CN218075129U

CN218075129U - Trephine bone extractor

Info

Publication number: CN218075129U
Application number: CN202221738342.XU
Authority: CN
Inventors: 宋晓兰; 孙永强; 杜志军; 孙雪洋
Original assignee: Luoyang Orthopedic Traumatological Hospital of Henan Orthopedic Hospital
Current assignee: Luoyang Orthopedic Traumatological Hospital of Henan Orthopedic Hospital
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2022-12-20
Anticipated expiration: 2032-07-07

Abstract

The utility model discloses a trephine bone extractor, which comprises a cylindrical trephine, a guide pin, a directional inner core and an ejector rod, wherein a needle penetrating hole is formed in the directional inner core along the length direction in a penetrating manner, the guide pin is movably sleeved in the needle penetrating hole, the end part of the front end of the guide pin, which extends out of the through hole, is fixed on a bone, and the front end of the directional inner core is abutted against the bone surface; the ring saw is movably sleeved outside the directional inner core, sawteeth are arranged at an opening at the front end of the ring saw, and a power applying part is arranged at the tail end of the ring saw; a depth limiter is fixedly arranged outside the trepan; the ejector rod is inserted into the tail of the trepan and used for ejecting the directional inner core out of the front end of the trepan. The device can play a role in stably guiding the trephine when drilling and taking bones, and avoids deviation of a drilling angle; the bone pillar is convenient to take out, the bone pillar and the trepan can be separated at one time, no bone residue is caused, time and labor are saved, and the bone pillar is kept complete; and the drilling depth can be effectively adjusted, and the practicability is stronger.

Description

Trephine bone extractor

Technical Field

The utility model belongs to the field of orthopedic surgery instruments, concretely relates to trephine bone extractor.

Background

In orthopedic surgery, the preferred treatment for early and middle stage femoral head necrosis is an autologous fibula grafting method. Before the fibula is placed, a fibula channel needs to be drilled on the outer side of the proximal end of the femur and in the neck of the femur, in order to retain the original normal bone, a trepan is generally adopted to remove the bone, and a bone remover is used for drilling and retaining the normal bone in the bone remover. The existing trephine bone taking device cannot achieve accurate and stable guiding and positioning during drilling, the drilling angle often has deviation, and the drilling deviation can seriously affect subsequent operation. Inseparable bone post remains in the trephine, and current bone taking device need be pulled out the bone post from the front end, is difficult for once only separating the bone post, wastes time and energy, can cause the damage to complete bone post.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model aims to provide a trephine bone extractor, which can play a role in stably guiding the trephine when drilling and extracting bones, and avoid the deviation of the drilling angle; the bone pillar is convenient to take out, the bone pillar and the trepan can be separated at one time, no bone residue is caused, time and labor are saved, and the bone pillar is completely reserved; and the drilling depth can be effectively adjusted, and the practicability is stronger.

In order to realize the purpose, the utility model discloses a technical scheme be:

a trephine bone extractor comprises a cylindrical trephine, a guide pin, a directional inner core and an ejector rod, wherein a needle penetrating hole penetrates through the interior of the directional inner core along the length direction, the guide pin is movably sleeved in the needle penetrating hole, the end part, extending out of the penetrating hole, of the front end of the guide pin is fixed on a bone, and the front end of the directional inner core is abutted to a bone surface; the ring saw is movably sleeved outside the directional inner core, sawteeth are arranged at an opening at the front end of the ring saw, and a power applying part is arranged at the tail end of the ring saw; a depth limiter is fixedly arranged outside the trepan; the ejector rod is inserted into the tail of the trepan and used for ejecting the directional inner core out of the front end of the trepan.

Preferably, the trephine comprises a circular bone taking cavity and a circular guide cavity inside, and the bone taking cavity at the front end is communicated with the guide cavity at the rear end; the directional inner core comprises a butt joint block and a guide rod, the front end of the guide rod is fixedly connected onto the butt joint block, the butt joint block is matched with the bone taking cavity, and the guide rod is matched with the guide cavity.

Preferably, the diameter of the bone taking cavity is larger than that of the guide cavity; the diameter of the abutting block is larger than that of the guide rod.

Preferably, the inner wall of the front end of the bone taking cavity is provided with threads.

Preferably, a plurality of through holes are formed in the side wall of the bone taking cavity in a penetrating mode.

Preferably, the front end of the abutting block is obliquely provided with an abutting surface matched with the bone surface.

Preferably, the binding surface is fixedly provided with a spine protrusion inserted into the bone surface.

