CN106821485B

CN106821485B - Bone grafting device

Info

Publication number: CN106821485B
Application number: CN201710205973.2A
Authority: CN
Inventors: 张雁儒; 余进伟; 宋合新
Original assignee: Henan University of Technology
Current assignee: Henan University of Technology
Priority date: 2017-03-31
Filing date: 2017-03-31
Publication date: 2023-05-26
Anticipated expiration: 2037-03-31
Also published as: CN106821485A

Abstract

The utility model discloses a bone grafting device used in bone grafting operation, which comprises a conveying pipe, wherein a filler opening communicated with an inner cavity of the conveying pipe is arranged on the peripheral wall of the conveying pipe close to the tail end, and a pushing mechanism is detachably arranged on the conveying pipe through a connecting piece. In the bone grafting device provided by the utility model, the pushing mechanism and the conveying pipe are detachably arranged, and when the bone grafting cavity is washed, the pushing mechanism is not arranged on the conveying pipe, and the conveying pipe and the filling port are used as washing devices. When the bone grafting cavity is filled, the pushing mechanism is installed on the conveying pipe, then the filler is filled into the filler opening on the conveying pipe, and then the filler is pushed into the bone grafting cavity by the pushing mechanism, so that the bone grafting cavity is filled. The bone grafting device has a simple structure, realizes two purposes of one device, ensures that the operation of bone grafting operation is simple, further reduces the difficulty of bone grafting operation, reduces the number of devices used in the bone grafting operation, and reduces the cost of the bone grafting operation.

Description

Bone grafting device

Technical Field

The utility model belongs to the field of medical appliances, in particular to an orthopedic instrument used when bone grafting fillers are needed to be implanted, and particularly relates to a bone grafting device.

Background

In the field of orthopaedics, bone grafting is performed mainly by transplanting a filler such as bone tissue or biomaterial to a site where bone defect or bone reinforcement or guide fusion is performed in a patient, and in this procedure, bone tissue or biomaterial needs to be transplanted by means of a bone grafting device.

The bone grafting device in the prior art mostly adopts a bone grafting device as described in the patent document of the utility model with the application number of 201220176508.3 and the application date of 2012.04.24, and the patent name of a bone grafting device, and the bone grafting device comprises a hollow tubular bone grafting device body, wherein a piston is arranged in the bone grafting device body, a piston rod for pushing the piston to move along the axis direction of the bone grafting device body is arranged on the piston, and a handle is arranged at the tail end of the bone grafting device body.

When the bone grafting device in the prior art is used, the prepared filler is placed in the bone grafting device body, the piston is installed in the bone grafting device body, the front end of the bone grafting device body is aligned with a bone grafting cavity where bone grafting is needed, the piston is pushed by the piston rod to move, and the filler is pushed into the bone grafting cavity by the piston to complete bone grafting.

In the bone grafting operation process, before bone grafting is carried out on the bone grafting cavity, the bone grafting cavity is also required to be washed, and bone tissues with residual lesions are washed out of the bone grafting cavity, so that the newly implanted filler is ensured not to be infected by the bone tissues with lesions. In the prior art, a special flushing device is generally adopted to flush the bone grafting cavity, and then the bone grafting device is adopted to implant the bone grafting cavity.

Therefore, the bone grafting cavity is firstly flushed through the flushing device and then replaced by the bone grafting device to fill the bone grafting cavity, and the replacement of the device in the bone grafting operation not only makes the operation of the bone grafting operation complicated, but also increases the difficulty of the bone grafting operation and the cost of the bone grafting operation.

Disclosure of Invention

The utility model mainly solves the technical problem of providing the bone grafting device which can not only flush the bone grafting cavity but also fill the bone grafting cavity, so that the operation of bone grafting operation is simple, the operation efficiency is improved, and the difficulty of the bone grafting operation and the cost of the bone grafting operation can be reduced.

In order to solve the technical problems, the bone grafting device adopts the following technical scheme: the bone grafting filling device comprises a conveying pipe for conveying bone grafting filling materials, wherein a filling port which is communicated with an inner cavity of the conveying pipe and used for filling the bone grafting filling materials is formed in the peripheral wall, close to the tail end, of the conveying pipe, and a pushing mechanism for pushing the bone grafting filling materials is detachably arranged on the conveying pipe through a connecting piece.

Further preferably, the pushing mechanism includes a push rod disposed inside the conveying pipe and movably assembled with the conveying pipe, a piston is fixedly disposed at a front end of the push rod, and a limiting point of the piston at a distal end of the conveying pipe is located at a rear side of the filling port.

