CN102920502A - Extension sheets of pedicle screw tail, expander, and tamper reset rod - Google Patents
Extension sheets of pedicle screw tail, expander, and tamper reset rod Download PDFInfo
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- CN102920502A CN102920502A CN2012104485750A CN201210448575A CN102920502A CN 102920502 A CN102920502 A CN 102920502A CN 2012104485750 A CN2012104485750 A CN 2012104485750A CN 201210448575 A CN201210448575 A CN 201210448575A CN 102920502 A CN102920502 A CN 102920502A
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Abstract
The invention discloses extension sheets of a pedicle screw tail, wherein two extension sheets are arranged oppositely on the tail part of a pedicle screw; the extensions sheets are flexible extension sheets; because the extension sheets are designed in a flexible manner, namely the extension sheets has elastic and bendable characteristics; the extension sheets on subcutaneous part can be elastically bent under the effect of external force; expansion tendency cannot be extended to an epithelial part; muscle on the subcutaneous part is only extruded so as to keep a small notch; when threading bar operation is processed by a reset bar, an enough threading bar space can be provided because two extension sheets on the subcutaneous part are bent so as to be expanded and separated; thus, the threading bar operation is processed easily so as to reduce risk of minimally invasive surgeries. An expanded and a tamper reset rod which are matched with the extension sheets are also disclosed by the invention.
Description
Technical field
The present invention relates to technical field of medical instruments, the particularly prolongation sheet of a kind of pedicle nail nail tail, and the dilator, the pressure bar release link that are used with this prolongation sheet.
Background technology
The internal fixation of spine technology can be summarised as two steps simply: whole first, and rear part.Namely first reposition lever is pre-bent to human spine's bending shape and links to each other with spinal column by pedicle nail etc.; Strut again/pressurize, then reposition lever finally is locked on the pedicle nail.
The step of the operation technique of internal fixation of spine technology is:
1, prepares before the art: carry out the selection of pedicle nail (length and diameter);
2, pedicle nail location and nail road are prepared;
3, implant pedicle nail to human body;
4, put rod.The tail end of general pedicle nail has the long U-shaped groove laterally of opening, puts the excellent reposition lever that is about to and inserts in the U-shaped groove of pedicle nail;
5, reposition lever is pressed in the U-shaped groove, and locks temporarily.This step mainly is in order reposition lever to be pressed onto the bottom of the U-shaped groove of pedicle nail, simultaneously reposition lever to be locked in advance, and the instrument of pressure bar comprises pressure bar device, breast-stroke pincers etc.
6, carry out strutting or pressurizeing of vertebral body along the direction of reposition lever.
7, final locking.By plug screw reposition lever is locked in the U-shaped groove, the cell wall of U-shaped groove has screw thread, thus plug screw threaded engagement locking reposition lever with it.
Above-described is the whole process of open surgery.Open surgery is put the operations such as rod, pressure bar and is all directly carried out at opening part, therefore, needs large otch, and large otch can cause nonvolatil injury to some soft tissues of human body, and the post-operative recovery time is longer.
For the shortcoming of open surgery, produced the mini-invasive incision therapy, this therapy is mainly by means of the prolongation sheet of pedicle nail afterbody.The pedicle nail afterbody has U-lag, and the rigidity that the U-lag two opposite side walls has respectively extension prolongs sheet, and namely two prolongation sheets are oppositely arranged, and when little otch, a part that prolongs sheet is positioned at outside the skin, and a part is positioned within the skin.Pressure bar, put clubs and do and under the guide effect that prolongs sheet, to carry out, need not large otch.When putting rod by the realization of prolongation sheet, be that reposition lever is prolonged between sheets from penetrating one by one other between the prolongation sheet of a pedicle nail.
Yet the clubs of wearing in the above-mentioned minimally-invasive treatment has difficulties.Because prolonging sheet can not flexural deformation in operation, immutable for two spaces that prolong between the sheets that reposition lever passes, what cause reposition lever penetrates the operation easier height, and risk is large.
In addition, during the pressure bar operation, the pressure bar device of configuration need to arrange two guide posts, and guide post joins with prolongation sheet rigidity, need guide post when the depression bar of pressure bar device moves axially, guarantee moving direction, to compress reposition lever, the pressure bar device complex structure of this structure is not easy to operation, and operation risk is larger.