Preferably, the depth limiter comprises a sleeve and a jackscrew, the sleeve is sleeved outside the trepan, and the lower end of the jackscrew vertically penetrates through the sleeve and is abutted to the trepan.

Preferably, the power application portion comprises a handle attached to the tail of the trepan.

Preferably, the power application portion comprises a tail shank mounted on the drill.

The utility model discloses the beneficial effect who has does:

1. the utility model discloses in getting the bone before drilling and putting into the bone along the drilling direction with the guide pin front end, directional inner core cover is established on the guide pin, and the front end and the bone face looks butt of directional inner core, guide pin can provide the support guide effect for the whole drilling of getting the bone object, guarantee that the trepan keeps coaxial motion with the guide pin when probing forward, and then effectively avoid appearing the problem that the deviation appears in the drilling angle.

2. After the probing is accomplished, insert the guide cavity with the ejector pin from the afterbody of trepan, through the ejector pin application of force promotion directional inner core forward, the butt joint piece by the place ahead is released whole complete bone post, accomplishes the disposable separation of bone post and trepan to through butt joint piece and the cooperation of getting the bone cavity, can make no bone matter remain in the trepan, the bone post takes out more thoroughly, the operation is simple more convenient.

3. The front end of the butt joint block is obliquely provided with a joint surface matched with the bone surface, so that the butt joint block can be tightly jointed with the bone surface.

4. The binding face is fixedly provided with a plurality of spine protrusions, after the abutting block is tightly attached to the bone face by knocking the directional inner core, the spine protrusions penetrate into the bone face, so that the directional inner core can be firmly fixed on the bone face, and the phenomenon that the directional inner core rotates to affect bone taking when the trepan rotates to take the bone is avoided.

5. For threaded connection relation between inside bone post and the trepan inner wall, when the drilling is accomplished and is outwards pulled out the trepan, the screw thread can increase the frictional force between trepan and the inside bone post, prevents that bone post and trepan from breaking away from the problem of leaving over in the drilling.

6. When the trepan rotates forwards to take the bone or the directional inner core ejects the bone pillar outwards, the perforation can balance the air pressure in the bone taking cavity, and the bone pillar drilling and the bone pillar outwards ejection are more convenient. And after the trepan is drilled, the arranged through hole is convenient for medical staff to carry out preliminary and visual observation and inspection on the bone column in the trepan.

7. When the trepan drills forwards, the depth limiter is gradually close to the skin, and when the depth limiter moves to the skin of a human body, the drilling depth can be achieved. The utility model discloses an adjust the position of depth limiter on the trepan, can carry out the accuracy to the probing degree of depth of trepan and set for, get the security of bone operation and effectively guarantee. In addition, after the trepan is drilled, the trepan can be pulled out more conveniently by knocking the depth limiter outwards.

Drawings

FIG. 1 is a state diagram of use of embodiment 1;

FIG. 2 is a schematic structural view of embodiment 1;

FIG. 3 is an internal cross-sectional view of the trepan of the present invention;

FIG. 4 is a sectional view of the inside of embodiment 2;

fig. 5 is a schematic structural view of the ring saw of embodiment 2.

Detailed Description

Example 1:

as shown in figures 1-3, the utility model provides a trepan osteotome taking device, which comprises a cylindrical trepan 5, a guide pin 3 and a directional inner core 4. The directional inner core 4 is provided with a needle penetrating hole in a penetrating way along the length direction, and the directional inner core 4 is movably sleeved on the guide pin 3 through the needle penetrating hole. Get the bone before drilling and put into bone 1 with guide pin 3 front end along drilling direction in, directional inner core 4 cover is established on guide pin 3, and directional inner core 4's front end and bone surface 10 looks butt, guide pin 3 can provide the support guide effect for the whole drilling of getting the bone ware, keeps coaxial motion with guide pin 3 when guaranteeing trepan 5 forward drilling, and then effectively avoids appearing the problem that the deviation appears in the drilling angle.

The trepan 5 is movably sleeved outside the directional inner core 4, and sawteeth 51 are arranged at an opening at the front end of the trepan 5 and used for rotary drilling. The tail end of the trepan 5 is provided with a power applying part. In this embodiment, the tail handle 532 is adopted as the power applying part, and when the bone taking tool is used, the tail handle 532 at the rear end of the trepan 5 is installed in a rotary bayonet of a drilling machine, and the trepan 5 is driven to rotate by the drilling machine, so that the bone taking tool is labor-saving and efficient.

