CN216455275U - Guide structure for surgical ablation device - Google Patents

Abstract

The utility model relates to a guide structure for a surgical ablation device, belongs to the technical field of medical instruments, and solves the problem that in the prior art, an optical fiber can only ablate lesion tissues in a limited area around a straight ablation channel established by an ablation catheter. The medical optical fiber sampling device comprises an optical fiber guide tube, wherein a medical optical fiber, a lateral sampling needle or an end face incision sampling needle is detachably arranged in the optical fiber guide tube; the front end of the optical fiber guide tube is a bending channel, and the medical optical fiber, the lateral sampling needle or the end face incision sampling needle penetrates out of the bending channel to realize guide bending. The utility model increases the flexibility and diversity of the path scheme selection avoiding important tissues on one hand, and also provides an ablation scheme which can realize large focal tissues from a single channel on the other hand, thereby not only improving the efficiency of the operation, but also greatly improving the safety and the effectiveness of the operation, and realizing the minimally invasive effective treatment of 'curve overtaking'.

Description

Guide structure for surgical ablation device

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a guide structure for a surgical ablation device.

Background

As a new technology, compared with the traditional treatment means, the laser ablation has the advantages of precise and controllable ablation range, almost no damage to normal structures around the pathological changes, small operation wound, short operation time, quick postoperative recovery and the like, and particularly brings the eosin for patients with pathological changes in deep parts of the brain and intolerance to the conventional craniotomy treatment. Current ablation catheters used to deliver laser energy to achieve tissue destruction restrict the passage of the internal optical fiber through a linear surgical pathway. However, in the actual ablation operation, the position, shape and size of the tumor are influenced, and the microenvironment of other tumors such as blood vessels is also influenced, so that the scheme of the nonlinear operation channel is desired by the operator. In particular, when a tumor is located at a deep brain site and is located in close proximity to critical tissues, it is advantageous to adopt a "curve salvage" treatment strategy in order to avoid the critical brain tissues for better conformal and global ablation.

It is not easy to establish a nonlinear surgical channel in the cranium, and the operation time and the puncture difficulty are correspondingly increased. The medical optical fiber arranged in the existing ablation catheter can only realize tissue ablation of a linear channel and a limited area, namely only lesion tissues of the linear channel and the limited area nearby the linear channel can be ablated, and a plurality of linear ablation channels need to be considered for ablation of larger lesions.

In addition, in the existing laser ablation surgical scheme, if sampling is performed before ablation, sampling needs to be performed before an ablation catheter is not inserted, and if sampling is performed after ablation, sampling needs to be performed after the ablation catheter is pulled out, so that the operation difficulty of the surgery is high, and the risk that a patient is damaged and infected is extremely high.

SUMMERY OF THE UTILITY MODEL

In view of the above analysis, the embodiments of the present invention are directed to provide a guiding structure for a surgical ablation device, so as to solve the problem that the existing optical fiber can only ablate lesion tissues in a limited region around the straight ablation channel established by an ablation catheter, thereby achieving the therapeutic purpose of "curve rescue".

The utility model provides a guide structure for a surgical ablation device, which comprises an optical fiber guide tube, wherein a medical optical fiber, a lateral sampling needle or an end face incision sampling needle is detachably arranged in the optical fiber guide tube;

the front end of the optical fiber guide tube is provided with a bending channel, and the medical optical fiber, the lateral sampling needle or the end face incision sampling needle penetrates out of the bending channel to realize guide bending.

Further, the fiber guide tube comprises a first tube segment and a second tube segment; the first pipe section is provided with a pipe cavity extending along the axial direction, and the second pipe section is provided with an opening communicated with the pipe cavity.

Further, the opening communicates with the lumen to form the tortuous passage.

Further, when the medical optical fiber extends out of the bent channel for a certain distance, an included angle between the axis of the unbent part of the medical optical fiber and the axis of the bent part of the medical optical fiber is an obtuse angle.

Further, the side wall of the front end of the side sampling needle is provided with a side sampling port.

Further, the side wall of the front end of the side sampling port is an inclined surface, and the inclined surface inclines towards the rear end of the side sampling needle.

Further, the side wall of the rear end of the side sampling port is an inclined surface, and the inclined surface inclines towards the front end of the side sampling needle.

Furthermore, the front end face of the end face notch sampling needle is provided with an end face sampling port.

Furthermore, the skull nail device also comprises a guide tube base, a fixing cover and a skull nail, wherein one end of the guide tube base is arranged in the end part of the skull nail, and the other end of the guide tube base is in threaded connection with the fixing cover.

Furthermore, the sealing device also comprises a sealing plug which is arranged in the end part of the guide pipe base connected with the fixed cover.

Compared with the prior art, the utility model can realize at least one of the following beneficial effects:

(1) the front end of the optical fiber guide tube is a bending part, the front end of the bending part is provided with the arc-shaped incision, when the medical optical fiber penetrates out of the optical fiber guide tube, the medical optical fiber can be bent under the action of the bending part, important tissues on a channel can be avoided, the target focus area can be subjected to conformal ablation, a new channel does not need to be planned again, and the operation efficiency is improved.

(2) The most front end of the optical fiber guide tube is provided with a sharp arc edge, so that the brain tissue can be easily punctured and penetrated, and meanwhile, the projection of the whole bending part towards the straight tube part is positioned in the cross section of the straight tube part, so that the guide tube can extend into the brain only by opening a round small hole on the skull and guiding and positioning through a skull nail, and meanwhile, only a cylindrical channel is established in the brain, so that the tissue cannot be hooked and damaged during exiting, and minimally invasive treatment is realized.

(3) According to the utility model, the self-bending deformation of the medical optical fiber is realized through the optical fiber guide tube, and an important area which is not suitable for puncture can be avoided; the range of an ablation area can be further enlarged by adjusting the opening direction of the optical fiber guide tube, ablation which can be completed only by opening two or more channels originally is realized, and the efficiency is improved.

(4) The utility model is matched with different medical optical fibers, such as side-emitting optical fibers, and can more conveniently match focuses of different shapes by changing the opening direction of the optical fiber guide tube, complete conformal ablation and realize multi-region ablation in the same channel.

(5) According to the utility model, the scale marks are arranged on the limiting part, the marking lines are arranged on the skull nail, the rotation angle of the optical fiber guide tube can be quantitatively changed by rotating the guide tube base, other regions are ablated, the ablation area is expanded, the operation path does not need to be re-planned, and the operation efficiency is improved; meanwhile, the medical optical fiber can be pushed or retreated along the axial direction of the optical fiber guide tube by loosening the fixing cover, and the ablation area can be expanded.

