CN218792468U - Split type ablation needle and cryoablation puncture system - Google Patents

Abstract

The application provides a split type ablation needle and a cryoablation puncture system, wherein the split type ablation needle is connected with cryoablation equipment and is provided with a needle head, and the needle head is arranged at the far end of the split type ablation needle; the body, its connection this syringe needle, and the inside of this body is equipped with: the second channel is used for conveying the medium to the needle head and conveying the medium returned from the needle head respectively; the heat insulation structure circumferentially surrounds the outer part of the second channel; a second type of joint comprising: a second connecting member; the second cavity is internally provided with two third channels which are respectively communicated with the second channels; the second connecting piece is matched with the first connecting piece, and the second connecting piece can be assembled with or disassembled from the first connecting piece. The split type needle that melts of this application can be with split type needle and the cryoablation equipment of melting of detaching, only use split type melt the needle puncture can, reduced split type needle afterbody weight that melts to the influence of puncture process.

Description

Split type ablation needle and cryoablation puncture system

Technical Field

The embodiment of the application relates to the technical field of medical equipment, in particular to a split type ablation needle and a cryoablation puncture system comprising the same.

Background

With the continuous development and maturity of medical influence technologies such as nuclear magnetic resonance imaging and ultrasonic imaging, minimally invasive operations such as low-temperature cryotherapy and heating ablation therapy of tumors have been developed.

The multimode thermal physical therapy with the accurate control of the liquid nitrogen freezing and radio frequency heating processes can overcome the defects of single cold and single thermal therapy, improve the cure rate of tumors and protect normal tissues from being damaged, thereby becoming a hot direction for the research of the tumor thermal physical therapy.

There are two main working principles of cryotherapy in multi-modal therapy, one of which is based on the gas throttling effect, the joule thompson principle. For this type of cryoprobe, because high-pressure, ambient temperature gas is delivered, it is generally not necessary to consider the thermal insulation properties of the tubing, but rather the pressure resistance properties of the tubing and fittings. The other method is to convey low-temperature refrigerant such as liquid nitrogen to the needle head part and take away the heat of the tissue by the phase-change heat exchange principle. For the probe of the type, because a low-temperature medium is conveyed, the heat insulation characteristic of the pipeline needs to be considered, and the phenomena of low cooling speed, frosting and condensation on the outer surface of the pipeline and the like caused by obvious heat leakage are prevented.

The existing cryoablation needle is generally of an integrated structure and comprises a needle head part and a needle tail pipeline part, wherein the needle head part is used for directly acting on a human body, and the needle tail pipeline part is used for being connected with host equipment for cryoablation operation. Especially for the cryoprobe based on the phase change heat exchange principle, in order to increase the heat insulation of the pipeline, the pipeline part at the needle tail is usually designed into a vacuum heat insulation form, the vacuum connecting pipeline is thick and heavy, the bending and shaping performance is poor, the cryoprobe is combined with the needle head, the puncture is not convenient for a doctor, and larger stress can be formed. When the probe is punctured in place, the weight of a needle tail pipeline can cause the positioning deviation of the probe, support equipment must be adopted for assistance, and the operation process is complicated.

Accordingly, there is a need for a split ablation needle that reduces the stress pull of the physician during the puncture procedure.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application provides a split ablation needle and a cryoablation puncture system including the same to overcome or at least partially solve the above problems.

The embodiment of the application provides a split type ablation needle, it is connected with cryoablation equipment, and it is equipped with first type and connects, and this first type connects and has first connecting piece and first cavity, is equipped with two first passageways in this first cavity, and inside this cryoablation equipment of this two first passageways intercommunication respectively for with the inside medium output and the input of this cryoablation equipment, this split type ablation needle includes: the needle head is arranged at the distal end of the split type ablation needle; the body, its connection this syringe needle, and the inside of this body is equipped with: the second channel is used for conveying the medium to the needle head and conveying the medium returned from the needle head respectively; the heat insulation structure circumferentially surrounds the outer part of the second channel; a second type of joint comprising: a second connecting member; the second cavity is internally provided with two third channels which are respectively communicated with the second channels; the second connecting piece is matched with the first connecting piece, the second connecting piece can be assembled with or disassembled from the first connecting piece, when the second connecting piece is assembled with the first connecting piece, the second type joint and the first type joint form a sealing structure, and the two third channels are respectively communicated with the two first channels.

