CN111904502A

CN111904502A - Anchor and anchor inserting device

Info

Publication number: CN111904502A
Application number: CN202010921098.XA
Authority: CN
Inventors: 史春宝; 李红霞; 吴增光
Original assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Current assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2020-11-10

Abstract

The invention belongs to the technical field of medical instruments and discloses an anchor and an anchor inserting device. According to the invention, the anchor comprises: the anchor body comprises a leading-in section and a connecting section, wherein the leading-in section is used for being inserted into a preset positioning hole, the connecting section is coaxially connected with the leading-in section and is used for being fixed in the positioning hole, a guide groove extending out of the leading-in section from the outer peripheral wall of the connecting section is formed in the outer peripheral wall of the anchor body, and an included angle is formed between the central line of the guide groove and the central axis of the anchor body. The anchor can be accurately positioned in a preset bone canal.

Description

Anchor and anchor inserting device

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to an anchor and an anchor inserting device.

Background

When the soft tissue of the body is torn from the bone and needs repair, the surgeon often inserts a threaded anchor into the bone using an anchor insertion device to secure the soft tissue to the bone with the suture.

In operation, to ensure the accuracy of positioning the anchor on the bone, a bone tract is usually pre-drilled on the bone, and a positioning needle is inserted into the bone tract to prevent the pre-drilled bone tract from being found when the anchor insertion device is inserted into the anchor, but the conventional anchor needs to remove the positioning needle before insertion, and the tendon is easy to rebound during the process, or bleeding occurs, so that the anchor is not easy to align with the pre-drilled bone tract.

Disclosure of Invention

The invention provides an anchor and an anchor inserting device, which are used for accurately positioning the anchor in a preset bone channel.

According to the invention, the anchor comprises: the anchor body comprises a leading-in section and a connecting section, wherein the leading-in section is used for being inserted into a preset positioning hole, the connecting section is coaxially connected with the leading-in section and is used for being fixed in the positioning hole, a guide groove extending out of the leading-in section from the outer peripheral wall of the connecting section is formed in the outer peripheral wall of the anchor body, and an included angle is formed between the central line of the guide groove and the central axis of the anchor body.

Further, the guide groove is configured to extend from the outer peripheral wall of the connection section to the outer peripheral wall of the introduction section.

Further, the guide groove is configured to extend an end surface of the introduction section from the outer peripheral wall of the connection section so that the end surface of the introduction section is formed with an opening.

Further, the introduction section is configured to be tapered, the connection section is configured to be cylindrical, and an external thread is formed on an outer peripheral wall of the connection section, the external thread including a plurality of single-turn threads formed at intervals.

Furthermore, a threading hole which radially penetrates through the connecting section is formed in the connecting section, and the threading hole is not communicated with the guide groove.

The invention also provides an anchor inserting device which comprises the anchor and an implanting rod detachably connected with the anchor.

Further, implant the pole and include the operation section of can dismantling the connection with the connecting segment of anchor nail and with operation section integrated into one piece's handle section to and fixed connection is at operation section or handle section on the drawing drum, the external diameter size of drawing drum is greater than the external diameter size of handle section.

Further, one of the operation section of the implantation rod and the connection section of the anchor is provided with a connection prism, and the other one is provided with a connection groove matched with the connection prism.

Further, pay off reel includes the dish body and follows a plurality of tight line grooves of the circumferential interval setting of the dish body.

Further, the anchor insertion device further comprises a threading component, the threading component comprises an operating handle and a threading ring fixedly connected with the operating handle, and the threading ring is configured to be deformable, so that when the threading component is inserted into the threading hole, the threading ring is changed into a thread shape for inserting the threading hole, and after the threading ring is inserted into the threading hole, the threading ring can be changed into a ring shape for inserting a thread.

Compared with the prior art, the anchor provided by the invention has the following advantages:

1) the guide groove used for inserting the positioning needle is formed in the peripheral wall of the anchor body, so that an operator does not need to pull out the positioning needle before inserting the anchor into the positioning hole, the anchor can be accurately positioned and fixed in the positioning hole which is punched in advance along the positioning needle, and the problem that the anchor in the prior art is difficult to align to the positioning hole which is punched in advance due to the fact that the anchor needs to be removed with the positioning needle before being inserted into the positioning hole to cause tendon rebound shrinkage or intraoperative hemorrhage is avoided.

