CN116262065A

CN116262065A - Guiding device

Info

Publication number: CN116262065A
Application number: CN202111539711.2A
Authority: CN
Inventors: 张�浩
Original assignee: Suzhou Minimally Invasive Spinal Trauma Medical Technology Co ltd
Current assignee: Suzhou Minimally Invasive Spinal Trauma Medical Technology Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2023-06-16

Abstract

The invention relates to a guiding device which is used for orthopedic surgery and comprises a handle, an arm assembly, a guider assembly and a guiding structure, wherein the arm assembly comprises a first support arm and a second support arm, and the first ends of the two support arms are detachably connected with the handle; the at least one guide structure is fixedly arranged at the second end of the arm assembly; the guide device assembly comprises two guide devices which are connected with the second end of the support arm; the two guide devices are provided with inner holes which are axially communicated, and the inner holes of the two guide devices are coaxially arranged; at least one guide is movable in the axial direction of the guide structure; thereby the implantation position of the orthopaedics tool can be accurately positioned, and the accuracy of the orthopaedics operation is improved.

Description

Guiding device

Technical Field

The invention belongs to the technical field of medical appliances, and particularly relates to a guiding device for orthopedic surgery.

Background

Clinically, temporary fixation or traction is performed by a Kirschner wire when intra-articular fracture occurs or comminuted fracture occurs. When the Kirschner wire is implanted, a doctor generally drives in the Kirschner wire directly or through a Kirschner wire guide; when the guide is not used, the needle inserting position and the needle extracting position are completely determined by the level of a doctor, and the conditions of non-ideal needle inserting, needle extracting position and angle often occur; when using the director, current pilot positioning is carried out to the kirschner wire through only a director, and in this way, the kirschner wire is implanted through a director on one side of the affected limb, and though the needle inserting position can be determined through the director, the needle extracting position and the needle extracting angle are uncontrollable, so that the implantation position of the kirschner wire cannot be accurately controlled, if the implantation position is not ideal, the implantation operation needs to be repeated for a plurality of times, the operation efficiency is low, and the patient is damaged more. In addition, after the kirschner wire is driven in, the doctor usually needs to see through whether the position of the kirschner wire under the C-arm machine meets the requirements, and when the position of the kirschner wire does not meet the requirements, the kirschner wire needs to be implanted again and the patient needs to see through again, so that more radiation influence is brought to the doctor and the patient. Of course, in addition to kirschner wires, other guiding such as taps, drills, etc. have similar problems.

Therefore, there is a need to provide a novel guiding device for orthopedic surgery, which can more precisely position the implantation direction of an orthopedic tool, improve the accuracy of the orthopedic surgery, and reduce the radiation influence of doctors and patients.

Disclosure of Invention

The invention aims to provide a guiding device which can accurately position the implantation position of an orthopedic tool through two guiding devices, improve the operation efficiency, simplify the operation and reduce the radiation influence of doctors and patients.

In order to achieve the above object, the present invention provides a guide device for use in an orthopedic operation, comprising a handle, an arm assembly, a guide assembly, and a guide structure;

the arm assembly comprises a first support arm and a second support arm, wherein the first end of the first support arm is detachably connected with the handle, and the first end of the second support arm is detachably connected with the handle;

at least one guide structure is fixedly arranged at the second end of the corresponding support arm;

the guide device assembly comprises two guide devices, one guide device is arranged at the second end of the first support arm, and the other guide device is arranged at the second end of the second support arm; the two guide devices are provided with inner holes which are axially penetrated, the inner holes of the two guide devices are coaxially arranged, and at least one guide device can move along the axial direction of the guide structure.

Optionally, the guide structure includes a guide sleeve, the guide sleeve is fixedly arranged at the second end of the corresponding support arm, the guide sleeve is provided with a guide hole which is penetrated axially, the guide device passes through the guide hole, and the guide device can only move axially relative to the guide sleeve, or can move axially and rotate circumferentially relative to the guide sleeve.

Optionally, the guide sleeve is further adapted to limit circumferential rotation of the guide when the guide is only axially movable relative to the guide sleeve, the internal thread of the guide bore cooperating with the external thread of the guide.

Optionally, when the guide can only move relative to the axial direction of the guide sleeve, the guide sleeve is further used for limiting the circumferential rotation of the guide, an inner limiting pin is arranged on the inner wall of the guide hole, an axial groove is arranged on the outer surface of the guide, and the inner limiting pin is matched with the axial groove.

Optionally, a plurality of annular grooves are further arranged on the outer surface of the guide device, and the annular grooves are axially distributed at intervals, and the axial grooves axially penetrate through the annular grooves.

Optionally, the guide device further comprises an adjustment structure for driving the guide to move axially along the guide structure.

Optionally, the guide is in threaded engagement with the adjustment structure, and the guide structure is configured to limit circumferential rotation of the adjustment structure and circumferential rotation of the guide.

Optionally, the internal thread of the adjusting structure is in fit connection with the external thread of the guide; the guide structure comprises two guide sleeves, the two guide sleeves are fixedly arranged on the inner side and the outer side of the second end of the corresponding support arm, the guide sleeves are provided with guide holes which are axially communicated, the adjusting structure is arranged between the two guide sleeves, and the guide device penetrates through the two guide sleeves and the adjusting structure.

Optionally, the guide device further comprises a locking structure for connecting with the movable guide to lock the movable guide and the guide structure.

Optionally, a plurality of annular grooves are arranged on the outer surface of the guide device at intervals in the axial direction, and the locking structure is provided with a clamping end, and the clamping end is used for being matched with any annular groove so as to lock the movable guide device.

Optionally, the guide structure includes the uide bushing, the uide bushing is fixed to be set up at the second end of corresponding support arm, the uide bushing has the guiding hole that the axial is link up, just be provided with on the outer wall of uide bushing with the mounting hole of guiding hole intercommunication, the mounting hole has the internal thread, locking structure's external screw thread with the internal thread fixed connection of mounting hole.

Optionally, at least one of the two guides is provided with a saw tooth structure.

Alternatively, the two guides may be identical or different in structure.

Optionally, the first support arm and/or the second support arm is arc-shaped in the length direction.

Optionally, the handle includes axial connection's handle and external screw thread interface, the first end of first support arm is provided with the internal thread hole, the first end of second support arm is provided with the connecting hole, external screw thread interface respectively with the connecting hole with internal thread hole screw thread fixed connection.

Optionally, a first end of the first support arm is provided with a sunk mounting platform, the mounting platform is provided with the through internal threaded hole, a first end of the second support arm is provided with a concave notch to form a protruding mounting arm, and the mounting arm is provided with the through connecting hole; the mounting arm is disposed on the mounting platform.