Further preferably, the connecting member includes a rod lock slidably mounted on the push rod, and the rod lock is snap-fitted to the opening at the distal end of the delivery tube by a snap-fit structure.

Still preferably, the above-mentioned fastening structure includes a sleeve hole axially provided at the front end of the above-mentioned lever lock, the sleeve hole is fitted coaxially with the outer peripheral surface of the end of the above-mentioned conveying pipe, an L-shaped locking groove is axially extended from the front end surface of the wall of the sleeve hole to the rear, and a fastening post is provided on the outer peripheral wall of the conveying pipe, which is fitted with the L-shaped locking groove.

Further preferably, the front end of the delivery pipe is provided with a blocking mechanism which contracts inward and expands outward around the center of the front end surface of the delivery pipe.

Further preferably, the conveying pipe is composed of an inner pipe and an outer pipe which are coaxially and hermetically sleeved, the inner pipe and the outer pipe are rotatably assembled, the rod lock is assembled on the inner pipe, the blocking mechanism comprises blocking pieces which are uniformly distributed and hinged on the front end face of the inner pipe along the circumferential direction of the inner pipe, and the middle part of each blocking piece is movably hinged on the front end face of the outer pipe.

Further preferably, the inner tube is a telescoping tube.

Further preferably, the filler port is in a horn shape with a large upper part and a small lower part.

Further preferably, the axis of the filler port intersects the axis of the delivery tube and the angle from the axis of the delivery tube clockwise to the axis of the filler port is acute.

The bone grafting device has the beneficial effects that: the bone grafting device provided by the utility model has the advantages that the pushing mechanism and the conveying pipe of the bone grafting device are detachably arranged, when the bone grafting device is utilized to flush a bone grafting cavity, the pushing mechanism is firstly not arranged on the conveying pipe, the conveying pipe and the filling opening on the conveying pipe are directly utilized as flushing devices, the conveying pipe is stretched into the bone grafting cavity, the tail end opening of the conveying pipe is narrowed or blocked, flushing fluid is injected into the filling opening, and then the tail end opening of the conveying pipe is opened, so that the flushing fluid flows out from the tail end opening of the conveying pipe along the conveying pipe, and flushing is completed. When the bone grafting device is used for filling the bone grafting cavity, the conveying pipe is not required to be taken out and replaced, the pushing mechanism is directly arranged on the conveying pipe, the installation is simple and convenient, then the filler is filled into the filler opening on the conveying pipe, and the pushing mechanism pushes the filler into the bone grafting cavity to complete the filling of the bone grafting cavity. The bone grafting device has a simple structure, does not need to replace devices when washing and filling the bone grafting cavity, and can directly form the bone grafting device for grafting bone to the bone grafting cavity by installing a pushing mechanism on a conveying pipe for washing the bone grafting cavity, so that the bone grafting device can wash the bone grafting cavity and fill the bone grafting cavity, realize two purposes of one device, simplify the operation of bone grafting operation, reduce the difficulty of the bone grafting operation and greatly improve the operation efficiency. The number of the devices used in the bone grafting operation is reduced, and the cost of the bone grafting operation is reduced.

Meanwhile, the bone grafting device provided by the utility model can measure the volume of the bone grafting cavity when the bone grafting cavity is washed, so that the volume of filler to be added into the bone grafting cavity can be accurately grasped, and the condition that the bone grafting cavity is not filled or the filler is wasted due to excessive filling is avoided.

Further, the pushing mechanism comprises a piston and push rod combination, the piston and the push rod are positioned in the conveying pipe, the overall outer diameter size of the bone grafting device is reduced, and the pushing mechanism is simple in structure and convenient to operate.

Further, the pushing mechanism is assembled on the conveying pipe by utilizing the rod lock, the rod lock plays a role in supporting and guiding the push rod of the pushing mechanism, and the rod lock is simple and quick to install. The pushing mechanism and the conveying pipe form an integral structure, and the pushing rod is ensured to move stably and cannot fall off in the pushing process of the pushing rod.

Further, the sealing mechanism is preferably arranged, and when the bone grafting device is used for flushing the bone grafting cavity, the sealing mechanism is blocked on the inner wall of the bone grafting cavity, and can firstly play a role of supporting and limiting the bone grafting device to prevent the bone grafting device from moving. Simultaneously, the gap between the conveying pipe and the bone grafting channel for placing the conveying pipe can be blocked, so that flushing liquid is prevented from flowing out along the gap when flushing is performed.

Further, the inner tube is preferably provided as a telescopic tube, which can be adapted for flushing and filling bone grafting cavities of different depths. The bone grafting device has wider application range.

