CN215605925U

CN215605925U - Marrow biopsy needle

Info

Publication number: CN215605925U
Application number: CN202121319154.9U
Authority: CN
Inventors: 徐孙希
Original assignee: Shanghai Hongchuang Medical Technologies Co ltd
Current assignee: Shanghai Hongchuang Medical Technologies Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2022-01-25
Anticipated expiration: 2031-06-10

Abstract

The utility model provides a marrow biopsy needle, which comprises a needle core, a sampling needle and a sampling sleeve, wherein the distal end of the needle core is provided with a core tip, and the distal end of the sampling needle is provided with a rotary cutting edge part; the needle core is arranged in the sampling needle in a penetrating way, and the core tip extends out of the far end of the sampling needle; the sampling needle is arranged in the sampling sleeve in a penetrating way, and the core tip extends out of the far end of the sampling sleeve; the bone marrow biopsy needle penetrates through the bone area through the core tip, and then the needle core is taken out; the sampling sleeve drives the needle core to continuously puncture into the marrow cavity, so that the marrow tissue enters the sampling needle; the sampling cannula stops puncturing, the rotary cutting edge part extends out of the far end of the sampling cannula, the sampling needle is rotated to cut the bone marrow tissue through the rotary cutting edge part, and the sampling needle is taken out.

Description

Marrow biopsy needle

Technical Field

The utility model relates to the technical field of medical instrument design, in particular to a marrow biopsy needle.

Background

Bone marrow biopsy operation, called bone marrow biopsy for short, is similar to bone marrow puncture, and is an operation method for understanding bone marrow state, and is characterized by that it uses a specially-made needle core to puncture the bone cortex under the guide of CT, then a section of cylindrical bone marrow tissue with 0.5-1 cm length is taken, so that it is applicable to diagnosis of various leukemia, malignant tumor, anemia and splenic hyperfunction, etc. and can be used for making cytological, pathogenic and pathological examination.

At present, in the puncture process of a common biopsy needle on the market, the biopsy needle is difficult and hard to take when facing a bone with higher hardness, the sample quantity is not enough, and the sampling capacity and efficiency are low.

SUMMERY OF THE UTILITY MODEL

To address the problems in the background art, the present invention provides a bone marrow biopsy needle, comprising:

a needle core, the distal end of which is provided with a core tip for puncture;

the sampling needle is provided with a rotary cutting edge part for cutting at the far end, and cutting is realized by rotating the rotary cutting edge part; the outer diameter of the needle core is matched with the inner diameter of the sampling needle, the needle core is arranged in the sampling needle in a removable penetrating mode, and the core tip extends out of the distal end of the sampling needle; and

the outer diameter of the sampling needle is matched with the inner diameter of the sampling sleeve, the sampling needle axially movably penetrates through the sampling sleeve, and the core tip extends out of the far end of the sampling sleeve.

In some embodiments, the core tip is a helical tip or a conical tip.

In some embodiments, the sampling needle is a hollow tubular structure with an open distal end, an opening is provided on the sidewall of the distal end of the sampling needle along the length direction of the sampling needle, and the opening extends to the distal end of the sampling needle, and the opening forms a rotary cutting edge portion.

In some embodiments, the two side edges of the opening are provided with saw teeth, and the saw teeth are arranged on one side close to the tail end.

In some embodiments, the openings have raised segments extending from both side edges at the ends.

In some embodiments, the sampling cannula distal end is necked down.

In some embodiments, the sampling cannula distal tip is provided with a threaded portion on an outer wall surface.

In some embodiments, the sampling sleeve is provided with scale marks on the outer wall surface along the length direction of the sampling sleeve.

In some embodiments, a needle core seat, a sampling needle seat and a sampling cannula seat which are used for connecting with the driving part are respectively and detachably connected on the proximal ends of the needle core, the sampling needle and the sampling cannula.

Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following advantages and positive effects:

1. the bone marrow biopsy needle provided by the utility model realizes bone puncture and bone marrow extraction through the mutual matching of the needle core, the sampling needle and the sampling sleeve, and has the advantages of good puncture effect, simple structure, convenience in operation, convenience in use and high sampling rate;

2. according to the bone marrow biopsy needle provided by the utility model, the core tip is arranged to be spiral, so that the needle has good puncture capability on hard bones;

3. the bone marrow biopsy needle provided by the utility model can well strip bone marrow tissues through the arrangement of the sawtooth part, is beneficial to improving the tissue cutting effect, quickens sampling and improves the sampling efficiency.

Drawings

The above and other features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic view of a needle core of a biopsy needle according to the present invention;

FIG. 2 is a schematic structural view of a sampling needle of the bone marrow biopsy needle provided by the present invention;

fig. 3 is a schematic structural diagram of a sampling cannula of a bone marrow biopsy needle provided by the present invention.

Detailed Description

The present invention will be described in more detail below with reference to the accompanying drawings, which illustrate embodiments of the utility model. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Referring to fig. 1-3, the present invention provides a bone marrow biopsy needle comprising a core 2, a sampling needle 7 and a sampling cannula 12, the distal end of the core 2 having a core tip 3, the distal end of the sampling needle 7 having a rotary cutting edge portion 8; the outer diameter of the stylet 2 matches the inner diameter of the sampling needle 7 so that the stylet 2 is removably inserted into the sampling needle 7 and the stylet tip 3 protrudes out of the distal end of the sampling needle 7; the outer diameter of the sampling needle 7 matches the inner diameter of the sampling sleeve 12 so that the sampling needle 7 is disposed through the sampling sleeve 12 and so that the core tip 3 protrudes out of the distal end of the sampling sleeve 12.

The needle core 2 is used for puncturing a bone area, the sampling needle 7 is used for obtaining bone marrow, and the sampling outer sleeve 12 is used for protecting and guiding the needle core 2 and the sampling needle 7 and preventing the needle core 2 and the sampling needle from bending in the operation process.

Initially, after the needle core 2, the sampling needle 7 and the sampling sleeve 12 are sleeved and assembled, only the core tip 3 extends out of the distal end of the sampling sleeve 12; the far end of the bone marrow biopsy needle penetrates through a bone area through the core tip, and the needle core 2 is taken away after the bone marrow biopsy needle is completed; the sampling cannula 12 and the needle core 7 are further punctured into the marrow cavity through the distal end of the sampling cannula, and only the marrow tissue can enter the sampling needle 7 in the process; after the bone marrow is punctured to a certain position, the sampling cannula 12 stops puncturing, the sampling needle 7 is moved independently to enable the rotary cutting edge part 8 to stretch out of the far end of the sampling cannula 12 and be inserted into the bone marrow, the rotary sampling needle 7 cuts the lower bone marrow tissue through the rotary cutting edge part 8, and finally the sampling needle is taken out to finish sampling of the bone marrow.

The marrow biopsy needle that this embodiment provided, through the extraction that bone puncture and marrow has been realized to mutually supporting between nook closing member 2, sampling needle 7 and sampling sleeve 12, puncture effectually, simple structure, convenient operation, convenient to use, the sample rate is high.

In the embodiment, as shown in fig. 1, the distal end of the needle core 2 passes through the core tip 3, so that the needle core 2 can better penetrate through bone and has good pushing performance; further, the core tip 3 is a spiral needle tip 4 or a conical needle tip 5, which is not limited herein and can be selected according to specific situations, and the core tips 3 with different shapes can respectively puncture bones with different hardness, wherein, for bones with greater hardness, the puncturing effect by using the spiral needle tip 4 is better.

In this embodiment, as shown in fig. 2, the sampling needle 7 is a hollow tubular structure with an open distal end, an opening is provided on the distal sidewall of the sampling needle 7 along the length direction thereof, and the opening extends to the distal end of the sampling needle, and two side edges of the opening form a rotary cutting edge portion 8. After the sampling needle 7 is axially moved and inserted into bone marrow, the sampling needle 7 is circumferentially rotated, so that the rotary cutting edge part 8 rotates to cut the bone marrow, and the sampling of the sampling needle 7 on the bone marrow is completed.

