CN111568527A - Pedicle screw feeder - Google Patents

Abstract

The invention relates to a pedicle screw feeder, which has the technical scheme that: the device comprises a driving sleeve, wherein one end of the driving sleeve is coaxially provided with a connecting pipe body, and the connecting pipe body is communicated with the inside of the driving sleeve; the driving sleeve is internally and coaxially provided with an inner core needle for positioning, a needle body fixer for positioning the end part of the inner core needle is also arranged, and the driving sleeve is also provided with a driving component for driving the needle body fixer to move along the axial direction of the driving sleeve to control the displacement of the inner core needle; the end part of the connecting pipe body is detachably connected with a screw, the screw and the connecting pipe body are coaxially arranged, and a through hole for accommodating the inner core needle to penetrate out is formed in the screw along the axis of the screw. The invention has the advantages that: the pedicle screw feeder has the advantages that the pedicle screw feeder has the functions of positioning and feeding screws, the multiple transmission of tools in the operation process is reduced, and the use efficiency of the pedicle screw feeder is improved.

Description

Pedicle screw feeder

Technical Field

The invention relates to the field of medical instruments, in particular to a pedicle screw feeder.

Background

The use of spinal fixation techniques has been in existence for decades. At present, spinal internal fixation devices are mostly adopted to fix unstable vertebral bodies after spinal trauma, spondylolisthesis, degenerative diseases and other single-segment or multi-segment fractures. The types of the fixator in the market are more, but most of the fixators consist of other corresponding components such as unidirectional pedicle screws, universal pedicle screws, connecting rods and the like.

Chinese patent publication No. CN104688326A discloses a pedicle screw feeder, which comprises a screw feeding rod, a screw feeding sleeve, a direction sheath, a screwing nut, an anti-withdrawal knob, a locking snap button, and a spring. The head of the upper screw rod is provided with a connector connected with the pedicle screw, the upper screw rod is respectively designed into a T shape and a straight shape according to the connection with the one-way pedicle screw and the universal pedicle screw, the middle of the upper screw rod is provided with a positive 8-direction screw matched with the locking snap button, the anti-withdrawal knob can be directly pushed forwards at any angle in use to lock the pedicle screw, and the tail of the upper screw rod is provided with a quick-change connector which can be connected with a T-shaped quick-change handle or a straight quick-change handle according to the needs. When the pedicle screw screwing device is used by a worker, a universal pedicle screw or a single pedicle screw can be connected to the connector, then the direction sheath is held by the hand, and the universal pedicle screw or the single pedicle screw at the head is driven to rotate through the rotation of the T-line quick-change handle or the straight-line quick-change handle, so that the screw is screwed in.

However, in actual operation, before using the pedicle screw nailing device, the staff still needs to drill and position the actual fixed position of the screw through the guide pin or spinal biopsy so as to stably screw in the screw.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the pedicle screw feeder, which has the advantages that the pedicle screw feeder has the functions of positioning and feeding screws, and the multiple transmission of tools in the operation process is reduced, so that the use efficiency of the pedicle screw feeder is improved.

The technical purpose of the invention is realized by the following technical scheme: a pedicle screw feeder comprises a driving sleeve, wherein one end of the driving sleeve is coaxially provided with a connecting pipe body, and the connecting pipe body is communicated with the inside of the driving sleeve; the driving sleeve is internally and coaxially provided with an inner core needle for positioning, a needle body fixer for positioning the end part of the inner core needle is also arranged, and the driving sleeve is also provided with a driving component for driving the needle body fixer to move along the axial direction of the driving sleeve to control the displacement of the inner core needle; the end part of the connecting pipe body is detachably connected with a screw, the screw and the connecting pipe body are coaxially arranged, and a through hole for accommodating the inner core needle to penetrate out is formed in the screw along the axis of the screw.