2) When the guide groove is constructed to extend out of the end face of the guide section from the peripheral wall of the connecting section, and the end face of the guide section is provided with the opening, the extending end of the guide groove is a through hole of a closed loop, and the positioning needle cannot be separated from the guide groove due to rotation or other horizontal operations after being inserted into the guide groove through the opening, namely, the positioning needle can be assisted to ensure the positioning accuracy together; when the guide groove is constructed to extend out of the peripheral wall of the leading-in section from the peripheral wall of the connecting section, the guide groove is formed into a through groove of an open ring extending from the peripheral wall of the connecting section to the peripheral wall of the leading-in section, when the guide groove anchoring device is used, the guide groove anchoring nail is only required to be aligned to the positioning needle, and the guide groove anchoring nail is inclined towards the direction of the positioning needle, so that the positioning needle is accommodated in the guide groove.

3) The tapered leading-in section is arranged, so that the anchor can be conveniently and preliminarily positioned in the positioning hole, and the cylindrical connecting section is arranged, so that the anchor can further go deep into the positioning hole under the action of external force, and the connection between the anchor and the positioning hole is firmer.

4) Make the anchor can link to each other with the suture and cooperate the suture to realize connecting the effect of soft tissues such as fixed tendon ligament on the one hand through setting up the through wires hole and the guide way and not communicate, on the other hand the through wires hole that does not communicate makes through wires hole and guide way form into two independent passageways with the guide way, can not mutual interference when using, the operation of being convenient for.

Compared with the prior art, the anchor inserting device has the following advantages:

1) by forming the guide groove for inserting the positioning needle on the peripheral wall of the anchor body, an operator does not need to pull out the positioning needle before inserting the anchor into the positioning hole, and the anchor can be accurately positioned and fixed in the positioning hole which is punched in advance along the positioning needle.

2) The implantation rod has higher structural strength and longer service life by arranging the integrally formed operation section and the handle section; through setting up the drawing drum taut suture of being convenient for on the one hand, improve the joint strength of suture, on the other hand still can be convenient for comb many sutures to avoid many sutures the phenomenon of knoing to the suture of different roots is arranged in different positions in order to operating personnel.

3) Through the detachable connection mode of the connecting prism and the connecting groove, the inserting rod is connected with the anchor or separated from the anchor, only acting force towards or away from the anchor needs to be applied to the implanting rod, namely the implanting rod does not need to be rotated like the prior art, and therefore the condition that a suture is rotated or knotted can not occur.

Drawings

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

FIG. 2 is a schematic structural view of an anchor stud according to a first embodiment of the present invention showing a connection recess;

FIG. 3 is a schematic structural view of an anchor according to a second embodiment of the present invention;

FIG. 4 is a schematic structural view of an anchor insertion device according to an embodiment of the present invention;

fig. 5 is a schematic view of the implant rod of the anchor insertion device of fig. 4.

Detailed Description

For a better understanding of the objects, structure and function of the invention, the anchor and the anchor inserter device of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1-3 illustrate the construction of an anchor 100 according to the present invention, comprising: the anchor body 1 comprises a leading-in section 11 inserted into a preset positioning hole and a connecting section 12 coaxially connected with the leading-in section 11 and fixed in the positioning hole, wherein a guide groove 13 extending out of the leading-in section 11 from the outer peripheral wall of the connecting section 12 is formed in the outer peripheral wall of the anchor body 1, and an included angle alpha is formed between the central line of the guide groove 13 and the central axis of the anchor body 1.

In the actual operation process, firstly, an operator pre-opens a positioning hole in the bone of the patient, and inserts a positioning needle into the positioning hole to indicate the specific position where the anchor 100 is to be inserted, the anchor 100 of this embodiment is connected with the implantation rod 2 as shown in fig. 5 when in use, the operator aligns the guide slot 13 of the anchor 100 with the positioning needle, and manipulates the implantation rod 2 to move the anchor 100 towards the positioning needle until the positioning needle penetrates into the guide slot 13, the anchor 100 enters the pre-opened positioning hole along the insertion direction of the positioning needle, when the position of the anchor 100 is determined, the positioning needle can be pulled out from the guide slot 13, and finally, the anchor 100 is fixed in the positioning hole.

According to the anchor 100 of the embodiment, the guide groove 13 for inserting the positioning needle is formed in the peripheral wall of the anchor body 1, so that an operator does not need to pull out the positioning needle before inserting the anchor 100 into the positioning hole, the anchor 100 can be accurately positioned and fixed in the positioning hole which is drilled in advance along the positioning needle, and the problem that the anchor 100 is difficult to align with the positioning hole which is drilled in advance due to the fact that the positioning needle needs to be removed before inserting the positioning hole in the prior art to cause tendon rebound contraction or intraoperative hemorrhage is avoided.

