CN116172693A - Disk-type conformal ablation needle - Google Patents

Disk-type conformal ablation needle Download PDF

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Publication number
CN116172693A
CN116172693A CN202310029849.0A CN202310029849A CN116172693A CN 116172693 A CN116172693 A CN 116172693A CN 202310029849 A CN202310029849 A CN 202310029849A CN 116172693 A CN116172693 A CN 116172693A
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CN
China
Prior art keywords
ablation
needle
electrode
disc
puncture
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Pending
Application number
CN202310029849.0A
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Chinese (zh)
Inventor
孙昌江
岳万利
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Shanghai Ruisu Chuangsheng Medical Technology Co ltd
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Shanghai Ruisu Chuangsheng Medical Technology Co ltd
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Priority to CN202310029849.0A priority Critical patent/CN116172693A/en
Publication of CN116172693A publication Critical patent/CN116172693A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00577—Ablation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B2018/1807—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using light other than laser radiation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
    • A61B2018/1869—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves with an instrument interstitially inserted into the body, e.g. needles

Abstract

A disk-type conformal ablation needle comprises a puncture needle rod (1) and an ablation electrode (2), wherein the puncture needle rod (1) is provided with a hollow inner cavity, and the ablation electrode (2) is preformed into a disk shape and is contracted in the hollow inner cavity of the puncture needle rod (1); the front part of the puncture needle rod (1) is provided with a needle outlet hole (3), and the rear end of the puncture needle rod (1) is sequentially connected with an electrode handle (4), an adjusting handle (7) and a cable connecting seat (9); the front end of the ablation electrode (2) is opposite to the needle outlet hole (3), and the rear end of the ablation electrode (2) is connected with the adjusting handle (7). The disk-type conformal ablation needle can ablate pie-shaped tumors and can puncture and ablate tumors in most positions.