Through adopting above-mentioned technical scheme, the staff is at first with the fix with screw at the tip of connecting the body, then remove in the driving sleeve through drive assembly control needle body fixer, and make the through-hole salient in the tip of screw of inner core needle passing the screw, then fix a position the affected part of pedicle of vertebral arch with the inner core nail, strike through the hammer and make the inner core needle nail go into in the cortex bone of pedicle of vertebral arch, the extension length of inner core nail is adjusted once more in cooperation through drive assembly after that, strike of rethread hammer, make the inner core needle strike into in the cancellous bone of pedicle of vertebral arch, thereby the location of inner core nail has been realized, the screw in angle of screw has been confirmed. Finally, the worker rotates the driving sleeve and then works in cooperation with the driving assembly, so that the screw is screwed into the vertebral pedicle under the limiting effect of the inner core nail, and meanwhile, the driving assembly drives the inner core needle to return to the inside of the connecting pipe body. In the whole process, the positioning of the screw and the screwing in of the screw are only completed through the pedicle screw feeder independently, and the doctor can realize the positioning and the fixing of the screw only through the matching of the pedicle screw feeder and the hammer, so that the repeated transmission of surgical tools is reduced, and the operation efficiency is improved.

The present invention in a preferred example may be further configured to: the one end rigid coupling of interior core needle has a stopper, set up a holding tank that holds interior core needle along the axial of the fixed body of needle body on the outer arm of needle body fixer to set up the spacing recess of a plurality of along the length direction of holding tank on the outer wall of needle body fixer, spacing recess communicates with the holding tank each other, and plays limiting displacement to the stopper.

Through adopting above-mentioned technical scheme, seting up of holding tank has played to holding limiting displacement to the inner core needle, has ensured that the inner core needle is placed along the axial direction of nail body fixer, and the biggest extension length of being convenient for staff adjustment inner core needle of seting up of a plurality of spacing recesses to different operation demands have improved the suitability of product.

The present invention in a preferred example may be further configured to: the driving component comprises a connecting sleeve for placing the needle body fixer, one end of the connecting sleeve is provided with a through hole for the inner core needle to pass through, an internal thread is arranged in the connecting sleeve, and the outer peripheral surface of the needle body fixer is provided with an external thread matched with the connecting sleeve in a threaded manner; the outer peripheral face of the driving sleeve is coaxially and rotatably connected with a rotating handle, an inner thread is formed in the inner wall of the rotating handle, a plurality of limiting sliding grooves are formed in the outer wall of the driving sleeve in the axial direction of the driving sleeve, the peripheral face of the connecting sleeve is fixedly connected with limiting sliding blocks in positions corresponding to the limiting sliding grooves, and external threads matched with the rotating handle in a threaded mode are formed in the outer wall of the limiting sliding blocks.

Through adopting above-mentioned technical scheme, threaded connection through needle body fixer and connecting sleeve has realized the interconnect of connecting sleeve and needle body fixer, then when rotatory handle rotates, through rotatory handle and limit slider's screw-thread fit, make limit slider along the axial direction displacement of drive sleeve under the restriction of spacing spout, and then drive inner core needle along drive sleeve's axial displacement in drive sleeve, inside the exquisite primary structure of drive assembly structure is located drive sleeve, occupation space is few, the simple operation.

The present invention in a preferred example may be further configured to: the screw comprises a screw tip, a pressure pad arranged at the tail of the screw tip and used for limiting the rotation of the screw tip, and a limit sleeve used for accommodating and clamping the screw tip and the pressure pad, wherein an internal thread is arranged on the inner peripheral surface of the limit sleeve, the internal thread of the limit sleeve is connected with a screw plug used for pressing and connecting medical tools of adjacent screws, a plurality of extension arc plates used for detachably connecting with the connecting pipe body are fixedly connected to the end surface of the limit sleeve, and through holes are respectively arranged on the screw plug, the pressure pad and the screw tip.

Through adopting above-mentioned technical scheme, when the staff assembled the screw, at first put into spacing sleeve with nail point and pressure pad in proper order to make spacing sleeve play spacing fixed effect to nail point and pressure pad, then the staff can place the medical instrument that is used for connecting adjacent screw in spacing sleeve, and the screw through the plug screw revolves soon, fixes medical instrument in spacing sleeve, and the extension arc board has played the effect of connecting fixedly, has improved ann and has torn efficiency open.

The present invention in a preferred example may be further configured to: the outer peripheral surface of the connecting pipe body is rotatably connected with a knob, the knob and the connecting pipe body rotate coaxially, a gap is reserved between the knob and the outer peripheral surface of the connecting pipe body, an inner thread is formed in the inner wall of the knob, and an outer thread matched with the knob in a threaded mode is formed in the outer arc surface of the extension arc plate.

