CN114948361B

CN114948361B - Safe-to-use intratumoral turbulent flow device

Info

Publication number: CN114948361B
Application number: CN202210904739.XA
Authority: CN
Inventors: 荆洪娟; 黄嘉平
Original assignee: Hangzhou Yike Medical Technology Co ltd
Current assignee: Hangzhou Yike Medical Technology Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-10-25
Anticipated expiration: 2042-07-29
Also published as: CN114948361A

Abstract

The invention discloses a safe-to-use intratumoral turbulent flow device which comprises a pushing rod, a releasing wire, a releasing piece and a turbulent flow net, wherein the pushing rod is provided with a rod cavity, the near end of the releasing piece is limited in the rod cavity by the releasing wire and is in a limiting state, the far end of the releasing piece extends out of the rod cavity and is connected with the turbulent flow net, a safety cylinder is fixed inside the pushing rod close to the far end of the pushing rod and is provided with a safety cavity, a releasing hole is arranged at the near end of the releasing piece, a safety distance is arranged between the near end of the releasing piece and the far end of the safety cylinder, the releasing wire is provided with a U-shaped turning-back end, the turning-back end is formed by enabling the far end of the releasing wire to sequentially penetrate through the safety cavity and the releasing hole and then turn back to the safety cavity, the turning-back end and the rod cavity are configured into a butting state, and the limiting state of the releasing piece can be released only after the near end of the releasing piece is pulled away from the near end of the releasing wire until the near end of the releasing piece and the far end of the safety cylinder, so that misoperation of an operator is effectively prevented and the disturbing flow net is released in advance.

Description

Safe-to-use intratumoral turbulent flow device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a safe intratumoral turbulent flow device.

Background

Intratumoral turbulent flow devices have been widely used as a new method for interventional embolization of aneurysms by placing a turbulent flow net inside the aneurysm to occlude the ostium of the aneurysm, thereby blocking blood flow and causing the aneurysm to gradually collapse.

At present, an intra-tumor current disturbing device generally adopts electrolytic elimination to release a current disturbing net, the traditional electrolytic elimination uses a human body as a loop, an anode is connected with a power supply through a stainless steel conveying rod, a cathode is inserted into the arms and other parts of the human body, and the cathode and the anode are communicated through long human blood vessels, so that the release is very slow.

In order to realize rapid release, CN112274210A is provided with a cathode and an anode which are very close to each other, and the cathode and the anode are connected with the anode and the cathode of a power supply respectively through conductive wires with insulating layers, so that rapid release of a release part is realized. Although CN112274210A can rapidly release the turbulent flow net, and reduce the operation time, in the operation process of an operator, if the electrolysis release switch is turned on in advance due to misoperation, the turbulent flow net can be released in advance, and the injury can be brought to a patient, so that the conventional intratumoral turbulent flow device adopts an electrolysis release mode, and the hidden trouble in use can be unsafe.

Disclosure of Invention

The invention aims to solve the technical problem that the prior art has the defects, and provides the intra-tumor spoiler device which is safe to use, so as to overcome the technical defect that the spoiler network is easy to release in advance in the prior art.

According to the invention, the intratumoral turbulent flow device is safe to use, and comprises a pushing rod, a release wire, a release part and a turbulent flow net, wherein the pushing rod is provided with a rod cavity, the proximal end of the release part is limited in the rod cavity by the release wire and is in a limited state, the distal end of the release part extends out of the rod cavity and is connected with the turbulent flow net, the turbulent flow net is provided with a plurality of meshes, the meshes allow blood to flow into an aneurysm at a speed lower than that of thrombus formation, a safety cylinder is fixed inside the pushing rod close to the distal end of the pushing rod, the safety cylinder is provided with a safety cavity communicated with the rod cavity, the cavity diameter of the safety cavity is smaller than that of the rod cavity, the proximal end of the release part is provided with a release hole, a safety distance is reserved between the proximal end of the release part and the distal end of the safety cylinder, the release wire is provided with a U-shaped folding end, the folding end is formed by folding back of the safety cavity after the distal end of the release wire sequentially penetrates through the safety cavity and the release hole, the folding end of the release wire is configured into a butting state with the distal end of the release cylinder, and the release part is configured into a butting state between the folding end of the release part, and the release wire, and the release part, and the release state is released from the proximal end of the restriction state.

