Full suture anchor inserterTechnical Field
The utility model belongs to the technical field of medical instruments for implanting full-suture anchors, and particularly relates to a full-suture anchor inserter.
Background
In recent years, the technology of a wire anchor using titanium alloy, PEEK and polylactic acid materials as materials is widely used for repairing injuries at the joint of soft tissues and bone tissues, such as: rotator cuff injury, labrum injury, proximal femur tendon injury, anterior and posterior labrum injury on the shoulder joint, collateral ulnar ligament injury reconstruction, distal biceps brachii tendon injury, inter-navicular ligament repair, triangular fibrocartilage repair, extensor tendon injury repair, and the like. The hard anchor is screwed on bone tissue near the fixing part, the preloaded suture on the anchor passes through the soft tissue to be repaired, and the soft tissue is fixed in contact with the surface of the bone tissue by binding and tightening the suture, so that the physical repair of the damaged tissue is completed.
As hard material anchor technology is increasingly applied, hard material anchors are known to suffer from a number of drawbacks: the titanium alloy metal anchor is easy to generate inflammation due to rejection reaction after being implanted, so that bone dissolution occurs at the implantation position, the anchor is caused to be loosened and shifted, and the fixation is caused to fail. The PLA absorbable anchor can be degraded and broken too early after being implanted, the fixation firmness is reduced due to secondary anchor displacement, and the degradation product can cause problems such as synovitis, osteolysis and the like. Although the anchor with the wire made of PEEK solves the problems of easy loosening, displacement and the like after the implantation of the anchor made of the PEEK, also solves the problems of rupture or premature degradation after the implantation of the anchor made of absorbable materials, the problem that the fixation firmness is reduced due to secondary displacement, synovitis and osteolysis are easily caused by degradation products, but the problems of larger bone canal at the implantation position of the anchor, larger bone removal amount, easy occurrence of fracture or bone rupture and the like still exist. In addition, once the hard anchor is detached from the bone canal after implantation, the hard anchor can cause damage to nearby joint tissues and bone surfaces; the repair of the hard anchors is not only very difficult but also causes great pain to the patient.
In order to solve the problems of hard anchors, full suture anchor products have emerged. The anchor portion of the product is made of a material that can be used to make a suture. The tool for implanting the full suture anchor into the human bone is called an inserter. Most current full suture anchor inserters can only implant one anchor at a time and require pre-perforation prior to each implant, which not only increases the complexity of the procedure during surgery, but also increases the number of surgical steps.
Disclosure of utility model
In view of the above technical problems, the present utility model provides a full-suture anchor inserter, which has two insertion rods, into which two full-suture anchor implants can be inserted at one time, and the distal ends of the insertion rods are designed to be self-tapping ends in the form of bullet heads, without pre-punching holes in bones, and the insertion rods are punched while inserting full-suture anchors, thereby simplifying the operation steps.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
The full-suture anchor inserter comprises a handle and two insertion rods, wherein the two insertion rods are arranged at an angle, each insertion rod comprises a self-tapping section and a torsion section, the proximal end of the self-tapping section is fixedly connected with the distal end of the torsion section, and the proximal end of the torsion section is fixedly connected with the handle;
The self-tapping section comprises a shrinkage part, a step positioning part and a self-tapping end which are sequentially connected from the proximal end to the distal end, the self-tapping end is a bullet, the size of the shrinkage part is smaller than the size of the step positioning part in the direction perpendicular to the axis of the self-tapping section, and the maximum size of the self-tapping end is smaller than the size of the step positioning part;
The self-tapping end is provided with a through groove for assembling the full-suture anchor, the through groove extends to the step positioning part, and the length direction of the through groove coincides with the axial direction of the self-tapping section.
In a preferred embodiment, the constriction is provided with a recess extending in the axial direction.
Further, the number of the concave parts is two, and the two concave parts are parallel surfaces which are parallel to each other.
In a preferred embodiment, the two insertion rods are angled at 0 degrees to each other.