The guiding device provided by the invention adopts the two guiding devices to position the implantation direction of the orthopaedics tool such as the Kirschner wire, the tap, the drill bit and the like, and the inner holes of the two guiding devices are coaxially arranged, so that when the orthopaedics tool enters the limb of a patient from one side guiding device, the position of the orthopaedics tool which is driven into the limb of the patient can be determined, and the position of the orthopaedics tool which passes out of the limb of the patient can be determined through the other side guiding device. So configured, on the one hand, the position of driving into the patient's limb and the position and angle of pulling out the patient's limb can be accurately defined by two guides, thereby achieving the purpose of accurately controlling the implantation position of the orthopedic tool, on the other hand, the orthopedic tool can be almost driven into the patient's limb once, the repeated driving times are reduced, the damage to the patient is reduced, the radiation influence to doctors and patients due to repeated driving is also reduced, the operation efficiency is finally improved, and the operation safety is improved.

The guide device provided by the invention can only move one guide device or simultaneously move two guide devices, so that the guide device can be flexibly adjusted according to the body type of a patient, the use position and the size of the injected orthopaedics tool, the application range is wide, and the treatment cost can be reduced. In addition, the two support arms of the guide device provided by the invention are detachably connected through the handle, so that when the guide device is configured, the guide device can be rapidly detached after the orthopedic tool is implanted, and the orthopedic tool does not need to be taken out of the body and then detached, so that the orthopedic operation is more convenient and rapid.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is a schematic diagram of an assembled structure of a first guiding device according to a first embodiment of the present invention;

FIG. 2a is a schematic front view of a handle according to a first embodiment of the present invention;

FIG. 2b is an end view of the handle of FIG. 2 a;

FIG. 3 is a schematic front view of a first arm according to a first embodiment of the present invention, wherein a partial cross-sectional view of the first arm along line A-A and a partial enlarged view of the position B are also shown;

FIG. 4 is a schematic front view of a second arm according to a first embodiment of the present invention, wherein a partial cross-sectional view of the second arm along the line C-C and a partial enlarged view of the position D are also shown;

FIG. 5a is a schematic front view of any one of the guide members according to the first embodiment of the present invention;

FIG. 5b is an end view of the guide of FIG. 5 a;

FIG. 6a is an end view of an adjustment structure according to a first embodiment of the present invention;

FIG. 6b is an axial cross-sectional view of the adjustment structure of FIG. 6 a;

fig. 7a is a schematic front view of a guide sleeve according to a first embodiment of the present invention;

FIG. 7b is an end view of the guide sleeve of FIG. 7 a;

fig. 8 is a schematic diagram of an assembled structure of a second guiding device according to a second embodiment of the present invention;

FIG. 9a is a schematic side view of a first arm according to a second embodiment of the invention;

FIG. 9b is an axial cross-sectional view of the first arm of FIG. 9 a;

FIG. 10a is a schematic side view of a second arm according to a second embodiment of the present invention;

FIG. 10b is an axial cross-sectional view of the second arm of FIG. 10 a;

fig. 11a is a schematic front view of a first guide according to a second embodiment of the present invention;

FIG. 11b is an end view of the first guide of FIG. 11 a;

fig. 12a is a schematic front view of a second guide according to a second embodiment of the present invention;

FIG. 12b is an end view of the second guide of FIG. 12 a;

fig. 13 is a schematic view showing the internal structure of a guide sleeve according to a second embodiment of the present invention;

fig. 14 is a schematic view showing an assembled structure of a third guide device according to a third embodiment of the present invention;

FIG. 15a is a schematic front view of a second guide according to a third embodiment of the present invention, showing a partial enlarged view of the E position;

FIG. 15b is a transverse cross-sectional view of the second guide of FIG. 15 a;

FIG. 16 is an axial cross-sectional view of a guide sleeve according to a third embodiment of the present invention;

fig. 17 is a schematic diagram showing an assembled structure of a fourth guide device according to a fourth embodiment of the present invention;

FIG. 18a is a schematic front view of a second guide according to a fourth embodiment of the present invention, showing a partial enlarged view of the F position;

FIG. 18b is a transverse cross-sectional view of the second guide of FIG. 18 a;

fig. 19a is a schematic front view of a guide sleeve according to a fourth embodiment of the present invention;

FIG. 19b is a transverse cross-sectional view of the guide sleeve of FIG. 19 a;

fig. 20 is a schematic structural view of a locking structure according to a fourth embodiment of the present invention.

Reference numerals are described as follows:

11-a handle; a 111-external threaded interface; 112-handle;

12-a first arm; 121-a first body; 122-an internally threaded bore; 123-a first adjustment mounting slot; 1231-a first inner surface of the first adjustment mounting groove; 1232-a second inner surface of the first adjustment mounting groove; 124-a first guide mounting groove; 125-mounting a platform; 223-guide mounting groove;

13-a second arm; 131-a second body; 132-connecting holes; 133-a second adjustment mounting slot; 1331-a first inner surface of the second adjustment mounting groove; 1332-a second inner surface of the second adjustment mounting groove; 134-second guide mounting groove; 135-mounting arms; 233-a guide mounting groove;

14-a guide; 141-external threads; 142-saw tooth structure; 143-an inner bore of the guide 14;

15-adjusting the structure; 151-internal threads; 152-polish rod segment; 153-thread segments; 154-knob portion;

16-a guide sleeve; 161-an inner bore of the guide sleeve; 162-inner stop pins; 163-mounting holes;

24-a first guide; 241—the inner bore of the first guide; 242-a first saw tooth structure;

25-a second guide; 251-head; 252-external threads; 253-a second saw tooth structure; 254-an inner bore of a second guide; 352-outer groove structure; 3521-annular groove; 3522-axial grooves;

D1-the outer diameter of the external threaded interface; d2—the diameter of the first adjustment mounting groove; d3—diameter of the first guide mounting groove; h-thickness of the mounting arm; d4-diameter of the connecting hole; d5-second adjusting the diameter of the mounting groove; d6—diameter of the second guide mounting groove; d7 diameter of the inner bore of the guide; d8—outer diameter of external thread; d9—adjusting the maximum outer diameter of the structure; d10, D21, D26-diameter of the inner bore of the guide sleeve; d11, D17, D20, D25-outside diameter of the guide sleeve; d12—diameter of guide mounting groove; d13—diameter of guide mounting groove; d14—diameter of the inner bore of the first guide; d15—outer diameter of the first guide; d16, D19, D24-diameter of the inner bore of the second guide; d18, D23-maximum outer diameter of the annular groove; d22-diameter of the inner limit pin; d27-adjusting the diameter of the polish rod section of the structure; the axial length of the L1-externally threaded interface 111; the distance from the center of the L2-internal threaded hole to the inner side of the mounting platform; the distance from the center of the L3-internal threaded hole to the outer side of the mounting platform; the distance from the center of the L4-connecting hole to the outer side of the notch; l5-distance from the center of the connecting hole to the inner side of the notch; l6-width of the annular groove; l7-depth of annular groove; the L8-inner limiting pin protrudes beyond the length of the inner wall of the guide sleeve; l9 is used for adjusting the length of the optical rod of the structure; b1-first adjusting the width of the mounting groove; b2-second adjusting the width of the mounting groove; b3-adjusting the thickness of the structure;

10-a first guiding means; 20-a second guiding means; 30-a third guiding means; 40-fourth guiding means.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings and specific examples. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.

