Freezing rotary cutting biopsy needle suite

Abstract

The invention discloses a freezing rotary cutting biopsy needle suite, and relates to the technical field of biopsy needles. The freezing rotary cutting biopsy needle suite comprises a puncture needle, a measuring needle and a biopsy needle which are used for sequentially conducting puncture, measurement and biopsy operation, the puncture needle is a disposable puncture coaxial biopsy needle and comprises a needle sleeve and a needle core penetrating through the needle sleeve, the outer diameter of a needle body of the measuring needle and the outer diameter of a needle body of the biopsy needle are consistent with the outer diameter of the needle core, and the measuring needle and the biopsy needle are sequentially inserted into the needle sleeve; a guiding device is further arranged and used for installing the puncture needle, the measuring needle and the biopsy needle, the puncture needle, the measuring needle and the biopsy needle are installed through the guiding device, the puncture needle and the measuring needle are loaded in the guiding device and can be rapidly switched, the multi-time puncture measuring effect is achieved, the biopsy needle is used in cooperation with the guiding device, and the puncture needle is convenient to use. Accurate positioning can also be achieved, the position unification of front and back puncture, measurement and biopsy is kept, deviation does not occur all the time, then the biopsy precision is guaranteed, and damage to surrounding tissue is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of biopsy needles, in particular to a cryo-rotational biopsy needle kit. Background Art

[0002] The Kexin rotary cutting core biopsy needle is based on the "Joule-Thomson" principle. The high-pressure carbon dioxide gas enters the narrow channel inside the needle tip and circulates inside the needle body. Through the violent disturbance of the gas molecules, it absorbs a large amount of heat, causing the needle tip to freeze to about minus 5-9°C within 7 seconds. When the water in the lesion is rapidly cooled to about minus 5 degrees, the freezing and adhesion of the tissue will occur, which is more conducive to the capture of the lesion by the needle tip, thereby avoiding the relative displacement at the moment of cutting and improving the accuracy of sampling. Traditional spring needles often miss the target lesion due to the vibration and deviation of the needle tip. Freezing can increase the brittleness of the tissue, thereby increasing the integrity of the sampled tissue. For loose and difficult-to-form lesions such as ground glass nodules and cystic lesions, satisfactory samples can be obtained, thus solving the pain point of traditional spring needles that require multiple punctures due to incomplete sampling. The turbine structure inside the needle handle can rotate forward under the impetus of high-pressure gas, thereby driving the rapid firing of the rotary cutting tube to produce a cutting effect. Compared with the traditional spring needle, the straight waterfall cutting method and pneumatic rotary cutting are smoother and vibration-free, with higher cutting efficiency. It is currently the new advanced instrument for puncture biopsy.

[0003] When the rotary excision core biopsy needle is punctured under the guidance of CT, after the puncture is in place, the forward length of the sample is measured on the CT, and then the biopsy gun is fired, which is a non-real-time sampling. The main reason is that the frozen rotary excision biopsy system is heavy and cannot be scanned with a gun like a semi-automatic biopsy gun. There is a possibility that the biopsy will be off-target or the puncture will damage normal important organs such as the dorsal blood vessels of the tumor. However, puncture first, then measure, and finally biopsy, which requires multiple operations in succession. Switching different needles during the operation is prone to deviation problems, and the same point needs to be aligned and punctured during the switching process, which is time-consuming and affects efficiency. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a cryo-rotational biopsy needle kit, which solves the problems existing in the current biopsy using a biopsy needle.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a cryo-excision biopsy needle kit, comprising a puncture needle, a measuring needle and a biopsy needle for sequentially performing puncture, measurement and biopsy operations, the puncture needle is a disposable puncture coaxial biopsy needle, the puncture needle comprises a needle sleeve and a needle core inserted therein, the outer diameters of the needle bodies of the measuring needle and the biopsy needle are consistent with the needle core and are inserted into the needle sleeve in sequence;

[0006] A guiding device is also provided, which is used to install the puncture needle, measuring needle and biopsy needle. The guiding device switches the needle core and the measuring needle and inserts them into the needle sleeve in sequence and guides the axial movement. The guiding device supports multiple reciprocating switching of the needle core and the measuring needle for repeated measurement. The guiding device is also used to position and install the biopsy needle and insert it into the needle sleeve.

