Handheld ultrasonic system for treating vascular occlusion and use method

Abstract

The invention relates to the technical field of interventional medical instruments, and discloses a handheld ultrasonic system for treating vascular occlusion and a using method.The handheld ultrasonic system for treating vascular occlusion comprises a guide wire used for moving to an internal occlusion part of a blood vessel along the blood vessel, and further comprises a positioning guide wire and a catheter, the positioning guide wire is used for entering the main branch from the side branch to perform reverse puncture on the artery plaque, a positioning guide wire cavity is formed in the catheter, the positioning guide wire can move along the positioning guide wire cavity, a positioning guide wire outlet communicated with the positioning guide wire cavity is formed in the catheter, a balloon is arranged at the far end of the catheter, and the balloon can synchronously move with the catheter in a contraction state; the balloon is additionally arranged at the front end of the catheter, the balloon can be matched with the blood vessel wall or directly form a channel in the balloon in the expansion state, the channel restrains the guide wire to move along the channel, an inlet of the channel is communicated with the guide wire catheter, an outlet of the channel faces the artery plaque, and reverse puncture of the artery plaque is completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of interventional medical devices, and more particularly, to a handheld ultrasound system for treating vascular occlusion. BACKGROUND

[0002] For a CTO lesion with a long occlusion time, the plaque length of the lesion tissue is long, the entry thereof is usually hard, and the end thereof often has calcification phenomenon, forming a fibrous cap, so that the guide wire cannot penetrate the fibrous cap to enter the arterial plaque.

[0003] The guide wire is connected to an ultrasonic amplitude rod to generate axial mechanical vibration along the catheter at the distal end portion of the guide wire, and the guide wire penetrates the fibrous cap to enter the arterial plaque when the guide wire vibrates axially along the catheter;

[0004] When the arterial plaque is long, the arterial plaque needs to be punctured by the forward guide wire and the reverse guide wire, and the reverse guide wire needs to enter the reverse side of the arterial plaque from the arterial collateral branch. For the case that the arterial plaque is close to the reverse collateral branch, the fibrous cap on the reverse side of the arterial plaque is close to the connection between the collateral branch and the main branch. When the reverse guide wire moves, it is hindered by the arterial plaque and will preferentially bend to the side away from the arterial plaque to enter the main branch, so that the reverse guide wire cannot be adjusted to move toward the side of the plaque, and the reverse puncture of the arterial plaque cannot be completed. SUMMARY

[0005] The present application provides a handheld ultrasound system for treating vascular occlusion, which solves the technical problem that the reverse puncture of the arterial plaque cannot be completed in the related art.

[0006] The present application provides a handheld ultrasound system for treating vascular occlusion, which includes a guide wire for moving along a blood vessel to an occlusion site inside the blood vessel, a positioning guide wire for reverse puncturing of an arterial plaque from a collateral branch to a main branch, and a catheter. The catheter is internally provided with a positioning guide wire cavity, the positioning guide wire is movable along the positioning guide wire cavity, the catheter is provided with a positioning guide wire outlet communicating with the positioning guide wire cavity, the distal end of the catheter is provided with a balloon, the balloon is movable synchronously with the catheter in a contracted state, the interior of the catheter is provided with a fluid channel communicating with the interior space of the balloon, the fluid channel extends to the proximal end of the catheter to form a fluid inlet, and the fluid channel is used for supplying fluid into the interior of the balloon to change the balloon from the contracted state to an expanded state.

[0007] When the balloon is in the expanded state, the outer surface thereof includes a B local surface, the B local surface is in contact with a B inner wall surface of the main branch, and the B inner wall surface of the main branch can resist the movement trend of the balloon toward the B inner wall surface. The movement trend is generated by the force acting on the balloon in the direction of the B inner wall surface of the main branch when the positioning guide wire moves along the guide channel.