Description

Disk-type conformal ablation needle
Technical Field
The present invention relates generally to the field of medical devices, and more particularly to a disc-type conformal ablation needle.
Background
The ablation needle is a minimally invasive medical instrument for treating various benign and malignant tumors of entities by using an ablation technology, and the ablation needle is used for treating the focus by acting microwave or radio frequency energy. The principle is that the temperature of cells at a lesion is increased by microwave or radio frequency energy, so that the cells are denatured and coagulated and necrotized, and the purpose of killing tumor cells is achieved.
For the main-stream ablation needles on the market, the ablation needles can be divided into single-needle ablation needles and multi-needle ablation needles in terms of the number of electrode needles, and their ablation shapes can be generally elliptical, anchor-shaped or umbrella-shaped (see fig. 1, 2, 3). The electrode needle can ablate most tumors, but when ablating some pie tumors, the ablation cannot be completed at one time due to the large difference between the ablation shape and the tumor shape. When the ablation electrodes are used for ablation, if the ablation is required to be performed once to the tumor boundary, the ablation time is required to be increased, the ablation area is spherical or spindle-shaped due to the shape of the electrodes, excessive ablation can be caused, if the ablation is performed for multiple times, multiple times of tissue penetration is required, the tissue damage is relatively large, and the operation time is also increased.
Chinese patent CN201143230Y discloses a planar conformal ablation electrode for treating lumbar diseases, the ablation area of which is flat, and which can ablate a pie-shaped tumor, but the ablation plane is parallel to the plane formed by the deployment of the electrode needle (see fig. 4). Therefore, the use of the ablation needle is limited, the growth position of some tumors is special, and the penetration of the ablation needle has great damage to the human body.
Disclosure of Invention
The invention aims to provide a disk-type conformal ablation needle which can ablate pie tumors and has a wider application range.
The invention relates to a disk-type conformal ablation needle, which comprises a puncture needle rod and an ablation electrode, wherein the puncture needle rod is provided with a hollow inner cavity, and the ablation electrode is preformed into a disk shape and is contracted in the hollow inner cavity of the puncture needle rod;
the front part of the puncture needle rod is provided with a needle outlet, and the rear end of the puncture needle rod is sequentially connected with an electrode handle, an adjusting handle and a cable connecting seat; the front end of the ablation electrode is opposite to the needle outlet hole, and the rear end of the ablation electrode is connected with the adjusting handle;
when ablation begins, the ablation electrode can extend out of the needle outlet hole and be unfolded to form a disc-shaped ablation plane through the forward rotation movement of the adjusting handle, and the disc-shaped ablation plane is perpendicular to the puncture needle rod; after the ablation is finished, the ablation electrode is completely contracted into the puncture needle rod through the reverse rotation movement of the adjusting handle.
In particular, a temperature sensor is also arranged in the hollow inner cavity of the puncture needle rod.
In particular, the length of the ablation electrode extending from the puncture needle rod is controllable, and the size of the formed disc-shaped ablation plane is adjustable.
In specific cases, the front end of the puncture needle rod is in a needle point shape.
In specific cases, the puncture needle bar is provided with puncture depth graduation marks along the length direction.
Under specific conditions, the electrode handle is provided with position indication points, and the adjusting handle is provided with electrode length scale marks.
Preferably, the adjusting handle is provided with an electrode limiting pin.
The invention provides a vortex-shaped disk electrode which can be matched with cake-shaped tumors of different sizes and can perform real-time temperature monitoring, so that the ablation shape is matched with the tumor shape, the safety and effectiveness of treatment can be ensured, the treatment time is shortened, the wound area is reduced, the rehabilitation of a patient is facilitated, and the like.
The disk-type conformal ablation needle can ablate pie-shaped tumors, can puncture and ablate most tumors, and can form puncture and ablation positions complementary with the existing planar ablation electrode. In addition, the ablation needle can be properly adjusted according to the size of the tumor, and the maximum ablation diameter after adjustment is 6cm, so that conformal ablation is realized.
Drawings
Fig. 1-4 are simulated views of the ablation shape of a prior art ablation needle.
Fig. 5 is a schematic perspective view of an ablation needle of the invention.
Fig. 6 is a schematic cross-sectional view of an ablation needle of the invention.
Fig. 7 is an enlarged schematic view of the exit orifice of the ablation needle of the invention.
Fig. 8 is an enlarged schematic view of a temperature sensor of the ablation needle of the invention.
Fig. 9 is a simulated view of the ablation shape of the inventive ablation needle.
The reference numerals in the drawings represent respectively: the puncture needle comprises a 1-puncture needle rod, a 2-ablation electrode, a 3-needle outlet, a 4-electrode handle, a 5-position indication point, a 6-electrode limiting pin, a 7-adjusting handle, an 8-electrode length scale mark, a 9-cable connecting seat, a 10-temperature sensor, an 11-needle tip and a 12-puncture depth scale mark.
Detailed Description
The invention will now be described in detail with reference to specific embodiments thereof in connection with the accompanying drawings.
Referring to fig. 1-3, the ablation shape of existing ablation needles is generally spherical, spindle-shaped, or otherwise shaped. For some pie tumors, the shape of the pie tumors cannot be adjusted, if the pie tumors are ablated by using the ablation electrode with the shape of sphere, spindle or other shapes, the ablation area exceeds the tumor area too much, the damage to normal tissues is relatively large, if the pie tumors are ablated in a divided manner, the ablation time length is prolonged due to the need of repeated puncturing, and the tissues are also damaged greatly due to repeated puncturing.
Referring to fig. 4, the existing planar electrode needle-out mode is to needle out along the side face of the puncture hole direction, the extended electrode and the puncture hole are in the same plane, so that the tumor in some special positions is difficult to puncture, the damage to normal tissue and organs is large, and the recovery of a patient is not facilitated.
Therefore, the invention designs a disk-type conformal ablation needle, which can ablate pie-shaped tumors at first, and the ablation plane of the disk-type conformal ablation needle is vertical to the puncture plane (or has a certain inclination angle), so that the disk-type conformal ablation needle can puncture and ablate tumors in most positions and can form puncture and ablation positions complementary with the existing plane ablation electrode. And secondly, the temperature of the ablation needle can be monitored in real time, and the eschar of the ablation needle can be prevented. The ablation needle can be properly adjusted according to the size of the tumor, and the maximum ablation diameter after adjustment is 6cm, so that conformal ablation is realized.
Referring specifically to fig. 5-7, the disc-type conformal ablation needle of the present invention generally comprises a needle shaft 1 and an ablation electrode 2. The needle shaft 1 has a hollow interior. The lancet shaft 1 is typically made of an insulating material. The ablation electrode 2 is generally made of a memory alloy material, preformed into a disc shape and contracted in the hollow cavity of the puncture needle shaft 1.
The front end of the puncture needle rod 1 is provided with a needle tip 11, and the needle tip 11 is used for puncturing. An outlet needle hole 3 is arranged on the needle rod near the needle tip 11, and the front end of the ablation electrode 2 is opposite to the outlet needle hole 3. The lancet shaft 1 is provided with puncture depth graduation marks 12 in the length direction. The rear end of the puncture needle rod 1 is sequentially connected with an electrode handle 4, an adjusting handle 7 and a cable connecting seat 9. The electrode handle 4 is fixedly connected with or integrally formed with the puncture needle bar 1. The adjusting handle 7 is movably connected with the electrode handle 4. The cable connecting seat 9 is connected with the adjusting handle 7. The rear end of the ablation electrode 2 is wound on a rotating wheel in the interior of the adjustment handle 7. The electrode handle 4 is provided with a position indication point 5, and the adjusting handle 7 is provided with an electrode length scale line 8. In addition, it is preferable that the ablation electrode 2 is positioned by the electrode stopper pin 6 after the ablation electrode 2 is controlled to be protruded to a proper length by the adjustment handle 7, so that the subsequent ablation operation is facilitated. Specifically, a spiral groove is provided in the electrode handle 4, a pin hole is provided in the adjustment handle 7, and the rotation of the ablation electrode 2 is limited by the electrode limiting pin 6.
At the beginning of ablation, the ablation electrode 2 can be extended from the needle outlet hole 3 and unfolded to form a disc-shaped ablation plane which is perpendicular to the puncture needle rod 1 by the forward rotation movement of the adjusting handle 4. After the ablation is finished, the ablation electrode 2 is completely contracted into the puncture needle rod 1 through the reverse rotation movement of the adjusting handle 4. The extending length of the ablation electrode 2 can be observed in real time through the indication of the position indication point 5 and the electrode length scale mark 8, and the size of the disc-shaped ablation plane can be adjusted.
Referring specifically to fig. 8, a temperature sensor 10 is also disposed within the hollow interior of the lancet shaft 1. The temperature of the ablation site can be detected on line by the temperature sensor 10, so that the power of the ablation electrode 2 can be regulated in time.
The following briefly describes the operation of the disc type compliant ablation needle of the present invention.
Under the guidance of CT or ultrasonic imaging technology, the disk-type conformal ablation needle is punctured into the central area of a tumor, puncture depth is observed in an auxiliary way through puncture depth graduation marks 12 on the insulating puncture needle rod 1, the puncture needle rod 1 is fixed by a medical adhesive tape after the puncture is finished, the adjusting handle 7 is slowly rotated by the fixed electrode handle 4, the extending size of the ablation electrode 2 is observed through CT and ultrasonic imaging, and the extending range of the ablation electrode 2 is observed in an auxiliary way through position indication points 5 on the electrode handle 4 and electrode length graduation marks 8 on the adjusting handle 7. The ablation needle and the ablation host are connected together through the cable connecting seat 9 by using a cable, and the shape of the ablated electrode is cake-shaped as the electrode is disc-shaped, and can be overlapped with the shape of a tumor as shown in fig. 9. After the ablation is completed, the connecting wire is pulled out, then the electrode adjusting handle 7 is rotated to rotate and retract the ablation electrode 2, then the medical adhesive tape is taken down, and the puncture needle rod 1 is taken out, so that the ablation operation is completed.
The needle-out mode of the electrode is a rotary needle-out mode, the ablation needle is disc-shaped after extending out of the needle rod, and the ablation plane and the plane where the puncture hole is positioned have a certain angle (vertical or have a certain inclination angle), so that the tumor at some special positions can be punctured easily. The ablation needle can control the needle outlet amount of the electrode needle through the electrode adjusting handle, can be properly adjusted according to the tumor size, can monitor the ablation temperature through the thermocouple at the front end of the needle rod during ablation, and can timely adjust the ablation power through an algorithm. The disc-type conformal ablation needle of the invention can be applied to most pie-shaped tumors, and can generate a pie-shaped solidification area in a few minutes.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.

