CN213787723U - Pedicle screw percutaneous implantation device - Google Patents
Pedicle screw percutaneous implantation device Download PDFInfo
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- CN213787723U CN213787723U CN202022188967.0U CN202022188967U CN213787723U CN 213787723 U CN213787723 U CN 213787723U CN 202022188967 U CN202022188967 U CN 202022188967U CN 213787723 U CN213787723 U CN 213787723U
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- pedicle screw
- screw sleeve
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Abstract
The utility model provides a pedicle screw percutaneous implantation device, which comprises a pedicle screw percutaneous casing, a locking bolt, a locking ring, a screw sleeve and a ball head screw, wherein the distal end surface of the pedicle screw percutaneous casing extends out of two-wing convex parts along the distal direction, the inner sides of the two-wing convex parts are provided with inverted taper dovetail heads, and the outer side surface of the screw sleeve is provided with two inverted taper dovetail grooves matched with the inverted taper dovetail heads; when the inverted taper dovetail convex head and the inverted taper dovetail groove are matched, the distal end face of the pedicle screw percutaneous casing is contacted with the proximal end face of the screw sleeve, and axial limiting is realized. The utility model realizes the function of the integrated ultra-long arm pedicle screw and can carry out the external vertebral body compression and distraction operation mode by the special connection mode of matching the taper dovetail raised head and the inverted taper dovetail groove; the utility model discloses still simple structure, processing realizes conveniently, because sleeve pipe and pedicle screw dismantle conveniently, reduces the time of operation, has reduced patient's amount of bleeding, has also reduced the recovery time of postoperative.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a pedicle screw percutaneous implantation device.
Background
At present, the thoracolumbar degenerative disease is treated by surgeries at home and abroad, and the thoracolumbar degenerative disease is usually fixed by a posterior spinal nail-rod system. With the continuous development of clinical imaging technology, open surgery of maintaining stable fixation by a posterior nail-rod system is gradually replaced by percutaneous surgery, the percutaneous surgery has short time, less bleeding and less postoperative inflammation, and makes great contribution to the development of posterior spinal fixation. Thereby, the pedicle screw with the overlength arm screw sleeve is extended.
Although the application of the percutaneous pedicle screw is quite popular, the long-arm screw tail only has the function of being used in the percutaneous operation process from the perspective of product use, and is discarded after the operation. In terms of the use safety of the product, the processing availability of the product and the spreading waste of materials, the instrument introducing a single pedicle screw percutaneous casing is necessary to replace the overlong arm thread sleeve in the percutaneous pedicle screw.
In the process of developing the percutaneous sleeve of the pedicle screw, flexible connection and disassembly of a screw sleeve structure, realization of surgery operation channels by reserving space, consideration of irritation of soft tissues by designing a structure and the like need to be considered, and meanwhile, the steps of compression and distraction of the pedicle screw in vitro need to be realized.
For the percutaneous cannula of the existing pedicle screw (hereinafter referred to as cannula), at present, the elastic property is mainly fixed by adopting a metal material, and the cannula is connected with the vertebral body screw sleeve through a guiding anti-rotation structure, for example, patent CN 104095673 a. The convenient performance of the connection can meet the requirement of surgical operation, and the anti-rotation force of the connection can also meet the clinical requirement. However, when the operation of compressing and expanding the vertebral body in vitro is needed in the operation, the situation that the sleeve is separated from the screw sleeve often occurs due to the problem of the fixing rigidity of the instrument.
Another structure is designed to implement an internal screw type fixation based on a metal material fixation elastic fixation, for example, patent CN 110169815A. The structural design is complex, and the structure cannot always keep the smooth of the channel due to the requirement of the operation, and the percutaneous operation of the pedicle screw is realized by repeatedly screwing and removing the internal thread. At the same time, the structure has not truly achieved process availability.
Therefore, the pedicle screw percutaneous implantation device which can be conveniently installed and disassembled, can realize the functions of compressing and expanding the vertebral body in vitro and is stably connected and fixed is designed, and is an important research direction.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device is implanted to pedicle of vertebral arch nail percutaneous to prior art's defect.
The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:
a pedicle screw percutaneous implantation device comprises a pedicle screw percutaneous casing, a locking bolt, a locking ring, a screw sleeve and a ball head screw, wherein the distal end surface of the pedicle screw percutaneous casing extends out of two wing convex parts along the distal direction, the inner sides of the two wing convex parts are provided with inverted taper dovetail convex heads, and the outer side surface of the screw sleeve is provided with two inverted taper dovetail grooves matched with the inverted taper dovetail convex heads; when the inverted taper dovetail raised head is matched with the inverted taper dovetail groove, the distal end face of the pedicle screw percutaneous casing is contacted with the proximal end face of the screw sleeve, so that axial limiting is realized.