In view of this, how improving the prolongation sheet of pedicle nail nail tail, operate in the minimally-invasive treatment and can carry out smoothly so that wear rod, reduce operation risk, is those skilled in the art's technical issues that need to address.
Summary of the invention
For solving the problems of the technologies described above, purpose of the present invention is prolongation sheet that a kind of pedicle nail nail tail is provided and dilator, pressure bar release link.This prolongs sheet under the prerequisite that guarantees mini-invasive incision, and enough excellent spaces of wearing can be provided, thereby reduces the risk of Minimally Invasive Surgery.
The prolongation sheet of the pedicle nail nail tail that provides, two prolong the afterbody that sheet is relatively arranged on pedicle nail, and described prolongation sheet is the flexible sheet that prolongs.
Preferably, an end of described prolongation sheet offers the hole clipping that snaps in for the horizontal boss of pedicle nail nail tail; This end of described prolongation sheet also is provided with the flexible card article relative with described hole clipping, and the both sides of described card article and described prolongation sheet form the snap ring that snaps in to boss for pedicle nail nail tailing axle.
Preferably, the both sides that described prolongation sheet is provided with an end of described hole clipping are equipped with the bending sidewall, and described card article and two described bending sidewalls form described snap ring; The axial boss of described card article and described pedicle nail nail tail, the contact surface of the two is suitable.
Preferably, the end away from pedicle nail is provided with the boss that extends laterally on the described prolongation sheet.
Prolongation sheet among this embodiment is when carrying out the Minimally Invasive Surgery of little otch: at first, will be equipped with in from childhood otch implantation of the pedicle nail spinal column that prolongs sheet; Then, expanding separation by prolonging the part that sheet is positioned under the skin, is flexible owing to prolong sheet, and its expansion trend can not extend to part on the skin, only gets final product subcutaneous muscle is pushed, thereby keeps little otch; Carry out again the clubs of wearing of reposition lever and do, owing to two subcutaneous prolongation sheets part quilt expansion separation, thereby provide enough excellent spaces of wearing, be easy to carry out so that wear clubs, thus the risk of reduction Minimally Invasive Surgery.
The present invention also provides a kind of dilator be used to expanding above-mentioned each described prolongation sheet, and described dilator comprises two bodies of rod that are hinged; The every described body of rod comprises expansion head and the expansion foot that joins, and the connecting position of the two is articulated position; Two described expansion feet can stretch into two and prolong between the sheets, two under external force foldings of described expansion head with the end that drives two described expansion feet near or away from; Two described expansion foot ends away from the time can expand and separate two and prolong the part that sheets are positioned at skin inside.
This dilator can be positioned at part below the skin controlling expansion foot extend sheet outside the skin, and reaching does not affect little otch and enlarge again the purpose of wearing excellent space, thereby reduces the risk of Minimally Invasive Surgery.
Preferably, has spring between the two described expansion heads.
Preferably, two described expansion heads all are connected with the expansion handle.
Preferably, also comprise the housing that coats described expansion head, described spring and described articulated position, the both sides of described housing are provided with the cutting ferrule that inserts for described prolongation sheet.
Preferably, the end of described expansion foot has the clip that inserts for described prolongation sheet, and described clip has opening.
Preferably, two described expansion feet intersect.
The present invention also provides a kind of pressure bar release link, cooperate the compression reposition lever with above-mentioned each described prolongation sheet, it is characterized in that, described pressure bar release link comprises depression bar and can limit two described prolongation sheets along the Handheld Division that the pressure bar direction moves that described depression bar can insert in the described Handheld Division and slide in the axial direction in relatively described Handheld Division; The both sides of described depression bar one end are equipped with sleeve pipe, insert with the nail groove sidewall that supplies respectively two described prolongation sheets and pedicle nail.
This pressure bar release link cooperates with the flexible sheet that prolongs, and axially slides along prolonging sheet, and finally contacts release link, continues the application of force, and then the pressure bar release link can be overlapped the nail groove sidewall to pedicle nail, thereby release link is depressed into nail groove bottom land.This pressure bar release link cooperates with the above-mentioned flexible sheet that prolongs, utilize and prolong sheet as guide post, realized simply the pressure bar operation, and in sliding process, can make the prolongation sheet return to the front state of expansion, pressure bar is when following closely trench bottom, the sleeve pipe overcoat nail groove sidewall of pressure bar release link depression bar is realized follow-up reset operation (strutting/pressurize).
