CN113712626A

CN113712626A - Tubular bone inner wall osteotomy device

Info

Publication number: CN113712626A
Application number: CN202111104666.8A
Authority: CN
Inventors: 吴建锋; 官正茂
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2021-11-30
Anticipated expiration: 2041-09-22
Also published as: CN113712626B

Abstract

The invention discloses a tubular bone inner wall osteotome, comprising: a hollow tube with one end placed in the tubular bone and a connecting device for assisting the hollow tube to be stabilized in the tubular bone, the hollow tube being close to the open end of the tubular bone, The stabilizing device is close to the closed end of the tubular bone; and the eccentric column is placed in the hollow tube, the osteotome is slidably arranged in the hollow tube by the sliding device, and the opening on the wall of the hollow tube, so When the eccentric column is displaced in a direction close to the osteotome, it interferes with the osteotome, drives the osteotome to displace in the direction of the opening, and causes the movable osteotome to extend out of the hollow tube to perform an osteotomy operation on the tubular bone. The invention solves the problems of excessive exposure of surrounding soft tissue, heavy bleeding, peripheral periosteal annular severing injury, easy damage to peripheral important nerves and blood vessels, slow recovery, and complications of nonunion in the tubular bone osteotomy operation, and can reduce tissue trauma. to minimal technical effects.

Description

Tubular bone inner wall osteotomy device

Technical Field

The invention relates to the technical field of surgical instruments, in particular to a tubular bone inner wall osteotomy device.

Background

In orthopedic surgery, tubular bones are often required to be cut off, such as femur, tibia and humerus angulation deformity correction, tibia heightening and lengthening, lumbar tumor vertebral body accessory total-resection pedicle cutting, lumbar pedicle lengthening and the like. The current operation method is to expose the outer side wall of the tubular bone part and cut the bone by using an osteotome or a fretsaw, and has the problems of large wound, much damaged periosteum, easy damage to peripheral important nerve vessels and the like.

For example, with the increasing aging of society, the incidence of lumbar spinal stenosis is increasing, the elderly are difficult to undergo major surgery, the elderly at great general anesthesia risk are increasing, and minimally invasive treatment of lumbar spinal stenosis is an urgent problem. The minimally invasive pedicle extension operation can achieve the purpose of expanding the central spinal canal, the lateral crypt and the intervertebral foramen by extending the pedicle, can be carried out without cutting vertebral plates and treating intervertebral spaces, can be carried out under local anesthesia, and is a minimally invasive frontier operation mode for treating senile lumbar spinal stenosis; the pedicle lengthening operation needs to cut bones from the inner wall of the pedicle outwards, and the hard capsule, nerves and important blood vessels are easily damaged by cutting the bones in a side wall needle point-like annular shape, so that the popularization of the operation is limited.

For example, some patients have congenital femur varus deformity, which causes great confusion on the appearance and life of the patients and needs to correct the shape of the femur, however, in the existing femur deformity correction, a cut is made at the femoral cut and the femoral cut is performed at the cut, which has the defects of large cut, high tissue destruction degree and easy damage to important vascular nerves, while minimally invasive surgery is a common development trend in the clinical field at present and is a direction to be broken in the femur deformity correction.

For example, old legs of people are old first, knee joint varus deformity in knee joint degenerative diseases is more and more common, and high tibial osteotomy in knee protection surgery of old people needs osteotomy correction, however, in the existing high tibial osteotomy, a wound is formed at the high tibial osteotomy, and osteotomy operation is performed at the wound, so that the operation difficulty is high, the tissue damage degree is high, important angioneurotic nerves are easily damaged, and the probability of bone non-healing exists after surgery, but the minimally invasive surgery is a common development trend in the clinical field at present and is also a direction in which the high tibial osteotomy needs to be broken.

