Navigation screw placement drilling aiming limiting sleeve

Abstract

The utility model discloses a navigation screw placement drilling aiming limiting sleeve which comprises a sleeve body and an outer ring sleeve rod. The sleeve body can move in the axial direction of the outer ring sleeving rod. An anchoring end is arranged at the front end of the sleeve main body, and two deformation bodies are symmetrically arranged on the peripheral side of the anchoring end; a loop bar sliding channel is formed in one side of the front end of the outer loop bar; when the sleeve body moves towards one side of the rear end in the axial direction of the outer ring sleeving rod, the deformation body is contained in the sleeving rod sliding channel. When the sleeve body moves towards one side of the front end in the axial direction of the outer ring sleeving rod, the deformation body extends out of the sleeving rod sliding channel and bends towards the outer side to form a supporting part. The deformation body capable of extending out is arranged at the front end of the sleeve body of the limiting sleeve, the deformation body can be released by the needed length after extending out to clamp a backbone, sliding during drilling operation is prevented, stability of drilling operation is guaranteed, and the limiting sleeve can provide convenience for positioning of the anchoring end and prevent drilling deviation or displacement during drilling.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a navigation nail placement, drilling, aiming and limiting sleeve. Background Art

[0002] Computer-assisted navigation systems are increasingly being used in total knee arthroplasty for their advantages in improving the accuracy of soft tissue alignment and balance during total knee arthroplasty. However, surgeons should also be aware of the potential complications associated with navigation systems. Pin-track position-induced fractures are a rare finding in computer-assisted navigation TKA and are associated with a variety of factors, including obesity, trauma, imbalanced alignment, malposition of components, osteoporosis, and malposition of the pin track. Distraction devices need to be fixed to the femur or tibia with screws, which may lead to weakened bone biomechanics and induce pin-site fractures.

[0003] Furthermore, the origin of pin fractures is often low-energy trauma associated with changes in the biomechanical strength of the bone. After cortical bone drilling, the bending strength was reduced by 40.37% compared to before. In addition, torsional failure caused by cross-sectional shear stress in canine femurs has been evaluated. The torsional strength of the bone was significantly reduced when a pin hole was present, and the energy absorption capacity was reduced by 55%. In addition, the size of the pin hole also affects the strength of the bone. Previous studies have shown that cortical defects of 20% of the bone diameter significantly weaken the strength of the bone. In addition, an increase in the number of drill holes also increases the risk of fracture. The importance of accurate pin insertion position has been emphasized. The risks of transcortical drilling include bone defects and thermal necrosis of the bone, which prolongs the healing time and weakens the strength of the bone.

[0004] Therefore, modifying the tracker system to accurately locate the insertion site and reducing the needle diameter or number of needles would be beneficial to patients and prevent fractures at the needle site. Utility Model Content

[0005] The utility model aims to provide a navigation pin placement drilling aiming limit sleeve, which solves the problem that the existing navigation pin placement drilling sleeve is unstable during drilling and easily slides, resulting in eccentric drilling, which may cause serious pin tract fracture.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model discloses a navigation nail placement drilling aiming limit sleeve, the limit sleeve comprising:

[0008] Sleeve body;

[0009] An outer ring rod sleeved on the outside of the sleeve body;

[0010] The sleeve body can move along the axial direction of the outer ring rod;

[0011] The front end of the sleeve body has an anchoring end, and the outer peripheral side of the anchoring end is symmetrically provided with two deformation bodies;

[0012] A sleeve rod sliding channel is provided on one side of the front end of the outer ring sleeve rod;

[0013] When the sleeve body moves toward the rear end along the axial direction of the outer ring sleeve rod, the deformation body is received in the sleeve rod sliding channel;

[0014] When the sleeve body moves toward the front end along the axial direction of the outer ring sleeve rod, the deformable body extends out of the sleeve rod sliding channel and bends toward the outside to form a supporting portion.

[0015] Furthermore, the sleeve body comprises:

[0016] Main body;

[0017] a gripping end formed at the rear end of the main body; and

[0018] The anchoring end and the deforming body are formed at the front end of the main body;

[0019] The material of the deformation body is memory deformation metal material.

[0020] Furthermore, the outer ring rod comprises:

[0021] a sleeve rod ring near the gripping end of the sleeve body;

[0022] two sleeve rods connected to the sleeve rod ring and symmetrically arranged along the circumference of the sleeve rod ring; and

[0023] The sleeve rod sliding channel is formed at the front end of the sleeve rod.

