CN212755827U

CN212755827U - Coaxial puncture needle set

Info

Publication number: CN212755827U
Application number: CN202020599059.8U
Authority: CN
Inventors: 张影清
Original assignee: First Hospital of Jiaxing
Current assignee: First Hospital of Jiaxing
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2021-03-23
Anticipated expiration: 2030-04-20

Abstract

The utility model provides a coaxial pjncture needle external member includes: the needle comprises a hollow outer sleeve needle, a sealing needle core, a biopsy sampling needle and a radio frequency ablation needle; the biopsy sampling needle comprises a biopsy positioning base and a biopsy needle core, wherein a biopsy sampling groove is formed in the needle tip end of the biopsy needle core; the radio frequency ablation needle comprises a radio frequency ablation base and a radio frequency ablation needle core, wherein the needle tip of the radio frequency ablation needle is a radio frequency heating needle head, the radio frequency ablation needle replaces a sealing needle core to be inserted into the hollow outer trocar when in use, the needle tip of the radio frequency ablation needle core extends out to execute radio frequency ablation, and after the radio frequency ablation is finished, the needle tip of the radio frequency ablation needle core can retract into the needle tube of the outer trocar.

Description

Coaxial puncture needle set

Technical Field

The utility model relates to the field of medical supplies, concretely relates to coaxial pjncture needle external member.

Background

With the continuous development of medical science and technology, tumor puncture and radiofrequency ablation interventional therapy under the guidance of CT or B-ultrasonic is more and more widely applied. At present, the most common treatment mode in clinic is to perform puncture biopsy on tumors, remove a puncture needle after puncture biopsy, and perform radiofrequency ablation by the radiofrequency ablation needle again. At present, no integrated coaxial needle combined with the two is available in the market, so that a treatment mode needs a clinician to perform two times of puncture in the same path, the operation time is prolonged, the operation difficulty is increased, more importantly, complications such as bleeding, pneumothorax and infection of a patient are increased, and the patient is greatly injured.

SUMMERY OF THE UTILITY MODEL

The utility model provides a coaxial pjncture needle external member has avoided puncture many times to cause the wound to the patient, has avoided the patient because the complication such as hemorrhage, pneumothorax, infection appear in puncture many times, can shorten the operation time, reduce the degree of difficulty and the complication of operation, better protection patient's safety.

The utility model provides a coaxial puncture needle kit, which comprises a hollow outer thimble needle and a sealing needle core which is accommodated in the needle tube of the outer thimble needle and is matched with the inner diameter of the outer thimble needle, and also comprises a biopsy sampling needle and a radio frequency ablation needle;

the biopsy sampling needle comprises a biopsy positioning base and a biopsy needle core, wherein a biopsy sampling groove is formed in the needle tip end of the biopsy needle core, a biopsy push rod is arranged at the tail end of the biopsy needle core, the biopsy positioning base is sleeved outside the biopsy needle core close to the biopsy push rod, a guide structure is arranged on the inner wall of the biopsy positioning base, and the biopsy needle core can move relative to the biopsy positioning base along the guide structure; when in use, the biopsy sampling needle is inserted into the outer trocar instead of the sealed needle core, the biopsy needle core is moved along the guide structure of the inner wall of the biopsy positioning base by operating the biopsy push rod, the needle tip of the biopsy needle core can be extended out from the head end of the outer trocar to carry out biopsy sampling, and the needle tip of the biopsy needle core can be retracted into the needle tube of the outer trocar by operating the biopsy push rod after sampling is finished;

the radio frequency ablation needle comprises a radio frequency ablation base and a radio frequency ablation needle core, wherein the needle tip of the radio frequency ablation needle core is a radio frequency heating needle head, an operating rod is arranged at the tail end of the radio frequency ablation needle core, and the radio frequency ablation base is sleeved outside the radio frequency ablation needle core close to the operating rod; when the radio frequency ablation needle is used, the radio frequency ablation needle is inserted into the hollow outer trocar instead of the sealing needle core, the needle tip of the radio frequency ablation needle core can extend out of the head end of the outer trocar by operating the operating rod to perform radio frequency ablation, and the needle tip of the radio frequency ablation needle core can retract into the needle tube of the outer trocar by operating the operating rod after the radio frequency ablation is finished.