Optionally, the second channel comprises: a first air inlet channel for conveying a medium to the needle; the first air return channel is sleeved outside the first air inlet channel and used for conveying the medium returned from the needle head; a second intake passage communicating with the first intake passage; a second air return passage communicating with the first air return passage; the second air inlet channel and the second air return channel penetrate through the interior of the pipe body in parallel and are made of flexible materials.

Optionally, the thermal insulation structure comprises: the sealing assembly is arranged between the outer wall of the first air return channel and the inner wall of the pipe body, and forms an insulating area with the proximal ends of the first air inlet channel and the first air return channel; the first flexible sleeve is sleeved outside the second air inlet channel and the second air return channel, and a first heat insulation layer is formed between the first flexible sleeve and the second air inlet channel as well as the second air return channel; the pipe body is provided with a flexible part which is sleeved outside the first flexible sleeve to form a second heat insulation layer with the first flexible sleeve.

Optionally, the cryoablation apparatus is further provided with a first butt-joint and a first type transition piece, the first butt-joint and the first type transition piece forming a first tubular structure, the first cavity extending through the first tubular structure; the second type joint is also provided with a second type transition piece, the second connecting piece and the second type transition piece form a second tubular structure, and the second cavity penetrates through the second tubular structure; the first type transition piece and the first butt joint part can be connected in a matched mode, the flexible part is further provided with a third connecting piece, the first type joint further comprises a first heat insulation structure, the first heat insulation structure is wrapped around the two first channels from the outside and is arranged between the first tubular structure and the two first channels; the second type of joint further comprises a second insulating structure externally surrounding the second third channel and being arranged between the second tubular structure and the second third channel; the second type transition piece and the third connecting piece can be connected in a matched mode, so that the two third channels are respectively communicated with the two second channels.

Optionally, the third connector comprises: a first tubular connecting portion extending radially inwardly from the flexible portion; a second tubular connecting portion extending from the first tubular connecting portion to one end in a direction parallel to the axial direction, the second tubular connecting portion being adapted to the second type transition piece.

Optionally, the second type transition piece comprises: a tubular receiving portion for receiving the second third channel and/or the second channel; the tubular adapting part is connected with the tubular bearing part, and the outer diameter of the tubular adapting part is less than or equal to the inner diameter of the second tubular connecting part, so that the tubular adapting part is arranged in the second tubular connecting part in a penetrating way.

Optionally, a first locking member and a second locking member are circumferentially arranged on the outside of the second tubular connecting portion, and the first locking member and the second locking member are cooperatively connected to apply a locking force along the outer periphery of the tubular adapting portion to form a tight fit of the second tubular connecting portion and the tubular adapting portion.

Optionally, the split ablation needle further comprises a connecting line, the connecting line comprising: a second fourth channel; the second flexible sleeve is sleeved outside the fourth channel, and a third heat insulation layer is formed between the second flexible sleeve and the fourth channel; the third flexible sleeve is sleeved outside the second flexible sleeve to form a fourth heat insulation layer with the second flexible sleeve, and a first type transition piece and a second type transition piece are respectively arranged at two ends of the third flexible sleeve; a first type of joint; a second type of joint; the first type connector and the second type connector are respectively connected with the first type transition piece and the second type transition piece, the first type connector of the connecting pipeline is used for being assembled with or disassembled from the second type connector of the split type ablation needle, the second type connector of the connecting pipeline is used for being assembled with or disassembled from the first type connector of the cryoablation equipment, and when the first type connector of the connecting pipeline is assembled with the second type connector of the split type ablation needle, the two fourth channels are communicated with the two third channels; the second fourth channel communicates with the second first channel when the second type of fitting of the connecting line is assembled with the first type of fitting of the cryoablation apparatus.

The first type of joint, the second type of joint, the first type of transition piece, the second type of transition piece may all be standard structures, i.e. the structures described above for the different components may all be the same.

Optionally, the first connector has a hollow cavity, and the second connector has a protrusion matching with the cavity, and the protrusion can be inserted into the cavity.

Optionally, the first connecting member and the second connecting member are further provided with a engaging member and a groove, respectively, and when the protrusion is inserted into the cavity, the engaging member and the groove of the first connecting member and the second connecting member are engaged with each other.

