CN110327108A - Adjustable cryoablation needle - Google Patents
Adjustable cryoablation needle Download PDFInfo
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- CN110327108A CN110327108A CN201910742191.1A CN201910742191A CN110327108A CN 110327108 A CN110327108 A CN 110327108A CN 201910742191 A CN201910742191 A CN 201910742191A CN 110327108 A CN110327108 A CN 110327108A
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- shank
- back segment
- heat
- insulated pipe
- leading portion
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- 230000008685 targeting Effects 0.000 claims abstract description 29
- 230000001360 synchronised effect Effects 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims description 19
- 238000009413 insulation Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 11
- 239000011229 interlayer Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 5
- 229910000639 Spring steel Inorganic materials 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 8
- 206010028980 Neoplasm Diseases 0.000 description 13
- 238000000034 method Methods 0.000 description 13
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- 208000027418 Wounds and injury Diseases 0.000 description 3
- 210000004204 blood vessel Anatomy 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 210000001835 viscera Anatomy 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 208000008589 Obesity Diseases 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 235000020824 obesity Nutrition 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00577—Ablation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
- A61B2018/0231—Characteristics of handpieces or probes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
- A61B2018/0293—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques using an instrument interstitially inserted into the body, e.g. needle
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Otolaryngology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Finger-Pressure Massage (AREA)
Abstract
The present invention provides a kind of adjustable cryoablation needles, comprising: shank, leading portion heat-insulated pipe and back segment heat-insulated pipe；The shank can be relative to the back segment heat-insulated pipe along the axial movement of back segment heat-insulated pipe, to adjust the axial distance between back segment heat-insulated pipe front end and the shank front end；The leading portion heat-insulated pipe can be synchronized relative to the back segment heat-insulated pipe with the shank along the axial movement of back segment heat-insulated pipe, so that the length of the targeting district of the adjustable cryoablation needle remains unchanged；The present invention can avoid that doctor selects cryoablation needle-like number and bring is constant, can also sufficiently adapt to different depth of needle, convenient for avoiding shank from being bent, and cause to tear equivalent damage danger to tissue so that the length for being exposed at outer shank part is short as far as possible.
Description
Technical field
The present invention relates to medical instruments field more particularly to a kind of adjustable cryoablation needles.
Background technique
Existing cryoablation needle is often provided with the model of two kinds of shank length of short and elongated, and shank length determines
Needle point is inserted into the depth of human body, if knub position is shallower and inserting needle direction is without hindrance safely, the freezing of short shank may be selected
Ablation needle is inserted into tumour and carries out cryoablation treatment, if knub position relatively deep (such as patient's obesity causes) or shallower side can not
When inserting needle need to be from deeper side inserting needle, the cryoablation needle of elongated shank may be selected.
In cryoablation operation, after shank is inserted into human body, safest state is that shank is fully inserted into human body, however,
The cryoablation needle for selecting elongated or short, always has one section of shank to expose to human body, when the exposed shank length with human body compared with
When long, due to the self gravity of cryoablation needle or other pull the effect of power, shank can bend, and bending may cause true
Cooling capacity at empty heat-insulated pipe leaks, tissue can also be caused it is unnecessary pull, when serious, tissue may be torn, also
It may cause shank to fracture.The torque of exposed longer of shank, opposite human body is bigger, and danger coefficient is higher.
As it can be seen that existing, the fixed cryoablation needle of shank length is difficult to meet the Treatment need of multiplicity in the related technology, and
It is easy to be formed exposed shank part in the course of surgery, be bent so as to cause shank or injury risk is caused to human body.
Summary of the invention
The present invention provides a kind of adjustable cryoablation needle, is difficult to meet to solve the fixed cryoablation needle of shank length
The Treatment need of multiplicity, and it is easy to be formed exposed shank part in the course of surgery, it is bent so as to cause shank or right
Human body causes the problem of injury risk.
According to the first aspect of the invention, a kind of adjustable cryoablation needle is provided, comprising: shank, leading portion heat-insulated pipe
With back segment heat-insulated pipe；The leading portion heat-insulated pipe is inserted into the shank from the rear end of the shank, and the leading portion heat-insulated pipe is described in
The front end of back segment heat-insulated pipe is accessed in the back segment heat-insulated pipe；
The shank can be relative to the back segment heat-insulated pipe along the axial movement of the back segment heat-insulated pipe, described in adjustment
Axial distance between back segment heat-insulated pipe front end and the shank front end；The leading portion heat-insulated pipe can be with the synchronous phase of the shank
For the back segment heat-insulated pipe along the axial movement of the back segment heat-insulated pipe, so that the targeting of the adjustable cryoablation needle
The length in area remains unchanged；
Wherein, the length of effective shank section of the adjustable cryoablation needle is with back segment heat-insulated pipe front end and institute
State the axial distance variation between shank front end.
Optionally, the adjustable cryoablation needle further includes for driving the shank exhausted relative to the back segment
For heat pipe along the shank adjustment structure of the axial movement of the back segment heat-insulated pipe, the shank adjustment structure is fixedly connected on the needle
The outside of bar.
Optionally, the adjustable cryoablation needle, further includes handle；
The shank is inserted into the handle from the front end of the handle, and the back segment heat-insulated pipe is set in the handle, and
It is relatively fixed with the position of the handle；The length of effective shank section be the handle front end and the shank front end it
Between axial distance；The tube wall of the handle offers shank regulating tank along the axial direction, and the shank adjustment structure passes through
The shank regulating tank, and can be moved along the shank regulating tank.
Optionally, the shank adjustment structure includes being fixedly connected with the shank sliding block of the shank and being connected to the shank
The shank targeting district driving lever of slide section, the shank targeting district driving lever are in the outside of the shank regulating tank.
