A microwave ablation puncture directional device

Abstract

The present invention discloses a microwave ablation puncture directional device, comprising an inner sleeve, an outer sleeve and a puncture needle core, wherein the outer sleeve is arranged outside the inner sleeve, a first opening is arranged on the circumference of the outer sleeve, and a second opening is arranged on the circumference of the inner sleeve, and the inner sleeve can rotate relative to the outer sleeve or move in the front-back direction so that the second opening is completely staggered or partially staggered or overlapped with the first opening, and the puncture needle core can be inserted into or withdrawn from the inner sleeve, and when the puncture needle core is withdrawn from the inner sleeve, the inner sleeve is used to place the microwave ablation needle. The size of the overlapping part of the second opening and the first opening is adjusted according to the size of the lesion, so that the overlapping part is aligned with the lesion, thereby quickly defining the ablation position. Then, the microwave ablation needle is inserted into the inner sleeve so that the microwave emission source of the microwave ablation needle is at the position where the first opening and the second opening overlap, and the lesion can be directed ablated, accurate ablation is achieved, damage to human tissue is avoided, and the stability and reliability of the operation are improved.

Description

Technical Field

[0001] The invention is used in the technical field of microwave ablation, and particularly relates to a microwave ablation puncture orientation device. Background Art

[0002] The incidence of cancer is increasing year by year. Bone is the most common site of cancer metastasis, and the spine is the most common site of bone metastasis. In recent years, microwave ablation technology has been widely used in the clinical treatment of spinal metastases. It can not only relieve pain, but also control the progression of local tumors. For single bone metastases, percutaneous microwave ablation can also achieve the purpose of cure. Among them, microwave ablation needle technology uses CT-guided positioning. The puncture needle is first inserted into the bone lesion after percutaneous puncture, the needle core is removed, and then the ablation needle is inserted into the lesion through the coaxial sheath. The needle tip is used as a microwave emission source. The temperature is increased (above 50 degrees Celsius) through microwave power radiation and maintained for a period of time (several minutes), causing the tumor tissue in the area to coagulate, degenerate, and permanently die, forming an ellipsoidal coagulation necrosis area in the lesion, achieving the purpose of inactivating cancerous tissue.

[0003] The disadvantages are: the ablation needle cannot achieve directional ablation. Since the anatomical structure of the spine is relatively complex, there are many important nerves and blood vessels around it, and the shape of the tumor is not fixed, when ablation of the tumor lesion is performed clinically, the tissue that has not yet been diseased will be coagulated at the edge of the lesion, increasing the trauma surface to the human tissue and easily causing nerve and blood vessel damage. The ablation needle cannot treat metastatic tumors adjacent to blood vessels and nerves, which ultimately leads to residual tumors and recurrence. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a microwave ablation puncture directional device which can quickly define the ablation position, achieve precise ablation, avoid damage to human tissue, and improve the stability and reliability of the operation.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A microwave ablation puncture orientation device comprises an inner sleeve, an outer sleeve and a puncture needle core, wherein the outer sleeve is arranged on the outside of the inner sleeve, a first opening is provided on the circumferential surface of the outer sleeve, and a second opening is provided on the circumferential surface of the inner sleeve, the inner sleeve can rotate relative to the outer sleeve or move in the front-to-back direction so that the second opening is completely staggered or partially staggered or overlaps with the first opening, the puncture needle core can be extended into or withdrawn from the inner sleeve, and when the puncture needle core is withdrawn from the inner sleeve, the inner sleeve is used to place a microwave ablation needle.

[0007] In combination with the above implementations, in certain implementations of the present invention, a rotating handle is provided at the rear end of the inner sleeve, and the rotating handle is provided with a first through hole communicating with the inner sleeve.

[0008] In combination with the above implementations, in certain implementations of the present invention, a base is provided at the rear end of the outer sleeve, a protrusion is provided on the base, and the rotating handle of the inner sleeve is provided with a plurality of slots evenly distributed along the circumference, and the protrusion cooperates with the slots.