Preferably, the head end of the outer trocar is used for penetrating into the body of a patient, the other end of the outer trocar is provided with an outer trocar positioning seat, the open end of the outer trocar positioning seat is provided with an accommodating groove, the bottom of the accommodating groove is provided with an insertion hole, and the tail end of the sealed stylet is provided with a stylet base; when the needle core is installed, the needle tip of the sealed needle core is inserted into the outer trocar through the insertion hole, and the needle core base is embedded into the accommodating groove of the outer trocar positioning seat for fixing.

Preferably, the outer trocar is sleeved with a protection ring which can be pulled up and down, and after the outer trocar is punctured into the body of a patient, the protection ring is manually pulled to be close to the skin of the patient, so that the outer trocar can be fixed to avoid displacement.

Preferably, the biopsy positioning base has a mounting hole formed therein for allowing the biopsy needle core to pass through, and the guide structure includes: the wall of the hole of the mounting hole is provided with a guide groove along the axial direction and a positioning groove along the radial direction, the positioning groove is communicated with the guide groove, the biopsy needle core is provided with a sliding block capable of sliding along the guide groove and the positioning groove, the sliding block can slide to the position of the positioning groove along the guide groove by pressing the biopsy push rod, the sliding block can slide into the positioning groove by rotating the biopsy push rod, and the needle tip of the biopsy needle core is used for sampling; after sampling, the biopsy push rod is rotated reversely to rotate the sliding block to the position of the guide groove along the positioning groove, and the sliding block can slide along the guide groove by pulling the biopsy push rod, so that the needle tip of the biopsy needle core retracts into the needle tube of the outer trocar.

Preferably, the guide slot is an arc-shaped slot, and pressing the biopsy push rod can enable the sliding block to slide along the guide slot, so that the biopsy needle core can be rotated and sampled while extending.

Preferably, a spring is arranged at the bottom of the mounting hole of the biopsy positioning base, the spring is fixed with the biopsy needle core, the spring is compressed and deformed when the biopsy push rod is pressed for sampling, and the spring recovers to deform after sampling to drive the biopsy needle core to return to an initial position.

Preferably, the radiofrequency ablation needle further comprises a radiofrequency ablation needle cylinder, and the radiofrequency ablation needle cylinder and the radiofrequency ablation base are fixedly sleeved outside the radiofrequency ablation needle core.

Preferably, the radio frequency heating needle is a straight needle or a claw-shaped needle, the radio frequency heating needle is accommodated in the radio frequency ablation needle cylinder, and the radio frequency heating needle can extend out of the radio frequency ablation needle cylinder by operating the operating rod.

Preferably, the biopsy positioning base is capable of being coaxially mounted with the outer trocar positioning seat when mounted by replacing the sealing stylet with the biopsy sampling needle into the barrel of the outer trocar; when the radiofrequency ablation needle is used for replacing the sealing needle core and is inserted into the hollow outer trocar for installation, the radiofrequency ablation base can be coaxially installed with the outer trocar positioning seat.

Preferably, the biopsy positioning base and the outer trocar positioning base are locked through a buckle structure or a spiral structure to complete coaxial installation, and the radiofrequency ablation base and the outer trocar positioning base are locked through a buckle structure or a spiral structure to complete coaxial installation.

The utility model provides a coaxial puncture needle kit, which comprises a hollow outer trocar for puncture, a sealed needle core, a biopsy sampling needle and a radio frequency ablation needle; after the outer trocar provided with the sealed needle core is punctured into an affected part of a patient, the sealed needle core is taken out and replaced by the biopsy sampling needle, the needle tip of the biopsy needle core can be enabled to extend out from the head end of the outer trocar by operating the biopsy push rod, the tip of the biopsy needle core is punctured into the affected part, a biopsy sampling groove arranged at the needle tip of the biopsy sampling needle can sample the affected part by rotating the biopsy sampling needle, the needle tip of the biopsy needle core can be retracted into the needle tube of the outer trocar by operating the biopsy push rod after sampling is finished, the biopsy sampling needle is pulled out to collect and inspect the obtained tissue sample of the affected part, and the sealed needle core is reinserted into the needle tube of the outer trocar or replaced by the radio frequency ablation needle; when the radiofrequency ablation needle needs to be used, the sealed needle core or the biopsy sampling needle is taken out and replaced by the radiofrequency ablation needle core, the needle tip of the radiofrequency ablation needle core can extend out of the head end of the outer trocar to enter the affected part of a patient by operating the operating rod, radiofrequency ablation operation can be carried out, after radiofrequency ablation is finished, the needle tip of the radiofrequency ablation needle core can retract into the needle tube of the outer trocar by operating the operating rod, the radiofrequency ablation needle core is taken out, the sealed needle core is installed in the needle tube of the outer trocar, and the radiofrequency ablation needle core and the outer trocar can be pulled out together if other operations are not needed; to the patient that needs carry out biopsy sample and radiofrequency ablation, only need use outer trocar carries out a puncture operation, changes sealed nook closing member does biopsy sample needle carries out biopsy sample operation, changes again biopsy sample needle does radiofrequency ablation needle carries out radiofrequency ablation operation, has avoided puncture many times to cause the wound to the patient, has avoided the patient because complications such as hemorrhage, pneumothorax, infection appear in the puncture many times, can shorten the operation time, reduce the degree of difficulty and the complication of operation, better protection patient's safety.

