CN211213445U

CN211213445U - Skull fixing device

Info

Publication number: CN211213445U
Application number: CN201921587535.8U
Authority: CN
Inventors: 朱文昱; 王为华; 闫可; 陆黎春
Original assignee: Suzhou Science and Technology Town Hospital
Current assignee: Suzhou Science and Technology Town Hospital
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-08-11
Anticipated expiration: 2029-09-23

Abstract

The utility model provides a skull fixing device, which comprises a first lock head and a second lock head, wherein the first end surface of the first lock head is provided with a first extending part protruding the end surface of the first lock head, the end surface of the second lock head facing the first extending part is provided with a second extending part protruding the end surface of the second lock head, the first extending part and the second extending part are formed into a hollow shape, the first extending part is telescopically arranged in the inner cavity of the second extending part, the side wall of the first extending part is provided with a first through hole and a first thread, the side wall of the second extending part is correspondingly provided with a second through hole and a second thread, the first through hole and the second through hole are communicated when the first extending part is completely extended into the inner cavity of the second extending part, a channel communicated with the inner cavities of the first extending part and the second extending part is formed, so that magnesium alloy in the inner cavity of the second extending part releases and induces osteogenesis factor magnesium ions to diffuse to surrounding, the recovery speed is accelerated; and the first lock head and the second lock head are fastened and fixed through the first thread and the second thread.

Description

Skull fixing device

Technical Field

The utility model belongs to the technical field of medical equipment, concretely relates to skull fixing device.

Background

The skull flap is often required to be restored after a craniotomy, and is often required to be fixed using a skull fixation device such as a skull lock.

Prior skull fixation devices, such as US20110028973A1, disclose a skull fixation system that includes two heads slidably connected to telescoping extensions and a spring member that holds the two heads in discrete positions by a locking mechanism until the skull is ready for implantation. Once implanted, the locking mechanism is disengaged, allowing the heads to be compressed toward each other by the spring and the skull flap to be clamped close to the skull. The skull fixing device adopting the technical scheme has the following problems: the skull flap is restored by clamping and fixing the skull flap through the two heads, but the physical fixing mode has the defects that the time for restoring the flap is long, and the bone growth of the skull and the skull flap can be completed in a long time to restore.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the problem in the prior art is overcome.

Therefore, the utility model provides a skull fixing device, include:

the first lock head is provided with a first end face and a second end face, the first end face is provided with a first extending part protruding out of the end face of the first lock head, the first extending part is formed into a hollow shape, the side wall of the first extending part is provided with at least one first through hole communicated with the inner cavity of the first extending part, and the outer side wall, close to the first end face, of the first extending part is provided with first threads;

the second lock head is provided with a second extending part protruding out of the end face of the first extending part at one end of the second lock head facing the first extending part, the second extending part is formed into a hollow shape, the inner diameter of the second extending part is consistent with the outer diameter of the first extending part, magnesium alloy is arranged in the inner cavity of the second extending part, a second through hole corresponding to the first through hole and communicated with the inner cavity of the second extending part is formed in the side wall of the second extending part, and second threads matched with the first threads are arranged on the inner side wall of the second extending part and used for fixing the first lock head and the second lock head when the first extending part completely extends into the second extending part;

the first extension part is arranged in the inner cavity of the second extension part in a telescopic mode, and when the first extension part completely extends into the second extension part, the first through hole and the second through hole are communicated with the inner cavities of the first extension part and the second extension part.

Preferably, the first through holes are uniformly arranged along the circumferential direction of the side wall of the first extension part; the second through holes are uniformly arranged along the circumferential direction of the side wall of the second extension part and are in one-to-one correspondence with the first through holes.

Preferably, in the skull fixing device, the first through hole and the second through hole are both elongated through holes and are arranged to extend along the axial direction of the respective corresponding extension parts.

Preferably, in the skull fixing device, a first clamping piece is arranged on the first end surface of the first lock head at a position avoiding the first extending part; and/or a second clamping piece is arranged at the position, avoiding the second extending part, of the end surface of the second lock head with the second extending part.

Preferably, in the skull fixing device, a first buffer piece is arranged on the end surface of the first clamping piece; and/or a second buffer piece is arranged on the end surface of the second clamping piece.

Preferably, the skull bone fixation device, the first and second bumpers are hemispherical protrusions.

Preferably, in the skull fixing device, a groove is formed on the second end face of the first lock head, and a rotating handle is arranged in the groove.