[0009] In combination with the above implementations, in certain implementations of the present invention, the rotating handle is provided with a second through hole arranged along the front-to-back direction, and an adjusting component is provided in the second through hole.

[0010] In combination with the above implementation, in some implementations of the present invention, the second through hole includes an inner screw hole, an outer screw is provided at the front of the adjusting component, the adjusting component cooperates with the inner screw hole through the outer screw, and the adjusting component is provided with a length scale line behind the outer screw.

[0011] In combination with the above-mentioned implementation, in certain implementations of the present invention, the base is provided with a first angle scale line on the end face close to the rotating handle, and the first angle scale line is used to mark the circumferential position of the first opening, and the rear end face of the rotating handle is provided with a second angle scale line, and the second angle scale line is used to mark the circumferential position of the second opening.

[0012] In combination with the above implementation, in certain implementations of the present invention, the projection of the first opening in the front-to-back direction coincides with the first angle scale line, the projection of the second opening in the front-to-back direction coincides with the second angle scale line, and the rotating handle is provided with an observation window for viewing the first angle scale line.

[0013] In combination with the above implementations, in certain implementations of the present invention, the front end of the outer sleeve is serrated.

[0014] In combination with the above implementations, in certain implementations of the present invention, the front end of the puncture needle core is conical, and the rear end of the puncture needle core is provided with a needle core handle.

[0015] In combination with the above implementations, in certain implementations of the present invention, the inner surfaces of the inner sleeve and the outer sleeve are both provided with a microwave absorbing layer.

[0016] One of the above technical solutions has at least one of the following advantages or beneficial effects: the microwave ablation puncture directional device is inserted into the lesion after percutaneous puncture by the puncture needle core, and then the puncture needle core is pulled out from the inner sleeve, and the inner sleeve and the outer sleeve are relatively rotated or moved back and forth, so that the second opening and the first opening are completely staggered or partially staggered or overlapped. The size of the overlapping part of the second opening and the first opening is adjusted according to the size of the lesion, so that the overlapping part is aligned with the lesion, thereby quickly defining the ablation position. Then, the microwave ablation needle is extended into the inner sleeve, so that the microwave emission source of the microwave ablation needle is at the position where the first opening and the second opening overlap, and the lesion can be directed ablated, achieving precise ablation, avoiding damage to human tissue, and improving the stability and reliability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 A schematic structural diagram of a jacket according to an embodiment of the present invention;

[0020] Figure 3 yes Figure 1 A schematic structural diagram of an inner sleeve of an embodiment shown;

[0021] Figure 4 yes Figure 1 A schematic structural diagram of a puncture needle core according to an embodiment of the present invention is shown;

[0022] Figure 5 is a schematic diagram of a use state when the first opening and the second opening overlap in one embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of a use state when the first opening and the second opening partially overlap in one embodiment of the present invention;

[0024] Figure 7 yes Figure 1 A side view of the rotating handle and base of one embodiment is shown;

[0025] Figure 8 is a schematic diagram of an embodiment of the present invention in which the first opening and the second opening are completely staggered in the circumferential direction;