Claims (7)

1. The disc type conformal ablation needle is characterized by comprising a puncture needle rod (1) and an ablation electrode (2), wherein the puncture needle rod (1) is provided with a hollow inner cavity, and the ablation electrode (2) is preformed into a disc shape and is contracted in the hollow inner cavity of the puncture needle rod (1);
the front part of the puncture needle rod (1) is provided with a needle outlet hole (3), and the rear end of the puncture needle rod (1) is sequentially connected with an electrode handle (4), an adjusting handle (7) and a cable connecting seat (9); the front end of the ablation electrode (2) is opposite to the needle outlet hole (3), and the rear end of the ablation electrode (2) is connected with the adjusting handle (7);
when ablation starts, the ablation electrode (2) can extend out of the needle outlet hole (3) and be unfolded to form a disc-shaped ablation plane through the forward rotation movement of the adjusting handle (7), and the disc-shaped ablation plane is perpendicular to the puncture needle rod (1); after the ablation is finished, the ablation electrode (2) is completely contracted into the puncture needle rod (1) through the reverse rotation movement of the adjusting handle (7).
2. A disc-type conformal ablation needle according to claim 1, wherein a temperature sensor (10) is further provided in the hollow lumen of the needle shaft (1).
3. A disc-shaped conformable ablation needle according to claim 1, characterized in that the length of the ablation electrode (2) extending from the needle shaft (1) is controllable, and the size of the formed disc-shaped ablation plane is adjustable.
4. A disc-type conformal ablation needle according to claim 1, wherein the front end of the needle shaft (1) is needle-pointed.
5. A disc-type conformal ablation needle according to claim 1, wherein the needle shaft (1) is provided with penetration depth graduations (12) along the length direction.
6. A disc-type conformal ablation needle according to claim 1, wherein a position indication point (5) is arranged on the electrode handle (4), and an electrode length scale mark (8) is arranged on the adjusting handle (7).
7. A disc conformal ablation needle according to claim 1, wherein an electrode limit pin (6) is provided on the adjustment handle (7).
CN202310029849.0A 2023-01-09 2023-01-09 Disk-type conformal ablation needle Pending CN116172693A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310029849.0A CN116172693A (en) 2023-01-09 2023-01-09 Disk-type conformal ablation needle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310029849.0A CN116172693A (en) 2023-01-09 2023-01-09 Disk-type conformal ablation needle

Publications (1)

Publication Number Publication Date
CN116172693A true CN116172693A (en) 2023-05-30

Family

ID=86439660

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310029849.0A Pending CN116172693A (en) 2023-01-09 2023-01-09 Disk-type conformal ablation needle

Country Status (1)

Country Link
CN (1) CN116172693A (en)

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