[0024] Furthermore, an exhaust pressure relief hole penetrating through the main body is provided on the main body of the sleeve body;

[0025] The arrangement direction of the two sleeve rods is perpendicular to the opening direction of the exhaust pressure reducing hole.

[0026] Furthermore, a one-way locking assembly is provided at the connection between the sleeve body and the outer ring rod;

[0027] After the sleeve body moves along the axial direction of the outer ring rod, the relative position with the outer ring rod is locked by the one-way locking assembly.

[0028] Furthermore, the one-way locking assembly includes:

[0029] A one-way locking track provided on the main body of the sleeve body, wherein the one-way locking track is provided with a sawtooth groove; and

[0030] A locking assembly disposed on the rod ring;

[0031] The locking assembly comprises:

[0032] An operating rod connected to the sleeve rod ring via a connecting rod, wherein the connection between the operating rod and the connecting rod is connected via a rotating shaft, and the operating rod can rotate relative to the connecting rod;

[0033] A limiting portion located at one end of the operating rod close to the one-way locking track and extending toward the sawtooth groove of the one-way locking track;

[0034] A spring is connected between one end of the operating rod away from the one-way locking track and the rod sleeve ring.

[0035] Furthermore, the limiting portion is configured as a structure in which a side toward the front end of the sleeve body is an inclined surface, and a side toward the rear end of the sleeve body is a vertical surface.

[0036] In the above technical solution, the utility model provides a navigation nail drilling aiming and limiting sleeve, which has the following beneficial effects:

[0037] The front end of the sleeve body of the limiting sleeve of the utility model is provided with a deformable body that can be extended. After the deformable body is extended to a required length, it can clamp the backbone to prevent sliding during drilling operation and ensure the stability of the drilling operation. The limiting sleeve can facilitate the positioning of the anchoring end and prevent drilling deviation or displacement during drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. It is obvious that the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0039] Figure 1 This is a structural schematic diagram of a navigation nail placement, drilling, aiming and limiting sleeve disclosed in an embodiment of the utility model;

[0040] Figure 2 The utility model is a schematic structural diagram of a one-way locking component of a navigation nail placement, drilling, aiming and limiting sleeve disclosed in an embodiment of the utility model.

[0041] Description of reference numerals:

[0042] 1. Sleeve body; 2. Outer sleeve rod; 3. One-way locking assembly;

[0043] 101, main body; 102, gripping end; 103, anchoring end; 104, deformation body; 105, exhaust pressure relief hole;

[0044] 201, sleeve rod ring; 202, sleeve rod; 203, sleeve rod sliding channel;

[0045] 301, one-way locking track; 302, operating rod; 303, rotating shaft; 304, limiting part; 305, spring. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0047] See also Figure 1 to Figure 2 As shown;

[0048] A navigation nail placement, drilling, aiming and limiting sleeve of this embodiment includes:

[0049] Sleeve body 1;

[0050] An outer ring rod 2 is sleeved outside the sleeve body 1;

[0051] The sleeve body 1 can move along the axial direction of the outer ring rod 2;

[0052] The front end of the sleeve body 1 has an anchor end 103, and two deformation bodies 104 are symmetrically arranged on the outer peripheral side of the anchor end 103;

[0053] The front end of the outer ring sleeve rod 2 is provided with a sleeve rod sliding channel 203;

[0054] When the sleeve body 1 moves toward the rear end along the axial direction of the outer ring sleeve rod 2, the deformation body 104 is received in the sleeve rod sliding channel 203;

[0055] When the sleeve body 1 moves toward the front end along the axial direction of the outer ring sleeve rod 2, the deformation body 104 extends out of the sleeve rod sliding channel 203 and bends toward the outside to form a supporting portion.

[0056] Specifically, the present embodiment discloses a limit sleeve capable of limiting the drilling position of the sleeve when drilling and measuring operations are performed; the limit sleeve comprises a sleeve body 1 and an outer ring sleeve rod 2, wherein the outer ring sleeve rod 2 is sleeved outside the sleeve body 1, and the sleeve body 1 of the present embodiment can move along the axial direction of the outer ring sleeve rod 2. In order to ensure that the anchor end 103 at the front end of the sleeve body 1 does not slide relative to the backbone during actual operation and to ensure that the drilling position is more accurate, the front end of the sleeve body 1 of the present embodiment is provided with a deformation body 104 that can be extended and stored by movement. When stored, the deformation body 104 is stored in the sleeve rod sliding channel 203 of the outer ring sleeve rod 2, and when extended, it extends outward, and because it can be deformed and bent, it forms two symmetrically arranged positioning claws, and when contacting the backbone, after the deformation body contacts the backbone, it can be slightly rotated to determine whether it is in the center position of the backbone through the displacement and rotation during rotation, thereby achieving the function of auxiliary positioning.