As used in this specification, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. As used in this specification, the term "axial" generally refers to a direction parallel to the axis of the component, "radial" generally refers to a direction perpendicular to the axis of the component, and "circumferential" generally refers to a direction about the axis of the component. The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the invention, unless otherwise indicated, the meaning of "a plurality" is two or more, and the meaning of "a number" is an indefinite number, such as one or more than one.

In order to solve the problem that the existing guide device has poor control on the needle outlet position and angle and the problem that the radiation influence is brought to doctors by repeated perspective under a C-arm machine after the Kirschner wire is implanted, the invention provides a novel guide device which is used for orthopedic surgery and comprises a handle, an arm assembly, a guide device assembly and a guide structure; the arm assembly comprises a first support arm and a second support arm which are oppositely arranged, wherein the first end of the first support arm is detachably connected with the handle, and the first end of the second support arm is detachably connected with the handle;

at least one of the guide structures is fixedly arranged at the second end of the arm assembly; the guide device assembly comprises two guide devices, one guide device is connected with the second end of the first support arm, and the other guide device is connected with the second end of the second support arm; the two guide devices are provided with inner holes which are axially communicated, and the inner holes of the two guide devices are coaxially arranged; at least one guide can move along the axial direction of the guide structure, and the guide structure is used for guiding the moving direction of the guide to ensure the moving precision. So configured, the implant site of the orthopedic tool can be precisely positioned by means of the two guides, reducing the number of repeated implants, reducing trauma to the patient, and also reducing the time and number of exposure of the physician and patient to the radiation environment. When the orthopedic tool is used as a Kirschner wire, a doctor firstly adjusts the positions of the two guide devices outside the body when driving the Kirschner wire, and can determine the needle inlet position, the needle outlet position and the angle after adjusting the positions of the guide devices; the guide device can be adjusted according to the body shape of a patient, the use position and the size of the Kirschner wire, so that the application range is wider; in particular, the Kirschner wire can be detached by detaching the handle after being implanted, and the Kirschner wire does not need to be detached after being taken out, so that the device is more convenient and quick.

The guiding device disclosed by the invention is used for positioning and guiding the orthopedic tool, so that the orthopedic tool can be accurately implanted into a patient, but the types of the orthopedic tool are not limited, for example, the orthopedic tool is not limited to Kirschner wires, and the orthopedic tool can be an orthopedic tool such as a drill, a tap and the like which needs to drill or ream holes in the body or can be a tool for other orthopedic operations.

The two guide devices in the guide device disclosed by the invention can only axially move, and the other guide device is fixed, and can also axially move, so that the adjustment is more flexible and convenient. It will be appreciated that when both guides are movable, both guides move along the respective guide structure. The guide structure disclosed in the invention is used for limiting the moving direction of the guide, and is preferably also used for limiting the circumferential rotation of the guide.

The two guides in the guide device disclosed in the invention can be identical or different in structure. The shape of the two arms in the guide device disclosed by the invention is not limited, and the two arms can be arc-shaped like a C shape, linear shape or broken line shape. The shape of at least one of the two arms disclosed in the invention is preferably an arc shape, such as a 1/4 arc shape, along the length direction of the two arms, because the arc shape has a larger operation space, and the position of the guide can be adjusted more conveniently.

One end of at least one of the two guides in the guide device disclosed by the invention is provided with a saw tooth structure, and the contact force of the guide with bones or soft tissues is increased through the saw tooth structure, so that the guide is less prone to sliding. But the present application does not limit the shape of the saw tooth structure.

The guiding device according to the invention is further described below with reference to the drawings and the preferred embodiments. The following embodiments and features of the embodiments may be complemented or combined with each other without conflict. For simplicity, the orthopaedic tool is assumed in the following description to be a k-wire, and one skilled in the art should be able to modify the following description, with appropriate modifications in detail, for cases other than a k-wire.

Example 1

Fig. 1 shows a first type of guide 10 provided in this embodiment, the first type of guide 10 comprising a handle 11, an arm assembly, a guide assembly and a guide structure. The arm assembly includes a first support arm 12 and a second support arm 13. The guide assembly comprises two guides 14, and since in this example both guides 14 are identical in construction, only one guide 14 is shown schematically. The guide structure includes two guide sleeves 16, and since the two guide sleeves 16 are identical in structure in this example, only one guide sleeve 16 is schematically described. Preferably, the first guiding means further comprises an adjustment structure 15 for driving the guide 14 in axial movement of the guide sleeve 16.

In this example, both guides 14 are movable in the axial direction of the respective guide sleeve 16 under the drive of the adjustment structure 15. Specifically, one guide 14 is moved in the axial direction of one of the guide sleeves 16 by the driving of the first adjustment structure, and the other guide 14 is moved in the axial direction of the other guide sleeve 16 by the driving of the second adjustment structure, and since the first adjustment structure and the second adjustment structure are identical in this example, only one adjustment structure 15 is described as an illustration.

Wherein: the first end of the first arm 12 is detachably connected to the handle 11, and the first end of the second arm 13 is also detachably connected to the handle 11, such as, but not limited to, a threaded connection. One guide sleeve 16 is fixedly arranged at the second end of the first support arm 12, and the other guide sleeve 16 is fixedly arranged at the second end of the second support arm 13. One guide 14 is movably disposed at the second end of the first arm 12 and the other guide 14 is movably disposed at the second end of the second arm 13. Each guide 14 has an axially through bore, the bores of the two guides 14 being coaxially disposed so as to define the needle entry location, needle exit location and angle of the k-wire.

In use, one guide 14 is disposed on one side of the patient's limb and the other guide 14 is disposed on the other side of the patient's limb, the two guides 14 being capable of being moved toward or away from each other simultaneously to adjust the position of the two guides 14. After the positions of the two guides 14 are adjusted, one ends of the two guides 14 are abutted against bones or soft tissues to prevent the two guides 14 from sliding, then the kirschner wire is implanted through the inner hole of the guide 14 on one side, and the needle outlet position and angle of the kirschner wire can be accurately determined by the guide 14 on the other side, so that the disposable implantation of the kirschner wire is realized, and adverse effects caused by multiple implants are avoided.

