Electromagnetic pulse type shock wave balloon and vascular interventional therapy instrument

Abstract

The invention belongs to the technical field of medical instruments, and particularly discloses an electromagnetic pulse type shock wave balloon and a vascular interventional therapy instrument.The electromagnetic pulse type shock wave balloon comprises a medical balloon body and a medical catheter, a miniature disc-shaped coil is arranged in the medical balloon body, a conductive wire is arranged in the medical catheter, the conductive wire is connected with the miniature disc-shaped coil, and the miniature disc-shaped coil is connected with the medical catheter. A metal patch is arranged on the inner wall or the outer wall of the medical balloon and corresponds to the micro disc-shaped coil; the micro disc-shaped coil is communicated with an external power supply through a conductive wire, the external power supply provides pulse current to flow through the micro disc-shaped coil to excite an alternating magnetic field, the metal patch generates eddy current in the magnetic field, the eddy current generates repulsive force in the magnetic field to push the metal patch to move, and the metal patch drives the wall surface of the balloon to expand and contract to form shock wave to radiate outwards. The invention provides an electromagnetic pulse type shock wave balloon which is a novel shock wave balloon which is convenient to manufacture, low in cost, longer in service life and stable in shock wave energy and is used for vascular calcification treatment.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices and relates to an electromagnetic pulse shock wave balloon and a vascular interventional treatment device. Background Art

[0002] Vascular calcification refers to a disease in which calcium deposits on the blood vessel wall, which causes the blood vessel wall to harden and reduce compliance, and is prone to cause diseases with high mortality and disability rates, such as myocardial ischemia, left ventricular hypertrophy, heart failure, thrombosis, and plaque rupture. Vascular calcification often runs through various complex vascular lesions, and calcified lesions are often accompanied by angulation and torsion of the blood vessels. At the same time, the calcified lesions have a poor response to vasodilation.

[0003] Traditional methods for treating vascular calcification lesions mainly include: non-compliant balloon, cutting balloon, scoring balloon, plaque atherectomy, and excimer laser. These methods are usually only applicable to mild and moderate calcified lesions, and can only treat shallow calcification, but are powerless against severe and deep calcification. There is even a risk of causing complications such as coronary artery dissection, coronary artery perforation, bradycardia and atrioventricular block, coronary artery spasm, slow blood flow / no reflow, and distal embolism. It can be seen that there are still major pain points in the clinic for vascular calcification, and there are many unmet needs.

[0004] Shock wave balloon is a new technology for treating vascular calcification in recent years. Usually, shock wave balloon generates shock waves by performing spark discharge (liquid phase pulse discharge) inside the balloon, and uses the shock waves to break up the calcified layer of blood vessels. However, there are some shortcomings in the actual application of spark discharge shock wave balloons, mainly including: the discharge electrode structure of existing intravascular shock wave technology is complex, expensive, and difficult to manufacture; at the same time, due to the limitations of spark discharge principle and material properties, the service life of the common shock wave balloon heavy electrodes on the market is short, and the electrodes are often completely ablated after only a few dozen uses; in addition, due to the limitations of the spark discharge principle and the liquid phase environment inside the balloon, the intravascular shock wave based on the liquid phase pulse discharge principle has unstable discharge, that is, the shock wave energy is unstable. Summary of the invention

[0005] In view of this, the present invention provides an electromagnetic pulse shock wave balloon, which is a new type of shock wave balloon that is easy to manufacture, low in cost, has a longer service life, and has stable shock wave energy, for use in the treatment of vascular calcification.

[0006] In order to solve the above problems, an embodiment of the present invention provides an electromagnetic pulse shock wave balloon, which is special in that:

[0007] It comprises a medical balloon and a medical catheter, wherein the medical catheter passes through the medical balloon, a micro disc coil is arranged in the medical balloon, a conductive wire is arranged in the medical catheter, the conductive wire is connected to the micro disc coil, and a metal patch is arranged on the inner wall or outer wall of the medical balloon at a position corresponding to the micro disc coil;

[0008] The micro-disk coil is connected to an external power supply through a conductive wire. The external power supply inputs a pulse current into the micro-disk coil. The pulse current flows through the micro-disk coil, exciting an alternating magnetic field around the micro-disk coil. The metal patch generates eddy currents in the magnetic field. The eddy currents generate repulsive forces in the magnetic field, pushing the metal patch to move. The metal patch drives the balloon wall to expand and contract, forming a shock wave that radiates outward.

