Local pulsed electric field ablation device

Abstract

The invention relates to the technical field of surgical instruments for transmitting non-mechanical energy to a human body or from the human body, in particular to a local pulsed electric field ablation device which comprises an ablation auxiliary handle and a contact head which are detachably connected, and the outer circle of the end, away from the contact head, of the ablation auxiliary handle communicates with a feeding pipe used for penetrating through a catheter. The end, entering the ablation auxiliary handle, of the feeding pipe is connected with an arc-shaped transition pipe, the end, away from the ablation auxiliary handle, of the arc-shaped transition pipe is connected with a discharging pipe, an ablation catheter penetrates through the feeding pipe, and a speed control assembly used for controlling the speed of the ablation catheter entering the feeding pipe is arranged in the feeding pipe. The problem that in the prior art, a catheter entering the body of a patient for a short time is too long, and consequently secondary injury is caused to the patient is solved.

Description

Technical Field

[0001] The present application relates to the technical field of surgical instruments for transmitting non-mechanical energy to or from a human body, and in particular to a device for local pulse electric field ablation. Background Art

[0002] Ablation usually refers to the use of different energies, including radiofrequency, microwaves, drugs, freezing, etc., under the guidance of imaging tools such as X-rays to assist in precise positioning, elimination and melting of diseased tissue. According to the different radiofrequency energies, it can be divided into radiofrequency ablation, microwave ablation, chemical ablation, cryoablation, etc. Unlike traditional ablation methods such as radiofrequency, freezing, and laser, pulsed electric field ablation has high tissue selectivity, does not damage normal tissues and organs of the human body during the ablation process, and has clear ablation boundaries. At the same time, pulsed electric field ablation is non-thermal ablation, does not generate heat during the ablation process, is relatively safe, and can be used to treat areas that other cold and hot ablation methods cannot reach. On the other hand, pulsed electric field ablation does not require saline perfusion, reduces fluid intake, and is especially beneficial for patients with heart failure.

[0003] The patent name that has been made public is a Chinese patent with the application number of 202210985555.0, which is a pulsed electric field ablation device. Although this patented structure can achieve ablation treatment, during the treatment process, the catheter entering the human body may suddenly grow in a short period of time, which will cause secondary damage to the patient. Summary of the invention

[0004] The purpose of the present application is to provide a local pulse electric field ablation device, which solves the problem in the prior art that a catheter that enters the patient's body for a short time is too long, causing secondary damage to the patient.

[0005] The technical solution of this application:

[0006] The present application provides a local pulsed electric field ablation device, comprising a detachably connected ablation auxiliary handle and a contact head, wherein the outer circle of the ablation auxiliary handle away from the contact head is connected to a delivery tube for passing a catheter, the end of the delivery tube entering the ablation auxiliary handle is connected to an arc-shaped transition tube, the end of the arc-shaped transition tube away from the ablation auxiliary handle is connected to an outlet tube, an ablation catheter is passed through the delivery tube, and a speed control component for controlling the speed at which the ablation catheter enters the delivery tube is arranged inside the delivery tube.

[0007] Preferably, the outer circumference of the ablation catheter is provided with a plurality of counting buffer grooves, the speed control assembly comprises a primary buffer wheel and a forward speed measuring device connected to the primary buffer wheel, and the primary buffer wheel is meshed with the counting buffer grooves.

[0008] Preferably, the primary buffer wheel comprises a fixed rotating disc and a plurality of traveling teeth, the fixed rotating disc is provided with a plurality of transition tooth grooves, and the transition tooth grooves are staggered with the traveling teeth.

[0009] Preferably, the speed control component also includes a secondary counter, which is close to the internal movable telescopic rod, and the end of the telescopic rod is connected to a contact hemisphere, which abuts against the traveling teeth when extended and engages with the transition tooth groove when retracted. The end of the secondary counter away from the primary buffer wheel is connected to the forward speed meter.

[0010] Preferably, the traveling teeth and transition tooth grooves are both arc-shaped, and there is an arc transition between the transition tooth groove and the traveling teeth and between two adjacent counting buffer grooves. The cross-sectional shape of the counting buffer groove is an arc-shaped, and the diameters of the counting buffer groove, transition tooth groove, traveling teeth, and contact hemisphere are the same, and the diameter of the counting buffer groove is 0.1mm to 0.5mm.