(6) The optical fiber guide tube not only can be suitable for the ablation operation of optical fibers, but also can be matched with a hose sampling needle to realize bending sampling or suction of damaged tissues after ablation.

(7) The parts of the utility model are made of nuclear Magnetic compatible materials, such as glass, polytetrafluoroethylene or PC (Polycarbonate), etc., and can be operated in MR (Magnetic Resonance), and the operation can be performed under MR scanning regardless of ablation operation or residual sampling, so that the operation process can be monitored in real time, and the operation process is safer.

(8) The guide structure of the utility model can realize laser ablation operation and sampling operation according to different internal instruments (such as medical optical fibers, sampling needles or samplers); the sampling and laser ablation sequence can be reasonably arranged according to actual needs, a sampling appliance is used, a sampling channel does not need to be additionally established in the brain, a guide structure does not need to be replaced by other auxiliary devices, the application range of the device is enlarged, the operation efficiency is improved, and the injury and infection risks to a patient are reduced.

(9) The front end of the optical fiber guide tube is provided with a bending part with a lateral opening, and the medical optical fiber can penetrate out from the lateral opening of the bending part, so that the medical optical fiber guide tube is more flexible in puncture angle and puncture direction. On one hand, the flexibility and the diversity of the selection of the path scheme avoiding important tissues are increased, on the other hand, the ablation scheme which can realize large focal tissues from a single channel is also provided, the efficiency of the operation is improved, the safety and the effectiveness of the operation are also greatly improved, and the minimally invasive effective treatment of 'curve overtaking' can be realized.

In the utility model, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, wherein like reference numerals are used to designate like parts throughout.

FIG. 1 is a schematic diagram of an exemplary embodiment of a fiber guide tube configuration;

FIG. 2 is a cross-sectional view of an exemplary embodiment of a fiber guide tube;

FIG. 3 is a diagram illustrating a state in which a medical optical fiber is threaded out of a bending portion according to an embodiment;

FIG. 4 is a schematic structural diagram of a guide structure according to an embodiment;

FIG. 5 is a schematic structural diagram of a guide structure according to an embodiment;

FIG. 6 is a schematic diagram of a guide tube base structure according to an embodiment;

FIG. 7 is a schematic view of a retaining cap according to an embodiment;

FIG. 8 is a schematic view of a skull nail structure according to an exemplary embodiment;

FIG. 9 is a schematic view of multiple ablation zones obtained by varying the protrusion length of a medical optical fiber according to an exemplary embodiment;

FIG. 10 is a schematic structural view (III) of a guide structure according to an exemplary embodiment;

FIG. 11 is a schematic structural view of a guide tube base according to an embodiment;

FIG. 12 is a schematic structural view (IV) of a guide structure according to an exemplary embodiment;

FIG. 13 is a cross-sectional view of a guide structure of an exemplary embodiment;

FIG. 14 is an exploded view of a portion of the structure of the guide structure according to an exemplary embodiment;

FIG. 15 is a schematic view of the alignment of the guide tube base 0 scale with the marking line of the cranial nail according to an embodiment;

FIG. 16 is a schematic view of the alignment of the guide tube base 60 scale with the marking line of the cranial nail according to an exemplary embodiment;

fig. 17 is an ablation schematic view of the medical optical fiber according to the embodiment in a state where the light-emitting side mark corresponds to the 0 scale;

fig. 18 is an ablation schematic view of the medical optical fiber according to the embodiment in a state where the light-emitting side mark does not correspond to the 0 scale;

FIG. 19 is a cross-sectional view of an exemplary embodiment of a fiber guide tube;

FIG. 20 is a schematic cross-sectional view of an exemplary embodiment of a fiber guide tube;

FIG. 21 is a schematic cross-sectional view of an exemplary embodiment of a fiber guide tube;

FIG. 22 is a schematic cross-sectional view of an exemplary embodiment of a fiber guide tube;

FIG. 23 is a schematic cross-sectional view of an exemplary embodiment of a fiber guide tube;

FIG. 24 is a schematic cross-sectional view of a fiber guide tube according to an exemplary embodiment (VI);

FIG. 25 is a schematic cross-sectional View (VII) of a fiber guide tube according to an exemplary embodiment;

FIG. 26 is a schematic cross-sectional view of an exemplary embodiment of a fiber guide tube (eighth);

FIG. 27 is a cross-sectional view of a medical fiber guide structure according to an embodiment;

fig. 28 is a schematic view (ii) illustrating a state in which the medical optical fiber is threaded out of the bending portion according to the embodiment;

FIG. 29 is a schematic view of a lateral sampling pin according to an embodiment;

FIG. 30 is a schematic view of an embodiment of a lateral sampling needle positioned within a fiber guide tube;

FIG. 31 is a schematic side-view of a sampling probe according to one embodiment;

FIG. 32 is a schematic view of an embodiment of an end face sampling needle extended from a fiber guide tube;

fig. 33 is a schematic diagram of a sampler according to an embodiment.

Reference numerals:

1-optical fiber guide tube; 11-a bend; 111-arc incision; 12-a straight tube portion; 13-a light return film; 14-a lens structure; 15-opening; 16-a curved channel; 17-a puncture head; 2-a guide tube base; 21-a first threaded portion; 211 — a first via; 22-an optical axis part; 221-a second via; 23-a limiting part; 231-third via holes; 3-fixing the cover; 31-a threaded hole; 32-fourth via; 4-cranial bone screws; 41-a first connection; 411-fifth via; 412-mark line; 42-a second connection; 421-sixth via; 43-a second threaded portion; 5-sealing plug; 6-sheath locking screw;

100-medical optical fiber; 101-light emitting side mark; 200-skull bone; 300-target lesion area; 301-a first ablation zone; 302-a second ablation zone; 400-an obstruction; 500-lateral sampling needle; 501-side sampling port; 502-inclined plane; 600-tissue to be cleared; 700-end face notch sampling needle; 701-end face sampling port; 800-sampler.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the utility model serve to explain the principles of the utility model and not to limit its scope.

In the description of the embodiments of the present invention, it should be noted that the term "connected" is to be understood broadly, and may be, for example, fixed, detachable, or integrally connected, and may be mechanically or electrically connected, and may be directly or indirectly connected through an intermediate medium, unless otherwise specifically stated or limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The terms "top," "bottom," "above … …," "below," and "on … …" as used throughout the description are relative positions with respect to components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are multifunctional, regardless of their orientation in space.