Optionally, the adjustable cryoablation needle, further includes air intake structure, and the air intake structure includes the first air inlet
Second air inlet pipe of Guan Yucheng spring like, the front end of first air inlet pipe extend to the shank, first air inlet pipe
Position and the shank are relatively fixed, and the rear end of first air inlet pipe connects the front end of second air inlet pipe, and described second
The position of the rear end direct or indirect connection inlet channel of air inlet pipe, the inlet channel is solid relative to the back segment heat-insulated pipe
Fixed, second air inlet pipe can be by compression and tension along the axial direction.
Optionally, the air intake structure further includes finned tube and mandrel, and the finned tube is wound in the mandrel, the wing
The front end of piece pipe connects the rear end of second air inlet pipe, and air inlet described in the rear end direct or indirect connection of the finned tube is logical
Road, the mandrel are fixed relative to the position of the back segment heat-insulated pipe.
Optionally, when the length of effective shank section is minimum value, second air inlet pipe is in oneself being not stretched
Right state.
Optionally, the material of second air inlet pipe is following one of any: stainless steel, spring steel and memory metal material
Material.
Optionally, the air intake structure further includes mandrel, and second air inlet pipe is wound in the mandrel, the mandrel phase
The position of the back segment heat-insulated pipe is fixed.
Optionally, the second air inlet pipe surface is equipped with heat exchange fin.
Optionally, the adjustable cryoablation needle further includes the shank seal assembly positioned at the shank rear end, institute
Shank seal assembly is stated for sealing the gap between the shank inner wall and leading portion insulation pipe outer wall.
Optionally, the adjustable cryoablation needle further includes the rear insulation positioned at back segment heat-insulated pipe front end
Seal of tube component；The back segment insulation seal assembly is used to seal the gap of the inner wall of the back segment heat-insulated pipe.
Optionally, the leading portion heat-insulated pipe includes leading portion inner tube and leading portion outer tube, outside the leading portion inner tube and the leading portion
Leading portion vacuum interlayer is formed between pipe, the front end of the leading portion inner tube is connect with the front end of the leading portion outer tube, the leading portion
The rear end of inner tube is connect with the rear end of the leading portion outer tube.
Optionally, the rear end of the leading portion inner tube is connect with the rear end of the leading portion outer tube by being insulated pipe gasket, described
The rear end for being insulated pipe gasket has cone-shaped inner hole.
Optionally, the leading portion heat-insulated pipe is respectively provided with the first pipeline section, connection pipeline section and the second pipeline section along axial direction, and described the
The rear end of one pipeline section connects the front end of the connection pipeline section, and the rear end of the connection pipeline section connects the front end of second pipeline section,
The internal diameter of second pipeline section is greater than the internal diameter of first pipeline section, and the outer diameter of second pipeline section is greater than first pipeline section
Outer diameter.
Optionally, the back segment heat-insulated pipe includes back segment inner tube and back segment outer tube, outside the back segment inner tube and the back segment
Back segment vacuum interlayer is formed between pipe, the front end of the back segment inner tube is connect with the front end of the back segment outer tube, the back segment
The rear end of inner tube is connect with the rear end of the back segment outer tube.
In adjustable cryoablation needle provided by the invention, due to back segment heat-insulated pipe front end and the shank front end it
Between axial distance be it is adjustable, and the length of effective shank section of the adjustable cryoablation needle be with the axial distance become
Change, may make the effective shank section that can be used in inserting needle in adjustable cryoablation needle length be it is transformable, in turn,
The present invention can freely change the length according to different Treatment need, to meet the Treatment need of multiplicity.So the present invention can
It avoids that doctor selects adjustable cryoablation needle-like number and bring is constant, can also sufficiently adapt to different depth of needle, be convenient for
So that the length for being exposed at outer shank part is short as far as possible, shank is avoided to be bent, and from causing to tear equivalent damage to tissue
It is dangerous.
Meanwhile as the length of effective shank section changes in the present invention, the length of targeting district can be indeclinable, avoid
Targeting section length synchronizes variation with the variation of effective shank section, and corresponding, the present invention is formed by ice hockey size and can be
Determining, in turn, the Treatment need of adjoining dimensions tumour under different depth of needle can be met, consequently facilitating combining inserting needle depth
Shallowly and tumor size, it can also ensure that targeting district will not change during being treated to tumour, avoid because treating
The variation of targeting district in journey and caused by damage hidden danger.
In addition, the present invention by leading portion heat-insulated pipe and back segment heat-insulated pipe, it can be achieved that the variable adiabatic region of a length, at this
In adiabatic region, it can ensure that the rear end of adiabatic region is in desired position always, so that ensureing that adiabatic region can cover institute always
The position that need to be insulated, without being difficult to keep covering because of moving for heat-insulated pipe.
Adjusting had not only been realized in optinal plan of the present invention, but also may make the position between shank and the first air inlet pipe opposite solid
Fixed, by the relatively fixed of shank and the first air inlet pipe position, it is excessive at a distance from needle point to keep away the first air inlet pipe front end, in turn
It can avoid therefore making ice hockey that can not cover all needle point, prevent the puncture risks to internal organs, blood vessel.Meanwhile can also it prevent
Only shank is projected by high pressure gas, further improves safety.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 a is the schematic illustration one that cryoablation needle is adjusted in one embodiment of the invention；
Fig. 1 b is the schematic illustration two that cryoablation needle is adjusted in one embodiment of the invention；
Fig. 2 is the schematic illustration three that cryoablation needle is adjusted in one embodiment of the invention；
Fig. 3 is the end view of shank and shank adjustment structure in one embodiment of the invention；
Fig. 4 is the schematic cross-section of A-A in Fig. 3；
Fig. 5 is that a kind of structural schematic diagram for adjusting position of cryoablation needle is adjusted in one embodiment of the invention；
Fig. 6 is the structural schematic diagram that cryoablation needle another kind adjustment position is adjusted in one embodiment of the invention；
Fig. 7 is the partial sectional schematic view one that cryoablation needle is adjusted in one embodiment of the invention；
Fig. 8 is the partial sectional schematic view two that cryoablation needle is adjusted in one embodiment of the invention；
Fig. 9 is the structural schematic diagram of leading portion heat-insulated pipe in one embodiment of the invention.