[0008] The outer surface of the balloon in the expanded state comprises a C local surface, the C local surface is in contact with a D inner wall surface of the side branch, the D inner wall surface of the side branch can resist the movement tendency of the balloon to the D inner wall surface, the movement tendency is caused by the force generated by the positioning guide wire moving along the guide channel towards the D inner wall surface;

[0009] The guide channel is formed between the outer surface of the balloon, the C inner wall surface of the side branch and the A inner wall surface of the main branch when the balloon is in the expanded state;

[0010] Alternatively, the guide channel is formed in the interior of the balloon;

[0011] The outlet of the guide channel is directed towards the arterial plaque.

[0012] Further, when the catheter is moved into the vascular cavity of the part where the main branch and the side branch are communicated, fluid is supplied into the interior of the balloon to change the balloon from the contracted state to the expanded state.

[0013] Further, the fluid is a developing liquid.

[0014] Further, the catheter is rotated to adjust the posture of the balloon when the balloon is inflated to a state where the B local surface and the C local surface can be distinguished, and the balloon is inflated to the expanded state after the posture adjustment is completed.

[0015] A balloon expanding method suitable for the handheld ultrasonic system for treating vascular occlusion, and specifically comprising the following steps:

[0016] Step 201, moving the distal end of the catheter into the vascular cavity of the part where the main branch and the side branch are communicated;

[0017] Step 202, supplying fluid into the interior of the balloon, the volume of the supplied fluid is 65% to 80% of the volume of the balloon in the expanded state;

[0018] Step 203, rotating the catheter to adjust the posture of the balloon, so that the B local surface of the balloon is close to the B inner wall surface of the main branch, and the C local surface of the balloon is close to the D inner wall surface of the side branch;

[0019] Step 204, supplying fluid into the interior of the balloon to make the balloon reach the expanded state.

[0020] Further, the outer surface of the balloon in the expanded state comprises an A local surface, the A local surface can cooperate with the C inner wall surface of the side branch and the A inner wall surface of the main branch to form the guide channel.

[0021] Further, the positioning guide wire outlet is located on the outside of the balloon, and the positioning guide wire outlet is located on the side of the balloon close to the proximal end of the catheter.

[0022] Further, the A local surface is provided with an A recess, and the connecting part of the C inner wall surface of the side branch and the A inner wall surface of the main branch has the same shape as the A recess.

[0023] Further, the distal end of the catheter is further provided with a secondary balloon, and the secondary balloon is located on the side of the balloon close to the distal end of the catheter.

[0024] Further, the front end of the catheter is connected with a flexible section, the flexible section is connected with a folding section, the folding section and the front end of the catheter are fixedly connected with the inner wall of the balloon, when the balloon is in a contracted state, the flexible section is in a folded state, and the folding section is coaxially arranged with the catheter.

[0025] The beneficial effects of the present application are that: by increasing the balloon at the front end of the catheter, the balloon can cooperate with the blood vessel wall or directly form a channel inside in the expanded state, the channel restricts the movement of the guide wire along the channel, and the inlet of the channel is communicated with the guide wire catheter, and the outlet of the channel is directed to the arterial plaque, so that the reverse puncture of the arterial plaque 13 is completed. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of a handheld ultrasonic device for treating vascular occlusion of the present application;

[0027] Figure 2 is a schematic diagram of the structure of the ultrasonic transducer of the present application;

[0028] Figure 3 is a schematic diagram of the longitudinal vibration mode of the interventional guide wire of the present application;

[0029] Figure 4 is a schematic diagram of the transverse vibration mode of the interventional guide wire of the present application;

[0030] Figure 5 is a schematic diagram of the structure of the arterial plaque and the side branch in the blood vessel of the present application;

[0031] Figure 6 is a schematic diagram of the balloon and the secondary balloon in a contracted state of the present application;

[0032] Figure 7 is a schematic diagram of the balloon and the secondary balloon in an expanded state of the present application;

[0033] Figure 8 is a schematic diagram of the folding section in the blood vessel when the balloon is in an expanded state of the present application;

[0034] Figure 9 is a schematic diagram of the catheter and the folding section in a local state when the balloon is in an expanded state of the present application;

[0035] Figure 10 is a schematic diagram of the catheter and the folding section in a local state when the balloon is in a contracted state of the present application.