Other features and advantages of embodiments of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention, but do not constitute a limitation of the embodiments of the invention. In the drawings:

FIG. 1 is a schematic view of the installation of an outer trocar and a sealing core in a coaxial introducer needle assembly according to an embodiment of the present invention;

FIG. 2 is a schematic view of a biopsy needle of a coaxial needle assembly according to an embodiment of the present invention;

FIG. 3 is a schematic view of a biopsy positioning base of a biopsy sampling needle of a coaxial needle assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a rf ablation needle in a coaxial needle assembly according to an embodiment of the present invention.

Description of the reference numerals

1 outer thimble needle 101 outer thimble needle positioning seat

102 protection ring 2 sealing needle core

201 core base 3 biopsy sampling needle

301 biopsy needle core 302 biopsy positioning base

303 biopsy sampling groove 304 biopsy push rod

305 guide groove 306 positioning groove

307 sliding block 308 spring

4 radiofrequency ablation needle 401 radiofrequency ablation needle core

402 radio frequency ablation base 403 radio frequency heating needle

404 operating rod 405 radio frequency ablation syringe

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.

The technical solution in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1-4, the present invention provides a coaxial puncture needle kit, which comprises a hollow outer trocar 1 and a sealing needle core 2 accommodated in the needle tube of the outer trocar 1 and matching with the inner diameter of the outer trocar 1, and further comprises a biopsy sampling needle 3 and a radiofrequency ablation needle 4;

the biopsy sampling needle 3 comprises a biopsy positioning base 302 and a biopsy needle core 301, wherein the needle tip end of the biopsy needle core 301 is provided with a biopsy sampling groove 303, the end of the biopsy needle core 301 is provided with a biopsy push rod 304, the biopsy positioning base 302 is sleeved outside the biopsy needle core 301 close to the biopsy push rod 304, the inner wall of the biopsy positioning base 302 is provided with a guide structure, and the biopsy needle core 301 can move relative to the biopsy positioning base 302 along the guide structure; when in use, the biopsy sampling needle 3 is inserted into the outer trocar 1 in place of the sealed needle core 2, the biopsy needle core 301 is moved along the guide structure of the inner wall of the biopsy positioning base 302 by operating the biopsy push rod 304, the needle tip of the biopsy needle core 301 can be extended out from the head end of the outer trocar 1 for biopsy sampling, and the needle tip of the biopsy needle core 301 can be retracted into the needle tube of the outer trocar 1 by operating the biopsy push rod 304 after sampling is finished;

the radiofrequency ablation needle 4 comprises a radiofrequency ablation base 402 and a radiofrequency ablation needle core 401, the tip of the radiofrequency ablation needle is a radiofrequency heating needle 403, an operating rod 404 is arranged at the tail end of the radiofrequency ablation needle core 401, and the radiofrequency ablation base 402 is sleeved outside the radiofrequency ablation needle core 401 close to the operating rod 404; when in use, the radiofrequency ablation needle 4 is inserted into the hollow outer trocar 1 instead of the sealing needle core 2, the needle tip of the radiofrequency ablation needle core 401 can extend out from the head end of the outer trocar 1 by operating the operating rod 404 to perform radiofrequency ablation, and after the radiofrequency ablation is finished, the needle tip of the radiofrequency ablation needle core 401 can retract into the needle tube of the outer trocar 1 by operating the operating rod 404.