The invention discloses a tubular bone inner wall osteotome, which provides that the bone cutting from the inside to the outside of a bone marrow cavity can be applied to intramedullary nail fixation, pedicle extension screw fixation, external fixing frame fixation, percutaneous internal support steel plate fixation and the like after the tubular bone cutting, the bone cutting from the inside to the outside of a cancellous bone cavity can avoid exposing and drawing important nerve vessels, the problem that the bone cutting cannot be carried out due to the shielding of nerve vessels at special parts is avoided, blunt bone cutting can also realize the osteotomy under the periosteum which retains all or part of the periosteum, and a blunt distance limiting osteotome does not usually puncture the periosteum after the osteotome cuts the bone wall, and the puncture effect can be only produced without damaging the nerve vessels even if the puncture of the periosteum meets the nerve vessels, namely, the tissue trauma and the osteotomy risk can be reduced to the minimum degree by the bone cutting from the inside to the outside of the tubular bone, and the tubular bone inner wall osteotome has important significance for the orthopedic minimally invasive technology.

Disclosure of Invention

The invention aims to provide a tubular bone inner wall osteotomy device to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: a tubular endosseous osteotome, comprising:

a hollow tube member having one end disposed within the tubular bone, the hollow tube member being proximal to the open end of the tubular bone, and a connection means for assisting in securing the hollow tube member within the tubular bone, the securing means being proximal to the closed end of the tubular bone;

and arrange in eccentric post in the hollow pipe spare, slide through slider set up in osteotome in the hollow pipe spare with be located opening on the hollow pipe spare pipe wall, eccentric post is to being close during the direction displacement of osteotome, it is right the osteotome takes place to interfere, drives the osteotome to open-ended direction displacement to make the osteotome stretch out outside the hollow pipe spare, cut the bone operation to tubular bone.

Preferably, eccentric post is including keeping away from the column body section of osteotome end and being close the eccentric section of osteotome end, eccentric section is the taper structure, the osteotome middle part with the position that eccentric section corresponds is provided with the through-hole, eccentric post is to being close during the direction displacement of osteotome, in the eccentric section stretched into the through-hole, utilized the taper structure to drive the osteotome translation.

Preferably, one or more side surfaces of the eccentric section are smooth cambered surfaces.

Preferably, the column body section is an ellipse cylinder or a symmetrical polygonal column, the inner wall of the hollow pipe fitting is attached to the column body section, and the eccentric column is turned along the axial direction of the hollow pipe fitting and used for driving the osteotome to extend out or retract into the hollow pipe fitting.

Preferably, slider is including being used for supporting the osteotome base of osteotome and being located the spout at osteotome base middle part, the osteotome is arranged in the spout, the one end of spout extend to with the opening intercommunication, the osteotome receives during the power of eccentric post, along the spout translation.

Preferably, the osteotome is a prism, and the thickness of the osteotome near the opening end is less than the thickness of the osteotome far away from the opening end.

Preferably, one end of the osteotome near the opening is provided with a pattern, and the edge of the pattern is a smooth arc.

Preferably, the stabilizing device is a column, and the column is connected with the hollow pipe fitting or integrally formed and is used for extending into the tubular bone to support the hollow pipe fitting.

Preferably, the diameter of the cross section of the column is m, the diameter of the outer ring of the cross section of the hollow pipe fitting is n, and m is smaller than n.

Preferably, the hollow pipe fitting is provided with a handle at one end far away from the connecting device, and the eccentric column is provided with a knocking platform at one end outside the hollow pipe fitting.