[0036] In the figure: 1, operating handle; 2, ultrasonic transducer driving circuit board; 3, threaded connecting piece; 4, battery; 5, saddle-shaped clamp; 6, ultrasonic transducer; 7, interventional guide wire; 8, backing layer; 9, piezoelectric layer; 9-1, piezoelectric ceramic sheet one; 9-2, piezoelectric ceramic sheet two; 10, electrode; 10-1, negative electrode; 10-2, positive electrode; 11, amplitude transformer; 12, blood vessel; 13, arterial plaque; 14, positioning guide wire; 15, catheter; 16, balloon; 17, A partial surface; 18, A inner wall surface; 19, B partial surface; 20, B inner wall surface; 21, C partial surface; 22, C inner wall surface; 23, D inner wall surface; 24, auxiliary balloon; 25, A recess; 26, flexible section; 27, folding section. DETAILED DESCRIPTION

[0037] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is merely meant to provide a better understanding of the subject matter described herein and can be changed in function and arrangement without departing from the scope of the disclosure. Various processes or components can be omitted, substituted, or added according to desired implementations. Additionally, features described with respect to some examples can be combined in other examples.

[0038] As shown in FIG. 1, a handheld ultrasonic system for treating vascular occlusion includes: Figures 1-4

[0039] An interventional guide wire 7 is used to move along the blood vessel 12 to the occlusion site inside the blood vessel 12;

[0040] The proximal end of the interventional guide wire 7 is connected to the ultrasonic transducer, and the mechanical output end of the ultrasonic transducer acts on the proximal end of the interventional guide wire 7, causing the proximal end of the interventional guide wire 7 to produce mechanical vibration perpendicular to the axial direction of the interventional guide wire 7 or along the axial direction of the interventional guide wire 7, and the mechanical vibration of the proximal end of the interventional guide wire 7 can be transmitted to the distal end of the interventional guide wire 7.

[0041] In one embodiment of the present application, the material of the interventional guide wire 7 is titanium alloy.

[0042] In one embodiment of the present application, the length of the interventional guide wire 7 is 0.1-3 m.

[0043] In one embodiment of the present application, the proximal end of the interventional guide wire 7 is rigidly connected to the ultrasonic transducer 6 through the threaded connecting piece 3, and the distal end is inserted into the occlusion site inside the blood vessel 12.

[0044] In one embodiment of the present application, the threaded connecting piece 3 includes a threaded mounting head, a fastening cap, and an interventional guide wire 7 mounting hole, and the fastening cap clamps the interventional guide wire 7 by rotating the threads.​

[0045] In one embodiment of the present invention, the handheld ultrasound system for treating vascular occlusion further includes accessories, including fastening screws and saddle-shaped clamps 5. The fastening screws are used for mounting the housing, the ultrasound transducer 6, the ultrasound transducer drive circuit board 2, and the battery 4, and the saddle-shaped clamps 5 are used for fixing the ultrasound transducer 6.

[0046] In one embodiment of the present invention, the ultrasonic transducer 6 is located inside the operating handle 1. The operating handle 1 includes a housing, and the housing also contains an ultrasonic transducer 6 drive circuit board and a battery 4. The housing is provided with an operating button connected to the ultrasonic transducer 6 drive circuit board, and the housing is also provided with a display screen.

[0047] In one embodiment of the present invention, the outer casing includes an upper casing and a lower casing, which are assembled by screws. The lower casing has a boss inside for mounting an ultrasonic transducer 6, a drive circuit board for the ultrasonic transducer 6, and a battery 4. The upper casing has operation buttons and a display screen mounting hole.

