CN218870342U

CN218870342U - Rotary cutting type biopsy needle

Info

Publication number: CN218870342U
Application number: CN202320024076.2U
Authority: CN
Inventors: 顾雨森; 郭旭英
Original assignee: Jingmai Medical Technology Nantong Co ltd; Shanghai Robo Robot Technology Co ltd; Shanghai Jingmai Medical Technology Co ltd
Current assignee: Jingmai Medical Technology Nantong Co ltd; Shanghai Robo Robot Technology Co ltd; Shanghai Jingmai Medical Technology Co ltd
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-04-18
Anticipated expiration: 2033-01-05

Abstract

The utility model provides a rotary cutting type biopsy needle, which comprises an outer needle component and an inner needle component, wherein the outer needle component comprises a needle base and an outer sleeve fixedly arranged at one end of the needle base, and the inner needle component comprises a handle and an inner needle core fixedly arranged on the handle; a through hole is arranged in the needle base, one end of the through hole is communicated with the outer sleeve, the inner needle core is sequentially inserted into the needle base and the outer sleeve from the other end of the through hole until the tip end extends out of the end part of the outer sleeve, and the handle is rotatably arranged at the other end of the needle base; the inner needle core is provided with a hollow structure, the side surface of the end part of the inner needle core is provided with an inner needle core notch, and the side surface of the end part of the outer sleeve is correspondingly provided with an outer sleeve notch with the size consistent with that of the inner needle core notch. The utility model discloses can realize shielding when the puncture, open functional requirement when applicable has kept the convenient condition of current pjncture needle to can satisfy the functional requirement of coaxial rotary-cut, the tissue damage that causes with the huge resilience structure of traditional pull formula pjncture needle is different, and the rotary-cut is softer the damage littleer.

Description

Rotary cutting type biopsy needle

Technical Field

The utility model relates to the technical field of medical equipment, specifically, relate to a rotary-cut formula biopsy needle.

Background

In medical diagnostic practice, it is often necessary to perform a biopsy to remove a tissue or fluid sample of a patient for a case study. Clinical biopsy needle on the market adopts hard pull back biopsy mode of adopting mostly at present, and this kind of simple easy operation of technique just gets the tissue more, nevertheless because rebound biopsy triggers recoil too big, generally leads to the fact great wound to the patient, and the aspiration biopsy process can be accompanied with tissue damage usually, the scheduling problem that bleeds.

Chinese patent No. 201821125509.9 discloses a rotary-cut biopsy needle. This patent describes a method of rotary-cut biopsy, coupled with a back-end vacuum suction function. But the puncture biopsy process becomes complicated with the attached rear end vacuum adsorption device, and the vacuum adsorption has certain uncontrollable nature, has certain damage to patient's health, simultaneously because the knife edge incision of the outer needle cover in this patent directly runs through the tip, can appear warping in the in-process of puncture sample, damages other tissues to and the condition that non-target tissue got into and pollutes the sample tissue in the sample space.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims at providing a rotary cutting type biopsy needle.

According to the utility model provides a rotary cutting type biopsy needle, which comprises an outer needle component and an inner needle component, wherein the outer needle component is sleeved outside the inner needle component, the outer needle component comprises a needle seat and an outer sleeve fixedly arranged at one end of the needle seat, and the inner needle component comprises a handle and an inner needle core fixedly arranged on the handle;

a through hole is arranged in the needle base, one end of the through hole is communicated with the outer sleeve, the inner needle core is provided with a tip, the inner needle core is sequentially inserted into the needle base and the outer sleeve from the other end of the through hole until the tip extends out of the end part of the outer sleeve, and the handle is rotatably arranged at the other end of the needle base;

the novel needle core is characterized in that a hollow structure is arranged in the inner needle core, an inner needle core notch is formed in the side face of the end portion of the inner needle core, an outer sleeve notch is formed in the side face of the end portion of the outer sleeve, and the inner needle core notch corresponds to the outer sleeve notch in size and is consistent with the outer sleeve notch in size.

Preferably, in axial projection, the opening angle of the inner hub cut is the same as the opening angle of the outer cannula cut.

