CN212438800U - Bone cement apparatus assembly - Google Patents
Bone cement apparatus assembly Download PDFInfo
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- CN212438800U CN212438800U CN202020334871.8U CN202020334871U CN212438800U CN 212438800 U CN212438800 U CN 212438800U CN 202020334871 U CN202020334871 U CN 202020334871U CN 212438800 U CN212438800 U CN 212438800U
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- bone cement
- sleeve
- pedicle screw
- tube
- plug
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Abstract
The utility model discloses a bone cement apparatus assembly, which belongs to the technical field of medical apparatus, the bone cement apparatus assembly comprises a sleeve, a propeller arranged inside the sleeve and a sleeve locker arranged outside the sleeve, the lower end of the sleeve is provided with a hollow plug, the plug comprises a guide part for inserting bone cement holes on the pedicle screw body, a conical part for plugging the bone cement holes on the pedicle screw body, a transverse rod part horizontally arranged in a U-shaped groove of the pedicle screw and a connecting part connected with the lower end of the sleeve from bottom to top in sequence; the material of the plug is a high polymer material; the inner side of the upper part of the limiting pipe is provided with an elastic friction piece. The utility model discloses simple structure, convenient operation, it is more firm when contacting with pedicle of vertebral arch screw, the leakproofness is good, effectively solves the bone cement injection problem of doing the backbone internal fixation operation to the osteoporosis patient to and effectively reduce or reduce the harm of bone cement seepage.
Description
Technical Field
The utility model relates to the technical field of medical equipment, in particular to a bone cement instrument component.
Background
Percutaneous Vertebroplasty (PVP), which refers to percutaneous injection of bone cement into a vertebral body through the pedicle of a vertebral arch or outside the pedicle of a vertebral arch to increase the strength and stability of the vertebral body, prevent collapse, and relieve pain; a minimally invasive spinal surgery technique for the purpose of restoring or partially restoring vertebral body height. Percutaneous vertebroplasty is mainly applied to the treatment of mild vertebral compression fracture or some vertebral body tumors. Vertebral compression fracture is the most common complication of osteoporosis patients, can cause local pain and movement disorder, and can also cause paralysis of lower limbs seriously.
The bone cement apparatus is one of the necessary apparatuses in percutaneous vertebroplasty, mainly used for injecting bone cement into the damaged and damaged centrum. When an operation is carried out on the existing spinal bone cement instrument, the tightness of a place contacted with a pedicle screw is poor, bone cement leakage occurs, the leaked bone cement can cause local infection of a patient, if the bone cement leaks into a vertebral canal, the vertebral canal can be narrowed, and therefore diseases of a series of nerve dysfunction such as pain, numbness, limb weakness, lameness, defecation disorder and the like are caused.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a bone cement apparatus subassembly that leakproofness is good when contacting with pedicle of vertebral arch screw.
In order to solve the technical problem, the utility model provides a technical scheme as follows:
a bone cement apparatus assembly comprising a cannula, a pusher mounted inside the cannula, and a cannula lock mounted outside the cannula, the cannula lock comprising a restraining tube, the lower portion of which is provided with a connection structure for connecting a U-shaped slot of a pedicle screw, wherein:
the lower end of the sleeve is provided with a hollow plug, and the plug sequentially comprises a guide part for inserting a bone cement hole on the pedicle screw body, a conical part for plugging the bone cement hole on the pedicle screw body, a transverse rod part horizontally arranged in a U-shaped groove of the pedicle screw and a connecting part for connecting with the lower end of the sleeve from bottom to top;
a jack is arranged in the connecting part, the diameter of the jack is equal to the outer diameter of the tube body of the sleeve, and the lower end of the tube body of the sleeve is inserted in the jack;
the plug is made of a high polymer material;
and an elastic friction piece is arranged on the inner side of the upper part of the limiting pipe.
Further, the taper of the taper part is 7-15 degrees.