Optionally, the first connector is connected to the second connector by a screw thread.

Optionally, a tubular expansion portion is disposed at a joint of the first air return channel and the second air return channel, a diameter of the tubular expansion portion is larger than a diameter of the first air return channel, and the tubular expansion portion has a hollow inner cavity which is respectively communicated with the first air return channel and the second air return channel.

Optionally, the split ablation needle further comprises a radio frequency wire connected to the needle head for radio frequency treatment, the radio frequency wire comprising: a radio frequency signal transmission line; a temperature signal transmission line; the anti-radiation insulating layer circumferentially covers the radio frequency signal transmission line and the temperature signal transmission line; and the flexible cable circumferentially covers the anti-radiation insulating layer.

Optionally, the outer surface of the portion of the tube body corresponding to the adiabatic region is coated with an electrically insulating material.

Optionally, the outer diameter of the first and second coiled casing is between 8-12mm and the outer diameter of the flexible portion and the third coiled casing is between 40-100 mm.

The present application further provides in another aspect a cryoablation puncture system comprising: the split type ablation needle; the cryoablation device is provided with a first type connector, the cryoablation device is provided with a body, two first channels and a first connecting piece, the two first channels are arranged inside the body, the two first channels are respectively communicated with the inside of the cryoablation device and used for outputting and recycling media inside the cryoablation device, and the first type connector is used for being assembled with or detached from a second type connector of the split type ablation needle.

According to the technical scheme, the split type ablation needle can be detached from the cryoablation device due to the fact that the split type ablation needle and the cryoablation device can be assembled or detached, when an operator, such as a doctor, punctures, the split type ablation needle and the cryoablation device can be detached, only the split type ablation needle is used for puncturing, the influence of the tail weight of the split type ablation needle on the puncturing process is reduced, the puncturing is finished, and then the split type ablation needle and the cryoablation device are assembled together to conduct cryoablation treatment.

In addition, the flexible extension section of split type ablation needle in this application embodiment is the flexible heat insulating pipeline of non-vacuum formula, when guaranteeing certain adiabatic effect, pipeline surface frost condensation phenomenon does not appear, has realized the flexible pipeline design, is convenient for carry out the bending and stereotypes, and the quality very reduces than the vacuum pipeline, has significantly reduced because the problem of the heavier syringe needle location skew that arouses of split type ablation needle's afterbody pipeline weight.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the drawings.

FIGS. 1A-1B are perspective and cross-sectional views, respectively, of one embodiment of a split ablation needle of the present application;

FIG. 1C is a schematic view of an embodiment of a cryoablation puncture system of the present application;

FIG. 2 is a cross-sectional view of an embodiment of a penetrating segment portion of a split ablation needle of the present application;

FIG. 3 is a perspective view of an embodiment of a first tubular structure of a split ablation needle of the present application;

FIG. 4 is a perspective view of the connection of a first tubular structure and a flexible extension of a split ablation needle of the present application;

FIG. 5 is a partially schematic illustration of a flexible extension of a split ablation needle of the present application;

FIG. 6 is an exploded view of the flexible extension of a split ablation needle of the present application interfacing with a second type of fitting;

FIG. 7 is a cross-sectional view of one embodiment of a connecting line of a split ablation needle of the present application;

FIGS. 8A-8B are perspective and cross-sectional views, respectively, of an embodiment of a split ablation needle of the present application including a connecting line;

fig. 9 is a cross-sectional view of an embodiment of a split ablation needle of the present application with rf wire.

Element number

10: a split type ablation needle; 20: a cryoablation device; 30. 148: a first type of joint; 31. 146: a first type transition piece; 32: a first channel; 33: a first connecting member; 34: a first tubular structure; 111: a needle head; 112: a pipe body; 112a: a puncture section pipe body; 112a-1: a needle body portion; 112a-2: a grip portion; 112b: a flexible portion; 113-1: a first air intake passage; 114-1: a first air return passage; 113-2: a second intake passage; 114-2: a second air return passage; 115: a seal assembly; 121: a second channel; 122: a first flexible sleeve; 13. 149: a second type of joint; 131. 147: a second type of transition piece; 132: a second connecting member; 133: a second tubular structure; 134: a third channel; 21: a first mating portion; 126: a third connecting member; 35: a first thermal insulation structure; 135: a second insulating structure; 1261: a first tubular connecting portion; 1262: a second tubular connecting portion; 1311: a tubular receiving portion; 1312: a tubular fitting portion; 1313 a connecting part; 127: a first locking member; 128: a second locking member; 14: connecting a pipeline; 141: a fourth channel; 142: a second coiled casing; 143: a third coiled casing; 1321: a cavity; 331: a protrusion; 332: a fastener; 1322: a groove; 15: a tubular expansion portion; 151: an inner cavity; 152: a connecting pipe; 116: a radio frequency line.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application shall fall within the scope of protection of the embodiments in the present application.