Preferably, in the axial projection, a forward cutting edge is arranged at one side edge or two side edges of the outer cannula notch, and a reverse cutting edge corresponding to the forward cutting edge is arranged at the edge of the inner stylet notch.

Preferably, the angle of inclination of the forward cutting edge is the same as the angle of inclination of the reverse cutting edge.

Preferably, the included angle between the tangent lines of the forward cutting edge and the outer sleeve at the end part of the forward cutting edge is 70 degrees, and the included angle between the reverse cutting edge and the tangent line of the inner needle core at the end part of the reverse cutting edge is 70 degrees.

Preferably, the outer surface of the handle is provided with a rotation indication arrow pointing in the direction of rotation of the handle.

Preferably, the outer surface of the handle and the outer surface of the needle seat are both provided with opening alignment indication arrows;

the alignment of the opening in the handle indicates that the arrow is aligned with the inner hub cut and the alignment of the opening in the hub indicates that the arrow is aligned with the outer cannula cut.

Preferably, the other end of the needle seat is inserted into the handle, a parallel sliding groove is circumferentially formed in the outer side of one end, connected with the handle, of the needle seat, a protruding column protruding inwards is arranged on the inner side of one end, connected with the needle seat, of the handle, and the protruding column is arranged inside the parallel sliding groove in a sliding mode.

Preferably, the tip of the inner needle core is wedge-shaped or conical;

the inner needle core cut and the outer sleeve cut are both in a round corner rectangle or a rectangle.

Preferably, the rear 3-3.5mm of the tip of the inner needle core is of a solid structure, the distance of the cut of the inner needle core from the tip is 4.5-5mm, and the length of the cut of the inner needle core is 11-13mm.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses simple structure, convenient operation corresponds on stylet and outer tube including the adoption and sets up stylet incision and the notched technical means of outer tube to can be so that shield when the puncture, open functional requirement when applicable has kept the convenient condition of current pjncture needle promptly, by the service function demand that can satisfy coaxial rotary-cut, it is different with the tissue damage that this kind of huge resilience structure of traditional pull formula pjncture needle caused, the rotary-cut is softer the damage littleer in sampling process more.

2. The utility model discloses a technical means with the similar reverse blade of scissors and forward blade improves the incision sharpness to can downcut the tissue effectively.

3. The utility model discloses a along the technological means of circumference setting parallel spout, can freely adjust the rotation amount when making the doctor use, compare biopsy gun on the market and can only once fire and get to examine, this design can relapse many times and cut the tissue sample, can be according to doctor's demand adjustment sample volume.

4. The utility model discloses a parallel spout of needle file and the abrupt post complex technical means of handle inner wall to the interior needle subassembly can not rock in the use, and the interior needle subassembly also can not break away from in the outer needle subassembly at the puncture in-process.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the outer needle assembly of the present invention;

FIG. 3 is a schematic structural view of the inner needle assembly of the present invention;

fig. 4 is a schematic structural view of the middle needle base of the present invention;

FIG. 5 is a schematic structural view of the handle of the present invention;

FIG. 6 is a schematic view of the structure of the needle tip of the present invention;

FIG. 7 is a schematic cross-sectional view of the cut of the outer sleeve of the present invention;

fig. 8 is a schematic cross-sectional view of the cut of the inner needle core of the present invention.

The figures show that:

outer sleeve 1 inner needle core incision 6

Needle stand 2 protruding column 7

Parallel sliding groove 8 of outer sleeve notch 3

Inner needle core 4 rotation indication arrow 9

Handle 5 opening alignment indication arrow 10

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will aid those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. All of which belong to the protection scope of the present invention.

The utility model discloses a rotary-cut formula biopsy needle can satisfy and shield when the puncture, and open functional requirement when applicable, and the tissue damage that causes with this kind of huge resilience structure of traditional pull formula pjncture needle is different, adopts the scheme of coaxial rotary-cut, and soft damage is littleer more in sampling process.

