CN219962988U

CN219962988U - Hollow bone drill

Info

Publication number: CN219962988U
Application number: CN202321098112.6U
Authority: CN
Inventors: 郭浩; 陈华; 汤俊君; 张军; 唐佩福; 胡星星; 王中鹤; 曹文豪; 陈志广
Original assignee: Fourth Medical Center General Hospital of Chinese PLA
Current assignee: Fourth Medical Center General Hospital of Chinese PLA
Priority date: 2023-05-09
Filing date: 2023-05-09
Publication date: 2023-11-07
Anticipated expiration: 2033-05-09

Abstract

The utility model discloses a hollow bone drill, which belongs to the technical field of medical appliances, and comprises a hollow drill, a connector, a bone block collector and a push rod, wherein: the lower end of the hollow drill is provided with a cutting edge for circular cutting of bones, and the upper part of the hollow drill is provided with a first limit structure; the connector comprises a sleeve part and a driving part, wherein the sleeve part is used for being sleeved on the upper part of the hollow drill, the driving part is positioned on the sleeve part and used for being connected with an external power instrument, and a second limiting structure matched with the first limiting structure is arranged on the sleeve part; the bone block collector comprises a barrel body which is sleeved on the hollow drill; one end of the ejector rod is provided with a pushing table for pushing the bone blocks in the hollow drill into the bone block collector. In the utility model, a plurality of parts are combined for use, the structure is simple, the operation is convenient, and the complete bone block can be obtained. And in addition, the sterilization and reuse are convenient due to the adoption of a plurality of independent parts.

Description

Hollow bone drill

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a hollow bone drill.

Background

In surgical and orthopedic operations, it is often necessary to perform autogenous or allogeneic bone grafting when bone defects, orthopedics, or guiding bone growth are encountered; bone is generally harvested by using a bone knife or rongeur when harvesting autologous bone. These two ways have the following problems when taking bones: 1. the bone knife needs multiple types, is inconvenient to operate and is complex to take out bones; 2. complete regular bone pieces cannot be obtained.

In order to solve the problems, the prior art presents an annular bone taking device, such as an utility model patent CN215534793U discloses an annular bone taking device for femoral head necrosis, which comprises a hollow drill bone sleeve for annular bone taking, four annular equally-distributed pressure relief grooves are formed in the outer wall of the hollow drill bone sleeve, an extrusion block for taking bones is arranged in the hollow drill bone sleeve, the extrusion block is in sliding connection with the pressure relief grooves, three hand screws for fastening the extrusion block are arranged at the top of the hollow drill bone sleeve, an extrusion push rod for pushing the extrusion block to discharge bone columns in the hollow drill bone sleeve is arranged at the top of the extrusion block, the extrusion push rod penetrates through the pressure relief grooves, and a pushing ring for extruding spareribs in cooperation with the extrusion push rod is arranged at the top of the hollow drill bone sleeve.

Said invented patent can ensure the integrity of bone column, but its structure is complex, and its use is still inconvenient.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the hollow bone taking drill which is simple in structure, convenient to operate and capable of taking complete bone blocks.

In order to solve the technical problems, the utility model provides the following technical scheme:

a hollow bone drill, includes hollow drill, connector, bone piece collector and ejector pin, wherein:

the lower end of the hollow drill is provided with a cutting edge for circular cutting of bones, the upper part of the hollow drill is provided with a first limit structure, and the side wall of the hollow drill is provided with a perspective window;

the connector comprises a sleeve part and a driving part, wherein the sleeve part is sleeved on the upper part of the hollow drill, the driving part is positioned on the sleeve part and used for connecting an external power instrument, and a second limiting structure matched with the first limiting structure is arranged on the sleeve part;

the bone block collector comprises a barrel body sleeved on the hollow drill;

one end of the ejector rod is provided with a pushing table for pushing the bone blocks in the hollow drill into the bone block collector.

Further, the first limiting structure is a pair of limiting columns positioned on two sides of the upper portion of the hollow drill, and the second limiting structure is a first limiting groove with an opening at the lower end.

Further, a third limiting structure for limiting the insertion depth of the core drill in the bone block collector is arranged on the barrel body.

Further, the third limiting structure is a second limiting groove with an opening at the lower end and matched with the pair of limiting columns.

Further, the first limiting groove is Z-shaped, and/or the second limiting groove is U-shaped.

Further, a reinforcing sleeve is arranged at the upper part of the hollow drill, and the pair of limit posts are arranged on the reinforcing sleeve in a penetrating manner;

and/or the inner diameter of the hollow drill gradually increases from bottom to top;

and/or the inner surface of the lower part of the hollow drill is provided with spiral chip guiding convex ribs.

Further, the driving part is a triangular prism structure with three concentric arcs formed by cutting on the basis of a cylinder, and a circumferential positioning groove is formed in the middle of the driving part.

