A pulsed ablation device

Abstract

The application relates to the technical field of medical devices, in particular to a pulse ablation device which comprises a handle, a first supporting rod, a second supporting rod, a first ablation electrode ring and a second ablation electrode ring; when a pulse ablation operation is performed, a circular ring-shaped pulse electric field is constructed by means of the circular ring-shaped first ablation electrode ring and the second ablation electrode ring, instead of a traditional single-orientation strip-shaped pulse electric field, and the pulse ablation device does not need to be rotated frequently. On the one hand, the first supporting rod can be moved along the axial direction of the first supporting rod to drive the second supporting rod, the first ablation electrode ring and the second ablation electrode ring to move along the axial direction of the first supporting rod. On the other hand, the first supporting rod can be plastically deformed to drive the first ablation electrode ring and the second ablation electrode ring to move synchronously and rotate synchronously at multiple angles, so that the ablation electrode rings can be closely attached to tissues at different positions, the transmission efficiency of ablation energy is guaranteed, and the flexibility of the operation is improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a pulse ablation device. Background Technology

[0002] Pulsed electric field ablation technology uses intermittent, high-intensity pulsed electric fields ranging from microseconds to nanoseconds to induce irreversible electroporation of cell membranes, disrupting intracellular homeostasis and leading to apoptosis. Because the electroporation threshold of cardiac cells is lower than that of surrounding tissues, myocardial tissue can be selectively ablated with minimal damage to surrounding normal tissues. Ablation requires the use of a pulsed ablation device.

[0003] The existing pulse ablation device includes a handle, a support tube, a first ablation electrode, and a second ablation electrode. One end of the support tube is fixedly connected to the handle. The first ablation electrode is elongated and fixed along the axial direction of the support tube at the end furthest from the handle. The second ablation electrode is also elongated and fixed along the axial direction of the support tube at the end furthest from the handle. An ablation gap is formed between the elongated first and second ablation electrodes. A pulsed power supply is used to power the first and second ablation electrodes to create a pulsed electric field in the ablation gap.

[0004] The existing technical solutions described above have the following drawbacks: the intensity of the pulsed electric field is related to the spacing between the ablation electrodes, and the position of the pulsed electric field is related to the position of the ablation electrodes. Since the relative positions of the ablation electrodes and the handle are fixed, and the relative positions of the first and second ablation electrodes are fixed, the intensity and position of the pulsed electric field are also relatively fixed, which greatly restricts the flexibility of the ablation procedure. Summary of the Invention

[0005] To improve the flexibility of pulse ablation surgery, this application provides a pulse ablation device.

[0006] This application provides a pulse ablation device, which adopts the following technical solution:

[0007] A pulse ablation device, comprising:

[0008] Handle;

[0009] The first support rod, one end of which is slidably installed inside the handle, is capable of plastic deformation;

[0010] The second support rod is installed at the end of the handle away from the first support rod;

[0011] The first ablation electrode ring is sleeved on the outer wall of the second support rod;

[0012] The second ablation electrode ring is sleeved on the outer wall of the second support rod, forming an ablation gap with the first ablation electrode ring.

[0013] By adopting the above technical solution, during pulse ablation surgery, a circular pulsed electric field is constructed using the first and second annular ablation electrode rings, replacing the traditional unidirectional strip-shaped pulsed electric field. This eliminates the need for frequent rotation of the pulse ablation device, improving surgical flexibility. On one hand, the first support rod can move along its own axis, driving the second support rod, the first ablation electrode ring, and the second ablation electrode ring to move along the axis of the first support rod. This allows adjustment of the pulsed electric field formation position, further enhancing surgical flexibility. On the other hand, the first support rod can undergo plastic deformation, enabling the first and second ablation electrode rings to move synchronously and rotate synchronously at multiple angles to adapt to different tissue orientations. This ensures that each ablation electrode ring remains tightly attached to the tissue, guaranteeing efficient energy transfer and improving surgical flexibility. For patients with anatomical variations or undergoing secondary surgery, the first and second ablation electrode rings can smoothly reach the target ablation area without the need to change instruments or create larger wounds, reducing the risk of infection. Since there is no need to repeatedly adjust the overall angle of the pulse ablation device, thus avoiding interference with established anatomical landmarks, the accuracy of the operation is improved.

[0014] This application further includes:

[0015] An axial position adjustment mechanism is mounted on the handle and connected to the first support rod. It is used to drive the first support rod to move along its own axial direction, thereby driving the second support rod, the first ablation electrode ring, and the second ablation electrode ring to move.

[0016] By adopting the above technical solution, the axial position adjustment mechanism is used to drive the first support rod to move along its own axial direction, so as to drive the second support rod, the first ablation electrode ring and the second ablation electrode ring to move along the axial direction of the first support rod, thereby achieving the purpose of adjusting the position of the first ablation electrode ring and the second ablation electrode ring in the axial direction of the handle, so that the position of the pulse electric field can be adjusted.

[0017] This application further specifies that a limiting groove is formed on the outer wall of the end of the handle near the second support rod;

[0018] The axial position adjustment mechanism includes:

[0019] A sliding ring is slidably fitted onto the outer wall of the handle;

[0020] The first locking element is installed on the sliding ring and can cooperate with the limiting groove to restrict the movement of the sliding ring or release the restriction on the sliding ring.

[0021] The follower ring is slidably installed inside the handle and sleeved on the end of the first support rod away from the second support rod; the follower ring is fixedly connected to the sliding ring and can move with the sliding ring to drive the first support rod, the second support rod, the first ablation electrode ring and the second ablation electrode ring to move.

[0022] By adopting the above technical solution, when the first locking member releases its restriction on the sliding ring, the operator's hand can drive the sliding ring to slide along the axial direction of the handle, thereby causing the follower ring to slide along the axial direction of the handle, and further causing the first support rod, the second support rod, the first ablation electrode ring, and the second ablation electrode ring to move along the axial direction of the handle. After the first ablation electrode ring and the second ablation electrode ring have moved into place, the first locking member engages with the limiting groove to restrict the movement of the sliding ring.