Description of symbols:
1- leading portion heat-insulated pipe；
101- leading portion outer tube；
102- leading portion inner tube；
103- is insulated pipe gasket；
The first pipeline section of 104-；
The second pipeline section of 105-；
106- connection pipeline section；
2- back segment heat-insulated pipe；
201- back segment outer tube；
202- back segment inner tube；
3- shank；
301- needle point；
The effective shank section of 4-；
5- targeting district；
6- adiabatic region；
7- air intake structure；
The first air inlet pipe of 701-；
The second air inlet pipe of 702-；
703- inlet channel；
704- finned tube；
705- mandrel；
706- throttle orifice；
8- return-air structure；
Heat-insulated pipe seal assembly after 9-；
Heat-insulated pipe sealing ring after 901-；
Retaining ring before heat-insulated pipe after 902-；
Retaining ring after heat-insulated pipe after 903-；
10- shank adjustment structure；
1001- shank sliding block；
1002- shank driving lever；
1003- targeting district regulating tank；
1004- front limit portion；
Limiting section after 1005-；
11- handle；
1101- shank regulating tank.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Description and claims of this specification and term " first ", " second ", " third " " in above-mentioned attached drawing
The (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manage
The data that solution uses in this way are interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to
Here the sequence other than those of diagram or description is implemented.In addition, term " includes " and " having " and their any deformation,
Be intended to cover it is non-exclusive include, for example, containing the process, method of a series of steps or units, system, product or setting
It is standby those of to be not necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for these mistakes
The intrinsic other step or units of journey, method, product or equipment.
Technical solution of the present invention is described in detail with specifically embodiment below.These specific implementations below
Example can be combined with each other, and the same or similar concept or process may be repeated no more in some embodiments.
Fig. 1 a is the schematic illustration one that cryoablation needle is adjusted in one embodiment of the invention；Fig. 1 b is that the present invention one is real
Apply the schematic illustration two that cryoablation needle is adjusted in example；Fig. 2 is that cryoablation needle is adjusted in one embodiment of the invention
Schematic illustration three.
Fig. 1 a and Fig. 1 b are please referred to, cryoablation needle is adjusted, comprising: shank 3, leading portion heat-insulated pipe 1 and back segment heat-insulated pipe
2；The leading portion heat-insulated pipe 1 is inserted into the shank 3 from the rear end of the shank 3, and the leading portion heat-insulated pipe 1 is also from the back segment
The front end of heat-insulated pipe 2 is accessed in the back segment heat-insulated pipe 2.After assembly, the shank 3, the leading portion heat-insulated pipe 1 and the back segment
The axial direction of heat-insulated pipe 2 is identical axial direction.
Pass through above description, it is known that position, assembly between 3 three of leading portion heat-insulated pipe 1, back segment heat-insulated pipe 2 and shank are closed
System is based on the relationship, the variation of arbitrary shape and the increase of arbitrary structures all without departing from the description of the present embodiment.
Wherein, the present embodiment by leading portion heat-insulated pipe and back segment heat-insulated pipe, it can be achieved that the variable adiabatic region of a length,
In the adiabatic region, it can ensure that the rear end of adiabatic region is in desired position always, so that ensureing that adiabatic region can cover always
The position of required insulation without being difficult to keep covering because of moving for heat-insulated pipe, such as may make at least portion of air intake structure
Separation structure (further such as the second air inlet pipe) can be always in adiabatic region.That is, only needing to change adiabatic region
Length, to just need to generate the two sections of heat-insulated pipes in front and back in the case where taking into account the coverage area of insulation and targeting section length.
In the present embodiment, the shank 3 can be relative to the back segment heat-insulated pipe 2 along the axial direction of the back segment heat-insulated pipe 2
It is mobile, to adjust the axial distance between 3 front end of 2 front end of back segment heat-insulated pipe and the shank, the length of the axial distance
The L1 as shown in Fig. 1 a and Fig. 1 b and L1+ Δ X1 can be characterized.Meanwhile the axial distance is characterized by axial first distance.
Wherein, because leading portion heat-insulated pipe 1 accesses back segment heat-insulated pipe 2, adiabatic region 6 can be formed, length can be characterized such as figure
L4 shown in 1a and Fig. 1 b.
The length of effective shank section 4 of the adjustable cryoablation needle can be with back segment heat-insulated pipe front end and institute
State the axial distance variation between shank front end.
Wherein, the length of effective shank section 4 can be regarded as the length of the exposed pipeline section part for inserting needle of shank 3
Degree, that is, the pluggable section performed the operation.
In a kind of citing, axial first distance can be equal to, meanwhile, Fig. 1 a, Fig. 1 b and Fig. 2 utilize the axial direction first
Distance characterizes effective shank section 4, and in another citing, the front end side of the back segment heat-insulated pipe 2 of adjustable cryoablation needle can have
There is part for protecting, limit or the structure division of other effects, can be enclosed in the outside of shank 3, being exposed to for shank is outer
Part opposite can reduce, and in turn, the length of effective shank section 4 is then smaller than the axial direction first distance.No matter which kind of mode, effectively
The length of shank section 4 can change with axial first distance.