[0007] Preferably, the lengths of the needle core and the measuring needle are both greater than the needle sleeve, the needle core comprises a first needle tail and a needle head from top to bottom, the measuring needle comprises a second needle tail, a measuring needle body and a measuring tip from top to bottom, the diameter of the measuring tip is smaller than the measuring needle body, and the end of the measuring tip is blunt, and the side of the second needle tail is evenly provided with multiple rows of ridges for rotating the measuring needle.

[0008] Preferably, the guiding device comprises a guiding cylinder, the bottom end of which is a cylinder and the other parts are semi-cylindrical, the guiding cylinder is adhered to the body surface through an adhesive seat, the needle sleeve is crimped between the guiding cylinder and the adhesive seat, and the bottom end of the needle sleeve extends through and below the adhesive seat.

[0009] Preferably, the adhesive seat includes an adhesive plate and a ring arranged at the center of its top, and the ring is clamped and sleeved on the outside of the bottom end of the guide tube, and the adhesive plate is adhered to the skin surface through the medical double-sided adhesive tape at the bottom.

[0010] The adhesive seat includes an adhesive ring piece, which is adhered to the skin surface by a medical double-sided adhesive sticker at the bottom, a semicircular ring is vertically installed between the two opposite sides of the top of the adhesive ring piece, and an arc-shaped slide groove is formed inside the semicircular ring, an arc-shaped slider is slidably arranged inside the arc-shaped slide groove, and the arc-shaped slider is locked with the arc-shaped slide groove by a fastening bolt passing through the rear side of the arc-shaped slide groove, and an arc-shaped positioning groove adapted to the fastening bolt is opened on the rear side of the arc-shaped slide groove, and an insertion rod that can be engaged with the inside of the arc-shaped slider is fixedly connected to the back side of the guide cylinder.

[0011] Preferably, a guide frame is placed inside the guide cylinder, and the guide frame includes a turntable that rotates with the bottom of the inner cavity of the guide cylinder, and C-shaped cylinders are symmetrically connected to the top of the turntable on both sides, and the opening of the C-shaped cylinder is opened radially outward, and the top edges of the first needle tail and the second needle tail extend out of the opening of the C-shaped cylinder, and convex rubber points are provided on both sides of the inner wall of the C-shaped cylinder near the top to engage the first needle tail and the second needle tail.

[0012] Preferably, the two C-shaped cylinders are connected by a connecting plate, and a top cover is fixed to the top of the connecting plate by bolts, and the top cover is sleeved on the outside of the top end of the guide cylinder to keep it coaxial with the guide cylinder, and a magnetic sheet is fixedly connected to the bottom of the turntable, and a groove matching the magnetic sheet is provided at the bottom of the inner surface of the guide cylinder, and the turntable is magnetically attracted to the bottom of the inner surface of the guide cylinder through the magnetic sheet, positioning protrusions are provided on both sides of the bottom of the turntable, and a concave point matching the positioning protrusion is provided at the bottom of the inner surface of the guide cylinder, and the concave point cooperates with the positioning protrusion to perform positioning when the guide frame rotates 180°.

[0013] Preferably, the biopsy needle is a cryo-rotational biopsy needle, which is mounted on the guide tube via a mounting member and the cryo-rotational biopsy needle is coaxial with the needle sleeve.

[0014] Preferably, the mounting member comprises a D-shaped sleeve for being sleeved on the outside of the guide tube, a planar side fixing sleeve of the D-shaped sleeve is provided with a rubber sleeve, and the biopsy needle is elastically bound to the D-shaped sleeve through the rubber sleeve.

[0015] The present invention provides a cryo-rotational biopsy needle kit. Compared with the prior art, it has the following beneficial effects:

[0016] 1. The cryo-biopsy needle kit is equipped with a guide device to install the puncture needle, measuring needle and biopsy needle. The puncture needle and measuring needle are loaded in the guide device and can be quickly switched to achieve multiple puncture measurement effects. The biopsy needle can be used in conjunction with the guide device to achieve accurate positioning, keep the positions of front and back puncture, measurement and biopsy uniform, and never deviate, thereby ensuring the accuracy of the biopsy and avoiding damage to surrounding tissues.

[0017] 2. The measuring needle body and measuring tip of the frozen biopsy needle kit are made of lightweight titanium alloy. The measuring tip is a round blunt head, which can penetrate ordinary tissues. Because the arterial wall is tough, it cannot penetrate the artery, thereby reducing distal vascular damage during lung puncture and reducing bleeding; the second needle tail is cylindrical, with arc-shaped long ridges on the surface, which is convenient for use after rotation.