Example 1

One embodiment of the present invention, as shown in fig. 1-2, discloses a guiding structure (hereinafter referred to as "guiding structure") for a surgical ablation device, which includes an optical fiber guiding tube 1, a medical optical fiber 100 is disposed in the optical fiber guiding tube 1, the optical fiber guiding tube 1 includes a bending portion 11 and a straight tube portion 12, the bending portion 11 is located at a front end of the straight tube portion 12, a notch is disposed at a front end of the bending portion 11, preferably, the notch is an arc-shaped notch 111, and the medical optical fiber 100 can sequentially pass through the straight tube portion 12 and the bending portion 11 and pass through the arc-shaped notch 111, so as to achieve guiding bending of the medical optical fiber 100.

The optical fiber guide tube 1 is made of transparent material, preferably optical transparent material. The medical optical fiber 100 can realize laser ablation in the straight tube portion 12, and can also realize laser ablation after penetrating out of the bending portion 11. That is, during ablation, the laser path may only penetrate through the medical optical fiber 100 to destroy the lesion, or may penetrate through the medical optical fiber 100 and the straight tube portion 12 to achieve laser ablation.

Compared with the prior art, the guide structure that this embodiment provided, the front end of optic fibre stand pipe is the flexion, and the front end of flexion is equipped with the arc incision, can realize the bending under the effect of flexion when medical optic fibre wears out from the optic fibre stand pipe, can avoid the important tissue on the passageway, and then can suitably melt target focus area 300, and need not plan new passageway again, has improved the efficiency of operation.

Due to the use of existing ablation catheters for ablation, surgical path planning and ablation channel establishment is best along the mesial axis of the lesion tissue if a greater ablation field is to be achieved or conformal ablation is to be achieved or ablation completion is to be achieved. However, such mesial access is not desirable or desirable every time, given the influence of the tumor microenvironment. In this embodiment, the front end of the optical fiber guide tube 1 is a bent portion 11 having a lateral opening, and the medical optical fiber 100 can pass through the lateral opening of the bent portion 11, so as to provide more flexibility in the puncture angle and puncture direction. On one hand, the flexibility and the diversity of the selection of the path scheme avoiding important tissues are increased, on the other hand, the ablation scheme which can realize large focal tissues from a single channel is also provided, the efficiency of the operation is improved, the safety and the effectiveness of the operation are also greatly improved, and the minimally invasive effective treatment of 'curve overtaking' can be realized.

The projection of the curved portion 11 towards the straight tube portion 12 is located within the cross section (interface perpendicular to the axis of the fiber guide tube 1) of the straight tube portion 12, i.e. the outer contour of the curved portion 11 in the axial direction of the straight tube portion 12 does not exceed the axial outer contour of the straight tube portion 12.

In the embodiment, the most front end of the optical fiber guide tube 1 presents a sharp arc edge, the brain tissue can be easily punctured and penetrated, and meanwhile, the whole bending part is also in a circle limited by the outer contour of the straight tube part 12, so that the optical fiber guide tube 1 can be extended into the brain only by opening a round small hole on the skull and guiding and positioning through a skull nail, meanwhile, only a cylindrical channel is established in the brain, other tissues cannot be damaged, the tissues cannot be hooked and pulled to cause damage when the guide tube is withdrawn, and minimally invasive treatment is realized.

The optical fiber guide tube 1 is bent at the head end, and the structure can penetrate into the brain through a through hole on a skull nail 4 for guiding. And at the same time, the medical optical fiber 100 can be guided by the bending structure of the front end.

It should be noted that the included angle between the axis of the bending portion 11 and the axis of the straight tube portion 12 is not too small to avoid breaking the medical optical fiber 100, and preferably, as shown in fig. 3, the bending portion 11 and the straight tube portion 12 are preferably arranged in such a manner that the included angle a between the axis of the unbent portion of the medical optical fiber 100 and the axis of the bent portion of the medical optical fiber 100 is between 140 ° and 170 ° when the medical optical fiber 100 extends out of the bending portion 11 for a certain distance.

As shown in fig. 4-5, the guiding structure further includes a guiding tube base 2, a fixing cover 3, a skull nail 4 and a sealing plug 5, one end of the guiding tube base 2 is disposed in the through hole of the skull nail 4, the other end of the guiding tube base is in threaded connection with the fixing cover 3, and the sealing plug 5 is disposed in the end portion of the guiding tube base 2.

As shown in fig. 6, the guide tube base 2 is a revolving structure, and includes a first thread portion 21 and an optical axis portion 22, and the first thread portion 21 and the optical axis portion 22 are respectively located at two ends of the guide tube base 2. The first threaded portion 21 is provided with an external thread.

The center of the first thread part 21 is provided with a first through hole 211, the center of the optical axis part 22 is provided with a second through hole 221, the first through hole 211 is communicated with the second through hole 221, the diameter of the first through hole 211 is larger than that of the second through hole 221, and the diameter of the second through hole 221 is equal to the outer diameter of the optical fiber guide tube 1. The end of the straight tube portion 12 of the optical fiber guide tube 1 is disposed in the second through hole 221. The first through hole 211 is coaxial with the second through hole 221.

In order to limit the end of the optical fiber guide tube 1, the guide tube base 2 is further provided with a third through hole 231 located between the first through hole 211 and the second through hole 221, the third through hole 231 is communicated with the first through hole 211 and the second through hole 221, the diameter of the third through hole 231 is smaller than that of the second through hole 221, and the diameter of the third through hole 231 is slightly larger than that of the medical optical fiber 100, so that the medical optical fiber 100 can pass through smoothly. The third through hole 231 and the second through hole 221 are coaxial.

As shown in fig. 7, the fixing cover 3 is a rotary structure, and is provided with a screw hole 31 and a fourth through hole 32, and the screw hole 31 and the fourth through hole 32 are coaxially communicated with each other. The diameter of the fourth through hole 32 is larger than the diameter of the medical optical fiber 100 and smaller than the diameter of the threaded hole 31. The first threaded portion 21 is provided in the threaded hole 31.

The sealing plug 5 is of a cylindrical structure, the sealing plug 5 is arranged in the first through hole 211, the outer diameter of the sealing plug 5 is the same as the diameter of the first through hole 211, and the diameter of the central hole of the sealing plug 5 is equal to the diameter of the medical optical fiber 100. The length of the sealing plug 5 is greater than that of the first through hole 211, and preferably, the length of the sealing plug 5 is 1.3 to 1.4 times that of the first through hole 211.

