Bone ring drill capable of positioning and guiding

Abstract

The utility model discloses a bone trephine capable of positioning and guiding, which comprises a trephine body, a puncture needle, a guide needle and a guide tube, and the trephine body comprises a cylinder, a connecting rod and a handheld rotating handle; the connecting rod and the barrel are coaxially arranged and fixedly connected to the top of the barrel, and the handheld rotating handle is fixedly connected to the peripheral side of the top of the connecting rod; sawteeth are arranged at the bottom of the barrel; the guide pipe is coaxially arranged in the bottom of the barrel, and a plurality of blades are circumferentially distributed between the guide pipe and the barrel along the axis; the connecting rod is provided with a positioning hole penetrating into the cylinder from the top, and the positioning hole and the guide pipe are coaxially arranged; one end of the puncture needle is used for being driven into a bone drilling position, the guide needle is sleeved with the puncture needle, the trephine body is arranged on the guide needle in a sleeved mode through the guide pipe and the positioning hole, and bone drilling is conducted with the direction of the guide needle as a guide. The guide pipe is used for guiding the drilling direction of the bone trephine, so that a drilled bone is prevented from obliquely entering a spinal canal, and spinal cord injury or nerve center injury and pain of a patient are avoided.

Description

TECHNICAL FIELD

[0001] The utility model discloses a bone ring drill of positioning and guiding belongs to the technical field of bone ring drill. BACKGROUND

[0002] The lumbar vertebrae infection accounts for most of the spinal column infection, and the infection is caused by many reasons, such as lumbar vertebrae tuberculous infection, lumbar vertebrae bacterial infection, lumbar vertebrae brucella infection and lumbar vertebrae fungus infection. For lumbar vertebrae infection, pathological diagnosis and pathogenic bacteria culture of focus tissue are needed to take the focus part of the vertebral body to make clear diagnosis. In order to test the bone pathological changes, the bone quality of the disease area is usually sampled and tested before operation, and then the operation is determined. The vertebral body is usually taken by transpedicular puncture biopsy operation, and the pathological examination and pathogenic bacteria culture of the focus tissue are carried out. At present, most of the bone samplers adopt bone ring drills, and the bone ring drill is usually composed of a cylinder, drill teeth and a hand rotating handle. The cylinder is a straight cylinder, and the lower end is a sawtooth. When using, the rotating handle is held and rotated, the sawtooth drill bit at the lower end is drilled into the bone, the drilling depth and direction are determined according to the hand feeling or experience, when the drill teeth drill through the bone, the bone block enters the cone cylinder, the drill bit is taken out, the bone block is taken out and tested. The above instrument and method are used to take the bone block, and the drilling direction needs to be judged and controlled by the experience of the operator. Once the drilling direction is inclined, the operation is dangerous, and spinal cord injury or central nervous system injury is easy to cause, even the patient is in pain or complications occur. Therefore, a bone ring drill of positioning and guiding needs to be designed. SUMMARY

[0003] The utility model provides a bone ring drill of positioning and guiding, and the drilling direction of the bone ring drill is guided through the guide pipe, the bone is avoided to be drilled into the spinal canal in an inclined manner, and spinal cord injury or central nervous system injury and patient pain are avoided.

[0004] In order to realize the above purpose, the utility model adopts the technical scheme that:

[0005] A positionable and guided bone ring drill comprises a ring drill body, a puncture needle, a guide needle and a guide tube, the ring drill body comprises a barrel, a connecting rod and a handheld rotary handle, the connecting rod is coaxially arranged with the barrel and fixedly connected to the top of the barrel, the handheld rotary handle is fixedly connected to the top of the connecting rod, the bottom of the barrel is provided with sawteeth, the guide tube is coaxially arranged in the bottom of the barrel, a plurality of blades are circumferentially distributed between the guide tube and the barrel along the axis, the inner side of each blade is fixedly connected with the guide tube, and the outer side of each blade is fixedly connected with the inner wall of the barrel, the connecting rod is provided with a positioning hole penetrating from the top to the barrel, the positioning hole is coaxially arranged with the guide tube, one end of the puncture needle is used for punching into a bone drilling position, the guide needle is sleeved in the puncture needle, the ring drill body is sleeved on the guide needle through the guide tube and the positioning hole, and the guide needle direction is used as a guide for drilling bone.

[0006] Further, the barrel located above the guide tube is also provided with two pairs of oppositely arranged bone taking holes.

[0007] Further, the bottom of the guide tube is provided with sawteeth.

[0008] Further, the number of the blades is four, and the four blades are circumferentially distributed at equal angles along the axis of the guide tube.

[0009] Further, the blade is a spiral-shaped blade.

[0010] The beneficial effects of the present application are as follows:

[0011] 1) The puncture needle is used for auxiliary selection of a puncture point and a puncture direction of a pedicle of a vertebral arch according to perspective positioning of a C-arm machine, the puncture point is a bone taking position, the puncture direction is a bone drilling direction, the guide needle is placed in the hollow puncture needle, the puncture needle is pulled out, the ring drill body is placed along the guide needle through the guide tube and the positioning hole on the ring drill body, and the guide needle is used as a guide to drill bone from the pedicle joint process to the vertebral body to drill off bone quality at the pedicle position, so that a working channel is established, and the initial puncture direction can be avoided during bone drilling.