Preferably, the outer wall of described depression bar is provided with pawl, and described Handheld Division is provided with the latch that can snap in adjacent described pawl gap.
Preferably, the both sides of described Handheld Division are equipped with side opening, and the end away from pedicle nail on the described prolongation sheet is provided with the boss that extends laterally, and the side opening of described Handheld Division snaps in for described boss.
Preferably, the described depression bar end that is provided with sleeve pipe has the inner concave arc surface with the reposition lever surface engagement.
Description of drawings
Fig. 1 is the structural representation of a kind of specific embodiment of prolongation sheet of pedicle nail nail tail provided by the present invention;
Fig. 2 is the structural representation that prolongs another angle of sheet among Fig. 1;
Fig. 3 is the local enlarged diagram of aminoacyl site among Fig. 2;
Fig. 4 prolongs sheet to be mounted to a view in the pedicle nail afterbody process among Fig. 1;
Fig. 5 is the sketch map that prolongs among Fig. 1 after sheet is installed on pedicle nail nail tail.
Fig. 6 is the local enlarged diagram at B position among Fig. 4;
Fig. 7 is the local enlarged diagram at C position among Fig. 5;
Fig. 8 is the structural representation of a kind of specific embodiment of dilator provided by the present invention;
Fig. 9 is the structural representation behind the dilator holder housing among Fig. 8;
Figure 10 is dilator and the sketch map that prolongs sheet and cooperates and not yet strut the prolongation sheet among Fig. 8;
Figure 11 is that dilator expansion struts the structural representation that prolongs behind the sheet among Fig. 8;
Figure 12 is the structural representation of a kind of specific embodiment of pressure bar release link provided by the present invention;
Figure 13 is the sketch map in the pressure bar release link pressure bar process among Figure 12;
Figure 14 is the structural representation of pressure bar reposition lever pressure bar after complete among Figure 12;
Figure 15 is the local enlarged diagram at D position among Figure 13;
Figure 16 is the axial cutaway view of pressure bar release link among Figure 12;
Figure 17 is the local enlarged diagram at E position among Figure 16.
Among the figure:
1 prolongs sheet, 11 hole clippings, 12 card articles, 13 boss, 14 bending sidewalls, 2 pedicle nails, 21U type groove, 211 horizontal boss, 212 axial boss, 3 dilators, 31 bodies of rod, 311 expansion heads, 312 expansion feet, 313 articulated position, 32 expansion handles, 33 springs, 312a clip, 34 housings, 341 cutting ferrules, 4 pressure bar release links, 41 depression bars, 411 pawls, 412 sleeve pipes, 42 Handheld Divisions, 421 latches, 422 side openings, 5 reposition levers
The specific embodiment
In order to make those skilled in the art understand better technical scheme of the present invention, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1-5, Fig. 1 is the structural representation of a kind of specific embodiment of prolongation sheet of pedicle nail nail tail provided by the present invention; Fig. 2 is the structural representation that prolongs another angle of sheet among Fig. 1; Fig. 3 is the local enlarged diagram of aminoacyl site among Fig. 2; Fig. 4 prolongs sheet to be mounted to a view in the pedicle nail afterbody process among Fig. 1; Fig. 5 is the sketch map that prolongs among Fig. 1 after sheet is installed on pedicle nail nail tail.
The nail tail of pedicle nail 2 generally has the nail groove, U-shaped groove 21 as shown in the figure, prolong the two side that sheet 1 is installed on respectively the nail groove, i.e. the both sides sidewall of the U-shaped groove 21 shown in the figure in order to put 5, two of reposition levers, then two prolong the afterbody that sheet 1 is relatively arranged on pedicle nail 2, among Fig. 4,5, the prolongation sheet 1 of a side only is shown, prolonging sheet 1 is the flexible sheet that prolongs, namely this prolongation sheet 1 has the flexible characteristic of elasticity, can be out of shape under external force.
