Improved super-long shock wave balloon catheter

Abstract

An improved super-long shock wave balloon catheter comprises a catheter body, a balloon which is arranged at the far end of the catheter body and can be filled and a shock wave generator assembly which is arranged on the catheter body and located in a balloon cavity, a balloon tip is arranged at the far end of the catheter body, the far end of the balloon is connected with the balloon tip in a sealed mode, an ultrasonic transducer is arranged at the far end of the balloon tip, and the ultrasonic transducer is connected with the shock wave generator assembly in a sealed mode. The shock wave generator assembly comprises at least three shock wave generators, a pulse generator and an image display device are arranged at the near end of the catheter, the image display device is electrically connected with the ultrasonic transducer through a wire, the pulse generator is electrically connected with the shock wave generator assembly through a wire, and the shock wave generators are controlled to work simultaneously or independently through the pulse generator.

Description

Technical Field

[0001] This utility model relates to a medical device, and more particularly to an improved ultra-long shockwave balloon catheter. Background Technology

[0002] In the field of peripheral vascular surgery, existing shockwave balloon catheters are all less than 60mm in length. Many long intravascular calcified lesions cannot be treated with a single shockwave catheter, which means that multiple shockwave catheters are used to treat long intravascular calcified lesions. This results in some intravascular treatment sites being repeatedly subjected to shockwaves and being blocked, which may lead to the risk of vascular spasm at the lesion site and ischemia in distal vessels. In the current technology, after breaking up the intravascular calcified lesion, it is not possible to confirm the fragmentation status or the location of the calcified lesion in time. This requires ultrasound examination of the intravascular vessel before or after fragmentation to check or confirm the location of the calcified lesion, which undoubtedly prolongs the operation time.

[0003] In current endovascular interventional procedures, the IVUS intravascular ultrasound and interventional surgery need to be performed separately, which makes the procedure relatively complex and time-consuming. On the one hand, it increases the time the patient spends on the operating table, and the exchange of the IVUS guidewire and the catheter-guided guidewire also brings greater risks; on the other hand, it also increases the cost of the procedure. Utility Model Content

[0004] The purpose of this invention is to provide an improved ultra-long shockwave balloon catheter, and the technical problem to be solved is to improve the treatment effect.

[0005] To solve the above problems, this utility model adopts the following technical solution: an improved ultra-long shockwave balloon catheter, including a catheter, an inflatable balloon disposed at the distal end of the catheter, and a shockwave generator assembly disposed in the balloon cavity. The distal end of the catheter is provided with a balloon tip, the distal end of the balloon is sealed to the balloon tip, and the distal end of the balloon tip is provided with an ultrasonic transducer. The shockwave generator assembly includes at least three shockwave generators. A pulse generator and an image display device are provided at the proximal end of the catheter. The image display device is electrically connected to the ultrasonic transducer via a wire, and the pulse generator is electrically connected to the shockwave generator assembly via a wire, so as to control the shockwave generators to work simultaneously or individually via the pulse generator.

[0006] Furthermore, the tip of the balloon is fitted and fixed to the distal end of the catheter.

[0007] Furthermore, the ultrasonic transducer is located at the distal end of the balloon tip.

[0008] Furthermore, the shock wave generator assembly includes four to ten shock wave generators, which are arranged at equal intervals.

[0009] Furthermore, the shock wave generator includes at least two electrodes, which are fixed at the location of the catheter in the balloon.

[0010] Furthermore, the electrode is a ring electrode or a sheet electrode.

[0011] Furthermore, the two electrodes are spaced apart.

[0012] Compared with the prior art, this invention, by setting multiple shock wave generators and an ultrasonic transducer at the distal end of the catheter, can confirm the location of calcified lesions or the extent of fragmentation before or after the shock wave generators operate. The multiple shock wave generators can operate and discharge simultaneously or separately, enabling discharge at specific locations on the balloon based on the results detected by the ultrasonic transducer, thereby achieving precise treatment, improving treatment efficacy, and reducing damage to blood vessels. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0014] Figure 2 This is a schematic diagram of the pulse power supply of Embodiment 1 of this utility model.

[0015] Figure 3 This is a structural schematic diagram of Embodiment 2 of this utility model.

[0016] Figure 4 This is a schematic diagram of the pulse power supply of Embodiment 2 of this utility model.

[0017] Figure 5 This is a structural schematic diagram of Embodiment 3 of this utility model.

[0018] Figure 6 This is a schematic diagram of the pulse power supply of Embodiment 3 of this utility model.