Drawings

FIG. 1 is a front view of an embodiment of the bone graft device of the present utility model;

FIG. 2 is an exploded view of the embodiment of the bone graft device of FIG. 1;

FIG. 3 is a view of the blocking mechanism in a retracted state in the embodiment of the bone graft device of FIG. 1;

FIG. 4 is an expanded state view of the blocking mechanism in the embodiment of the bone graft device of FIG. 1;

FIG. 5 is a view showing the use of the embodiment of the bone graft device of FIG. 1 for irrigating a bone graft cavity;

FIG. 6 is a view of the bone graft cavity filled with the embodiment of the bone graft device of FIG. 1;

fig. 7 is a schematic view of the structure of an inner tube in the embodiment of the bone graft device of fig. 1.

Detailed Description

In the description of the specific embodiments of the present utility model, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in 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 configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" means two or more. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, unless otherwise specifically defined and limited. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present utility model are shown in the drawings. This utility model 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.

As shown in fig. 1 to 6, an embodiment of the bone grafting apparatus of the present utility model includes: the conveying pipe 1, the peripheral wall that conveying pipe 1 is close to the terminal is provided with the filler mouth 3 with the inner chamber intercommunication of conveying pipe 1, is provided with pushing equipment 5 on the conveying pipe 1 through a connecting piece 4 detachably.

As shown in fig. 5, in the bone grafting device according to the embodiment of the present utility model, the pushing mechanism 5 and the delivery tube 1 are detachably disposed, when the bone grafting cavity 22 on the bone 2 is to be washed, the pushing mechanism 5 is not mounted on the delivery tube 1, the delivery tube 1 and the filler port 3 on the delivery tube 1 are directly utilized as a washing device, the delivery tube 1 is firstly inserted into the bone 2 from the bone grafting channel 21, the front end opening of the delivery tube 1 is located at the inner edge of the bone grafting cavity 22, then the end opening of the delivery tube 1 is plugged, and then the washing liquid is injected into the filler port 3, and enters the bone grafting cavity 22 along the delivery tube 1 to be washed, and then the end opening of the delivery tube 1 is opened, so that the washing liquid flows out from the end opening of the delivery tube 1, and the above operations can be repeated to complete the washing of the bone grafting cavity 22.

As shown in fig. 6, when the bone grafting cavity 22 is to be filled, the conveying pipe 1 is not required to be taken out, detached and replaced, the pushing mechanism 5 is directly arranged on the conveying pipe 1 through the connecting piece 4, the filler 23 is filled into the filler opening 3, the filler 23 filled into the conveying pipe 1 is pushed into the bone grafting cavity 22 by the pushing mechanism 5, and the above operation process is repeated until the bone grafting cavity 22 is filled. Filling of the bone graft cavity 22 is completed.

The size of the space in the bone graft cavity 22 may be measured while the bone graft cavity 22 is being irrigated, prior to filling the bone graft cavity 22. The measuring method comprises the following steps: after the flushing or after the flushing is completed, the flushing liquid is injected again, so that the flushing liquid fills the bone grafting cavity 22 and the conveying pipe 1, the total volume of the filled flushing liquid is measured, the injected flushing liquid can be measured by a method of measuring while injecting, and the volume of the discharged flushing liquid can be measured by a method of discharging the flushing liquid after filling. Then, the volume of the inner cavity of the conveying pipe 1 is subtracted from the measured total volume of the flushing liquid to obtain the volume of the bone grafting cavity 22, so that the volume of the filler 23 required to be added into the bone grafting cavity 22 can be accurately grasped, and the situation that the bone grafting cavity 22 is not filled or is excessively filled due to the fact that the volume of the filler 23 is not accurately measured is avoided. Insufficient bone grafting can be caused when the bone is not filled, the treatment period is prolonged, and the bone collapses and other risks. Overfilling can result in increased intra-cavity pressure in the bone graft, which is detrimental to the bonding of filler 23 to the bone tissue within the cavity, and the growth of new bone tissue. Of course, also causes wastage of the filler 23.

According to the embodiment of the bone grafting device, when two steps of flushing and filling are carried out on the bone grafting cavity, the device is not required to be replaced, but a pushing mechanism is directly arranged on the conveying pipe for flushing the bone grafting cavity, so that the bone grafting device for grafting bone on the bone grafting cavity can be formed, the bone grafting device can flush the bone grafting cavity and fill the bone grafting cavity, two purposes of one device are realized, a flushing set for flushing the bone grafting cavity 22 is not required to be additionally increased in the prior art, replacement time is saved, and operation efficiency is improved. Meanwhile, the number of the devices used in the bone grafting operation is reduced, and the cost of the bone grafting operation is reduced. In addition, the embodiment of the bone grafting device can accurately measure the volume of the bone grafting cavity 22, and improves the accuracy of bone grafting.