Shown in Fig. 6-7, Fig. 6 is the local enlarged diagram at B position among Fig. 4; Fig. 7 is the local enlarged diagram at C position among Fig. 5.
U-shaped groove 21 sidewalls of pedicle nail 2 nail tails have axial boss 212 and horizontal boss 211, offer the hole clipping 11 that snaps in for the horizontal boss 211 of pedicle nail 2 nail tails on the lamellar body of prolongation sheet 1 one ends; In addition, this end that prolongs sheet 1 also is provided with the flexible card article 12 that is oppositely arranged with hole clipping 11, and flexible card article 12 forms the snap ring that snaps in to boss 212 for pedicle nail 2 nail tailing axles with the both sides that prolong sheet 1.As shown in Figure 4, at first will prolong sheet 1 inclination certain angle (prolonging sheet 1 to another tilts), then axial boss 212 can be inserted in the hole clipping 11 that prolongs sheet 1, then, laterally (outside in the literary composition refers to the direction away from pedicle nail 2 axis) upset prolongs sheet 1 makes itself and pedicle nail 2 axially parallels, in switching process, owing to prolong the elasticity bendability characteristics of sheet 1, can produce certain strain in the switching process, then laterally boss 211 finally snaps in the hole clipping 11, and axial boss 212 finally is inserted in the snap ring, i.e. the assembling process of Fig. 4-5.
Further, prolong the both sides that sheet 1 is provided with an end of hole clipping 11 and all can be provided with bending sidewall 14, flexible card article 12 forms snap rings with two bending sidewalls 14, and as shown in Figure 3, so, prolonging sheet 1 can integrally formed snap ring, is easy to process.In addition, card article 12 and pedicle nail 2 nail tailing axles are to boss 212, and the contact surface of the two is suitable.As can be seen from Figure 3, the surface (face relative with hole clipping 11) that card article 12 is used for contact axial boss 212 is arcwall face, and is suitable with the arc outer wall of axial boss 212.
Prolongation sheet 1 after being in place according to above-mentioned inserting mode can't normally be dismantled with pedicle nail 2, can only carry out the destructiveness dismounting by special instrument, therefore, prolonging sheet 1 in the operation process can keep fixing with pedicle nail 2 all the time, thereby guarantees the safety of performing the operation.Prolong sheet 1 and also can take other connected modes to be connected with the nail tail of pedicle nail 2, certain such as clamping, weld, be threaded etc., above-mentioned inserting mode is the scheme of optimization comparatively.
Prolongation sheet 1 among this embodiment is when operation, part prolongs the outside that sheet 1 can be positioned at skin, part is co-located at skin inside with pedicle nail 2, because prolongation sheet 1 is the flexible sheet that prolongs, then be positioned at two of skin inside and prolong all under external force flexural deformation of sheet 1 part, two prolong sheet 1 can along opposite Direction distortion, can expand separation so that be positioned at two prolongation sheets, 1 part of skin inside.
Please continue the 8-11 with reference to figure, Fig. 8 is the structural representation of a kind of specific embodiment of dilator provided by the present invention; Fig. 9 is the structural representation behind the dilator holder housing among Fig. 8; Figure 10 is dilator and the sketch map that prolongs sheet and cooperates and not yet strut the prolongation sheet among Fig. 8; Figure 11 is that dilator struts the structural representation that prolongs behind the sheet among Fig. 8.
This dilator 3 comprises compares two bodies of rod 31 that connect, and is similar to the caliper structure.Every body of rod 31 comprises an expansion of joining 311 and expansion foot 312, and the connecting position of the two is articulated position 313, as shown in Figure 8, then two expansion 311 a under external force folding with the end that drives two expansion feet 312 near or away from.During operation, two expansion feet 312 are stretched into two to be prolonged between the sheet 1, shown in Figure 10,11, and the end that will expand foot 312 stretches under the skin, then hold two expansions 311 with a firm grip so that the two is mutually close, then two expansion feet 312 terminal away from adopted flexible design owing to prolong sheet 1, then want away from expansion foot 312 ends can drive two and prolong the part expansion separation that sheets 1 are positioned at skin inside.As shown in figure 11, two lower ends that prolong sheets 1 are strutted by two expansion feet 312 and elastic bending occur.