[0011] Preferably, the secondary counter and the fixed turntable are both connected to a micro-driver, the micro-driver is connected to the forward speed meter signal, the forward speed meter is connected to the end of the ablation auxiliary handle away from the contact head, and the forward speed meter is configured with a counting module, a storage module, a comparison module, an analysis module, a calculation module, a control module, and a communication module.

[0012] Preferably, the end of the delivery tube away from the ablation auxiliary handle is connected with a fastening sleeve, a control sleeve and a limit sleeve. The limit sleeve, control sleeve and fastening sleeve are connected in sequence from the direction where the delivery tube is away from the ablation auxiliary handle to the direction where the delivery tube is close to the ablation auxiliary handle. The primary buffer wheel is arranged in the control sleeve, and the forward speed meter is arranged in the limit sleeve.

[0013] Preferably, the end face of the fastening sleeve close to the feeding tube abuts against the end face of the feeding tube, the inner diameter of the fastening sleeve is the same as the inner diameter of the feeding tube, the outer diameter of the fastening sleeve is larger than the outer diameter of the feeding tube, and the control sleeve is arranged on the side of the fastening sleeve away from the limiting sleeve.

[0014] Preferably, the limiting sleeve is provided with a primary through hole and a secondary through hole coaxial therewith, the primary through hole is connected with the secondary through hole, the primary through hole has an interference fit with the outer circle of the delivery tube, and the secondary through hole has an interference fit with the outer diameter of the fastening sleeve.

[0015] Preferably, a connecting ring is connected to the middle of the fastening sleeve, and the connecting ring is formed by two connecting half rings that are detachably enclosed, one of the connecting half rings is integrally formed with the fastening ring, and the primary buffer wheel is connected to the connecting half ring.

[0016] The technical solution of the present application has at least the following advantages and beneficial effects:

[0017] The present application provides a device for local pulsed electric field ablation, which is provided with a detachably connected ablation auxiliary handle, a contact head, a delivery tube, an arc-shaped transition tube, a delivery tube, and a speed control component to achieve connection with the ablation catheter, so that the ablation catheter can work normally while also being able to monitor and control the speed at which the ablation catheter enters the human body, monitor the speed at which the catheter enters the human body in real time, and give an external prompt when the speed is too fast. By automatically decelerating or manually decelerating by the surgeon, the secondary damage to the patient is minimized as much as possible, and the problem of secondary damage to the patient caused by the catheter entering the patient's body for a short time in the prior art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of this application;

[0019] Figure 2 It is a schematic diagram of the structure of the input tube in this application;

[0020] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0021] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0022] In the figure: 1-ablation auxiliary handle; 2-contact head; 3-delivery tube; 4-arc transition tube; 5-delivery tube; 6-ablation catheter; 601-counting buffer groove; 7-primary buffer wheel; 701-fixed turntable; 702-travel tooth; 703-transition tooth groove; 8-forward speed meter; 9-secondary counter; 901-telescopic rod; 902-contact hemisphere; 10-fastening sleeve; 1001-connecting semi-ring; 11-control sleeve; 12-limit sleeve; 1201-primary through hole; 1202-secondary through hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] Example 1

[0025] Please refer to Figure 1-Figure 4The present application provides a device for local pulsed electric field ablation, which includes a detachably connected ablation auxiliary handle 1 and a contact head 2, the outer circle of the ablation auxiliary handle 1 away from the contact head 2 is connected to a delivery tube 3 for passing a catheter, the end of the delivery tube 3 entering the ablation auxiliary handle 1 is connected to an arc-shaped transition tube 4, the end of the arc-shaped transition tube 4 away from the ablation auxiliary handle 1 is connected to a delivery tube 5, an ablation catheter 6 is passed through the delivery tube 3, and a speed control component for controlling the speed of the ablation catheter 6 entering the delivery tube 3 is provided in the delivery tube 3.

[0026] It is worth mentioning that the present application is provided with a detachably connected ablation auxiliary handle 1, a contact head 2, a delivery tube 3, an arc-shaped transition tube 4, a delivery tube 5, and a speed control component to realize the connection of the ablation catheter 6, so that the ablation catheter 6 can work normally while also realizing the monitoring and control of the speed at which the ablation catheter 6 enters the human body, and monitors the speed at which the catheter enters the human body in real time. When the speed is too fast, an external prompt is given, and automatic deceleration or manual deceleration by the surgeon is performed, so that pulsed electric field ablation can be performed locally in a targeted manner to avoid causing damage to non-lesioned locations in the patient's body, thereby ensuring the efficient conduct of the operation, and at the same time being able to minimize the secondary damage to the patient as much as possible, solving the problem of secondary damage to the patient caused by the catheter that enters the patient's body for a short time in the prior art.