Since the central line of the guiding groove 13 forms an included angle α with the central axis of the anchor 100, that is, the guiding groove 13 is obliquely formed on the outer peripheral wall of the anchor body 1, the strength of the whole anchor 100 is less weakened, and therefore, the anchor 100 is suitable for some special cases such as osteoporosis patients. Specifically, the anchor 100 of the present embodiment may be a solid structure with high strength, but the weight of the anchor 100 made of a general material such as titanium alloy may cause great damage to the bone of the patient with osteoporosis, and at this time, a peek material (polyetheretherketone, a special polymer material) or an absorbable composite material may be used to avoid excessive damage to the bone of the patient.

In a first embodiment of anchor 100 as shown in fig. 1 and 2, guide slot 13 may be configured to extend from the peripheral wall of connecting section 12 beyond the end face of lead-in section 11 such that the end face of lead-in section 11 is formed with an opening 111. Through the arrangement, the extending tail end of the guide groove 13 is a closed-loop through hole, and the positioning needle cannot be pulled out of the guide groove 13 due to rotation or other horizontal operations after being inserted into the guide groove 13 through the opening 111, namely, the positioning needle can be assisted to ensure the positioning accuracy together.

In a second embodiment of anchor 100 as shown in fig. 3, guide slot 13 may be configured to extend from the peripheral wall of connecting section 12 to the peripheral wall of lead-in section 11. Through this setting make guide way 13 form the logical groove of open-loop that extends to leading-in section 11 periphery wall from the periphery wall of linkage segment 12, only need when using with the guide way 13 alignment pilot pin of anchor 100 to incline towards the direction of pilot pin so that the pilot pin is held in guide way 13 can, simple structure, convenient operation.

According to the present invention, in the above two embodiments, the leading-in section 11 of the anchor 100 may be configured to be conical, the connecting section 12 may be configured to be cylindrical, the outer circumferential wall of the connecting section 12 may be formed with the external thread 121, and the external thread 121 may include a plurality of single-turn threads formed at intervals. The tapered lead-in section 11 can facilitate the initial positioning of the anchor 100 in the positioning hole, and the cylindrical connecting section 12 can further enable the anchor 100 to go deep into the positioning hole under the action of external force, so that the connection between the anchor 100 and the positioning hole is firmer. Here, the following are mentioned: the "single-turn thread" means a closed-loop thread formed on the same horizontal plane, and after the anchor 100 is fixed in the positioning hole, the operator may directly knock the implant rod 2 as shown in fig. 5 so that the introduction section 11 and the connection section 12 are inserted and fixed in the positioning hole.

Of course, the thread of the external thread 211 may be an oblique thread, which is a whole thread formed at one time, and the operator may rotate the introduction section 11 and the connection section 12 into the positioning hole by rotating the implantation rod 2 as shown in fig. 5. The mode of rotating the implantation rod 2 to fix the anchor 100 is relatively labor-saving; the manner of tapping the rod 2 anchor 100 is simple and avoids the knotting of the suture that may occur due to rotation.

As shown in fig. 1 and 3, the connecting section 12 may be formed with a threading hole 122 radially penetrating the connecting section 12, and the threading hole 122 is not communicated with the guide groove 13. Make anchor 100 can link to each other and cooperate the suture to realize connecting the effect of soft tissue such as fixed tendon ligament through above-mentioned setting on the one hand, on the other hand not through wires hole 122 and guide way 13 that communicate make through wires hole 122 and guide way 13 form into two independent passageways, and suture and pilot pin have independent passageway separately promptly, can not mutual interference when using, the operation of being convenient for.

Of course, the specific arrangement manner of the threading holes 122 is not limited to the above, for example, the number of the threading holes 122 may be one or more, and the direction of the threading holes 122 may radially penetrate through the connecting section 12, that is, the axial direction of the threading holes 122 is perpendicular to the axial direction of the connecting section 12, or may be obliquely arranged along the radial direction of the connecting section 12, that is, the axial direction of the threading holes 122 is not perpendicular to the axial direction of the connecting section 12; when the threading hole 122 is arranged to radially penetrate the connecting section 12, the threading hole 122 may also communicate with the guiding groove 13, since the diameter of the suture and the positioning needle is much smaller than the radial dimension of the anchor 100, and in order to facilitate the threading of the suture from the threading hole 122 and the positioning needle from the guiding groove 13, the radial dimension of the threading hole 122 and the guiding groove 13 needs to be set much larger than the diameter of the suture and the positioning needle, so that the suture and the positioning needle will not interfere in the communicating threading hole 122 and the guiding groove 13 without error.