According to the technical scheme of the utility model, coaxial pjncture needle external member includes hollow outer trocar 1 and holds in outer trocar 1's the needle tube with the sealed nook closing member 2 that outer trocar 1 internal diameter matches, outer trocar 1 is used for the puncture to get into patient's affected part, will sealed nook closing member 2 inserts puncture in outer trocar 1's the needle tubing, can be right outer trocar 1's inner chamber seals, guarantees the security of puncture operation.

Coaxial pjncture needle external member still includes biopsy sampling needle 3 and radiofrequency ablation needle 4, to the patient that needs carry out biopsy sampling and radiofrequency ablation, only needs to use outer trocar 1 carries out a puncture operation, changes sealed nook closing member 2 does biopsy sampling needle 3 carries out biopsy sampling operation, changes again biopsy sampling needle 3 does radiofrequency ablation needle 4 carries out radiofrequency ablation operation, has avoided a lot of punctures to cause the wound to the patient, has avoided the patient to appear because many times puncture complications such as hemorrhage, pneumothorax, infection, can shorten the operating time, reduce the degree of difficulty and the complication of operation, better protection patient's safety.

According to an embodiment of the present invention, preferably, the head end of the outer trocar 1 is used for puncturing into the body of the patient, the other end is provided with an outer trocar positioning seat 101, the open end of the outer trocar positioning seat 101 is provided with a holding groove, the bottom of the holding groove is provided with an insertion hole, and the end of the sealed stylet 2 is provided with a stylet base 201; when the needle core is installed, the needle tip of the sealing needle core 2 is inserted into the outer trocar 1 through the insertion hole, and the needle core base 201 is embedded into the accommodating groove of the outer trocar positioning seat 101 for fixing, so that the sealing effect can be prevented from being influenced by the movement of the sealing needle core 2 in the operation process.

According to the utility model discloses an embodiment be provided with foraminiferous silica gel piece in the patchhole, sealed nook closing member 2 is followed the silica gel piece inserts in outer trocar 1's the needle tubing, strengthened sealed effect, with sealed nook closing member 2 extracts the in-process of replacing other nook closing members, the silica gel piece can play sealed outer trocar 1's effect.

According to the utility model discloses an embodiment, preferably, outer trocar 1 overcoat has the protection ring 102 that can stimulate from top to bottom, will outer trocar 1 puncture gets into patient's health after, the manual pulling protection ring 102 can be fixed to pasting tight patient's skin outer trocar 1 avoids taking place to shift, has guaranteed outer trocar 1 is in the security of puncture in-process.

According to the technical scheme of the utility model, biopsy sampling needle 3 includes biopsy location base 302 and the biopsy needle core 301 that the needle point end is provided with biopsy sampling groove 303, the end of biopsy needle core 301 is provided with biopsy push rod 304, biopsy location base 302 is close to the cover of biopsy push rod 304 is established outside biopsy needle core 301, biopsy location base 302 inner wall is provided with guide structure, biopsy needle core 301 can move along guide structure relative to biopsy location base 302; when in use, the biopsy sampling needle 3 is inserted into the outer trocar 1 in place of the sealing needle core 2, the biopsy needle core 301 is moved along the guide structure of the inner wall of the biopsy positioning base 302 by operating the biopsy push rod 304, the needle tip of the biopsy needle core 301 can be extended out from the head end of the outer trocar 1 for biopsy sampling, and the needle tip of the biopsy needle core 301 can be retracted into the needle tube of the outer trocar 1 by operating the biopsy push rod 304 after sampling is finished.

After the outer trocar 1 provided with the sealed needle core 2 is punctured into the affected part of the patient, the sealed needle core 2 is taken out and replaced by the biopsy sampling needle 3, by operating the biopsy push rod 304, the needle tip of the biopsy needle core 301 can be extended from the head end of the outer trocar 1, the tip of the biopsy needle core 301 is penetrated into the affected part, by rotating the biopsy sampling needle 3, the biopsy sampling groove 303 arranged at the needle tip of the biopsy sampling needle 3 can sample the affected part, after sampling is finished, the needle tip of the biopsy needle core 301 can be retracted into the needle tube of the outer trocar 1 by operating the biopsy push rod 304, the biopsy sampling needle 3 is pulled out to collect and inspect the obtained tissue sample of the affected part, and the sealing needle core 2 is reinserted into the needle tube of the outer trocar 1 or replaced by the radiofrequency ablation needle 4.