Prolongation sheet 1 among this embodiment, when carrying out the Minimally Invasive Surgery of little otch:
At first, will be equipped with in from childhood otch implantation of pedicle nail 2 spinal column that prolongs sheet 1;
Then, will prolong the part that sheet 1 is positioned under the skin by dilator 3 and expand separation, and take flexible design owing to prolong sheet 1, its expansion trend can not extend to part on the skin, only gets final product subcutaneous muscle is pushed, thereby keeps little otch;
Carry out again the clubs of wearing of reposition lever 5 and do, because subcutaneous two prolongation sheets, 1 part is expanded separation, thereby provide enough excellent spaces of wearing, be easy to carry out so that wear clubs, reduced the risk of Minimally Invasive Surgery.
For the dilator 3 among this embodiment, can also make further improvement.
As shown in Figure 8, two expansions 311 all are connected with expansion handle 32.Be difficult for holding when the manual operation as the expansion of the body of rod 31 parts 311, expansion handle 32 easy operatings are set.Among Fig. 8 two expansion handle 32 lays respectively at the both sides of two expansions 311, is circle drum, to improve hand-held comfort level, is convenient to control the folding of expansion foot 312.
Between two expansions 311 spring 33 can also be set, as shown in Figure 8.After spring 33 is set, without under the External Force Acting, expands the spacing maintenance of foot 312 and stablize, then in the process of dilator 3 and 1 cooperation of prolongation sheet, prolongation sheet 1 can accident not expanded because of the unstable state of expanding foot 312, affects otch; In addition, because the existence of spring 33 during to expansion handle 32 application of force, can be subject to the resistance of spring 33, help the medical worker to control the aperture of expansion foot 312, prevent from overexerting and cause error.
In addition, dilator 3 can also arrange the housing 34 that coats expansion 311, spring 33 and articulated position 313, the effect that housing 34 can play protection, support, and the while also can strengthen the intensity of dilator 3, increases the service life, as shown in Figure 9.In addition, the both sides of housing 34 can also arrange the cutting ferrule 341 that inserts for prolonging sheet 1.When prolongation sheet 1 cooperates with dilator 3, need to guarantee that the expansion foot 312 on the dilator 3 can strut prolongation sheet 1 when separating, for this reason, dilator 3 and prolongation sheet 1 preferably have positioning relation.After prolonging on the sheet 1 end away from the nail tail and snapping in the cutting ferrule 341 of dilator 3, prolong sheet 1 and determined with the position relationship of dilator 3, guaranteed that to a certain extent prolongation sheet 1 can be servo-actuated and do not break away from expansion foot 312.
Further, in order to strengthen dilator 3 and the positioning relation that prolongs sheet 1, the end of expansion foot 312 can arrange the clip 312a that inserts for prolonging sheet 1, and clip 312a has opening, and as shown in Figure 9, opening 312a is convenient to prolong the insertion of sheet 1.The end of expansion foot 312 is positioned under the skin when performing the operation, and is difficult to observation, and clip 312a guarantees to expand foot 312 can strut prolongation sheet 1.Preferred scheme is that clip 312a and cutting ferrule 341 arrange jointly, clip 312a can fix the lower end that prolongs sheet 1, cutting ferrule 341 can be fixed the upper end that prolongs sheet 1, when then cutting ferrule 341 and clip 312a all arrange, has realized prolonging sheet 1 and more reliable, the stable cooperation of dilator 3.
In addition, can find out from Fig. 8,9 that two expansion feet 312 of dilator 3 are arranged in a crossed manner.Because the folding of dilator 3 expansion 311 can drive 312 foldings of expansion foot, then in fact, upper end and the end of two bodies of rod 31 all intersect.After two expansion feet 312 are arranged in a crossed manner, two expansions 311 near the time, the above parts in two expansion feet, 312 cross points are also close gradually, the following end portion in cross point is separated gradually.This shows, after two expansion feet 312 are arranged in a crossed manner, expansion foot 312 ends are expanded and are strutted when prolonging sheet 1, the width of expansion foot 312 other parts reduces gradually, as shown in figure 11, so, the expansion of expansion foot 312 ends can not cause expanding the expansion of foot 312 other parts, thereby guarantees that further little otch is unaffected.