[0048] In one embodiment of the present invention, the ultrasonic transducer 6 includes a backing layer 8, a piezoelectric layer 9, an electrode 10 and an arterial plaque 13. The diameter of the ultrasonic transducer 6 is in the range of 5 to 20 mm. The frequency range of the ultrasonic transducer 6 is 20 to 100 kHz. The vibration mode of the ultrasonic transducer 6 is longitudinal vibration along its axial direction.

[0049] Electrode 10 includes a positive electrode 10-1 and a negative electrode 10-2.

[0050] The piezoelectric layer 9 includes two adjacent piezoelectric ceramic sheets, 9-1 and 9-2. The polarization direction of the piezoelectric ceramic sheets is parallel to the axial direction of the ultrasonic transducer 6. The polarization directions of two adjacent piezoelectric ceramic sheets are opposite, and the number of piezoelectric sheets is even.

[0051] In one embodiment of the present invention, the ultrasonic transducer 6 driving circuit board is used to excite the ultrasonic transducer 6 to generate ultrasonic waves; the ultrasonic transducer 6 driving circuit board has frequency tracking function, ultrasonic transducer 6 impedance detection and real-time temperature measurement function, and can achieve impedance matching with the transducer in real time. The ultrasonic transducer 6 driving circuit board is provided with 5 levels for adjusting the output voltage.

[0052] In one embodiment of the present invention, the battery 4 is a rechargeable DC lithium battery 4 with an output voltage range of 3–50V. The battery 4 is used to power the drive circuit board of the ultrasonic transducer 6, and the battery 4 is equipped with a charging interface and a charger.

[0053] In one embodiment of the present invention, the output terminal of the ultrasonic transducer drive circuit board 2 is electrically connected to the output terminal of the ultrasonic transducer 6, and the output terminal of the battery 4 is electrically connected to the input terminal of the ultrasonic transducer drive circuit board 2.

[0054] In one embodiment of the present invention, the interventional guidewire 7 is used to transmit the energy emitted by the ultrasonic transducer 6 and generate large-amplitude high-frequency vibrations at its distal end, including axial vibrations and lateral vibrations.

[0055] In one embodiment of the present invention, the operation button is used to control the ultrasonic transducer 6 drive circuit board. The operation button includes a switch button, an up adjustment button, and a down adjustment button. The switch button is used to control the opening and closing of the ultrasonic transducer 6 drive circuit board. The up adjustment button is used to increase the output voltage of the ultrasonic transducer 6 drive circuit board. The down adjustment button is used to decrease the output voltage of the ultrasonic transducer 6 drive circuit board.

[0056] In one embodiment of the present invention, the display screen is used to display the gear position and corresponding output voltage of the ultrasonic transducer 6 drive circuit board, and the display screen is mounted on the upper housing by adhesive bonding.

[0057] In one embodiment of the present invention, the method of use involves transmitting ultrasonic energy generated by the ultrasonic transducer 6 through the interventional guidewire 7 to generate large-amplitude high-frequency vibration at the distal end of the interventional guidewire 7. The high-frequency vibration includes longitudinal vibration along the axis of the interventional guidewire 7 and transverse vibration perpendicular to the axis of the interventional guidewire 7. The longitudinal vibration is used to enable the interventional guidewire 7 to pass through the occlusion site of the blood vessel 12 and form a small-sized blood flow channel. The transverse vibration is used to expand the blood flow channel by the transverse vibration of the interventional guidewire 7 on the basis of establishing the small-sized blood flow channel by the longitudinal vibration, thereby improving the treatment effect and establishing a channel for subsequent treatment devices such as the blood vessel 12 stent and balloon catheter.

[0058] In one embodiment of the present invention, the generation of longitudinal vibration and transverse vibration is mainly regulated in two ways: (1) when the length of the interventional guidewire 7 remains unchanged, the longitudinal or transverse vibration of the interventional guidewire 7 is regulated by adjusting the working frequency of the ultrasonic transducer 6; (2) when the working frequency of the ultrasonic transducer 6 is fixed, the longitudinal or transverse vibration of the interventional guidewire 7 is regulated by adjusting the length of the interventional guidewire 7 (i.e., replacing the interventional guidewire 7 with one of different lengths).