[0023] This application further specifies that the axial position adjustment mechanism also includes:

[0024] A positioning ring is installed inside the handle, and a positioning hole is formed in the middle; the positioning hole matches the end of the first support rod.

[0025] The constraint block is installed at one end of the handle near the second support rod, and a clearance hole is formed in the middle for the first support rod to pass through.

[0026] By adopting the above technical solution, the positioning ring facilitates the positioning and installation of the first support rod. The constraint block can constrain the movement direction of the first support rod, serving as a guide. Simultaneously, it improves the strength of the connection between the first support rod and the handle.

[0027] This application further includes:

[0028] The tilt angle adjustment mechanism is installed on the handle, the first support rod, and the second support rod, and is connected to the first ablation electrode ring and the second ablation electrode ring respectively, and is used to adjust the tilt angle of the first ablation electrode ring and the second ablation electrode ring.

[0029] By adopting the above technical solution, the tilt angle adjustment mechanism is used to adjust the tilt angle of the surfaces where the first ablation electrode ring and the second ablation electrode ring are located, so that the position where the pulse electric field is formed can be adjusted.

[0030] This application further specifies that the tilt angle adjustment mechanism includes:

[0031] The first support ring is sleeved on the outer wall of the second support rod near the end of the first support rod;

[0032] The second support ring is sleeved on the outer wall of the end of the second support rod that is away from the first support rod;

[0033] The first airbag is sleeved on the end of the second support rod near the first support rod, with one end face fixedly connected to one end face of the first support ring and the other end face fixedly connected to the end face of the first ablation electrode ring away from the second ablation electrode ring.

[0034] The second airbag is fitted onto the middle of the second support rod. One end face is fixedly connected to the end face of the first ablation electrode ring near the second ablation electrode ring, and the other end face is fixedly connected to the end face of the second ablation electrode ring near the first ablation electrode ring.

[0035] The third airbag is sleeved on the end of the second support rod near the first support rod. One end face is fixedly connected to the end face of the second ablation electrode ring away from the first ablation electrode ring, and the other end face is fixedly connected to one end face of the second support ring.

[0036] A rotating shaft, whose axis is perpendicular to the axis of the second support rod, is rotatably mounted on the end of the second support rod away from the first support rod.

[0037] There are two rotating blocks, which are respectively fitted onto the opposite ends of the rotating shaft and can rotate with the rotating shaft.

[0038] There are four first follower ropes; one end of two of the first follower ropes is fixedly connected to the opposite sides of one of the rotating blocks, and the other end is fixedly connected to one side of the first ablation electrode ring and one side of the second ablation electrode ring, respectively; one end of the other two first follower ropes is fixedly connected to the opposite sides of another rotating block, and the other end is fixedly connected to the other side of the first ablation electrode ring and the other side of the second ablation electrode ring, respectively.

[0039] The worm gear is fitted into the middle of the rotating shaft;

[0040] The worm is rotatably mounted on the end of the second support rod away from the first support rod, and its side wall is meshed with the side wall of the worm wheel;

[0041] The pulley is rotatably mounted on the end of the second support rod away from the first support rod, and its middle part is fixedly connected to one end of the worm gear;

[0042] The first drive rope is wound around the reel, with its two ends passing through the inside of the second support rod, the inside of the first support rod, and the inside of the handle, respectively, and extending to the outside of the handle;

[0043] The second locking element is located at the end of the handle away from the first support rod, and is used to restrict the movement of the first drive rope or release the restriction on the first drive rope.

[0044] By adopting the above technical solution, the first and second support rings provide rigid support, while the first, second, and third airbags provide flexible support. The operator's hand can drive one end of the first drive rope away from the handle, causing the other end to move towards the handle. During this process, the rope wheel rotates clockwise or counterclockwise by a certain angle, which in turn drives the worm gear to rotate clockwise or counterclockwise by a certain angle. This, in turn, drives the worm wheel, rotating shaft, and two rotating blocks to rotate clockwise or counterclockwise by a certain angle, which in turn causes the first and second ablation electrode rings to tilt via the first follower rope. Overall, the flexible transmission method significantly reduces the weight and inertia of the transmission components, resulting in higher movement speed and flexibility for the first and second ablation electrode rings. It also allows for power transmission around obstacles in narrow or non-linear transmission paths. It enables long-distance, high-efficiency transmission with lower maintenance costs.

[0045] This application further includes:

[0046] An axial spacing adjustment mechanism is installed on the handle, the first support rod, and the second support rod, and is connected to the first ablation electrode ring and the second ablation electrode ring, respectively, for adjusting the spacing between the first ablation electrode ring and the second ablation electrode ring.

[0047] By adopting the above technical solution, the axial spacing adjustment mechanism is used to adjust the spacing between the surfaces where the first ablation electrode ring and the second ablation electrode ring are located, so that the intensity of the pulse electric field can be adjusted.

[0048] This application further specifies that the axial spacing adjustment mechanism includes:

[0049] There are two first fixed pulleys, which are rotatably mounted on opposite sides of the end of the second support rod away from the first support rod.

[0050] There are two second fixed pulleys, each rotatably mounted on the middle of the end of the second support rod away from the first support rod;

[0051] There are two third fixed pulleys, each rotatably mounted inside the end of the handle near the first support rod;

[0052] The fourth fixed pulley consists of two pulleys, which are rotatably mounted on opposite sides inside the handle near the first support rod.

[0053] There are two second drive ropes; one end of one second drive rope is fixedly connected to one side of the first ablation electrode ring, and the other end passes through one first fixed pulley and one second fixed pulley in sequence, then passes through the interior of the second support rod, the interior of the first support rod and the interior of the handle, and then passes through one third fixed pulley and one fourth fixed pulley in sequence before extending to the exterior of the handle; one end of the other second drive rope is fixedly connected to the other side of the first ablation electrode ring, and the other end passes through another first fixed pulley and another second fixed pulley in sequence, then passes through the interior of the second support rod, the interior of the first support rod and the interior of the handle, and then passes through another third fixed pulley and another fourth fixed pulley in sequence before extending to the exterior of the handle;

[0054] There are multiple second follower ropes; at least one second follower rope has its two ends fixedly connected to two of the first follower ropes, and its middle part fixedly connected to one of the second drive ropes near the first ablation electrode ring, and abuts against the side of the second ablation electrode ring near the first ablation electrode ring; at least one second follower rope has its two ends fixedly connected to the other two first follower ropes, and its middle part fixedly connected to the other second drive rope near the first ablation electrode ring, and abuts against the side of the second ablation electrode ring near the first ablation electrode ring.