As it can be seen that in embodiment of above, due between back segment heat-insulated pipe front end and the shank front end it is axial away from
From being adjustable, and the length of effective shank section of the adjustable cryoablation needle is changed with the axial distance, can
So that the length for the effective shank section that can be used in inserting needle in adjustable cryoablation needle be it is transformable, in turn, the above implementation
Mode can freely change the length according to different Treatment need, to meet the Treatment need of multiplicity.So the above embodiment party
Formula can avoid the adjustable cryoablation needle-like number of doctor's selection and bring is constant, can also sufficiently adapt to different depth of needle,
Convenient for avoiding shank from being bent, and cause to tear to tissue so that the length for being exposed at outer shank part is short as far as possible
Injury risk.
However, the length of effective shank section is longer in the variation of effective shank section 4, if heat-insulated pipe does not change,
The length of targeting district is also longer, and the ice hockey being correspondingly formed is bigger, at this point, can only melt big tumour in human body deep position, effectively
The length of shank section is shorter, and the length of targeting district is also shorter, and the ice hockey being correspondingly formed is smaller, at this point, in human body superficial part position
Little tumour can be melted.Therefore, when targeting section length changes with the adjusting of effective shank segment length, it cannot be considered in terms of the inserting needle depth
And tumor size.
So the present embodiment also utilizes Fig. 1 a and Fig. 1 b illustrated embodiment, avoids making when effective shank section is elongated
Targeting district also synchronizes elongated.
Wherein, the leading portion heat-insulated pipe 1 can be moved relative to the back segment heat-insulated pipe 2 along the axial direction of the back segment heat-insulated pipe
It is dynamic, to adjust the axial distance between 1 front end of leading portion heat-insulated pipe and 2 front end of back segment heat-insulated pipe, the axial distance
Length is characterized by L2 shown in Fig. 1 a and Fig. 1 b.Meanwhile the axial distance is characterized by axial second distance.
Fig. 1 a and Fig. 1 b are please referred to, when the length of effective shank section 4 changes, the leading portion heat-insulated pipe 1 can
It is relatively fixed with the position relative to the shank 3, in turn, the leading portion heat-insulated pipe 1 can with the shank 3 it is synchronous relative to
The back segment heat-insulated pipe 2 is axially moveable, so that the length of the targeting district 5 of the adjustable cryoablation needle remains unchanged.
By taking Fig. 1 a and Fig. 1 b as an example, when shank 3 is axially moveable, axial first distance can be extended from L1 to L1+ Δ
X1, corresponding, the length of effective shank section 4 also corresponds to extending Δ X1, and the length of adiabatic region 6 can also correspond to elongation Δ X1.Together
When, since leading portion heat-insulated pipe 1 and the position of shank 3 are relatively fixed, the two moves together, and the length of targeting district 5 can be kept
In L2 without changing.
Referring to FIG. 2, being insulated since the leading portion heat-insulated pipe 1 accesses the rear end from the front end of the back segment heat-insulated pipe 2
In pipe 2, may make can have one section of overlapping region always between leading portion heat-insulated pipe 1 and back segment heat-insulated pipe 2, prevent in needle outside cold air
It lets out.
In other words, the present embodiment passes through the relative motion of two heat-insulated pipes, on the one hand avoids adiabatic region because heat-insulated pipe moves
It is dynamic and be difficult to ensure the covering to position needed for part, on the other hand may also be advantageous for realizing forgoing is directed to targeting district
It adjusts, to take into account the covering of adiabatic region and the adjusting of targeting district.
Referring to FIG. 2, heat-insulated pipe therein can specifically be interpreted as wherein forming the pipe structure of vacuum space gap layer, formed
The structure type of vacuum space gap layer can be arbitrary, and can specifically be illustrated to it in associated description hereinafter.
In one of embodiment, adjustable cryoablation needle may also include air intake structure 7 and/or return-air structure 8.
The front end of air intake structure 7 therein may extend to shank 3, specifically may extend to the position by front end of shank 3,
Such as the needle point of shank 3 is extended to, the rear end of air intake structure 7 can be externally connected to by inlet channel, such as can be direct or indirect
It is connected to gas source.
The front end of return-air structure 8 therein may extend to the rear end side of shank 3 Yu leading portion heat-insulated pipe 1, and after can be at
The inside of section heat-insulated pipe 2, return-air structure 8 can be regarded as capable of guiding and circulate the arbitrary structures that the gas of shank 3 returns backward,
The rear end of return-air structure 8 can the equipment such as direct or indirect connection such as vaccum-pumping equipment, power can be provided for the return of gas.
Fig. 3 is the end view of shank and shank adjustment structure in one embodiment of the invention；Fig. 4 is section of A-A in Fig. 3
Face schematic diagram；Fig. 5 is that a kind of structural schematic diagram for adjusting position of cryoablation needle is adjusted in one embodiment of the invention；Fig. 6 is
The structural schematic diagram of cryoablation needle another kind adjustment position is adjusted in one embodiment of the invention.
Fig. 3 to Fig. 6 illustrates shank 3 and the relatively-stationary embodiment in 1 position of leading portion heat-insulated pipe.
Fig. 3 to Fig. 6 is please referred to, cryoablation needle is adjusted, further includes for driving the shank 3 relative to the back segment
The shank adjustment structure 10 that heat-insulated pipe 2 is axially moveable, the shank adjustment structure 10 are fixedly connected on the outer of the shank 3
Side.
Fig. 4 to fig. 6 is please referred to, the adjustable cryoablation needle, further includes handle 11.Handle 11 herein can also be managed
Solution is knife shell.