Can expect, during two expansion feet 312 uncrossed settings of dilator 3, the articulated position 313 between expansion foot 312 and the expansion 311 should roughly be in incision, so, expansion foot 312 is also less on the impact of otch when expansion, thereby satisfies the little otch demand of Minimally Invasive Surgery.
After wearing the end of clubs do, need pressure bar, this embodiment cooperates the prolongation sheet 1 in the various embodiments described above to carry out the pressure bar operation by special pressure bar release link 4, please continue the 12-14 with reference to figure, and Figure 12 is the structural representation of a kind of specific embodiment of pressure bar release link provided by the present invention; Figure 13 is the sketch map in the pressure bar release link pressure bar process among Figure 12; Figure 14 is the structural representation of pressure bar release link pressure bar after complete among Figure 12.
This pressure bar release link 4 comprises depression bar 41 and can limit two prolonging sheets 1 along Handheld Division 42 that the pressure bar direction moves.Depression bar 41 can insert in the Handheld Division 42 and slide in the axial direction in relative Handheld Division 42, and Handheld Division 42 has axially extending bore, and depression bar 41 can insert in this axially extending bore.The both sides of depression bar 41 1 ends are provided with sleeve pipe 412, insert to prolong sheet 1 for two respectively, and sleeve pipe 412 can one machine-shaping with depression bar 41.
During the pressure bar operation, at first two sleeve pipes 412 with depression bar 41 1 ends entangle respectively two prolongation sheets 1, and then depression bar 41 prolongs between the sheets 1 two, the end away from pedicle nail 2 on the two prolongation sheets 1 all are connected with Handheld Division 42 again; The Handheld Division 42 of holding with a firm grip, depression bar 41 relative Handheld Divisions 42 are moved axially, constantly to press to reposition lever 5 places, continue to exert pressure until reposition lever 5 is pressed into the bottom of the U-shaped groove 21 of pedicle nail 2, at this moment, the sleeve pipe 412 direct cutting ferrules of depression bar 41 ends are lived the sidewall of U-shaped groove 21, can fixed sleeving 412 and the sidewall of U-shaped groove 21, such as modes such as rotary clampings, realize rigid constraint, as shown in figure 14, to realize follow-up reattachment surgery operation (strutting/pressurize).
Herein, the effect of Handheld Division 42 of holding with a firm grip is, in the situation that does not affect pedicle nail 2 and spinal column, hold Handheld Division 42 and then keep the state of prolongation sheet 1 and pedicle nail 2 constant, thereby for pressure bar provides support, otherwise the active force of pressure bar can act on pedicle nail 2, and then act on spinal column, spinal column can be damaged and the pressure bar effect can't be reached.As seen, this pressure bar release link 4 cooperates with the above-mentioned flexible sheet 1 that prolongs, thereby has successfully realized the pressure bar operation of reposition lever 5.
Can to make in order realizing holding Handheld Division 42 to prolong sheet 1 and be in steady statue, to prolong that the end away from pedicle nail 2 can arrange the boss 13 that extends laterally on the sheet 1, such as Fig. 1, shown in Figure 15, Figure 15 is the local enlarged diagram at D position among Figure 13.Handheld Division 42 has the side opening 422 that correspondingly snaps in for boss 13, shown in Figure 12-14.When pressure bar release link 4 whole with prolong sheet 1 installation when cooperating, the boss 13 that prolongs sheet 1 can snap in the side opening 422 of Handheld Division 42, and when holding the Handheld Division, boss 13 interferes with side opening 422 hole walls, and then limited prolongation sheet 1 and moved along the pressure bar direction, thereby provide support for pressure bar.
This pressure bar release link 4 cooperates and moves axially with the flexible sheet 1 that prolongs, as can be seen from the figure prolong sheet 1 and adopt slim-lined construction, namely utilize to prolong sheet 1 as guide post, realized simply the pressure bar operation, so that pressure bar release link 4 need not to arrange guide post, simplify the structure; And can make to prolong sheet 1 and return to state before the expansion in sliding process, as shown in figure 14, pressure bar is during to U-shaped groove 21 bottom, and U-shaped groove 21 sidewalls of sleeve pipe 412 overcoats of depression bar 41 are realized the pressure bar operation of rigidity.