According to the utility model, as shown in fig. 1-3, the rotary cutting type biopsy needle comprises an outer needle component and an inner needle component, wherein the outer needle component is sleeved outside the inner needle component, the outer needle component comprises a needle base 2 and an outer sleeve 1 fixedly arranged at one end of the needle base 2, and the inner needle component comprises a handle 5 and an inner needle core 4 fixedly arranged on the handle 5; a through hole is formed in the needle base 2, one end of the through hole is communicated with the outer sleeve 1, the inner needle core 4 is provided with a tip end, the inner needle core 4 is sequentially inserted into the needle base 2 and the outer sleeve 1 from the other end of the through hole until the tip end extends out of the end part of the outer sleeve 1, and the handle 5 can be rotatably arranged at the other end of the needle base 2;

preferably, the outer surface of said handle 5 is provided with a rotation indication arrow 9, said rotation indication arrow 9 pointing in the direction of rotation of the handle 5. The outer surface of the handle 5 and the outer surface of the needle seat 2 are both provided with opening alignment indication arrows 10; alignment of the opening in the handle 5 indicates that arrow 10 is aligned with the inner hub slit 6 and alignment of the opening in the hub 2 indicates that arrow 10 is aligned with the outer cannula slit 3.

As shown in fig. 6, the inner stylet 4 is provided with a hollow structure, the side surface of the end of the inner stylet 4 is provided with an inner stylet notch 6, the side surface of the end of the outer sleeve 1 is provided with an outer sleeve notch 3, and the inner stylet notch 6 and the outer sleeve notch 3 are correspondingly arranged and have the same size. In axial projection, the opening angle of the inner core cut 6 is the same as the opening angle of the outer sleeve cut 3. As shown in fig. 7-8, in the axial projection, one side edge or both side edges of the outer cannula incision 3 are provided with a forward cutting edge, and the edge of the inner core incision 6 is provided with a reverse cutting edge corresponding to the forward cutting edge. The inclination angle of the forward cutting edge is the same as that of the reverse cutting edge. The included angle between the tangent lines of the forward cutting edge and the outer sleeve 1 at the end part of the forward cutting edge is 70 degrees, and the included angle between the reverse cutting edge and the tangent line of the inner needle core 4 at the end part of the reverse cutting edge is 70 degrees. Preferably, the tip of the inner stylet 4 is wedge-shaped or conical; the inner needle core cut 6 and the outer sleeve cut 3 are rounded rectangles or rectangles, the pointed end of the inner needle core 4 is of a solid structure 3-3.5mm backwards, the distance from the inner needle core cut 6 to the pointed end is 4.5-5mm, and the length of the inner needle core cut 6 is 11-13mm.

As shown in fig. 4-5, the other end of the needle base 2 is inserted into the handle 5, a parallel sliding groove 8 is circumferentially arranged on the outer side of one end of the needle base 2 connected with the handle 5, a protruding column 7 protruding inwards is arranged on the inner side of one end of the handle 5 connected with the needle base 2, and the protruding column 7 is slidably arranged inside the parallel sliding groove 8. The rotation amount can be freely adjusted when making the doctor use, compares biopsy rifle on the market and can only once percussion get and examine, and this design can be repeated many times and cut the tissue sample, can adjust the sample volume according to the doctor demand, and the interior needle subassembly can not rock in the product use, and the needle subassembly can not break away from in the outer needle subassembly yet in the puncture in-process.

The utility model is used for multiple organ biopsy sample, during the use, through making outer tube incision 3 and interior needle core incision 6 arrive the focus position smoothly with the help of puncture passageway or direct puncture, interior needle core incision 6 is sealed by outer tube 1 in puncture process, form a confined pjncture needle structure, stop the puncture when treating interior needle core incision 6 aims at the target location, rotatory outer tube 1 this moment, make outer tube incision 3 and interior needle core incision 6 correspond completely, target tissue can enter into interior needle core incision 6 position lumen on every side, continue twist grip 5 this moment and make interior needle core 4 rotate, because outer tube incision 3 and interior needle core incision 6 structure form a similar scissors structure, the facet of interior needle core 4 carries out the rotary-cut to the tissue, final target tissue is cut down by interior needle core 4 and gets into interior needle core incision 6 position lumen, when outer tube 1 seals interior needle core incision 6 again, complete rotary-cut tissue sampling process. The biopsy needle is withdrawn, the tissue is retained within the needle and the sample is taken successfully.