Fig. 2a shows an exemplary embodiment of the handle 11. As shown in fig. 2a, the handle 11 may comprise an axially connected male connector 111 and a grip 112, the grip 112 having a cross-sectional dimension larger than the outer diameter of the male connector 111.

The male screw interface 111 and the handle 112 may be provided as a unitary or separate structure. If the external screw connection 111 and the handle 112 are separately provided, they may be fixedly connected by a connection method such as welding, riveting, screw thread, etc., and the specific fixed connection method is not limited. The external thread of the external thread interface 111 has no requirement for specification. In this example, the external threaded interface 111 has an external diameter D1 and an axial length L1.

The cross-sectional shape of the handle 112 is not limited, and may be, for example, a non-circular shape such as a quincuncial shape, a hexagonal shape, a square shape, an elliptical shape, or a circular shape. As shown in fig. 2b, in this example, the cross-sectional shape of the handle 112 is quincuncial. Preferably, the outer surface of the handle 112 is subjected to an anti-slip treatment, which may be in one or more of various forms, such as knurling, anti-slip coating, embossing, and the like.

FIG. 3 illustrates an exemplary embodiment of first arm 12. As shown in fig. 3, the first arm 12 includes a first body 121, and the first body 121 is preferably in a circular arc shape, preferably in a 1/4 circular arc shape, along a length direction so as to increase an operation space. The structure of the first body 121 is not limited, and as the first body 121 is generally a rod-shaped structure, such as a circular rod, a flat rod, or a rod of other shape. Of course, in other embodiments, the first body 121 may be a linear type or a polygonal type.

In an example, the first end of the first body 121 along the length direction is provided with an internal threaded hole 122 therethrough, and the internal threaded hole 122 is used for being fixedly connected with the external threaded interface 111 of the handle 11 in a threaded manner. The first support arm 12 is generally of an integral structure, such as an internal threaded hole 122 formed directly on the first body 121, or of course, may be of a split structure, that is, a part with an internal threaded hole 122 is assembled on the first body 121, such as an internal threaded hole 122 formed by inserting a threaded sleeve (such as a wire thread sleeve).

Optionally, the first end of the first arm 12 is provided with a countersunk mounting platform 125, the mounting platform 125 having an internally threaded bore 122 therethrough, the mounting platform 125 being adapted to receive the first end of the second arm 13 so that the two arms are threadably connected by the handle 11. In this example, the distances from the center of the internally threaded hole 122 to the inside and outside of the mounting platform 125 are L2 and L3, respectively. Optionally, the internally threaded bore 122 has a depth of 0.5L1 to increase the strength of the handle mating arms.

In an example, the second end of the first body 121 along the length direction is provided with a first adjustment mounting groove 123 therethrough for assembling the adjustment structure 15. The second end of the first body 121 is opposite to the first end. The first adjustment mounting groove 123 is a generally circular groove having a width B1 and a diameter D2. The first adjustment mounting groove 123 forms an opening on the second end surface of the first body 121, through which at least a part of the outer wall of the adjustment structure 15 can be inserted into the first adjustment mounting groove 123, and the adjustment structure 15 is rotatably disposed in the first adjustment mounting groove 123. In this embodiment, the first adjustment mounting groove 123 has a first inner surface 1231 and a second inner surface 1232 disposed opposite to each other, the opening is formed between the first inner surface 1231 and the second inner surface 1232, and the adjustment structure 15 is located between the first inner surface 1231 and the second inner surface 1232.

In an example, the second end of the first body 121 along the length direction is provided with a first guide mounting groove 124 therethrough for assembling the guide sleeve 16. The first guide mounting groove 124 is a generally circular groove, and the diameter of the first guide mounting groove 124 is D3. The manner of the fixed connection between the guide sleeve 16 and the first arm 12 is not limited, and may be, for example, welded or otherwise connected.

Fig. 4 shows an exemplary embodiment of the second arm 13. As shown in fig. 4, the second arm 13 includes a second body 131, and the second body 131 is preferably in a circular arc shape, more preferably in a 1/4 circular arc shape, along the length direction so as to increase the operation space. The structure of the second body 131 is not limited, and as the second body 131 is generally a rod-shaped structure, such as a circular rod, a flat rod, or a rod of other shape. Of course, in other embodiments, the second body 131 may be a linear type or a polygonal type.

In an example, the second body 131 is provided at a first end in a length direction with a connection hole 132, and the connection hole 132 is used for connection with the external screw interface 111 of the handle 11. The second arm 13 is generally of an integral structure, for example, the connecting hole 132 is directly formed on the second body 131, but may also be of a split structure, that is, a part with the connecting hole 132 is assembled on the second body 131, for example, the connecting hole 132 may be formed by embedding a sleeve.

The connecting hole 132 of the second support arm 13 is coaxially arranged with the internal threaded hole 122 of the first support arm 12 and is arranged up and down. The connecting hole 132 is typically a smooth hole (i.e., without threads), but may also have internal threads. The connecting hole 132 is generally machined directly into the second arm 13 and has a diameter D4. Optionally, the diameter D4 of the connecting hole 132 is slightly larger than the outer diameter D1 of the externally threaded interface 111. In this example, the distances from the center of the connecting hole 132 to the inner side and the outer side of the notch are L4 and L5, respectively, where L4 is less than or equal to L2, L5 is greater than or equal to L3, preferably L4 is slightly less than L2, and L5 is slightly greater than L3, so as to reduce the assembly difficulty.

In one example, the first end of the second arm 13 is provided with a concave notch (not shown) for avoiding the mounting platform 125 of the first arm 12, and a portion of the first end of the second arm 13 where the notch is not formed forms a protruding mounting arm 135. The mounting arm 135 has a through connection hole 132. The mounting arm 135 has a thickness H that is less than the axial length L1 of the male threaded interface 111, typically H0.5L1, to increase the strength of the handle mating arm.

In an example, a second end of the second body 131 along the length direction is provided with a second adjustment mounting groove 133 therethrough for assembling the adjustment structure 15. The second adjusting and mounting groove 133 is a generally circular groove, the width of which is B2, B2 may be the same as or different from the width B1 of the first adjusting and mounting groove 123, the diameter of the second adjusting and mounting groove 133 is D5, and the diameter D5 may be the same as or different from the diameter D2 of the first adjusting and mounting groove 123.