The term "coupled" includes direct coupling and indirect coupling. The term "communication" includes both direct communication and indirect communication.

The near end refers to one end close to the human body when an operator punctures the human body by using the split type ablation needle; the far end refers to the end far away from the human body when an operator punctures the human body by using the split ablation.

The term "fittable connection" includes nesting, snapping, locking, or any other suitable means for fixedly connecting two structures.

The following further describes specific implementations of embodiments of the present application with reference to the drawings of the embodiments of the present application.

Referring to fig. 1A to 8, in a specific implementation of the present application, a split-type ablation needle 10 is provided, which is connected to a cryoablation apparatus 20, the cryoablation apparatus 20 is provided with a first type connector 30, the first type connector 30 has a first connecting member 33 and a first cavity, the first cavity is provided with two first passages 32, in another embodiment, the first type connector 30 includes a first connecting portion, a first type transition member 31, two first passages 32 and a first connecting member 33, wherein the first type transition member 31 is connected to the first connecting member 33 to form a first tubular structure 34, the two first passages 32 are provided inside the first tubular structure 34, and the two first passages 32 are respectively communicated with the inside of the cryoablation apparatus 20 for outputting and inputting a medium inside the cryoablation apparatus 20.

The split type ablation needle 10 includes: a needle 111 disposed at the distal end of the split ablation needle 10; a tube 112 connected to the needle, and inside of the tube: a second channel 121 for delivering media to and from the needle, respectively; an insulating structure circumferentially surrounding the outside of the second channel 121; a second type of joint 13 having a second connecting member 132 and a second cavity, the second cavity having two third passages 134 therein, the two third passages 134 being respectively communicated with the two second passages 121, in another embodiment, the second type of joint 13 includes: a second type transition piece 131; a second connection 132 forming a second tubular structure 133 with the second type transition piece 131; two third channels 134, which are disposed inside the second tubular structure 133 and are respectively communicated with the two second channels 121; the second connecting member 132 is matched with the first connecting member 33, the second connecting member 132 can be assembled with or disassembled from the first connecting member 33, when the second connecting member 132 is assembled with the first connecting member 33, the second type joint 13 and the first type joint 30 form a sealing structure, and the two third passages 134 are respectively communicated with the two first passages 32. The tube 112 may be provided with a piercing section tube 112a and a flexible portion 112b, and the piercing section tube 112a may be harder than the flexible portion 112b to facilitate the piercing operation. The piercing section tube 112a may further comprise a needle body portion 112a-1 and a holding portion 112a-2, wherein the needle body portion 112a-1 is connected with the needle 111, and the holding portion 112a-2 is convenient for an operator to hold for performing a piercing operation. In the puncturing operation, needle 111 or needle 111 and a part of needle body part 112a-1 can be punctured into the human body as necessary.

In one embodiment, the second channel includes a piercing section channel and a flexible section channel, the piercing section channel is disposed through the piercing section tube 112a, the flexible section channel is disposed through the flexible portion 112b: the puncture section channel comprises a first air inlet channel 113-1 and a first air return channel, wherein the first air inlet channel 113-1 is used for conveying a medium to the needle head; the first air return channel 114-1 is sleeved outside the first air inlet channel 113-1 and used for conveying the medium returned from the needle head; the flexible section channel comprises a second air inlet channel and a second air return channel, wherein the second air inlet channel is communicated with the first air inlet channel 113-1; the second air return passage is communicated with the first air return passage 114-1; the second air inlet channel and the second air return channel are disposed in parallel inside the tube 112 and are made of flexible material.