[0057] The limiting sleeve of this embodiment has two functions, one is the function of measuring the drilling depth, and the other is the function of drilling;

[0058] In the first measurement function, the measuring needle can be inserted along the sleeve body 1. When the measured size is the maximum value, it means that the drilling position is appropriate and the bone screw can be inserted there.

[0059] The second drilling function is to adjust and maintain the position of the anchor end through the above-mentioned deformation body 104 so that it is basically in the center of the backbone, and then guide the drill rod through the internal channel of the sleeve body 1 toward the backbone to perform drilling operations on the designated position of the backbone.

[0060] Preferably, the sleeve body 1 of this embodiment includes:

[0061] Main body 101;

[0062] A gripping end 102 formed at the rear end of the main body 101; and

[0063] An anchoring end 103 and a deformation body 104 formed at the front end of the main body 101;

[0064] Preferably, the material of the deformation body 104 of this embodiment is a memory deformation metal material.

[0065] First, this embodiment further defines the structure of the sleeve body 1, which is an integrally formed structure and mainly includes a main body 101, a gripping end 102, an anchoring end 103 and a retractable deformation body 104.

[0066] Preferably, the outer ring rod 2 of this embodiment comprises:

[0067] A sleeve rod ring 201 close to the gripping end of the sleeve body 1;

[0068] Two sleeve rods 202 connected to the sleeve rod ring 201 and symmetrically arranged along the circumference of the sleeve rod ring 201; and

[0069] A sleeve rod sliding channel 203 is formed at the front end of the sleeve rod 202 .

[0070] This embodiment further defines the structure of the outer ring rod 2, which includes a rod ring 201 and a rod 202. The rod ring 201 and the rod 202 are mainly used to form a connection and movement guide for the internal sleeve body 1. At the same time, a rod sliding channel 203 capable of accommodating the deformation body 104 is also provided at the front end. As the sleeve body 1 moves forward and backward, the deformation body 104 will be guided out of or into the rod sliding channel 203.

[0071] Preferably, an exhaust pressure relief hole 105 penetrating the main body 101 is opened on the main body 101 of the sleeve body 1 of this embodiment; the arrangement direction of the two sleeve rods 202 is perpendicular to the opening direction of the exhaust pressure relief hole 105 .

[0072] Preferably, in order to limit the relative position of the sleeve body 1 with the outer ring rod 2 after adjusting the sleeve body 1, a one-way locking component 3 is provided at the connection between the sleeve body 1 and the outer ring rod 2 of this embodiment;

[0073] Specifically:

[0074] After the sleeve body 1 moves along the axial direction of the outer ring rod 2 , the relative position with the outer ring rod 2 is locked by the one-way locking assembly 3 .

[0075] As a preferred embodiment, the one-way locking assembly 3 of this embodiment includes:

[0076] A one-way locking track 301 provided on the main body 101 of the sleeve body 1, wherein the one-way locking track 301 is provided with a sawtooth groove; and

[0077] A locking assembly disposed on the rod ring 201;

[0078] The locking assembly includes:

[0079] An operating rod 302 connected to the rod ring 201 via a connecting rod, wherein the connection between the operating rod 302 and the connecting rod is connected via a rotating shaft 303, and the operating rod 302 can rotate relative to the connecting rod;

[0080] A limiting portion 304 located at one end of the operating rod 302 close to the one-way locking track 301 and extending toward the sawtooth groove of the one-way locking track 301;

[0081] A spring 305 is connected between one end of the operating rod 302 away from the one-way locking track 301 and the rod ring 201 .

[0082] In order to realize the one-way locking function, the limiting portion 304 of this embodiment is configured as a structure with an inclined surface toward the front end of the sleeve body 1 and a vertical surface toward the rear end of the sleeve body 1 .