[0009] Furthermore, the medical balloon may adopt an existing pressure balloon used for interventional treatment of vascular diseases. The balloon material needs to have good insulation properties, the balloon can withstand at least 4 atm pressure, and the bursting pressure is not less than 10 atm.

[0010] Furthermore, the micro disc coil is a flat disc-shaped coil wound by a wire or manufactured by printing and photolithography technology. The micro disc coil is contained in the balloon and connected to a special power supply through a conductive wire. The micro disc coil is powered by the special power supply to generate an alternating magnetic field.

[0011] Furthermore, the metal patch is a metal sheet with good electrical conductivity, and the metal sheet is attached to the inner wall or outer wall of the balloon.

[0012] Furthermore, when the metal patch is attached to the outer wall of the balloon, an insulating coating needs to be applied. The metal patch generates an induced current under the action of the electromagnetic coil, also known as eddy current. The eddy current generates a repulsive force in the magnetic field, which drives the metal patch to move, and then drives the balloon wall to move, forming a shock wave that radiates to the blood vessel wall.

[0013] Furthermore, the conductive wire is a metal wire with good conductivity and is wrapped in an insulating sheath with good insulation properties. The conductive wire connects the micro disc coil to an external power source.

[0014] Furthermore, a first through hole is provided at the axis of the medical catheter, a guide wire is provided in the first through hole, and movement of the shock wave balloon in the blood vessel is controlled by the guide wire.

[0015] Furthermore, small holes are arranged around the first through hole of the medical catheter, and the conductive wires are placed in the small holes.

[0016] Furthermore, one or more of the micro disc coils can be installed according to demand, and the number of metal patches is the same as the number of micro disc coils.

[0017] On the other hand, the present invention also proposes a vascular interventional treatment device, which is special in that it includes a special power supply and the above-mentioned electromagnetic pulse shock wave balloon, the special power supply is connected to the conductive wire of the electromagnetic pulse shock wave balloon, the special power supply inputs a pulse current to the micro-disk coil through the conductive wire, the pulse current flows through the micro-disk coil, and an alternating magnetic field is excited around the micro-disk coil, the metal patch generates eddy currents in the magnetic field, the eddy currents generate repulsive force in the magnetic field, pushing the metal patch to move, the metal patch drives the balloon wall to expand and contract, forming a shock wave that radiates outward.

[0018] Compared with the prior art, the electromagnetic pulse shock wave balloon and vascular interventional treatment device proposed in the present invention have at least the following beneficial effects:

[0019] (1) The electromagnetic pulse shock wave balloon and vascular interventional treatment device proposed in the present invention are completely different from the common shock wave balloon based on the principle of liquid pulse discharge (underwater spark discharge). They use the electromagnetic pulse principle to generate shock waves, and the parameters such as shock wave energy, frequency and amplitude are more stable.

[0020] (2) Electromagnetic pulses do not generate sparks when used as shock wave balloons, thus avoiding the disadvantage of electrode ablation in shock wave balloons based on the principle of liquid phase pulse discharge (underwater spark discharge). They are easy to manufacture, low cost, and have a longer service life.

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the vascular interventional treatment device proposed by the present invention;

[0024] Figure 2 This is a structural diagram of the first embodiment of the electromagnetic pulse shock wave balloon proposed by the present invention;

[0025] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0026] Figure 4 This is a structural diagram of a second embodiment of the electromagnetic pulse shock wave balloon proposed by the present invention;

[0027] Figure 5 This is a structural diagram of a third embodiment of the electromagnetic pulse shock wave balloon proposed by the present invention;

[0028] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0029] In the figure: 1. Special power supply; 2. Electromagnetic pulse shock wave balloon; 21. Medical balloon; 22. Micro disc coil; 23. Metal patch; 24. Conductive wire; 25. Medical catheter. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The present invention is intended to be more generally applied to socket-type heating pipes, so the present invention can be used in any practical application that is suitable for the specific application.