Further, the safety cylinder and the push rod are fixed through welding.

Furthermore, the safety cylinder and the push rod are integrally formed, and the safety cylinder is formed by local inward protrusion of the inner wall of the push rod.

Further, the lumen diameter of the safety lumen is smaller than the proximal end dimension of the release member such that the proximal end of the release member cannot pass through the safety lumen.

Furthermore, the end of turning back includes first silk section, the second silk section that turns back from first silk section, lies in the intermediate silk section between first silk section and the second silk section, and the intermediate silk section is worn to establish on the hole of extricating, and the distal end of first silk section, the distal end of second silk section all with the pole chamber butt.

Further, the piece that disengages includes the head of disengaging and the pole of disengaging that is connected with the head of disengaging, and the pole of disengaging is connected with the vortex net, and the head of disengaging has relative first butt face and the second butt face that sets up, and the distal end butt of first silk section is between first butt face and pole chamber, and the distal end butt of second silk section is between second butt face and pole chamber.

Furthermore, the release head is cylindric, and two cylindric terminal surfaces of release head form first butt face and second butt face respectively, and the release hole runs through first butt face and second butt face.

Further, the proximal end of the first wire segment and the proximal end of the second wire segment are both abutted with the safety cavity.

Furthermore, the spoiler net is a spherical single-layer net, a far-end developing ring is arranged at the far end of the spoiler net, a near-end developing ring is arranged at the near end of the spoiler net, and the spoiler net and the far end of the release piece are fixedly connected through the near-end developing ring.

Furthermore, the turbulence net is a conical double-layer net which is formed by folding back a single-layer net along the middle position of the single-layer net in the axial direction, a near-end developing ring is arranged at the near end of the turbulence net, and the near-end developing ring connects and fixes the turbulence net and the far end of the release piece.

Compared with the prior art that the intra-tumor disturbing flow device releases the disturbing flow net in an electrolytic release mode, the disturbing flow net is released in a pulling and releasing mode, the safety cylinder is additionally arranged, the safety distance is arranged between the release piece and the safety cylinder, when the near end of the release wire is pulled out, the release piece can move along with the release wire and cannot be released, the release wire can be completely pulled out until the near end of the release piece is abutted to the far end of the safety cylinder, namely, the limit state of the release piece can be released, the disturbing flow net is prevented from being released in advance due to misoperation of an operator to a certain degree, injury to a patient is avoided, and the use is safer.

Drawings

A more complete understanding of the present invention, and the attendant advantages and features thereof, will be more readily understood by reference to the following detailed description when considered in conjunction with the accompanying drawings wherein:

FIG. 1 is a schematic overall structure diagram of the first embodiment;

FIG. 2 is a schematic view of the distal end of the release wire, the release head, the release rod and the spoiler net according to the first embodiment;

FIG. 3 is a schematic structural view of the distal end of the push rod, the distal end of the release wire, the release head and the release rod in the first embodiment;

FIG. 4 is a schematic structural view of the distal end of the release wire, the release head and the release rod of FIG. 3;

FIG. 5 is a schematic structural diagram of the second embodiment with the spoiler removed;

FIG. 6 is a partial cross-sectional structural schematic view of FIG. 5;

FIG. 7 is a schematic view of the stop collar of FIG. 6;

FIG. 8 is a schematic view of the structure of the release wire stem of FIG. 6;

FIG. 9 is a schematic structural view of the distal end of the release wire, the release head, the release rod and the spoiler net in the third embodiment;

in the drawings: 1 is the push rod, 2 is the release silk, 3 is the release head, 4 is the release rod, 5 is a safety cylinder, 6 is the vortex net, 7 is the pole chamber, 8 is the safety chamber, 9 is the release hole, 10 is first silk section, 11 is the second silk section, 12 is middle silk section, 13 is first butt face, 14 is the second butt face, 15 is the spacing ring, 16 is the release silk handle, 17 is spacing arch, 18 is spacing recess.

It should be noted that the appended drawings illustrate rather than limit the invention. It is noted that the drawings representing structures may not be drawn to scale. Also, in the drawings, the same or similar elements are denoted by the same or similar reference numerals.

