved soft pad prevents friction between the medical staff's fingers and the finger groove. At the same time, the protective pad prevents friction between the back of the medical staff's hand and the square frame, thus preventing hand injuries and ensuring the stability of the medical staff's grip on the square frame. This makes it easier for the medical staff to apply force to move the entire device and ensures the stability of the entire device during use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the sealing cylinder of this utility model;

[0016] Figure 3 This utility model Figure 1 Enlarged view of point A in the middle;

[0017] Figure 4 This is a partial sectional view of the connection state between the vertical rod and the plug rod of this utility model;

[0018] Figure 5 This utility model Figure 4 Enlarged view of point B in the middle;

[0019] Figure 6 This is a schematic diagram of the square frame structure of this utility model.

[0020] In the diagram: 1. First conduit; 2. Inflatable balloon; 3. Conical balloon; 4. Sealing assembly; 41. Sealing cylinder; 42. Insert rod; 43. Sealing ring; 44. Outer ring; 45. Inner ring; 46. Fixing component; 461. Limiting block; 462. Fixing screw; 463. Perforation; 464. Fixing disc; 465. Fixing hole; 5. Miniature air pump; 6. Second conduit; 7. Grip assembly; 71. Square frame; 72. Connecting block; 73. Protective pad; 74. Finger groove; 75. Arc-shaped soft pad; 8. Vertical rod; 9. Exhaust mechanism. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] Please see Figure 1-6 The present invention provides the following technical solution: a drug-coated balloon catheter, including a second catheter 6, a micro air pump 5 fixedly connected to one end of the second catheter 6, a vertical rod 8 fixedly connected to the side wall of the second catheter 6, an exhaust mechanism 9 provided on the side wall of the second catheter 6 and located on one side of the vertical rod 8, a conical balloon 3 fixedly connected to the outer side wall of the second catheter 6, an inflatable balloon 2 fixedly connected to the periphery of the other end of the second catheter 6, a first catheter 1 fixedly connected to the end of the inflatable balloon 2 away from the conical balloon 3, a gripping component 7 provided on the side wall of the vertical rod 8, and a sealing component 4 provided on the periphery of the second catheter 6.

[0024] Specifically, the sealing assembly 4 includes a sealing cylinder 41, a plug rod 42, a sealing ring 43, an inner ring 45, and a fixing member 46. The sealing cylinder 41 is slidably connected to the periphery of the second conduit 6. The inner ring 45 is fixedly connected to the inner wall of one end of the sealing cylinder 41. The plug rod 42 is fixedly connected to the side wall of the inner ring 45. A fixing member 46 is provided between the plug rod 42 and the vertical rod 8. The sealing ring 43 is fixedly connected to the other end of the sealing cylinder 41.

[0025] By adopting the above technical solution, after the inflatable balloon 2 is inflated using the micro air pump 5 and the second catheter 6, the sealing cylinder 41 is moved by the insertion rod 42. The movement of the sealing cylinder 41 moves the inner ring 45 and the sealing ring 43. When the sealing ring 43 moves and fits against the side wall of the inflatable balloon 2, the insertion rod 42 is fixed by the fixing member 46, thereby limiting and fixing the sealing cylinder 41. Under the action of the sealing cylinder 41, the sealing ring 43 and the inner ring 45, the conical balloon 3 can be sealed and protected, preventing the drug coating on the surface of the conical balloon 3 from being absorbed into the blood during the subsequent insertion of the conical balloon 3 into the patient's blood vessel, thus ensuring the therapeutic effect of the drug coating on the surface of the conical balloon 3 on the patient's lesion site.

[0026] Specifically, the fastener 46 includes a limiting block 461, a fixing screw 462, a through hole 463, a fixing plate 464, and a fixing hole 465. A through hole 463 is provided on the vertical rod 8 at the position corresponding to the insertion rod 42. The fixing screw 462 is threadedly connected to the upper part of the vertical rod 8. One end of the fixing screw 462 is fixedly connected to the fixing plate 464. Fixing holes 465 are provided on the vertical rod 8 and the insertion rod 42 at the positions corresponding to the fixing plate 464. Limiting blocks 461 are fixedly connected to both ends of the side wall of the insertion rod 42 on one side of the vertical rod 8.

[0027] By adopting the above technical solution, the insertion rod 42 is moved along the perforation 463. When the insertion rod 42 moves, it drives the sealing cylinder 41 to move. The movement of the sealing cylinder 41 drives the sealing ring 43 to move and fit against the side wall of the inflatable balloon 2. Then, the fixing screw 462 is rotated to rotate and move along the vertical rod 8. The rotation and movement of the fixing screw 462 drives the fixing plate 464 to rotate and move and insert into the fixing hole 465. By using the cooperation of the fixing plate 464 and the fixing hole 465, the insertion rod 42 can be inserted and fixed, thereby limiting and fixing the sealing cylinder 41 to ensure the stability of the placement of the sealing cylinder 41.

[0028] Specifically, an external ring 44 is fixedly connected to the outer wall of the second catheter 6 on the side of the cone-shaped balloon 3 away from the inflatable balloon 2.