[0059] In at least one embodiment of the present invention, a method of using a handheld ultrasound system for treating vascular occlusion is provided, comprising the following steps:

[0060] Step 101: The positioning guidewire 14 is inserted through the blood vessel 12 and, under ultrasound guidance, is inserted into the occlusion site of the blood vessel 12. Then, the positioning guidewire 14 is inserted into the sheath of the blood vessel 12 to create a channel for the interventional guidewire 7.

[0061] Step 102: The interventional guidewire 7 is delivered through the sheath of the blood vessel 12 to the occlusion site of the blood vessel 12, so that the distal end of the interventional guidewire 7 contacts the occlusion site of the blood vessel 12, and then the proximal end of the interventional guidewire 7 is installed on the amplitude rod 11 of the ultrasound transducer 6 through a threaded connection.

[0062] Step 103: Set the frequency and operating voltage of the ultrasound, and turn on the switch button on the operating handle 1 to activate the ultrasound transducer 6, which emits high-frequency ultrasound vibrations. The ultrasound energy is transmitted through the interventional guidewire 7 to its distal end. First, through frequency control, the interventional guidewire 7 is placed in a longitudinal vibration mode, generating a large-amplitude longitudinal vibration along the guidewire axis at its distal end, allowing the interventional guidewire 7 to penetrate the occlusion site of blood vessel 12. Then, move the operating handle 1 back and forth to move the interventional guidewire 7 back and forth, allowing it to penetrate the entire occlusion site of blood vessel 12 during continuous contact, thus establishing a blood flow channel. The operating voltage of the ultrasound transducer 6 can be adjusted according to the actual situation.

[0063] Step 104: Adjust the working frequency of the ultrasound transducer 6 to put the interventional guidewire 7 in the lateral vibration mode, and move the external operating handle 1 back and forth to move the guidewire back and forth within the previously established blood vessel 12 channel. During this process, the lateral vibration generated by the amplitude rod 11 continuously expands the opened blood flow channel.

[0064] The occlusion site of the entire vessel 12 has been effectively opened. Further treatment can be carried out by implanting a vessel 12 stent or an expandable balloon catheter, depending on the actual situation.

[0065] Using the aforementioned method, the occlusion site of blood vessel 12 can be opened quickly and efficiently, and a blood flow channel can be established rapidly, thus making blood vessel 12 occlusion surgeries easier and simpler. Furthermore, the handheld ultrasound device of this invention is compact, portable, and easy to operate.

[0066] It cannot be ruled out that the interventional guidewire 7 and the positioning guidewire 14 may be the same guidewire.

[0067] like Figure 5 As shown, when the arterial plaque 13 is long, it is necessary to use both antegrade and retrograde guidewires to puncture the arterial plaque 13. When puncturing with the retrograde guidewire, it is necessary to enter the retrograde side of the arterial plaque 13 from the collateral branch. When the arterial plaque 13 is close to the retrograde collateral branch, the fibrous cap on the retrograde side of the arterial plaque 13 is close to the connection between the collateral branch and the main branch. When the retrograde guidewire moves, it will be obstructed by the arterial plaque 13 and will preferentially bend to the side away from the arterial plaque 13 to enter the main branch. It is impossible to adjust the retrograde guidewire to move towards the plaque side, and it is impossible to complete the retrograde puncture of the arterial plaque 13.

[0068] To address this problem, in at least one embodiment of the present invention, a handheld ultrasound system for treating vascular occlusion is provided, further comprising a positioning guidewire 14 and a catheter 15. The positioning guidewire 14 is used to enter the main branch from a collateral branch to perform retrograde puncture of the arterial plaque 13. The catheter 15 has a positioning guidewire lumen inside, and the positioning guidewire 14 can move along the positioning guidewire lumen. The catheter 15 has a positioning guidewire 14 outlet communicating with the positioning guidewire lumen. The distal end of the catheter 15 is provided with a balloon 16, which can move synchronously with the catheter 15 when in a contracted state. The interior of the catheter 15 has a fluid channel communicating with the interior space of the balloon 16. The fluid channel extends to the proximal end of the catheter 15 to form a fluid inlet. The fluid channel is used to supply fluid into the balloon 16 to change the balloon 16 from a contracted state to an expanded state.