In the present embodiment, the diameter D5 of the second adjustment installation groove 133 is the same as the diameter D2 of the first adjustment installation groove 123, and the width B2 of the second adjustment installation groove 133 is the same as the width B1 of the first adjustment installation groove 123. Similarly, the second adjustment mounting groove 133 forms an opening on the second end surface of the second body 131, through which at least a part of the outer wall of the adjustment structure 15 can be inserted into the second adjustment mounting groove 133, and the adjustment structure 15 is rotatably disposed in the second adjustment mounting groove 133. In this embodiment, the second adjustment mounting groove 133 has a first inner surface 1331 and a second inner surface 1332 disposed opposite to each other, an opening is formed between the first inner surface 1331 and the second inner surface 1332 of the second adjustment mounting groove 133, and the other adjustment structure 15 is located between the first inner surface 1231 and the second inner surface 1232 of the second adjustment mounting groove 133.

In an example, a second end of the second body 131 along the length direction is provided with a second guide mounting groove 134 therethrough for assembling another guide sleeve 16. The second guide mounting groove 134 is a generally circular groove, and the diameter D6 of the second guide mounting groove 134 may be the same as or different from the diameter D3 of the first guide mounting groove 124. In the present embodiment, the diameter D6 of the second guide mounting groove 134 is the same as the diameter D3 of the first guide mounting groove 124. The guide sleeve 16 is fixedly connected with the second support arm 13, and the fixed connection mode is not limited, for example, the fixed connection mode can be a welding mode or the like.

In this embodiment, one guide 14 is movable along one guide sleeve 16 provided on the first arm 12 and the other guide 14 is movable along the other guide sleeve 16 provided on the second arm 12. Each guide sleeve 16 has a guide hole that is axially therethrough, through which the guide 14 passes, so that the guide 14 can move axially with respect to the guide sleeve 16 or can also rotate circumferentially while moving axially with respect to the guide sleeve 16. The guide sleeve 16 also serves to limit circumferential rotation of the guide 14, such as when the guide 14 is only axially movable relative to the guide sleeve 16.

Referring to FIG. 1, in one embodiment, a portion of the outer wall of one guide sleeve 16 is fixedly disposed within a first guide mounting slot 124 of the first arm 12, preferably the first guide mounting slot 124 is disposed coaxially with the guide sleeve 16, and a portion of the outer wall of the other guide sleeve 16 is fixedly disposed within a second guide mounting slot 134 of the second arm 13, preferably the second guide mounting slot 134 is disposed coaxially with the guide sleeve 16.

Fig. 5a and 5b illustrate an exemplary embodiment of the guide 14. As shown in fig. 5a and 5b, the guide 14 has an external thread 141, and the external thread 141 has an outer diameter D8. Further, the guide 14 further includes a serration structure 142 provided at an end surface of one end of the external thread 141, the serration structure 142 having serration uniformly or unevenly distributed, the serration being distributed in a circumferential direction of the inner hole 143 of the guide 14, and a shape of the serration being not limited. The guide 14 has an inner hole 143 that penetrates axially, the inner hole 143 of the guide 14 is usually a round hole, and the diameter of the inner hole 143 of the guide 14 is D7, and D7 is slightly larger than the k needle. As required clinically, D7 is generally 1.0-10.0 mm.

In this example, the external threads 141 of the guide 14 mate with the internal threads of the guide sleeve 16 and limit circumferential rotation of the guide 14 by the guide sleeve 16.

Fig. 6a and 6b show an exemplary embodiment of the adjustment structure 15. As shown in fig. 6a and 6b, the adjustment structure 15 has an internal thread 151 for cooperation with an external thread 141 of the guide 14. The shape of the adjusting structure 15 is not limited, and in this embodiment, the shape of the adjusting structure 15 is an outer hexagonal shape, but may be other shapes, such as a non-circular shape like a quincunx, a square, an oval, or a circular shape. Preferably, the outer surface of the adjusting structure 15 is subjected to an anti-slip treatment, and the anti-slip treatment may be various forms, such as knurling, anti-slip coating, concave-convex treatment, etc.

The thickness of the adjusting structure 15 is B3, and B3 is slightly smaller than the width B1 of the first adjusting installation groove 123 and the width B2 of the second adjusting installation groove, so that the adjusting structure 15 can be smoothly inserted into the first adjusting installation groove 123 or the second adjusting installation groove 133. The maximum outer diameter of the adjustment structure 15 is D9, and D9 is generally slightly smaller than the diameter D2 of the first adjustment mounting groove 123 and the diameter D5 of the second adjustment mounting groove. Preferably, the inner hole of the adjusting structure 15 coincides with the axis of the first adjusting installation groove 123 or the second adjusting installation groove 133. The guide 14 is inserted into the adjustment structure 15 such that the external threads 141 of the guide 14 mate with the internal threads 151 of the adjustment structure 15, thereby driving the guide 14 to move along the guide sleeve 16 by rotating the adjustment structure 15. Since the axial movement of the adjustment structure 15 is limited by the guide sleeve 16, the adjustment structure 15 can only be rotated circumferentially.

Fig. 7a and 7b show an exemplary embodiment of the guide sleeve 16. As shown in fig. 7a and 7b, the guide sleeve 16 has an inner hole 161 passing through axially, the diameter of the inner hole 161 of the guide sleeve 16 is D10, and D10 is slightly larger than the outer diameter D8 of the external thread 141 of the guide 14, so that the guide 14 can smoothly pass through the guide sleeve 16. However, in other embodiments, the guide structure may be implemented by the structure of the support arm itself, that is, the guide structure and the support arm are provided as a single structure.

In use, at least one guide sleeve 16 is provided on each arm, and the inner bore 161 of the guide sleeve 16 is coaxially disposed with the inner bore of the adjustment structure 15 so that the guide 14 is inserted into both the guide sleeve 16 and the adjustment structure 15. The guide sleeve 16 is generally cylindrical in configuration with an outer diameter D11, D11 being generally less than or equal to the diameter D3 of the first guide mounting groove 124 or the diameter D6 of the second guide mounting groove 134.

In this example, as shown in fig. 1, one guide sleeve 16 is provided on the inner side and the outer side of the second end of each arm, and the adjustment structure 15 is located between the two guide sleeves 16 so that each guide 14 passes through the two guide sleeves 16 and one adjustment structure 15.

Next, the manner of use of the first guide 10 provided in this embodiment will be further described in connection with the preferred embodiment.