[0029] By adopting the above technical solution, after the sealing cylinder 41 moves and drives the sealing ring 43 to move and fit against the side wall of the inflatable balloon 2, the inner ring 45 then fits against the side wall of the outer ring 44. With the cooperation of the inner ring 45 and the outer ring 44, gaps between the sealing cylinder 41 and the second conduit 6 can be avoided, ensuring the sealing effect of the sealing cylinder 41.

[0030] In this embodiment, when treatment is needed at the patient's lesion site, medical staff inflate the balloon 2 using the miniature air pump 5 and the second conduit 6. Then, the insertion rod 42 is moved along the perforation 463. The movement of the insertion rod 42 moves the sealing cylinder 41, which in turn moves the sealing ring 43 and the inner ring 45. Once the sealing ring 43 and the inner ring 45 have moved and are in contact with the sidewalls of the balloon 2 and the outer ring 44 respectively, the fixing screw 462 is rotated to move along the vertical rod 8. The rotating and moving screw 462 causes the rotating and moving fixed plate 464 to rotate and move, inserting it into the fixed hole 465 on the insertion rod 42. The cooperation between the fixed plate 464 and the fixed hole 465 allows for the insertion and fixing of the insertion rod 42, thereby limiting and fixing the sealing cylinder 41 and ensuring its stability. Under the action of the sealing cylinder 41, sealing ring 43, and inner ring 45, the conical balloon 3 can be sealed and protected, preventing subsequent insertion of the conical balloon 3. During the process of reaching the patient's blood vessel, the drug coating on the surface of the conical balloon 3 is absorbed into the blood, ensuring the therapeutic effect of the drug coating on the lesion site. The medical staff then place the inflatable balloon 2 in the blood vessel through the first catheter 1, while simultaneously delivering the conical balloon 3 to the lesion site. Then, the fixing screw 462 is rotated, causing it to rotate and move along the vertical rod 8. The rotation of the fixing screw 462 causes the fixing plate 464 to rotate and move into the fixing hole 465 on the vertical rod 8. Then, the insertion rod 42 moves along the perforation 463. The movement of the insertion rod 42 causes the sealing cylinder 41 to move. The movement of the sealing cylinder 41 causes the sealing ring 43 and the inner ring 45 to move. When the sealing ring 43 and the inner ring 45 move away from the inflatable balloon 2 and the outer ring 44 respectively, the gas inside the inflatable balloon 2 is discharged using the exhaust mechanism 9. The sidewall of the patient's blood vessel then adheres to the conical balloon 3, so that the drug coating on the surface of the conical balloon 3 comes into contact with the lesion site, and the drug is used to treat the lesion site.

[0031] Example 2

[0032] The difference between this embodiment and embodiment 1 is that the grip component 7 includes a square frame 71, a connecting block 72, and finger grooves 74. The connecting block 72 is fixedly connected to the side wall of the vertical rod 8, and the square frame 71 is fixedly connected to one end of the connecting block 72. Several finger grooves 74 are provided on the side wall of the square frame 71.

[0033] Specifically, the grip assembly 7 also includes a protective pad 73 and an arc-shaped soft pad 75. The protective pad 73 is fixedly connected to the inner wall of the square frame 71, and the arc-shaped soft pad 75 is fixedly connected to the inner wall of the finger groove 74.

[0034] By adopting the above technical solution, medical staff place their fingers inside the finger groove 74 and grip the square frame 71. The curved soft pad 75 prevents friction between the medical staff's fingers and the finger groove 74. At the same time, the protective pad 73 prevents friction between the back of the medical staff's hand and the square frame 71, thereby preventing hand injuries and ensuring the stability of the medical staff's grip on the square frame 71.

[0035] In this embodiment, when medical personnel use the device, they place their fingers inside the finger groove 74 and grip the square frame 71. The curved soft pad 75 prevents friction between the medical personnel's fingers and the finger groove 74. At the same time, the protective pad 73 prevents friction between the back of the medical personnel's hand and the square frame 71, thus preventing hand injuries and ensuring the stability of the medical personnel's grip on the square frame 71. This facilitates the medical personnel's application of force to move the entire device and ensures the stability of the entire device during use.

[0036] The structure and principle of the exhaust mechanism 9, which consists of an exhaust pipe and an exhaust valve, in this utility model have been disclosed in a tapered drug-coated balloon catheter disclosed in Chinese patent application number 202123370028.9. Its working principle is as follows: an exhaust pipe is fixedly connected to the side wall of the second conduit 6, and an exhaust valve is installed on the exhaust pipe. When it is necessary to discharge the gas inside the inflatable balloon 2, the exhaust valve is opened, and the gas inside the inflatable balloon 2 is discharged through the second conduit 6 and the exhaust pipe.