[0026] Fig. 9 It is a schematic diagram of an embodiment of the present invention in which the first opening and the second opening overlap in the circumferential direction. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0028] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0029] In the present invention, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present invention, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0031] See also Figures 1 to 4 The embodiment of the present invention provides a microwave ablation puncture orientation device, comprising an inner sleeve 1, an outer sleeve 2 and a puncture needle core 3. The outer sleeve 2 is sleeved on the outside of the inner sleeve 1. The outer sleeve 2 is provided with a first opening 21 on its circumferential surface. The inner sleeve 1 is provided with a second opening 11 on its circumferential surface. The inner sleeve 1 can rotate relative to the outer sleeve 2 or move in the front-to-back direction so that the second opening 11 is completely staggered or partially staggered or overlapped with the first opening 21. The puncture needle core 3 can be extended into or withdrawn from the inner sleeve 1. When the puncture needle core 3 is withdrawn from the inner sleeve 1, the inner sleeve 1 is used to place the microwave ablation needle 4. See Figure 8 When the first opening 21 and the second opening 11 are completely offset, the microwave ablation needle 4 placed in the inner sleeve 1 cannot emit microwaves to the lesion or human tissue outside the outer sleeve 2; see Figure 5 , Figure 6 and Fig. 9When the first opening 21 and the second opening 11 are partially staggered or overlapped, the microwave ablation needle 4 placed in the inner sleeve 1 can emit microwaves to the lesion or human tissue outside the outer sleeve 2.

[0032] The microwave ablation puncture orientation device is inserted into the lesion after percutaneous puncture by the puncture needle core 3, and then the puncture needle core 3 is pulled out from the inner sleeve 1, and the inner sleeve 1 and the outer sleeve 2 are relatively rotated or moved back and forth, so that the second opening 11 and the first opening 21 are completely staggered or partially staggered or overlapped. The size of the overlapping part of the second opening 11 and the first opening 21 is adjusted according to the size of the lesion, so that the overlapping part is aligned with the lesion, thereby quickly defining the ablation position. Then the microwave ablation needle 4 is inserted into the inner sleeve 1, see Figure 5 and Figure 6 , so that the microwave emission source 41 of the microwave ablation needle 4 is at a position where the first opening 21 and the second opening 11 overlap, the lesion can be directed and ablated, precise ablation can be achieved, damage to human tissue can be avoided, and the stability and reliability of the operation can be improved.

[0033] See also Figure 1 and Figure 2 In some embodiments, a rotating handle 12 is provided at the rear end of the inner sleeve 1 to facilitate the rotation of the inner sleeve 1 to adjust the relative positions of the first opening 21 and the second opening 11 in the circumferential direction. The rotating handle 12 is provided with a first through hole 13 communicating with the inner sleeve 1, so that the puncture needle core 3 or the microwave ablation needle 4 extends into the inner sleeve 1 through the first through hole 13, ensuring the smooth progress of the work.

[0034] See 1. Figure 3 and Figure 7 In some embodiments, a base 22 is provided at the rear end of the outer sleeve 2, and a connecting hole 25 communicating with the outer sleeve 2 is provided on the base 22, and the inner sleeve 1 extends into the outer sleeve 2 through the connecting hole 25. A protrusion 23 is provided on the base 22, and a plurality of slots evenly distributed along the circumferential direction are provided on the rotating handle 12 of the inner sleeve 1, and the protrusion 23 cooperates with the slots. When the relative positions of the first opening 21 and the second opening 11 are adjusted, the inner sleeve 1 can be pushed forward so that the protrusion 23 and the slots are engaged to perform circumferential limiting to prevent the inner sleeve 1 and the outer sleeve 2 from rotating relative to each other during the ablation process, so as to ensure the accuracy of ablation. It is understandable that the position locking of the inner sleeve 1 and the outer sleeve 2 can also be achieved by providing a groove on the base 22, providing a convex block on the rotating handle 12, and the like. Among them, the number of slots can be set according to the accuracy requirements of ablation, and the number of slots determines the amplitude of a single rotation angle. The higher the accuracy requirements, the more slots are set.

[0035] See also Figure 1 , Figure 2 , Figure 5 and Figure 6In some embodiments, a second through hole 14 is provided on the rotating handle 12 along the front-to-back direction, and an adjusting component 15 is provided in the second through hole 14. The adjusting component 15 can move in the second through hole 14 along the front-to-back direction to resist the base 22, so as to adjust the distance between the inner sleeve 1 and the outer sleeve 2 in the front-to-back direction, and then adjust the positional relationship between the first opening 21 and the second opening 11 in the front-to-back direction to achieve the purpose of orientation.