[0069] When the balloon 16 is in the deployed state, its outer surface includes a partial surface B 19, which contacts the inner wall surface B 20 of the main branch. The inner wall surface B 20 of the main branch can resist the tendency of the balloon 16 to move toward the inner wall surface B 20. This tendency is generated by the force exerted on the balloon 16 toward the inner wall surface B 20 of the main branch when the positioning guide wire 14 moves along the guide channel.

[0070] When the balloon 16 is in the deployed state, its outer surface includes a partial surface C 21, which contacts the inner wall surface D 23 of the side branch. The inner wall surface D 23 of the side branch can resist the tendency of the balloon 16 to move toward the inner wall surface D 23. This tendency is generated by the force exerted on the balloon 16 toward the inner wall surface D 23 when the positioning guide wire 14 moves along the guide channel.

[0071] When the balloon 16 is in the deployed state, a guide channel is formed between the outer surface of the balloon 16, the inner wall surface 22 of the C side branch, and the inner wall surface 18 of the A side branch.

[0072] Alternatively, the guide channel is formed inside the balloon 16;

[0073] The exit of the guide channel faces the arterial plaque 13.

[0074] When the catheter 15 moves into the lumen of the blood vessel 12 where the main branch and the collateral branch are connected, fluid is supplied into the balloon 16 to change the balloon 16 from a contracted state to an expanded state, thereby forming a guide channel with the opening facing the arterial plaque 13. The moving positioning guidewire 14 moves through the guide channel so that it can move towards the side facing the arterial plaque 13 when it enters the main branch from the collateral branch.

[0075] In one embodiment of the invention, the fluid is a contrast agent. This allows for the localization of the balloon 16 within the human body and blood vessel 12.

[0076] Furthermore, in order to ensure that the balloon 16 can achieve the aforementioned specific posture when it is deployed, in combination with the irregular structure of the balloon 16, the catheter 15 can be rotated to adjust the posture of the balloon 16 when the balloon 16 is inflated to the point where the B local surface 19 and the C local surface 21 can be distinguished. After the posture adjustment is completed, the balloon 16 is inflated to the deployed state.

[0077] Furthermore, in one embodiment of the present invention, a method for deploying a balloon 16 is provided, comprising the following steps:

[0078] Step 201: Move the distal end of catheter 15 into the lumen of blood vessel 12 in the part where the main branch and collateral branch communicate;

[0079] Step 202: Fluid is supplied into the balloon 16, and the volume of the supplied fluid is 65% to 80% of the volume of the balloon 16 in its deployed state.

[0080] Step 203: Rotate the catheter 15 to adjust the posture of the balloon 16 so that the B local surface 19 of the balloon 16 is close to the B inner wall surface 20 of the main branch; and so that the C local surface 21 of the balloon 16 is close to the D inner wall surface 23 of the lateral branch.

[0081] Step 204: Fluid is supplied into the balloon 16 to make the balloon 16 deploy.

[0082] The following embodiment provides a guide channel formed between the outer surface of the balloon 16, the inner wall surface 22 of the C-branch of the lateral branch, and the inner wall surface 18 of the A-branch of the main branch:

[0083] In one embodiment of the present invention, when the balloon 16 is in the deployed state, its outer surface includes a partial surface A 17, which can cooperate with the inner wall surface C 22 of the side branch and the inner wall surface A 18 of the main branch to form a guide channel.

[0084] The outlet of the positioning guidewire 14 is located outside the balloon 16, and the outlet of the positioning guidewire 14 is located on the side of the balloon 16 near the proximal end of the catheter 15; the catheter 15 is also provided with an auxiliary positioning guidewire 14, which can extend from the distal end of the catheter 15.