Further preferably, the filler port 3 is in a horn shape with a large upper part and a small lower part. The axis of the filler port 3 intersects with the axis of the delivery pipe 1, and the included angle alpha between the axis of the delivery pipe and the axis of the filler port is an acute angle. This arrangement makes it easier to move the irrigation fluid or bone grafting filler filled into the filler port 3 along the delivery tube 1 toward the distal end of the delivery tube 1.

Further preferably, as shown in fig. 2, the pushing mechanism 5 includes a pushing rod 6 disposed inside the conveying pipe 1 and moving along the axis of the conveying pipe 1, a piston 7 having an outer diameter equal to the inner diameter of the conveying pipe 1 is fixedly disposed at the front end of the pushing rod 6, and the piston 7 is located at the rear side of the filler port 3 at the limit point of the end of the conveying pipe 1 so that the piston 7 can push the filler 23 to move forward along the conveying pipe 1 when the filler port 3 is filled with the filler 23. The tail end of the push rod 6 is fixedly provided with a push handle 9. The pushing mechanism 5 adopts an assembly structure of the push rod 6 and the piston 7, so that the pushing mechanism 5 can be operated at the tail end of the conveying pipe 1, and the operation is simple and convenient.

It is further preferred that the connecting member 4 includes a rod lock 8 slidably fitted on the push rod 6, and that the rod lock 8 is snap-fitted at the opening of the distal end of the delivery tube 1 by a snap-fit structure.

Further preferably, the clamping structure comprises a sleeve hole 10 axially arranged at the front end of the rod lock 8, the sleeve hole 10 is coaxially sleeved with the outer peripheral surface of the tail end of the conveying pipe 1, an L-shaped locking groove 11 axially extending is formed on the hole wall of the sleeve hole 10 from the front end surface of the hole wall to the rear, and a clamping column 12 in clamping fit with the L-shaped locking groove 11 is arranged on the outer peripheral wall of the conveying pipe 1. When the pushing mechanism 5 is installed on the conveying pipe 1, the piston 7 and the push rod 6 are inserted into the conveying pipe 1, then the rod lock 8 is sleeved on the outer peripheral surface of the conveying pipe 1 through the sleeve hole 10, in the sleeving process, the clamping column 12 is firstly inserted from an axial groove part in the L-shaped locking groove 11, then the rod lock 8 is rotated, the clamping column 12 enters into a circumferential groove part in the L-shaped locking groove 11, and the push rod 6 and the conveying pipe 1 can be axially limited and locked through the rod lock 8. The rod lock 8 is coaxially sleeved on the conveying pipe 1, and plays a role in supporting and guiding the pushing rod 6 in the axial pushing process, so that the pushing rod 6 can accurately and stably push the filler 23 into the bone grafting cavity 22. The rod lock 8 enables the pushing mechanism 5 and the conveying pipe 1 to be of an integral structure, and ensures that the pushing mechanism 5 moves stably and cannot fall off in the use process.

As shown in fig. 2, it is further preferable that the front end of the delivery tube 1 is provided with a blocking mechanism 13 which is contractible inward and expandable outward centering on the center of the front end face of the delivery tube 1. When the delivery tube 1 and the filler port 3 are used as a flushing device for flushing the bone grafting cavity 22, a gap exists between the outer peripheral surface of the delivery tube 1 and the inner wall of the bone grafting channel 21, flushing fluid possibly flows out of the gap in the flushing process, artificial wiping is needed, some trouble is caused to the bone grafting operation, and bone tissues possibly flow into a wound of a patient along with the flushing fluid, so that the later recovery of the patient is affected to a certain extent. The blocking mechanism 13 of this embodiment expands outwards when the conveying pipe 1 is inserted into the edge inside of the bone grafting cavity 22, so that the blocking mechanism 13 is blocked on the inner wall of the bone grafting cavity 22, firstly the blocking mechanism 13 can play a role in supporting and limiting the conveying pipe 1, preventing the conveying pipe 1 from moving and falling along the bone grafting channel 21, secondly the blocking mechanism 13 can also block the gap between the conveying pipe 1 and the bone grafting channel 21 when expanding outwards, and the flushing liquid and bone tissue are prevented from flowing out along the gap when the bone grafting cavity 22 is flushed.