[0019] Figure 7 This is a schematic diagram of the present invention being inserted into a blood vessel.

[0020] Figure 8 yes Figure 7 Sectional view of AA.

[0021] Figure 9 yes Figure 7 A cross-sectional view of BB.

[0022] Figure 10 This is a schematic diagram of applying corona discharge to calcified lesions. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0024] In this invention, the distal end refers to the end furthest from the surgeon; the proximal end refers to the end closest to the surgeon.

[0025] Example 1

[0026] like Figure 1 and Figure 2 As shown, this utility model discloses an improved ultra-long shockwave balloon catheter, including a catheter 1, an inflatable balloon 2 disposed at the distal end of the catheter 1, and a shockwave generator assembly 3 disposed within the cavity of the balloon 2. The balloon 2 is arranged around the circumference of the catheter 1, and the proximal and distal ends of the balloon 2 are sealed to the catheter 1. The connection structure between the balloon 2 and the catheter 1 adopts the connection method of the balloon and catheter in the prior art of shockwave balloon catheters. Generally, the catheter 1 is a double-layer tube, with the inner tube 21 extending to the distal end of the outer tube 22 and sealed to the distal end of the balloon. The proximal end of the balloon is sealed to the distal end of the outer tube 11, allowing the electrolyte solution to be filled into the balloon. This part of the structure will not be described in detail here. A balloon tip 4 is fitted onto the distal end of the inner tube 12, and the balloon tip 4 is fixed to the distal end of the catheter 1. The distal end of the balloon 2 and the... The balloon tips 4 are sealed together. An ultrasound transducer 5 is provided at the distal end of the balloon tip 4. The ultrasound transducer 5 is fixed on the balloon tip 4. The ultrasound transducer 5 is existing technology and will not be described in detail here. The ultrasound transducer 5 is used for intravascular ultrasound. In this embodiment, the shock wave generator assembly 3 includes four shock wave generators 31. The four shock wave generators 31 are arranged at equal intervals. The specific structure of the shock wave generator 31 and the connection method of the wires are no different from the structure shown in the shock wave generator or corona generator in the prior art, and will not be described again here. A pulse generator 6 and an image display device 7 are provided at the proximal end of the catheter 1. The image display device 7 is electrically connected to the ultrasound transducer 5 through wires. The pulse generator 6 is electrically connected to the shock wave generator assembly 3 through wires. The pulse generator 6 controls the shock wave generators 31 to work simultaneously or individually.

[0027] In this embodiment, the shock wave generator 31 includes two electrodes 32. The electrodes 32 are fixed in the inner tube 12 at the position of the balloon 2. The electrodes 32 are ring electrodes with discharge through holes. The two electrodes 32 are arranged at intervals to realize arc discharge or corona discharge. In this embodiment, the shock wave generator 31 is a corona generator. The two electrodes 32 are connected in series, while the shock wave generators 31 are connected in parallel.

[0028] The wires of the ultrasonic transducer 5 and the shock wave generator 31 extend along the wall of the inner tube 12 and protrude from the proximal interface of the handle 8 at the proximal end of the conduit 1.

[0029] like Figure 2 It can be seen that the shock wave generator 31 here is the pulse generator 6 circuit corresponding to the corona generator of corona discharge.

[0030] Includes: diode D;

[0031] The capacitor C is electrically connected to the diode D;

[0032] An insulated-gate bipolar transistor G electrically connected to diode D and capacitor C;

[0033] The first resistor R1 is electrically connected to the insulated-gate bipolar transistor G;

[0034] The second resistor R2 is electrically connected to the first resistor R1;

[0035] Relay group K is electrically connected to an insulated gate bipolar transistor G and a first resistor R1.

[0036] The pulse generator 6 can set the voltage value (1000-8000V) and the pulse width value (1-200us) of the discharge charge in the circuit and can be connected to at least one pair of electrodes. The power pulse generator 6 uses a built-in battery to store high-voltage charge in a capacitor through the boosting of the high-voltage module. Diode D has a rectifying function; after the current flows through diode D, the negative voltage is filtered out, forming a unidirectional pulse current. The unidirectional pulse current flows through capacitor C, charging capacitor C and storing high-voltage charge. The first resistor R1 and the second resistor R2 are the working loads at both ends of relay group K, protecting the circuit safety. When high-voltage charge needs to be released to the electrode, the circuit is opened and closed through the cooperation of IGBT (Insulated Gate Bipolar Transistor) and relay group K. When one of the switches in relay group K is closed, the IGBT conducts, releasing the high-voltage charge stored in capacitor C through the connecting circuit, forming a high-voltage pulse. Here, relay group K has four channels, which are electrically connected to the electrodes 32 of the four shock wave generators 31 respectively. When multiple pairs of electrodes need to generate arcs simultaneously or sequentially, multiple energy storage capacitors and multiple relays are used to manage the circuit opening and closing. The current threshold feedback in the circuit can be set and combined with the power supply delay function to realize the pulse width of high-voltage charge release.