Can expect that Handheld Division 42 also can arrange other structures and prolong sheet 1 with restriction and move along the pressure bar direction, such as corresponding screwed hole is set on the two, achieving a fixed connection, or the mode such as bearing pin grafting.Certainly, above-mentioned boss 13, side opening 22 snap fits are more easy.
In order to prevent that reposition lever 5 from rotating or sustain damage in the pressure bar process, the end that depression bar 41 is provided with sleeve pipe 412 can be provided with the inner concave arc surface with reposition lever 5 surface engagement, shown in Figure 13,14.
In addition, the outer wall of depression bar 41 can arrange pawl 411, and Handheld Division 42 is provided with the latch 421 that can snap in adjacent pawl 411 gaps, and shown in Figure 16-17, Figure 16 is the axial cutaway view of pressure bar release link among Figure 12; Figure 17 is the local enlarged diagram at E position among Figure 16.
More than the prolongation sheet of a kind of pedicle nail nail tail provided by the present invention and dilator, pressure bar release link all are described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (14)
1. the prolongation sheet of pedicle nail nail tail, two prolong the afterbody that sheets (1) are relatively arranged on pedicle nail (2), it is characterized in that, and described prolongation sheet (1) be flexible prolongation sheet.
2. prolongation sheet as claimed in claim 1 is characterized in that, an end of described prolongation sheet (1) offers the hole clipping (11) that snaps in for pedicle nail (2) the nail horizontal boss of tail (211); This end of described prolongation sheet (1) also is provided with the flexible card article (12) relative with described hole clipping (1), and described card article (12) forms the snap ring that snaps in to boss (212) for pedicle nail (2) nail tailing axle with the both sides of described prolongation sheet (1).
3. prolongation sheet as claimed in claim 2, it is characterized in that, the both sides that described prolongation sheet (1) is provided with an end of described hole clipping (11) are equipped with bending sidewall (14), and described card article (12) forms described snap ring with two described bending sidewalls (14); The axial boss (212) of described card article (12) and described pedicle nail (2) nail tail, the contact surface of the two is suitable.
4. such as each described prolongation sheet of claim 1-3, it is characterized in that the upper end away from pedicle nail (2) of described prolongation sheet (1) is provided with the boss (13) that extends laterally.
5. one kind is used for expansion such as the dilator of claim 1-4 prolongation sheet as described in each, it is characterized in that described dilator (3) comprises two bodies of rod (31) that are hinged; The every described body of rod (31) comprises expansion head (311) and the expansion foot (312) that joins, and the connecting position of the two is articulated position (313); Two described expansion feet (312) can stretch into two and prolong between the sheets (1), two described expansion head (311) under external force foldings with the end that drives two described expansion feet (312) near or away from; Two described expansion feet (312) terminal away from the time can expand and separate two and prolong the part that sheets (1) are positioned at skin inside.
6. dilator as claimed in claim 5 is characterized in that, has spring (33) between the two described expansion heads (311).
7. dilator as claimed in claim 6 is characterized in that, two described expansion heads (311) all are connected with expansion handle (32).
8. dilator as claimed in claim 7 is characterized in that, also comprises the housing (34) that coats described expansion head (311), described spring (33) and described articulated position (313),
The both sides of described housing (34) are provided with the cutting ferrule (341) that inserts for described prolongation sheet (1).
9. dilator as claimed in claim 5 is characterized in that, the end of described expansion foot (312) has the clip (312a) that inserts for described prolongation sheet (1), and described clip (312a) has opening.
10. such as each described dilator of claim 5-9, it is characterized in that two described expansion feet (312) intersect.
11. pressure bar release link, cooperate compression reposition lever (5) with each described prolongation sheet (1) of claim 1-4, it is characterized in that, described pressure bar release link (4) comprises depression bar (41) and can limit two described prolongation sheets (1) along the Handheld Division (42) that the pressure bar direction moves that described depression bar (41) can insert in the described Handheld Division (42) and slide in the axial direction in relatively described Handheld Division (42); The both sides of described depression bar (41) one ends are equipped with sleeve pipe (412), insert with the nail groove sidewall that supplies respectively two described prolongation sheets (1) and pedicle nail.