In this embodiment, the medical optical fiber 100 sequentially passes through the fourth through hole 32, the center hole of the sealing plug 5 disposed in the first through hole 211, and the third through hole 231, enters the optical fiber guide tube 1 disposed in the second through hole 221, and passes out from the front end of the optical fiber guide tube 1.

The sealing plug 5 is arranged in the first through hole 211 and used for guiding and limiting the medical optical fiber 100, after the fixing cover 3 is screwed down, a center hole of the sealing plug 5 is in interference fit with the medical optical fiber 100, and the outer diameter of the sealing plug 5 is in interference fit with the first through hole 211, so that the medical optical fiber 100 can be stably arranged in the guide tube base 2. After the fixing cover 3 is screwed to the first thread part 21, the medical optical fiber 100 is stably connected with the guide tube base 2, and the medical optical fiber 100 is limited to move along the axial direction and rotate around the axis of the medical optical fiber 100.

As shown in fig. 8, the skull nail 4 is a revolving body structure, and includes a first connecting portion 41, a second connecting portion 42, and a second thread portion 43, and the first connecting portion 41, the second connecting portion 42, and the second thread portion 43 are connected in sequence. The first connecting portion 41 is connected with the optical axis portion 22 of the guide tube base 2, and the second threaded portion 43 is provided with external threads and connected with the skull bone 200.

A fifth through hole 411 is formed in the first connecting portion 41, the diameter of the fifth through hole 411 is equal to the outer diameter of the optical axis portion 22, and the length of the fifth through hole 411 is greater than the length of the optical axis portion 22, so that the guide tube base 2 has a sufficient moving distance in the axial direction of the fifth through hole 411.

The second connecting portion 42 is provided with a sixth through hole 421, the sixth through hole 421 is communicated with the fifth through hole 411 and is coaxial, and the sixth through hole 421 penetrates the second thread portion 43 and has a diameter equal to the outer diameter of the optical fiber guiding tube 1.

In this embodiment, the optical fiber guide tube 1 is installed on the guide tube base 2, the guide tube base 2 is used for fixing the optical fiber guide tube 1 and the medical optical fiber 100, and the medical optical fiber 100 is fixed relatively by the cooperation of the sealing plug 5 and the fixing cover 3. Meanwhile, the guide tube base 2 and the skull nail 4 are matched with each other to fix the optical fiber guide tube 1. Wherein the skull nail 4 is fixed on the skull 200 and plays a role in establishing a guide channel and fixing the optical fiber guide tube 1.

The medical optical fiber 100 may be a bare optical fiber, or may be an optical fiber conduit structure with a cooling system or an optical fiber conduit structure with a non-cooling system, and the optical fiber conduit structure with a cooling system and the optical fiber conduit structure with a non-cooling system are both in the prior art and are not described herein again.

Understandably, as shown in fig. 9, by changing the extending length of the medical optical fiber 100 along the optical fiber guiding tube 1 and/or the orientation of the arc-shaped incision 111, and/or the relative position of the medical optical fiber 100 in the straight tube part 12, multi-zone ablation in the same channel can be realized to treat a larger zone of a lesion, and exemplarily, a first ablation zone 301 and a second ablation zone 302 are obtained by changing the extending length of the medical optical fiber 100 along the optical fiber guiding tube 1. Of course, as shown in fig. 4 and 10, the medical optical fiber 100 may also be laser ablated in the straight tube portion 12.

Example 2

Another embodiment of the present invention, as shown in fig. 1-2, discloses a guiding structure for a surgical ablation device, which includes an optical fiber guiding tube 1, wherein the optical fiber guiding tube 1 is an elongated tube, a medical optical fiber 100 is disposed in the optical fiber guiding tube 1, a curved portion 11 is disposed at a front end of the optical fiber guiding tube 1, and the medical optical fiber 100 penetrates through the curved portion 11 to achieve guiding and bending of the medical optical fiber 100.

Compared with the prior art, the guide structure that this embodiment provided, the front end of optic fibre stand pipe is the flexion, can realize the bending under the effect of flexion when medical optic fibre wears out from the optic fibre stand pipe, can avoid the important tissue on the passageway, and then can be to the regional 300 conformal ablation of target focus, improved the efficiency of operation.

The optical fiber guide tube 1 is bent at the front end, and can penetrate into the brain through the center hole of the skull nail 4 for guiding. And the medical optical fiber 100 can be guided by the bending structure of the front end.

The front end of the bending part 11 is provided with an arc-shaped cut 111, and the medical optical fiber 100 penetrates out of the arc-shaped cut 111 of the bending part 11, so that the medical optical fiber 100 is guided and bent.

As shown in fig. 10, the guiding structure further includes a guiding tube base 2, a fixing cover 3, a skull nail 4 and a sealing plug 5, one end of the guiding tube base 2 is connected with one end of the skull nail 4, the other end of the skull nail 4 is connected with the skull 200, the sealing plug 5 is arranged in the other end of the guiding tube base 2, and the fixing cover 3 is connected to the outer side of the other end of the guiding tube base 2.

As shown in fig. 11, the guide tube base 2 is a revolving structure, and includes a first thread portion 21, an optical axis portion 22, and a stopper portion 23, the first thread portion 21 and the optical axis portion 22 are respectively located at two ends of the guide tube base 2, and the stopper portion 23 is located between the first thread portion 21 and the optical axis portion 22. The first thread part 21 is provided with an external thread, and the outer diameters of the first thread part 21 and the optical axis part 22 are smaller than the outer diameter of the limiting part 23.

The outer cylindrical surface of the limiting portion 23 is provided with scale marks, the scale marks equally divide a circumferential angle, and the scale marks are arranged close to the light shaft portion 22.

The center of stand pipe base 2 is equipped with first through-hole 211, second through-hole 221 and third through-hole 231, first through-hole 211 and second through-hole 221 are located the both ends of stand pipe base 2 respectively, first through-hole 211, second through-hole 221 and third through-hole 231 intercommunication and coaxial.

The diameter of the second through hole 221 is smaller than the diameter of the first through hole 211 and larger than the diameter of the third through hole 231, and the diameter of the second through hole 221 is equal to the outer diameter of the fiber guide tube 1. The rear end of the optical fiber guide tube 1 is disposed in the second through hole 221. The diameter of the third through hole 231 is slightly larger than that of the medical optical fiber 100, so that the medical optical fiber 100 can pass through smoothly.

As shown in fig. 7, the fixing cover 3 is provided with a threaded hole 31 and a fourth through hole 32, and the threaded hole 31 and the fourth through hole 32 are communicated and coaxial. The diameter of the fourth through hole 32 is equal to the diameter of the medical optical fiber 100 and smaller than the diameter of the threaded hole 31. The first threaded portion 21 is provided in the threaded hole 31.