According to an embodiment of the present invention, preferably, the biopsy positioning base 302 has a mounting hole formed therein for allowing the biopsy needle core 301 to pass through, and the guiding structure includes: an axial guide groove 305 and a radial positioning groove 306 are arranged on the hole wall of the mounting hole, the positioning groove 306 is communicated with the guide groove 305, a sliding block 307 capable of sliding along the guide groove 305 and the positioning groove 306 is arranged on the biopsy needle core 301, the sliding block 307 can slide to the position of the positioning groove 306 along the guide groove 305 by pressing the biopsy push rod 304, the sliding block 307 can slide into the positioning groove 306 by rotating the biopsy push rod 304, and the needle tip of the biopsy needle core 301 is sampled; after sampling, the biopsy push rod 304 is rotated reversely to rotate the sliding block 307 to the position of the guide groove 305 along the positioning groove 306, and the sliding block 307 can slide along the guide groove 305 by pulling the biopsy push rod 304, so that the needle tip of the biopsy needle core 301 is retracted into the needle tube of the outer trocar 1.

By providing the guide structure in the biopsy positioning base 302, the biopsy needle core 301 is provided with a sliding block 307 which can slide along the guide groove 305 and the positioning groove 306, so that the axial moving distance of the biopsy needle core 301 can be limited; when the puncture is finished and the biopsy sampling is needed, the biopsy needle core 301 slides to the position of the positioning groove 306 along the guide groove 305 of the guide structure, the biopsy needle core 301 can be controlled to penetrate into the affected part with a preset depth, the slide block 307 can slide into the positioning groove 306 by rotating the biopsy push rod 304, the biopsy sampling groove 303 at the needle tip of the biopsy needle core 301 can rotate at the affected part for sampling, and after the sampling is finished, the biopsy needle core 301 rotates to the position of the guide groove 305 along the positioning groove 306 and retracts into the needle tube of the outer trocar 1 along the guide groove 305.

According to the utility model discloses an embodiment the different degree of depth of guide way 305 sets up constant head tank 306 respectively, for example will guide way 305 divides into the trisection in the axial direction, at one-third halving position, two-thirds halving position and guide way end set up respectively one with the constant head tank of guide way 305 intercommunication for medical personnel can be according to the patient's condition, control biopsy needle core 301 punctures different degree of depth to the rotation is taken a sample and is operated, and application scope is bigger, operates more in a flexible way.

According to an embodiment of the present invention, preferably, the guiding slot 305 is an arc-shaped slot, and pressing the biopsy push rod 304 can make the sliding block 307 slide along the guiding slot 305, so that the biopsy needle core 301 performs rotary sampling while extending, and does not need to perform rotary sampling alone, thereby improving the efficiency of operation.

According to an embodiment of the present invention, preferably, the bottom of the mounting hole of the biopsy positioning base 302 is provided with a spring 308, the spring 308 is fixed to the biopsy needle core 301, and the spring 308 is compressed and deformed when the biopsy push rod 304 is used for sampling, and after the sampling is completed, the spring 308 recovers and deforms to drive the biopsy needle core 301 to return to the initial position, which does not need to be right when the biopsy push rod 304 is pulled, so that the time for retracting the biopsy needle core 301 is shortened, and the damage to the patient can be reduced.

According to the technical scheme of the utility model, the radiofrequency ablation needle 4 comprises a radiofrequency ablation base 402 and a radiofrequency ablation needle core 401, the needle tip end of which is a radiofrequency heating needle head 403, the end of the radiofrequency ablation needle core 401 is provided with an operating rod 404, and the radiofrequency ablation base 402 is sleeved outside the radiofrequency ablation needle core 401 near the operating rod 404; when in use, the radiofrequency ablation needle 4 is inserted into the hollow outer trocar 1 instead of the sealing needle core 2, the needle tip of the radiofrequency ablation needle core 401 can extend out from the head end of the outer trocar 1 by operating the operating rod 404 to perform radiofrequency ablation, and after the radiofrequency ablation is finished, the needle tip of the radiofrequency ablation needle core 401 can retract into the needle tube of the outer trocar 1 by operating the operating rod 404.