Detailed Description

In order that the present invention may be more clearly and easily understood, the following detailed description is given in conjunction with the specific embodiments and the accompanying drawings.

The term "proximal" as used in this embodiment refers to the end distal to the blood vessel, i.e., the end distal to the spoiler, and the term "distal" refers to the end proximal to the blood vessel, i.e., the end proximal to the spoiler.

The first embodiment is as follows: as shown in fig. 1 to 4, the intratumoral turbulent flow device of the present embodiment includes a pushing rod 1, a release wire 2, a release head 3, a release rod 4, a safety cylinder 5, and a turbulent flow net 6. This disturbance device in tumour is used for through putting into disturbance net 6 in the aneurysm in order to block off the tumour mouth of aneurysm, because disturbance net 6 has a plurality of meshs, a plurality of meshs can allow blood to flow into in the aneurysm with the speed that is less than thrombus formation, consequently disturbance net 6 can block the blood flow and make the aneurysm atrophy gradually, this disturbance net 6 is conical double-deck net, double-deck net is that single-deck net is turned back along its intermediate position in the axial and forms, double-deck net has improved the shutoff effect, therefore the disturbance effect is better, the near-end of disturbance net 6 is equipped with near-end development ring, near-end development ring is made for the material that does not pass through X ray, adopt metal materials such as platinum tungsten alloy, platinum iridium alloy or tantalum alloy to make, near-end development ring is cyclic annular.

Propelling movement pole 1 is the hypotube, it has pole chamber 7, safe section of thick bamboo 5 is fixed in the inside near propelling movement pole 1 distal end for example the welding, safe section of thick bamboo 5 is close to the setting of propelling movement pole 1 distal end promptly, safe section of thick bamboo 5 is an annular section of thick bamboo, safe section of thick bamboo 5 has and is less than the safe chamber 8 of pole chamber 7 chamber footpath with pole chamber 7 intercommunication and chamber footpath, of course, safe section of thick bamboo 5 also can be with propelling movement pole 1 integrated into one piece, for example safe section of thick bamboo 5 and propelling movement pole 1 are stainless steel and make, safe section of thick bamboo 5 is protruding formation in local by the inside of propelling movement pole 1 inner wall, propelling movement pole 1 possesses pole chamber 7 and safe chamber 8 simultaneously promptly.

The releasing wire 2 and the releasing head 3 are arranged in the rod cavity 7 in a penetrating mode, the near end of the releasing wire 2 extends out of the near end of the rod cavity 7, the near end of the releasing head 3 is a free end and is limited in the rod cavity 7 by the far end of the releasing wire 2 to be in a limiting state, the far end of the releasing head 3 is fixedly connected with the releasing rod 4, the near end of the releasing rod 4 is located in the rod cavity 7, the far end of the releasing rod 4 extends out of the rod cavity 7 and is fixedly connected with the turbulence net 6 through a near-end developing ring, the releasing head 3 and the releasing rod 4 form releasing parts and respectively form the near end and the far end of the releasing part, namely the near end of the releasing part is located in the rod cavity 7 and is limited in the limiting state by the rod cavity 7, and the far end of the releasing part extends out of the rod cavity 7 and is connected with the turbulence net 6. The size of the proximal end of the releasing piece, namely the releasing head 3, is larger than the bore diameter of the safety bore 8, so that the proximal end of the releasing piece, namely the releasing head 3, cannot pass through the safety bore 8, the releasing head 3 is provided with a releasing hole 9, the releasing head 3 is limited in the rod bore 7 under the action of the distal end of the releasing wire 2, specifically, the distal end of the releasing wire 2 is a U-shaped folded end, the folded end is formed by sequentially passing the distal end of the releasing wire 2 through the safety bore 8 and the releasing hole 9 and then folding back the safety bore 8, the folded end comprises a first wire section 10, a second wire section 11 folded back from the first wire section 10 and an intermediate wire section 12 positioned between the first wire section 10 and the second wire section 11, the intermediate wire section 12 is arranged on the releasing hole 9, the distal end of the first wire section 10 and the distal end of the second wire section 11 are both abutted against the rod bore 7, so that the distal end of the releasing wire 2 sequentially passes through the safety bore 8 and the releasing hole 9 and then abuts against the rod bore 7, and the releasing head 3 is limited in the rod bore 6, and the releasing head is limited in the rod bore 6.