[0037] The working principle and usage process of this utility model are as follows: When the patient's lesion needs to be treated, medical staff inflate the balloon 2 using a miniature air pump 5 and a second conduit 6. Then, the insertion rod 42 is moved along the perforation 463. The movement of the insertion rod 42 moves the sealing cylinder 41, which in turn moves the sealing ring 43 and the inner ring 45. After the sealing ring 43 and the inner ring 45 move and fit against the side walls of the balloon 2 and the outer ring 44 respectively, the fixing screw 462 is rotated, causing it to rotate along the vertical rod 8. The rotation of the fixing screw 462 causes the fixing plate 464 to rotate and insert into the insertion device. Inside the fixing hole 465 on the rod 42, the fixing plate 464 and the fixing hole 465 cooperate to insert and fix the insertion rod 42, thereby limiting and fixing the sealing cylinder 41 to ensure the stability of the sealing cylinder 41. Under the action of the sealing cylinder 41, the sealing ring 43 and the inner ring 45, the cone balloon 3 can be sealed and protected to prevent the drug coating on the surface of the cone balloon 3 from being absorbed into the blood during the subsequent insertion of the cone balloon 3 into the patient's blood vessel, thus ensuring the therapeutic effect of the drug coating on the surface of the cone balloon 3 on the patient's lesion site. Medical staff place their fingers into the finger groove 74. The staff then grips the square frame 71. The curved soft pad 75 prevents friction between the staff's fingers and the finger groove 74, while the protective pad 73 prevents friction between the staff's hand and the square frame 71, thus preventing hand injury and ensuring stability in the staff's grip. This facilitates the staff's application of force to move the entire device, ensuring stability during use. The staff then applies force to place the inflatable balloon 2 into the blood vessel through the first catheter 1, simultaneously delivering the cone-shaped balloon 3 to the lesion site. Finally, the fixing screw 462 is rotated. The device rotates and moves along the vertical rod 8. The rotating and moving fixed screw 462 drives the fixed plate 464 to rotate and move into the fixed hole 465 on the vertical rod 8. Then, the insertion rod 42 moves along the perforation 463. The movement of the insertion rod 42 drives the sealing cylinder 41 to move. The movement of the sealing cylinder 41 drives the sealing ring 43 and the inner ring 45 to move. When the sealing ring 43 and the inner ring 45 move away from the inflatable balloon 2 and the outer ring 44 respectively, the gas inside the inflatable balloon 2 is discharged by the exhaust mechanism 9. The patient's blood vessel sidewall then adheres to the conical balloon 3, so that the drug coating on the surface of the conical balloon 3 comes into contact with the lesion site, and drug treatment is performed on the lesion site.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drug-coated balloon catheter, comprising a second catheter (6), one end of which is fixedly connected to a miniature air pump (5), a vertical rod (8) fixedly connected to the side wall of the second catheter (6), an exhaust mechanism (9) provided on the side wall of the second catheter (6) and on one side of the vertical rod (8), a conical balloon (3) fixedly connected to the outer side wall of the second catheter (6), an inflatable balloon (2) fixedly connected to the periphery of the other end of the second catheter (6), and a first catheter (1) fixedly connected to the end of the inflatable balloon (2) away from the conical balloon (3), characterized in that: A gripping assembly (7) is provided on the side wall of the vertical rod (8), and a sealing assembly (4) is provided on the periphery of the second conduit (6).

2. The drug-coated balloon catheter according to claim 1, characterized in that: The sealing assembly (4) includes a sealing cylinder (41), a plug rod (42), a sealing ring (43), an inner ring (45), and a fixing member (46). The sealing cylinder (41) is slidably connected to the periphery of the second conduit (6). An inner ring (45) is fixedly connected to the inner wall of one end of the sealing cylinder (41). A plug rod (42) is fixedly connected to the side wall of the inner ring (45). A fixing member (46) is provided between the plug rod (42) and the vertical rod (8). A sealing ring (43) is fixedly connected to the other end of the sealing cylinder (41).

3. The drug-coated balloon catheter according to claim 2, characterized in that: The fastener (46) includes a limiting block (461), a fixing screw (462), a through hole (463), a fixing plate (464), and a fixing hole (465). A through hole (463) is provided on the vertical rod (8) at the position corresponding to the plug-in rod (42). A fixing screw (462) is threadedly connected to the upper part of the vertical rod (8). A fixing plate (464) is fixedly connected to one end of the fixing screw (462). A fixing hole (465) is provided on the vertical rod (8) and the plug-in rod (42) at the position corresponding to the fixing plate (464). A limiting block (461) is fixedly connected to both ends of the side wall of the plug-in rod (42) on one side of the vertical rod (8).

4. The drug-coated balloon catheter according to claim 1, characterized in that: An external ring (44) is fixedly connected to the outer wall of the second catheter (6) on the side of the conical balloon (3) away from the inflatable balloon (2).

5. The drug-coated balloon catheter according to claim 1, characterized in that: The grip assembly (7) includes a square frame (71), a connecting block (72) and finger slots (74). The connecting block (72) is fixedly connected to the side wall of the vertical rod (8). The square frame (71) is fixedly connected to one end of the connecting block (72). Several finger slots (74) are provided on the side wall of the square frame (71).

6. The drug-coated balloon catheter according to claim 5, characterized in that: The grip assembly (7) also includes a protective pad (73) and an arc-shaped soft pad (75). The protective pad (73) is fixedly connected to the inner wall of the square frame (71), and the arc-shaped soft pad (75) is fixedly connected to the inner wall of the finger groove (74).

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