In an embodiment, the heat insulation structure may include a piercing section heat insulation structure provided to the piercing section pipe body 112a and a flexible section heat insulation structure provided to the flexible portion 112b: wherein, the insulation structure of the piercing section comprises a sealing component, the sealing component is arranged between the outer wall of the first air return channel 114-1 and the inner wall of the tube body 112, and forms an insulation region with the proximal ends of the first air inlet channel 113-1 and the first air return channel 114-1; the flexible segment insulating structure includes a first flexible sleeve and a flexible portion of the pipe body 112: the first flexible sleeve is sleeved outside the second air inlet channel and the second air return channel, and a first heat insulation layer is formed between the first flexible sleeve and the second air inlet channel as well as between the first flexible sleeve and the second air return channel; the flexible part is sleeved outside the first flexible sleeve to form a second heat insulation layer with the first flexible sleeve.

The split type ablation needle 10 in the embodiment of the application can be assembled or disassembled with the cryoablation device 20, so that when an operator, for example, a doctor punctures, the split type ablation needle 10 and the cryoablation device 20 can be disassembled, only the split type ablation needle 10 is used for puncturing, the influence of the weight of the tail of the split type ablation needle 10 on the puncturing process is reduced, the puncturing is finished, and then the split type ablation needle 10 and the cryoablation device 20 are assembled together for cryoablation treatment.

In addition, the flexible portion 112b of split type ablation needle 10 in this application embodiment is the flexible heat insulating pipeline of non-vacuum formula, when guaranteeing certain adiabatic effect, pipeline surface frost condensation phenomenon does not appear, has realized the flexible pipeline design, is convenient for carry out the bending and stereotypes, and the quality very reduces than the vacuum pipeline, has significantly reduced because split type ablation needle 10's afterbody pipeline weight is the problem of the syringe needle 111 positioning deviation that arouses than heavy.

In one embodiment of the present application, the cryoablation apparatus 20 is further provided with a first docking portion 21, the flexible portion 112b is further provided with a third connecting member 126, and the structure of the first docking portion 21 may be symmetrical to the structure of the third connecting member 126. The first-type transition piece 31 is mateably connected with the first butt portion 21, and the first-type joint 30 may further include a first insulating structure 35 externally surrounding the second first passage 32 and disposed between the first tubular structure 34 and the second first passage 32; the second type of joint 13 may also comprise a second insulating structure 135, which externally surrounds the second third channel 134 and is provided between the second tubular structure 133 and the second third channel 134; the second type transition piece 131 and the third connecting piece 126 can be connected in a matching way, so that the second third channel 134 is respectively communicated with the second channel 121. Through the design of first thermal insulation structure 35 and the adiabatic structure 135 of second, when first type connects 30 and the butt joint back of second type and can form seal structure, has realized adiabatic effect, alleviates the frosting condensation phenomenon that the pipeline surface appears greatly.

In an embodiment of the present application, the third connecting member 126 includes: a first tubular connecting portion 1261 extending radially inwardly from the flexible portion 124; a second tubular connecting portion 1262 extending from the first tubular connecting portion 1261 towards one end in a direction parallel to the axial direction, the second tubular connecting portion 1262 being adapted to the second type transition piece 131.

In an embodiment of the present application, the second type transition piece 131 includes: a tubular receptacle 1311 for receiving the second third channel 134 and/or the second channel 121; and a tubular fitting portion 1312 connected to the tubular receiving portion 1311, the tubular fitting portion 1312 having an outer diameter smaller than or equal to an inner diameter of the second tubular connecting portion 1262 such that the tubular fitting portion 1312 is inserted into the second tubular connecting portion 1262. The structure of the first type transition piece 31 and the second type transition piece 131 may be designed symmetrically and will not be described in detail herein. The above-mentioned structure of the third connecting member 126 and the second type transition member 131 can improve the sealing performance of the connection therebetween, and can effectively support the smooth butt joint of the third channel 134 and the second channel 121.

In one embodiment of the present application, the first locking member 127 and the second locking member 128 are circumferentially disposed on the exterior of the second tubular connecting portion 1262, and the first locking member 127 and the second locking member 128 can be cooperatively connected to apply a locking force along the outer periphery of the tubular fitting portion 1312 to form the second tubular connecting portion 1262 into a tight fit with the tubular fitting portion 1312.