Further, one end of the barrel body is opened, and the other end of the barrel body is closed.

Further, the closed end of the barrel body is provided with an annular boss.

Further, an anti-sliding table is arranged at the other end of the ejector rod;

and/or the length of the top rod is greater than the assembled length of the core drill and the bone block collector.

The utility model has the following beneficial effects:

when the hollow bone taking drill is used, firstly, the hollow drill and the connector are assembled, and the bone taking in a patient is realized by combining an external power instrument, then, the connector is taken down, the hollow drill and the bone collecting device are assembled, and the bone blocks in the hollow drill are pushed into the bone collecting device by using the ejector rod, so that the bone blocks are completely taken out, and the bone blocks are protected to reduce cross infection. In the utility model, a plurality of parts are combined for use, the structure is simple, the operation is convenient, and the complete bone block can be obtained. And in addition, the sterilization and reuse are convenient due to the adoption of a plurality of independent parts.

Drawings

FIG. 1 is a schematic view of the overall structure of a hollow bone drill of the present utility model;

FIG. 2 is a schematic view of the core drill of FIG. 1;

FIG. 3 is a schematic view of the connector of FIG. 1;

FIG. 4 is a schematic view of the bone block collector of FIG. 1;

fig. 5 is a schematic structural view of the ejector pin in fig. 1.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The utility model provides a hollow bone drill, as shown in figures 1-5, comprising a hollow drill 1, a connector 2, a bone block collector 3 and a push rod 4, wherein:

the lower (direction shown by arrow in figure 1) end of the hollow drill 1 is provided with a cutting edge 11 for circular cutting bone, the upper part is provided with a first limit structure, the side wall of the hollow drill 1 is provided with perspective windows 13, and the perspective windows 13 can be provided with a plurality of staggered structures, so that the positions of bone blocks can be conveniently observed and the bone blocks can be conveniently taken out;

the connector 2 comprises a sleeve part 21 sleeved on the upper part of the hollow drill 1 and a driving part 22 positioned on the sleeve part 21 and used for connecting an external power instrument, and a second limiting structure matched with the first limiting structure is arranged on the sleeve part 21;

the bone block collector 3 comprises a barrel 31 which is sleeved on the hollow drill 1, and the bone block collector 3 which is arranged independently can conveniently take out the bone blocks in the hollow drill 1;

one end of the ejector rod 4 is provided with an ejector table 41 (specifically, a round table) for ejecting the bone block in the hollow drill 1 into the bone block collector 3.

During operation, a patient is anesthetized at first, an opening is formed in a position where a bone needs to be taken, then a sleeve part 21 of a connector 2 is sleeved on a hollow drill 1, a first limiting structure of the hollow drill 1 is matched with a second limiting structure of the connector 2, a driving part 22 of the connector 2 is connected with an external power device (such as an electric drill and the like), the external power device drives the hollow drill 1 to rotate through the limiting structure, the hollow drill 1 cuts the bone through a cutting edge 11 at the bone taking position, penetrates contralateral cortical bone, then the connector 2 is taken down, the hollow drill 1 is placed in a barrel 31 of a bone block collector 3, a push table 41 of the push rod 4 is held by a hand to slowly push bone blocks (autologous bone) in the hollow drill 1, and the bone blocks are separated from the hollow drill 1 and then enter the barrel 31 of the bone block collector 3, so that bone taking is completed.

When the hollow bone taking drill is used, firstly, the hollow drill and the connector are assembled, and the bone taking in a patient is realized by combining an external power instrument, then, the connector is taken down, the hollow drill and the bone collecting device are assembled, and the bone blocks in the hollow drill are pushed into the bone collecting device by using the ejector rod, so that the bone blocks are completely taken out, and the bone blocks are protected to reduce cross infection. In the utility model, a plurality of parts are combined for use, the structure is simple, the operation is convenient, and the complete bone block can be obtained. And in addition, the sterilization and reuse are convenient due to the adoption of a plurality of independent parts. The utility model can provide support and meet the requirements of bone grafting when bone is in defect or orthopedic operation.

The first limit structure of the core drill 1 and the second limit structure of the connector 2 may be in various manners that can be easily considered by those skilled in the art, for example, the first limit structure is an external gear located at the upper portion of the core drill 1, and the second limit structure is an internal gear located at the inner side of the sleeve portion 21 of the connector 2 and matched with the external gear, however, for convenience in implementation, the following structural forms are preferably adopted:

as shown in fig. 1 to 3, the first limiting structure is a pair of limiting posts 12 (which can be specifically inserted and welded) located on two sides of the upper portion of the core drill 1, and the second limiting structure is a first limiting groove 211 (which can be specifically Z-shaped) with an opening at the lower end. In use, a pair of limiting posts 12 enter from the opening and are clamped in the first limiting groove 211, and the external power device can drive the hollow drill 1 to rotate to take out bone.

