CN111904503B

CN111904503B - Hollow screw

Info

Publication number: CN111904503B
Application number: CN202010927688.3A
Authority: CN
Inventors: 史春宝; 付中国; 李红霞; 荣丹
Original assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Current assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2022-03-04
Anticipated expiration: 2040-09-07
Also published as: CN111904503A

Abstract

The invention belongs to the technical field of medical instruments and discloses a hollow screw. A cannulated screw according to the present invention comprises: the hollow screw comprises a hollow screw body and an attaching plate, wherein the hollow screw body comprises a screw cap section, a rod section and a thread section which are coaxially connected, the attaching plate is movably and rotatably arranged on the rod section, a first through hole for penetrating the rod section and at least one second through hole for penetrating a suture are formed in the attaching plate, and the first through hole and the second through hole are not coaxial. The hollow screw of the invention can simplify the fracture surgery process.

Description

Hollow screw

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a hollow screw.

Background

In actual fracture surgery, it is often necessary to separate soft tissues such as tendon ligament, etc. connected to a fractured human bone from the human bone at the site of fracture, and then implant connecting parts such as hollow screws, etc. into the fractured human bone and then connect the soft tissues such as tendon ligament, etc. to the human bone.

In the prior art, a hollow screw is generally adopted to connect a fractured human bone, then a tendon ligament is connected by a suture, a free end of the suture is connected into an anchor, and finally the anchor with the suture is fixed on the human bone.

Disclosure of Invention

In order to simplify the fracture surgery process, the invention provides a hollow screw.

The cannulated screw according to the present invention comprises: the hollow screw comprises a hollow screw body and an attaching plate, wherein the hollow screw body comprises a screw cap section, a rod section and a thread section which are coaxially connected, the attaching plate is movably and rotatably arranged on the rod section, a first through hole for penetrating the rod section and at least one second through hole for penetrating a suture are formed in the attaching plate, and the first through hole and the second through hole are not coaxial.

Furthermore, the attaching plate is also provided with at least one third perforation for penetrating the anchor nail, and the first perforation, the second perforation and the third perforation are all not coaxial.

Furthermore, the second perforation and the third perforation are respectively located on two opposite sides of the attaching plate.

Furthermore, two second through holes and a third through hole are formed on the attaching plate.

Further, the peripheral edge of the second perforation is formed with a plurality of tightening line grooves arranged at intervals.

Furthermore, the attaching plate has any shape to be attached to the surface of the human bone.

Further, the attaching plate has an arc-shaped surface curved toward the threaded section.

Further, the first perforation and the pole segment form clearance fit, so that the attaching plate can shake relative to the pole segment.

Furthermore, a central through hole axially penetrating through the hollow screw body is formed in the hollow screw body and is used for being matched with an external screw implanting device so as to implant the hollow screw into a human bone.

Further, the cannulated screw body further comprises an insertion section coaxially connected with the threaded section, the insertion section being configured to be tapered.

Compared with the prior art, the hollow screw has the following advantages:

1) through setting up hollow screw body and rigging board, make in the fracture operation, the human bone of hollow screw body fixed connection fracture, can directly pass the suture that is used for soft tissues such as fixed ligament tendon in the second perforation on the rigging board, it can realize effective take-up and location to soft tissues such as ligament to pass the second perforation repeatedly through the suture, and finally only need adopt an extra anchor nail can realize the fixed to the suture, reduce the implant that is used for implanting the human body in the operation, this psychological burden that not only can alleviate the patient has still simplified the operation process widely, the operation time has been shortened.

2) The attaching plate is provided with at least one third perforation for penetrating the anchor, so that the hollow screw can be matched with the anchor, the anchor can complete the fixing effect and is further limited in the third perforation, and the fixing strength of the anchor can be further improved.

3) Through setting up the second perforation and the third perforation is located the relative both sides of rigging board respectively so that the suture that passes the second perforation extends to the opposite side of rigging board from one side of rigging board, make the straight line distance between second perforation and the third perforation longer to make the suture can press the rigging board by wider range, thereby improved the fixed intensity of rigging board for human bone surface.