During puncture, the inner needle core incision 6 is kept aligned with the opening alignment indication arrow 10 on the handle 5, after the sampling point is reached, the handle 5 is rotated according to the direction of the rotation indication arrow 9 on the handle 5 until the handle 5 is aligned with the opening alignment indication arrow 10 on the needle seat 2, at the moment, the outer sleeve incision 3 completely corresponds to the inner needle core incision 6, and then, the cutting surfaces of the inner needle incision and the outer needle incision are continuously rotated to extrude and cut tissues.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A rotary cutting type biopsy needle is characterized by comprising an outer needle assembly and an inner needle assembly, wherein the outer needle assembly is sleeved outside the inner needle assembly and comprises a needle base (2) and an outer sleeve (1) fixedly arranged at one end of the needle base (2), and the inner needle assembly comprises a handle (5) and an inner needle core (4) fixedly arranged on the handle (5);

a through hole is formed in the needle base (2), one end of the through hole is communicated with the outer sleeve (1), the inner needle core (4) is provided with a tip end, the inner needle core (4) is sequentially inserted into the needle base (2) and the outer sleeve (1) from the other end of the through hole until the tip end extends out of the end part of the outer sleeve (1), and the handle (5) is rotatably arranged at the other end of the needle base (2);

the novel needle core is characterized in that a hollow structure is arranged in the inner needle core (4), an inner needle core notch (6) is arranged on the side face of the end portion of the inner needle core (4), an outer sleeve notch (3) is arranged on the side face of the end portion of the outer sleeve (1), the inner needle core notch (6) and the outer sleeve notch (3) are correspondingly arranged, and the size of the inner needle core notch and the size of the outer sleeve notch are consistent.

2. Rotational atherectomy biopsy needle according to claim 1, wherein the opening angle of the inner core cut (6) is the same as the opening angle of the outer cannula cut (3) in axial projection.

3. The rotary-cut biopsy needle according to claim 1, wherein, in axial projection, one side edge or both side edges of the outer cannula incision (3) are provided with a forward cutting edge, and the edge of the inner needle core incision (6) is provided with a reverse cutting edge corresponding to the forward cutting edge.

4. The rotational atherectomy biopsy needle of claim 3, wherein the forward cutting edge is inclined at the same angle as the reverse cutting edge.

5. The rotational atherectomy biopsy needle of claim 4, wherein the angle between the forward cutting edge and the tangent to the outer cannula (1) at the end of the forward cutting edge is 70 °, and the angle between the reverse cutting edge and the tangent to the inner core (4) at the end of the reverse cutting edge is 70 °.

6. Rotational atherectomy biopsy needle according to claim 1, wherein the outer surface of the handle (5) is provided with a rotation indication arrow (9), the rotation indication arrow (9) pointing in the direction of rotation of the handle (5).

7. Rotational atherectomy biopsy needle according to claim 1, wherein the outer surface of the handle (5) and the outer surface of the needle hub (2) are provided with open alignment indication arrows (10);

the opening alignment indication arrow (10) on the handle (5) is aligned with the inner core cut (6), and the opening alignment indication arrow (10) on the needle seat (2) is aligned with the outer sleeve cut (3).

8. The rotary-cut biopsy needle according to claim 1, wherein the other end of the needle holder (2) is inserted into the handle (5), parallel sliding grooves (8) are circumferentially formed in the outer side of the end of the needle holder (2) connected with the handle (5), inward protruding studs (7) are arranged on the inner side of the end of the handle (5) connected with the needle holder (2), and the studs (7) are slidably arranged inside the parallel sliding grooves (8).

9. The rotational atherectomy biopsy needle of claim 1, wherein the tip of the inner core (4) is wedge-shaped or cone-shaped;

the inner stylet incision (6) and the outer cannula incision (3) are both in a round corner rectangle or a rectangle.

10. The rotary atherectomy biopsy needle of claim 1, wherein the tip of the inner core (4) is of solid construction 3-3.5mm back, the inner core cut (6) is 4.5-5mm from the tip, and the length of the inner core cut (6) is 11-13mm.