The sealing plug 5 is an elastic member having a cylindrical structure, and is disposed in the first through hole 211. The outer diameter of the sealing plug 5 is slightly larger than the diameter of the first through hole 211, and the diameter of the central hole of the sealing plug 5 is slightly smaller than the diameter of the medical optical fiber 100, so that the medical optical fiber 100 and the guide tube base 2 connected through the sealing plug 5 are stable and reliable. The length of the sealing plug 5 is greater than that of the first through hole 211, and preferably, the length of the sealing plug 5 is 1.3 to 1.4 times that of the first through hole 211.

The sealing plug 5 is arranged in the first through hole 211 and used for guiding and limiting the medical optical fiber 100, and the sealing plug 5 has elasticity, the outer diameter of the sealing plug is slightly larger than that of the first through hole 211, and the inner diameter of the sealing plug is slightly smaller than that of the medical optical fiber 100, so that the medical optical fiber 100 can be stably arranged in the guide tube base 2. In addition, after the fixing cap 3 is screwed to the first screw portion 21, the medical optical fiber 100 is firmly connected to the guide tube base 2, and the medical optical fiber 100 is restricted from moving in the axial direction and rotating around its own axis.

As shown in fig. 8, the skull nail 4 comprises a first connecting part 41, a second connecting part 42 and a second threaded part 43 which are connected in sequence. The first connecting portion 41 is connected with the optical axis portion 22 of the guide tube base 2, and the second threaded portion 43 is provided with external threads and connected with the skull bone 200.

The skull nail 4 is provided with a fifth through hole 411 and a sixth through hole 421 which are coaxial and communicated with each other in the center, the fifth through hole 411 is arranged at the end of the first connecting part 41, the diameter of the fifth through hole 411 is equal to the outer diameter of the light shaft part 22, and the length of the fifth through hole 411 is greater than the length of the light shaft part 22, so that the guide tube base 2 has a sufficient moving distance in the axial direction of the fifth through hole 411. The sixth through hole 421 penetrates the second screw portion 43, and has a diameter equal to the outer diameter of the optical fiber guide tube 1.

In this embodiment, the medical optical fiber 100 sequentially passes through the fourth through hole 32, the center hole of the sealing plug 5, and the third through hole 231, and then enters the optical fiber guide tube 1 disposed in the second through hole 221. The optical fiber guide tube 1 passes through the fifth through hole 411 and the sixth through hole 421, and then passes through the end of the second threaded portion 43 to penetrate into the brain, and the medical optical fiber 100 can pass through the bent portion 11 of the optical fiber guide tube 1 to perform laser ablation operation.

In order to further limit the optical fiber guide tube 1, as shown in fig. 12, 13, and 14, the guide structure further includes a sheath locking screw 6, an axis of the sheath locking screw 6 is perpendicular to an axis of the optical fiber guide tube 1, and the sheath locking screw 6 can pass through a through hole radially disposed along the first connection portion 41 and press against the outer wall of the optical axis portion 22.

It is noted that the cylindrical surface of the first connecting portion 41 is provided with a marking line 412, and the marking line 412 is parallel to the axis of the skull nail 4 and is arranged near the end of the first connecting portion 41 so as to determine the rotation angle of the guide tube base 2 relative to the skull nail 4. Because the skull nail 4 is fixedly connected with the skull 200 through threads, the medical optical fiber 100 is tightly matched and connected with one end of the guide tube base 2 through the sealing plug 5, and the optical fiber guide tube 1 is tightly matched with the other end of the guide tube base 2, the orientation of the arc-shaped incision 111 of the medical optical fiber 100 can be changed by rotating the guide tube base 2, and accordingly, the conformal ablation of the target focus area 300 can be realized.

Understandably, in order to facilitate better operation of the guiding structure, the graduation line of the limiting portion 23 is provided with 0 mark point (i.e. 0 graduation), and the graduation line corresponding to the 0 mark point is aligned with the marking line 412, which is the starting position of the guiding structure.

In this embodiment, the optical fiber guide tube 1 is installed on the guide tube base 2, the guide tube base 2 is used for fixing the optical fiber guide tube 1 and the medical optical fiber 100, and the medical optical fiber 100 is fixed relatively by the cooperation of the sealing plug 5 and the fixing cover 3. Meanwhile, the guide tube base 2 is matched with the skull nail 4 and the sheath locking screw 6 to complete the fixing and guiding structure of the medical optical fiber 100. Wherein the skull nail 4 is fixed on the skull 200 and plays a role in establishing a guide channel and fixing the optical fiber guide tube 1. The position direction of the optical fiber guide tube 1 is judged through the marking line 412 on the skull nail 4 and the angle scale mark on the guide tube base 2.

In the actual operation process, the first region is ablated at the 0 ° scale in the above description, at this time, the fixing cover 3 is unscrewed to pull the medical optical fiber 100 backward so that the front end of the medical optical fiber 100 does not exceed the bending part 11, the sheath locking screw 6 is unscrewed, the guiding tube base 2 is rotated to adjust the orientation of the arc-shaped incision 111, the sheath locking screw 6 is screwed, at this time, the bending position of the outlet of the optical fiber guiding tube 1 is changed, so that the medical optical fiber 100 is extended out of the optical fiber guiding tube 1, and the second region can be ablated. The ablation area can be expanded not only in the axial direction in which the medical optical fiber 100 protrudes but also in the radial direction of the guide tube 1.

Illustratively, as shown in fig. 15 and 16, the first region is ablated at 0 scale, the optical fiber is retracted by unscrewing the fixing cover 3, the sheath locking screw 6 is unscrewed, the base 2 of the guide tube is rotated to 60 scales, and then the sheath locking screw 6 is tightened, the bending orientation of the outlet of the optical fiber guide tube 1 is changed, so that the medical optical fiber 100 extends out of the optical fiber guide tube 1, and the second region can be ablated. Or keeping the medical optical fiber 100 still and directly rotating the guide tube base 2 to 60 scales after unscrewing the sheath locking screw 6.

Example 3

In another embodiment of the present invention, a guiding structure for a surgical ablation device is disclosed, where the medical optical fiber 100 is a medical optical fiber (i.e., a side-emitting optical fiber) capable of emitting light from a side, and on the basis of embodiment 2, as shown in fig. 17 and 18, a light-emitting side mark 101 is provided on the medical optical fiber 100 to mark a direction of a light outlet, and at this time, the position and size of an ablation region can be further controlled by loosening the fixing cover 3 and then adjusting the direction of the light outlet of the medical optical fiber 100, so as to more easily perform conformal ablation. Other structures and advantageous effects are the same as those of embodiment 2, and are not described in detail herein.