Preferably, the two symmetrical protruding parts of the locking ring are clamped with the groove on the inner side of the screw sleeve; the outer side of the locking bolt is in threaded fit with the inner side of the screw sleeve; the connecting rod penetrates through the two U-shaped grooves of the screw sleeve and is fixed between the locking ring and the locking bolt, and the connecting rod is fixed on the screw sleeve through the matching of the locking ring, the locking bolt and the screw sleeve.
Further, the ball head of the ball head nail is clamped in the screw sleeve through a distal end opening of the screw sleeve; the locking ring is pressed on the ball head to assist the connecting rod and the locking bolt to apply pressure to the ball head nail, so that the screw sleeve and the ball head nail are fastened and fixed.
Preferably, the width of the two wing bulges of the pedicle screw percutaneous casing is 0.1-0.3 mm smaller than that of the U-shaped groove of the screw sleeve.
Preferably, the screw sleeve has a deflection angle of 0-40 degrees relative to the axis of the ball stud.
Preferably, the proximal end face of the locking bolt is provided with a quincuncial rotating groove.
Preferably, the rotary terminal end of the inverted taper dovetail groove is sealed.
Preferably, the distance between the inverted taper dovetail groove and the proximal end face of the screw sleeve is consistent with the length of the two wing bulges.
Preferably, the material is titanium alloy or stainless steel.
The utility model adopts the above technical scheme, compare with prior art, have following technological effect:
(1) the utility model stably fixes the pedicle screw percutaneous sleeve and the pedicle screw through the special connection mode of matching the taper dovetail raised head and the inverted taper dovetail groove, thereby realizing the function of the integrated overlong arm pedicle screw;
(2) the utility model has simple structure and convenient processing realization, greatly reduces the problem of difficult processing of production enterprises if the apparatus is popularized in production, and can greatly improve the production efficiency of the pedicle screw, and the processing speed can be improved by half through the prior production experience;
(3) in the operation process, the sleeve and the pedicle screw can be reliably fixed, so that a clinician can feel comfortable in the use process when the external vertebral body compression and distraction operation mode needs to be carried out;
(4) the sleeve and the pedicle screw are convenient to disassemble, so that the time of operation is reduced, the bleeding volume of a patient is reduced, and the recovery time after operation is also reduced;
(5) the structure of the utility model also avoids the risk that the broken arm breaks the remaining sharp part to stimulate the subcutaneous tissue in the operation process, and reduces the probability of postoperative inflammation;
(6) the utility model discloses an among the clinical application, in view of pedicle screw percutaneous sleeve pipe is the apparatus that a cooperation was used, for this titanium alloy raw and other materials that adopt as the processing of implantation pedicle screw product will reduce to 60% -70%, and here simultaneously, the raw and other materials of each side, all will significantly reduce like packing raw and other materials.
Drawings
FIG. 1 is a schematic view of the structure of the pedicle screw percutaneous implantation device of the present invention cooperating with a connecting rod;
fig. 2 is a sectional view of a pedicle screw of the present invention;
FIG. 3 is a schematic view showing the separation of the percutaneous casing and the screw sheath of the pedicle screw of the present invention;
FIG. 4 is a schematic view of U-shaped groove for inserting a screw sleeve into a percutaneous cannula of a pedicle screw in the present invention;
FIG. 5 is a schematic view of the fixation of the pedicle screw percutaneous cannula and the screw sheath in the present invention;
FIG. 6 is a schematic view of the structure of the screw sleeve of the present invention;
FIG. 7 is a schematic view of a percutaneous cannula of a pedicle screw according to the present invention;
FIG. 8 is a schematic view of a locking ring structure of the present invention;
the reference numerals denote the description:
1-pedicle screw percutaneous casing, 11-two wing bulge parts, 12-inverted taper dovetail raised head, 2-locking bolt, 3-connecting rod, 4-locking ring, 5-screw sleeve, 51-inverted taper dovetail groove, 6-ball head screw and 61-ball head.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.
Referring to fig. 1-2, the present embodiment provides a pedicle screw percutaneous implantation device, including a pedicle screw percutaneous casing 1, a locking bolt 2, a locking ring 4, a screw sleeve 5 and a ball nail 6, wherein the distal end surface of the pedicle screw percutaneous casing 1 extends out of two wing protrusions 11 along the distal direction, the inner sides of the two wing protrusions 11 are provided with inverted taper dovetail bosses 12, and the outer side surface of the screw sleeve 5 is provided with two inverted taper dovetail grooves 51 matched with the inverted taper dovetail bosses; when the inverted taper dovetail raised head 12 is matched with the inverted taper dovetail groove 51, the distal end face of the pedicle screw percutaneous casing 1 is contacted with the proximal end face of the screw sleeve 5, so that axial limiting is realized.