[0018] 3. The guide device of the cryo-biopsy needle kit is mainly divided into two parts: a guide frame and a guide cylinder. The guide cylinder is used for positioning and fixing the needle sleeve. It does not need to be supported by hands and can always remain stable. It is also used to locate the rotation angle of the guide frame. The guide frame is used to place the needle core and the measuring needle. Through a simple rotation operation, the needle core and the measuring needle can be accurately switched to the top of the needle sleeve, which is convenient for precise insertion. There is no need for careful manual alignment and insertion, and the operation is more convenient.

[0019] 4. For the cryo-biopsy needle kit, after the guide frame is removed, the biopsy needle can be directly installed on the guide cylinder using the mounting parts, which also achieves the positioning effect, making it easy to insert the biopsy needle into the needle sleeve, and the installation and disassembly are simple and convenient.

[0020] 5. The adhesive seat of the cryo-biopsy needle kit has an angle adjustment function. By snapping the guide tube onto the adhesive seat, it can be rotated in an arc, and the puncture angle can be adjusted. The adjustment and fixing methods are simple and convenient. The adhesive seat can also be directly disassembled and is easy to use. The two forms of adhesive seats meet different needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the puncture needle of the present invention in the puncture state;

[0022] Figure 2 It is a schematic diagram of the measuring state of the measuring needle of the present invention;

[0023] Figure 3 It is a schematic diagram of the biopsy needle biopsy state of the present invention;

[0024] Figure 4 An exploded view of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the guide frame of the present invention;

[0026] Figure 6 A schematic diagram of a magnetic sheet and positioning bumps of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the measuring needle of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the needle core of the present invention;

[0029] Fig. 9 is a front perspective view of the mounting member of the present invention;

[0030] Fig.10 is a rear perspective view of the mounting member of the present invention;

[0031] Fig.11 It is a schematic diagram of the installation of the guide tube of the present invention and the adhesive seat of the fifth embodiment;

[0032] Fig.12 It is an exploded view of the guide tube of the present invention and the adhesive seat of the fifth embodiment.

[0033] In the figure: 1- measuring needle, 11- second needle tail, 12- measuring needle body, 13- measuring tip, 14- convex edge;

[0034] 2- Biopsy needle;

[0035] 3-needle sleeve;

[0036] 4-needle core, 41-first needle tail, 42-needle head;

[0037] 5-guiding device, 51-guiding cylinder, 511-groove, 512-concave point, 513-inserting rod, 52-adhesive seat, 521-adhesive plate, 522-ring, 523-adhesive ring, 524-semicircular ring, 525-arc-shaped slide groove, 526-arc-shaped slider, 527-fastening bolt, 528-arc-shaped positioning groove, 53-guide frame, 531-turntable, 532-C-type cylinder, 533-convex rubber point, 534-connecting plate, 535-top cover, 536-magnetic sheet, 537-positioning convex point;

[0038] 6-Mounting parts, 61-D-type sleeve, 62-rubber sleeve. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The present invention provides four technical solutions:

[0041] Figure 1-Figure 4 The first embodiment is shown: a cryo-excision biopsy needle kit, comprising a puncture needle, a measuring needle 1 and a biopsy needle 2 for sequentially performing puncture, measurement and biopsy operations, the puncture needle being a disposable coaxial puncture biopsy needle, the puncture needle comprising a needle sleeve 3 and a needle core 4 inserted therein, the outer diameters of the measuring needle 1 and the biopsy needle 2 are consistent with the needle core 4 and are inserted into the needle sleeve 3 in sequence;

[0042] A guiding device 5 is also provided, and the guiding device 5 is used to install the puncture needle, the measuring needle 1 and the biopsy needle 2. The guiding device 5 switches the needle core 4 and the measuring needle 1 and inserts them into the needle sleeve 3 in sequence and guides the axial movement. The guiding device 5 supports multiple reciprocating switching of the needle core 4 and the measuring needle 1 for repeated measurement. The guiding device 5 is also used to position and install the biopsy needle 2 and insert it into the needle sleeve 3.

[0043] The puncture needle, the measuring needle 1 and the biopsy needle 2 are installed by setting a guiding device 5, wherein the puncture needle and the measuring needle 1 are loaded in the guiding device 5 and can be quickly switched to achieve multiple puncture measurement effects, and the biopsy needle 2 can be used in conjunction with the guiding device 5 to achieve accurate positioning, keep the positions of the previous and subsequent punctures, measurements and biopsies consistent, and never have deviations, thereby ensuring the accuracy of the biopsy and avoiding damage to surrounding tissues.