Example 4

In another embodiment of the present invention, a guide structure for a surgical ablation device is disclosed, the guide structure having a light transmission for transmitting a light path. Further, the front end of the optical fiber guide tube 1 is provided with a light path adjusting component, the light path adjusting component is arranged on the front end side wall of the straight tube portion of the optical fiber guide tube 1, and when the front end of the medical optical fiber 100 is located in the straight tube portion, the light path adjusting component can change the light path of laser emitted by the medical optical fiber 100 located in the optical fiber guide tube 1 so as to ablate the target focus area 300.

The light path adjusting component comprises a reflective membrane 13 and a lens structure 14, wherein the reflective membrane 13 is used for guiding the light rays emitted by the medical optical fiber 100 to the direction of the target lesion area 300 so as to realize unidirectional emission; the reflective membrane 13 and the lens structure 14 cooperate to accommodate tumors of more diverse shapes.

The lens structure 14 may vary the size and/or shape of the ablation volume. Due to the addition of the lens structure 14, the ablation region which is originally in a circular ring shape is converted into an ablation region with a specific shape (as shown in fig. 22 and 26), so that the lens structure can be adapted to more irregular tumors.

The lens structure 14 is located on the fiber guide tube 1. understandably, the lens structure 14 can be provided on the inner wall of the fiber guide tube 1 as a separate component, for example, the lens structure 14 is adhered to the inner wall of the fiber guide tube 1, or can be a part of the fiber guide tube 1.

In this embodiment, in order to reduce the volume of the sheath structure, the lens structure 14 and the optical fiber guiding tube 1 are an integral structure. Of course, the lens structure 14 can also be made on the side wall of the optical fiber guiding tube 1, and the lens structure 14 is embedded in the groove provided on the side wall of the optical fiber guiding tube 1.

The lens structure 14 may be a condenser, preferably a convex lens, or a diverging mirror, preferably a concave lens.

When the lens structure 14 is a convex lens, the laser emitted by the medical optical fiber 100 is circumferentially dispersed and changed into parallel light to be emitted after passing through the convex lens, so that the ablation of the target lesion area 300 of the position where the lens structure 14 is located can be locally protruded and/or deepened.

When the lens structure 14 is a concave lens, the laser emitted by the medical optical fiber 100 is circumferentially dispersed and becomes more dispersed after passing through the concave lens, so that the coverage of the light emitted from the position of the lens structure 14 is enlarged, and the ablation effect is enhanced.

In the sheath structure provided by this embodiment, the lens structure 14 is disposed on the optical fiber guiding tube 1, and when the medical optical fiber 100 is used in an ablation operation, the path of the laser emitted from the medical optical fiber 100 is changed by the lens structure 14 disposed on the optical fiber guiding tube 1, so that ablation of tumors with irregular shapes becomes more flexible and easier to operate.

The reflective film 13 and the lens structure 14 are disposed opposite to each other and located on two sides of the medical optical fiber 100. As shown in fig. 19 to 22, the lens structure 14 is a convex lens, the laser light emitted from the circumferential direction of the medical optical fiber 100 is focused after being parallel and returned to the convex lens when encountering the reflective film 13, and the medical optical fiber 100 directly transmits the parallel light beam formed by the convex lens, so that ablation on a certain region of the target lesion area 300 can be enhanced.

As shown in fig. 23-26, the lens structure 14 is a concave lens, and the laser emitted from the medical optical fiber 100 in the circumferential direction is parallel and returns to the concave lens after encountering the reflective film 13, and is refracted by the concave lens and then emitted at a larger refraction angle, and the medical optical fiber 100 directly penetrates through the light beam refracted by the concave lens, so that the ablation of the target lesion area 300 in a specific range can be enhanced.

Understandably, in this embodiment, different light emitting ranges can also be obtained by changing the covering area of the reflective film 13 along the radial direction of the optical fiber guide tube 1 and/or changing the structure of the arc-shaped surface where the reflective film 13 is disposed, which is not described herein again.

Compared with embodiments 1 to 4, the optical path adjusting component is provided at the front end of the optical fiber guide tube 1, so that the type of the medical optical fiber 100 can be enlarged. In this embodiment 4, the medical optical fiber 100 may be any one of a side-emitting optical fiber, a dispersion optical fiber, or a ring optical fiber.

Example 5

The utility model further discloses a guiding method for a surgical ablation device, which adopts the guiding structure and comprises the following steps:

step 1: the skull nail 4 is fixed on the planned path according to the operation plan and keeps a fixed state with the skull 200.

Step 2: the medical optical fiber 100 is inserted into the optical fiber guide tube 1, and the front end of the medical optical fiber 100 does not exceed the bending part 11 of the optical fiber guide tube 1. One end of the guide tube base 2 is connected with the optical fiber guide tube 1, and the other end is provided with the sealing plug 5 and the fixing cover 3 in a screwing mode.

The medical optical fiber 100 is kept in a straight state so that no other substance enters the optical fiber guide tube 1 to cause subsequent blockage when the optical fiber guide tube 1 is inserted into the brain. The medical optical fiber 100 can also realize laser ablation in the straight tube portion 12, that is, the front end of the medical optical fiber 100 is located in the straight tube portion 12 and does not enter the bent portion 11 or extend out of the bent portion 11.

Understandably, the medical optical fiber 100 may also be afterloaded.

And step 3: according to the operation plan, the optical fiber guide tube 1 is inserted into a designated position through the skull nail 4, an area needing to be avoided is avoided, corresponding scale marks are arranged on the optical fiber guide tube 1, and the insertion depth can be visually confirmed.

At this time, the fixing cover 3 is unscrewed to enable the medical optical fiber 100 and the optical fiber guide tube 1 to be capable of moving in a single axial direction, thrust is applied to the medical optical fiber 100 through the outside, the medical optical fiber 100 can be slowly moved inwards continuously, and due to the bending structure of the front end of the optical fiber guide tube 1, the medical optical fiber 100 can be bent along with the bending surface. The curved surface is preferably smooth, since otherwise a jamming situation may occur. The medical optical fiber 100 passing through the bending portion 11 is straightened due to the influence of its own characteristics, and at this time, the light-emitting portion at the front end of the medical optical fiber 100 reaches the target lesion area 300, and skillfully avoids the area with the obstacle 400, and the fixing cover 3 is screwed, so that the ablation treatment can be further completed.