In one embodiment of the present application, the divided ablation needle 10 further includes a connection line 14, and the connection line 14 includes: two fourth channels 141; a second flexible sleeve 142 sleeved outside the fourth channel 141, and a third thermal insulation layer is formed between the second flexible sleeve 142 and the fourth channel 141; a third flexible sleeve 143, which is sleeved outside the second flexible sleeve 142 to form a fourth thermal insulation layer with the second flexible sleeve 142, wherein a first type transition piece 146 and a second type transition piece 147 are respectively arranged at two ends of the third flexible sleeve 143; a first type joint 148; a second type of joint 149; wherein the first type of connector 148 and the second type of connector 149 are connected to the first type of transition piece 146 and the second type of transition piece 147, respectively, and the first type of connector 148 of the connecting line 14 is used for assembling or disassembling with the second type of connector 149 of the split-type ablation needle 10, the second type of connector 149 of the connecting line 14 is used for assembling or disassembling with the first type of connector 148 of the cryoablation apparatus 20, and when the first type of connector 148 of the connecting line 14 is assembled with the second type of connector 149 of the split-type ablation needle 10, the second fourth channel 141 is communicated with the second third channel 134; when the second type of connector 149 of the connecting line 14 is assembled with the first type of connector 30 of the cryoablation device 20, the second fourth channel 141 communicates with the second first channel 32. The length of the pipeline part of the split-type ablation needle 10 can be increased by the design of the connecting pipeline 14, and the connecting pipeline 14 and the needle part (except the part of the connecting pipeline 14) of the split-type ablation needle 10 can be assembled or disassembled, so when the cryoablation device 20 is far away from Shi Zhenbu of a patient to be treated or is inconvenient, the connecting pipeline 14 can be firstly connected to the cryoablation device 20, meanwhile, the connecting pipeline 14 and the needle part of the split-type ablation needle 10 are disassembled, and the needle part and the connecting pipeline 14 can be assembled into a whole after a doctor finishes puncturing.

In one embodiment of the present application, the first connector 33 has a hollow cavity 1321, the second connector 132 has a protrusion 331 matching with the cavity 1321, and the protrusion 331 can be inserted into the cavity 1321. The first connecting member 33 and the second connecting member 132 may be fixed in various manners. In an embodiment of the present application, the first connecting element 33 and the second connecting element 132 are further provided with a latch 332 and a groove 1322, respectively, and when the protrusion 331 is inserted into the cavity 1321, the first connecting element 33 is latched with the latch 332 and the groove 1322 of the second connecting element 132. In another embodiment, the first connector 33 is threadedly coupled to the second connector 132. The first connecting member 33 and the second connecting member 132 may be fixed by any other suitable fixing means. The second type transition piece 147 and the second connecting member 132 can be connected in various ways, for example, the second type transition piece 147 is provided with a connecting portion 1313, the connecting portion 1313 is provided with an internal thread, the second connecting member 132 is provided with an external thread, and the second type transition piece 147 is connected with the second connecting member 132 through a thread, but the connection way of the second type transition piece 147 and the second connecting member 132 is not limited to this, and any other suitable connection way can be adopted.

In an embodiment of the present application, a tubular expansion portion 15 is disposed at a connection point of the first return air channel 114-1 and the second return air channel 114-2, a diameter of the tubular expansion portion 15 is larger than a diameter of the first return air channel 114-1, the tubular expansion portion 15 has a hollow inner cavity 151, the inner cavity 151 is respectively communicated with one of the first return air channel 114-1 and the second return air channel 121, for example, the inner cavity 151 is communicated with one of the second return air channel 121 through a connecting tube 152. The tubular expansion 15 can facilitate the physician to hold the needle portion by hand, prevent the needle portion from sliding off due to the small diameter of the needle portion during the puncturing procedure, and facilitate the communication between the first air-return channel 114-1 and the second channel 121.

In an embodiment of the present application, the split ablation needle 10 further comprises a radio frequency wire 116 connected to the needle tip 111 for radio frequency therapy, the radio frequency wire 116 comprises: a radio frequency signal transmission line; a temperature signal transmission line; the anti-radiation insulating layer circumferentially covers the radio frequency signal transmission line and the temperature signal transmission line; and the flexible cable is circumferentially wrapped by the anti-radiation insulating layer and used for protecting the anti-radiation insulating layer and the transmission line inside the anti-radiation insulating layer.