4) Through the stringing grooves formed at the peripheral edge of the second perforation at intervals, the suture can be tensioned and positioned in a specific direction through the stringing grooves after passing out of the second perforation, the tensioned suture is convenient for stably fixing soft tissues such as ligament tendon, and meanwhile, the suture is limited in the stringing grooves in the tensioning process, cannot walk along the edge of the second perforation in the tensioning process of an operator, and is convenient for the operator to operate.

Drawings

FIG. 1 is a schematic structural view of a cannulated screw according to an embodiment of the present invention;

FIG. 2 is a right side view of the cannulated screw according to an embodiment of the present invention shown in FIG. 1;

fig. 3 is a schematic structural view of an attachment plate of the cannulated screw according to an embodiment of the present invention shown in fig. 2.

Detailed Description

For a better understanding of the objects, structure and function of the invention, reference will now be made in detail to the cannulated screws of the present invention as illustrated in the accompanying drawings.

Fig. 1 and 2 show the structure of a cannulated screw 100 according to an embodiment of the present invention, comprising: the hollow screw comprises a hollow screw body 1 and an attaching plate 2, wherein the hollow screw body 1 comprises a nut section 11, a rod section 12 and a thread section 13 which are coaxially connected, the attaching plate 2 is movably and rotatably arranged on the rod section 12, a first through hole 21 (shown in figure 3) for penetrating the rod section 12 and at least one second through hole 22 for penetrating a suture are formed in the attaching plate 2, and the first through hole 21 is not coaxial with the second through hole 22.

It should be noted that the outer diameter of the first through hole 21 may be greater than the outer diameter of the thread section 13 and smaller than the outer diameter of the nut section 11, so that the first through hole 21 of the attachment plate 2 may pass through the thread section 13 of the hollow screw body 1 and be disposed on the rod section 12, when in use, the attachment plate 2 is first connected to the rod section 12, then the attachment plate is matched with the hollow screw body 1 by using an external auxiliary device, the hollow screw body 1 is rotated, and then the hollow screw body 1 is fixed on the fractured human bone, in this process, the hollow screw body 1 and the attachment plate 2 move toward the human bone, after the thread section 13 of the hollow screw body 1 and the rod section 12 are fixed in the human bone to connect the fractured human bone, the fixation of the fractured human bone is primarily completed, at this time, a certain gap may be formed between the inner side surface of the attachment plate 2 and the surface of the human bone after the suture passes through the second through hole 22, which is convenient for an operator to attach the inner side surface of the attachment plate 2 and the human bone Combining; when the suture is used for connecting soft tissues such as ligament tendons, the specific position of the perforation can be adjusted by rotating the attaching plate 2, so that an operator can connect the free end of the suture passing through the second perforation 22 with the soft tissues such as ligament tendons from a proper position, and can lead the suture to the second perforation 22 again, and finally the suture led to the second perforation 22 again can penetrate into additional fixing parts such as anchors and the like, and the fixing parts such as the anchors and the like are fixed in the bone of the human body, so that the fixation of the soft tissues such as ligament tendons and the like is completed.

Certainly, the diameter of the first through hole 21 may also be greater than or equal to the diameter of the rod section 12, and the outer diameters of the first through holes 21 are both smaller than the outer diameters of the nut section 11 and the threaded section 13, the attachment plate 2 and the hollow screw body 1 in this embodiment are not detachable, at this time, the attachment plate 2 is limited to move between the rod sections 12 between the nut section 11 and the threaded section 13, the specific use process of the hollow screw 100 in this embodiment is consistent with the above process, and details are not described here.

According to the hollow screw 100 provided by the embodiment of the invention, the hollow screw body 1 and the attaching plate 2 are arranged, so that in a fracture operation, the hollow screw body 1 is fixedly connected with a fractured human bone, a suture for fixing soft tissues such as ligament tendons and the like can directly pass through the second perforation 22 on the attaching plate 2, the suture can be effectively tensioned and positioned by repeatedly passing through the second perforation 22, and finally, the suture can be fixed by only adopting one additional anchor, so that the operation of adopting a plurality of anchors in the prior art is avoided, namely, implants used for implanting a human body in the operation are reduced, the psychological burden of a patient can be relieved, the operation process is greatly simplified, and the operation time is shortened.