By adopting the technical scheme, the extension arc plate is in threaded connection with the inner wall of the knob, so that the connection efficiency of the extension arc plate and the knob is improved, the efficiency of fixing the screw at the end part of the connecting pipe body is improved, the connection relation between the screw and the knob is simple, the operation is convenient and fast, and the operation efficiency is improved.

The present invention in a preferred example may be further configured to: the outer peripheral face of the needle body fixer coaxially rotates to be connected with a needle body limiting pipe, and one side of the needle body limiting pipe is provided with a yielding groove for accommodating the inner core needle to pass through along the axial direction of the needle body limiting pipe.

Through adopting above-mentioned technical scheme, the staff at first rotates the spacing pipe of needle body, makes the groove of stepping down of the spacing pipe of needle body and the holding tank of nail body fixer communicate each other, then puts into the holding tank with the inner core needle, through the rotation of the spacing pipe of needle body, makes the holding tank and the groove of stepping down misplace each other after that for the spacing pipe of needle body has the effect of gear to the inner core needle, has restricted breaking away from of inner core needle and needle body fixer.

The present invention in a preferred example may be further configured to: the outer peripheral surface of the needle body fixer is provided with an annular limiting groove, and the needle body limiting pipe is arranged in the limiting groove and is rotationally connected with the needle body fixer.

Through adopting above-mentioned technical scheme, the axis of needle body fixer is pressed close to more to the inner wall that makes the spacing pipe of needle body of seting up of spacing groove, has reduced the range of rocking of inner core needle, has improved the stability that the inner core nail was placed.

The present invention in a preferred example may be further configured to: one end of the driving module, which deviates from the connecting pipe body, is detachably connected with a module handle used for controlling the rotation of the driving sleeve.

Through adopting above-mentioned technical scheme, the setting of module handle provides the region of gripping of hand, and the staff of being convenient for has improved the convenience of operation to revolving of drive sleeve.

The present invention in a preferred example may be further configured to: annular screens groove has been seted up to the outer peripheral face of connecting the body, the jack that a plurality of and screens groove intercommunication each other is seted up to the outer peripheral face of knob, all inserts in every jack and is equipped with a gag lever post, and the tip of gag lever post is located the screens inslot.

Through adopting above-mentioned technical scheme, when the staff assembled knob and connecting tube body each other, establish the knob cover on connecting tube body, then removed the knob to the position that jack and screens groove correspond, establish through inserting of a plurality of gag lever post for the tip of gag lever post is located the screens inslot, thereby has restricted breaking away from of knob and connecting tube body, thereby connecting pipe and screens inslot wall area of contact are limited, thereby has ensured knob pivoted flexibility.

In conclusion, the invention has the following beneficial effects:

firstly, frequent tool transfer in the operation is reduced. The improved pedicle screw feeder has the advantages that the inner core needle for positioning is arranged in the driving sleeve, and then the structure of the screw is improved, so that the inner core needle does not conflict with the screw during working, the screw can be screwed in after the inner core needle is aligned, the pedicle screw feeder has the functions of positioning and feeding, and the operation efficiency is improved;

the stability when installing is improved, the setting of the spacing pipe of needle body has played spacing effect to inner core nail and needle body fixer, has ensured the stability in inner core nail and the drive assembly installation.

Drawings

FIG. 1 is a schematic view of the overall structure of a pedicle screw driver;

FIG. 2 is a schematic view showing a connection structure of the driving sleeve and the connecting pipe body;

FIG. 3 is a schematic view showing the structure of a needle body fastener;

FIG. 4 is an exploded view of an embodiment of a drive assembly;

FIG. 5 is a schematic view showing a connection structure of a module handle and a driving sleeve;

fig. 6 is a schematic view showing a needle fixing mechanism;

FIG. 7 is an enlarged view taken at detail A of FIG. 6 and showing the mating relationship of the knob and the connecting tube body;

FIG. 8 is a schematic view showing the structure of the screw;

fig. 9 is a cross-sectional view of the screw after the elongated arc plate has been broken.