In order to improve the limiting effect on the releasing head 3 and ensure the stability of the abutment of the releasing head 3, the releasing head 3 of the embodiment has a first abutment surface 13 and a second abutment surface 14 which are oppositely arranged, the first abutment surface 13 and the second abutment surface 14 are both planes, the distal end of the first filament section 10 of the releasing filament 2 abuts between the first abutment surface 13 and the rod cavity 7, and the distal end of the second filament section 11 of the releasing filament 2 abuts between the second abutment surface 14 and the rod cavity 7, so that the abutment area is increased, the releasing filament 2 cannot be pulled out too easily, and thus the releasing filament 2 can be prevented from being separated from the rod cavity 7 and the releasing head 3 to cause the releasing head 3 to be too easy to release under unexpected conditions, the releasing head 3 can be cylindrical and has an axis perpendicular to the axis of the push rod 1, the first abutment surface 13 and the second abutment surface 14 are respectively formed on two cylindrical end surfaces of the releasing head 3, and the releasing hole 9 penetrates through the first abutment surface 13 and the second abutment surface 14. Furthermore, the proximal ends of the first wire section 10 of the release wire 2 and the second wire section 11 of the release wire 2 are abutted against the safety lumen 8, so as to further prevent the release wire 2 from undesirably disengaging from the rod lumen 7 and the release head 3, which would cause the release head 3 to be too easily released.

In order to prevent the operator from mistakenly pulling the releasing wire 2 to release the releasing head 3 in advance, i.e. mistakenly releasing, in the embodiment, a safety distance is arranged between the proximal end of the releasing head 3 and the distal end of the safety cylinder 5, when the proximal end of the releasing wire 2 is pulled out, the releasing head 3 can move together with the releasing wire 2 and cannot be released, and until the proximal end of the releasing head 3 abuts against the distal end of the safety cylinder 5, the proximal end of the releasing head 3 cannot pass through the safety cavity 8 because the cavity diameter of the safety cavity 8 of the safety cylinder 5 is smaller than the proximal end size of the releasing head 3, so that the releasing head 3 cannot move together with the releasing wire 2, and thus the releasing head 3 can be completely pulled out by the releasing wire 2, i.e. the limited state of the releasing head 3 can be released, and thus the releasing head 3 and the spoiler net 6 can be effectively prevented from being released in advance due to misoperation of the operator. The safety distance may be set according to specific situations, and therefore the embodiment is not limited.

In this embodiment, after the spoiler 6 is conveyed into the aneurysm, the release wire 2 is pulled so as to be pulled away from the release head 3, and then the release head 3 is released, so that the spoiler 6 is released. In-process, at first the head 3 of releasing can move and can't release along with the release silk 2 together, until the near-end of the head 3 of releasing and the distal end butt of a safety cylinder 5 after, the head 3 of releasing can not move along with the release silk 2 again, just so can realize that the release silk 2 takes out the dissociation completely and takes off the head 3, the restriction state of the head 3 of releasing promptly can just be relieved, so effectively prevent operating personnel's maloperation and release in advance and take off head 3 and vortex net 6.

Example two: different from the first embodiment, as shown in fig. 5 to 8, in the present embodiment, a limiting ring 15 is sleeved outside the pushing rod 1 near the proximal end thereof, the limiting ring 15 is sleeved outside the pushing rod 1 near the proximal end thereof and is fixedly connected to the pushing rod 1, a release wire handle 16 is fixedly connected to the proximal end of the release wire 2 after extending out of the rod cavity 7, that is, the release wire handle 16 is located at the proximal end of the pushing rod 1, the proximal end of the release wire 2 may be directly and fixedly connected to the distal end of the release wire handle 16, or may extend into the release wire handle 16 and be fixedly connected to the proximal end of the release wire handle 16, the release wire handle 16 is provided for better drawing the release wire 2, the release wire handle 16 is partially located in the limiting ring 15, the inner wall of the limiting ring 15 is provided with a limiting structure for preventing the release wire handle 16 from excessively moving, the release wire handle 16 forms a limiting space with the limiting ring 15 under the effect of the limiting structure, and the safety space is smaller than the limiting space, that the release wire handle 16 can move within the disturbed flow and release wire handle 16 can be smoothly released from the release head, so that the release wire handle 2 can be further removed from the release head 3, and the release head can be conveniently, and the release wire 2 in advance, and the release head can be further conveniently released from the release head, so that the release head of the release wire 2. So, through the synergism of the safety cylinder 5 that is located the push rod 1 distal end and the spacing ring 15 that is located the push rod 1 near-end, effectively reduced the maloperation of operation or reduced the operation and remedied the degree of difficulty. In addition, the separating of the separating wire 2 enables the separating head 3 to be normally released so as to enable the turbulent flow net 6 to be normally separated, the limiting structure can also effectively limit the separating wire handle 16 to drive the separating wire 2 to excessively stretch into the blood vessel to damage the blood vessel, and can also effectively limit the separating wire handle 16 to be completely separated from the whole device so as to be not beneficial to the recovery of the whole device.