The shank 3 is inserted into the handle 11 from the front end of the handle, and the back segment heat-insulated pipe 2 is set to the handle 11
It is interior and relatively fixed with the position of the handle 11.Based on the setting of handle 11, the length of effective shank section 4 can be
Axial distance between 3 front end of front end and the shank of the handle 11.
Fig. 5 and Fig. 6, the adjustable cryoablation needle are please referred to, the tube wall of the handle 11 is provided in the axial direction with needle
Bar regulating tank 1101, the shank adjustment structure 10 pass through the shank regulating tank 1101, and can be along the shank regulating tank
1101 is mobile.
By taking Fig. 5 as an example, shank 3 can be moved rearwardly into extreme position relative to handle 11 and back segment heat-insulated pipe 2, at this time can quilt
The rear end of shank regulating tank 1101 is limited, then by taking Fig. 6 as an example, and shank 3 can be relative to handle 11 and back segment heat-insulated pipe 2 to Forward
It moves to extreme position, can be limited at this time by the front end of shank regulating tank 1101.
Because shank adjustment structure 10 is fixedly connected on shank 3, shank adjustment structure 10 along it is axial move as
Shank 3 is axially moveable, and by the moving operation to shank adjustment structure 10, shank 3 may make to be axially moveable.As it can be seen that
Shank adjustment structure 10 can provide operable structure for the moving operation in internal shank 3, be easy to implement the behaviour of shank 3
Control movement.
Please refer to fig. 4 to fig. 6, in specific implementation process, shank adjustment structure 10 may include shank sliding block 1001 and connect
In the shank driving lever 1002 of the shank sliding block 1001, the shank driving lever 1002 is in the outer of the shank regulating tank 1101
Side, corresponding, shank sliding block 1001 can be stuck in shank regulating tank 1101, and then move along the shank regulating tank 1101.
Wherein, the rear end of shank 3 can be fixed to each other with leading portion heat-insulated pipe 1, also salable, as a result, the length quilt of targeting district 5
Fixed, shank sliding block 1001 is fixed in the centre of shank 3 position rearward, and shank driving lever 1002 and shank sliding block 1001 are fixed,
Therefore stirring shank driving lever 1002 can drive entire shank 3 and leading portion heat-insulated pipe 1 mobile.
Fig. 7 is the partial sectional schematic view one that cryoablation needle is adjusted in one embodiment of the invention；Fig. 8 is the present invention one
The partial sectional schematic view two of cryoablation needle is adjusted in embodiment.
Fig. 7 and Fig. 8 are please referred to, and combines Fig. 5 and Fig. 6, the air intake structure 7 includes the first air inlet pipe 701 and is in spring
Second air inlet pipe 702 of shape.J-T slot can be used in first air inlet pipe 701.The J-T slot for example can be inserted into shank 3, until reaching
Needle point 301, and be inserted into the counterbore of 301 rear end of needle point and be welded and fixed.
In contrast, partially in the prior art, for the purpose of being adjusted to targeting district, shank 3 and such as J-T slot into
Position between tracheae is not fixed to each other, at this point, since the gap between knife shell, shank and J-T slot is excessive, the ice hockey of formation
Position is located at the rear side of needle point, and ice hockey can not cover all needle point, so that cutter head can stab its hetero-organization.As it can be seen that its meeting
Cause ice hockey that can not cover needle point, increases operation puncturing risk.
Specifically, if not being fixed to each other between shank and J-T slot, in targeting district adjustment process, such as since J-T slot is logical
Be often it is relatively-stationary with the position of heat-insulated pipe, before this results in the relative motion between J-T slot and heat-insulated pipe to will lead to J-T slot
The distance between end and needle point can change with targeting district one.When longer targeting district is arrived in adjusting, J-T front of the slot and needle point
Distance it is also larger, from J-T slot spray refrigerant can not form flow regime in the shank space in front of J-T slot, by
This, which will lead to ice hockey, can not be completely covered needle point.If ice hockey can not cover needle point, which results in needle points in operation must be complete
Across tumour and it is inserted into normal tissue, if tumour is close to big blood vessel or important organ, needle point passes completely through tumour and has very at this time
Big puncture risks.
In addition, passing through the fixation of shank and J-T slot, shank can be further prevented to be projected by high pressure gas, increased together
Safety guarantee keeps operation safer.
The front end of first air inlet pipe 701 extends to the shank 3, specifically may extend to the needle point 301 of shank 3, institute
Position and the shank 3 for stating the first air inlet pipe 701 are relatively fixed, the rear end connection described second of first air inlet pipe 701
The front end of air inlet pipe 702, the rear end direct or indirect connection inlet channel 703 of second air inlet pipe 702, the inlet channel
703 position is fixed relative to the back segment heat-insulated pipe 2.
Second air inlet pipe 702 therein, it will be appreciated that in spring like, and the spring like can be stretched and press along the axial direction
The structure of contracting, the flexible mobile demand for meeting shank 3 relative to back segment heat-insulated pipe 2 and handle 11 that can be filled by spring.
In addition, the second air inlet pipe of spring can be understood as hollow tube, independent spring specifically for example can be,
It can be and form J-T slot coiling, it is seen that the first air inlet pipe and the second air inlet pipe can be same material, be also possible to difference
, wherein the material of the second air inlet pipe is specifically as follows memory metal material, or stainless steel or spring steel or NiTi close
Gold or other memory metalloid materials.