Preferably, the number of the first through holes 21 may be multiple, and the attaching plate 2 is provided with a plurality of first through holes 21 to match with a plurality of hollow screw bodies 1 to fix the fractured human bone better, and the specific number thereof may be specifically set according to actual needs, and is not specifically limited herein.

It is also preferable that the size and shape of the attachment panel 2 can be selected according to the situation of use, for example, when it is desired to fix both ends of the entire seam in the perforations on different sides, the area of the attachment panel 2 can be larger; when one end of the sewing thread needs to be fixed in the through hole on one side, the area of the attaching plate 2 can be relatively smaller, when the attaching plate is manufactured in the previous period, attaching plates 2 with different sizes and specifications can be produced, the sizes of the first through holes 21 of all the attaching plates 2 are consistent so as to obtain the adaptability with the hollow screw body 1, and an operator can select the attaching plate 2 with the most appropriate size according to the use situation.

With reference to fig. 2 and 3, the attachment plate 2 may further have at least one third perforation 23 for passing through the anchor, and the first perforation 21, the second perforation 22 and the third perforation 23 are not coaxial. The hollow screw 100 of the present embodiment can be matched with the anchor through the arrangement, the free end of the suture passing through the second perforation 22 is inserted into the anchor after connecting soft tissues such as ligament tendon, the anchor with the suture can pass through the third perforation 23 and then be fixed in the bone of the human body, the arrangement enables the anchor to complete the fixing function and simultaneously be further limited in the third perforation 23, and therefore, the fixing strength of the anchor can be further improved.

Preferably, the second perforation 22 and the third perforation 23 may be located on opposite sides of the attachment plate 2. By the arrangement, the stitches passing through the second through holes 22 extend from one side of the attachment plate 2 to the other side of the attachment plate 2, that is, the straight distance between the second through holes 22 and the third through holes 23 is made longer, so that the stitches can press the attachment plate 2 in a wider range, thereby improving the fixing strength of the attachment plate 2 relative to the surface of the human bone.

In a preferred embodiment as shown in fig. 2, two second through holes 22 and one third through hole 23 may be formed in the attachment plate 2. When the cannulated screw 100 of this embodiment is used, after the two ends of the suture are respectively passed through the two second through holes 22, the suture is connected with the cannulated screw body 1 inserted into the attachment plate 2, then the two free ends of the suture are sutured with soft tissues such as ligament tendon and the like and then passed through the same additional anchor, and finally the anchor is passed through the third through hole 23 for fixation. Such setting can realize the effective fixed to the suture, and the operation is more convenient.

In the embodiment shown in fig. 2, the peripheral edge of the second aperture 22 may be formed with a plurality of spaced apart fastening slots 24. Through this setting make the suture can be taut location in specific direction through taut line groove 24 after wearing out from second perforation 22, taut suture is convenient for fix soft tissue such as ligament tendon steadily, and the suture is spacing in taut line groove 24 in taut process simultaneously, can not walk along the edge of second perforation 22 in the taut process of operating personnel, makes things convenient for operating personnel to operate.

In a preferred embodiment, the attachment plate 2 may have any shape that attaches to the surface of a human bone. Through this setting make the flitch 2 can be more abundant with human bone surface laminating, and cannulated screw 100 is connected with human bone after fixing in human bone more stably. Also preferably, the edge of the attachment panel 2 may be configured in a rounded arc shape. Through the arrangement, the edge of the attaching plate 2 can not cause injury to human bones or other tissues.

Preferably, the attachment plate 2 may have an arc-shaped surface curved toward the threaded section 13. Make the arcwall face of rigging plate 2 more be suitable for with the shape laminating adaptation on human bone surface through this setting, and be difficult to remove for human bone surface emergence after rigging plate 2 and the human bone laminating.