In a preferred embodiment, the bottom of the through groove is arc-shaped.
In a preferred embodiment, the suture of the full suture anchor is detachably connected to the handle, and the free end of the full suture anchor is free from the inserter.
In a preferred embodiment, the handle comprises a first handle and a second handle, and the suture of the full suture anchor is detachably compressed at the junction of the distal ends of the first handle and the second handle.
In a preferred embodiment, a button is arranged on the first handle, an elastic piece is arranged in the second handle, one end of the elastic piece is fixedly connected with the second handle, the other end of the elastic piece is fixedly connected with the button, the button extends along the axial direction of the handle to form an extension part, and the extension part and the first handle press the suture of the full suture anchor through extrusion.
In a preferred embodiment, the distal end of the handle extends along the axial direction of the handle toward the distal end of the insertion rod, and has an extension sleeve with graduations on the surface thereof.
In a preferred embodiment, the material of the insertion rod is titanium alloy, stainless steel or nickel-titanium alloy.
By adopting the technical scheme, the utility model has the following advantages and positive effects compared with the prior art:
The inserter provided by the utility model is provided with two insertion rods, each insertion rod is provided with a self-tapping section, the self-tapping section comprises a self-tapping end, a step positioning part and a contraction part, the self-tapping end is the far end of the insertion rod and is designed into a bullet head, so that the inserter does not need to be pre-drilled, and the full-suture anchor can be directly implanted into bones by knocking the inserter; simultaneously, due to the two insertion rods, two full-suture anchors can be implanted at one time, so that the operation steps are simplified, and the operation time is greatly reduced.
In addition, the self-tapping end, the step positioning part and the shrinkage part are sequentially connected from the far end to the near end along the axial direction of the self-tapping section, the width of the shrinkage part is smaller than that of the step positioning part in the direction of the axis which is horizontally perpendicular to the self-tapping section, the maximum width of the self-tapping end is smaller than that of the step positioning part, namely, the step positioning part with larger size is designed between the self-tapping end and the shrinkage part, so that the time of the insertion rod being knocked into the bone can be buffered, the step positioning part plays a secondary positioning role after the self-tapping end enters the bone, and a developing device is utilized to observe whether the insertion rod enters a preset position; in addition, the size of the step positioning part is larger than that of the contraction part, so that after the full-suture anchor is assembled by the insertion rod, the sizes of the step positioning part and the contraction part can be kept consistent except for the self-tapping end position, and the full-suture anchor is easily brought into bones by the insertion rod.
Drawings
FIG. 1 is a schematic view of an interposer according to an embodiment of the present utility model;
FIG. 2 is a front view of an inserter according to an embodiment of the present utility model;
FIG. 3 is a cross-sectional view of A-A of FIG. 2;
FIG. 4 is an enlarged schematic view of the distal end portion of the insertion rod of the inserter of an embodiment of the present utility model;
Fig. 5 is an enlarged schematic view of the distal end of the insertion rod after assembly of the inserter with a full suture anchor according to embodiments of the present utility model.
Reference numerals illustrate: 1-a handle; 101-a first handle; 102-a second handle; 2-inserting a rod; 21-torsion section; 22-self-tapping section; 221-self-tapping end; 222-step positioning portion; 223-constriction; 3-grooves; 4-buttons; 5-extension; 6-elastic members; 7-extending the sleeve; 8-scale; 9-full suture anchor; 10-concave part, 11-through groove.
Detailed Description
The full suture anchor inserter according to the present utility model is described in further detail below with reference to the drawings and detailed description. The advantages and features of the present utility model will become more apparent from the following description.
In the description of the present application, "proximal" is the end closer to the operator and "distal" is the end farther from the operator.
Referring to fig. 1-2, a full suture anchor inserter includes a handle 1 and two insertion rods 2, wherein the two insertion rods 2 are disposed at an angle to each other, and in this embodiment, the two insertion rods 2 are disposed at 0 degrees, i.e., in parallel, although the two insertion rods 2 may also be disposed at an acute angle, which is not limited thereto. The design purpose of the mutual angles of the insertion rods 2 is to adapt to bones of different parts, and the inserter has wide universality.