Further, the height of the guide part is 1-5mm, the height of the conical part is 3-6mm, and the depth of the insertion hole in the connecting part is 5-20 mm.
Furthermore, the connecting structure on the limiting pipe is an external thread arranged at the lower part of the limiting pipe, and the external thread is matched with an internal thread of a U-shaped groove of the pedicle screw.
Further, the height between the upper edge of the connecting part and the lower edge of the cross rod part is designed to enable the lower edge of the limiting pipe to abut against the upper surface of the connecting part after the lower part of the limiting pipe is connected with the U-shaped groove of the pedicle screw in place.
Furthermore, the limiting tube is provided with a laser marking line for indicating the matching depth of different types of pedicle screws, and/or a push rod of the propeller is provided with a mark marking line for indicating the pushing amount of bone cement in the sleeve.
Furthermore, the elastic friction piece is a marble, a spring plate or a ball plunger with a spring.
Further, the sleeve locking device further comprises a knob arranged at the upper end of the limiting pipe, and a vertical anti-skidding structure is arranged on the outer surface of the knob.
Furthermore, the side of spacing pipe is provided with logical groove, the width more than or equal to that leads to the groove the external diameter of sheathed tube body.
Further, the sleeve pipe includes the body and is located the body handle of body top, the propeller includes the push rod and is located the push rod handle of push rod top, the top middle part of body handle is provided with the screw thread post, the lower part of push rod handle be provided with screw thread post matched with internal thread groove.
The utility model discloses following beneficial effect has:
the utility model discloses a bone cement apparatus subassembly, simple structure, convenient operation, it is more firm when contacting with pedicle of vertebral arch screw, the leakproofness is good, effectively solves the bone cement injection problem of doing the backbone internal fixation operation to the osteoporosis patient to and effectively reduce or reduce the harm of bone cement seepage.
Drawings
Fig. 1 is a schematic view of the overall structure of the bone cement appliance assembly of the present invention, wherein (a) is a front view and (b) is a side view;
FIG. 2 is a schematic illustration of the instrument assembly of FIG. 1 with the cannula lock removed, wherein (a) is a front view and (b) is a side view;
FIG. 3 is a schematic illustration of the instrument assembly of FIG. 2 with the pusher removed, wherein (a) is an elevation view and (b) is a side view;
FIG. 4 is a schematic structural view of a pusher in the instrument assembly of FIG. 1, wherein (a) is an elevation view and (b) is a side view;
FIG. 5 is a schematic structural view of a cannula lock in the instrument assembly of FIG. 1, wherein (a) is a front view, (b) is a side view, and (c) is a top view;
FIG. 6 is a schematic view of the stopper of the instrument assembly of FIG. 1, wherein (a) is a front view, (b) is a side view, and (c) is a bottom view;
fig. 7 is a schematic view of the instrument assembly of fig. 1 in use, wherein (a) is a front view and (b) is a side view.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The utility model provides a bone cement apparatus subassembly, as shown in fig. 1-7, including sleeve pipe 1, install at the inside propeller 2 of sleeve pipe 1 and install at the outside casing locking device 3 of sleeve pipe 1, wherein:
as shown in fig. 2-3, the cannula 1 may specifically include a body 11 and a body handle 12 positioned over the body 11, the cannula 1 serving as a bone cement delivery channel;
as shown in fig. 4, the pusher 2 may specifically include a push rod 21 and a push rod handle 22 located above the push rod 21, the pusher 2 is used for pushing the bone cement in the cannula 1 downwards to the interior of the vertebral body after passing through the pedicle screw, so as to know that the outer diameter of the push rod 21 is equal to the inner diameter of the tube body 11; furthermore, the push rod 21 may be provided with an identification marking line 211 for indicating the pushing amount of the bone cement in the bone cement cannula;