Compared with the prior art, the invention has the following beneficial effects: the invention discloses an osteotome for the inner wall of a tubular bone, which provides that the osteotome from the inside of a marrow cavity to the outside can be applied to intramedullary nail fixation after the tubular bone is osteotomed, the osteotome from the inside of a cancellous bone cavity to the outside can avoid exposing and drawing important nerve vessels, and the condition that the osteotome cannot be carried out due to the shielding of the nerve vessels at special parts is avoided; when the intramedullary nail is applied to the femur truncation in the femur deformity correction or the tibia truncation in the tibia heightening and lengthening operation, the integrally formed column piece and the hollow pipe piece are arranged into a structure with the same shape as the intramedullary nail, and the hollow pipe piece is fixed by combining a handle; use when the pedicle of vertebral arch in the lumbar vertebrae pedicle of vertebral arch extension art cuts, use with pedicle of vertebral arch extension screw device is supporting, utilize hollow screw location among the pedicle of vertebral arch extension device to cut the bone plane and stabilize hollow tube spare, utilize the point type striking power in the twinkling of an eye when striking, strike the eccentric column, drive the osteotome and act on the inner wall of tubulose bone, cut the bone in certain point position of tubulose bone, after certain point position of tubulose bone is punctured, rotatory and carry out the osteotomy operation to the next point position of tubulose bone coplanar, until tubulose cortex of bone fracture completely. The osteotomy mode cuts bones from the cancellous bone cavity to the outside, has little damage to the outer periosteum, is equivalent to the osteotomy under the periosteum, and is very favorable for bone healing; the carving type instant point-type knocking force is labor-saving and safe, and bone fracture or surrounding tissue penetrating injury caused by sudden piercing feeling can be avoided; the osteotome is wedge-shaped blunt, even if the osteotome partially breaks the periosteum, the osteotome can only be temporarily pushed when meeting the nerve vessels without causing damage; different osteotomies correspond to different osteotome models, and the osteotomes of different models are suitable for different tube cavity diameters and cortical bone thicknesses; after the osteotome is stabilized on a position plane after entering the medullary cavity, the annular osteotomy can not be dislocated; the osteotome extending operation can be completed under the side perspective monitoring, whether the bone cortex is broken and the amount of the bone cortex can be monitored, the osteotome can cut bones in a tube cavity in a 360-degree rotating mode, the osteotome can be detected in an extending state in a rotating mode when the bone cutting is completed, and the osteotome is completed when the osteotome is not blocked for 360 degrees or the tail end of the tubular bone shakes. The osteotomy mode has extremely high safety and effectiveness, and is beneficial to use and popularization in minimally invasive osteotomy.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a cross-sectional view of a tubular endosseous osteotomy in an embodiment of the present invention;

FIG. 2 is a schematic illustration of an intramedullary nail implanted in a femur in accordance with an embodiment of the present invention;

FIG. 3 is a schematic view of the pedicle screw being placed into a pedicle of a vertebral arch in an embodiment of the invention;

FIG. 4 is a cross-sectional view taken at A-A in an embodiment of the present invention;

FIG. 5 is a sectional view taken at B-B in the embodiment of the present invention;

FIG. 6 is a schematic view of a tubular endosseum osteotomy instrument in accordance with an embodiment of the present invention in use with a screw;

in the figure: a hollow pipe fitting 1;

a connecting device 2;

an eccentric column 3, a column section 3-1, an eccentric section 3-2 and a smooth arc surface 3-3;

the bone chisel 4, the through hole 4-1 and the pattern 4-2;

an opening 5;

the bone chisel comprises a sliding device 6, an osteotome base 6-1 and a chute 6-2;

a handle 7;

knocking the platform 8;

the femur comprises a femur 9, a femur proximal end 9-1, an intramedullary nail 9-2 and a first long hole 9-3;

10 parts of lumbar vertebra, 10-1 parts of vertebral pedicle, 10-2 parts of vertebral pedicle screw and 10-3 parts of second long hole;

and a screw 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): the invention provides a tubular bone inner wall osteotome, in the osteotomy of a tubular bone, firstly, the tubular bone is cut off, then a bone connecting device (such as an intramedullary nail) is placed into an intramedullary cavity of two or more sections of the cut bone, and the cut bone is spliced, the osteotome cuts the bone inner wall by using the position of the intramedullary cavity for placing the bone connecting device in the existing operation and under the assistance of perspective equipment, in particular, as shown in figure 1, the tubular bone inner wall osteotome comprises a hollow pipe fitting 1 with one end placed in the tubular bone and a connecting device 2 for assisting the hollow pipe fitting 1 to be firmly fixed in the tubular bone, the hollow pipe fitting 1 is close to the open end of the tubular bone, and the stabilizing device 2 is close to the closed end of the tubular bone.