[0083] The one-way locking component 3 of this embodiment can prevent the sleeve body 1 from moving toward the rear end by itself by utilizing the cooperation of the locking component and the one-way locking track 301, specifically the cooperation of the serrated groove and the limiting portion 304, after the sleeve body 1 is extended forward, thereby maintaining the proper extended length. The locking component of this embodiment also has a flippable operating rod 302. When the operation is completed, the operating rod 302 can be flipped so that the limiting portion is disengaged from the serrated groove, so that the sleeve body 1 can return to its original position and the deformation portion 104 can be stored in the sleeve rod sliding channel 203.

[0084] In the above technical solution, the utility model provides a navigation nail drilling aiming and limiting sleeve, which has the following beneficial effects:

[0085] The front end of the sleeve body 1 of the limiting sleeve of the utility model is provided with an extendable deformation body 104. After the deformation body 104 is extended to a required length, it can clamp the backbone to prevent sliding during drilling operation and ensure the stability of the drilling operation. The limiting sleeve can facilitate the positioning of the anchoring end 103 and prevent drilling deviation or displacement during drilling.

[0086] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A navigation nail drilling aiming and limiting sleeve, characterized in that: The limiting sleeve comprises: Sleeve body (1); An outer sleeve rod (2) sleeved outside the sleeve body (1); The sleeve body (1) is capable of moving along the axial direction of the outer ring rod (2); The front end of the sleeve body (1) has an anchor end (103), and the outer peripheral side of the anchor end (103) is symmetrically provided with two deformation bodies (104); A sleeve rod sliding channel (203) is provided on one side of the front end of the outer ring sleeve rod (2); When the sleeve body (1) moves along the axial direction of the outer ring sleeve rod (2) toward the rear end, the deformation body (104) is received in the sleeve rod sliding channel (203); When the sleeve body (1) moves toward the front end along the axial direction of the outer ring sleeve rod (2), the deformation body (104) extends out of the sleeve rod sliding channel (203) and bends toward the outside to form a support portion.

2. A navigation nail placement drilling aiming and limiting sleeve according to claim 1, characterized in that: The sleeve body (1) comprises: A main body (101); a gripping end (102) formed at the rear end of the main body (101); and The anchoring end (103) and the deformation body (104) are formed at the front end of the main body (101); The material of the deformation body (104) is a memory deformation metal material.

3. A navigation nail placement drilling aiming and limiting sleeve according to claim 2, characterized in that: The outer ring rod (2) comprises: A sleeve rod ring (201) located close to one end of the gripping end (102) of the sleeve body (1); two sleeve rods (202) connected to the sleeve rod ring (201) and symmetrically arranged along the circumference of the sleeve rod ring (201); and The sleeve rod sliding channel (203) is formed at the front end of the sleeve rod (202).

4. A navigation nail placement drilling aiming and limiting sleeve according to claim 3, characterized in that: The main body (101) of the sleeve body (1) is provided with an exhaust pressure relief hole (105) penetrating the main body (101); The arrangement direction of the two sleeve rods (202) is perpendicular to the opening direction of the exhaust pressure reducing hole (105).

5. The navigation nail placement drilling aiming and limiting sleeve according to claim 3 is characterized in that: A one-way locking component (3) is provided at the connection between the sleeve body (1) and the outer ring rod (2); After the sleeve body (1) moves along the axial direction of the outer ring rod (2), the relative position between the sleeve body (1) and the outer ring rod (2) is locked by the one-way locking assembly (3).

6. A navigation nail placement drilling aiming and limiting sleeve according to claim 5, characterized in that: The one-way locking assembly (3) comprises: A one-way locking track (301) is arranged on the main body (101) of the sleeve body (1), and the one-way locking track (301) is provided with a sawtooth groove; and A locking assembly arranged on the rod ring (201); The locking assembly comprises: An operating rod (302) connected to the rod ring (201) via a connecting rod, wherein the connection between the operating rod (302) and the connecting rod is connected via a rotating shaft (303), and the operating rod (302) can rotate relative to the connecting rod; A limiting portion (304) located at one end of the operating rod (302) close to the one-way locking track (301) and extending toward the sawtooth groove of the one-way locking track (301); A spring (305) is connected between one end of the operating rod (302) away from the one-way locking track (301) and the rod sleeve ring (201).

7. The navigation nail placement drilling aiming and limiting sleeve according to claim 6 is characterized in that: The limiting portion (304) is configured as a structure having an inclined surface on one side facing the front end of the sleeve body (1) and a vertical surface on one side facing the rear end of the sleeve body (1).

Images