The limiting structure comprises a limiting protrusion 17 extending inwards, the limiting protrusion 17 is formed by locally inwards recessing the outer wall of a limiting ring 15, a limiting groove 18 is formed in the outer wall of the releasing screw handle 16, the limiting protrusion 17 is located in the limiting groove 18, the length of the limiting protrusion 17 is smaller than that of the limiting groove 18 along the axial direction of the push rod 1, so that the releasing screw handle 16 can move relative to the limiting ring 15, and the releasing head 3 is driven to release the releasing screw 2. Specifically, the limiting protrusion 17 is an annular protrusion and is W-shaped, the limiting groove 18 is an annular groove, and along the axial direction of the push rod 1, the limiting protrusion 17 is in sliding fit with the limiting groove 18, the shape of the proximal end of the limiting protrusion 17 is matched with the shape of the proximal end of the limiting groove 18, and the shape of the distal end of the limiting protrusion 17 is matched with the shape of the distal end of the limiting groove 18, so that the release screw handle 16 is in fit connection with the limiting ring 15 through the limiting protrusion 17 and the limiting groove 18, so that the release screw handle 16 can rotate relative to the limiting ring 15 and can move restrictively, and the fit reliability is high. Of course, the limiting protrusion can also be a local protrusion, and the shape can also be V-shaped or U-shaped.

In the embodiment, after the spoiler 6 is conveyed into the aneurysm, the release wire handle 16 is pulled to drive the release wire 2 to release the release head 3, and then the release head 3 is released to release the spoiler 6. In the process, initially, the releasing head 3 can move together with the releasing wire 2 and cannot be released until the proximal end of the releasing head 3 abuts against the distal end of the safety cylinder 5, the releasing head 3 cannot move together with the releasing wire 2, so that the releasing wire 2 can be completely pulled out and the releasing head 3 can be released, namely, the limited state of the releasing head 3 can be released, so that the releasing head 3 and the turbulence net 6 can be effectively prevented from being released in advance due to misoperation of an operator, and after releasing, if the releasing wire handle 16 is continuously pulled, the limiting groove 18 moves along with the releasing wire handle 16, because the proximal end shape of the limiting groove 18 is matched with the proximal end shape of the limiting protrusion 17, after the proximal end of the limiting groove 18 is contacted with the proximal end of the limiting protrusion 17, the limiting protrusion 17 can prevent the releasing wire handle 16 from being excessively pulled through the limiting groove 18, so that the releasing wire handle 16 is prevented from being completely pulled out of the whole device and is not beneficial to recovery of the whole device, and similarly, because the distal end shape of the distal end of the limiting groove 18 is matched with the distal end of the limiting protrusion 17, the limiting protrusion 17 can prevent the blood vessel from being excessively pushed into the limiting groove 18, and the blood vessel can prevent the blood vessel from being excessively pushed into the limiting groove 18 and the blood vessel from being excessively pushed into the blood vessel.

Other structures of the present embodiment are consistent with those of the present embodiment, and are not described herein again.

Example three: different from the first embodiment, as shown in fig. 9, the spoiler 6 of the present embodiment is a spherical single-layer net, a distal end of the spoiler 6 is provided with a distal end developing ring, a proximal end of the spoiler 6 is provided with a proximal end developing ring, and the spoiler 6 and a distal end of the release member, i.e., the release rod 4, are fixedly connected by the proximal end developing ring. The single-layer net enables the forming process of the turbulence net 6 to be simpler, and the far-end developing ring is easier to arrange.