[0055] By employing the above technical solution, the operator's hands simultaneously pull two second drive ropes, causing the corresponding second follower ropes to move axially along the second support rod. This, in turn, causes the first and second ablation electrode rings to move axially along the second support rod, adjusting the distance between the surfaces of the first and second ablation electrode rings. The flexible transmission method significantly reduces the weight and inertia of the transmission components, resulting in higher movement speed and flexibility for the first and second ablation electrode rings. It also allows for power transmission around obstacles in narrow or non-linear transmission paths. Long-distance, high-efficiency transmission is achieved, with lower maintenance costs.

[0056] This application further includes:

[0057] The protective sleeve is installed at the end of the second support rod away from the first support rod.

[0058] By adopting the above technical solution, the protective cylinder can isolate the rotating shaft, rotating block, worm gear, worm, rope pulley, first fixed pulley and second fixed pulley from the outside, reduce external interference with its movement, and at the same time, prevent its movement from causing damage to normal tissues.

[0059] This application further includes:

[0060] The terminals are installed inside the handle and are connected to the first ablation electrode ring and the second ablation electrode ring, respectively.

[0061] By adopting the above technical solution, it is easy to electrically connect the ablation electrode ring with the pulse electric field ablation device / pulse power supply.

[0062] In summary, the beneficial technical effects of this application are as follows:

[0063] 1. During pulsed ablation surgery, a stable circular pulsed electric field is constructed using the first and second annular ablation electrode rings, replacing the traditional unidirectional strip-shaped pulsed electric field. This eliminates the need for frequent rotation of the pulsed ablation device, improving surgical flexibility. On one hand, the first support rod can move along its own axis, driving the second support rod, the first ablation electrode ring, and the second ablation electrode ring to move along the first support rod's axis. This allows for adjustment of the pulsed electric field's formation position, further enhancing surgical flexibility. On the other hand, the first support rod can undergo plastic deformation, enabling the first and second ablation electrode rings to move synchronously and rotate at multiple angles to adapt to different tissue orientations. This ensures that each ablation electrode ring remains tightly attached to the tissue, guaranteeing efficient energy transfer and improving surgical flexibility. For patients with anatomical variations or undergoing secondary surgery, the first and second ablation electrode rings can smoothly reach the target ablation area without needing to change instruments or create larger wounds, reducing the risk of infection. Since there is no need to repeatedly adjust the overall angle of the pulse ablation device, thus avoiding interference with established anatomical landmarks, the accuracy of the operation is improved.

[0064] 2. By setting an axial position adjustment mechanism, the axial position adjustment mechanism can drive the first support rod to move along its own axis, thereby driving the second support rod, the first ablation electrode ring and the second ablation electrode ring to move along the axial direction of the first support rod, so as to adjust the position of the first ablation electrode ring and the second ablation electrode ring in the axial direction of the handle, so that the position of the pulse electric field can be adjusted, further improving the flexibility of the surgery.

[0065] 3. By setting up a tilt angle adjustment mechanism, the tilt angle of the surfaces where the first ablation electrode ring and the second ablation electrode ring are located can be adjusted, so that the position of the pulse electric field can be adjusted to adapt to the more complex orientation of the tissue to be ablated.

[0066] 4. By setting an axial spacing adjustment mechanism, the axial spacing adjustment mechanism can adjust the spacing between the surfaces where the first ablation electrode ring and the second ablation electrode ring are located, so that the intensity of the pulse electric field can be adjusted to adapt to tissues of different thicknesses to be ablated. Attached Figure Description

[0067] Figure 1 This is a schematic diagram of the internal structure of an embodiment of a pulse ablation device;

[0068] Figure 2 This is a schematic diagram of another embodiment of the pulse ablation device;

[0069] Figure 3 yes Figure 2 The diagram shown is a structural schematic of the pulse ablation device in use.

[0070] Figure 4 This is a schematic diagram of the pulsed electric field formed by the first and second ablation electrode rings;

[0071] Figure 5 yes Figure 2 The diagram shows the internal structure of the pulse ablation device.

[0072] Figure 6 yes Figure 5 A magnified view of a portion of region A in the middle;

[0073] Figure 7 yes Figure 2 The image shows a front view of the pulse ablation device.

[0074] Figure 8 yes Figure 7 The pulse ablation device shown is a cross-sectional view along BB.

[0075] Figure 9 yes Figure 7 The diagram shows the structure of the second locking element in the pulse ablation device.

[0076] Figure 10 yes Figure 2 A top view of the pulse ablation device shown;

[0077] Figure 11 yes Figure 10 The pulse ablation device shown is a cross-sectional view along CC.

[0078] Figure 12 yes Figure 5 The diagram shows the combined structure of the first follower rope, the second drive rope, and the second follower rope in the pulse ablation device.

[0079] Figure 13 This is a schematic diagram of another embodiment of the pulse ablation device.

[0080] Reference numerals: 110, handle; 111, limiting groove; 120, first support rod; 121, protective sleeve; 130, second support rod; 140, first ablation electrode ring; 150, second ablation electrode ring; 160, axial position adjustment mechanism; 161, sliding ring; 162, first locking element; 163, follower ring; 164, positioning ring; 165, constraint block; 170, tilt angle adjustment mechanism; 171, first support ring; 172, second support ring; 1731, first airbag; 1732, second airbag; 1733, third airbag; 174, rotating shaft; 175, rotating block; 176, first follower ring. 177. Rope; 1781. Worm gear; 1782. Rope pulley; 1791. First drive rope; 1792. Second locking element; 17921. Clamp; 17922. U-bolt; 17923. Locking nut; 180. Axial spacing adjustment mechanism; 181. First fixed pulley; 182. Second fixed pulley; 183. Third fixed pulley; 184. Fourth fixed pulley; 185. Second drive rope; 186. Second follower rope; 187. Third locking element; 188. Adjustment knob; 1881. Take-up groove; 1891. Reversing rod; 1892. Third drive rope; 191. Protective cylinder; 192. Terminal block. Detailed Implementation

[0081] The following is in conjunction with the appendix Figure 1-13 This application will be described in further detail.