In order to facilitate pushing the bone block in the hollow drill 1 into the bone block collector 3, a third limiting structure for limiting the insertion depth of the hollow drill 1 in the bone block collector 3 can be arranged on the barrel 31 of the bone block collector 3, and the third limiting structure can axially position the hollow drill 1 so as to facilitate taking out the bone block.

The third limit structure can be implemented in various ways that can be easily thought by those skilled in the art, for example, an annular boss that is matched with the side wall of the hollow drill 1 and does not affect pushing out of the bone block is arranged in the barrel 31, however, for convenience in implementation, the following structural form is preferably adopted:

as shown in fig. 4, the third limiting structure on the barrel 31 of the bone block collector 3 is a second limiting groove 311 (may be specifically U-shaped) with an opening at the lower end and matched with the pair of limiting posts 12. When the bone block collector is used, the pair of limiting posts 12 enter the second limiting groove 311 to position the hollow drill 1, the inner hole of the bone block collector 3 is matched with the outer wall of the hollow drill 1, the hollow drill 1 can be limited to rotate and move, bone blocks can be conveniently taken out, and the bone blocks are protected to reduce cross infection.

As shown in fig. 2, in order to enhance the strength of the mating portion of the core drill 1 and the connector 2, the upper portion of the core drill 1 may be provided with a reinforcing sleeve 14, and a pair of stopper posts 12 may be penetrated through the reinforcing sleeve 14.

Referring to fig. 1, when pushing the bone block in the core drill 1 into the bone block collector 3, the bone block collector 3 is sleeved on the upper portion of the core drill 1, and the ejector rod 4 is pushed from the side close to the cutting edge of the core drill 1 to the side far away from the cutting edge, so that the inner diameter of the core drill 1 is preferably gradually increased from bottom (i.e. the cutting edge side) to top, so that the bone block is easier to push out of the core drill 1, and the integrity of the bone block is maintained.

The lower inner surface of the hollow drill 1 can be provided with spiral chip guide convex ribs (not shown), so that bone chips generated in the bone taking process can be timely discharged from the screw chip guide convex ribs to the perspective window 13, the chip removal effect is good, and adverse effects on operations are reduced.

As shown in fig. 3, the driving portion 22 of the connector 2 may have various conventional structures in the art, specifically may be a triangular prism structure with three concentric arcs formed by cutting on the basis of a cylinder, and the middle portion of the driving portion 22 may be provided with a circumferential positioning groove 221, so that the driving portion can be matched with various power devices.

As shown in fig. 4, to facilitate the collection of bone fragments by the bone fragment collector 3, one end of the tub 31 may be opened and the other end may be closed. The closed end of the barrel 31 may be provided with an annular boss 312 to facilitate the handling of the bone fragment collector 3 by a user.

As shown in fig. 5, the other end (the end far away from the pushing table 41) of the ejector rod 4 may be provided with an anti-sliding table 42 (specifically, may be a round table), so as to increase the firmness when the user holds the device. The length of the ejector rod 4 is preferably longer than the assembled length of the core drill 1 and the bone block collector 3, so that the hand is prevented from touching the cutting edge 11 of the core drill 1 to scratch during use, and the safety is improved.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims

1. The utility model provides a hollow bone drill of getting which characterized in that includes hollow drill, connector, bone piece collector and ejector pin, wherein:

the bone block collector comprises a barrel body sleeved on the hollow drill;

2. The core drill of claim 1, wherein the first limiting structure is a pair of limiting posts positioned on two sides of the upper portion of the core drill, and the second limiting structure is a first limiting groove with an opening at the lower end.

3. The core drill according to claim 2, wherein the barrel is provided with a third limit structure for limiting the insertion depth of the core drill into the bone block collector.

4. The bone drill of claim 3, wherein the third limiting structure is a second limiting groove having an opening at a lower end and cooperating with the pair of limiting posts.

5. The core drill of claim 4, wherein the first limit slot is Z-shaped and/or the second limit slot is U-shaped.

6. The hollow bone drill according to claim 2, wherein a reinforcing sleeve is arranged at the upper part of the hollow drill, and the pair of limit posts are arranged on the reinforcing sleeve in a penetrating manner;

7. The hollow bone drill according to claim 1, wherein the driving part is a triangular prism structure with three concentric arcs formed by cutting on the basis of a cylinder, and a circumferential positioning groove is formed in the middle of the driving part.

8. The core drill according to claim 1, wherein one end of the barrel is open and the other end is closed.

9. The hollow bone drill of claim 8, wherein the closed end of the barrel is provided with an annular boss.

10. The hollow bone drill according to claim 1, wherein the other end of the ejector rod is provided with an anti-sliding table;