[0027] Example 2

[0028] Please refer to Figure 1-Figure 4 On the basis of Example 1, specifically: a plurality of counting buffer grooves 601 are provided on the outer circumference of the ablation catheter 6, and the speed control component includes a primary buffer wheel 7 and a forward speed measuring device 8 connected to the primary buffer wheel 7, and the primary buffer wheel 7 is meshed with the counting buffer groove 601. The primary buffer wheel 7, the forward speed measuring device 8, and the counting buffer groove 601 are provided outside the ablation catheter 6, so that the counting buffer groove 601 is meshed with the primary buffer wheel 7, and the forward speed measuring device 8 can detect the number of teeth that the primary buffer wheel 7 has passed, and can also determine the change in the number of teeth of the primary buffer wheel 7 or the speed of rotation, thereby realizing the monitoring and control of the speed of the ablation catheter 6 entering the human body.

[0029] Preferably, the counting buffer groove 601 is an annular groove and is coaxial with the ablation catheter 6. To ensure continuous counting, the counting buffer groove 601 is coaxial with the ablation catheter 6, and a plurality of counting buffer grooves 601 run through the ablation catheter 6. Preferably, the counting buffer groove 601 is an annular groove. Since the angle or direction of the ablation catheter 6 cannot be determined when entering the device, the annular groove can ensure that the ablation catheter 6 enters the delivery tube 3 at any angle and can engage with the primary buffer wheel 7 when passing by the primary buffer wheel 7.

[0030] Because the ablation catheter 6 is to enter the human body, in order to ensure that the setting of the counting buffer groove 601 does not cause scratches on the internal tissues of the human body, the cross-sectional shape of the counting buffer groove 601 is an arc shape, and there is an arc transition between two adjacent counting buffer grooves 601 .

[0031] Please refer to Figure 3 , Figure 4 The primary buffer wheel 7 includes a fixed rotating disc 701 and a plurality of traveling teeth 702. The fixed rotating disc 701 is provided with a plurality of transition tooth grooves 703, and the transition tooth grooves 703 are arranged alternately with the traveling teeth 702. By setting the fixed rotating disc 701, the traveling teeth 702, and the transition tooth grooves 703, the fixed rotating disc 701 can be effectively meshed with the ablation catheter 6.

[0032] The speed control assembly also includes a secondary counter 9, which is close to the internal movable telescopic rod 901, and the end of the telescopic rod 901 is connected to a contact hemisphere 902, which abuts against the running tooth 702 when extended and meshes with the transition tooth groove 703 when retracted, and the end of the secondary counter 9 away from the primary buffer wheel 7 is connected to the forward speed meter 8. The secondary counter 9 and the fixed turntable 701 are both connected to a micro-driver, and the micro-driver is connected to the forward speed meter 8 signal, and the forward speed meter 8 is connected to the end of the ablation auxiliary handle 1 away from the contact head 2, and the forward speed meter 8 is configured with a counting module, a storage module, a comparison module, an analysis module, a calculation module, a control module, and a communication module.

[0033] It is worth noting that the primary buffer wheel 7 is used to perform primary counting and detection of the speed of the ablation catheter 6 entering, and the secondary counter 9 is used to perform secondary verification of the counting and detection of the primary buffer wheel 7, thereby ensuring the accuracy of counting, calculation and detection, and ensuring that the operation is completed more smoothly and efficiently. The telescopic rod 901 realizes reciprocating motion under the rotation of the fixed turntable 701 and calculates the number of telescopic times and telescopic speed during its working process. In detail, during the process of the micro-driver driving the fixed turntable 701 to rotate, the length and speed of the entire primary buffer wheel 7 are calculated according to the radius and number of the traveling teeth 702, and the length and speed are transmitted to the storage module in the forward speed meter 8. The storage module transmits the data to the counting module, the analysis module, and the calculation module, and the primary penetration speed parameter of the ablation catheter 6 is obtained by analysis; similarly, the secondary counter 9 transmits its extension and retraction times and speed to the forward speed meter 8 for analysis to obtain the verification penetration speed parameter, and then the comparison module compares the verification penetration speed parameter with the primary penetration speed parameter, and verifies it with the standard penetration speed input into the comparison module. When the speed is normal, no response is made; when the speed is too fast, an alarm is issued through the communication module and the running speed of the micro-driver is limited through the control module. The speed of the micro-driver is reduced, which increases the interaction force between the traveling teeth 702 and the counting buffer slot 601, thereby limiting the speed at which the ablation catheter 6 enters the human body, effectively realizing local pulse electric field ablation, and further ensuring that no damage is caused to non-lesional locations in the patient's body.