Preferably, the skull fixing device is provided with a sealing cover at the notch of the groove, and the sealing cover can be rotatably covered at the notch of the groove in parallel with the second end face.

Preferably, the skull fixing device is provided with a first flange at the opening of the first extension part, a second flange matched with the first flange is correspondingly arranged at the opening of the second extension part, and when the first extension part extends out of the second extension part, the first flange and the second flange are abutted.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a skull fixing device, including first tapered end and second tapered end, the first terminal surface of first tapered end has the first extension of protrusion its terminal surface, the terminal surface of second tapered end towards first extension has the second extension of protrusion its terminal surface, first extension and second extension form to be hollow and first extension telescopic setting in the second extension inner chamber, the lateral wall of first extension is seted up first through-hole and first screw thread, the lateral wall of second extension is seted up second through-hole and second screw thread correspondingly, first through-hole and second through-hole communicate when first extension stretches into second extension inner chamber completely, form the passageway that communicates with first extension and second extension inner chamber, make the magnesium alloy release of second extension inner chamber induce osteogenesis factor biological activity magnesium ion and spread to surrounding bone tissue, be favorable to the bone growth of amazing skull and skull flap, the recovery speed is accelerated; and the first lock head and the second lock head are fastened and fixed through the first thread and the second thread.

2. The utility model provides a skull fixing device, the first terminal surface of first extension are equipped with the tight piece of first clamp, and the second terminal surface of second extension is equipped with the tight piece of second clamp, and the setting through the tight piece of first clamp and the tight piece of second clamp can press from both sides first tapered end and second tapered end clamp tightly to be fixed at the both ends of skull bone lamella, prevents that first tapered end and second tapered end from taking place to skid when the compression is fixed and skull bone lamella and causing the phenomenon of secondary damage, improves the security.

3. The utility model provides a skull fixing device is equipped with first buffer layer at the terminal surface of the tight piece of first clamp, and the terminal surface of the tight piece of second clamp is equipped with the second buffer layer, and the setting of buffer layer can reduce the damage of first tapered end and second tapered end to skull bone lamella when locking is fixed.

4. The utility model provides a skull fixing device has seted up the recess on the second terminal surface of first tapered end, is equipped with twist grip in the recess, rotates through twist grip and makes first tapered end and second tapered end fixed, convenient operation, and setting up of recess makes twist grip be located first tapered end simultaneously, has avoided causing whole volume too big in first tapered end outer end with the twist grip setting.

5. The utility model provides a skull fixing device, first extension bottom opening part are equipped with first flange, and second extension top opening is equipped with the matched with second flange, can connect both not to separate through setting up of first flange and second flange, need not to assemble again during the use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a front view of the skull bone fixation device with the first locking head and the second locking head separated (with the cover in an open state);

FIG. 2 is a cross-sectional block diagram of FIG. 1 of a skull fixation device in an embodiment of the invention;

FIG. 3 is a view showing the first and second locking heads of the skull bone fixation device according to the embodiment of the present invention in a compressed state (closed state of the sealing cap);

FIG. 4 is a cross-sectional block diagram of FIG. 3 of a skull fixation device in an embodiment of the invention;

FIG. 5 is a block diagram of a second through hole of a second extension of a skull fixation device in an embodiment of the invention;

FIG. 6 is a block diagram of a skull fixation device in an embodiment of the invention (with a first flange and a second flange);

FIG. 7 is another view of the second through hole of the second extension of the skull fixation device in an embodiment of the invention;

fig. 8 a-8 f are six top views of the second bumper of the second lock of the skull bone fixation device according to embodiments of the present invention.

Description of reference numerals:

10-a first lock head; 11-a first extension; 12 a first via hole; 13-a first thread; 14-a first clamping tab; 15-a first buffer; 16-a first bore; 17-a groove;

20-a second lock head; 21-a second extension; 22-a second via; 23-a second thread; 24-a second grip tab; 25-a second buffer; 26-a second bore;

30-magnesium alloy;

40-rotating the handle;

50-sealing the cover;

60-a first flange;

70-a second flange;