The insert rod 2 comprises a self-tapping section 22 and a torsion section 21, wherein the torsion section 21 is used for transmitting torsion and knocking acting force of an operator, the proximal end of the self-tapping section 22 is fixedly connected with the distal end of the torsion section 21, the axes of the self-tapping section 22 and the torsion section are coincident, preferably, the insert rod 2 is made of titanium alloy, stainless steel or nickel-titanium alloy, the self-tapping section 22 and the torsion section 21 are integrally formed, the inserter is prevented from deforming in the implantation process, the proximal end of the torsion section 21 is fixedly connected with the handle 1, the proximal end of the torsion section 21 can be fixedly connected with the handle 1 in a mode of injection molding, assembly or bonding, and the torsion section 21 can be cylindrical, round table, triangular prism, quadrangular prism and the like. Preferably, the torsion section 21 is cylindrical or frustoconical. When the torsion section 21 is cylindrical or truncated cone, the proximal end of the shrinkage portion 223 and the distal end of the self-tapping section 22 are smoothly transited, and the shrinkage portion 223 and the torsion section 21 can be smoothly connected together, so that the acting force is dispersed more uniformly.
Referring specifically to fig. 4-5, the self-tapping section 22 includes a contraction portion 223, a step positioning portion 222, and a self-tapping end 221, which are sequentially connected from the proximal end to the distal end, wherein the self-tapping end 221 is a bullet-shaped, and is used for being crashed into the bone, preferably the diameter of the self-tapping end 221 from the proximal end to the distal end of the self-tapping end 221 is gradually reduced, and a blade is formed, so that the self-tapping section is convenient to be crashed into the bone; in a direction horizontally perpendicular to the axis of the self-tapping section 22, the width of the constricted portion 223 is smaller than the width of the step positioning portion 222, and the maximum width of the self-tapping end 221 is smaller than the width of the step positioning portion 222.
The self-tapping end 221 is provided with a through groove 11 for assembling the full-suture anchor 9, the through groove 11 extends to the step positioning part 222, and the length direction of the through groove 11 is coincident with the axial direction of the self-tapping section 22.
The inserter of this embodiment has two insertion rods 2, each insertion rod 2 having a self-tapping section 22 and a torsion section 21, the torsion section 21 for transmitting the torsion and tapping force of the operator, the self-tapping section 22 for driving into the bone. The self-tapping end 221 is disposed at the distal end of the self-tapping section 22, and the self-tapping end 221 is bullet-shaped, gradually reduces in size from the proximal end of the self-tapping end 221 to the distal end, and forms a blade, so that the inserter is convenient for hole making during the tapping process, and the full-suture anchor 9 can be directly implanted into the bone by tapping the inserter, thereby omitting the step of pre-drilling. The blades are not particularly sharp nor are they sharp or thin needle-like or sheet-like to prevent the blades from bending and kinking during insertion of the inserter or damaging the full suture anchor 9 during use of the inserter. The inserter of this embodiment therefore does not require pre-drilling, and the full-suture anchor 9 can be directly implanted into the bone by tapping the inserter; meanwhile, as the two insertion rods 2 are arranged, the distal ends of the insertion rods 2, namely the self-tapping ends 221 of the self-tapping sections 22, are provided with through grooves 11 for assembling the full-suture anchors 9, and the two full-suture anchors 9 can be implanted at one time. Therefore, the inserter of the embodiment greatly simplifies the operation steps and greatly reduces the operation time.