And 4, step 4: unscrewing the fixing cover 3 to pull the medical optical fiber 100 backwards so that the front end of the medical optical fiber 100 does not exceed the bending part 11, unscrewing the sheath locking screw 6, rotating the guide tube base 2 to adjust the orientation of the arc-shaped incision 111, and screwing the sheath locking screw 6, wherein the bending position of the outlet of the optical fiber guide tube 1 is changed, so that the medical optical fiber 100 extends out of the optical fiber guide tube 1, and the second region can be ablated. The ablation area can be expanded not only in the axial direction in which the medical optical fiber 100 protrudes but also in the radial direction of the guide tube 1.

According to the utility model, the self-bending deformation of the medical optical fiber is realized through the optical fiber guide tube, and an important area which is not suitable for puncture can be avoided; by adjusting the direction of the optical fiber guide tube, the range of an ablation area can be further expanded, ablation which can be completed only by opening two channels originally is realized, and the efficiency is improved; matching with different medical optical fibers, the utility model can more conveniently match with the focuses of different shapes to complete conformal ablation.

It should be noted that the front end of the existing ablation catheter (i.e. the end contacting with the focal tissue for ablation) is closed and is only a linear ablation channel, and the medical optical fiber can only move within the axial range of the ablation catheter, so that the ablation range of the focal tissue is limited to a limited area around the ablation catheter. The utility model provides a guide structure for a surgical ablation device,

the front end of the optical fiber guiding tube 1 is a bending part 11 with a lateral opening (i.e. the arc-shaped incision 111), and the medical optical fiber 100 can be guided and bent by passing through the lateral opening of the bending part 11. This feature expands the range of motion of the medical optical fiber 100, which can move both in the axial direction and in the radial direction, and thus can ablate large focal tissues in a single channel. Meanwhile, under the condition that the tumor microenvironment is not ideal, for example, the tumor is positioned in the deep part of the brain, and a plurality of important tissues, blood vessels and the like are arranged around the tumor, the medical optical fiber guide structure also increases the flexibility and the diversity of the selection of the path scheme avoiding the important tissues.

Example 6

One embodiment of the present invention, as shown in fig. 27-28, discloses a medical optical fiber guiding structure, which comprises an optical fiber guiding tube 1. The front end of the optical fiber guide tube 1 in the above embodiment is formed in a curved shape to realize bending when the medical optical fiber 100 is passed out. In this embodiment 6, the optical fiber guiding tube 1 is a tubular body with a tubular structure, and in order to realize bending of the medical optical fiber 100 when it is threaded out, an opening 15 needs to be formed on the side wall of the front end of the optical fiber guiding tube 1.

Specifically, the optical fiber guide tube 1 comprises a first tube section and a second tube section, the first tube section has a lumen extending along the axial direction, and the side wall of the second tube section has an opening 15 communicating with the lumen, so that the passage of the opening 15 communicating with the lumen is a curved passage 16. Preferably, the lumen is smoothly connected with the opening 15, and a set included angle α is formed between the extending direction of the curved channel 16 and the extending direction of the lumen, and the set included angle α is an obtuse angle.

Notably, the front end of the second tube section is a piercing head 17.

The medical optical fiber 100 or other sampling devices (such as a sampling needle, a sampler, etc.) can penetrate through the opening to realize the guided bending, and the set included angle a is preferably set to be between 140 ° and 170 ° between the axis of the unbent part of the medical optical fiber 100 and the axis of the bent part of the medical optical fiber 100 when the medical optical fiber 100 realizes the guided bending.

Further, the first pipe section is a straight pipe portion 12 of the optical fiber guide pipe 1, and the second pipe section is a bent portion 11 of the optical fiber guide pipe 1; the medical optical fiber 100 passes out of the bending portion 11 to realize guided bending.

Example 7

Edema and other problems may arise after ablation surgery, and the risk may be reduced by removing a portion of the damaged tissue. Meanwhile, the target tissue can be sampled and detected before and after the ablation operation is finished, so that pathological analysis can be conveniently carried out on the target tissue.

In another embodiment of the present invention, as shown in fig. 29 to fig. 31, the above-mentioned guiding structure is adopted, the medical optical fiber 100 is replaced by a lateral sampling needle 500, and the connection relationship between the lateral sampling needle 500 and the guiding structure is the same as the connection relationship between the medical optical fiber 100 and the guiding structure, and the details are not repeated herein.

The side direction sampling needle 500 is arranged in the optical fiber guide tube 1, the side sampling port 501 is arranged on the front end side wall of the side direction sampling needle 500, the front end side wall of the side sampling port 501 is an inclined surface 502, preferably, the inclined surface 502 inclines towards the rear end of the side direction sampling needle 500, so that when the side direction sampling needle 500 is taken out, a sample can be cut off from the tissue 600 to be cleaned by utilizing the inclined surface 502, and the front end of the side direction sampling needle 500 is conical.

In this embodiment, the lateral sampling needle is a hollow hose, the hose has a certain strength to ensure its own straightness, but can be bent by the structural influence of the bending portion, the basic characteristics are consistent with those of the optical fiber, and a polytetrafluoroethylene tube is preferably used. The head end of the lateral sampling needle is made into a cone shape to facilitate puncture, an opening is arranged on one side of the lateral sampling needle for sampling, and the foremost end of the opening is made into a sharp incision shape to cut off the sample from the tissue. The rear end of the hose can be connected with a negative pressure pump, and the pressure difference in the hollow pipe can be adjusted to suck a fluid sample and the like.

When the lateral sampling needle 500 is used together with a guide structure, firstly, the skull nail 4 and the optical fiber guide tube 1 are fixed, a path is confirmed, after an ablation operation is completed, the medical optical fiber 100 is taken out, then the lateral sampling needle 500 is inserted into the brain from one end of the optical fiber guide tube 1, the tip end of the lateral sampling needle is inserted into the brain to reach an indication position, and at the moment, a negative pressure pump at the tail end of the lateral sampling needle 500 works, so that tissues to be sampled can be adsorbed to the hollow part of the lateral sampling needle 500. If some cerebrospinal fluid, blood, etc. is fluid, it can be sucked slowly for this purpose, and if some hard tissue is sucked, the tissue is cut away by the inclined surface 502 by pulling back the lateral sampling needle 500 after the suction to complete the sampling or removal.