Referring to FIG. 5, when shank adjustment structure 10 is located at shank 1101 rear end of regulating tank, the length of effective shank section 4
Most short, the second air inlet pipe 702 of spring like can be at nature.It stirs shank driving lever 1002 to adjust forward, shank driving lever will
Entire shank adjustment structure 10 is driven to move axially forward with shank 3, so that effectively shank section 4 is elongated, spring like
Second air inlet pipe 702 is gradually stretched.
Referring to FIG. 6, when shank adjustment structure 10 is moved to shank 1101 front end of regulating tank, the length of effective shank section 4
Longest is spent, the second air inlet pipe 702 of spring like is in maximum tension state at this time.
In addition, can prevent shank 3 from being projected by high pressure gas by handle 11, if but the material of handle is plastic material,
Limited strength and easy to aging, if handle is broken, shank 3 will be there is no any additional safety safeguard and by high pressure gas
It projects.So in the present embodiment optinal plan, can be fixedly connected between the first air inlet pipe and needle point 301, to prevent 3 quilt of shank
High pressure gas projects increases one of safety guarantee again.
In one of embodiment, referring to FIG. 8, it can be regarded as on the basis of embodiment shown in Fig. 7 into one
The improvement of step, wherein the air intake structure 7 further includes finned tube 704 and mandrel 705, and the finned tube 704 is wound in the core
Axis 705, the front end of the finned tube 704 connect the rear end of second air inlet pipe 702, and the rear end of the finned tube 704 is direct
Or it is indirectly connected with the inlet channel 703.It is fixed that wherein the position of mandrel 705, which can be with back segment heat-insulated pipe 2, handle 11,
's.
In specific implementation process, mandrel 705, inlet channel 703 and 8 three of return gas channel are solderable to be fixed on back segment insulation
The rear end of pipe 2.It can successively be welded between first air inlet pipe 701, the second air inlet pipe 702, finned tube 704 and inlet channel 703 solid
It is fixed.
In addition, the second air inlet pipe of spring like can also be used to substitute in the finned tube.When second air inlet pipe substitutes finned tube,
It can be inserted with mandrel inside second air inlet pipe of spring like, heat exchange fin can also be increased in spring outer surface.
That is: in a kind of citing, the air intake structure 7 may also include mandrel, and second air inlet pipe is wound in the core
Axis, the mandrel are fixed relative to the position of the back segment heat-insulated pipe.The second air inlet pipe surface is equipped with heat exchange fin.
As it can be seen that finned tube 704 and mandrel 705 is whether arranged, all without departing from the description of the present embodiment.Meanwhile it not setting
The scheme for setting finned tube 704 is conducive to reduce the length of entire handle 11, and finned tube 704 and the scheme of mandrel 705, which is arranged, to be had
It is firm conducive to the position for improving air intake structure 7.
Mandrel 705 referred to above can be hollow tubular structure.Wherein hollow space can be for example for thermometric line
It passes through, thermometric line may extend to the front end of heat-insulated pipe, to survey the temperature of the position, and feed back to the back-end, thermometric line and mandrel
Between can pass through sealant pouring and sealing.
In specific implementation process, throttle orifice 706 is additionally provided in the first air inlet pipe 701.In a kind of citing, throttle orifice 706 can
Always it is in the front end side of heat-insulated pipe, to guarantee in any adjusting position, throttle orifice 706 is always positioned at the interior of targeting district
Portion.
In one of embodiment, sealing fixation, another embodiment party can be between shank 3 and leading portion heat-insulated pipe 1
In formula, sealing can also not be realized in connection between shank 3 and leading portion heat-insulated pipe 1, and then (do not schemed using shank seal assembly
Show) realize sealing, such as: the adjustable cryoablation needle further includes that shank positioned at 3 rear end of shank seals
Component, can be fixedly installed on the rear end of shank 3, the shank seal assembly for seal 3 inner wall of shank and it is described before
Gap between section 1 outer wall of heat-insulated pipe.By shank seal assembly, gas leak in needle can be effectively prevent.
Fig. 3, Fig. 5 and Fig. 6 are please referred to, and combines other accompanying drawings, the adjustable cryoablation needle further includes being located at institute
The rear heat-insulated pipe seal assembly 9 for stating 2 front end of back segment heat-insulated pipe, can be fixedly installed on the front end of back segment heat-insulated pipe 2, the present embodiment
Also it is not excluded for being positioned in the embodiment of handle 11 or other structures.The back segment insulation seal assembly 9 is for sealing institute
State the gap of the inner wall of back segment heat-insulated pipe 2.
In a kind of citing, if the shank 3 is inserted into the front end of the back segment heat-insulated pipe 2: heat-insulated pipe sealing group after described
Part 9 is used to seal the gap between the outer wall of the shank 3 and 2 inner wall of back segment heat-insulated pipe.
In another kind citing, if the leading portion heat-insulated pipe 1 is inserted into the back segment heat-insulated pipe 2, the shank is not inserted into described
Back segment heat-insulated pipe, then: outer wall and the back segment of the heat-insulated pipe seal assembly 9 for sealing the leading portion heat-insulated pipe 1 are exhausted after described
Gap between 2 inner wall of heat pipe.
Heat-insulated pipe seal assembly 9 can be beneficial to prevent cool air leakage in needle afterwards.
In specific implementation process, rear heat-insulated pipe seal assembly 9 may include that the preceding retaining ring 902 of rear heat-insulated pipe, rear heat-insulated pipe are close
Retaining ring 903 after seal 901, rear heat-insulated pipe.
Retaining ring 903 may connect to the front end of back segment heat-insulated pipe 2 after heat-insulated pipe afterwards, and the rear preceding retaining ring 902 of heat-insulated pipe can be from rear exhausted
Retaining ring 903 after heat-insulated pipe after the inside of retaining ring 903 is connect with front side after heat pipe, wherein the rear end one of retaining ring 902 before rear heat-insulated pipe
The front end side of retaining ring 903 and the inside of retaining ring after rear heat-insulated pipe can form close for heat-insulated pipe after accommodating after side, rear heat-insulated pipe
The space of seal 901.