When the radiofrequency ablation needle 4 needs to be used, the sealed needle core 2 or the biopsy sampling needle 3 is taken out and replaced by the radiofrequency ablation needle core 401, the needle tip of the radiofrequency ablation needle core 401 can extend out of the head end of the outer trocar 1 to enter the affected part of a patient by operating the operating rod 404, radiofrequency ablation operation can be performed, after the radiofrequency ablation is completed, the needle tip of the radiofrequency ablation needle core 401 can retract into the needle tube of the outer trocar 1 by operating the operating rod 404, the radiofrequency ablation needle core 401 is taken out, the sealed needle core 2 is installed in the needle tube of the outer trocar 1, and if other operations are not needed, the radiofrequency ablation needle core 401 and the outer trocar 1 can be pulled out together.

The tail end of the radio frequency ablation needle 4 is a wire connecting end, the wire connecting end is electrically communicated with the needle tip end of the radio frequency ablation needle core 401, after the needle tip end of the radio frequency ablation needle core 401 enters the affected part of a patient, a wire of a radio frequency machine is connected to the wire connecting end, the radio frequency machine is started, the needle tip end of the radio frequency ablation needle core 401 can generate heat to perform radio frequency ablation operation on the affected part, and tumor cells of the affected part are necrotized or apoptotic in a heating mode.

According to the utility model discloses an embodiment, radiofrequency ablation base 402 is provided with clamping device and reset spring, clamping device is in when radiofrequency ablation nook closing member 401 removes to the radiofrequency ablation position, can press from both sides tightly radiofrequency ablation nook closing member 401 avoids shifting, melts at the radiofrequency after finishing, removes through pressing clamping device's clamp force makes through reset spring radiofrequency ablation nook closing member 401 resumes original state.

According to an embodiment of the present invention, preferably, the rf ablation needle 4 further includes an rf ablation needle cylinder 405, the rf ablation needle cylinder 405 with the rf ablation base 402 is fixed to be sleeved on the outside of the rf ablation needle core 401, and when in use, the rf ablation needle cylinder 405 is inserted into the needle tube of the outer trocar 1, the rf ablation needle core 401 can move along the inner cavity of the rf ablation needle cylinder 405.

According to an embodiment of the present invention, preferably, the rf heating needle 403 is a straight needle or a claw needle, the rf heating needle 403 is accommodated in the rf ablation needle cylinder 405, and the operation of the operating rod 404 enables the rf heating needle 403 to extend out of the rf ablation needle cylinder 405. When the claw-shaped needle head does not extend out of the radio frequency ablation needle cylinder 405, the claw-shaped needle head is contracted in the radio frequency ablation needle cylinder 405, and when the claw-shaped needle head extends out of the radio frequency ablation needle cylinder 405, the claw-shaped needle head is unfolded into a claw shape, so that the claw-shaped needle head can penetrate into all directions of an affected part, and a more effective ablation effect can be achieved; the claw-shaped needle head can be designed into different radiation sizes, and tumors with different sizes can be conveniently treated.

According to an embodiment of the present invention, preferably, when the biopsy sampling needle 3 is installed by replacing the sealing needle core 2 and being inserted into the needle cylinder of the outer trocar 1, the biopsy positioning base 302 can be installed coaxially with the outer trocar positioning seat 101; when the radiofrequency ablation needle 4 is installed by being inserted into the hollow outer trocar 1 instead of the sealing needle core 2, the radiofrequency ablation base 402 can be installed coaxially with the outer trocar positioning seat 101.

According to an embodiment of the present invention, preferably, biopsy positioning base 302 with outer trocar positioning seat 101 accomplishes coaxial arrangement through buckle structure or helical structure locking, radiofrequency ablation base 402 with outer trocar positioning seat 101 accomplishes coaxial arrangement through buckle structure or helical structure locking to the in-process of guaranteeing to carry out biopsy sample and radiofrequency ablation, biopsy sample needle 3 with radiofrequency ablation needle 4's stability.

According to the utility model discloses an embodiment the outer wall of biopsy location base 302 with the outer wall that radio frequency melts base 402 is provided with the operating handle or the operation arch of symmetry, and medical personnel can catch on forefinger and middle finger operating handle or operation arch use the thumb to push down the operation, the simple operation, and the practicality is strong.