Fig. 4 illustrates the configuration of an anchor insertion device 200 according to an embodiment of the present invention, including the above-described anchor 100 and the implant rod 2 (shown in fig. 5) detachably connected to the anchor 100. When the anchor inserting device 200 of the embodiment is used, because the guide groove 13 is arranged on the anchor 100, an operator does not need to pull out the positioning needle before inserting the anchor 100 into the positioning hole, the anchor 100 can be accurately positioned and fixed in the positioning hole which is drilled in advance along the positioning needle, and the problem that the anchor inserting device 200 is difficult to align with the positioning hole which is drilled in advance due to the fact that the positioning needle needs to be removed before inserting the anchor 100 into the positioning hole in the prior art to cause tendon rebound contraction or intraoperative hemorrhage is avoided.

The implant rod 2 as shown in fig. 5 may include a manipulation section 21 detachably connected to the connection section 12 of the anchor 100, a handle section 22 integrally formed with the manipulation section 21, and a payout reel 23 fixedly connected to the manipulation section 21 or the handle section 22, and the payout reel 23 may have an outer diameter dimension larger than that of the handle section 22. The integral operation section 21 and the handle section 22 are provided, so that the implantation rod 2 has higher structural strength and longer service life. In the process of suturing soft tissues such as bones, tendon ligaments and the like, after an anchor provided with a plurality of sutures is implanted into a positioning hole, the free end of each suture passes through the soft tissues such as the tendon ligaments and the like to be sutured and then is placed on the pay-off reel 23, the pay-off reel 23 is convenient for tensioning the sutures on one hand, particularly for enabling the plurality of sutures to be tensioned in a cross way so as to improve the connection strength of the sutures on the other hand, and is also convenient for combing the plurality of sutures on the other hand, thereby avoiding the knotting phenomenon of the plurality of sutures and facilitating the operators to place; as shown in fig. 5, when the outer diameter of the handle segment 22 is greater than the outer diameter of the operating segment 21, a step capable of abutting against the pay-off reel 23 is formed at the joint of the operating segment 21 and the handle segment 22, the pay-off reel 23 passes through the operating segment 21 to abut against and be fixed to the handle segment 22, and the step is used for increasing the contact area between the pay-off reel 23 and the handle segment 22, so that the connection stability is better.

Of course, the pay-off reel 23 can also be arranged to be sleeved and positioned at different positions of the operation section 21, and with reference to fig. 4 and 5, the operator can adjust the fixing position of the pay-off reel 23 relative to the operation section 21 according to the length of the suture and the needs of the operation.

Referring to fig. 2 and 5, one of the operation section 21 of the implantation rod 2 and the connection section 12 of the anchor 100 may be formed with a connection prism 211, and the other may be formed with a connection groove 123 (as shown in fig. 2) to be fitted with the connection prism 211. The threaded connection commonly used in the prior art to connect the anchor 100 to the implant rod 2 results in rotation of the suture in the anchor 100 during rotation of the implant rod 2 to connect or disconnect the implant rod 2 from the anchor 100, ultimately resulting in knotting of the suture. In the embodiment, the detachable connection mode of the connection prism 211 and the connection groove 123 is arranged, so that in the process of connecting or disconnecting the insertion rod 2 with the anchor nail 100, only a force towards or away from the anchor nail 100 needs to be applied to the implantation rod 2, that is, the implantation rod 2 does not need to be rotated as in the prior art, and therefore, the suture can not be rotated or knotted.

Preferably, as shown in fig. 5, the connection prism 211 may be formed on the operation section 21, and the connection groove 123 may be formed on the connection section 12 of the anchor 100; it is further preferable that the connection prism 211 has an outer diameter size gradually decreasing from a fixed end connected to the operation section 21 toward an end away from the operation section 21. When the anchor 100 is fixed in the positioning hole, an external force towards the direction of the anchor 100 needs to be applied to the implantation rod 2, and by the arrangement, when the anchor 100 is fixed in the positioning hole, the connection prism 211 is gradually pressed down in the connection groove 123, the connection between the connection prism and the connection groove is more sufficient, so that the implantation rod 2 is more stably connected with the anchor 100; when the implantation rod 2 needs to be separated from the anchor 100, the small-diameter end of the connection prism 211 moves towards the large-diameter end of the connection groove 123, so that the connection prism and the connection groove can be conveniently separated.