[0034] The traveling tooth 702 and the transition tooth groove 703 are both arc-shaped, and there is an arc transition between the transition tooth groove 703 and the traveling tooth 702 and between two adjacent counting buffer grooves 601. The cross-sectional shape of the counting buffer groove 601 is an arc-shaped. The diameters of the counting buffer groove 601, the transition tooth groove 703, the traveling tooth 702, and the contact hemisphere 902 are the same, and the diameter of the counting buffer groove 601 is 0.1 mm to 0.5 mm.

[0035] Please refer to Figure 2 The end of the delivery tube 3 away from the ablation auxiliary handle 1 is connected with a fastening sleeve 10, a control sleeve 11, and a limiting sleeve 12. The limiting sleeve 12, the control sleeve 11, and the fastening sleeve 10 are connected in sequence from the direction where the delivery tube 3 is away from the ablation auxiliary handle 1 to the direction where the delivery tube 3 is close to the ablation auxiliary handle 1. The primary buffer wheel 7 is arranged in the control sleeve 11, and the forward speed meter 8 is arranged in the limiting sleeve 12. The speed control component is installed and fixed by the fastening sleeve 10, the control sleeve 11, and the limiting sleeve 12. At the same time, the detachable connection between the delivery tube 3, the fastening sleeve 10, the control sleeve 11, and the limiting sleeve 12 can facilitate the cleaning and inspection of the entire device, realize repeated use, and reduce cost consumption.

[0036] The end face of the fastening sleeve 10 close to the feeding tube 3 abuts against the end face of the feeding tube 3, the inner diameter of the fastening sleeve 10 is the same as the inner diameter of the feeding tube 3, the outer diameter of the fastening sleeve 10 is larger than the outer diameter of the feeding tube 3, and the control sleeve 11 is sleeved on the side of the fastening sleeve 10 away from the limiting sleeve 12. The limiting sleeve 12 is provided with a primary through hole 1201 and a secondary through hole 1202 coaxial therewith, the primary through hole 1201 is communicated with the secondary through hole 1202, the primary through hole 1201 is interference fit with the outer circle of the feeding tube 3, and the secondary through hole 1202 is interference fit with the outer diameter of the fastening sleeve 10. Preferably, the control sleeve 11 and the limiting sleeve 12, the control sleeve 11 and the fastening sleeve 10, and the limiting sleeve 12 and the feeding tube 3 are all threadedly connected.

[0037] Preferably, a connecting ring is connected to the middle of the fastening sleeve 10, and the connecting ring is formed by two connecting half rings 1001 that are detachably enclosed, one of which is integrally formed with the fastening ring, and the primary buffer wheel 7 is connected to the connecting half ring 1001. In detail, a first mounting groove is provided in the middle of the fastening sleeve 10, and a second mounting groove that is connected to the first mounting groove is also provided on the end surface of the connecting half ring 1001 that is integrally formed with the fastening sleeve 10, and the first mounting groove and the second mounting groove form a placement groove for placing the primary buffer wheel 7, and the other connecting half ring 1001 is used to close the placement groove. Preferably, after the two connecting half rings 1001 are closed, a fastening ring is provided on the outside to separate the two connecting half rings 1001.

[0038] The above description is only a preferred implementation mode of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A pulsed electric field ablation device for local use, characterized in that: include: An ablation auxiliary handle (1) and a contact head (2) are detachably connected, wherein the outer circle of the end of the ablation auxiliary handle (1) away from the contact head (2) is connected to a delivery tube (3) for passing a catheter, the end of the delivery tube (3) entering the ablation auxiliary handle (1) is connected to an arc-shaped transition tube (4), and the end of the arc-shaped transition tube (4) away from the ablation auxiliary handle (1) is connected to a delivery tube (5), an ablation catheter (6) is passed through the delivery tube (3), and a speed control component for controlling the speed at which the ablation catheter (6) enters the delivery tube (3) is provided inside the delivery tube (3).