[0031] See also Figure 2-Figure 6 An embodiment of the present invention provides an electromagnetic pulse shock wave balloon, including a medical balloon 21 and a medical catheter 25, wherein the medical catheter 25 passes through the medical balloon 21, wherein a micro-disk coil 22 is disposed in the medical balloon 21, and wherein the micro-disk coil 22 is fixed on the outer surface of the medical catheter 25; wherein a conductive wire 24 is disposed in the medical catheter 25, and wherein the conductive wire 24 is connected to the micro-disk coil 22, and a metal patch 23 is disposed on the inner wall or outer wall of the medical balloon 21 at a position corresponding to the micro-disk coil 22.

[0032] The micro-disk coil 22 is connected to an external power supply through a conductive wire 24. The external power supply inputs a pulse current into the micro-disk coil 22. The pulse current flows through the micro-disk coil, exciting an alternating magnetic field around the micro-disk coil. The metal patch 23 generates an induced current in the magnetic field, also known as an eddy current. The eddy current generates a repulsive force in the magnetic field, pushing the metal patch 23 to move. The metal patch 23 drives the balloon wall to expand and contract, forming a shock wave that radiates outward. The shock wave can destroy calcified plaques in the blood vessels. When the calcified layer is broken by the shock wave, a lower pressure can cause the blood vessels to dilate.

[0033] Specifically, the medical balloon 21 can adopt the existing pressure balloon used for interventional treatment of vascular diseases. The balloon material needs to have good insulation properties. The medical balloon 21 is fixed on the medical catheter 25. The balloon can withstand at least 4atm pressure and the bursting pressure is not less than 10atm.

[0034] Specifically, see Figure 3The micro disc coil 22 is a flat disc-shaped coil that is wound by a wire or manufactured by printing and photolithography technology. The micro disc coil 22 is contained in the balloon and can be attached to the outer wall of the medical catheter 25. It is connected to an external power source through a conductive wire. The external power source provides a pulse power supply to the micro disc coil 22 to generate an alternating magnetic field.

[0035] Specifically, the metal patch 23 is a metal sheet with good electrical conductivity, and the metal sheet is attached to the inner wall or outer wall of the balloon. The position of each metal sheet corresponds to the micro disc coil 22.

[0036] Furthermore, when the metal patch 23 is attached to the outer wall of the balloon, an insulating coating needs to be applied. The metal patch 23 generates an induced current, also known as an eddy current, under the action of the electromagnetic coil. The eddy current generates a repulsive force in the magnetic field, which pushes the metal patch 23 to move, and then drives the balloon wall to move, forming a shock wave that radiates to the blood vessel wall.

[0037] As a preferred embodiment of the present invention, the conductive wire 24 is a metal wire with good conductivity and is wrapped in an insulating sheath with good insulation. The conductive wire 24 connects the micro disc coil 22 to an external power source.

[0038] As a preferred embodiment of the present invention, see Figure 3 The medical catheter 25 has a first through hole at its axis, a guide wire is disposed inside the first through hole, and the movement of the shock wave balloon in the blood vessel is controlled by the guide wire.

[0039] Further, see Figure 3 There are small holes distributed in a ring around the first through hole of the medical catheter 25, and the conductive wires 24 are placed in the small holes.

[0040] As a preferred embodiment of the present invention, see Figure 5 and Figure 6 The micro disc coil 22 can be installed one or more according to the needs, and the position can also be distributed according to the requirements. The number of metal patches 23 is the same as that of the micro disc coil 22, and the positions correspond to each other one by one.

[0041] On the other hand, see Figure 1 The present invention also proposes a vascular interventional treatment device, comprising a special power supply 1 and the above-mentioned electromagnetic pulse shock wave balloon 2, wherein the special power supply 1 is a pulse power supply that can be used to drive the shock wave balloon 2.

[0042] Specifically, the special power supply 1 includes a pulse energy storage capacitor and a switch component. The special power supply 1 can convert the mains electricity and store it in the pulse energy storage capacitor, and use the switching power supply technology to realize the flow of electricity stored in the capacitor into the shock wave balloon through the switch component, thereby driving the shock wave balloon to generate shock waves.