[0012] 2) The blades are arranged between the guide tube and the barrel, not only play a connecting role, but also cut bone tissue during bone drilling, so that the bone tissue is cut into small pieces, the bone taking efficiency is improved, and the bone is taken out from the bone taking hole.

[0013] 3) The sawteeth are arranged at the bottom of the guide tube, which can assist in drilling and crushing bone tissue at the center of the barrel, and improve the cutting efficiency. DRAWINGS

[0014] The specific embodiments of the present application will be further described in detail below with reference to the drawings, in which:

[0015] Fig. 1 is a perspective view of the utility model;

[0016] Fig. 2 is a perspective view of the utility model from the bottom view;

[0017] Fig. 3 is a perspective view of the utility model of the guide tube and the blade;

[0018] Reference signs:

[0019] 1 - trephine body, 2 - guide tube, 3 - blade, 11 - barrel, 12 - connecting rod, 13 - handheld rotary handle, 14 - bone hole, 15 - positioning hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0021] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there can be a middle component. When a component is referred to as "disposed on" another component, it can be directly disposed on the other component or there can be a middle component. When a component is referred to as "disposed in the middle", it is not only disposed in the middle position, but also within the range defined by the middle. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] Reference Figs. 1 to 3As shown, a positionable and guided bone trephine includes a trephine body 1, a puncture needle, a guide needle and a guide tube 2, the trephine body 1 includes a barrel 11, a connecting rod 12 and a handheld rotary handle 13; the connecting rod 12 is coaxially arranged with the barrel 11 and fixedly connected at the top of the barrel 11, and the handheld rotary handle 13 is fixedly connected at the top of the connecting rod 12; the bottom of the barrel 11 is provided with sawteeth; the puncture needle is a commonly used spinal puncture needle in surgery, and the guide needle can select a suitable size of Kirschner wire according to the size; the guide tube 2 is coaxially arranged in the bottom of the barrel 1, and the barrel 11 is provided with two pairs of oppositely arranged bone taking holes 14 above the guide tube 2; a plurality of blades 3 are circumferentially distributed between the guide tube 2 and the barrel 11 along the axis, the inner side of each blade 3 is fixedly connected with the guide tube 2, and the outer side of each blade 3 is fixedly connected with the inner wall of the barrel 11; the number of blades 3 is four, and the four blades are circumferentially distributed at equal angles along the axis of the guide tube 2; the blade 3 is a spiral-shaped blade, and the cutting direction of the blade 3 is consistent with the cutting direction of the sawteeth; the blade 3 can be integrally cast with the guide tube 2, and the outer side of the blade 3 is welded and fixed with the barrel 11; the blade 3 is arranged between the guide tube 2 and the barrel 11, which not only plays a connecting role, but also can cut bone tissue during drilling, so that the bone tissue is cut into small pieces, which is convenient to take out from the bone taking hole 14 and improves the bone taking efficiency. The bottom of the guide tube 2 is provided with sawteeth, which can assist in drilling the bone tissue in the center of the barrel and improve the cutting efficiency. The connecting rod 12 is provided with a positioning hole 15 penetrating from the top to the barrel, and the positioning hole 15 is coaxially arranged with the guide tube 2; in use, one end of the puncture needle is punched into the bone drilling position, and the determination of the bone drilling position can be determined by perspective positioning through the commonly used C-arm machine in surgery, and the puncture point and the puncture direction of the pedicle are punched into the human lumbar vertebral body, the puncture point is the bone taking position, and the puncture direction is the bone drilling direction; the guide needle is placed in the hollow puncture needle, the puncture needle is pulled out, and the guide tube 2 and the positioning hole 15 on the trephine body 1 are placed along the guide needle into the trephine body, and the bone trephine is drilled from the pedicle joint processus to the vertebral body under the positioning and guiding action of the guide needle to remove the bone quality in the pedicle position, and a working channel is established, which can avoid the inclination of the initial puncture direction during bone drilling.

[0024] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit them, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the scope of the technical solutions of the present application.

Claims

1. A steerable bone trephine comprising, The application relates to a trephine body, a puncture needle, a guide needle and a guide tube, wherein the trephine body comprises a cylinder, a connecting rod and a hand-held rotary handle; the connecting rod is coaxially arranged on the cylinder and fixedly connected to the top of the cylinder; the hand-held rotary handle is fixedly connected to the top of the connecting rod; the bottom of the cylinder is provided with sawteeth; the guide tube is coaxially arranged in the bottom of the cylinder; a plurality of blades are circumferentially arranged on the axis between the guide tube and the cylinder; the inner side of each blade is fixedly connected to the guide tube; the outer side of each blade is fixedly connected to the inner wall of the cylinder; the connecting rod is provided with a positioning hole penetrating from the top to the cylinder; the positioning hole is coaxially arranged on the guide tube; one end of the puncture needle is used for punching into a bone drilling position; the guide needle is sleeved in the puncture needle; the trephine body is sleeved on the guide needle through the guide tube and the positioning hole, and the guide needle direction is used for guiding bone drilling.

2. A positionable guided bone ring drill according to claim 1, wherein, The cylinder is provided with two pairs of oppositely arranged bone taking holes above the guide tube.

3. The positionable guided bone ring drill of claim 1, wherein, The bottom of the guide tube is provided with sawteeth.

4. The positionable guided bone ring drill of claim 1, wherein, The number of the blades is four; the four blades are circumferentially arranged at equal angles of the axis of the guide tube.

5. A directable bone tunneling reamer according to claim 4, wherein, The blade is a spiral blade.

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