[0082] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 This application discloses a pulse ablation device, including a handle 110, a first support rod 120, a second support rod 130, a first ablation electrode ring 140, and a second ablation electrode ring 150. The handle 110 is for the operator to grip. One end of the first support rod 120 is slidably mounted inside the handle 110 and is capable of plastic deformation. The second support rod 130 is mounted on the end of the handle 110 away from the first support rod 120 and can move with the first support rod 120, but cannot undergo plastic deformation. The first ablation electrode ring 140 is sleeved on the outer wall of the second support rod 130. The second ablation electrode ring 150 is sleeved on the outer wall of the second support rod 130, forming an ablation gap with the first ablation electrode ring 140. The first ablation electrode ring 140 and the second ablation electrode ring 150 are electrically connected to a pulse electric field ablation device / pulse power supply via corresponding cables. A high-voltage electric pulse is provided by a pulsed electric field ablation device / pulse power supply, which acts on the tissue to be ablated through the ablation electrode, causing necrosis of the tissue. Compared with existing pulsed ablation devices, during pulsed ablation surgery, if... Figure 4As shown, a circular pulsed electric field is constructed using the annular first ablation electrode ring 140 and the second ablation electrode ring 150, replacing the traditional unidirectional strip-shaped pulsed electric field. This eliminates the need for frequent rotation of the pulsed ablation device, improving surgical flexibility. On one hand, the first support rod 120 can be moved along its own axis, thereby moving the second support rod 130, the first ablation electrode ring 140, and the second ablation electrode ring 150 along the axis of the first support rod 120. This allows the position of the pulsed electric field to be adjusted, further improving surgical flexibility. On the other hand, as... Figure 3 As shown, the first support rod 120 can undergo plastic deformation, allowing the first ablation electrode ring 140 and the second ablation electrode ring 150 to move synchronously and rotate synchronously at multiple angles, adapting to the tissue orientation of different locations. This ensures that each ablation electrode ring remains tightly attached to the tissue, guaranteeing efficient energy transfer and improving surgical flexibility. For patients with anatomical variations (such as transposition of the heart or vascular malformations) or undergoing secondary surgery, the first and second ablation electrode rings 140 and 150 can smoothly reach the target ablation area without the need to change instruments or create larger wounds, reducing the risk of infection. Since there is no need to repeatedly adjust the overall angle of the pulse ablation device, interference with established anatomical landmarks is avoided, improving operational precision.

[0083] Preferably, the handle 110 and the second support rod 130 are cylindrical and made of rigid materials such as plastic, which cannot undergo plastic deformation.

[0084] Preferably, the first support rod 120 is cylindrical and can be made of metals such as gold, silver, copper or iron, or it can be made of a plastic polymer that can produce plastic deformation.

[0085] Preferably, the first ablation electrode ring 140 and the second ablation electrode ring 150 can be a single unit. Alternatively, there can be two or more first ablation electrode rings 140 and second ablation electrode rings 150, alternately arranged along the axial direction of the second support rod 130. This allows for simultaneous pulsed ablation surgery at multiple positions along the axial direction.

[0086] It should be noted that when the first ablation electrode ring 140 is the positive electrode ring, the second ablation electrode ring 150 is the negative electrode ring. Conversely, when the second ablation electrode ring 150 is the positive electrode ring, the first ablation electrode ring 140 is the negative electrode ring.

[0087] Reference Figure 1In one embodiment, the pulse ablation device further includes an axial position adjustment mechanism 160. The axial position adjustment mechanism 160 is mounted on the handle 110 and connected to the first support rod 120. It drives the first support rod 120 to move axially, thereby causing the second support rod 130, the first ablation electrode ring 140, and the second ablation electrode ring 150 to move axially along the first support rod 120. This achieves the purpose of adjusting the axial position of the first ablation electrode ring 140 and the second ablation electrode ring 150 on the handle 110, allowing the pulse electric field formation position to be adjusted. Specifically, a limiting groove 111 is formed on the outer wall of the handle 110 near the second support rod 130. The axial position adjustment mechanism 160 includes a sliding ring 161, a first locking member 162, a follower ring 163, a positioning ring 164, and a constraint block 165. The sliding ring 161 is slidably sleeved on the outer wall of the handle 110. The first locking element 162 is mounted on the sliding ring 161 and can cooperate with the limiting groove 111 to restrict the movement of the sliding ring 161 or release the restriction on the sliding ring 161. The follower ring 163 is slidably mounted in the handle 110 and sleeved on the end of the first support rod 120 away from the second support rod 130. The follower ring 163 is fixedly connected to the sliding ring 161 and can move with the sliding ring 161 to drive the first support rod 120, the second support rod 130, the first ablation electrode ring 140 and the second ablation electrode ring 150 to move. When the first locking element 162 releases the restriction on the sliding ring 161, the operator's hand can drive the sliding ring 161 to slide along the axial direction of the handle 110, thereby driving the follower ring 163 to slide along the axial direction of the handle 110, and further driving the first support rod 120, the second support rod 130, the first ablation electrode ring 140 and the second ablation electrode ring 150 to move along the axial direction of the handle 110. After the first ablation electrode ring 140 and the second ablation electrode ring 150 are moved into place, the first locking member 162 engages with the limiting groove 111 to restrict the movement of the sliding ring 161. A positioning ring 164 is fixedly installed inside the handle 110, with a positioning hole formed in its center. The positioning hole matches the end of the first support rod 120 to facilitate the positioning and installation of the first support rod 120. A constraint block 165 is fixedly installed at the end of the handle 110 near the second support rod 130, with a clearance hole formed in its center for the first support rod 120 to pass through. The constraint block 165 can constrain the movement direction of the first support rod 120, serving as a guide. Simultaneously, it increases the strength of the connection between the first support rod 120 and the handle 110.