Understandably, the rear end side wall of the side sampling port 501 is an inclined surface, the inclined surface is inclined towards the front end of the side sampling needle 500, when the side sampling needle 500 enters, a sample can be cut off from the tissue 600 to be cleared, the sample can be stored in the hollow part at the front end of the side sampling needle 500, and a negative pressure pump is not needed when the side sampling needle 500 is pulled out.

Further, as the medical optical fiber 100 according to the above-mentioned embodiment, the lateral sampling needle 500 can also be adjusted in the radial direction and the axial direction, and can complete sampling operations in different areas by adjusting and sampling for a plurality of times, thereby removing excessive damaged tissues after ablation, and facilitating pathological analysis of the sampled tissues by medical staff. The specific adjustment method is not described in detail.

Still further, the development coating is coated on the side sampling port 501 of the side direction sampling needle 500, and when an operation is performed in an MR environment, the position of the sampling needle can be monitored through an MR scanning image, so that the sampling is more accurate and safer, and other substances in the brain cannot be damaged.

It should be noted that the lateral sampling needle 500 can be used in combination with the medical fiber 100 described above, i.e., the lateral sampling needle 500 can be used to perform a sampling operation before or after ablation using the medical fiber 100.

Example 8

In another embodiment of the present invention, as shown in fig. 32, by using the above-mentioned guiding structure, if the position to be sampled is closer to the fiber guiding tube 1 or the position to be sampled is larger, the medical optical fiber 100 is replaced with an end face incision sampling needle 700, and the connection relationship between the end face incision sampling needle 700 and the guiding structure is the same as the connection relationship between the medical optical fiber 100 and the guiding structure, which is not described herein again.

The end face sampling port 701 (cut) of the end face incision sampling needle 700 is arranged at the foremost end, and in the inserting process, the cut can cut off tissues and store the tissues in the hollow tube of the end face incision sampling needle 700, and when the tissue is drawn out, the tissues in the hollow tube can not be separated through a negative pressure pump connected with the rear end of the end face incision sampling needle 700 and leave together with the end face incision sampling needle 700.

Understandably, like the lateral sampling needle 500 of the embodiment 7, the matching guide structure can also be adjusted in the radial direction and the axial direction, so that the sampling or the removal of damaged tissues can be realized in a larger range, the efficiency is high, and the sampling is convenient.

It should be noted that the end-face-cut sampling needle 700 may be used in conjunction with the medical fiber 100 described above, i.e., the end-face-cut sampling needle 700 may be used to perform a sampling operation before or after ablation using the medical fiber 100.

Example 9

In another embodiment of the present invention, as shown in fig. 33, the above-mentioned guiding structure is adopted, and understandably, the guiding structure can be matched with a sampler 800 capable of meeting the requirement for sampling, the sampler 800 is a prior art and is commonly used in an endoscope tube, the specific structure is not described in detail, the sampler 800 is provided with a silk thread which can control the closing and opening of a front sampler, after the sampler 800 extends out of the optical fiber guiding tube 1, the front sampler 800 is opened, and after reaching the position, the front sampler 800 is pulled by the structure to be closed, and then the sampler is withdrawn along the optical fiber guiding tube 1.

It is noted that the sampler 800 may be used in conjunction with the medical fiber 100 described above, i.e., the sampler 800 may be used to perform a sampling operation before or after ablation using the medical fiber 100.

It should be noted that the lateral sampling needle 500 in example 7, the end-face-notched sampling needle 700 in example 8, and the sampler 800 in example 9 may be integrally formed as a flexible tube having a certain strength to ensure its linearity, but being bent by the structure of the bent portion, the basic characteristics being consistent with those of the optical fiber, and a teflon tube is preferably used.

The optical fiber guide tube 1 not only can be an operation channel of laser ablation, but also can be a sampling channel of the lateral sampling needle 500 or the end face incision sampling needle 700 or the sampler 800 when the ablation is finished, so that the lesion can be damaged in the same operation, and the lesion after the damage can be sampled. In addition, the hardness of the optical fiber guide tube 1 is much greater than the hardness of the medical optical fiber 100, the lateral sampling needle 500, the end-face incision sampling needle 700, and the sampler 800. The lateral sampling needle 500, the end-face cut sampling needle 700 and the sampler 800 can be implemented by the prior art, and are not described in detail herein.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims (10)

1. A guide structure for a surgical ablation device is characterized by comprising an optical fiber guide tube (1), wherein a medical optical fiber (100), a lateral sampling needle (500) or an end face incision sampling needle (700) are detachably arranged in the optical fiber guide tube (1);

the front end of the optical fiber guide tube (1) is provided with a bending channel (16), and the medical optical fiber (100), the lateral sampling needle (500) or the end face incision sampling needle (700) penetrates out of the bending channel (16) to realize guide bending.

2. The guiding structure for a surgical ablation device according to claim 1, said fiber optic guiding tube (1) comprising a first tube section and a second tube section; the first pipe section is provided with a pipe cavity extending along the axial direction, and the second pipe section is provided with an opening communicated with the pipe cavity.

3. A guide structure for a surgical ablation device according to claim 2, said opening communicating with said lumen to form said curved channel (16).

4. The guiding structure for surgical ablation device according to claim 3, wherein the angle between the axis of the unbent portion of the medical optical fiber (100) and the axis of the bent portion of the medical optical fiber (100) is obtuse when the medical optical fiber (100) is extended a certain distance out of the bent channel (16).

5. The guiding structure for surgical ablation device according to any one of claims 1 to 4, wherein the side wall of the front end of the lateral sampling needle (500) is provided with a side sampling port (501).

6. The guiding structure for surgical ablation device according to claim 5, wherein the front side wall of the side sampling port (501) is an inclined surface (502), and the inclined surface (502) is inclined toward the rear end of the side sampling needle (500).

7. The guiding structure for a surgical ablation device according to claim 5, wherein the side wall of the rear end of the side sampling port (501) is an inclined surface inclined toward the front end of the side sampling needle (500).

8. A guide structure for a surgical ablation device according to any one of claims 1 to 4, wherein the front end face of the end face incision sampling needle (700) is provided with an end face sampling port (701).

9. The guiding structure for surgical ablation device according to any one of claims 1-4, 6-7, further comprising a guiding tube base (2), a fixing cap (3) and a skull nail (4), wherein one end of the guiding tube base (2) is arranged in the end of the skull nail (4), and the other end is in threaded connection with the fixing cap (3).

10. A guide structure for a surgical ablation device according to claim 9, further comprising a sealing plug (5), the sealing plug (5) being provided in the end of the guide tube base (2) to which the fixing cap (3) is connected.

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