In this embodiment, as shown in fig. 3, two symmetrical protruding parts of the locking ring 4 are engaged with the groove inside the screw sleeve 5; the outer side of the locking bolt 2 is in threaded fit with the inner side of the screw sleeve 5; the connecting rod 3 penetrates through the two U-shaped grooves of the screw sleeve 5 and is fixed between the locking ring 4 and the locking bolt 2, and the connecting rod 3 is fixed on the screw sleeve 5 through the matching of the locking ring 4, the locking bolt 2 and the screw sleeve 5; the ball 61 of the ball stud 6 is clamped in the screw sleeve 5 through the distal end opening of the screw sleeve 5; the locking ring 4 is pressed on the ball head 61, the auxiliary connecting rod 3 and the locking bolt 2 apply pressure to the ball head nail 6, and the fastening and fixing of the screw sleeve 5 and the ball head nail 6 are achieved.
In this embodiment, the width of the two wing protrusions 11 of the pedicle screw percutaneous casing 1 is 0.1-0.3 mm smaller than the width of the U-shaped groove of the screw sleeve 5, and more preferably 0.2 mm. When the pedicle screw percutaneous casing 1 and the screw sleeve 5 need to be fixed, the two wing convex parts 11 of the pedicle screw percutaneous casing 1 are aligned with the U-shaped groove of the screw sleeve 5, as shown in fig. 3; then the two wing bulges 11 of the pedicle screw percutaneous casing 1 are placed along the U-shaped groove of the screw sleeve 5, as shown in figure 4; when unable axial push-in again, pedicle screw percutaneous sleeve 1 and 5 axial counterpoints of screw cover this moment, clockwise rotation pedicle screw percutaneous sleeve 1, cooperate back taper forked tail plush head 12 and two back taper dovetail 51, as in fig. 5, realize the fastening of pedicle screw percutaneous sleeve 1 and screw cover 5 promptly and fix, under the prerequisite of not applying anticlockwise power, two parts can't throw off, become the overlength arm pedicle screw that can open up percutaneous surgery promptly, and the U type groove of screw cover 5 is counterpointed completely with pedicle screw percutaneous sleeve 1's U type groove, as in fig. 4.
In this embodiment, the screw sleeve 5 has a deflection angle of 0 to 40 degrees with respect to the axis of the ball stud 6. During operation, the locking ring 4 is pressed down by the connecting rod 3, and the ball head nail 6 is pressed down by the locking ring 4 to form tension and is fixed at a certain angle relative to the screw sleeve 5.
In this embodiment, the proximal end surface of the locking bolt 2 is provided with a quincuncial rotating groove. The locking bolt 2 is in threaded fit with the screw sleeve 5, and the locking bolt 2 is rotated through a quincuncial rotating groove by a special external instrument to apply a screwing force.
In this embodiment, as shown in fig. 6, the rotary terminal of the inverted taper dovetail groove 51 is sealed and also firmly fixed; the distance between the inverted taper dovetail groove 51 and the proximal end face of the screw sleeve 5 is consistent with the length of the two wing convex parts 11, the two wing convex parts 11 of the pedicle screw percutaneous casing 1 are placed along the U-shaped groove of the screw sleeve 5, and the pedicle screw percutaneous casing 1 cannot be pushed in axially, namely, the distal end face of the pedicle screw percutaneous casing 1 is in contact with the proximal end face of the screw sleeve 5.
In this embodiment, all the parts are made of titanium alloy or stainless steel.
The application method of the pedicle screw percutaneous implantation device in the embodiment in the operation specifically comprises the following steps:
s1: before an operation, an operator can make an operation scheme according to the bone of a patient and different physiological conditions;
s2: before the ball head nail 6 is not implanted into the vertebral body, the two wing convex parts 11 of the pedicle nail percutaneous casing 1 are placed along the U-shaped groove of the screw sleeve 5 (see fig. 3-4), when the far end surface of the pedicle nail percutaneous casing 1 is contacted with the near end surface of the screw sleeve 5 (namely, when the pedicle nail percutaneous casing cannot be axially pushed any more), the pedicle nail percutaneous casing 1 and the screw sleeve 5 are axially aligned (see fig. 4), the pedicle nail percutaneous casing 1 is rotated clockwise, the inverted taper dovetail convex head 12 is matched with the two inverted taper dovetail grooves 51 (see fig. 5), and the pedicle nail percutaneous casing 1 and the pedicle nail are stably fixed and are converted into the ultra-long arm pedicle nail;
s3: along the inner hole channel of the pedicle screw percutaneous casing 1, a proper surgical instrument is adopted, a ball head nail 6 is implanted into the vertebral body of a patient after surgery, a locking ring 4 is placed into a screw sleeve 5, a connecting rod 3 is placed into a U-shaped groove at the upper end of the implanted screw sleeve 5 through the U-shaped groove in the pedicle screw percutaneous casing 1, and a locking bolt 2 is screwed down through a special instrument, so that the vertebral body is stably fixed;
s4: (optional implementation step): if the external compression and distraction operation is required, the compression and distraction instrument can be erected to the outer side and the inner side of the two pedicle screws, so that vertebral compression and distraction operations can be easily carried out;
s5: the pedicle screw percutaneous casing 1 is rotated anticlockwise until the pedicle screw percutaneous casing cannot rotate any more (due to the placement of the connecting rod 3), lifted upwards lightly, and the pedicle screw percutaneous casing 1 and the screw sleeve 5 are disassembled through the exit channel on the screw sleeve 5.