[0088] Preferably, there are multiple limiting grooves 111, all of which are annular and distributed along the axial direction of the handle 110, which can adjust the length of the first support rod 120 extending out of the handle 110 as needed.

[0089] Preferably, the first locking member 162 is a locking pin, which is rotatably mounted on the sliding ring 161 and can be inserted into or disengaged from the limiting groove 111 on the outer wall of the handle 110 to restrict the movement of the sliding ring 161 or release the restriction on the sliding ring 161.

[0090] Preferably, the cross-sectional dimension of the constraint block 165 at the end near the handle 110 is larger than the cross-sectional dimension at the end away from the handle 110, thus providing better guidance.

[0091] Preferably, such as Figure 1 As shown, the pulse ablation device also includes a protective sleeve 121, which is sleeved on the outside of the first support rod 120 to isolate the first support rod 120 from the outside and protect the first support rod 120.

[0092] Reference Figure 2 and Figure 5 In one embodiment, the pulse ablation device further includes a tilt angle adjustment mechanism 170. The tilt angle adjustment mechanism 170 is mounted on the handle 110, the first support rod 120, and the second support rod 130, and is connected to the first ablation electrode ring 140 and the second ablation electrode ring 150, respectively. It is used to adjust the tilt angle of the surfaces containing the first and second ablation electrode rings 140 and 150, thereby adjusting the position where the pulse electric field is formed. It should be noted that, initially, the axes of the first and second ablation electrode rings 140 and 150 are collinear with the axis of the second support rod 130. When the first support rod 120 undergoes plastic deformation, the axes of the first and second ablation electrode rings 140 and 150 remain collinear with the axis of the second support rod 130. The tilt angle adjustment mechanism 170 is then used to swing the planes where the first ablation electrode ring 140 and the second ablation electrode ring 150 are located, so that the axis of the first ablation electrode ring 140 / second ablation electrode ring 150 is no longer on the same straight line as the axis of the second support rod 130. At this time, the angle between the planes where the first ablation electrode ring 140 / second ablation electrode ring 150 are located and the axis of the second support rod 130 is 45°-135°, in order to adapt to the more complex orientation of the tissue to be ablated, ensure that the ablation energy can be transmitted efficiently, and further improve the flexibility of the operation.

[0093] Reference Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9In one embodiment, the tilt angle adjustment mechanism 170 includes a first support ring 171, a second support ring 172, a first airbag 1731, a second airbag 1732, a third airbag 1733, a rotating shaft 174, two rotating blocks 175, four first follower ropes 176, a worm gear 177, a worm 1781, a rope wheel 1782, a first drive rope 1791, and a second locking member 1792. The first support ring 171 is sleeved on the outer wall of the second support rod 130 near the end of the first support rod 120 and cannot move relative to the second support rod 130. The second support ring 172 is sleeved on the outer wall of the second support rod 130 away from the end of the first support rod 120 and cannot move relative to the second support rod 130. The first airbag 1731 is sleeved on the end of the second support rod 130 near the first support rod 120, with one end face fixedly connected to one end face of the first support ring 171, and the other end face fixedly connected to the end face of the first ablation electrode ring 140 away from the second ablation electrode ring 150. The second airbag 1732 is sleeved on the middle of the second support rod 130, with one end face fixedly connected to the end face of the first ablation electrode ring 140 near the second ablation electrode ring 150, and the other end face fixedly connected to the end face of the second ablation electrode ring 150 near the first ablation electrode ring 140. The third airbag 1733 is sleeved on the end of the second support rod 130 near the first support rod 120, with one end face fixedly connected to the end face of the second ablation electrode ring 150 away from the first ablation electrode ring 140, and the other end face fixedly connected to the end face of the second support ring 172. The axial direction of the rotating shaft 174 is perpendicular to the axial direction of the second support rod 130, and it is rotatably mounted on the end of the second support rod 130 away from the first support rod 120. Two rotating blocks 175 are respectively sleeved on opposite ends of the rotating shaft 174, and can rotate with the rotating shaft 174. One end of each of the two first follower ropes 176 is fixedly connected to opposite sides of one of the rotating blocks 175, and the other end is fixedly connected to one side of the first ablation electrode ring 140 and one side of the second ablation electrode ring 150, respectively. One end of each of the other two first follower ropes 176 is fixedly connected to opposite sides of the other rotating block 175, and the other end is fixedly connected to the other side of the first ablation electrode ring 140 and the other side of the second ablation electrode ring 150, respectively. A worm gear 177 is sleeved on the middle of the rotating shaft 174. A worm 1781 is rotatably mounted on the end of the second support rod 130 away from the first support rod 120, and its sidewall meshes with the sidewall of the worm gear 177. The pulley 1782 is rotatably mounted on the end of the second support rod 130 away from the first support rod 120, and its middle part is fixedly connected to one end of the worm gear 1781. The first drive rope 1791 is wound on the pulley, and its two ends pass through the interior of the second support rod 130, the interior of the first support rod 120, and the interior of the handle 110, respectively, and extend to the outside of the handle 110.The first support ring 171 and the second support ring 172 provide rigid support, while the first airbag 1731, the second airbag 1732, and the third airbag 1733 provide flexible support. The operator's hand can drive one end of the first drive rope 1791 away from the handle 110, causing the other end of the first drive rope 1791 to move towards the handle 110. During this process, the rope wheel 1782 rotates clockwise or counterclockwise by a certain angle, thereby driving the worm gear 1781 to rotate clockwise or counterclockwise by a certain angle. This, in turn, causes the worm wheel 177, the rotating shaft 174, and the two rotating blocks 175 to rotate clockwise or counterclockwise by a certain angle. This, in turn, causes the first ablation electrode ring 140 and the second ablation electrode ring 150 to tilt via the first follower rope 176, so that the axes of the first ablation electrode ring 140 and the second ablation electrode ring 150 are no longer aligned with the axis of the second support rod 130. Overall, the flexible transmission method significantly reduces the weight and inertia of the transmission components, resulting in higher movement speed and flexibility for the first ablation electrode ring 140 and the second ablation electrode ring 150. It also enables power transmission around obstacles in narrow or non-linear transmission paths. This allows for long-distance, high-efficiency transmission with lower maintenance costs. The second locking element 1792 is located at the end of the handle 110 away from the first support rod 120, used to restrict the movement of the first drive rope 1791 or release the restriction on the first drive rope 1791.