Further, the first through hole 21 may form a clearance fit with the pole segment 12 to enable the attachment plate 2 to rock relative to the pole segment 12. It should be noted that the wobble is slight and can be used to better adjust the fit of the attachment plate 2 to the surface of the bone.

According to the cannulated screw 100 of an embodiment of the present invention, as shown in fig. 2, a central through hole 15 may be formed on the cannulated screw body 1 to axially penetrate through the cannulated screw body 1, and the central through hole 15 may be used to cooperate with an external screw implantation device to implant the cannulated screw 100 into a bone of a human body. Through the setting, make things convenient for operating personnel to fix cannulated screw body 1 in the human bone of fracture for cannulated screw body 1 can be with the cooperation of outside screw implantation device.

As shown in fig. 1, the cannulated screw body 1 may further comprise an insertion section 14 coaxially connected to the threaded section 13, the insertion section 14 being configured as a taper. By this arrangement, the tapered insertion section 14 facilitates initial positioning of the cannulated screw body 1 in the body bone when fixing a fractured body bone, providing an accurate insertion position for subsequent insertion of the threaded section 13 and the shank section 12.

It should be noted that the second perforation 22 is used for passing a suture, the third perforation 23 is used for passing an anchor, and both the second perforation 22 and the third perforation 23 can be configured as circular perforations, and the hole diameters can be set to be the same, so that the second perforation 22 and the third perforation 23 can be used in common to improve the applicability of the cannulated screw 100; the aperture of the second and

third perforations

22, 23 can also be arranged differently, for example the aperture of the second perforation 22 for passing the suture is smaller and the aperture of the third perforation 23 for passing the anchor is larger.

In addition, the cannulated screw body 1 and the attachment plate 2 of the cannulated screw 100 according to the embodiment of the present invention may be made of the same material, for example, an alloy material such as titanium alloy; different materials may be used for manufacturing, for example, the hollow screw body 1 may be made of absorbable material, and the attachment plate 2 may be made of alloy material which is not absorbable by human body due to the fixing means such as suture or anchor, and is not limited in this respect.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A cannulated screw, comprising:

the hollow screw body comprises a screw cap section, a rod section, a screw thread section and a screw rod section which are coaxially connected

An attachment plate movably rotatably disposed on the pole segment,

wherein the attaching plate is provided with a first perforation for passing through the rod segment and at least one second perforation for passing through a suture, and the first perforation is not coaxial with the second perforation;

a plurality of tightening line grooves arranged at intervals are formed at the peripheral edge of the second perforation, so that the suture can be tensioned and positioned in a specific direction through the tightening line grooves after passing through the second perforation;

the attaching plate is also provided with at least one third perforation for passing through an anchor, and the first perforation, the second perforation and the third perforation are not coaxial;

the second perforation and the third perforation are respectively located on two opposite sides of the attaching plate, a free end of a suture passing through the second perforation is threaded into the anchor, and the anchor with the suture is fixed after passing through the third perforation, so that the suture passing through the second perforation extends from one side of the attaching plate to the other side of the attaching plate.

2. The cannulated screw of claim 1, wherein two of the second perforations and one of the third perforations are formed in the attachment plate.

3. The cannulated screw of any one of claims 1 to 2, wherein the abutment plate has any shape which abuts a surface of a human bone.

4. The cannulated screw of claim 3, wherein the abutment plate has an arcuate surface curved towards the threaded section.

5. The cannulated screw of any one of claims 1 to 2, wherein the first bore forms a clearance fit with the rod section to enable the abutment plate to wobble relative to the rod section.

6. The cannulated screw of any one of claims 1-2, wherein the cannulated screw body is formed with a central through hole extending axially therethrough for cooperation with an external screw implantation device for implantation of the cannulated screw into a bone of a human body.

7. The cannulated screw of any of claims 1-2, wherein the cannulated screw body further comprises an insertion section coaxially connected to the threaded section, the insertion section being configured to be tapered.