[0043] Specifically, the pulse energy storage capacitor of the special power supply 1 is connected to the conductive wire 24 of the electromagnetic pulse shock wave balloon through a switching component. The special power supply 1 converts the mains electricity and stores it on the pulse energy storage capacitor. The switching component is used to realize that the electricity stored on the capacitor flows into the conductive wire 24, and a pulse current is input to the micro-disk coil 22. The pulse current flows through the micro-disk coil 22, and an alternating magnetic field is excited around the micro-disk coil 22. The metal patch 23 generates eddy currents in the magnetic field, and the eddy currents generate repulsive forces in the magnetic field, which push the metal patch 23 to move. The metal patch 23 drives the balloon wall to expand and contract, forming a shock wave that radiates outward. The released shock wave destroys the calcified plaques in the blood vessels. When the calcified layer is broken by the shock wave, the blood vessels can be dilated at a lower pressure. At this time, the stent can be safely implanted in the blood vessels to improve blood flow, and the electromagnetic pulse shock wave will hardly cause damage to normal vascular tissue.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An electromagnetic pulse shock wave balloon, characterized in that: The medical balloon (21) comprises a medical balloon (21) and a medical catheter (25), wherein the medical catheter (25) passes through the medical balloon (21), a micro-disk coil (22) is arranged in the medical balloon (21), a conductive wire (24) is arranged in the medical catheter (25), the conductive wire (24) is connected to the micro-disk coil (22), and a metal patch (23) is arranged on the inner wall or outer wall of the medical balloon (21) at a position corresponding to the micro-disk coil (22); The micro-disk coil (22) is connected to an external power source via a conductive wire (24). The external power source inputs a pulse current into the micro-disk coil (22). The pulse current flows through the micro-disk coil, exciting an alternating magnetic field around the micro-disk coil. The metal patch (23) generates eddy currents in the magnetic field. The eddy currents generate repulsive forces in the magnetic field, pushing the metal patch to move. The metal patch (23) drives the balloon wall to expand and contract, forming a shock wave that radiates outward.

2. The electromagnetic pulse shock wave balloon according to claim 1, characterized in that: The medical balloon (21) has insulating properties and can withstand a pressure of at least 4 atm, and a bursting pressure of not less than 10 atm.

3. The electromagnetic pulse shock wave balloon according to claim 2, characterized in that: The micro disc coil (22) is a flat disc-shaped coil that is wound by a wire or manufactured by printing and photolithography technology. The micro disc coil (22) is attached to the outer wall of the medical catheter (25).

4. The electromagnetic pulse shock wave balloon according to claim 3, characterized in that: The metal patch (23) is a conductive metal sheet, which is attached to the inner wall or outer wall of the balloon.

5. The electromagnetic pulse shock wave balloon according to claim 4, characterized in that: When the metal patch (23) is attached to the outer wall of the balloon, the outer surface of the metal patch (23) is coated with an insulating coating.

6. The electromagnetic pulse shock wave balloon according to claim 5, characterized in that: The conductive wire (24) is a metal wire with conductive properties and is wrapped in an insulating sheath.

7. The electromagnetic pulse shock wave balloon according to claim 6, characterized in that: The medical catheter (25) is provided with a first through hole at its axis, and a guide wire is arranged in the first through hole.

8. The electromagnetic pulse shock wave balloon according to claim 7, characterized in that: Small holes are arranged around the first through hole in the medical catheter (25), and the conductive wire (24) is placed in the small holes.

9. The electromagnetic pulse shock wave balloon according to claim 8, characterized in that: The number of the micro disc-shaped coil (22) is one or more, and the number of the metal patches (23) is the same as that of the micro disc-shaped coil (22).

10. A vascular interventional treatment device, characterized in that: The invention comprises a special power supply (1) and an electromagnetic pulse shock wave balloon as described in any one of claims 1 to 9, wherein the special power supply (1) is connected to a conductive wire (24) of the electromagnetic pulse shock wave balloon, and the special power supply (1) inputs a pulse current to a micro-disk coil (22) through the conductive wire (24). The pulse current flows through the micro-disk coil (22), and an alternating magnetic field is excited around the micro-disk coil (22). The metal patch (23) generates eddy currents in the magnetic field, and the eddy currents generate repulsive force in the magnetic field, which pushes the metal patch (23) to move. The metal patch (23) drives the balloon wall to expand and contract, and forms a shock wave that radiates outward.

Images