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CN-121987330-A - Pulsed electric field ablation device

CN121987330ACN 121987330 ACN121987330 ACN 121987330ACN-121987330-A

Abstract

The application relates to the technical field of medical appliances, in particular to a pulse electric field ablation device which comprises a handle, a supporting rod, a supporting shell, a plurality of first ablation electrodes, a plurality of second ablation electrodes, a wiring terminal and a shielding mechanism, wherein the shielding mechanism can operate in the process of performing pulse electric field ablation operation, so that a single or a plurality of ablation electrode groups needing to participate in an ablation task are exposed outside, the ablation electrode groups needing to participate in the ablation task are shielded, the ablation electrode groups needing to participate in the ablation task are effectively blocked by the shielding mechanism, the ablation electrode groups needing to do not work and tissues needing to be ablated are effectively blocked, and the occurrence of a false ablation phenomenon is avoided. Because the ablation electrode group which does not need to work is shielded, the interference of the ablation electrode group does not need to be avoided when the target area is accurately positioned, the operation difficulty of an operator is effectively reduced, and the operation time is shortened. The shielding mechanism effectively prevents blood residues or tissue scraps from adhering to the surface of the ablation electrode group which does not participate in the work, and ensures the conductive performance and the ablation effect in the subsequent work.

Inventors

  • WANG RUIXING
  • HUANG JIAN
  • HU CONG
  • KONG TAI

Assignees

  • 北京搏芯医疗科技有限公司

Dates

Publication Date
20260508
Application Date
20260317

Claims (9)