[0044] Figure 7-Figure 8A second embodiment is shown, which mainly differs from the first embodiment in that the lengths of the needle core 4 and the measuring needle 1 are both greater than the needle sleeve 3, the measuring needle 1 is longer than the ordinary coaxial biopsy needle core, 19 mm longer than the coaxial one, the needle core 4 comprises a first needle tail 41 and a needle head 42 from top to bottom, the measuring needle 1 comprises a second needle tail 11, a measuring needle body 12 and a measuring tip 13 from top to bottom, the second needle tail 11 is made of acrylonitrile-butadiene-styrene plastic material, which has been sterilized with ethylene oxide, the diameter of the measuring tip 13 is smaller than the measuring needle body 12, and the end of the measuring tip 13 is blunt, and a plurality of rows of ridges 14 are evenly arranged on the side of the second needle tail 11 for rotating the measuring needle 1.

[0045] The measuring needle body 12 and the measuring tip 13 of the measuring needle 1 are made of lightweight titanium alloy. The measuring tip 13 is a round blunt head, which can penetrate ordinary tissues. Because the arterial wall is tough, it cannot penetrate the artery, thereby reducing distal vascular damage during lung puncture, thereby reducing bleeding; the second needle tail 11 is cylindrical, with an arc-shaped long strip ridge 14 on the surface, which is convenient for use after rotation.

[0046] Figure 1-Figure 6 The third embodiment is shown, which is mainly different from the first embodiment in that: the guide device 5 includes a guide cylinder 51, the bottom end of the guide cylinder 51 is a cylinder, and the other parts are semi-cylindrical, the guide cylinder 51 is attached to the body surface through an adhesive seat 52, the needle sleeve 3 is crimped between the guide cylinder 51 and the adhesive seat 52, and the bottom end of the needle sleeve 3 extends through and extends to below the adhesive seat 52;

[0047] The adhesive seat 52 includes an adhesive plate 521 and a sleeve ring 522 arranged at the center of its top, and the sleeve ring 522 is clamped and sleeved on the outside of the bottom end of the guide tube 51, and the adhesive plate 521 is adhered to the skin surface through the medical double-sided adhesive sticker at the bottom.

[0048] A guide frame 53 is placed inside the guide cylinder 51, and the guide frame 53 includes a turntable 531 that rotates with the bottom of the inner cavity of the guide cylinder 51, and C-shaped cylinders 532 are symmetrically connected to the top of the turntable 531. The opening of the C-shaped cylinder 532 is radially opened outward, and the top edges of the first needle tail 41 and the second needle tail 11 extend out of the opening of the C-shaped cylinder 532. Convex rubber points 533 are provided on both sides of the inner wall of the C-shaped cylinder 532 near the top to engage the first needle tail 41 and the second needle tail 11.

[0049] The two C-shaped cylinders 532 are connected by a connecting plate 534, and a top cover 535 is fixed to the top of the connecting plate 534 by bolts, and the top cover 535 is sleeved on the outside of the top of the guide cylinder 51 to keep it coaxial with the guide cylinder 51, and a magnetic piece 536 is fixedly connected to the bottom of the turntable 531, and a groove 511 adapted to the magnetic piece 536 is provided at the bottom of the inner surface of the guide cylinder 51, and the turntable 531 is magnetically attracted to the bottom of the inner surface of the guide cylinder 51 through the magnetic piece 536, and positioning protrusions 537 are provided on both sides of the bottom of the turntable 531, and a concave point 512 adapted to the positioning protrusion 537 is provided at the bottom of the inner surface of the guide cylinder 51, and the concave point 512 cooperates with the positioning protrusion 537 to perform positioning when the guide frame rotates 180°.

[0050] The guide device 5 is mainly divided into two parts: a guide frame 53 and a guide cylinder 51. The guide cylinder 51 is used for positioning and fixing the needle sleeve 3. It can always remain stable without the need for hand support. It is also used to locate the rotation angle of the guide frame 53. The guide frame 53 is used to place the needle core 4 and the measuring needle 1. The needle core 4 and the measuring needle 1 can be accurately switched to the top of the needle sleeve 3 through a simple rotation operation, which is convenient for accurate insertion. There is no need for careful manual alignment and insertion, and the operation is more convenient.