In the figure, 1, a drive sleeve; 11. connecting the pipe body; 111. a position clamping ring; 112. a clamping groove; 113. a matching block; 12. a module handle; 121. hexagonal holes; 122. a clamping block; 13. a base; 14. mounting holes; 15. a threaded hole; 16. screwing the bolt; 17. an inner core needle; 171. a limiting block; 18. a second ring block; 19. a limiting chute; 2. a needle body holder; 21. a screwing part; 22. a threaded portion; 23. a needle body fixing part; 24. a limiting part; 25. accommodating grooves; 26. a limiting groove; 27. a limiting groove; 28. a needle body limiting tube; 29. a yielding groove; 3. a drive assembly; 31. a connecting sleeve; 311. perforating; 32. a limiting slide block; 33. rotating the handle; 41. a knob; 411. a jack; 412. a limiting rod; 5. A screw; 51. nailing tips; 52. a pressure pad; 521. a mating groove; 522. caulking grooves; 53. a limiting sleeve; 531. a hole of abdication; 532. a slot; 54. extending the arc plate; 55. a plug screw; 56. a through hole; 61. an extension tube; 62. a hexagonal tube; 621. a slot hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides a pedicle of vertebral arch goes up nail ware, as shown in figure 1, including drive sleeve 1 (here as shown in figure 2), the one end ofdrive sleeve 1 can be dismantled and is connected with a connectingtube body 11, the other end ofdrive sleeve 1 can be dismantled and is connected with amodule handle 12, be provided with aninner core needle 17 in thedrive sleeve 1 and carry out the needle body fixer 2 (here as shown in figure 3) fixed toinner core needle 17 tip, still be provided with the drive assembly 3 that drivesneedle body fixer 2 and remove alongdrive sleeve 1 axial direction in thedrive sleeve 1, the head of connectingtube body 11 can be dismantled and is connected with ascrew 5.

As shown in fig. 2, the bottom of the drivingsleeve 1 is an opening, abase 13 is coaxially and fixedly connected to the end of the connectingpipe body 11 facing the drivingsleeve 1, when the drivingsleeve 1 and the connectingpipe body 11 are installed to each other, thebase 13 can be sleeved at the lower end of the drivingsleeve 1, two threadedholes 15 communicated with the inner wall of the base 13 are symmetrically formed in the outer peripheral surface of thebase 13, a screwedbolt 16 is connected to each threadedhole 15 through ascrew bolt 16 and a threadedhole 15, so that the end of the screwedbolt 16 is in contact with the outer peripheral surface of the drivingsleeve 1, friction between the connectingpipe body 11 and the outer arm of the drivingsleeve 1 is increased, and stable connection between the connectingpipe body 11 and the drivingsleeve 1 is achieved.

As shown in fig. 3, theneedle holder 2 is cylindrical, and ascrew part 21, ascrew part 22, aneedle fixing part 23, and astopper part 24 are sequentially provided from one end to the other end of theneedle holder 2. Theneedle body holder 2 is provided with anaccommodating groove 25 at the position where the needlebody fixing part 23 and the limitingpart 24 are located, theaccommodating groove 25 is arranged along the axial direction of theneedle body holder 2, and theaccommodating groove 25 is formed in the central direction of theneedle body holder 2 from the outer peripheral surface of theneedle body holder 2. A plurality of limitinggrooves 26 are further formed in the outer peripheral surface of theneedle body fixer 2, the limitinggrooves 26 are communicated with theaccommodating grooves 25 and are perpendicular to each other, and the adjacent limitinggrooves 26 are arranged at equal intervals.

As shown in fig. 3, acircular stopper 171 is fixed to the end of thestylet 17. Wheninner core needle 17 andneedle body fixer 2 are mutually installed, can go intoneedle body fixer 2 inside withinner core needle 17 card through holdingtank 25 card, and makeinner core needle 17 andneedle body fixer 2 coaxial each other, and thestopper 171 ofinner core needle 17 tip is located spacingrecess 26, thereby restrictedinner core needle 17 to remove along 2 axial direction of needle body fixer, and the setting of a plurality of spacingrecess 26, the accessible is placedstopper 171 and is adjustedinner core needle 17 and 2 relative positions of needle body fixer in thespacing recess 26 of difference, and then the final limit length who connects the 11 tip of body of outstanding connection ofinner core needle 17, with the different operation demands of adaptation.