The utility model aims at providing a coaxial puncture needle set, which comprises a hollow outer thimble needle 1 for puncture, a sealing needle core 2, a biopsy sampling needle 3 and a radio frequency ablation needle 4; after the outer trocar 1 provided with the sealed needle core 2 is punctured into the affected part of the patient, the sealed needle core 2 is taken out and replaced by the biopsy sampling needle 3, by operating the biopsy push rod 304, the needle tip of the biopsy needle core 301 can be extended from the head end of the outer trocar 1, the tip of the biopsy needle core 301 is penetrated into the affected part, by rotating the biopsy sampling needle 3, the biopsy sampling groove 303 arranged at the needle tip of the biopsy sampling needle 3 can sample the affected part, after sampling is finished, the needle tip of the biopsy needle core 301 can be retracted into the needle tube of the outer trocar 1 by operating the biopsy push rod 304, the biopsy sampling needle 3 is pulled out to collect and send the obtained tissue sample of the affected part, and the sealed needle core 2 is reinserted into the needle tube of the outer trocar 1 or replaced by the radiofrequency ablation needle 4; when the radiofrequency ablation needle 4 needs to be used, the sealed needle core 2 or the biopsy sampling needle 3 is taken out and replaced by the radiofrequency ablation needle core 401, the needle tip of the radiofrequency ablation needle core 401 can extend out of the head end of the outer trocar 1 to enter the affected part of a patient by operating the operating rod 404, radiofrequency ablation operation can be performed, after the radiofrequency ablation is finished, the needle tip of the radiofrequency ablation needle core 401 can retract into the needle tube of the outer trocar 1 by operating the operating rod 404, the radiofrequency ablation needle core 401 is taken out, the sealed needle core 2 is installed in the needle tube of the outer trocar 1, and if other operations are not needed, the radiofrequency ablation needle core 401 and the outer trocar 1 can be pulled out together; to the patient that needs carry out biopsy sample and radiofrequency ablation, only need use outer trocar 1 carries out a puncture operation, changes sealed nook closing member 2 does biopsy sample needle 3 carries out biopsy sample operation, changes again biopsy sample needle 3 does radiofrequency ablation needle 4 carries out radiofrequency ablation operation, has avoided puncture many times to cause the wound to the patient, has avoided the patient because complications such as hemorrhage, pneumothorax, infection appear in the puncture many times, can shorten operation time, reduce the degree of difficulty and the complication of operation, better protection patient's safety.

The above describes in detail optional implementation manners of embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details in the above implementation manners, and in the technical concept scope of the embodiments of the present invention, it is possible to perform various simple modifications on the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.

In addition, various different implementation manners of the embodiments of the present invention can be combined arbitrarily, and as long as it does not violate the idea of the embodiments of the present invention, it should be considered as the disclosure of the embodiments of the present invention.

Claims

1. A coaxial puncture needle set, which comprises a hollow outer trocar (1) and a sealing needle core (2) which is accommodated in a needle tube of the outer trocar (1) and is matched with the inner diameter of the outer trocar (1), and is characterized in that,

the coaxial puncture needle kit also comprises a biopsy sampling needle (3) and a radio frequency ablation needle (4);

the biopsy sampling needle (3) comprises a biopsy positioning base (302) and a biopsy needle core (301) with a biopsy sampling groove (303) arranged at the needle tip, a biopsy push rod (304) is arranged at the tail end of the biopsy needle core (301), the biopsy positioning base (302) is sleeved outside the biopsy needle core (301) close to the biopsy push rod (304), a guide structure is arranged on the inner wall of the biopsy positioning base (302), and the biopsy needle core (301) can move relative to the biopsy positioning base (302) along the guide structure; when in use, the biopsy sampling needle (3) is inserted into the outer trocar (1) in place of the sealing needle core (2), the biopsy needle core (301) is moved along the guide structure of the inner wall of the biopsy positioning base (302) by operating the biopsy push rod (304), the needle tip of the biopsy needle core (301) can be extended out from the head end of the outer trocar (1) for biopsy sampling, and the needle tip of the biopsy needle core (301) can be retracted into the needle tube of the outer trocar (1) by operating the biopsy push rod (304) after sampling is finished;

the radio frequency ablation needle (4) comprises a radio frequency ablation base (402) and a radio frequency ablation needle core (401) with a needle tip being a radio frequency heating needle head (403), an operating rod (404) is arranged at the tail end of the radio frequency ablation needle core (401), and the radio frequency ablation base (402) is sleeved outside the radio frequency ablation needle core (401) close to the operating rod (404); when in use, the radio frequency ablation needle (4) is inserted into the hollow outer trocar (1) in place of the sealing needle core (2), the needle tip of the radio frequency ablation needle core (401) can be extended out from the head end of the outer trocar (1) to perform radio frequency ablation by operating the operating rod (404), and the needle tip of the radio frequency ablation needle core (401) can be retracted into the needle tube of the outer trocar (1) by operating the operating rod (404) after the radio frequency ablation is finished.