The self-tapping section 22 includes a self-tapping end 221, a step positioning portion 222 and a shrinkage portion 223, wherein the self-tapping end 221, the step positioning portion 222 and the shrinkage portion 223 are sequentially connected from a distal end to a proximal end along an axial direction of the self-tapping section 22, and in a direction perpendicular to the axial direction of the self-tapping section 22, the size of the shrinkage portion 223 is smaller than that of the step positioning portion 222, the maximum size of the self-tapping end 221 is smaller than that of the step positioning portion 222, namely, the step positioning portion 222 with a larger size is designed between the self-tapping end 221 and the shrinkage portion 223, so that the time of the insertion rod 2 being knocked into bones can be buffered, and the purpose of secondary positioning is achieved. After the self-tapping end 221 enters the bone, the step positioning portion 222 plays a role in positioning, at this time, the developing device is used to again observe whether the insertion rod 2 enters the preset position, if the position of the inserted bone deviates from the preset position, the position needs to be exchanged; in addition, the size of the step positioning part 222 is larger than that of the shrinkage part 223, so that after the insertion rod 2 is assembled with the full-suture anchor 9, the sizes of the step positioning part 222 and the shrinkage part 223 can be kept consistent except for the position of the self-tapping end 221, and the insertion rod 2 can easily bring the full-suture anchor 9 into bones.
The bottom of the through groove 11 is arc-shaped, the through groove 11 is used for clamping the full-suture anchor 9, and the arc-shaped bottom can prevent the self-tapping end 221 from scratching the suture.
The constricted portion 223 is provided with a recess 10 extending in the axial direction. The full-suture anchor 9 is pulled tight at the proximal end of the inserter, the suture of the full-suture anchor 9 is positioned in the recess 10, the proximal end of the inserter is knocked, and the insertion rod 2 easily brings the full-suture anchor 9 into the bone. Further preferably, the number of the concave portions 10 is two, and the two concave portions 10 are parallel surfaces parallel to each other.
In a preferred embodiment, the suture of the full suture anchor 9 is detachably connected to the handle 1, the free end of the full suture anchor 9 being free outside the inserter. If two non-connected full-suture anchors 9 are implanted at the same time, the handle 1 is detachably connected with the suture of the full-suture anchors 9, if the simultaneously implanted full-suture anchors 9 are connected with each other, or the knotted-free full-suture anchors 9 are connected with the handle 1 in a detachable manner, in the implantation process, two hands can be liberated, only the suture of the full-suture anchors 9 is connected with the handle 1, and after implantation, the suture is detached from the handle 1.
Preferably, referring to fig. 3, the handle 1 is designed to conform to the human body mechanics, the handle 1 comprises a first handle 101 and a second handle 102, the first handle 101 and the second handle 102 are in symmetrical shapes, the first handle 101 and the second handle 102 are fixedly connected, and free sutures of the full suture anchor 9 are detachably pressed at the joint of the distal ends of the first handle 101 and the second handle 102.
Preferably, with continued reference to fig. 3, the first handle 101 is provided with a button 4, the second handle 102 is provided with a groove 3, an elastic member 6 is provided in the groove 3, one end of the elastic member 6 is fixedly connected with the second handle 102, the other end is fixedly connected with the button 4, the button 4 extends along the axial direction of the handle 1 to form an extension part 5, and the extension part 5 and the first handle 101 press the free suture of the full suture anchor 9 through extrusion.
The push button 4 is pressed, the elastic piece 6 is compressed, the pressing part drives the extension part 5 to move, so that the extrusion effect of the extension part 5 and the first handle 101 is eliminated, a suture can be clamped into a gap between the extension part 5 and the first handle 101, and the suture can be removed from the gap between the extension part 5 and the first handle 101.
For convenient observation of the depth of insertion of the insertion rod 2 into the bone, the distal end of the handle 1 extends along the axial direction of the handle 1 toward the distal end of the insertion rod 2, and is provided with an extension sleeve 7, and scales 8 are provided on the surface of the extension sleeve 7, although the scales 8 may be provided on the insertion rod 2, and the invention is not limited thereto.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments. Even if various changes are made to the present utility model, it is within the scope of the appended claims and their equivalents to fall within the scope of the utility model.