As shown in fig. 3, an annular limitinggroove 27 is formed on the outer peripheral surface of theneedle holder 2, the limitinggroove 27 is located in the limitingportion 24 of theneedle holder 2, aneedle limiting tube 28 is arranged in the limitinggroove 27, the inner wall diameter of theneedle limiting tube 28 is equal to the inner annular surface diameter of the limitinggroove 27, an abdicatinggroove 29 is formed on the outer peripheral surface of theneedle limiting tube 28 along the axis of theneedle limiting tube 28, and the abdicatinggroove 29 has the same width as theaccommodating groove 25. When the staff fixesinner core needle 17 onneedle body fixer 2, can rotate thespacing pipe 28 of needle body earlier, make the groove of stepping down 29 and the mutual intercommunication of 2holding tank 25 positions of needle body fixer of thespacing pipe 28 of needle body, then put intoinner core needle 17 and advance in theholding tank 25, rotate thespacing pipe 28 of needle body afterwards, make groove of stepping down 29 and holdingtank 25 position crisscross each other, thereby the separation from ofinner core needle 17 withneedle body fixer 2 has been restricted, be convenient for with the removal and the installation of the needle body fixing body, and when stepping downgroove 29 and holdingtank 25 misplaced each other, the inner wall of thespacing pipe 28 of needle body pastes the outer wall ofinner core needle 17 more, thereby the home range ofinner core needle 17 has been restricted, the stability thatinner core needle 17 placed has been improved.

As shown in fig. 4, asecond ring block 18 is coaxially and fixedly connected to the outer peripheral surface of the drivingsleeve 1, a gap is left between thesecond ring block 18 and thebase 13, two limiting slidinggrooves 19 are formed in the outer peripheral surface of the drivingsleeve 1, and the limiting slidinggrooves 19 are formed in the axial direction of the drivingsleeve 1 and penetrate the drivingsleeve 1 towards the port of the connectingpipe 11.

As shown in fig. 4, the above-mentioned driving assembly 3 comprises a connectingsleeve 31 for fixing theneedle holder 2, the diameter of the inner wall of the connectingsleeve 31 is equal to the diameter of the outer wall of theneedle holder 2, and the inner wall of the opening of the connectingsleeve 31 is provided with an internal thread which is in threaded engagement with the threadedportion 22 of theneedle holder 2; the end face of the connectingsleeve 31 facing away from the opening is provided with a throughhole 311 for receiving theinner core needle 17 to pass through. The practitioner can secure theneedle holder 2 within thehub 31 and pass theinner core needle 17 through thebore 311. The connectingsleeve 31 is coaxially arranged in the drivingsleeve 1 and is connected with the drivingsleeve 1 in a sliding manner along the axial direction of the drivingsleeve 1; two limiting slide blocks 32 are fixedly connected to the outer peripheral surface of the connectingsleeve 31, the limiting slide blocks 32 are located in the corresponding limitingslide grooves 19, and the width of the limiting slide blocks 32 is equal to that of the limitingslide grooves 19, so that relative rotation between the connectingsleeve 31 and the drivingsleeve 1 is limited; arotating handle 33 is further arranged between the base 13 and thesecond ring block 18, therotating handle 33 is tubular and rotates coaxially with the drivingsleeve 1, the diameter of the inner wall of therotating handle 33 is equal to that of the outer wall of the drivingsleeve 1, an inner thread is arranged on the inner wall of therotating handle 33, and an outer thread matched with therotating handle 33 in a threaded manner is arranged on the outer wall, which is attached to therotating handle 33, of the two driving sliders.

When an operator operates theinner core needle 17, one hand controls thesecond ring block 18, the other hand rotates therotating handle 33, therotating handle 33 is in threaded fit with the limitingslide block 32, and the limitingslide block 32 is in limiting fit with the limitingslide groove 19 to drive the connectingsleeve 31 to slide in the drivingsleeve 1 along the axial direction of the drivingsleeve 1, so that theinner core needle 17 extends out of the end of the connectingpipe body 11, and subsequent positioning work is facilitated.