80-an elastic member.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

The skull fixing device of the present embodiment, as shown in fig. 1 to 8, includes a first locking head 10, a second locking head 20, a first extension 11 and a second extension 21, the first locking head 10 is formed into a circular sheet shape, and has a first end surface and a second end surface opposite to each other, the first end surface, i.e. the lower end surface shown in fig. 1, has a first extension 11 protruding from its end surface, i.e. protruding downward, the first extension 11 is formed into a hollow cylindrical shape, the side wall of the first extension 11 is provided with at least one first through hole 12 communicating with the inner cavity (not shown) of the first extension 11, i.e. the first through hole 12 radially penetrates through the side wall of the first extension 11; the second locking head 20 is formed into a disc shape, the end surface, i.e. the upper end surface, of the second locking head 20 facing the first extension portion 11 is provided with a second extension portion 21 protruding from the end surface, i.e. protruding upwards, the second extension portion 21 is also formed into a hollow cylindrical shape, the side wall of the second extension portion 21 is provided with a second through hole 22 communicated with the inner cavity of the second extension portion 21, i.e. the second through hole 22 radially penetrates through the side wall of the second extension portion 21, the second through hole 22 is arranged corresponding to the first through hole 12, the outer diameter of the first extension portion 11 is consistent with the inner diameter of the second extension portion 21, i.e. the second extension portion 21 can accommodate the first extension portion 11, the inner cavity of the second extension, can release the osteogenesis inducing factor such as bioactive magnesium ions, the height of the magnesium alloy 30 is consistent with the height of the second extension part 21 or slightly lower than the height of the second extension part 21, and the first extension part 11 is prevented from extending into the inner cavity of the second extension part 21 to interfere with the magnesium alloy 30; the outer side wall of the first extension part 11 close to the first end surface, namely the outer side wall of the upper end of the first extension part 11, is provided with a first thread 13, the inner side wall of the second extension part 21 is provided with a second thread 23 matched with the first thread 13, the first extension part 11 is in threaded connection with the second thread 23 of the second extension part 21 through the matching of the first thread 13 and the second thread 23, and the first extension part 11 completely extends into the inner cavity of the second extension part 21, namely the bottom end of the first extension part 11 is abutted against the bottom end of the second extension part 21 to rotate so as to fix the first lock head 10 and the second lock head 20; the first extension part 11 is telescopically arranged in the inner cavity of the second extension part 21, when the first extension part 11 is completely extended to the bottom end of the second extension part 21, the first through hole 12, the second through hole 22 and the inner cavities of the first extension part 11 and the second extension part 21 are all communicated, and the magnesium alloy 30 in the inner cavity of the second extension part 21 can release an induced osteogenesis factor through a release channel formed by the first through hole 12 and the second through hole 22 so as to be diffused to the surrounding bone tissue, thereby being beneficial to stimulating the bone growth of the skull (not shown) and the skull flap (not shown) at the two ends of the skull fixing system, and particularly being seen in the prior art in the background art. The first extension part 11 is telescopically arranged in the inner cavity of the second extension part 21 through thread fit connection, and the first lock head 10 and the second lock head 20 are fixed through the fit of a first thread 13 and a second thread 23 when the first end surface of the first lock head 10 and the end surface of the second lock head 20 facing the first lock head 10 are respectively attached to the skull and the skull flap; simple structure and convenient operation.

As shown in fig. 1 and 3, each of the first through hole 12 and the second through hole 22 is an elongated hole and extends along an axial direction of the corresponding extension portion, that is, the first through hole 12 extends along an axis of the first extension portion 11, the second through hole 22 extends along an axis of the second extension portion 21, each of the first through hole 12 and the second through hole 22 is provided with a plurality of through holes, and the plurality of first through holes 12 are uniformly arranged along a circumferential direction of a side wall of the first extension portion 11; the plurality of second through holes 22 are uniformly arranged along the circumferential direction of the sidewall of the second extension 21 and correspond to the first through holes 12 one to one. For example, the first through hole 12 and the second through hole 22 are each provided with one, two, three, four, five, six, seven, eight, and so on. As an alternative embodiment, the first through hole 12 and the second through hole 22 may also be kidney-shaped holes as shown in fig. 6, three kidney-shaped holes are arranged on one side wall of the first extending portion 11 at intervals along the axial direction of the first extending portion 11, correspondingly, three kidney-shaped holes are also arranged on one side wall of the second extending portion 21 at intervals along the axial direction of the second extending portion 21 and correspond to the first through hole 12; or as shown in fig. 7, three circular holes are formed in the side walls of the first extension 11 and the second extension 21 and are arranged at intervals along the corresponding axial direction; of course, the holes may be shaped as other shapes, such as polygonal holes, as long as the first through hole 12 and the second through hole 22 are communicated with the inner cavities of the first extension 11 and the second extension 21 after the first extension 11 and the second extension 21 are fixed, so that the magnesium alloy 30 in the inner cavity of the second extension 21 can release the induced osteogenesis factor to the surrounding bone tissue.