[0037] When in use, this invention is inserted into a blood vessel ( Figure 7 As shown), ultrasound transducers are used to probe the inner wall of blood vessels, generating corresponding image signals which are then displayed on an image display device. This allows doctors to understand the specific details of the calcified lesions and their exact location within the blood vessel wall (e.g., [image of calcification]). Figure 8 or Figure 9 As shown), once the specific location and condition of the calcified lesion are found, the shock wave generator 31 at the corresponding location is triggered based on the location of the calcified lesion H. Figure 10As shown in the figure, the calcified lesion H is broken up. Finally, the effect of the treatment can be judged in real time by the detection results of the ultrasound transducer. There is no need to replace the corresponding vascular ultrasound catheter, which saves surgical time, realizes precise treatment, improves the treatment effect and reduces damage to blood vessels.

[0038] Example 2

[0039] like Figure 3 and Figure 4 As shown, the difference between Embodiment 2 and Embodiment 1 is that five shock wave generators 31 are provided, which are also connected in parallel. The rest will not be described in detail here. The circuit part can be referred to the description in Embodiment 1.

[0040] Example 3

[0041] like Figure 5 and Figure 6 As shown, the difference between Embodiment 3 and Embodiment 1 is that the shock wave generator 31 is provided with ten units, which are also connected in parallel. The rest will not be described in detail here. The circuit part can be referred to the description in Embodiment 1.

[0042] Beneficial effects:

[0043] First, the device offers precise positioning. During interventional surgery, the ultrasound transducer clearly displays the internal structure of the blood vessel, accurately locating the lesion. The shockwave generator, based on the precise location information provided by ultrasound, acts directly on the lesion site. Furthermore, because the balloon's working area ranges from 20-300mm, it can precisely break up calcifications in specific locations, thereby improving treatment accuracy.

[0044] Secondly, it can improve treatment efficiency, significantly reduce the overall surgery time, and reduce patient suffering. This combined approach can also optimize treatment outcomes. By using ultrasound imaging to monitor the working status of the shockwave catheter and changes in the lesion site in real time, doctors can adjust treatment parameters promptly based on feedback, which can improve the flexibility of the treatment process and is expected to improve the treatment quality for diseases such as vascular lesions.

Claims

1. An improved ultra-long shockwave balloon catheter, comprising a catheter (1), an inflatable balloon (2) disposed at the distal end of the catheter (1), and a shockwave generator assembly (3) disposed within the cavity of the balloon (2), characterized in that: The distal end of the catheter (1) is provided with a balloon tip (4), the distal end of the balloon (2) is sealed to the balloon tip (4), the distal end of the balloon tip (4) is provided with an ultrasonic transducer (5), the shock wave generator assembly (3) includes at least three shock wave generators (31), a pulse generator (6) and an image display device (7) are provided at the proximal end of the catheter (1), the image display device (7) is electrically connected to the ultrasonic transducer (5) via a wire, and the pulse generator (6) is electrically connected to the shock wave generator assembly (3) via a wire, so as to control the shock wave generators (31) to work simultaneously or individually via the pulse generator (6).

2. The improved ultra-long shockwave balloon catheter according to claim 1, characterized in that: The tip (4) of the balloon is fitted and fixed to the distal end of the catheter (1).

3. The improved ultra-long shockwave balloon catheter according to claim 2, characterized in that: The ultrasonic transducer (5) is located at the distal end of the balloon tip (4).

4. The improved ultra-long shockwave balloon catheter according to claim 1, characterized in that: The shock wave generator assembly (3) includes four to ten shock wave generators (31), which are arranged at equal intervals.

5. The improved ultra-long shockwave balloon catheter according to claim 1 or 4, characterized in that: The shock wave generator (31) includes at least two electrodes (32), which are fixed at the location of the catheter (1) in the balloon (2).

6. The improved ultra-long shockwave balloon catheter according to claim 5, characterized in that: The electrode (32) is a ring electrode or a sheet electrode.

7. The improved ultra-long shockwave balloon catheter according to claim 6, characterized in that: The two electrodes (32) are spaced apart.

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