[0094] It should be noted that when there is only one first ablation electrode ring 140 and one second ablation electrode ring 150, there is only one second airbag 1732. When there are two first ablation electrode rings 140 and two second ablation electrode rings 150, there are three second airbags 1732.

[0095] Preferably, the first airbag 1731, the second airbag 1732 and the third airbag 1733 contain a gaseous medium or a liquid medium.

[0096] Preferably, such as Figure 9 As shown, the second locking member 1792 includes a clamp 17921, a U-bolt 17922, and a locking nut 17923. The clamp 17921 abuts against the end of the handle 110 away from the first support rod 120. The U-bolt 17922 and the locking nut 17923 cooperate to clamp or release the opposite ends of the first drive rope 1791, thereby restricting the movement of the first drive rope 1791 or releasing the restriction on the first drive rope 1791.

[0097] Reference Figure 5 and Figure 6In one embodiment, the pulse ablation device further includes an axial spacing adjustment mechanism 180. The axial spacing adjustment mechanism 180 is mounted on the handle 110, the first support rod 120, and the second support rod 130, and is connected to the first ablation electrode ring 140 and the second ablation electrode ring 150, respectively, for adjusting the spacing between the surfaces of the first ablation electrode ring 140 and the second ablation electrode ring 150. It should be noted that initially, the spacing between the first ablation electrode ring 140 and the second ablation electrode ring 150 is a fixed value. When the first support rod 120 undergoes plastic deformation, the spacing between the first ablation electrode ring 140 and the second ablation electrode ring 150 remains a fixed value. By using the axial spacing adjustment mechanism 180 to adjust the spacing between the surfaces of the first ablation electrode ring 140 and the second ablation electrode ring 150, the intensity of the pulse electric field can be adjusted to accommodate tissues of different thicknesses to be ablated, ensuring efficient transmission of ablation energy and further improving the flexibility of the procedure.

[0098] Reference Figure 5 , Figure 6 , Figure 10 , Figure 11 and Figure 12The axial spacing adjustment mechanism 180 includes two first fixed pulleys 181, two second fixed pulleys 182, two third fixed pulleys 183, two fourth fixed pulleys 184, two second drive ropes 185, and multiple second follower ropes 186. The two first fixed pulleys 181 are rotatably mounted on opposite sides of the end of the second support rod 130 away from the first support rod 120. The two second fixed pulleys 182 are rotatably mounted at the middle of the end of the second support rod 130 away from the first support rod 120. The two third fixed pulleys 183 are rotatably mounted inside the end of the handle 110 near the first support rod 120. The two fourth fixed pulleys 184 are rotatably mounted on opposite sides of the inside of the end of the handle 110 near the first support rod 120. The first fixed pulleys 181, second fixed pulleys 182, third fixed pulleys 183, and fourth fixed pulleys 184 cooperate to change the direction of movement of the second drive ropes 185. It should be noted that a clearance hole should be provided on the second ablation electrode ring 150 for the second drive rope 185 to pass through. One end of one of the second drive ropes 185 is fixedly connected to one side of the first ablation electrode ring 140, and the other end passes through one of the first fixed pulleys 181 and one of the second fixed pulleys 182 in sequence, and then passes through the interior of the second support rod 130, the interior of the first support rod 120, and the interior of the handle 110. It then passes through one of the third fixed pulleys 183 and one of the fourth fixed pulleys 184 in sequence and extends to the outside of the handle 110. One end of the other second drive rope 185 is fixedly connected to the other side of the first ablation electrode ring 140, and the other end passes through another first fixed pulley 181 and another second fixed pulley 182 in sequence, and then passes through the interior of the second support rod 130, the interior of the first support rod 120, and the interior of the handle 110. It then passes through another third fixed pulley 183 and another fourth fixed pulley 184 in sequence and extends to the outside of the handle 110. Figure 12As shown, at least one second follower rope 186 has its opposite ends fixedly connected to two of the first follower ropes 176, and its middle portion fixedly connected to one of the second drive ropes 185 near the end of the first ablation electrode ring 140, abutting against the side of the second ablation electrode ring 150 near the first ablation electrode ring 140. At least one second follower rope 186 has its opposite ends fixedly connected to two other first follower ropes 176, and its middle portion fixedly connected to the other second drive rope 185 near the end of the first ablation electrode ring 140, abutting against the side of the second ablation electrode ring 150 near the first ablation electrode ring 140. The operator's hand simultaneously pulls two second drive ropes 185 to move the corresponding second follower rope 186 along the axial direction of the second support rod 130, thereby moving the first ablation electrode ring 140 and the second ablation electrode ring 150 along the axial direction of the second support rod 130 to adjust the distance between the surfaces of the first ablation electrode ring 140 and the second ablation electrode ring 150. Overall, the flexible transmission method significantly reduces the weight and inertia of the transmission components, resulting in higher movement speed and flexibility for the first ablation electrode ring 140 and the second ablation electrode ring 150. It also enables power transmission around obstacles in narrow or non-linear transmission paths. This allows for long-distance, high-efficiency transmission with lower maintenance costs.

[0099] It should be noted that the first airbag 1731, the second airbag 1732, and the third airbag 1733 can isolate the first follower rope 176, the second follower rope 186, and the second drive rope 185 from the outside, reducing external interference with the movement of the first follower rope 176, the second follower rope 186, and the second drive rope 185. At the same time, it prevents the moving first follower rope 176, the second follower rope 186, and the second drive rope 185 from causing damage to normal tissues.