As shown in fig. 5, in order to improve the convenience of the worker for pedicle use. The coaxial rigid coupling of the one end that drivingsleeve 1 deviates from connectingtube body 11 has anextension pipe 61, the coaxial rigid coupling of the end ofextension pipe 61 has ahexagonal pipe 62, above-mentioned module handle 12 center department offer one with hexagonal pipe complexhexagonal hole 121, thereby peg graft each other withhexagonal pipe 62 throughmodule handle 12, make module handle 12 install the afterbody at pedicle of vertebral arch nail ware, and also restricted module handle 12 andhexagonal pipe 62 relative rotation, when making hand grip module handle 12, the stability of drivingsleeve 1 has been ensured.

As shown in fig. 5, two hemispherical fixture blocks 122 are fixedly connected to the inner wall of thehexagonal hole 121 of themodule handle 12, and aslot 621 for accommodating thefixture block 122 is formed in the outer wall of thehexagonal tube 62 and corresponds to thefixture block 122, so that thefixture block 122 and theslot 621 are matched with each other, thereby improving the stability of the insertion connection between the module handle 12 and thehexagonal tube 62.

As shown in fig. 6 and 7, aclamping ring 111 is fixedly connected to the outer peripheral surface of the connectingtube 11, aknob 41 is further sleeved on the outer peripheral surface of the connectingtube 11, the diameter of the inner wall of theknob 41 is equal to the diameter of the outer wall of theclamping ring 111, so that a gap between theknob 41 and the outer wall of the connectingtube 11 is ensured, anannular clamping groove 112 is formed in the outer peripheral surface of the connectingtube 11, the clampinggroove 112 is located on one side of theclamping ring 111, a plurality ofinsertion holes 411 are formed in positions of theknob 41 corresponding to the clampinggroove 112, the insertion holes 411 are uniformly distributed along the circumferential direction of theknob 41, a limitingrod 412 is inserted into eachinsertion hole 411, and the end of each limitingrod 412 is located in the clampinggroove 112, so that the axial sliding of theknob 41 along the connectingtube 11 is limited, and the coaxial rotation of the.

As shown in fig. 8, thescrew 5 includes atip 51, apressure pad 52, aplug 55, alimit sleeve 53, and anextension arc plate 54.Nail point 51,pressure pad 52, through-hole 56 that holds thecore needle 17 and wear out has all been seted up on theplug screw 55, the internal thread has been seted up onlimit sleeve 53's the inner wall,extension arc plate 54 is provided with two, and the rigid coupling is onlimit sleeve 53 open-ended border, twoextension arc plate 54 intervals set up and lay alonglimit sleeve 53's axial, the inner wall radian of twoextension arc plates 54 and the outer peripheral face profile of connectingtube body 11 mutually support, everyextension arc plate 54 deviates fromlimit sleeve 53 tip outer peripheral face and has seted up the external screw thread, and set up on the inner wall of above-mentionedknob 41 withextension arc plate 54 screw-thread fit's internal thread, thereby twoextension arc plates 54 of accessible andknob 41's screw-thread fit, realizescrew 5 andknob 41's reciprocal anchorage. The other end of the limitingsleeve 53 is provided with a yieldinghole 531 for the tip of thenail tip 51 to penetrate through. When the worker assembles thescrew 5, thenail tip 51 and thepressure pad 52 can be sequentially placed into the limitingsleeve 53 from between the twoextension arc plates 54, the lower surface of thepressure pad 52 is provided with a matchinggroove 521 for accommodating the end part of thenail tip 51, and thenail tip 51 and thepressure pad 52 are mutually inserted to limit the relative rotation of thenail tip 51 and thepressure pad 52. After thenail tip 51 and thepressure pad 52 are simultaneously positioned in the limitingsleeve 53, the worker presses through the machine, so that the limitingsleeve 53 tightly clamps thenail tip 51 and thepressure pad 52 in the limitingsleeve 53.

As shown in fig. 8 and 9, two arc-shapedslots 532 are formed in the outer peripheral surface of the limitingsleeve 53, the twoslots 532 are communicated with the inner wall of the limitingsleeve 53, and one side of thepressure pad 52 away from thenail tip 51 is provided with twocaulking grooves 522 communicated with the twoslots 532. In the operation process, a worker needs to insert a medical device needing to be connected with twoadjacent screws 5 into theslot 532, the worker can insert the medical device into the limitingsleeve 53 through theslot 532, then place thescrew plug 55 at the port of the limitingsleeve 53, the end part of the connectingtube 11 is fixedly connected with a matching block 113 (shown in fig. 2) used for screwing thescrew plug 55, thescrew plug 55 is driven to rotate through the rotation of the connectingtube 11, so that thescrew plug 55 tightly abuts against the movable connecting device, the medical connecting device tightly abuts against the inner wall of thecaulking groove 522, and when thenail tip 51 and the pedicle of vertebral arch are fixed, thescrew plug 55 does not need to be placed into the limitingsleeve 53.