  1. 1. A pulsed electric field ablation device, comprising: A handle (110); a support rod (120), one end of which is fixedly connected with the handle (110); A support case (130), one end of which is fixedly connected with the other end of the support bar (120); A plurality of first ablation electrodes (140) mounted on the top end of the support case (130) along the length direction of the support case (130); The plurality of second ablation electrodes (150) are arranged at the top end of the supporting shell (130) along the length direction of the supporting shell (130) and are in one-to-one correspondence with the plurality of first ablation electrodes (140); the connecting terminals are arranged in the handle (110) and are respectively connected with each first ablation electrode (140) and each second ablation electrode (150); A shielding mechanism (160) is operatively mounted to the support housing (130) for shielding one or more of the first ablation electrodes (140) and one or more of the second ablation electrodes (150) or exposing a plurality of the first ablation electrodes (140) and a plurality of the second ablation electrodes (150).
  2. 2. The pulsed electric field ablation device of claim 1, wherein the shielding mechanism (160) comprises: the isolation frame (161) is fixed at the top end of the supporting shell (130) and is surrounded outside the plurality of first ablation electrodes (140) and the plurality of second ablation electrodes (150); A shielding member (162) reciprocally slidably mounted on the top end of the isolation frame (161) to shield one or more of the first ablation electrodes (140) and one or more of the second ablation electrodes (150) or to expose a plurality of the first ablation electrodes (140) and a plurality of the second ablation electrodes (150); and the driving assembly (163) is connected with the shielding assembly and is used for driving the shielding assembly (162) to move.
  3. 3. The pulsed electric field ablation device of claim 2, wherein the drive assembly (163) comprises: a moving plate (1631) fixed at the bottom end of the shielding component (162), and a guide hole is formed in the middle part of the moving plate; A connecting shaft (1632) movably installed in the guide hole; The first connecting rod (1633) is obliquely arranged in the supporting shell (130), one end of the first connecting rod is rotationally connected with one end of the connecting shaft (1632), and the other end of the first connecting rod is rotationally connected with the inner wall of the supporting shell (130); a second connecting rod (1634) which is obliquely arranged in the supporting shell (130), and one end of which is rotationally connected with the other end of the connecting shaft (1632); One end of a third connecting rod (1635) is rotationally connected with the other end of the second connecting rod (1634); A driven gear (1636) rotatably installed in the support case (130), the middle part of one end surface being fixedly connected with the other end of the third connecting rod (1635); a driving gear (1637) rotatably installed in the support case (130), and a side wall is engaged with a side wall of the driven gear (1636); The servo motor (1638) is arranged in the supporting shell (130), an output shaft is fixedly connected with the middle part of the driving gear (1637) and used for driving the driving gear (1637) to rotate so as to drive the driven gear (1636) to rotate, and the shielding assembly (162) is driven to move by the connecting shaft (1632) and the moving plate (1631) through the third connecting rod (1635) and the second connecting rod (1634) and the first connecting rod (1633).
  4. 4. The pulsed electric field ablation device of claim 2, wherein the shielding assembly (162) comprises: A first shielding plate (1621) slidably mounted on the top end of the isolation frame (161), and having a receiving chamber formed therein; a second shielding plate (1622) installed in the accommodating chamber and capable of protruding out of the accommodating chamber, wherein a receiving groove is formed at the top, and a first locking groove (16221) is formed at one end of the bottom; A third shielding plate (1623) mounted in the storage groove and capable of protruding from the storage groove, wherein a second locking groove (16231) is formed at one end of the bottom; the two first pushing springs (1624) are provided, one ends of the two first pushing springs are fixedly connected with one end of the first shielding plate (1621) respectively, and the other ends of the two first pushing springs are fixedly connected with the bottom end of the second shielding plate (1622) through first connecting blocks (16241) respectively; the two second pushing springs (1625) are provided, one ends of the two second pushing springs are fixedly connected with one end of the second shielding plate (1622) respectively, and the other ends of the two second pushing springs are fixedly connected with the bottom end of the third shielding plate (1623) through second connecting blocks (16251) respectively; a first locking claw (1626) swingably mounted to one end of the first shielding plate (1621), the claw tip being capable of being inserted into or removed from the first locking groove (16221); The first jacking spring (1627) is vertically arranged, the bottom end of the first jacking spring is fixedly connected with the inner bottom surface of the first shielding plate (1621), and the top end of the first jacking spring is abutted to the bottom end of the first locking claw (1626); A second locking claw (1628) swingably mounted to one end of the second shielding plate (1622), the claw tip being capable of being inserted into or removed from the second locking groove (16231); And the second jacking spring (1629) is vertically arranged, the bottom end of the second jacking spring is fixedly connected with the inner bottom surface of the second shielding plate (1622), and the top end of the second jacking spring is abutted to the bottom end of the second locking claw (1628).
  5. 5. The pulsed electric field ablation device of claim 4, wherein a first oblique guide groove (16222) is formed at one end of a bottom portion of the second shielding plate (1622), the first oblique guide groove (16222) being in communication with the first locking groove (16221); A second inclined guide groove (16232) is formed at one end of the bottom of the third shielding plate (1623), and the second inclined guide groove (16232) is communicated with the second locking groove (16231).
  6. 6. The pulsed electric field ablation device of claim 4, wherein an end of the first locking claw (1626) remote from the first shielding plate (1621) is bent upward to form a first pressed portion (16261); one end of the second locking claw (1628) far away from the second shielding plate (1622) is bent upwards to form a second pressed part (16281).
  7. 7. The pulsed electric field ablation device of claim 6, wherein the shielding mechanism (160) further comprises: When the first locking claw (1626) and the second locking claw (1628) move along with the first shielding plate (1621) towards the triggering assembly (164), the triggering assembly (164) can act on the first pressed part (16261) and/or the second pressed part (16281) to enable the first locking claw (1626) and/or the second locking claw (1628) to swing, and further enable the claw tip of the first locking claw (1626) and/or the second locking claw (1628) to be separated from the first locking groove (16221) and/or the second locking groove (16231); And when the second shielding plate (1622) and the third shielding plate (1623) move along with the first shielding plate (1621) towards the limiting block (165), the limiting block (165) can enable the second shielding plate (1622) to retract into the accommodating cavity and enable the third shielding plate (1623) to retract into the accommodating groove.
  8. 8. The pulsed electric field ablation device of claim 7, wherein the trigger assembly (164) comprises: a fixed block (1641) fixed to one end of the top of the isolation frame (161), wherein a first mounting groove (16411) is formed at the lower part and a second mounting groove (16412) is formed at the upper part; a first carrier rod (1642) axially movably mounted in the first mounting groove (16411); The first electromagnet (1643) is arranged in the first mounting groove (16411) and connected with the wiring terminal, and is used for attracting or releasing the first ejector rod (1642); When the first electromagnet (1643) releases the first ejector rod (1642), the first traction spring (1644) drives the first ejector rod (1642) to move away from the first electromagnet (1643); a second carrier rod (1645) axially movably mounted in the second mounting groove (16412); A second electromagnet (1646) mounted in the second mounting groove (16412) and connected with the wiring terminal for attracting or releasing the second ejector rod (1645); And when the second electromagnet (1646) releases the second ejector rod (1645), the second traction spring (1647) drives the second ejector rod (1645) to move away from the second electromagnet (1646).
  9. 9. The pulsed electric field ablation device of any one of claims 1-8, wherein the support rod (120) is capable of plastic deformation.