Specifically, a circular cavity is formed inside the trepan 5, and includes a bone taking cavity 501 and a guide cavity 502 which are mutually communicated, and the diameter of the bone taking cavity 501 at the front end is larger than that of the guide cavity 502 at the rear end. The orientation core 4 comprises a front abutment block 41 and a rear guide rod 42, the end of the guide rod 42 being attached to the center of the circular abutment block 41. The abutment block 41 is fitted to the bone-taking cavity 501, and the guide rod 42 is fitted to the guide cavity 502, so that the diameter of the front abutment block 41 is larger than that of the guide rod 42. After the abutting block 41 at the front end is close to the bone surface 10, the trepan 5 is sleeved on the directional inner core 4 to drill forwards, and the diameter of the rear guide cavity 502 is smaller than that of the abutting block 41, so that the trepan 5 can only drill to the abutting block 41, and the abutting block 41 is abutted against the bone surface 10 during drilling, so that the compact degree of the bone in the bone cavity 501 can be guaranteed. After the drilling is finished, the ejector rod 7 is inserted into the guide cavity 502 from the tail part of the trepan 5, the directional inner core 4 is pushed by forward force application of the ejector rod 7, the whole complete bone column is pushed out by the abutting block 41 in front, the disposable separation of the bone column and the trepan 5 is finished, and no bone residue exists in the trepan 5 through the cooperation of the abutting block 41 and the bone taking cavity 501, the bone column is taken out more thoroughly, and the operation is simpler and more convenient.

In particular, since the outer femoral bone surface 10 has a certain included angle, in the embodiment, the engaging surface 410 engaging with the bone surface 10 is obliquely disposed at the front end of the abutting block 41, so that the abutting block 41 can be more closely engaged with the bone surface 10.

In addition, a plurality of spine protrusions 411 are fixedly arranged on the adhering surface 410, after the abutting block 41 can be tightly adhered to the bone surface 10 by knocking the directional inner core 4, the spine protrusions 411 can be pricked into the bone surface 10, so that the directional inner core 4 can be firmly fixed on the bone surface 10, and the influence on bone taking caused by the rotation of the directional inner core 4 when the trepan 5 rotates to take the bone is avoided.

Get the front end inner wall of bone cavity 501 and be equipped with the screw thread, when trepan 5 front end drills forward and gets the bone, be threaded connection relation between inside bone post and the trepan 5 inner wall, when the drilling is accomplished and is outwards pulled out trepan 5, the screw thread can increase the frictional force between trepan 5 and the inside bone post, prevents to appear bone post and trepan 5 and breaks away from the problem of leaving over in the drilling.

The sidewall of the bone-taking cavity 501 is perforated with a plurality of through holes 52. When the trepan 5 rotates forwards to take a bone or the directional inner core 4 ejects the bone pillar outwards, the through hole 52 can balance the air pressure in the bone taking cavity 501, so that the bone pillar can be conveniently drilled and ejected outwards. And after the trepan 5 is drilled, the perforations 52 are provided to facilitate initial visual observation and inspection of the bone fragments in the trepan 5 by medical personnel.

The depth stop 6 of 5 outside settings on trepan includes sleeve pipe 61 and jackscrew 62, and sleeve pipe 61 movable sleeve establishes outside trepan 5, and jackscrew 62 threaded sleeve establishes in sleeve pipe 61 outside, and the lower extreme of jackscrew 62 runs through sleeve pipe 61 perpendicularly and with trepan 5 looks butt, changes sleeve pipe 61 cover outside trepan 5 and establishes the position to it is fixed to lock through jackscrew 62, and then can effectively adjust the fixed position of depth stop 6 on trepan 5.

The trepan bone taking is a minimally invasive operation, when the trepan bone taking device is used, the depth limiter 6 on the trepan 5 is located outside a human body, the front end of the trepan 5 extends into a human body subcutaneous contact bone surface 10, and the distance between the depth limiter 6 and the human body skin 2 is the distance for the trepan 5 to drill forwards. When the trepan 5 drills forwards, the depth stop 6 gradually approaches the skin 2, and when the depth stop 6 moves to the position of the skin 2 of the human body, the drilling depth can be reached. The utility model discloses an adjust the position of depth stop 6 on trepan 5, can carry out the accuracy to the probing degree of depth of trepan 5 and set for, get the security of bone operation and effectively guarantee. In addition, after the trepan 5 is drilled, the trepan 5 can be pulled out more conveniently by knocking the depth stop 6 outwards.