The present invention has been described in detail with reference to the specific embodiments, but the present invention is only by way of example and is not limited to the specific embodiments described above. Any equivalent modifications and substitutions to the disclosed embodiments are within the scope of the present invention as those skilled in the art will recognize. Accordingly, variations and modifications in equivalents may be made without departing from the spirit and scope of the invention, which is intended to be covered by the following claims.
Claims (9)
1. A pedicle screw percutaneous implantation device comprises a pedicle screw percutaneous casing (1), a locking bolt (2), a locking ring (4), a screw sleeve (5) and a ball head screw (6), and is characterized in that the distal end surface of the pedicle screw percutaneous casing (1) extends out of two-wing convex parts (11) along the distal direction, the inner sides of the two-wing convex parts (11) are provided with inverted taper dovetail bosses (12), and the outer side surface of the screw sleeve (5) is provided with two inverted taper dovetail grooves (51) matched with the inverted taper dovetail bosses; when the inverted taper dovetail raised head (12) is matched with the inverted taper dovetail groove (51), the distal end face of the pedicle screw percutaneous casing (1) is contacted with the proximal end face of the screw sleeve (5), and axial limiting is realized.
2. The percutaneous implantation device of pedicle screws according to claim 1, wherein two symmetrical protruding parts of the locking ring (4) are engaged with a groove inside the screw sleeve (5); the outer side of the locking bolt (2) is in threaded fit with the inner side of the screw sleeve (5); the connecting rod (3) penetrates through the two U-shaped grooves of the screw sleeve (5) and is fixed between the locking ring (4) and the locking bolt (2), and the connecting rod (3) is fixed on the screw sleeve (5) through the matching of the locking ring (4), the locking bolt (2) and the screw sleeve (5).
3. The percutaneous pedicle screw implantation device according to claim 2, wherein the ball head (61) of the ball head screw (6) is clamped in the screw sleeve (5) through a distal port of the screw sleeve (5); the locking ring (4) is pressed on the ball head (61) to assist the connecting rod (3) and the locking bolt (2) to apply pressure on the ball head nail (6), so that the screw sleeve (5) and the ball head nail (6) are fastened and fixed.
4. The percutaneous pedicle screw implantation device according to claim 1, wherein the width of the two wing protrusions (11) of the percutaneous pedicle screw sleeve (1) is 0.1-0.3 mm smaller than the width of the U-shaped groove of the screw sleeve (5).
5. The pedicle screw percutaneous implantation device according to claim 1, wherein the screw sleeve (5) has a deflection angle of 0-40 ° relative to the axial center of the ball head screw (6).
6. The percutaneous implantation device of the pedicle screw as claimed in claim 1, wherein the proximal end face of the locking bolt (2) is provided with a quincunx rotating groove.
7. The pedicle screw percutaneous implantation device according to claim 1, wherein a rotation terminal end of the inverted taper dovetail groove (51) is sealed.
8. The percutaneous pedicle screw implantation device according to claim 1, wherein the distance between the inverted taper dovetail groove (51) and the proximal end face of the screw sleeve (5) is consistent with the length of the wing protrusions (11).
9. The pedicle screw percutaneous implantation device according to claim 1, wherein the material is titanium alloy or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022188967.0U CN213787723U (en) | 2020-09-29 | 2020-09-29 | Pedicle screw percutaneous implantation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022188967.0U CN213787723U (en) | 2020-09-29 | 2020-09-29 | Pedicle screw percutaneous implantation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213787723U true CN213787723U (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022188967.0U Active CN213787723U (en) | 2020-09-29 | 2020-09-29 | Pedicle screw percutaneous implantation device |
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|---|---|
| CN (1) | CN213787723U (en) |
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- 2020-09-29 CN CN202022188967.0U patent/CN213787723U/en active Active
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