as shown in fig. 7, the pedicle screw 5 generally includes a screw body 51 with threads and a U-shaped groove 52 located above the screw body 51, a bone cement passage is provided in the screw body 51, an entrance of the bone cement passage on the screw body 51 is a bone cement hole (not shown), the pedicle screw 5 may be in various forms, including minimally invasive or open, unidirectional or multiaxial, and a screw tail opening or closing, etc., without affecting the implementation of the technical solution of the present application;
as shown in fig. 5, the cannula lock 3 includes a limiting tube 31, a lower portion of the limiting tube 31 is provided with a connecting structure 311 for connecting a U-shaped groove of the pedicle screw, the cannula lock 3 is used for locking the cannula 1 on the pedicle screw, the limiting tube 31 is used for accommodating the cannula 1 to lock the cannula 1, so that the inner diameter of the limiting tube 31 is equal to the outer diameter of the tube body 11 as well known; in order to improve the locking effect, the inner side of the upper part of the limiting pipe 31 is provided with an elastic friction piece, the elastic friction piece has the advantages that the elastic friction piece can be popped out or contracted in a self-adaptive manner, the limiting pipe 31 can not be influenced to accommodate the sleeve 1, and the friction force between the limiting pipe and the sleeve can be increased, so that the freedom degree of the sleeve 1 perpendicular to the direction of the bone cement hole of the pedicle screw is completely limited, the sleeve 1 is prevented from swinging, the smooth injection of the bone cement during the operation is better ensured, the bone cement leakage caused by poor sealing performance is reduced or avoided, and the operation risk of a patient is reduced; the elastic friction pieces can be specifically a marble 315, a spring plate or a ball plunger with a spring, and the like, and the number of the elastic friction pieces can be single or paired;
as shown in fig. 2-3 and 6, the lower end of the cannula 1 is provided with a hollow plug 4, the plug 4 sequentially comprises, from bottom to top, a guide portion 41 for inserting a cement hole in the pedicle screw body, a tapered portion 42 for blocking the cement hole in the pedicle screw body, a crossbar portion 43 (adopting a profiling design for the U-shaped groove of the pedicle screw) for being horizontally arranged in the U-shaped groove of the pedicle screw, and a connecting portion 44 for connecting with the lower end of the cannula 1;
a jack (not shown) is arranged in the connecting part 44, the diameter of the jack is equal to the outer diameter of the tube body 11 of the sleeve 1, and the lower end of the tube body 11 of the sleeve 1 is inserted in the jack; optionally, the pipe body 11 of the sleeve 1 and the connecting portion 44 of the plug 4 are fixedly connected together by using an injection molding process;
the material of the plug 4 is a high polymer material.
The utility model discloses a bone cement apparatus subassembly, sleeve pipe lower extreme are provided with the end cap, and supreme guide portion, toper portion, horizontal pole portion and the connecting portion of including in proper order are followed to the end cap, and guide portion can make things convenient for the end cap to insert to the bone cement downthehole on the pedicle of vertebral arch screw nail body, and horizontal pole portion can improve the fastness after the end cap is put, because the end cap has certain elasticity for macromolecular material, so toper portion can be better play sealed effect. The plug can effectively reduce shaking and ensure the sealing property.
Therefore, the utility model discloses simple structure, convenient operation, it is more firm when contacting with pedicle of vertebral arch screw, the leakproofness is good, effectively solves the bone cement injection problem of doing the backbone internal fixation operation to the osteoporosis patient to and effectively reduce or reduce the harm of bone cement seepage. The utility model discloses it pours into appurtenance into as the bone cement who solves backbone osteoporosis, strengthens internal fixation to suit.
Considering that the guiding part 41 is only convenient for inserting the plug 4 into the bone cement hole on the pedicle screw body without overlong, the height thereof can be only 1-5 mm; to ensure the sealing, the tapered portion 42 preferably extends for a certain length, so that its height may be 3-6mm, and the taper is preferably 7-15 degrees; the insertion hole in the connection portion 44 preferably has a depth to prevent the body 11 of the sleeve 1 from coming out therefrom and ensure sealability therein, so that the depth of the insertion hole may be 5 to 20 mm.