[0085] The auxiliary positioning guidewire 14 is used to guide the catheter 15 and balloon 16 to a predetermined position. After the balloon 16 is deployed, the positioning guidewire 14 extends from the catheter 15 and moves toward the guide channel.

[0086] In one embodiment of the present invention, a recessed portion 25 is provided on a partial surface 17, and the connection portion of the inner wall surface 22 of the side branch and the inner wall surface 18 of the main branch has the same shape as the recessed portion 25.

[0087] In one embodiment of the present invention, the distal end of the catheter 15 is further provided with a secondary balloon 24, which is located on the side of the balloon 16 near the distal end of the catheter 15.

[0088] For such an embodiment, such as Figures 6-7 As shown, the catheter 15 first enters the main branch from the collateral branch through the auxiliary positioning guidewire 14 and moves a distance away from the arterial plaque 13. Then, the catheter 15 moves to the inside of the main branch along the guidewire 14 and the balloon 16 is deployed. When the balloon 16 is deployed, the accessory balloon 24 provides additional support for the balloon 16 to prevent it from shifting.

[0089] In one embodiment of the present invention, the accessory balloon 24 and the main body are an integral structure.

[0090] The following provides an embodiment in which the guide channel is formed inside the balloon 16:

[0091] In one embodiment of the present invention, such as Figures 8-10 As shown, the front end of the catheter 15 is connected to the flexible section 26, the flexible section 26 is connected to the folded section 27, and both the folded section 27 and the front end of the catheter 15 are fixedly connected to the inner wall of the balloon 16. When the balloon 16 is in a contracted state, the flexible section 26 is in a folded state, and the folded section 27 is coaxially arranged with the catheter 15.

[0092] During the process of balloon 16 changing from the contracted state to the deployed state, folded segment 27 rotates around its hinge point with catheter 15 until the end of folded segment 27 away from catheter 15 is positioned toward arterial plaque 13; flexible segment 26 is deployed into an arc shape.

[0093] Since the balloon 16 is wrapped around the catheter 15 and the folded section 27 when it is in the contracted state, the folded section 27 will not rotate around the hinge point due to the restriction of the balloon 16.

[0094] In one embodiment of the present invention, the flexible segment 26 is sleeved on the outside of the catheter 15 and the folded segment 27;

[0095] In one embodiment of the invention, the two ends of the flexible segment 26 are connected to the inner walls of the conduit 15 and the folded segment 27.

[0096] The embodiments of this example have been described above. However, this example is not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this example, and all of them are within the protection scope of this example.

Claims

1. A hand-held ultrasound system for treating a vascular occlusion, comprising: The guide wire is used to move along the blood vessel to the inside occlusion site of the blood vessel, characterized in that it further comprises a positioning guide wire (14) and a catheter (15), the positioning guide wire (14) is used to perform reverse puncture on the arterial plaque (13) from the side branch into the main branch, the catheter (15) is internally provided with a positioning guide wire cavity, the positioning guide wire (14) can move along the positioning guide wire cavity, the catheter (15) is provided with a positioning guide wire (14) outlet communicating with the positioning guide wire cavity, the distal end of the catheter (15) is provided with a balloon (16), the balloon (16) can move synchronously with the catheter (15) in the contracted state, the inside of the catheter (15) is provided with a fluid channel communicating with the inside space of the balloon (16), the fluid channel extends to the proximal end of the catheter (15) to form a fluid inlet, and the fluid channel is used to supply fluid into the inside of the balloon (16) to make the balloon (16) change from the contracted state to the expanded state. The outer surface of the balloon (16) in the expanded state comprises a B local surface (19), the B local surface (19) is in contact with the B inner wall surface (20) of the main branch, the B inner wall surface (20) of the main branch can resist the movement tendency of the balloon (16) to the B inner wall surface (20), and the movement tendency is caused by the action force of the positioning guide wire (14) on the balloon (16) in the direction of the B inner wall surface (20) of the main branch when the positioning guide wire (14) moves along the guide channel. The outer surface of the balloon (16) in the expanded state comprises a C local surface (21), the C local surface (21) is in contact with the D inner wall surface (23) of the side branch, the D inner wall surface (23) of the side branch can resist the movement tendency of the balloon (16) to the D inner wall surface (23), and the movement tendency is caused by the action force of the positioning guide wire (14) on the balloon (16) in the direction of the D inner wall surface (23) when the positioning guide wire (14) moves along the guide channel. The guide channel is formed between the outer surface of the balloon (16), the C inner wall surface (22) of the side branch and the A inner wall surface (18) of the main branch in the expanded state of the balloon (16). Alternatively, the guide channel is formed in the inside of the balloon (16). The outlet of the guide channel is directed towards the arterial plaque (13).