When a worker uses the pedicle screw driver, theinner core needle 17 is firstly embedded in theaccommodating groove 25 of theneedle body holder 2, then the limitingblock 171 at the end of theinner core needle 17 is clamped in the limitinggroove 26 of theneedle body holder 2, then the needlebody limiting tube 28 is rotated, so that theinner core needle 17 and theneedle body holder 2 keep a coaxial state, then theneedle body holder 2 is inserted into the connectingsleeve 31, and theneedle body holder 2 and the connectingsleeve 31 are fixed with each other by screwing the screwingpart 21 of the screwingpart 2 of theneedle body holder 2. Then, the worker inserts the connectingsleeve 31 into the drivingsleeve 1 from the lower end of the drivingsleeve 1, and positions the limit slide blocks 32 in the correspondinglimit slide grooves 19, and then sleeves therotary handle 33 on the outer circumferential surface of the drivingsleeve 1, fixes the base 13 at the bottom of the driving sleeve through the screwingbolt 16, fixes thenail tip 51 and thepressure pad 52 in thelimit sleeve 53, and connects thescrew 5 with the connectingtube 11 through the threaded fit of theextension arc plate 54 and theknob 41. Then the worker holds the module handle 12 with one hand and rotates the rotating handle 33 with the other hand, so that the inner core needle 17 is driven to extend out of the port of the connecting pipe body 11 through the thread matching of the limiting slide block 32 and the rotating handle 33, the length of the end part of the inner core needle 17 extending out of the screw 5 is adjusted, the inner core needle 17 protrudes out of the end part of the screw 5 by 3mm, then the worker supports the tip end of the inner core needle 17 at the fixed position of the vertebral pedicle, the tail part of the vertebral pedicle is knocked through a hammer, the inner core needle 17 is knocked into the cortical bone of the vertebral pedicle, then the worker holds the module handle 12 with one hand and rotates the rotating handle 33 with the other hand, the distance of the end part of the screw 5 is adjusted again, the tail part of the pedicle nailing device is knocked through the hammer again, the inner core needle 17 is knocked into the cancellous bone of the vertebral pedicle, and the head part of the, then, the worker holds the module handle 12 with one hand to screw the driving sleeve 1, the other hand holds the column rotating handle 33 with the other hand to keep still, when the driving sleeve 1 is rotated, as the screw 5 and the knob 41 are fixed with each other, the nail tip 51 is screwed into the vertebral pedicle under the guidance of the inner core needle 17, and the inner core needle 17 is also driven by the threaded matching of the limiting slide block 32 and the rotating handle 33 to drive the inner core needle 17 to displace towards the direction of the driving sleeve 1, so that the inner core needle 17 is also returned to the inside of the pedicle screw driver while the nail tip 51 is screwed into the vertebral pedicle. Then, the worker disconnects theextension arc plate 54 from theknob 41 by screwing theextension arc plate 54 to theknob 41, and finally breaks theextension arc plate 54 from the connection with the limiting sleeve 53 (as shown in fig. 8), at this time, the worker can insert the medical instrument connected to theadjacent screw 5 into theslot 532 of the limitingsleeve 53, and finally fix the medical instrument by screwing theplug screw 55. In the process, theinner core needle 17 and thescrew 5 are always positioned on the pedicle screw feeder, so that the positioning and the fixing of thescrew 5 can be realized only by independently operating the pedicle screw feeder by a worker, the operation is simple, the multiple transmission of tools in the operation process is reduced, and the operation efficiency is improved.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (9)

1. A pedicle screw feeder is characterized in that: the device comprises a driving sleeve (1), wherein one end of the driving sleeve (1) is coaxially provided with a connecting pipe body (11), and the connecting pipe body (11) is communicated with the inside of the driving sleeve (1); an inner core needle (17) for positioning is coaxially arranged in the driving sleeve (1), a needle body fixer (2) for positioning the end part of the inner core needle (17) is also arranged, and a driving component (3) for driving the needle body fixer (2) to move along the axial direction of the driving sleeve (1) to control the displacement of the inner core needle (17) is also arranged on the driving sleeve (1); the end part of the connecting pipe body (11) is detachably connected with a screw (5), the screw (5) and the connecting pipe body (11) are coaxially arranged, and the screw (5) is provided with a through hole (56) for accommodating the penetration of the inner core needle (17) along the axis of the screw (5).