It is to be understood that while the present invention has been described in conjunction with the preferred embodiments thereof, it is not intended to limit the invention to those embodiments. It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. A safe-to-use intratumoral turbulent flow device comprises a push rod (1), a release wire (2), a release piece and a turbulent flow net (6), wherein the push rod (1) is provided with a rod cavity (7), the near end of the release piece is limited in the rod cavity (7) by the release wire (2) and is in a limiting state, the far end of the release piece extends out of the rod cavity (7) and is connected with the turbulent flow net (6), the turbulent flow net (6) is provided with a plurality of meshes, the meshes allow blood to flow into an aneurysm at a speed lower than that of thrombosis, and the safe-to-use intratumoral turbulent flow device is characterized in that a safe cylinder (5) is fixed inside the push rod (1) close to the far end thereof, safety cylinder (5) have with pole chamber (7) intercommunication and chamber footpath be less than safety chamber (8) of pole chamber (7) chamber footpath, the proximal end of disengagement piece is equipped with disengagement hole (9), have safe interval between the proximal end of disengagement piece and the distal end of safety cylinder (5), disengagement silk (2) have the back end of U-shaped, the back end is passed safety chamber (8) in proper order, safety chamber (8) are turned back and are formed behind disengagement hole (9) through the distal end with disengagement silk (2), be configured into the butt state between back end and pole chamber (7), when taking out disengagement silk (2) proximal end, until the proximal end of disengagement piece and the distal end butt back of safety cylinder (5), the restriction state of disengagement piece can only be relieved.

2. A safe-to-use intratumoral turbulence device according to claim 1, characterized in that said safety cylinder (5) is fixed to the pushing rod (1) by welding.

3. A safe-to-use intratumoral turbulence device according to claim 1, characterized in that said safety cylinder (5) is integrally formed with the pushing stem (1), the safety cylinder (5) being formed by a local inward projection of the inner wall of the pushing stem (1).

4. A safe-to-use intratumoral turbulence device according to claim 1, characterized in that the diameter of said safety lumen (8) is smaller than the proximal dimension of the release element, so that the proximal end of the release element cannot pass through the safety lumen (8).

5. A safe-to-use intratumoral turbulence device according to claim 1, characterized in that said folded-back end comprises a first wire segment (10), a second wire segment (11) folded back from the first wire segment (10), an intermediate wire segment (12) located between the first wire segment (10) and the second wire segment (11), the intermediate wire segment (12) being threaded onto the relief hole (9), the distal end of the first wire segment (10) and the distal end of the second wire segment (11) being in abutment with the rod lumen (7).

6. A safe-to-use intratumoral turbulence device according to claim 5, characterized in that said release member comprises a release head (3) and a release rod (4) connected to the release head (3), the release rod (4) being connected to the turbulence grid (6), the release head (3) having a first abutment surface (13) and a second abutment surface (14) arranged opposite each other, the distal end of the first wire segment (10) abutting between the first abutment surface (13) and the rod lumen (7), the distal end of the second wire segment (11) abutting between the second abutment surface (14) and the rod lumen (7).

7. A safe-to-use intratumoral turbulence device according to claim 6, characterized in that said detachment head (3) is cylindrical, the two cylindrical end faces of the detachment head (3) forming a first abutment surface (13) and a second abutment surface (14), respectively, the detachment hole (9) passing through the first abutment surface (13) and the second abutment surface (14).

8. A safe-to-use intratumoral turbulence device according to claim 5, characterized in that the proximal ends of said first and second wire segments (10, 11) are in abutment with the safety lumen (8).

9. A safe-to-use intratumoral spoiler device according to claim 1, characterized in that the spoiler network (6) is a spherical single-layer network, the far end of the spoiler network (6) is provided with a far-end developing ring, the near end of the spoiler network (6) is provided with a near-end developing ring, and the near-end developing ring connects and fixes the spoiler network (6) and the far end of the release member.

10. A safe-to-use intratumoral spoiler device according to claim 1, characterized in that the spoiler network (6) is a tapered double-layer network formed by folding back a single-layer network along its central position in the axial direction, and the proximal end of the spoiler network (6) is provided with a proximal developing ring connecting and fixing the spoiler network (6) and the distal end of the release member.