Description

Pulsed electric field ablation device Technical Field The application relates to the technical field of medical equipment, in particular to a pulse electric field ablation device. Background The pulsed electric field ablation technology releases intermittent high-intensity pulsed electric fields of microsecond to nanosecond level to enable cell membranes to generate irreversible electroporation and damage intracellular homeostasis, so that apoptosis is caused. Since the electroporation threshold of cardiac cells is lower than that of surrounding tissue, myocardial tissue can be selectively ablated with less damage to surrounding normal tissue. During ablation, a pulsed electric field ablation device is needed. The prior pulsed electric field ablation device comprises a handle, a support rod, a plurality of first ablation electrodes and a plurality of second ablation electrodes. One end of the supporting rod is fixedly connected with the handle. The plurality of first ablation electrodes and the plurality of second ablation electrodes are respectively arranged at one end of the supporting rod far away from the handle to form a plurality of ablation electrode groups. The pulse power supply is respectively and electrically connected with each first ablation electrode and each second ablation electrode. The prior art solution described above has the disadvantage that both the plurality of first ablation electrodes and the plurality of second ablation electrodes are exposed during the ablation procedure. On the one hand, only a specific ablation electrode set is often needed to work in the operation process, other ablation electrode sets do not participate in the work, but surrounding tissues which do not need to be ablated are easy to contact, and even if the discharge is not actively triggered, residual electric fields or accidental induction signals on the surfaces of the ablation electrode sets can also stimulate sensitive tissues such as nerves or blood vessels to cause the risk of false ablation. On the other hand, a plurality of ablation electrode groups are exposed outside simultaneously, when a target area is accurately positioned, interference of the ablation electrode groups which do not participate in work is avoided, operation difficulty of operators is increased intangibly, and operation duration is prolonged. Disclosure of Invention In order to avoid the occurrence of false ablation, reduce the operation difficulty and shorten the operation time, the application provides a pulse electric field ablation device. The application provides a pulsed electric field ablation device, which adopts the following technical scheme: A pulsed electric field ablation device comprising: A handle; One end of the supporting rod is fixedly connected with the handle; one end of the supporting shell is fixedly connected with the other end of the supporting rod; the plurality of first ablation electrodes are arranged at the top end of the supporting shell along the length direction of the supporting shell; the plurality of second ablation electrodes are arranged at the top end of the supporting shell along the length direction of the supporting shell and correspond to the plurality of first ablation electrodes one by one; the wiring terminal is arranged in the handle and is respectively connected with each first ablation electrode and each second ablation electrode; a shielding mechanism is operatively mounted to the support housing for shielding the one or more first ablation electrodes and the one or more second ablation electrodes or exposing the plurality of first ablation electrodes and the plurality of second ablation electrodes. By adopting the technical scheme, in the process of performing pulsed electric field ablation surgery, the shielding mechanism can operate, so that a single or a plurality of ablation electrode groups needing to participate in an ablation task are exposed outside, the ablation electrode groups needing not to participate in the ablation task are shielded, the shielding mechanism is utilized to effectively block the ablation electrode groups needing not to work and tissues needing not to be ablated, and the occurrence of false ablation phenomenon is avoided. Because the ablation electrode group which does not need to work is shielded, the interference of the ablation electrode group does not need to be avoided when the target area is accurately positioned, the operation difficulty of an operator is effectively reduced, and the operation time is shortened. On one hand, the shielding mechanism effectively prevents blood residues or tissue scraps from adhering to the surface of the ablation electrode assembly which does not participate in the operation, ensures the conductive performance and the ablation effect in the subsequent operation, and on the other hand, when the ablation electrode assembly is switched to operate, the shielding mechanism drops the blood residues or the tissue scraps ad