[0051] Figure 3 and Figure 9-10 The fourth embodiment is shown, which is mainly different from the third embodiment in that the biopsy needle 2 is a cryo-rotational biopsy needle, which is mounted on the guide cylinder 51 through the mounting member 6 and is coaxial with the needle sleeve 3;

[0052] The mounting member 6 comprises a D-shaped sleeve 61 for sleeved on the outside of the guide tube 51 . A rubber sleeve 62 is fixedly sleeved on the plane side of the D-shaped sleeve 61 . The biopsy needle 2 is elastically bound to the D-shaped sleeve 61 through the rubber sleeve 62 .

[0053] After the guide frame 53 is removed, the biopsy needle 2 can be directly installed on the guide tube 51 using the mounting member 6, which also achieves a positioning effect, making it easy to insert the needle tip of the biopsy needle 2 into the needle sleeve 3, and the installation and disassembly are simple and convenient.

[0054] Figure 11-Figure 12A fifth embodiment is shown, which mainly differs from the third embodiment in that: the adhesive seat 52 includes an adhesive ring piece 523, which is adhered to the skin surface by a medical double-sided adhesive tape at the bottom, a semicircular ring 524 is vertically installed between the two opposite sides of the top of the adhesive ring piece 523, and an arc-shaped slide groove 525 is formed inside the semicircular ring 524, and an angle scale line is arranged on the back of the semicircular ring 524 and on the outside of the arc-shaped slide groove 525, an arc-shaped slider 526 is slidably arranged inside the arc-shaped slide groove 525, and the arc-shaped slider 526 is locked with the arc-shaped slide groove 525 by a fastening bolt 527 penetrating the rear side of the arc-shaped slide groove 525, and an arc-shaped positioning groove 528 adapted to the fastening bolt 527 is opened on the rear side of the arc-shaped slide groove 525, and an insertion rod 513 that can be engaged with the interior of the arc-shaped slider 526 is fixedly connected to the back side of the guide cylinder 51.

[0055] Different from the adhesive seat 52 in the third embodiment which is directly adhered and fixed to the body surface, the adhesive seat 52 in this embodiment has an angle adjustment function. By engaging the guide tube 51 on the adhesive seat 52, an arc-shaped rotation can be performed, thereby adjusting the puncture angle. The adjustment and fixing methods are simple and convenient. The adhesive seat 52 can also be directly disassembled and is easy to use. The two forms of adhesive seats 52 meet different needs.

[0056] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0057] When in use, the measuring needle 1 and the needle core 4 are respectively inserted into the two C-shaped cylinders 532, and the measuring needle 1 and the needle core 4 are pushed up until the needle tail is stuck by the convex rubber point 533, and then the guide frame 53 is put into the guide cylinder 51, and then the guide frame 53 is rotated to align the positioning convex point 537 with the concave point 512, at this time, the magnetic sheet 536 can enter the groove 511 and be sucked, and the guide frame 53 is rotated to align the needle core 4 and the measuring needle 1 with the needle sleeve 3 in turn, and by pushing the part of the needle tail beyond the C-shaped cylinder 532, the needle core 4 and the measuring needle 1 can be pushed down to make them penetrate into the needle sleeve 3, and the puncture and measurement operations are completed;

[0058] After the measurement is completed, the guide frame 53 is removed, the rubber sleeve 62 of the mounting member 6 is put on the handle of the biopsy needle 2, and then the D-shaped sleeve 61 is put on the guide tube 51, and the needle head of the biopsy needle 2 can be aligned with the needle sleeve 3 and inserted.

[0059] If it is necessary to use the adhesive seat 52 of Example 5, the guide tube 51 can be directly inserted into the arc-shaped slider 526 using the insertion rod 513, and then the guide tube 51 can be slid to make the arc-shaped slider 526 slide along the arc-shaped slide groove 525, thereby adjusting the deflection angle of the guide tube 51, that is, adjusting the puncture angle, and after adjustment, tighten the fastening bolt 527.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cryo-biopsy needle kit, comprising a puncture needle, a measuring needle and a biopsy needle for sequentially performing puncture, measurement and biopsy operations, characterized in that: The puncture needle is a disposable coaxial puncture biopsy needle, which includes a needle sleeve and a needle core inserted therein. The outer diameters of the measuring needle and the biopsy needle are consistent with the needle core and are inserted into the needle sleeve one after the other. A guiding device is also provided, which is used to install the puncture needle, measuring needle and biopsy needle. The guiding device switches the needle core and the measuring needle and inserts them into the needle sleeve in sequence and guides the axial movement. The guiding device supports multiple reciprocating switching of the needle core and the measuring needle for repeated measurement. The guiding device is also used to position and install the biopsy needle and insert it into the needle sleeve.