For facilitating the connection of the sleeve locking device 3 and the pedicle screw, the connecting structure 311 on the limiting tube 31 can be designed for the plug screw in the U-shaped groove of the pedicle screw in spinal surgery, and the working principle of the plug screw of the product is simulated during working, namely: the connection structure 311 on the limiting tube 31 may be an external thread provided on the lower portion of the limiting tube 31, which is adapted to the internal thread of the U-shaped groove of the pedicle screw. In order to increase the stability of the stopper 4 in the vertical direction, the height H between the upper edge of the connecting portion 44 and the lower edge of the crossbar portion 43 is preferably designed (see fig. 7): after the lower part (i.e. the connecting structure 311) of the limiting tube 31 is connected with the U-shaped groove 52 of the pedicle screw 5 in place, the lower edge of the limiting tube 31 abuts against the upper surface of the connecting part 44, so that the sleeve locking device 3 plays a role of locking the sleeve and simultaneously plays a role of vertically extruding and fixing the plug, and the using effect is better.
As shown in fig. 5, the limiting tube 31 may be provided with a laser score line 312 for indicating the fitting depth of different pedicle screws, so as to prevent the plug 4 from being damaged due to excessive depth. To facilitate the operation of the restraining tube 31, the cannula lock 3 may further include a knob 313 disposed at an upper end of the restraining tube 31, and an outer surface of the knob 313 may be provided with a vertical anti-slip structure, such as an ergonomically designed hexagonal quincunx structure as shown in the drawings. In addition, for convenient operation and reduction of the requirement on the machining precision, the side face of the limiting pipe 31 can be provided with a through groove 314 (penetrating through the knob 313) at the same time), so that the limiting pipe 31 is in a U shape on the cross section (as shown in fig. 5 (c), the structural design of a mechanical platform scale weight is used for reference), the width of the through groove 314 is larger than or equal to the outer diameter of the pipe body 11 of the sleeve pipe 1, thus when the sleeve pipe locking device is used, the sleeve pipe does not need to be inserted in advance into the sleeve pipe locking device, the sleeve pipe locking device can be close to the sleeve pipe from the side face and locked after the sleeve pipe and the plug are placed.
The middle part of the upper part of the tube body handle 12 can be provided with a thread column 121, and the lower part of the push rod handle 22 can be provided with an internal thread groove (not shown) matched with the thread column 121, so that the bone cement can be injected more easily in a rotating mode at the final stage of the bone cement injection because the bone cement injection needs larger pressure. The tube body handle 12 and the push rod handle 22 can be designed with lines meeting human engineering requirements so as to improve the use hand feeling of a doctor during an operation and facilitate pinching during the operation.
The tube body handle 12 and the push rod handle 22 are preferably made of polymer materials, and the tube body 11, the push rod 12 and the cannula lock 3 are preferably made of metal materials, such as stainless steel.
Reference may be made to the following for the intraoperative use of the bone cement device assembly of the embodiment shown in fig. 1-7: after the pedicle screw is implanted into a human body, the plug is connected to the lower end of the sleeve, then the sleeve is aligned to the pedicle screw and is placed into the pedicle screw, the plug is plugged in a cement hole of the pedicle screw body, then the sleeve locker is close to the sleeve from the side, the sleeve body enters the limiting pipe of the sleeve locker, the limiting pipe is connected to the U-shaped groove of the pedicle screw by rotating the limiting pipe through the knob on the limiting pipe, the sleeve is locked, and finally, cement is injected into the sleeve, and the cement in the sleeve is injected into the vertebral body through the pedicle screw by the propeller.