As shown in fig. 2 to 4, further preferably, the conveying pipe 1 is composed of an inner pipe 14 and an outer pipe 15 coaxially and hermetically sleeved, the inner pipe 14 and the outer pipe 15 rotate relatively, the rod lock 8 is assembled on the inner pipe 14, the blocking mechanism comprises blocking pieces 16 which are uniformly and hingedly arranged on the front end surface of the inner pipe 14 along the circumferential direction, and the middle part of each blocking piece 16 is movably hinged on the front end surface of the outer pipe 15. When the delivery tube 1 is initially inserted into the bone grafting channel 21, as shown in fig. 3, the baffle 16 is in an inwardly contracted position, the baffle 16 encloses an outer diameter smaller than the outer diameter of the outer tube 15, and when the front port of the delivery tube 1 is inserted into the position inside the edge of the bone grafting cavity 22, the inner tube 14 is rotated to expand the baffle 16 outwardly and stop against the inner wall of the bone grafting cavity 22.

As shown in fig. 7, further preferably, the inner tube 14 is a telescopic tube, the telescopic function of the telescopic tube can be achieved by the following structure that the inner tube 14 comprises a first inner tube 141 and a second inner tube 142 coaxially sleeved, a clamping structure is arranged at the joint of the first inner tube 141 and the second inner tube 142, when the length of the inner tube 14 needs to be adjusted, the first inner tube 141 only needs to be extended or retracted relative to the second inner tube 142, and then the joint of the first inner tube 141 and the second inner tube 142 is clamped by adopting the clamping structure. The inner tube 14 with telescoping function can be adapted to fill bone graft cavities of different depths. The embodiment of the bone grafting device has wider application range.

The clamping structure comprises a connecting sleeve 143 fixedly sleeved on the second inner pipe 142 and a movable sleeve 144 movably sleeved on the first inner pipe 141, elastic claws 145 uniformly distributed on the outer peripheral surface of the first inner pipe 141 are fixedly arranged on the connecting sleeve 143, a conical cavity for accommodating the elastic claws 145 is arranged in the movable sleeve 144, external threads are arranged on the connecting sleeve 143, and internal threads matched with the external threads are arranged on the inner wall of the movable sleeve 144. For example, when the length of the inner tube 14 is lengthened, the first inner tube 141 is stretched, after the length is determined, the movable sleeve 144 is screwed onto the connecting sleeve 143, and at this time, the elastic claw 145 gradually contracts under the action of the tapered cavity of the movable sleeve 144 until tightly clamped on the outer peripheral surface of the first inner tube 141, i.e., the first inner tube 141 and the second inner tube 142 are locked.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the present utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present utility model.

Claims

1. The utility model provides an osteosynthesis ware, includes the conveyer pipe that is used for carrying the bone grafting filler, its characterized in that, be provided with on the peripheral wall that the conveyer pipe is close to the terminal with the inner chamber intercommunication of conveyer pipe is used for adding the filler mouth of bone grafting filler, be provided with on the conveyer pipe through a connecting piece detachably and push away the pushing equipment of bone grafting filler, pushing equipment is including setting up inside the conveyer pipe and with the conveyer pipe removes the push rod of assembly, the front end of push rod is fixed to be provided with the piston, the piston is in the terminal limit point of conveyer pipe is located the rear side of filler mouth, the connecting piece is including sliding assembly in pole lock on the push rod, just the pole lock passes through joint structure joint and is in the terminal opening part of conveyer pipe, the front end of conveyer pipe is provided with the center of the preceding terminal face of conveyer pipe and inwards contracts and outwards expands and block the mechanism, the conveyer pipe comprises inner tube and outer tube that coaxial, inner tube and inner tube rotate the assembly, the pole lock is in the terminal limit point of conveyer pipe is located the terminal surface of baffle is in the terminal surface on the outer tube is followed to the articulated on the terminal surface of baffle.

2. The bone grafting device according to claim 1, wherein the clamping structure comprises a sleeve hole axially arranged at the front end of the rod lock, the sleeve hole is coaxially sleeved and matched with the outer peripheral surface of the tail end of the conveying pipe, an L-shaped locking groove is axially arranged on the hole wall of the sleeve hole from the front end surface of the hole wall to the rear direction, and a clamping column in clamping and matched with the L-shaped locking groove is arranged on the outer peripheral wall of the conveying pipe.

3. The bone grafting apparatus of claim 2, wherein the inner tube is a telescoping tube.

4. The bone grafting apparatus according to claim 3, wherein the filler port is horn-shaped with a large upper portion and a small lower portion.

5. The bone grafting instrument of claim 4, wherein the axis of the filler port intersects the axis of the delivery tube and an angle from the axis of the delivery tube clockwise to the axis of the filler port is acute.