[0100] Preferably, such as Figure 7 As shown, the axial spacing adjustment mechanism 180 also includes two third locking elements 187. The two third locking elements 187 are respectively installed at the end of the handle 110 away from the first support rod 120, and are used to restrict the movement of the corresponding second drive rope 185 or release the restriction on the corresponding second drive rope 185.

[0101] Preferably, each third locking element 187 is a locking post that can be bound by a corresponding second drive rope 185.

[0102] Preferably, a bushing is installed at the middle of the end of the second support rod 130 away from the first support rod 120 for the first drive rope 1791 and the second drive rope 185 to pass through, so as to reduce the wear of the second support rod 130 on the first drive rope 1791 and the second drive rope 185.

[0103] like Figure 13As shown, preferably, the axial spacing adjustment mechanism 180 further includes an adjustment knob 188, a reversing lever 1891, and a third drive rope 1892. The adjustment knob 188 is rotatably mounted on the end of the handle 110 near the first support rod 120. A take-up groove 1881 is formed on the outer wall of the adjustment knob 188. The reversing lever 1891 is fixed to the outer wall of the end of the handle 110 near the first support rod 120. One end of the third drive rope 1892 is fixedly connected to one end of each of the two second drive ropes 185 extending out of the handle 110, and the other end passes around the reversing lever 1891 and is fixed to the take-up groove 1881. The same hand can both hold the handle 110 and drive the adjustment knob 188 to rotate, so that the third drive rope 1892 gradually winds into the take-up groove 1881 or gradually releases the third drive rope 1892, thereby driving the two second drive ropes 185 to move synchronously. In this way, it is possible to operate the two second drive ropes 185 with one hand.

[0104] Reference Figure 2 In one embodiment, the pulse ablation device further includes a protective sleeve 191. The protective sleeve 191 is fixedly installed at the end of the second support rod 130 away from the first support rod 120. Its inner walls on both sides are rotatably connected to opposite ends of the rotating shaft 174 via bearings, and its inner walls on the other two sides are rotatably connected to the worm gear 1781 and the rope pulley 1782 via bearings. The protective sleeve 191 isolates the rotating shaft 174, rotating block 175, worm gear 177, worm gear 1781, rope pulley 1782, first fixed pulley 181, and second fixed pulley 182 from the outside, reducing external interference with their movement and preventing damage to normal tissues.

[0105] Reference Figure 1 The pulse ablation device also includes a terminal block 192. The terminal block 192 is fixedly installed inside the handle 110 and is electrically connected to the first ablation electrode ring 140 and the second ablation electrode ring 150, respectively. The terminal block 192 can be electrically connected to the pulse electric field ablation device / pulse power supply, so as to facilitate the electrical connection between the ablation electrode ring and the pulse electric field ablation device / pulse power supply.

[0106] The implementation principle of this embodiment is as follows: The handle 110 is for the surgeon to grip. The first ablation electrode ring 140 and the second ablation electrode ring 150 are electrically connected to the pulse electric field ablation device / pulse power supply through corresponding cables. The pulse electric field ablation device / pulse power supply provides high-voltage electric pulses, which are applied to the tissue to be ablated through the ablation electrodes, causing the tissue to necrose. Compared with existing pulse ablation devices, during pulse ablation surgery, the circular first ablation electrode ring 140 and the second ablation electrode ring 150 construct a circular pulse electric field, replacing the traditional unidirectional strip pulse electric field. This eliminates the need for frequent rotation of the pulse ablation device, improving the flexibility of the surgery. On the one hand, the first support rod 120 can be moved along its own axis to drive the second support rod 130, the first ablation electrode ring 140, and the second ablation electrode ring 150 to move along the axis of the first support rod 120, further improving the flexibility of the surgery. On the other hand, the first support rod 120 can undergo plastic deformation, allowing the first ablation electrode ring 140 and the second ablation electrode ring 150 to move synchronously and rotate synchronously at multiple angles, adapting to the tissue orientation of different locations. This ensures that each ablation electrode ring remains tightly attached to the tissue, guaranteeing the efficiency of ablation energy transfer and improving surgical flexibility. For patients with anatomical variations or undergoing secondary surgery, the first and second ablation electrode rings 140 and 150 can smoothly reach the target ablation area without the need to change instruments or create larger wounds, reducing the risk of infection. Since there is no need to repeatedly adjust the overall angle of the pulse ablation device, interference with established anatomical landmarks is avoided, improving operational precision.

[0107] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A pulse ablation device, characterized in that, include: Handle (110); The first support rod (120) is slidably installed at one end in the handle (110) and is capable of plastic deformation; The second support rod (130) is installed at the end of the handle (110) away from the first support rod (120); The first ablation electrode ring (140) is sleeved on the outer wall of the second support rod (130); The second ablation electrode ring (150) is sleeved on the outer wall of the second support rod (130) and forms an ablation gap with the first ablation electrode ring (140); A tilt angle adjustment mechanism (170) is installed on the handle (110), the first support rod (120) and the second support rod (130), and is connected to the first ablation electrode ring (140) and the second ablation electrode ring (150) respectively, for adjusting the tilt angle of the first ablation electrode ring (140) and the second ablation electrode ring (150); The tilt angle adjustment mechanism (170) includes: The first support ring (171) is sleeved on the outer wall of the second support rod (130) near the end of the first support rod (120); The second support ring (172) is sleeved on the outer wall of the end of the second support rod (130) away from the first support rod (120); The first airbag (1731) is sleeved on the end of the second support rod (130) near the first support rod (120), with one end face fixedly connected to one end face of the first support ring (171), and the other end face fixedly connected to the end face of the first ablation electrode ring (140) away from the second ablation electrode ring (150). The second airbag (1732) is sleeved on the middle part of the second support rod (130), with one end face fixedly connected to the end face of the first ablation electrode ring (140) near the second ablation electrode ring (150), and the other end face fixedly connected to the end face of the second ablation electrode ring (150) near the first ablation electrode ring (140). The third airbag (1733) is sleeved on the end of the second support rod (130) near the first support rod (120), with one end face fixedly connected to the end face of the second ablation electrode ring (150) away from the first ablation electrode ring (140), and the other end face fixedly connected to the end face of the second support ring (172). A rotating shaft (174), whose axial direction is perpendicular to the axial direction of the second support rod (130), is rotatably mounted on the end of the second support rod (130) away from the first support rod (120); There are two rotating blocks (175), which are respectively sleeved on the opposite ends of the rotating shaft (174) and can rotate with the rotating shaft (174); There are four first follower ropes (176); one end of two of the first follower ropes (176) is fixedly connected to the opposite sides of one of the rotating blocks (175), and the other end is fixedly connected to one side of the first ablation electrode ring (140) and one side of the second ablation electrode ring (150), respectively; one end of the other two first follower ropes (176) is fixedly connected to the opposite sides of the other rotating block (175), and the other end is fixedly connected to the other side of the first ablation electrode ring (140) and the other side of the second ablation electrode ring (150), respectively.