As shown in fig. 4, payout reel 23 may include a reel body 231 and a plurality of tightening wire grooves 232 arranged at intervals along the circumferential direction of reel body 231. Make a plurality of sutures of wearing out in soft tissues such as tendon ligament can place respectively in the tight wire casing of difference and be tightened up through this setting, prevent to appear tying off or the suture does not tighten up the insecure problem of connection that arouses because of many suture winding.

In a preferred embodiment, the cinch slots 232 have a tapered width extending from the peripheral edge of the disc body 231 toward the center of the disc body 231, which arrangement enables the suture to be quickly and easily advanced into the cinch slots 231 and ultimately placed in compression at the bottom of the cinch slots 232.

In the embodiment shown in fig. 4, the anchor insertion device 200 may further include a threading member 3, the threading member 3 may include a handle 31 and a grommet 32 fixedly connected to the handle 31, and the grommet 32 may be configured to be deformable such that when the threading member 3 is inserted into the grommet 122, the grommet 32 is deformable into a string shape for insertion into the grommet 122, and when the grommet 32 is inserted into the grommet 122, the grommet 32 is deformable into a ring shape for insertion of a suture. Because anchor 100's size is smaller, and the aperture of threading hole 122 is also smaller, consequently the degree of difficulty of the manual threading of operating personnel is great, can be convenient for operating personnel to pass the suture through threading hole 122 through this setting, improves operation efficiency.

Preferably, anchor 100 may be made of peek material, absorbable composite material, biocomposite material, high performance specialty engineering plastic, stainless steel metal, and titanium metal, among other materials. The operator may select different materials for anchor 100 as desired. Since the implant rod 2 is not implanted in the human bone or soft tissue for a long period of time, the implant rod 2 may be made of a stainless steel material having a low cost.

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. An anchor, comprising:

the anchor body comprises a leading-in section and a connecting section, wherein the leading-in section is used for being inserted into a preset positioning hole, the connecting section is coaxially connected with the leading-in section and is used for being fixed in the positioning hole, a guide groove is formed in the peripheral wall of the anchor body, the guide groove extends out of the peripheral wall of the connecting section, and an included angle is formed between the central line of the guide groove and the central axis of the anchor body.

2. The anchor of claim 1 wherein the guide slot is configured to extend from the peripheral wall of the connecting section to the peripheral wall of the lead-in section.

3. The anchor of claim 1 wherein the guide slot is configured to extend the end face of the lead-in section from the peripheral wall of the connecting section such that the end face of the lead-in section is formed with the opening.

4. The anchor of any one of claims 1 to 3 wherein the lead-in section is configured as a taper, the connecting section is configured as a cylinder, and an external thread is formed on an outer peripheral wall of the connecting section, the external thread including a plurality of single turns of thread formed at intervals.

5. The anchor of claim 4 wherein the connecting section has a threadable hole formed therethrough, the threadable hole not communicating with the guide slot.

6. An anchor inserter device comprising the anchor of claim 5 and an implant rod removably connected to the anchor.

7. The anchor inserter device of claim 6 wherein the implant rod comprises a manipulation section removably connectable to the connecting section of the anchor and a handle section integrally formed with the manipulation section, and a payout reel fixedly connected to the manipulation section or the handle section, the payout reel having an outer diameter dimension greater than an outer diameter dimension of the handle section.

8. The anchor inserter device as claimed in claim 7, wherein one of the operating section of the implant rod and the connecting section of the anchor has a connecting prism formed thereon, and the other has a connecting groove formed thereon for fitting with the connecting prism.

9. The anchor inserter device of claim 7 wherein the payout reel comprises a reel body and a plurality of cinching slots spaced circumferentially along the reel body.

10. An anchor insertion device as claimed in any one of claims 6-9, wherein the anchor insertion device further includes a threading member including a handle and a threader fixedly connected to the handle, the threader being configured to be deformable such that when the threading member is inserted into the threader hole, the threader loop is changed to a threader for insertion into the threader hole and when the threader is inserted into the threader hole, the threader loop is deformable to a loop for insertion of a suture.