First, the external screw thread interface 111 on the handle 11 is inserted into the connection hole 132 of the second arm 13 and the internal screw thread hole 122 of the first arm 12, thereby fixing the first arm 12 and the second arm 13 together. Secondly, a guiding sleeve 16 is fixedly connected to the first support arm 12 and the second support arm 13, and the guiding sleeve 16 and the support arms are fixed in a welding mode (laser welding, argon arc welding) mode and the like. It should be noted that, during assembly, one side end surface of the guide sleeve 16 must not protrude from the inner surface of the first adjustment mounting groove 123, and of course, does not protrude from the inner surface of the second adjustment mounting groove. As in the present embodiment, 2 guide sleeves 16 are symmetrically disposed on each arm, at this time, the end surface of the guide sleeve 16 on the outer side of the second end of the first arm 12 must not protrude from the first inner surface 1231 of the first adjustment mounting groove 123, the end surface of the guide sleeve 16 on the inner side of the second end of the first arm 12 must not protrude from the second inner surface 1232 of the first adjustment mounting groove 12, and the end surface of the guide sleeve 16 on the outer side of the second end of the second arm 13 must not protrude from the first inner surface 1331 of the second adjustment mounting groove 133, and the end surface of the guide sleeve 16 on the inner side of the second end of the second arm 13 must not protrude from the second inner surface 1332 of the second adjustment mounting groove 133, which would affect the mounting of the adjustment structure 15. Furthermore, an adjusting structure 15 is embedded in each of the first arm 12 and the second arm 13, and the adjusting structure 15 on each arm is placed between the two guide sleeves 16. Finally, on the first arm 12 and the second arm 13, a guide 14 is inserted through the adjustment structure 15 and the guide sleeve 16, respectively, so that the guide 14 is connected to the two arms.

After the assembly process is completed, the guides 14 on the first arm 12 and the second arm 13 are coaxially disposed. When a k-wire is to be implanted, the adjustment structure 15 is rotated (e.g., counter-clockwise) to move the guides 14 on the two arms back along the axis of the guide sleeve 16, and after the adjustment is performed to a suitable distance, the adjustment structure 15 is rotated in a reverse direction to move the guides 14 on the two arms back along the axis of the guide sleeve 16 until the saw tooth structure 142 of each guide 14 reaches the bone or soft tissue, the rotation of the adjustment structure 15 is stopped, and then the k-wire is implanted through the inner hole 143 of one of the guides 14. After the Kirschner wire is struck, the handle 11 is rotated to release the connection between the two support arms, so that the two support arms can be disassembled, and the Kirschner wire is kept on bones.

< example two >

Fig. 8 shows a second type of guide 20 provided by the present embodiment, the second type of guide 20 comprising a handle 11, an arm assembly, a guide assembly and a guide structure. Unlike the first embodiment, the second guide 20 eliminates the adjustment structure 15 of the first embodiment and only one guide is movable. The following description will mainly be directed to the different points, and for the same parts, reference is made to embodiment one.

As shown in fig. 8, the arm assembly includes a first support arm 12 and a second support arm 13. The guide assembly comprises two guides, a first guide 24 and a second guide 25, one of which is movable and the other of which is stationary. For the sake of simplicity, in the following description it is assumed that the first guide 24 is fixed and the second guide 25 is movable, and a person skilled in the art shall be able to modify the following description, which description is given for the case where the second guide 25 is fixed and the first guide 24 is movable, with appropriate modifications in detail. The guide structure includes a guide sleeve 16. It will be appreciated that the guide sleeve 16 acts as a first guide sleeve when the first guide 24 is movable and that the guide sleeve 16 acts as a second guide sleeve when the second guide 25 is movable.

In this example, the second guide 25 is driven directly and manually along the guide sleeve 16. Specifically, the guide sleeve 16 is fixedly disposed at the second end of the second support arm 13, the guide sleeve 16 has a guide hole penetrating axially, the guide hole of the guide sleeve 16 has an internal thread, the second guide 25 has an external thread, and the external thread of the second guide 25 is matched with the internal thread of the guide hole of the guide sleeve 16, so that the second guide 25 can move axially relative to the guide sleeve 16. Conversely, the external threads of the first guide 24 mate with the internal threads of the guide bore of the guide sleeve 16 to enable axial movement of the first guide 24 relative to the guide sleeve 16.

Wherein the first guide 24 is fixedly arranged at the second end of the first support arm 12, and the second guide 25 is movably arranged at the second end of the second support arm 13; the inner bore of the first guide 24 and the inner bore of the second guide 25 are coaxially arranged to define the needle insertion position, the needle withdrawal position and the angle of the k-wire.

In use, the first guide 24 is disposed on one side of the patient's limb and the second guide 25 is disposed on the other side of the patient's limb, the second guide 25 being able to move away from or towards the first guide 24, thereby adjusting the position of the second guide 25. After the position of the second guide 25 is adjusted, one end of the second guide 25 is abutted against bones or soft tissues to prevent the second guide 25 from sliding, then the kirschner wire is implanted through the inner hole of the guide on one side, and the needle outlet position and angle of the kirschner wire can be accurately determined through the guide on the other side, so that disposable implantation of the kirschner wire is realized, and adverse effects caused by multiple implants are avoided.

Fig. 9a and 9b illustrate an exemplary embodiment of first arm 12. As shown in fig. 9a and 9b, the first arm 12 includes a first body 121, and the first body 121 is preferably in an arc shape, preferably in a 1/4 arc shape, along a length direction. The structure of the first body 121 is not limited, and the first body 121 is generally a rod-shaped structure, such as a circular rod, a flat rod, or a rod of other shape.

In an example, the first end of the first body 121 along the length direction is provided with an internal threaded hole 122 therethrough, and the implementation of the internal threaded hole 122 is the same as that of the first embodiment, and will not be described in detail. It should be understood that the structure of the first end of the first arm 12 connected to the handle 11 in this embodiment is the same as that of the first embodiment, and will not be described in detail.

In an example, the second end of the first body 121 in the length direction is provided with a guide mounting groove 223 therethrough, and the guide mounting groove 223 is used for assembling the first guide 24. The guide mounting groove 223 is a generally circular recess having a diameter D12.

Fig. 10a and 10b show an exemplary embodiment of the second arm 13. As shown in fig. 10a and 10b, the second arm 13 includes a second body 131, and the second body 131 is preferably in a circular arc shape, preferably in a 1/4 circular arc shape, along the length direction. The structure of the second body 131 is not limited, and the second body 131 is generally a rod-shaped structure, such as a circular rod, a flat rod, or a rod of other shape.

In an example, the first end of the second body 131 along the length direction is provided with a connecting hole 132, and the implementation of the connecting hole 132 is the same as that of the first embodiment, which will not be described in detail. It should be understood that the structure of the connection between the first end of the second arm 13 and the handle 11 in this embodiment is the same as that of the first embodiment, and will not be described in detail.

In an example, the second end of the second body 131 along the length direction is provided with a guide mounting groove 233 therethrough for assembling the guide bush 16. The guide mounting groove 233 is a generally circular groove having a diameter D13.