2. The cryo-biopsy needle kit according to claim 1, characterized in that: The lengths of the needle core and the measuring needle are both greater than the needle sleeve. The needle core includes a first needle tail and a needle head from top to bottom, and the measuring needle includes a second needle tail, a measuring needle body and a measuring tip from top to bottom. The diameter of the measuring tip is smaller than the measuring needle body, and the end of the measuring tip is blunt. The side of the second needle tail is evenly provided with multiple rows of ridges for rotating the measuring needle.

3. The cryo-biopsy needle kit according to claim 1, characterized in that: The guiding device comprises a guiding tube, the bottom end of which is a cylinder and the other parts are semi-cylindrical. The guiding tube is adhered to the body surface through an adhesive seat, the needle sleeve is crimped between the guiding tube and the adhesive seat, and the bottom end of the needle sleeve extends through and below the adhesive seat.

4. The cryo-biopsy needle kit according to claim 3, characterized in that: The pasting seat comprises a pasting plate and a sleeve ring arranged at the center of its top, and the sleeve ring is clamped and sleeved on the outside of the bottom end of the guide tube. The pasting plate is pasted on the skin surface through the medical double-sided adhesive sticker at the bottom.

5. The cryo-biopsy needle kit according to claim 3, characterized in that: The adhesive seat includes an adhesive ring piece, which is adhered to the skin surface by a medical double-sided adhesive sticker at the bottom. A semicircular ring is vertically installed between the two opposite sides of the top of the adhesive ring piece, and an arc-shaped slide groove is formed inside the semicircular ring. An arc-shaped slider is slidably arranged inside the arc-shaped slide groove, and the arc-shaped slider is locked with the arc-shaped slide groove by a fastening bolt passing through the rear side of the arc-shaped slide groove, and an arc-shaped positioning groove adapted to the fastening bolt is opened on the rear side of the arc-shaped slide groove, and an insertion rod that can be engaged with the interior of the arc-shaped slider is fixedly connected to the back side of the guide cylinder.

6. The cryo-biopsy needle kit according to claim 1, characterized in that: A guide frame is placed inside the guide cylinder, and the guide frame includes a turntable that rotates with the bottom of the inner cavity of the guide cylinder, and C-shaped cylinders are symmetrically connected to the top of the turntable. The opening of the C-shaped cylinder is opened radially outward, and the top edges of the first needle tail and the second needle tail both extend out of the opening of the C-shaped cylinder. Convex rubber points are provided on both sides of the inner wall of the C-shaped cylinder near the top to engage the first needle tail and the second needle tail.

7. The cryo-biopsy needle kit according to claim 1, characterized in that: The two C-shaped cylinders are connected by a connecting plate, and a top cover is fixed to the top of the connecting plate by bolts, and the top cover is sleeved on the outside of the top end of the guide cylinder to keep it coaxial with the guide cylinder, a magnetic sheet is fixedly connected to the bottom of the turntable, and a groove matching the magnetic sheet is provided at the bottom of the inner surface of the guide cylinder, the turntable is magnetically attracted to the bottom of the inner surface of the guide cylinder through the magnetic sheet, positioning protrusions are provided on both sides of the bottom of the turntable, and a concave point matching the positioning protrusion is provided at the bottom of the inner surface of the guide cylinder, and the concave point cooperates with the positioning protrusion to perform positioning when the guide frame rotates 180°.

8. The cryo-biopsy needle kit according to claim 1, characterized in that: The biopsy needle is a cryo-rotational biopsy needle, which is mounted on the guide tube through a mounting member and makes the cryo-rotational biopsy needle coaxial with the needle sleeve.

9. The cryo-biopsy needle kit according to claim 8, characterized in that: The mounting member comprises a D-shaped sleeve for sleeved on the outside of the guide tube, a rubber sleeve is provided on the plane side fixing sleeve of the D-shaped sleeve, and the biopsy needle is elastically bound to the D-shaped sleeve through the rubber sleeve.

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