For example, in the deformity correction of the femur 9, as shown in fig. 2, an opening is needed from the proximal end 9-1 of the femur, and a first long hole 9-3 suitable for driving the intramedullary nail 9-2 is opened at the opening, the osteotome uses the space of the first long hole 9-3 to osteotomy from the inner wall of the femur 9, and because the inner wall of the femur 9 is not smooth and flat, the intramedullary nail 9-2 is not a straight structure, but a rod-shaped structure with a certain radian, the outer wall structure of the hollow tube 1 correspondingly placed in the first long hole 9-3 is the same as that of the intramedullary nail 9-2, so that when the hollow tube 1 is placed in the femur, the inner wall of the femur itself will have a certain fixing effect on the hollow tube 1, when the hollow tube 1 is pulled and fixed again by using the connecting device 2 also placed in the first long hole 9-3, the hollow tube 1 is stably placed in the first long hole 9-3, and then, the osteotomy device in the hollow pipe fitting 1 is utilized to perform osteotomy operation on the pedicle of vertebral arch 9-1, and when corresponding tibia and femur are subjected to osteotomy, the diameter of the outer wall of the hollow pipe fitting 1 is 6 mm-13 mm.

For example, in the process of pedicle truncation in the lumbar vertebra 10 pedicle extension operation, as shown in fig. 3, a second long hole 10-3 suitable for driving a pedicle screw 10-2 is formed in a pedicle 10-1, the osteotomy device performs osteotomy from the inner wall of the pedicle 10-1 by using the space of the second long hole 10-3, namely, the hollow pipe fitting 1 and the stabilizing device 2 are arranged in the second long hole 10-3, the osteotomy device in the hollow pipe fitting 1 is used for performing osteotomy operation on the pedicle 9-1, and when the corresponding pedicle is subjected to osteotomy, the diameter of the outer wall of the hollow pipe fitting 1 is 5 mm-7 mm.

Referring to fig. 1, a specific structure for performing osteotomy includes an eccentric column 3 disposed in a hollow tube 1, an osteotome 4 slidably disposed in the hollow tube 1 via a sliding device 6, and an opening 5 formed in a wall of the hollow tube 1, wherein when the eccentric column 3 is displaced in a direction approaching the osteotome 4, the osteotome 4 is interfered to move the osteotome 4 in a direction approaching the opening 5, and the osteotome 4 is extended out of the hollow tube 1 to perform osteotomy of a tubular bone, and when the osteotomy is performed, an instantaneous point-type striking force is used to perform point striking on an end of the eccentric column 3 away from the osteotome 4, so that the eccentric column 3 is moved in a direction approaching the osteotome 4 to displace the osteotome 4 in a direction extending out of the opening 5 at a multi-frequency and small displacement, and the osteotome 4 is made to act on an inner wall of the tubular bone to cut a certain point of the tubular bone, and then the certain point of the tubular bone is pierced, the osteotome 4 is retracted and the hollow tube 1 is rotated to perform the osteotomy at the next site of the tubular bone until the tubular bone is completely broken.

As shown in fig. 1, further, the structure for performing the osteotomy operation further comprises: the eccentric column 3 comprises a column body section 3-1 far away from the end of the osteotome 4 and an eccentric section 3-2 close to the end of the osteotome 4, the eccentric section 3-2 is of a conical structure, a through hole 4-1 is formed in the middle of the osteotome 4 and corresponds to the eccentric section 3-2, when the eccentric column 3 displaces towards the direction close to the osteotome 4, the eccentric section 3-2 extends into the through hole 4-1, the osteotome 4 is driven to translate by using the conical structure, and as the side wall of the conical structure is of an inclined plane structure, when the conical structure moves downwards, the side wall surface of the conical structure extends into the through hole 4-1, so that the osteotome 4 translates towards the direction extending out of the opening 5;

the specific way to retract the osteotome 4 is: the eccentric column 3 is drawn out of the hollow pipe fitting 1, the eccentric column 3 is turned over along the central axis of the eccentric column 3 in a mirror image mode, then the eccentric column 3 extends into the hollow pipe fitting 1, the position of the eccentric section 3-2 is changed, the eccentric column 3 is knocked towards the direction of the osteotome 4 again, and the osteotome 4 retracts under the action of the conical structure and the through hole 4-1.