Wherein, one can be connected to by helicitic texture between retaining ring 903 after the preceding retaining ring 902 of rear heat-insulated pipe and rear heat-insulated pipe
It rises.
In specific implementation process, retaining ring 903 can close the gap being connected in back segment heat-insulated pipe 2 after rear heat-insulated pipe.
Fig. 9 is the structural schematic diagram of leading portion heat-insulated pipe in one embodiment of the invention.
One of embodiment, referring to FIG. 9, and combine other accompanying drawings, the leading portion heat-insulated pipe 1 include leading portion inner tube
102 with leading portion outer tube 101, leading portion vacuum interlayer is formed between the leading portion inner tube 102 and the leading portion outer tube 101, it is described
The front end of leading portion inner tube 102 is connect with the front end of the leading portion outer tube 101, the rear end of the leading portion inner tube 102 and the leading portion
The rear end of outer tube 101 connects.In specific implementation process, at least one end of the leading portion vacuum interlayer can vacuum welding sealing, formed
Band permanent vacuum interlayer.
In specific implementation process, referring to FIG. 9, the rear end of the rear end of the leading portion inner tube 102 and the leading portion outer tube 101
It can be connected by insulation pipe gasket 103, the rear end of the insulation pipe gasket 103 can have cone-shaped inner hole.In turn, taper can be passed through
Inner hole is suitable for external connection.
The gap liner that insulation pipe gasket 103 therein can be used between leading portion outer tube 101 and leading portion inner tube 102.
In one of embodiment, referring to FIG. 4, what the internal diameter of leading portion heat-insulated pipe 1 and outer diameter can remain unchanged.It is another
In embodiment, referring to FIG. 9, the leading portion heat-insulated pipe 1 respectively includes the first pipeline section 104, connection pipeline section 106 and the along axial direction
Two pipeline sections 105, the rear end of first pipeline section 104 connects the front end of the connection pipeline section 106, after the connection pipeline section 106
End connects the front end of second pipeline section 105, and the internal diameter of second pipeline section 105 is greater than the internal diameter of first pipeline section 104, institute
The outer diameter for stating the second pipeline section 105 is greater than the outer diameter of first pipeline section 104.
By the variation of internal diameter, outer diameter, it may be such that the first pipeline section 104 of leading portion heat-insulated pipe 1 can be convenient for matching insertion shank
In 3, the second pipeline section 104 of leading portion heat-insulated pipe 1 can be convenient for matching insertion back segment heat-insulated pipe 2.
In one of embodiment, Fig. 7 and Fig. 8 are please referred to, the back segment heat-insulated pipe 2 includes back segment inner tube 202 with after
Section outer tube 201, is formed with back segment vacuum interlayer, the back segment inner tube between the back segment inner tube 202 and the back segment outer tube 201
202 front end is connect with the front end of the back segment outer tube 201, the rear end of the back segment inner tube 202 and the back segment outer tube 201
Rear end connection.
Wherein, the front end of back segment inner tube 202 can be connect with the front end of back segment outer tube 201 by rear heat-insulated pipe seal assembly 9,
The rear end of back segment inner tube 202 and the rear end of back segment outer tube 201 can be sealed by vacuum welding, to form band permanent vacuum gap
Layer.
In conclusion in adjustable cryoablation needle provided in this embodiment, by back segment heat-insulated pipe front end and institute
State the axial distance between shank front end be it is adjustable, and the length of effective shank section of the adjustable cryoablation needle be with
The axial distance variation, may make the effective shank section that can be used in inserting needle in adjustable cryoablation needle length be can
Variation, in turn, the present embodiment can freely change the length according to different Treatment need, to meet the treatment need of multiplicity
It asks.So the present embodiment can avoid the adjustable cryoablation needle-like number of doctor's selection and bring is constant, can also sufficiently adapt to not
With depth of needle, convenient for avoiding shank from being bent, and to human body group so that the length for being exposed at outer shank part is short as far as possible
It weaves into and tears equivalent damage danger.
Meanwhile as the length of effective shank section changes in the present embodiment, targeting section length is avoided with effective shank section
Variation and synchronize variation, corresponding, the present embodiment is formed by ice hockey size and can be determining, in turn, can meet difference
The Treatment need of adjoining dimensions tumour under depth of needle, consequently facilitating the inserting needle depth and tumor size are combined, it can also be right
During tumour is treated, ensure targeting district will not change, avoid because in therapeutic process the variation of targeting district due to make
At damage hidden danger.
It in addition, not only having realized adjusting in optinal plan, but also may make the position between shank and J-T slot relatively fixed, lead to
Cross the relatively fixed of shank and J-T groove location, it is excessive at a distance from needle point to can avoid J-T front of the slot, so can avoid therefore and
So that ice hockey can not cover all needle point, the puncture risks to internal organs, blood vessel are prevented.Meanwhile can also it prevent shank by high pressure
Gas projects, and further improves safety.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (15)
1. a kind of adjustable cryoablation needle characterized by comprising shank, leading portion heat-insulated pipe and back segment heat-insulated pipe；Before described
Section heat-insulated pipe is inserted into the shank from the rear end of the shank, and the leading portion heat-insulated pipe is also from the front end of the back segment heat-insulated pipe
Access the rear end heat-insulated pipe；
The shank can be relative to the back segment heat-insulated pipe along the axial movement of the back segment heat-insulated pipe, to adjust the back segment
Axial distance between heat-insulated pipe front end and the shank front end；The leading portion heat-insulated pipe can with the shank it is synchronous relative to
The back segment heat-insulated pipe along the back segment heat-insulated pipe axial movement so that the targeting district of the adjustable cryoablation needle
Length remains unchanged；
Wherein, the length of effective shank section of the adjustable cryoablation needle is with back segment heat-insulated pipe front end and the needle
What the axial distance between bar front end changed.