[0036] The adjusting member 15 can be a pin, a screw, etc., and the second through hole 14 is correspondingly configured as a light hole or a screw hole. Figure 2 , Figure 5 and Figure 6 In some embodiments, the second through hole 14 includes an inner screw hole, and an outer screw is provided at the front of the adjustment component 15. The adjustment component 15 cooperates with the inner screw hole through the outer screw to facilitate adjustment of the distance between the outer sleeve 2 and the inner sleeve 1 in the front-to-back direction. The adjustment component 15 is provided with a length scale line behind the outer screw, which can confirm the distance that the inner sleeve 1 moves backward relative to the outer sleeve 2, which is convenient for users to use, so that the orientation of the first opening 21 and the second opening 11 in the front-to-back direction is more accurate.

[0037] See also Figure 1 After the microwave ablation puncture positioning device is guided by CT into the lesion area, the puncture needle core 3 is removed. By rotating the inner sleeve 1 and the outer sleeve 2, the overlapping portion of the first opening 21 and the second opening 11 in the circumferential direction meets the size requirements of the lesion to be ablated, and the inner sleeve 1 is pushed forward so that the slot cooperates with the protrusion 23, thereby limiting the relative displacement of the inner sleeve 1 and the outer sleeve 2 in the circumferential direction, see Figure 7 The front-to-back distance between the inner sleeve 1 and the outer sleeve 2 is adjusted by the adjusting component 15, so that the overlapped portion of the first opening 21 and the second opening 11 in the front-to-back direction meets the size requirement of the lesion to be ablated. The inner sleeve 1 can move in the front-to-back direction under the driving of the adjusting component 15 and the guidance of the protrusion, and the overlapped portion of the first opening 21 and the second opening 11 in the front-to-back direction and the circumferential direction can be determined, thereby quickly defining the ablation position. Figure 5 and Figure 6 The microwave ablation needle 4 extends the microwave emission source 41 into the inner sleeve 1 along the inner sleeve 1. When the microwave emission source 41 reaches the overlapped portion of the first opening 21 and the second opening 11, microwaves can be emitted to perform precise ablation to achieve the purpose of killing cancerous tissues. At the same time, damage to healthy human tissues is avoided, and the stability and reliability of the operation are improved.

[0038] See also Figure 7In some embodiments, the base 22 is provided with a first angle scale line 24 on the end surface close to the rotating handle 12, and the first angle scale line 24 is used to mark the circumferential position of the first opening 21. The rear end surface of the rotating handle 12 is provided with a second angle scale line 15, and the second angle scale line 15 is used to mark the circumferential position of the second opening 11. By providing the first angle scale line 24 and the second angle scale line 15, it is convenient to confirm the relative position of the first opening 21 and the second opening 11 in the circumferential direction.

[0039] The specific position of the first angle scale line 24 on the base 22 and the specific position of the second angle scale line 15 on the rotating handle 12 can be reasonably set according to the size of the base 22 and the rotating handle 12. Figure 7 In some embodiments, the projection of the first opening 21 in the front-to-back direction coincides with the first angle scale line 24, and the projection of the second opening 11 in the front-to-back direction coincides with the second angle scale line 15, so that the user can intuitively see the relative positions of the first angle scale line 24 and the second angle scale line 15 in the circumferential direction. The rotating handle 12 is provided with an observation window for viewing the first angle scale line 24. The setting of the observation window facilitates the user to view the first angle scale line 24, that is, to confirm the position of the first opening 21 in the circumferential direction.

[0040] See also Figure 1 and Figure 3 In some embodiments, the front end of the outer sleeve 2 is serrated. When the microwave ablation puncture directional device enters the human bone tissue or other parts in a spiral manner, the serrated front end of the outer sleeve 2 is conducive to opening a channel, making it easier for the microwave ablation puncture directional device to enter the human tissue.