2. The coaxial puncture needle kit according to claim 1, wherein the head end of the outer trocar (1) is used for puncturing into the body of a patient, the other end of the outer trocar is provided with an outer trocar positioning seat (101), the open end of the outer trocar positioning seat (101) is provided with a containing groove, the bottom of the containing groove is provided with an inserting hole, and the tail end of the sealed stylet (2) is provided with a stylet base (201); when the needle core is installed, the needle tip of the sealed needle core (2) is inserted into the outer trocar (1) through the insertion hole, and the needle core base (201) is embedded into the accommodating groove of the outer trocar positioning seat (101) for fixing.

3. The coaxial puncture needle kit according to claim 1, characterized in that the outer trocar (1) is externally sleeved with a protective ring (102) which can be pulled up and down, after the outer trocar (1) is punctured into the body of a patient, the outer trocar (1) can be fixed from displacement by manually pulling the protective ring (102) to be close to the skin of the patient.

4. The coaxial introducer needle assembly of claim 1, wherein the biopsy positioning base (302) has a mounting hole formed therein for allowing the biopsy needle core (301) to pass therethrough, the guide structure comprising: a guide groove (305) along the axial direction and a positioning groove (306) along the radial direction are arranged on the hole wall of the mounting hole, the positioning groove (306) is communicated with the guide groove (305), a sliding block (307) capable of sliding along the guide groove (305) and the positioning groove (306) is arranged on the biopsy needle core (301), the sliding block (307) can slide to the position of the positioning groove (306) along the guide groove (305) by pressing the biopsy push rod (304), the sliding block (307) can slide into the positioning groove (306) by rotating the biopsy push rod (304), and the needle tip of the biopsy needle core (301) is sampled; after sampling, the biopsy push rod (304) is rotated reversely to rotate the sliding block (307) to the position of the guide groove (305) along the positioning groove (306), and the sliding block (307) can slide along the guide groove (305) by pulling the biopsy push rod (304), so that the needle tip of the biopsy needle core (301) retracts into the needle tube of the outer trocar (1).

5. The coaxial puncture needle set according to claim 4, wherein the guide groove (305) is an arc-shaped groove, and pressing the biopsy push rod (304) can slide the slide block (307) along the guide groove (305) so as to allow the biopsy needle core (301) to be rotatably sampled while being extended.

6. The coaxial puncture needle set of claim 4, wherein a spring (308) is arranged at the bottom of the mounting hole of the biopsy positioning base (302), the spring (308) is fixed with the biopsy needle core (301), the spring (308) is compressed and deformed when the biopsy push rod (304) is pressed for sampling, and the spring (308) is deformed again after sampling to drive the biopsy needle core (301) to return to the initial position.

7. The coaxial puncture needle kit according to claim 1, wherein the radiofrequency ablation needle (4) further comprises a radiofrequency ablation needle cylinder (405), and the radiofrequency ablation needle cylinder (405) and the radiofrequency ablation base (402) are fixedly sleeved outside the radiofrequency ablation needle core (401).

8. The coaxial puncture needle kit according to claim 7, wherein the rf heating needle (403) is a straight needle or a claw needle, the rf heating needle (403) is accommodated in the rf ablation barrel (405), and the rf heating needle (403) is extended out of the rf ablation barrel (405) by operating the operating lever (404).

9. The coaxial puncture needle kit according to claim 2, wherein the biopsy positioning base (302) is coaxially mountable with the outer trocar positioning seat (101) when the biopsy sampling needle (3) is mounted by being inserted into the cylinder of the outer trocar (1) in place of the sealing core (2); when the radio frequency ablation needle (4) is used for replacing the sealing needle core (2) and is inserted into the hollow outer trocar (1) for installation, the radio frequency ablation base (402) can be coaxially installed with the outer trocar positioning seat (101).

10. The coaxial puncture needle kit according to claim 9, wherein the biopsy positioning base (302) and the outer trocar positioning seat (101) are locked together by a snap structure or a screw structure to complete coaxial installation, and the radiofrequency ablation base (402) and the outer trocar positioning seat (101) are locked together by a snap structure or a screw structure to complete coaxial installation.