2. The pulsed electric field ablation device according to claim 1, characterized in that: The outer circumference of the ablation catheter (6) is provided with a plurality of counting buffer grooves (601), and the speed control component comprises a primary buffer wheel (7) and a forward speed measuring device (8) connected to the primary buffer wheel (7), and the primary buffer wheel (7) is meshed with the counting buffer grooves (601).

3. The pulsed electric field ablation device according to claim 2, characterized in that: The primary buffer wheel (7) comprises a fixed rotating disc (701) and a plurality of traveling teeth (702); the fixed rotating disc (701) is provided with a plurality of transition tooth grooves (703); the transition tooth grooves (703) and the traveling teeth (702) are arranged in an alternating manner.

4. The pulsed electric field ablation device according to claim 3, characterized in that: The speed control assembly further comprises a secondary counter (9), wherein the secondary counter (9) is close to an internally movable telescopic rod (901), and a contact hemisphere (902) is connected to the end of the telescopic rod (901). When the contact hemisphere (902) is extended, it abuts against the running tooth (702), and when it is retracted, it meshes with the transition tooth groove (703). The end of the secondary counter (9) away from the primary buffer wheel (7) is connected to a forward speed measuring device (8).

5. The pulsed electric field ablation device according to claim 4, characterized in that: The traveling teeth (702) and the transition tooth grooves (703) are both in the shape of circular arcs, and there is a circular arc transition between the transition tooth grooves (703) and the traveling teeth (702) and between two adjacent counting buffer grooves (601). The cross-sectional shape of the counting buffer groove (601) is in the shape of a circular arc, and the diameters of the counting buffer groove (601), the transition tooth groove (703), the traveling teeth (702) and the contact hemisphere (902) are the same, and the diameter of the counting buffer groove (601) is 0.1 mm to 0.5 mm.

6. The pulsed electric field ablation device according to claim 4, characterized in that: The secondary counter (9) and the fixed turntable (701) are both connected to a micro-driver, the micro-driver is connected to the signal of the forward speed meter (8), the forward speed meter (8) is connected to the end of the ablation auxiliary handle (1) away from the contact head (2), and the forward speed meter (8) is configured with a counting module, a storage module, a comparison module, an analysis module, a calculation module, a control module, and a communication module.

7. The pulsed electric field ablation device according to any one of claims 2 to 6, characterized in that: The end of the delivery tube (3) away from the ablation auxiliary handle (1) is connected with a tightening sleeve (10), a control sleeve (11), and a limiting sleeve (12); the limiting sleeve (12), the control sleeve (11), and the tightening sleeve (10) are connected in sequence from the direction where the delivery tube (3) is away from the ablation auxiliary handle (1) to the direction where the delivery tube (3) is close to the ablation auxiliary handle (1); the primary buffer wheel (7) is arranged in the control sleeve (11), and the forward speed meter (8) is arranged in the limiting sleeve (12).

8. The pulsed electric field ablation device according to claim 7, characterized in that: The end surface of the fastening sleeve (10) close to the feeding tube (3) abuts against the end surface of the feeding tube (3); the inner diameter of the fastening sleeve (10) is the same as the inner diameter of the feeding tube (3); the outer diameter of the fastening sleeve (10) is larger than the outer diameter of the feeding tube (3); and the control sleeve (11) is sleeved on the side of the fastening sleeve (10) away from the limiting sleeve (12).

9. The pulsed electric field ablation device according to claim 8, characterized in that: The limiting sleeve (12) is provided with a primary through hole (1201) and a secondary through hole (1202) coaxial therewith, the primary through hole (1201) is connected to the secondary through hole (1202), the primary through hole (1201) is interference fit with the outer circle of the delivery tube (3), and the secondary through hole (1202) is interference fit with the outer diameter of the fastening sleeve (10).

10. The pulsed electric field ablation device according to claim 8, characterized in that: A connecting ring is connected to the middle of the fastening sleeve (10), and the connecting ring is formed by two connecting half rings (1001) that are detachably enclosed, wherein one connecting half ring (1001) is integrally formed with the fastening ring, and the primary buffer wheel (7) is connected to the connecting half ring (1001).

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