As shown in FIG. 1, one or more side surfaces of the eccentric section 3-2 are further provided with smooth cambered surfaces 3-3, so that when the conical structure interferes with the through hole 4-1, the pushing action on the through hole 4-1 is smoother.

As shown in fig. 4, further, in order to prevent the eccentric cylinder 3 from rotating relatively to the hollow pipe 1 during the knocking process, the cylinder section 3-1 is configured as an elliptical cylinder or a symmetrical polygonal cylinder, and the inner wall of the hollow pipe 1 is attached to the cylinder section 3-1.

As shown in fig. 5, in order to control the movement track of the osteotome 4, a sliding device 6 is provided for making the osteotome 4 translatable, and the particular sliding device 6 includes an osteotome base 6-1 for supporting the osteotome 4 and a chute 6-2 located at the middle of the osteotome base 6-1, the osteotome 4 is disposed in the chute 6-2, one end of the chute 6-2 is extended to communicate with the opening 5, and the osteotome 4 is translated along the chute 6-2 when subjected to the force of the eccentric post 3.

Specifically, in order to prevent the osteotome 4 from escaping the slot 6-2, as shown in fig. 1, the osteotome 4 is formed in a prism shape and the thickness of the end of the osteotome 4 near the opening 5 is smaller than the thickness of the end of the osteotome 4 away from the opening 5, so that the thinner end of the osteotome 4 protrudes out of the opening 5 while ensuring that the osteotome 4 has a weight sufficient to cut the inner wall of the tubular bone.

As shown in fig. 5, a pattern 4-2 is further arranged at one end of the osteotome 4 close to the opening 5, and the edge of the pattern 4-2 is a smooth arc, so that the end of the osteotome 4, which acts on the inner wall of the tubular bone, is arranged into a blunt structure, and the osteotome 4 is prevented from being too sharp to cause bone fracture. When the device is applied to pedicle of vertebral arch osteotomy, the part of the osteotomy 4, which can extend out of the opening 5, is provided with models with the width of 2mm, 3mm, 4mm, 5mm, 6mm and the like, the extension distance is provided with models with the width of 1mm, 2mm, 3mm, 4mm and the like, the model of the extendable part is generally 3mm in width and 1mm or 2mm in extension distance when the inner side wall of the pedicle of vertebral arch close to the nerve root side is cut off, the model of the extendable part is generally 5mm in width and 3mm or 4mm in extension distance when the upper side wall of the pedicle of vertebral arch is cut off, and the model is precisely selected according to the X-ray perspective condition when the device is used specifically; when being applied to thighbone or shin bone and cutting the bone, the part of the 5 of opening can stretch out of osteotome 4 is provided with the wide model such as 6mm, 7mm, 8mm, 9mm, 10mm, and the distance that can stretch out is provided with models such as 5mm, 8mm, 10 mm.

As shown in fig. 1, specifically, the fixing device 2 is a column, the column is connected with the hollow tube 1 or integrally formed, and is used for extending into the tubular bone to support the hollow tube 1, when the fixing device is applied to the femur or tibia osteotomy, the integrally formed column and the hollow tube 1 are arranged to be of the same structure as the intramedullary nail, the column and the hollow tube 1 are placed into a hole for placing the intramedullary nail together, the column is equivalent to an extension structure of the hollow tube 1, the column is fixed by using the incomplete straight shape of the tubular bone, and the linkage has a fixing effect on the hollow tube 1.

As shown in fig. 6, further, the diameter of the cross section of the column is m, the diameter of the outer ring of the cross section of the hollow tube 1 is n, m is smaller than n, the structure is suitable for being used with a pedicle distraction device, one structure of the pedicle distraction device is a screw 11 fixed in the pedicle by bone cement, the screw 11 is a hollow structure, the hollow tube 1 is placed in front of the pedicle, the screw 11 is fixed in the pedicle, then the column is placed in the screw 11, the column is fixed by the interaction between the screw 11 and the column, and the hollow tube 1 is stabilized.