Fig. 11a and 11b show the structure of the first guide 24. As shown in fig. 11a and 11b, the first guide 24 has an inner bore 241 extending axially therethrough. The inner bore 241 of the first guide 24 is generally circular and has a diameter D14. The first guide 24 has a generally cylindrical structure, and the outer diameter D15, D15 is slightly smaller than the diameter D12 of the guide mounting groove 223 of the first arm 12, so that the first guide 24 can be smoothly fitted into the guide mounting groove 223 and coaxially disposed with the guide mounting groove 223. The inner bore diameter D14 of the first guide 24 may be slightly larger than the k-wire size, e.g., D14 is typically 1.0-10.0 mm, depending on clinical requirements. Further, a first serration structure 242 is provided on an end surface of the inner bore 241 of the first guide 24. The first serration structure 242 has uniformly or unevenly distributed serrations distributed in the circumferential direction of the inner hole 241 of the first guide 24, and the shape of the serrations is not limited.

Fig. 12a and 12b show an exemplary embodiment of the second guide 25. As shown in fig. 12a and 12b, the second guide 25 includes a head 251, an external thread 252, and a second serration 253 connected in axial sequence. The head 251 may be fixed to one end of the external thread 252 by welding, screwing, riveting, or the like, or may be provided as an integral structure with the external thread 252. The shape of the head 251 is not limited, and may be a non-circular shape such as a quincunx shape, a hexagonal shape, a square shape, an elliptical shape, or a circular shape. Preferably, the outer surface of the head 251 is subjected to an anti-slip treatment, which may be in various forms, such as knurling, anti-slip coating, embossing, etc. The specifications of the external threads 252 are set as needed. The second guide 25 has an axially extending bore 254, the bore 254 having a diameter D16, D16 being slightly larger than the Kirschner wire size. Typically, D16 is 1.0-10.0 mm according to clinical requirements. The inner diameter D16 of the inner bore 254 of the second guide 25 may be the same as or different from the inner diameter D14 of the inner bore 241 of the first guide, and is generally no greater than D14. The second serration structure 253 has serration uniformly or unevenly distributed, which is distributed in the circumferential direction of the inner hole 254 of the second guide 25, and the shape of the serration is not limited.

Fig. 13 illustrates an exemplary embodiment of the guide sleeve 16. As shown in fig. 13, the guide sleeve 16 has an inner hole 161 that is provided to extend axially therethrough, and the inner hole 161 of the guide sleeve 16 has an internal thread. The inner bore 161 of the guide sleeve 16 mates with the external threads 252 of the second guide 25 and the guide sleeve 16 is fixedly connected to the second arm 13. The outer diameter D17 of the guide sleeve 16 is generally slightly smaller than the diameter D13 of the guide mounting groove 233.

Next, the manner in which the second guide 20 of the present embodiment is used will be further described with reference to the preferred embodiment.

First, the external screw thread interface 111 of the handle 11 is passed through the connection hole 132 of the second arm 13 and the internal screw thread hole 122 of the first arm 12, and in this way, the first arm 12 and the second arm 13 are fixed together. Next, the first guide 24 is fixed to the second end of the first arm 12, for example, by welding (e.g., laser welding, argon arc welding), and the guide sleeve 16 is fixed to the second end of the second arm 13, for example, by welding (e.g., laser welding, argon arc welding), and the second guide 25 is inserted into the guide sleeve 16, and the second guide 25 is screw-fitted with the guide sleeve 16.

After the above-described assembly process is completed, the inner bore 241 of the first guide 24 is disposed coaxially with the inner bore 254 of the second guide 25. When a k-wire is to be implanted, the head 251 of the second guide 25 is operable to rotate the second guide 25 axially away from the first guide 24, after adjustment to a suitable distance, the first guide 24 is secured to the bone or soft tissue by the first saw tooth structure 142, and the second guide 25 is rotated in the opposite direction to axially approximate the second guide 25 to the first guide 24, and the rotation of the second guide 25 is stopped when the second saw tooth structure 253 reaches the bone or soft tissue. A k-wire is then implanted through the bore 254 of the second guide 25. After the Kirschner wire is struck, the handle 11 is rotated to release the connection between the two support arms, so that the two support arms can be disassembled, and the Kirschner wire is exposed on bones.

Example III

Referring to fig. 14, there is shown a third guide 30 provided in the present embodiment, the third guide 30 including a handle 11, an arm assembly, a guide assembly and a guide structure. The difference from the second embodiment is that the second guide 25 in the third guide 30 is different in structure. The following description will mainly be directed to the different points, and for the same parts, reference is made to the second embodiment.

As shown in fig. 14, the arm assembly includes a first support arm 12 and a second support arm 13; the guide assembly comprises a first guide 24 and a second guide 25, one of which is movable and the other stationary. For the sake of simplicity, in the following description it is assumed that the first guide 24 is fixed and the second guide 25 is movable, and a person skilled in the art shall be able to modify the following description, which description is given for the case where the second guide 25 is fixed and the first guide 24 is movable, with appropriate modifications in detail. The guide structure includes a guide sleeve 16. It will be appreciated that the guide sleeve 16 acts as a first guide sleeve when the first guide 24 is movable and that the guide sleeve 16 acts as a second guide sleeve when the second guide 25 is movable.

In this example, the second guide 25 may be directly and manually driven to move in the axial direction of the guide sleeve 16. However, in the second embodiment, the second guide 25 is engaged with the internal thread of the guide sleeve 16 by the external thread 252 so that the second guide 25 is axially moved only with respect to the guide sleeve 16, whereas in the third embodiment, the second guide 25 is engaged with the internal stopper pin 162 of the guide sleeve 16 by the external groove structure so that the second guide 25 is axially moved only with respect to the guide sleeve 16.

Referring specifically to fig. 15a and 15b, the second guide 25 has a head 251, an outer groove structure 352 and a second serration structure 253 connected in axial sequence. The head 251 may be fixed to one end of the outer groove structure 352 by welding, screwing, riveting, or the like, or may be provided as an integral structure with the outer groove structure 352. The shape of the head 251 is not limited, and may be a non-circular shape such as a quincunx shape, a hexagonal shape, a square shape, an elliptical shape, or a circular shape. Preferably, the outer surface of the head 251 is subjected to an anti-slip treatment in the form of various kinds of knurling, an anti-slip coating, a concavo-convex treatment, etc.

The outer groove structure 352 is disposed on the outer surface of the second guide 25 and includes an annular groove 3521 and an axial groove 3522, the axial groove 3522 extending axially through the annular groove 3521. The annular grooves 3521 are plural and are axially spaced, the maximum outer diameter of the annular groove 3521 is D18, the depth of the annular groove 3521 is L7, and the width of the annular groove 3521 is L6.