[0041] See also Figure 1 The front end of the puncture needle core 3 is cone-shaped, and the cone-shaped front end can puncture the epidermis and extend into the human bone or other tissues to make grooves to reach the lesion area. The rear end of the puncture needle core 3 is provided with a needle core handle 31, which is convenient for holding the puncture needle core 3.

[0042] When the microwave ablation needle 4 is aimed at the overlapped position of the first opening 21 and the second opening 11 to emit microwaves, the microwaves will affect the inner sleeve 1 body and the outer sleeve 2 body near the openings, causing the inner sleeve 1 and the outer sleeve 2 to generate heat, thereby causing certain effects on healthy human tissues. In some embodiments, the inner surfaces of the inner sleeve 1 and the outer sleeve 2 are provided with a microwave absorption layer to prevent microwaves from passing through the inner sleeve 1 and the outer sleeve 2, causing the inner sleeve 1 and the outer sleeve 2 to generate heat. The microwave absorption layer can better absorb microwaves in non-target directions, prevent healthy human tissues, i.e., non-target tissues, from generating heat, and avoid damage to healthy human tissues around the lesions. It is understandable that the microwave absorption layer can be made of microwave absorption materials such as lithium cadmium ferrite, lithium zinc ferrite, and ultrafine metal particles. Among them, the inner sleeve 1 and the outer sleeve 2 can also be made of microwave absorption materials.

[0043] In the description of this specification, the description with reference to the terms "example", "embodiment" or "some embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A microwave ablation puncture orientation device, characterized in that: The invention comprises an inner sleeve, an outer sleeve and a puncture needle core, wherein the outer sleeve is arranged on the outside of the inner sleeve, a first opening is arranged on the circumference of the outer sleeve, a second opening is arranged on the circumference of the inner sleeve, the inner sleeve can rotate relative to the outer sleeve or move in the front-back direction so that the second opening is completely staggered or partially staggered or overlapped with the first opening, the puncture needle core can be extended into or withdrawn from the inner sleeve, when the puncture needle core is withdrawn from the inner sleeve, the inner sleeve is used to place the microwave ablation needle, a rotating handle is arranged at the rear end of the inner sleeve, the rotating handle is arranged with a first through hole connected with the inner sleeve, the A base is provided at the rear end of the outer sleeve, and a protrusion is provided on the base. The rotating handle of the inner sleeve is provided with a plurality of slots evenly distributed along the circumferential direction, and the protrusion cooperates with the slots. The rotating handle is provided with a second through hole arranged along the front-to-back direction, and an adjustment component is provided in the second through hole. The base is provided with a first angle scale line on the end face close to the rotating handle, and the first angle scale line is used to mark the position of the first opening in the circumferential direction. A second angle scale line is provided on the rear end face of the rotating handle, and the second angle scale line is used to mark the position of the second opening in the circumferential direction.

2. The microwave ablation puncture orientation device according to claim 1, characterized in that: The second through hole includes an inner screw hole, an outer screw is provided at the front of the adjusting component, the adjusting component cooperates with the inner screw hole through the outer screw, and the adjusting component is provided with a length scale line behind the outer screw.

3. The microwave ablation puncture orientation device according to claim 1, characterized in that: The projection of the first opening in the front-to-back direction coincides with the first angle scale line, the projection of the second opening in the front-to-back direction coincides with the second angle scale line, and the rotating handle is provided with an observation window for viewing the first angle scale line.

4. The microwave ablation puncture orientation device according to claim 1, characterized in that: The front end of the outer sleeve is serrated.

5. The microwave ablation puncture orientation device according to claim 1, characterized in that: The front end of the puncture needle core is cone-shaped, and the rear end of the puncture needle core is provided with a needle core handle.

6. The microwave ablation puncture orientation device according to claim 1, characterized in that: The inner surfaces of the inner sleeve and the outer sleeve are both provided with microwave absorbing layers.

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