12. pressure bar reposition lever as claimed in claim 11, it is characterized in that, the outer wall of described depression bar (41) is provided with pawl (411), and described Handheld Division (42) are provided with the latch (421) that can snap in adjacent described pawl (411) gap.
13. pressure bar reposition lever as claimed in claim 11, it is characterized in that, the both sides of described Handheld Division (42) are equipped with side opening (422), the upper end away from pedicle nail (3) of described prolongation sheet (1) is provided with the boss (13) that extends laterally, and the side opening (422) of described Handheld Division (42) snaps in for described boss (13).
14. pressure bar release link as claimed in claim 11 is characterized in that, the end that described depression bar (41) is provided with sleeve pipe (412) has the inner concave arc surface with reposition lever (5) surface engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210448575.0A CN102920502B (en) | 2012-11-09 | 2012-11-09 | Extension sheets of pedicle screw tail, expander, and tamper reset rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210448575.0A CN102920502B (en) | 2012-11-09 | 2012-11-09 | Extension sheets of pedicle screw tail, expander, and tamper reset rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102920502A true CN102920502A (en) | 2013-02-13 |
| CN102920502B CN102920502B (en) | 2014-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210448575.0A Active CN102920502B (en) | 2012-11-09 | 2012-11-09 | Extension sheets of pedicle screw tail, expander, and tamper reset rod |
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| CN (1) | CN102920502B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104434292A (en) * | 2014-12-24 | 2015-03-25 | 山东威高骨科材料股份有限公司 | Minimally invasive percutaneous pedicle screw with detachable tail length adjusting arms |
| WO2016000229A1 (en) * | 2014-07-02 | 2016-01-07 | Yue Zhou | Extension piece at nail end of pedicle nail, dilator and push rod reset lever |
| CN105832393A (en) * | 2016-02-25 | 2016-08-10 | 鞠亮 | Screw stopper used for clinical operation |
| CN106473783A (en) * | 2016-11-22 | 2017-03-08 | 常州华森医疗器械有限公司 | Pedicle of vertebral arch fixed system is with strutting piece |
| CN106510834A (en) * | 2016-11-22 | 2017-03-22 | 常州华森医疗器械有限公司 | Installation tool for pedicle fixation system |
| CN108294818A (en) * | 2018-02-07 | 2018-07-20 | 北京理贝尔生物工程研究所有限公司 | A kind of minimally invasive solid pedicle screw |
| CN113208716A (en) * | 2020-01-21 | 2021-08-06 | 上海三友医疗器械股份有限公司 | Structure for connecting pedicle screw and extension piece |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016000229A1 (en) * | 2014-07-02 | 2016-01-07 | Yue Zhou | Extension piece at nail end of pedicle nail, dilator and push rod reset lever |
| CN104434292A (en) * | 2014-12-24 | 2015-03-25 | 山东威高骨科材料股份有限公司 | Minimally invasive percutaneous pedicle screw with detachable tail length adjusting arms |
| CN105832393A (en) * | 2016-02-25 | 2016-08-10 | 鞠亮 | Screw stopper used for clinical operation |
| CN106473783A (en) * | 2016-11-22 | 2017-03-08 | 常州华森医疗器械有限公司 | Pedicle of vertebral arch fixed system is with strutting piece |
| CN106510834A (en) * | 2016-11-22 | 2017-03-22 | 常州华森医疗器械有限公司 | Installation tool for pedicle fixation system |
| CN108294818A (en) * | 2018-02-07 | 2018-07-20 | 北京理贝尔生物工程研究所有限公司 | A kind of minimally invasive solid pedicle screw |
| CN113208716A (en) * | 2020-01-21 | 2021-08-06 | 上海三友医疗器械股份有限公司 | Structure for connecting pedicle screw and extension piece |
| CN113384336A (en) * | 2021-05-25 | 2021-09-14 | 上海三友医疗器械股份有限公司 | Pedicle screw extension assembly and method of use |
| CN113384336B (en) * | 2021-05-25 | 2023-01-13 | 上海三友医疗器械股份有限公司 | Pedicle screw extension assembly and method of use |
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Address after: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee after: Shanghai Sanyou medical equipment Limited by Share Ltd Address before: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee before: Shanghai Sanyou Medical Devices Co., Ltd. |