2. adjustable cryoablation needle according to claim 1, which is characterized in that further include for driving the shank phase
For the back segment heat-insulated pipe along the shank adjustment structure of the axial movement of the back segment heat-insulated pipe, the shank adjustment structure is solid
Surely it is connected to the outside of the shank.
3. adjustable cryoablation needle according to claim 2, which is characterized in that further include handle；
The shank is inserted into the handle from the front end of the handle, and the back segment heat-insulated pipe is set in the handle, and with institute
The position for stating handle is relatively fixed；The length of effective shank section is between the front end and the shank front end of the handle
Axial distance；The tube wall of the handle is provided in the axial direction with shank regulating tank, and the shank adjustment structure passes through the shank tune
Slot is saved, and can be moved along the shank regulating tank.
4. adjustable cryoablation needle according to claim 3, which is characterized in that the shank adjustment structure includes fixing
It connects the shank sliding block of the shank and is connected to the shank driving lever of the shank sliding block, the shank driving lever is in the shank
The outside of regulating tank.
5. adjustable cryoablation needle according to any one of claims 1 to 4, which is characterized in that it further include air intake structure,
The air intake structure includes the first air inlet pipe in the second air inlet pipe of spring like, and the front end of first air inlet pipe extends to institute
Shank is stated, the position of first air inlet pipe and the shank are relatively fixed, the rear end of first air inlet pipe connection described the
The front end of two air inlet pipe, the rear end direct or indirect connection inlet channel of second air inlet pipe, the position of the inlet channel
It is fixed relative to the back segment heat-insulated pipe, the second air inlet pipe edge is axial can be by compression and tension.
6. adjustable cryoablation needle according to claim 5, which is characterized in that the air intake structure further includes finned tube
With mandrel, the finned tube is wound in the mandrel, and the front end of the finned tube connects the rear end of second air inlet pipe, described
Inlet channel described in the rear end direct or indirect connection of finned tube, the mandrel are solid relative to the position of the back segment heat-insulated pipe
It is fixed.
7. adjustable cryoablation needle according to claim 5, which is characterized in that the length of effective shank section is most
When small value, second air inlet pipe is in the nature being not stretched.
8. adjustable cryoablation needle according to claim 5, which is characterized in that the material of second air inlet pipe be with
It is one of any down: stainless steel, spring steel and memory metal material.
9. adjustable cryoablation needle according to claim 5, which is characterized in that the air intake structure further includes mandrel,
Second air inlet pipe is wound in the mandrel, and the mandrel is fixed relative to the position of the back segment heat-insulated pipe.
10. adjustable cryoablation needle according to claim 9, which is characterized in that the second air inlet pipe surface is equipped with
Heat exchange fin.
11. adjustable cryoablation needle according to any one of claims 1 to 4, which is characterized in that further include positioned at described
The rear heat-insulated pipe seal assembly of back segment heat-insulated pipe front end；The back segment insulation seal assembly is for sealing the back segment heat-insulated pipe
The gap of inner wall.
12. adjustable cryoablation needle according to any one of claims 1 to 4, which is characterized in that the leading portion heat-insulated pipe
Including leading portion inner tube and leading portion outer tube, leading portion vacuum interlayer is formed between the leading portion inner tube and the leading portion outer tube, it is described
The front end of leading portion inner tube is connect with the front end of the leading portion outer tube, the rear end of the rear end of the leading portion inner tube and the leading portion outer tube
Connection.
13. adjustable cryoablation needle according to claim 13, which is characterized in that the rear end of the leading portion inner tube and institute
The rear end of leading portion outer tube is stated by insulation pipe gasket connection, the rear end of the insulation pipe gasket has cone-shaped inner hole.
14. adjustable cryoablation needle according to claim 14, which is characterized in that the leading portion heat-insulated pipe is along axial point
Not Ju You the first pipeline section, connection pipeline section and the second pipeline section, the rear end of first pipeline section connects the front end for connecting pipeline section, institute
The rear end for stating connection pipeline section connects the front end of second pipeline section, and the internal diameter of second pipeline section is greater than the interior of first pipeline section
Diameter, the outer diameter of second pipeline section are greater than the outer diameter of first pipeline section.
15. adjustable cryoablation needle according to any one of claims 1 to 4, which is characterized in that the back segment heat-insulated pipe
Including back segment inner tube and back segment outer tube, back segment vacuum interlayer is formed between the back segment inner tube and the back segment outer tube, it is described
The front end of back segment inner tube is connect with the front end of the back segment outer tube, the rear end of the rear end of the back segment inner tube and the back segment outer tube
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910742191.1A CN110327108A (en) | 2019-08-13 | 2019-08-13 | Adjustable cryoablation needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910742191.1A CN110327108A (en) | 2019-08-13 | 2019-08-13 | Adjustable cryoablation needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110327108A true CN110327108A (en) | 2019-10-15 |
Family
ID=68149360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910742191.1A Pending CN110327108A (en) | 2019-08-13 | 2019-08-13 | Adjustable cryoablation needle |
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| CN (1) | CN110327108A (en) |
Cited By (1)
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| WO2023083050A1 (en) * | 2021-11-11 | 2023-05-19 | 上海导向医疗系统有限公司 | J-t slot position-adjustable cryoablation needle |
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