As shown in fig. 1, a first clamping piece 14 is disposed on a first end surface of the first lock head 10 at a position avoiding the first extension 11; the end surface of the second lock cylinder 20 having the second extension 21 is provided with a second clamping piece 24 at a position avoiding the second extension 21. As an alternative embodiment, the first clamping piece 14 may be provided only on the first end face of the first lock head 10, or the second clamping piece 24 may be provided only on the end face of the second lock head 20 having the second extension 21, and there is no need to provide the clamping pieces on both the first lock head 10 and the second lock head 20, but it is preferable to provide the clamping pieces on both the first lock head 10 and the second lock head 20 for structural stability and fixing strength to prevent slipping during fixing and causing secondary damage.

As shown in fig. 1, the cross-section of the first clamping piece 14 and the second clamping piece 24 is formed into a trapezoid, preferably an isosceles trapezoid, but may also be other shapes, such as a triangle, a rectangle, etc., as long as the first end surface of the first lock head 10 and the end surface of the second lock head 20 provided with the second extension 21 can be respectively attached and fixed to the two ends of the skull and the skull flap when the first extension 11 extends into the second extension 21. The first clamping piece 14 and the second clamping piece 24 may be an integral piece, or may be formed by splicing a plurality of clamping pieces side by side.

The second clamping piece 24 may be a circle of the second clamping piece concentrically arranged with the second extension 21 as shown in fig. 1, but of course, the second clamping piece 24 may also be formed as a triangle as shown in fig. 8 (a), preferably an equilateral triangle; the second grip tab 24 shown in fig. 8 (b) is formed in a rectangular shape, preferably a square shape; the second grip piece 24 shown in fig. 8 (c) is formed in an x shape; the second grip piece 24 shown in fig. 8 (d) is formed in a shape of a Chinese character mi; the second grip piece 24 shown in fig. 8 (e) is formed in a cross shape; the second grip piece 24 shown in fig. 8 (f) is formed in a straight shape. The structure of the first clamping piece 14 corresponds to the structure of the second clamping piece 24 and will not be described in detail.

As shown in fig. 1, a first buffer 15 is provided on an end surface of the first clamping piece 14; a second buffer 25 is arranged on the end face of the second clamping piece 24. As an alternative embodiment, the first buffer 15 may be provided only on the end face of the first grip piece 14, or the second buffer 25 may be provided only on the end face of the second grip piece 24, and it is not necessary to provide a buffer on both the first grip piece 14 and the second grip piece 24, but it is preferable to provide a buffer on both the first grip piece 14 and the second grip piece 24 for structural stability.

As shown in fig. 1, the first cushion member 15 is formed as a plurality of hemispherical projections provided on the end surface of the first grip piece 14, and the second cushion member 25 is formed as a plurality of hemispherical projections provided on the end surface of the second grip piece 24. As an alternative, the first damping means 15 can also be a hemispherical projection arranged on the end face of the first clamping piece 14, and correspondingly the second damping means 25 can be a hemispherical projection arranged on the end face of the second clamping piece 24. The number of the first and

second buffers

15 and 25 is not particularly limited.

As shown in fig. 1, the first buffer member 15 is provided with a first hole 16, and the second buffer member 25 is correspondingly provided with a second hole 26, and the first hole 16 and the second hole 26 are arranged to further enhance the buffering effect of the first buffer member 15 and the second buffer member 25.

As shown in fig. 1, a groove 17 is formed in the middle of the second end surface of the first lock head 10, a rotating handle 40 is arranged in the groove 17, and the rotating handle 40 is fixed to the first lock head 10; the purpose of arranging the rotating handle 40 is to facilitate manual rotation operation, and rotating the rotating handle 40 drives the first lock head 10 and the first extension part 11 to rotate synchronously so that the first extension part 11 can be fixedly connected with the second extension part 21 in a threaded manner when extending into the inner cavity of the second extension part 21; the provision of the recess 17 reduces the overall size of the structure, and the provision of the wall surface on the outside of the first lock head 10 with the twist grip 40 results in a larger overall structure.