When the utility model is used, firstly, the front end of the guide pin 3 is implanted into the bone 1, the directional inner core 4 is sleeved on the guide pin 3, the inclined binding surface 410 of the butt block 41 is bound with the bone surface 10, and the spine protrusion 411 is pricked into the bone surface 10 to firmly fix the directional inner core 4; then the trepan 5 is sleeved outside the directional inner core 4, the saw teeth 51 at the front end of the trepan 5 are contacted with the bone surface 10, the distance between the depth limiter 6 and the human skin 2 is adjusted at the moment, the trepan 5 is drilled by pushing a drilling machine, and the trepan 5 keeps coaxial motion with the guide pin 3 when drilling forwards. When the depth stop 6 moves to the position of the human skin 2, namely the bone taking depth is reached, the depth stop 6 is knocked to take the circular saw out. Then insert the guide cavity 502 with ejector pin 7 from the afterbody of trepan 5, push out whole complete bone post through directional inner core 4, accomplish the disposable separation of bone post and trepan 5 to no bone remains in the trepan 5 when getting the bone, the bone post takes out more thoroughly, and the operation is simple more convenient.

Example 2:

as shown in fig. 4-5, the difference from embodiment 1 is that in this embodiment, the power applying portion is a handle 531 vertically fixed to the tail of the trepan 5, and the trepan 5 can drill forward to extract bone by pressing the trepan 5 forward and rotating the handle 531, which is more convenient to use.

Example 3:

as shown in fig. 3, the difference from the above embodiments is that the diameter of the outer wall of the trepan 5 in the present embodiment is large at the front end and small at the rear end, and the trepan is matched with the bone taking cavity 501 and the guide cavity 502 inside the trepan. The inner wall of the sleeve of the depth limiter 6 is provided with a large sleeve cavity 601 and a small sleeve cavity 602 which are radially matched with the outer diameter of the trepan 5, and when the sleeve 61 moves to the diameter-variable position of the outer wall of the trepan 5, the minimum bone-taking depth of the trepan 5 is obtained.

Claims

1. The utility model provides a trephine bone extractor, includes the trepan of cylinder type, its characterized in that: the bone fracture plate is characterized by further comprising a guide pin, a directional inner core and an ejector rod, wherein a needle penetrating hole is formed in the directional inner core in a penetrating mode along the length direction, the guide pin is movably sleeved in the needle penetrating hole, the end portion, extending out of the through hole, of the front end of the guide pin is fixed on a bone, and the front end of the directional inner core is abutted to the bone surface; the ring saw is movably sleeved outside the directional inner core, sawteeth are arranged at an opening at the front end of the ring saw, and a power applying part is arranged at the tail end of the ring saw; a depth limiter is fixedly arranged outside the trepan; the ejector rod is inserted into the tail of the trepan and used for ejecting the directional inner core out of the front end of the trepan.

2. The trephine bone harvester of claim 1, wherein: the trepan internally comprises a circular bone taking cavity and a guide cavity, and the bone taking cavity at the front end is communicated with the guide cavity at the rear end; the directional inner core comprises a butt joint block and a guide rod, the front end of the guide rod is fixedly connected to the butt joint block, the butt joint block is matched with the bone taking cavity, and the guide rod is matched with the guide cavity.

3. The trephine bone harvester of claim 2, wherein: the diameter of the bone taking cavity is larger than that of the guide cavity; the diameter of the abutting block is larger than that of the guide rod.

4. The trephine bone harvester of claim 2, wherein: the inner wall of the front end of the bone taking cavity is provided with threads.

5. The trephine bone harvester of claim 2, wherein: the side wall of the bone taking cavity is provided with a plurality of through holes in a penetrating mode.

6. The trephine bone harvester of claim 2, wherein: the front end of the abutting block is obliquely provided with a binding surface matched with the bone surface.

7. The trephine bone harvester of claim 6, wherein: the binding surface is fixedly provided with a spine bulge which is inserted into the bone surface.

8. The trephine bone harvester of claim 1, wherein: the depth limiter comprises a sleeve and a jackscrew, the sleeve is sleeved outside the trepan, and the lower end of the jackscrew vertically penetrates through the sleeve and is abutted against the trepan.

9. A trephine bone harvester according to any one of claims 1 to 8, wherein: the power applying part comprises a handle fixedly connected to the tail part of the trepan.

10. A trephine bone harvester according to any one of claims 1 to 8, wherein: the power application portion includes a tail shank mounted on the drill.