2. A pedicle screw feeder according to claim 1, wherein: the one end rigid coupling of interior core needle (53) has a stopper (171), set up an holding tank (25) that holds interior core needle (17) along the axial of the fixed body of needle body on needle body fixer (2) outer arm to set up a plurality of spacing recess (26) along the length direction of holding tank (25) on the outer wall of needle body fixer (2), spacing recess (26) and holding tank (25) communicate each other, and play limiting displacement to stopper (171).

3. A pedicle screw feeder according to claim 1, wherein: the driving component (3) comprises a connecting sleeve (31) for placing the needle body fixer (2), one end of the connecting sleeve (31) is provided with a through hole (311) for the inner core needle (17) to pass through, an internal thread is arranged in the connecting sleeve (31), and the outer peripheral surface of the needle body fixer (2) is provided with an external thread in threaded fit with the connecting sleeve (31); the coaxial rotation of outer peripheral face of driving sleeve (1) is connected with a rotatory handle (33), and the internal thread has been seted up to the inner wall of rotatory handle (33), a plurality of spacing spout (19) have been seted up along the axial of driving sleeve (1) on the outer wall of driving sleeve (1), the position rigid coupling that global and spacing spout (19) of connecting sleeve (31) correspond has spacing slider (32), offers on the outer wall of spacing slider (32) with rotatory handle (33) screw-thread fit's external screw thread.

4. A pedicle screw feeder according to claim 1, wherein: the screw (5) include nail point (51), set up at nail point (51) afterbody and restriction top pivoted pressure pad (52), hold and block spacing sleeve (53) of establishing nail point (51) and pressure pad (52), the internal peripheral surface of spacing sleeve (53) is seted up there is the internal thread, spacing sleeve (53) female connection has one to be used for pressing plug screw (55) of establishing the medical instrument of connecting adjacent screw (5), the rigid coupling has a plurality of extension arc board (54) that are used for and connect body (11) detachable connection on the terminal surface of spacing sleeve (53), through-hole (56) are seted up respectively on plug screw (55), pressure pad (52), nail point (51).

5. A pedicle screw feeder according to claim 4, wherein: the connecting pipe body (11) outer peripheral face is rotated and is connected with a knob (41), and knob (41) and connecting pipe body (11) coaxial rotation leave the space between knob (41) and the connecting pipe body (11) outer peripheral face to the internal thread has been seted up to knob (41) inner wall, the outer cambered surface of extension arc board (54) is seted up with knob (41) screw-thread fit's external screw thread.

6. A pedicle screw feeder according to claim 2, wherein: the peripheral surface of the needle body fixer (2) is coaxially and rotatably connected with a needle body limiting pipe (28), and one side of the needle body limiting pipe (28) is provided with a yielding groove (29) for accommodating the inner core needle (17) to pass through along the axial direction of the needle body limiting pipe (28).

7. A pedicle screw feeder according to claim 6, wherein: an annular limiting groove (27) is formed in the peripheral surface of the needle body fixer (2), and the needle body limiting pipe (28) is arranged in the limiting groove (27) and is rotatably connected with the needle body fixer (2).

8. A pedicle screw feeder according to claim 1, wherein: one end of the driving module, which deviates from the connecting pipe body (11), is detachably connected with a module handle (12) which is used for controlling the driving sleeve (1) to rotate.

9. A pedicle screw feeder according to claim 4, wherein: annular screens groove (112) have been seted up to the outer peripheral face of connecting tube body (11), a plurality of jack (411) that communicate each other with screens groove (112) have been seted up to the outer peripheral face of knob (41), all insert in every jack (411) and be equipped with a gag lever post (412), and the tip of gag lever post (412) is located screens groove (112).

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