As shown in fig. 1, a cover 50 is disposed at the notch of the groove 17, and the cover 50 is rotatably disposed at the notch of the groove 17 in parallel with the second end surface. The sealing cover 50 is arranged to allow human tissues and blood on the wall surface to enter the groove; while the horizontal rotation type structure is adopted to facilitate the opening and closing, the rotation type structure of the cover 50 is a relatively conventional technical means for those skilled in the art, and will not be described and limited in detail herein.

As shown in fig. 5, a first flange 60 is disposed at an opening of the first extending portion 11, that is, at a lower end shown in fig. 5, and a second flange 70 is correspondingly disposed at an opening of the second extending portion 21, that is, at an upper end of the second extending portion 21 shown in fig. 5, and is engaged with the opening, that is, at the opening of the second extending portion 21, that is, at the upper end of the second extending portion 21, and when the first extending portion 11 extends out of the second extending portion 21, a bottom end of the first flange 60 is abutted to a top end of the second flange 70, so that the first extending portion 11 is always located in the second extending portion 21, and the first locking head 10 and the second.

It should be noted that, the first locking head 10, the second locking head 20, the first extending portion 11, the second extending portion 21, the first clamping piece 14, the second clamping piece 24, the first buffering piece 15, the second buffering piece 25, the rotating handle 40, the cover 50, the first flange 60 and the second flange 70 of the present invention are made of PPDO (polydioxanone) material with good biocompatibility, so that the use is safer and more reliable.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A skull fixation device, comprising:

the locking device comprises a first locking head (10), wherein a first end face and a second end face are formed on the first locking head (10), the first end face is provided with a first extending part (11) protruding out of the end face of the first locking head, the first extending part (11) is formed in a hollow shape, at least one first through hole (12) communicated with an inner cavity of the first extending part (11) is formed in the side wall of the first extending part (11), and a first thread (13) is arranged on the outer side wall, close to the first end face, of the first extending part (11);

a second locking head (20), one end of the second locking head (20) facing the first extension part (11) is provided with a second extension part (21) protruding the end surface of the second extension part, the second extension part (21) is formed in a hollow shape and the inner diameter of the second extension part (21) is identical to the outer diameter of the first extension part (11), a magnesium alloy (30) is arranged in the inner cavity of the second extending part (21), a second through hole (22) which corresponds to the first through hole (12) and is communicated with the inner cavity of the second extending part (21) is arranged on the side wall of the second extending part (21), a second thread (23) matched with the first thread (13) is arranged on the inner side wall of the second extension part (21) and used for fixing the first lock head (10) and the second lock head (20) when the first extension part (11) completely extends into the second extension part (21);

the first extension part (11) is telescopically arranged in the inner cavity of the second extension part (21), and when the first extension part (11) completely extends into the second extension part (21), the first through hole (12) and the second through hole (22) are communicated with the inner cavities of the first extension part (11) and the second extension part (21).

2. Skull fixation device according to claim 1, wherein the first through holes (12) are circumferentially evenly arranged along the side wall of the first extension (11); the second through holes (22) are uniformly arranged along the circumferential direction of the side wall of the second extension part (21) and correspond to the first through holes (12) one by one.

3. Skull fixation device according to claim 2, wherein the first through hole (12) and the second through hole (22) are each an elongated through hole extending along the axial direction of the respective extension.

4. Skull fixation device according to claim 1, wherein a first clamping piece (14) is provided on a first end surface of the first locking head (10) at a position avoiding the first extension (11); and/or a second clamping piece (24) is arranged at the position of the end surface of the second lock head (20) with the second extension part (21) avoiding the second extension part (21).

5. Skull fixation device according to claim 4, wherein a first bumper (15) is provided on an end face of the first clamping plate (14); and/or a second buffer piece (25) is arranged on the end surface of the second clamping piece (24).

6. The skull fixation device according to claim 5, wherein the first (15) and the second (25) bumper are hemispherical protrusions.

7. Skull fixation device according to claim 1, wherein a groove (17) is provided on the second end face of the first locking head (10), and wherein a rotating handle (40) is provided in the groove (17).

8. Skull fixation device according to claim 7, wherein a cover (50) is provided at the notch of the groove (17), the cover (50) being rotatably arranged parallel to the second end surface at the notch of the groove (17).

9. Skull fixation device according to any of the claims 1 to 8, wherein a first flange (60) is provided at the opening of the first extension (11), a second flange (70) cooperating with the first flange (60) is provided at the opening of the second extension (21), the first flange (60) and the second flange (70) abutting when the first extension (11) protrudes outside the second extension (21).