In one embodiment of the present application, the outer surface of the portion of the tube 112 corresponding to the thermal insulation region is coated with an electrically insulating material to prevent electrical leakage. Alternatively, the outer diameters of the first and second coiled casings 122 and 142 are between 8-12mm, and the outer diameters of the flexible portion 124 and the third coiled casing 143 are between 40-100 mm. The second channel 121 and the fourth channel 141 may be made of stainless steel 304, PU polyurethane or other suitable materials, and the first flexible sleeve 122, the flexible portion 124, the second flexible sleeve 142 and the third flexible sleeve 143 may be made of PVC, PE or other suitable materials. For the connection between the second channel 121 and the second third channel 134, between the second third channel 134 and the second first channel 32, and between the second third channel 134 and the second fourth channel 141, reference may be made to chinese patent application No. cn202122838478.X.

The present application further provides a cryoablation puncture system, the puncture system comprising: the above-described split type ablation needle 10; the cryoablation device 20 is provided with a first type connector 30, the cryoablation device is provided with a body, two first channels 32 and a first connecting piece 33, the two first channels 32 are arranged in the body and are respectively communicated with the interior of the cryoablation device 20 for outputting and recovering media in the interior of the cryoablation device 20, and the first type connector 30 is used for being assembled with or disassembled from a second type connector 13 of the split-type ablation needle 10. The operation principle is described in detail above and will not be described herein again.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (16)

1. The utility model provides a split type ablation needle, its is connected with cryoablation equipment, and this cryoablation equipment is equipped with first type and connects, and this first type connects and has first connecting piece and first cavity, is equipped with two first passageways in this first cavity, and inside this cryoablation equipment of this intercommunication respectively of these two first passageways for with the inside medium output and the input of this cryoablation equipment, its characterized in that, this split type ablation needle includes:

the needle head is arranged at the distal end of the split type ablation needle;

the body, its connection this syringe needle, and the inside of this body is equipped with:

the second channel is used for conveying the medium to the needle head and conveying the medium returned from the needle head respectively;

the heat insulation structure circumferentially surrounds the outer part of the second channel;

a second type of joint comprising:

a second connecting member;

the second cavity is internally provided with two third channels which are respectively communicated with the second channels; the second connecting piece is matched with the first connecting piece, the second connecting piece can be assembled with or disassembled from the first connecting piece, when the second connecting piece is assembled with the first connecting piece, the second type joint and the first type joint form a sealing structure, and the two third channels are respectively communicated with the two first channels.

2. The split ablation needle of claim 1, wherein the second channel comprises:

a first air inlet channel for conveying a medium to the needle;

the first air return channel is sleeved outside the first air inlet channel and used for conveying the medium returned from the needle head;

a second intake passage communicating with the first intake passage;

a second air return passage communicating with the first air return passage;

the second air inlet channel and the second air return channel penetrate through the interior of the pipe body in parallel and are made of flexible materials.

3. The split ablation needle of claim 2, wherein the insulating structure comprises:

the sealing assembly is arranged between the outer wall of the first air return channel and the inner wall of the pipe body, and forms an insulating area with the proximal ends of the first air inlet channel and the first air return channel;

the first flexible sleeve is sleeved outside the second air inlet channel and the second air return channel, and a first heat insulation layer is formed between the first flexible sleeve and the second air inlet channel as well as between the first flexible sleeve and the second air return channel;

the pipe body is provided with a flexible part which is sleeved outside the first flexible sleeve to form a second heat insulation layer with the first flexible sleeve.

4. The split ablation needle of claim 3, wherein the cryoablation apparatus further comprises a first butt portion and a first type transition piece, the first type transition piece is cooperatively connected with the first butt portion, the first connection piece and the first type transition piece form a first tubular structure, and the first cavity extends through the first tubular structure;

the second type joint is also provided with a second type transition piece, the second connecting piece and the second type transition piece form a second tubular structure, and the second cavity penetrates through the second tubular structure;

the flexible portion is further provided with a third connecting member, wherein,

the first type joint further comprises a first insulating structure externally surrounding the two first channels and disposed between the first tubular structure and the two first channels;

the second type of joint further comprises a second insulating structure externally surrounding the second third channel and provided between the second tubular structure and the second third channel;

the second type transition piece and the third connecting piece can be connected in a matched mode, so that the two third channels are respectively communicated with the two second channels.