As fig. 1, further, the one end that connecting device 2 was kept away from to hollow pipe fitting 1 is provided with handle 7, and the one end that eccentric post 3 is located outside hollow pipe fitting 1 is provided with strikes platform 8, when doing the action of striking, holds handle 7 on one hand, fixes hollow pipe fitting 1 once more, and another handheld apparatus strikes and strike platform 8, gives eccentric post 3 effort.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. tubular bone inner wall osteotomy device, is characterized in that, comprises:

A hollow tube (1) with one end placed in the tubular bone and a connecting device (2) for assisting the hollow tube (1) to be stabilized in the tubular bone, the hollow tube (1) being close to the open end of the tubular bone, so The stabilization device (2) is close to the closed end of the tubular bone;

and an eccentric column (3) placed in the hollow tube (1), an osteotome (4) slidably arranged in the hollow tube (1) by a sliding device (6), and an osteotome (1) located in the hollow tube (1) The opening (5) on the pipe wall, when the eccentric column (3) is displaced in the direction close to the osteotome (4), it interferes with the osteotome (4), and drives the osteotome (4) to the opening (4). 5), and make the osteotome (4) protrude out of the hollow tube (1) to perform an osteotomy operation on the tubular bone.

2. The tubular bone inner wall osteotomy device according to claim 1, characterized in that: the eccentric column (3) comprises a column body segment (3-1) away from the end of the osteotome (4) and close to the bone The eccentric section (3-2) at the end of the chisel (4), the eccentric section (3-2) is a conical structure, and the position corresponding to the eccentric section (3-2) in the middle of the osteotome (4) is provided with A through hole (4-1), when the eccentric column (3) is displaced in a direction close to the osteotome (4), the eccentric section (3-2) extends into the through hole (4-1), using The conical structure drives the osteotome (4) to translate, turns the eccentric column (3) along the axial direction of the hollow tube (1), and drives the osteotome (4) to extend or retract the hollow tube (1) .

3. The tubular bone inner wall osteotomy device according to claim 2, characterized in that: one or more side surfaces of the eccentric section (3-2) are smooth arc surfaces (3-3).

4. The tubular bone inner wall osteotomy device according to claim 2, characterized in that: the cylinder segment (3-1) is an elliptical-like cylinder or a symmetrical polygonal cylinder, and the hollow tube (1) has a The inner wall is fitted with the cylinder section (3-1).

5. The tubular bone inner wall osteotomy device according to claim 1, characterized in that: the sliding device (6) comprises an osteotome base (6-1) for supporting the osteotome (4), and an osteotome base (6-1) located on the The chute (6-2) in the middle of the osteotome base (6-1), the osteotome (4) is placed in the chute (6-2), and one end of the chute (6-2) Extending to communicate with the opening (5), the osteotome (4) translates along the chute (6-2) when subjected to the force of the eccentric column (3).

6. The tubular bone inner wall osteotomy device according to any one of claims 1, characterized in that: the osteotome (4) is a prism, and the osteotome (4) is close to the thickness of one end of the opening (5). It is smaller than the thickness of the end of the osteotome (4) away from the opening (5).

7. The tubular bone inner wall osteotomy device according to any one of claims 6, characterized in that: one end of the osteotome (4) close to the opening (5) is provided with a pattern (4-2), and the pattern is provided with a pattern (4-2). The edges of (4-2) are smooth arcs.

8. The tubular bone inner wall osteotomy device according to any one of claims 1 to 7, characterized in that: the stabilization device (2) is a column, and the column is connected or integrally formed with the hollow pipe (1), It is used to extend into the tubular bone to support the hollow tube (1).

9. The tubular bone inner wall osteotomy device according to any one of claims 1 to 7, characterized in that: the diameter of the section of the column is m, and the diameter of the outer ring of the section of the hollow tube (1) is n, so Said m is less than n.

10. The tubular bone inner wall osteotomy device according to any one of claims 1 to 7, characterized in that: a handle (7) is provided at one end of the hollow tube (1) away from the connecting device (2), and the eccentric column is provided with a handle (7). (3) A knocking platform (8) is provided at one end outside the hollow pipe fitting (1).