To sum up, the product of the utility model is simple in structure, convenient operation closely laminates through macromolecular material and pedicle of vertebral arch screw bone cement hole, and locking through sleeve pipe locker makes the sleeve pipe fixed more firm, and the leakproofness is better, effectively solves the bone cement injection problem of doing the backbone internal fixation operation to the osteoporosis patient to and effectively reduce or reduce the harm of bone water seepage.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A bone cement apparatus component comprises a sleeve, a propeller arranged inside the sleeve and a sleeve locker arranged outside the sleeve, wherein the sleeve locker comprises a limit pipe, the lower part of the limit pipe is provided with a connecting structure for connecting a U-shaped groove of a pedicle screw,
the lower end of the sleeve is provided with a hollow plug, and the plug sequentially comprises a guide part for inserting a bone cement hole on the pedicle screw body, a conical part for plugging the bone cement hole on the pedicle screw body, a transverse rod part horizontally arranged in a U-shaped groove of the pedicle screw and a connecting part for connecting with the lower end of the sleeve from bottom to top;
a jack is arranged in the connecting part, the diameter of the jack is equal to the outer diameter of the tube body of the sleeve, and the lower end of the tube body of the sleeve is inserted in the jack;
the plug is made of a high polymer material;
and an elastic friction piece is arranged on the inner side of the upper part of the limiting pipe.
2. The bone cement apparatus assembly as claimed in claim 1, wherein the taper of the tapered portion is 7-15 degrees.
3. The bone cement device assembly as claimed in claim 1, wherein the height of the pilot portion is 1-5mm, the height of the tapered portion is 3-6mm, and the depth of the insertion hole in the connection portion is 5-20 mm.
4. The bone cement apparatus assembly as claimed in claim 1, wherein the connection structure on the restraining tube is an external thread provided on a lower portion of the restraining tube, the external thread conforming to an internal thread of a U-shaped slot of a pedicle screw.
5. The bone cement apparatus assembly as claimed in claim 4, wherein the height between the upper edge of the connecting portion to the lower edge of the crossbar portion is designed such that the lower edge of the restraining tube abuts against the upper surface of the connecting portion when the lower portion of the restraining tube is in place in connection with the U-shaped channel of the pedicle screw.
6. The bone cement instrument assembly as claimed in claim 1, wherein the limiting tube is provided with laser marking lines for indicating the fitting depth of different pedicle screws, and/or the push rod of the pusher is provided with identification marking lines for indicating the pushing amount of the bone cement in the sleeve.
7. The bone cement appliance assembly as claimed in claim 1, wherein the elastic friction member is a marble, a spring plate or a ball plunger with a spring.
8. The bone cement apparatus assembly as claimed in any one of claims 1-7, wherein the cannula lock further comprises a knob disposed at an upper end of the stop tube, an outer surface of the knob being provided with a vertical anti-slip feature.
9. The bone cement instrument assembly as claimed in claim 8, wherein the side of the stopper tube is provided with a through slot having a width equal to or greater than the outer diameter of the body of the cannula.
10. The bone cement apparatus assembly as claimed in claim 8, wherein the sleeve comprises a tube body and a tube body handle located above the tube body, the pusher comprises a push rod and a push rod handle located above the push rod, a threaded post is provided in the middle of the upper portion of the tube body handle, and an internal threaded groove matched with the threaded post is provided in the lower portion of the push rod handle.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020334871.8U CN212438800U (en) | 2020-03-17 | 2020-03-17 | Bone cement apparatus assembly |
| DE202021100638.2U DE202021100638U1 (en) | 2020-03-17 | 2021-02-09 | A bone cement instrument component for a spine |
| FR2101588A FR3108248B3 (en) | 2020-03-17 | 2021-02-18 | Spinal bone cement device assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020334871.8U CN212438800U (en) | 2020-03-17 | 2020-03-17 | Bone cement apparatus assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212438800U true CN212438800U (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020334871.8U Active CN212438800U (en) | 2020-03-17 | 2020-03-17 | Bone cement apparatus assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212438800U (en) |
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2020
- 2020-03-17 CN CN202020334871.8U patent/CN212438800U/en active Active
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