2. The pulse ablation device according to claim 1, characterized in that, Also includes: An axial position adjustment mechanism (160) is mounted on the handle (110) and connected to the first support rod (120). It is used to drive the first support rod (120) to move along its own axial direction, so as to drive the second support rod (130), the first ablation electrode ring (140) and the second ablation electrode ring (150) to move.

3. The pulse ablation device according to claim 2, characterized in that, A limiting groove (111) is formed on the outer wall of the end of the handle (110) near the second support rod (130); The axial position adjustment mechanism (160) includes: A sliding ring (161) is slidably fitted onto the outer wall of the handle (110); The first locking member (162) is installed on the sliding ring (161) and can cooperate with the limiting groove (111) to restrict the movement of the sliding ring (161) or release the restriction on the sliding ring (161); The follower ring (163) is slidably installed inside the handle (110) and sleeved on the end of the first support rod (120) away from the second support rod (130); the follower ring (163) is fixedly connected to the sliding ring (161) and can move with the sliding ring (161) to drive the first support rod (120), the second support rod (130), the first ablation electrode ring (140) and the second ablation electrode ring (150) to move.

4. The pulse ablation device according to claim 3, characterized in that, The axial position adjustment mechanism (160) further includes: A positioning ring (164) is installed inside the handle (110) and has a positioning hole in the middle; the positioning hole matches the end of the first support rod (120); A constraint block (165) is installed at one end of the handle (110) near the second support rod (130), and a clearance hole is formed in the middle for the first support rod (120) to pass through.

5. The pulse ablation device according to claim 1, characterized in that, The tilt angle adjustment mechanism (170) also includes: A worm gear (177) is fitted into the middle of the rotating shaft (174); The worm (1781) is rotatably mounted on the end of the second support rod (130) away from the first support rod (120), and its sidewall is meshed with the sidewall of the worm wheel (177). A pulley (1782) is rotatably mounted on one end of the second support rod (130) away from the first support rod (120), and its middle part is fixedly connected to one end of the worm gear (1781); The first drive rope (1791) is wound around the rope wheel, and its two ends pass through the interior of the second support rod (130), the interior of the first support rod (120), and the interior of the handle (110) respectively, extending to the exterior of the handle (110); The second locking element (1792) is disposed at the end of the handle (110) away from the first support rod (120) for restricting the movement of the first drive rope (1791) or releasing the restriction on the first drive rope (1791).

6. The pulse ablation device according to claim 5, characterized in that, Also includes: An axial spacing adjustment mechanism (180) is installed on the handle (110), the first support rod (120) and the second support rod (130), and is connected to the first ablation electrode ring (140) and the second ablation electrode ring (150) respectively, for adjusting the spacing between the first ablation electrode ring (140) and the second ablation electrode ring (150).

7. The pulse ablation device according to claim 6, characterized in that, The axial spacing adjustment mechanism (180) includes: There are two first fixed pulleys (181), which are rotatably mounted on opposite sides of the end of the second support rod (130) away from the first support rod (120); There are two second fixed pulleys (182), which are rotatably mounted on the middle of the end of the second support rod (130) away from the first support rod (120); There are two third fixed pulleys (183), which are rotatably installed inside the handle (110) near the first support rod (120); The fourth fixed pulley (184) consists of two pulleys, which are rotatably mounted on opposite sides of the inside of the handle (110) near the first support rod (120); There are two second drive ropes (185); one end of one of the second drive ropes (185) is fixedly connected to one side of the first ablation electrode ring (140), and the other end passes through one of the first fixed pulleys (181) and one of the second fixed pulleys (182) in sequence, and then passes through the interior of the second support rod (130), the interior of the first support rod (120), and the interior of the handle (110), and then passes through one of the third fixed pulleys (183) and one of the fourth fixed pulleys (184) in sequence and extends to the handle (110). 10) outside; one end of another second drive rope (185) is fixedly connected to the other side of the first ablation electrode ring (140), and the other end passes through another first fixed pulley (181) and another second fixed pulley (182) in sequence and then passes through the interior of the second support rod (130), the interior of the first support rod (120) and the interior of the handle (110), and then passes through another third fixed pulley (183) and another fourth fixed pulley (184) in sequence and extends to the outside of the handle (110); There are multiple second follower ropes (186); at least one second follower rope (186) has its two ends fixedly connected to two of the first follower ropes (176), and its middle part is fixedly connected to one of the second drive ropes (185) near the end of the first ablation electrode ring (140), and abuts against the side of the second ablation electrode ring (150) near the first ablation electrode ring (140); at least one second follower rope (186) has its two ends fixedly connected to two other first follower ropes (176), and its middle part is fixedly connected to one other second drive rope (185) near the end of the first ablation electrode ring (140), and abuts against the side of the second ablation electrode ring (150) near the first ablation electrode ring (140).

8. The pulse ablation device according to any one of claims 1 to 7, characterized in that, Also includes: The protective sleeve (191) is installed at the end of the second support rod (130) away from the first support rod (120).

9. The pulse ablation device according to any one of claims 1 to 7, characterized in that, Also includes: The terminal block (192) is installed inside the handle (110) and is connected to the first ablation electrode ring (140) and the second ablation electrode ring (150) respectively.

Images