5. The split ablation needle of claim 4, wherein the third connector comprises:

a first tubular connecting portion extending radially inwardly from the flexible portion;

a second tubular connecting portion extending from the first tubular connecting portion to one end in a direction parallel to the axial direction, the second tubular connecting portion being adapted to the second type transition piece.

6. The split ablation needle of claim 5, wherein the second type of transition piece comprises:

a tubular receiving portion for receiving the second third channel and/or the second channel;

the tubular adapting part is connected with the tubular bearing part, and the outer diameter of the tubular adapting part is less than or equal to the inner diameter of the second tubular connecting part, so that the tubular adapting part is arranged in the second tubular connecting part in a penetrating way.

7. The split ablation needle of claim 6, wherein the second tubular connecting portion has a first locking member and a second locking member disposed circumferentially on an exterior thereof, the first locking member and the second locking member being cooperatively coupled to apply a locking force along an outer circumference of the tubular fitting portion to bring the second tubular connecting portion into close engagement with the tubular fitting portion.

8. The split ablation needle of claim 4, further comprising a connection line, the connection line comprising:

two fourth channels;

the second flexible sleeve is sleeved outside the fourth channel, and a third heat insulation layer is formed between the second flexible sleeve and the fourth channel;

the third flexible sleeve is sleeved outside the second flexible sleeve to form a fourth heat insulation layer with the second flexible sleeve, and a first type transition piece and a second type transition piece are respectively arranged at two ends of the third flexible sleeve;

a first type of joint;

a second type of joint;

the first type connector and the second type connector are respectively connected with the first type transition piece and the second type transition piece, the first type connector of the connecting pipeline is used for being assembled with or disassembled from the second type connector of the split type ablation needle, the second type connector of the connecting pipeline is used for being assembled with or disassembled from the first type connector of the cryoablation equipment, and when the first type connector of the connecting pipeline is assembled with the second type connector of the split type ablation needle, the two fourth channels are communicated with the two third channels; the second fourth channel communicates with the second first channel when the second type of fitting of the connecting line is assembled with the first type of fitting of the cryoablation apparatus.

9. The split ablation needle of claim 1, wherein the first connector has a hollow cavity and the second connector has a protrusion that mates with the cavity, the protrusion being insertable into the cavity.

10. The detachable ablation needle of claim 9, wherein the first connecting member and the second connecting member are further provided with a locking member and a groove, respectively, and when the protrusion is inserted into the cavity, the locking member and the groove of the first connecting member and the second connecting member are locked together.

11. The split ablation needle of claim 9, wherein the first connector is threadably connected to the second connector.

12. The detachable ablation needle of claim 2, wherein a tubular expansion portion is disposed at the connection between the first and second return air channels, the diameter of the tubular expansion portion is larger than that of the first return air channel, and the tubular expansion portion has a hollow inner cavity, and the inner cavity is respectively communicated with the first and second return air channels.

13. The split ablation needle of claim 1, further comprising a radio frequency wire connected to the needle head for radio frequency treatment, the radio frequency wire comprising:

a radio frequency signal transmission line;

a temperature signal transmission line;

the anti-radiation insulating layer circumferentially coats the radio frequency signal transmission line and the temperature signal transmission line;

and the flexible cable circumferentially covers the anti-radiation insulating layer.

14. The split-type ablation needle of claim 1, wherein the outer surface of the portion of the tubular body corresponding to the adiabatic region is coated with an electrically insulating material.

15. The split ablation needle of claim 8, wherein the outer diameters of the first and second flexible sleeves are between 8-12mm, and the outer diameters of the flexible portion and the third flexible sleeve are between 40-100 mm.

16. A cryoablation puncture system, the puncture system comprising:

the split ablation needle of any one of claims 1 to 15;

the cryoablation device is provided with a first type connector, the cryoablation device is provided with a body, two first channels and a first connecting piece, the two first channels are arranged in the body and are respectively communicated with the interior of the cryoablation device for outputting and recycling media in the cryoablation device, and the first type connector is used for being assembled with or detached from the second type connector of the split type ablation needle.

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