2. A hand-held ultrasound system for treating a vascular occlusion according to claim 1, wherein, When the catheter (15) moves into the cavity of the blood vessel (12) at the part where the main branch and the side branch communicate, the fluid is supplied into the inside of the balloon (16) to make the balloon (16) change from the contracted state to the expanded state.

3. A hand-held ultrasound system for treating a vascular occlusion according to claim 2, wherein, The fluid is a developing solution.

4. The hand-held ultrasound system for treating a vascular occlusion of claim 2, wherein, The balloon (16) is inflated to the expanded state after the posture of the balloon (16) is adjusted by rotating the catheter (15) when the balloon (16) is inflated to the state capable of distinguishing the B local surface (19) and the C local surface (21).

5. A method of balloon deployment, characterized by, The balloon expansion method is suitable for the handheld ultrasonic system for treating blood vessel occlusion as claimed in any one of claims 1-4, and specifically comprises the following steps: Step 201, moving the distal end of the catheter (15) into the cavity of the blood vessel (12) at the part where the main branch and the side branch communicate; Step 202, supplying fluid into the inside of the balloon (16), and the volume of the supplied fluid is 65%-80% of the volume of the balloon (16) in the expanded state; Step 203, rotating the catheter (15) to adjust the posture of the balloon (16), so that the B local surface (19) of the balloon (16) is close to the B inner wall surface (20) of the main branch; the C local surface (21) of the balloon (16) is close to the D inner wall surface (23) of the side branch; Step 204, supplying fluid into the balloon (16) to make the balloon (16) reach the expanded state.

6. A hand-held ultrasound system for treating a vascular occlusion as defined in claim 5, wherein, The outer surface of the balloon (16) in the expanded state includes an A local surface (17), which can cooperate with the C inner wall surface (22) of the side branch and the A inner wall surface (18) of the main branch to form a guide channel.

7. A hand-held ultrasound system for treating a vascular occlusion as defined in claim 5, wherein, The outlet of the positioning guide wire (14) is located outside the balloon (16), and the outlet of the positioning guide wire (14) is located on the side of the balloon (16) close to the proximal end of the catheter (15).

8. The hand-held ultrasound system for treating a vascular occlusion of claim 6, wherein, An A recess (25) is arranged on the A local surface (17), and the connecting part of the C inner wall surface (22) of the side branch and the A inner wall surface (18) of the main branch has the same shape as the A recess (25).

9. The hand-held ultrasound system for treating a vascular occlusion of claim 5, wherein, The distal end of the catheter (15) is further provided with a secondary balloon (24), and the secondary balloon (24) is located on the side of the balloon (16) close to the distal end of the catheter (15).

10. The hand-held ultrasound system for treating a vascular occlusion of claim 5, wherein, The front end of the catheter (15) is connected with a flexible section (26), the flexible section (26) is connected with a folding section (27), and the folding section (27) and the front end of the catheter (15) are fixedly connected with the inner wall of the balloon (16). When the balloon (16) is in the contracted state, the flexible section (26) is in the folded state, and the folding section (27) is coaxially arranged with the catheter (15).

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