Furthermore, the two side edges of the opening are provided with saw-toothed portions 9, and the saw-toothed portions 9 are disposed near the distal end side of the sampling needle 7, although in other embodiments, the two side edges of the opening are provided with full saw-toothed portions 9, which is not limited herein. This embodiment is through setting up of serration portion 9, can be fine peel off the marrow tissue, be favorable to improving tissue cutting effect for the sample, turn up sampling efficiency.

Further, the opening is extended with a convex arc 10 on both side edges at the distal end of the sampling needle 7. The convex arc section 10 is beneficial to increasing the cutting effect on bone marrow tissues on one hand, and also has a supporting effect on fractured bone marrow tissues on the other hand, so that the bone marrow tissues obtained in the opening are prevented from falling off from the tail end, and the sampling efficiency is ensured.

In this embodiment, as shown in fig. 3, the distal end of the sampling cannula 12 is in the form of a constriction 13, i.e. the inner diameter of the end is smaller than the inner diameter of the sampling cannula 12; when the opening of sampling needle 7 passes through the distal end of sampling sleeve 12, play the effect of crimple to opening to realize the effect of the intraoral marrow tissue parcel of opening, thereby prevent to remove the in-process at sampling needle 7, the bone marrow tissue problem that drops has appeared, has guaranteed the effective rate of sample.

In this embodiment, as shown in FIG. 3, the outer wall surface of the distal end of the sampling cannula 12 is provided with a threaded portion to facilitate the axial movement of the sampling cannula 12 to penetrate into the bone marrow, enhancing the penetration effect. The threaded portion may be a short threaded portion 14 or a long threaded portion 15, which is not limited herein and may be adjusted according to specific situations.

In this embodiment, the outer wall surface of the sampling cannula 12 is provided with scale marks along the length direction thereof for prompting the puncture depth, so as to ensure that the needle core can be driven into the desired depth in the needle insertion process.

In this embodiment, referring to fig. 1-3, the proximal ends of the hub 2, the sampling needle 7 and the sampling cannula 12 are detachably provided with a hub holder 1, a sampling needle holder 6 and a sampling cannula holder 11, respectively.

Wherein, the back is established to nook closing member 2, sampling needle 7 and sampling sleeve 12 cover each other, and detachable links together between nook closing member seat 1, sample needle file 6 and the sampling sleeve seat 11 to the three removes or the motion separately of alternate segregation together, and concrete can establish modes such as connecting through the cover and realize, does not do the restriction here.

The needle core seat 1, the sampling needle seat 6 and the sampling sleeve seat 11 can be connected with a driving part specifically to realize respective movement, the driving part can be electric or manual, and the driving part is not limited and can be selected according to specific conditions.

It will be appreciated by those skilled in the art that the utility model can be embodied in many other specific forms without departing from the spirit or scope thereof. Although embodiments of the present invention have been described, it is to be understood that the present invention should not be limited to those precise embodiments, and that various changes and modifications can be effected therein by one skilled in the art without departing from the scope or spirit of the utility model as defined by the appended claims.

Claims

1. A bone marrow biopsy needle, comprising:

2. The bone marrow biopsy needle according to claim 1, wherein the core tip is a helical tip or a conical tip.

3. The needle of claim 1, wherein the sampling needle is a hollow tubular structure with an open distal end, and the sidewall of the distal end of the sampling needle is provided with an opening along its length, and the opening extends to the distal end of the sampling needle, and the opening forms a rotary cutting edge.

4. The needle of claim 3, wherein the opening has serrations on both side edges thereof, and the serrations are disposed on a side near a distal end.

5. The bone marrow biopsy needle according to claim 3, wherein the opening is extended with a convex arc section on two side edges at the terminal end.

6. The bone marrow biopsy needle of claim 1, wherein the sampling cannula distal tip is necked down.

7. The bone marrow biopsy needle according to claim 6, wherein the outer wall surface of the distal end of the sampling cannula is provided with a threaded portion.

8. The bone marrow biopsy needle according to claim 1, wherein the outer wall surface of the sampling cannula is provided with scale marks along the length direction thereof.

9. The bone marrow biopsy needle of claim 1, wherein a core needle seat, a sampling needle seat and a sampling cannula seat are detachably connected to the proximal ends of the core needle, the sampling needle and the sampling cannula, respectively.