The plurality of annular grooves 3521 are generally evenly distributed over the stem of the second guide 25. The specific number of the annular grooves 3521 is not limited, and is set according to the adjustment distance range, that is, the number of the annular grooves 3521 distributed determines the adjustment distance range, and the minimum distance between the annular grooves 3521 determines the minimum adjustment distance. The axial grooves 3522 extend axially along the shaft portion of the second guide 25, and the number of axial grooves 3522 is generally plural, such as 2 or 4 axial grooves 3522, and the plurality of axial grooves 3522 are circumferentially spaced apart and generally symmetrically distributed. In this example, the number of axial grooves 3522 is 2. The second saw tooth structures 253 may be uniformly distributed or unevenly distributed, the shape of which is not required. The second guide 25 has an inner bore 254 extending axially therethrough, the diameter of the inner bore 254 of the second guide 25 being D19, D19 being slightly larger than the Kirschner wire size. Typically, D19 is 1.0 to 10.0mm, and D19 is generally not greater than D14, according to clinical requirements.

Fig. 16 shows an embodiment of the guide sleeve 16 of the present embodiment. As shown in fig. 16, the guide sleeve 16 has an inner bore 161 disposed axially therethrough, the inner bore 161 of the guide sleeve 16 mating with the outer groove structure 352 of the second guide 25. The guide sleeve 16 is generally cylindrical in configuration with an outer diameter D20, D20 being slightly smaller than D13. The diameter of the inner bore 161 of the guide sleeve 16 is D21, D21 being slightly larger than D18. In addition, an inner limiting pin 162 protrudes outwards from the inner wall of the inner hole 161 of the guide sleeve 16, and the inner limiting pin 162 may be fixed integrally with the guide sleeve 16 or by welding, riveting, threading, or the like. The number of inner limit pins 162 corresponds to the number of axial grooves 3522 on the second guide 25, i.e. the inner limit pins 162 move along the axial grooves 3522. The diameter of the inner limit pin 162 is D22, the length of the inner hole 161 protruding beyond the guide sleeve is L8, D22 is slightly smaller than L6, and L8 is slightly larger than L7. The circumferential rotation of the second guide 25 can be restricted by the cooperation of the axial groove 3522 with the inner limit pin 162, and the movement of the second guide 25 can be axially guided.

Next, the use of the third guide 30 according to the present embodiment will be further described with reference to the preferred embodiment.

The 111 threaded interface on the handle 11 is first passed through the connecting hole 132 of the second arm 13 and the internally threaded hole 122 of the first arm 12, in such a way that the first arm 12 and the second arm 13 are fixed together. Next, the first guide 24 is fixed to the first end of the first arm 12, for example, by welding (e.g., laser welding, argon arc welding), and the guide sleeve 16 is fixed to the second end of the second arm 13, for example, by welding (e.g., laser welding, argon arc welding), and the second guide 25 is inserted into the guide sleeve 16, and the second guide 25 is axially engaged with the hole of the guide sleeve 16.

After the above-described assembly process is completed, the inner bore 241 of the first guide 24 is disposed coaxially with the inner bore 254 of the second guide 25. When a k-wire is to be implanted, the head 251 of the second guide 25 is operable to rotate the second guide 25 such that the inner stop pin 162 is retained within the axial recess 3522 such that the second guide 25 is axially moveable only within the guide sleeve 16, and the first guide 24 is secured to bone or soft tissue by the first serrations 242, and then the second guide 25 is axially moved such that the second serrations 253 are secured to bone or soft tissue. After the proper distance is adjusted, the second guide 25 is rotated in the opposite direction so that the inner limit pin 162 is limited in the axial groove 3522, and then the k-wire is implanted through the inner hole 254 of the second guide 25. After the Kirschner wire is struck, the handle 11 is rotated to release the connection between the two support arms, so that the two support arms can be disassembled, and the Kirschner wire is exposed on bones.

Example IV

Referring to fig. 17, there is shown a fourth guide 40 provided in the present embodiment, the fourth guide 40 including a handle 11, an arm assembly, a guide assembly and a guide structure. Unlike the third embodiment, the second guide 25 of the fourth guide 40 is structured differently, specifically, the second guide 25 of the present embodiment eliminates the axial groove, and the fourth guide is additionally provided with the adjusting structure 15. The following description will be mainly directed to the different points, and for the same parts, reference is made to embodiment three.

As shown in fig. 17, the arm assembly includes a first support arm 12 and a second support arm 13; the guide assembly comprises a first guide 24 and a second guide 25, one of which is movable and the other stationary. For the sake of simplicity, in the following description it is assumed that the first guide 24 is fixed and the second guide 25 is movable, and a person skilled in the art shall be able to modify the following description, which description is given for the case where the second guide 25 is fixed and the first guide 24 is movable, with appropriate modifications in detail. The guide structure includes a guide sleeve 16. It will be appreciated that the guide sleeve 16 acts as a first guide sleeve when the first guide 24 is movable and that the guide sleeve 16 acts as a second guide sleeve when the second guide 25 is movable.

In this example, the second guide 25 is driven to move in the axial direction of the guide bush 16 by manually driving the adjustment structure 15.

Specifically, referring to fig. 18a and 18b, the second guide 25 has a head 251, an outer groove structure 352 and a second serration structure 253 connected in axial sequence. The head 251 may be fixed to the outer groove structure 352 by welding, screwing, riveting, or the like, or may be provided as an integral structure with the outer groove structure 352. The shape of the head 251 is not limited, and may be a non-circular shape such as a quincunx shape, a hexagonal shape, a square shape, an elliptical shape, or a circular shape. Preferably, the outer surface of the head 251 is subjected to an anti-slip treatment in the form of various kinds of knurling, an anti-slip coating, a concavo-convex treatment, etc.

The outer groove structure 352 includes a plurality of annular grooves 3521 disposed on the outer surface of the stem portion of the second guide 25, the plurality of annular grooves 3521 being generally evenly distributed over the stem portion of the second guide 25. The specific number of the annular grooves 3521 is not limited, and is set according to the adjustment distance range, that is, the number of the annular grooves 3521 distributed determines the adjustment distance range, and the minimum distance between the annular grooves 3521 determines the minimum adjustment distance. The annular groove 3521 has a maximum outer diameter D23, a depth L7, and a width L6. The second saw tooth structures 253 may be uniformly distributed or unevenly distributed, the shape of which is not required. The second guide 25 has an axially extending bore 254, the bore 254 having a diameter D24, D24 being slightly larger than the Kirschner wire size. Typically, D24 is 1.0 to 10.0mm, and D24 is generally not greater than D14, according to clinical requirements.

Fig. 19a and 19b show an exemplary embodiment of the guide sleeve 16. As shown in fig. 19a and 19b, the guide sleeve 16 has an inner hole 161 disposed axially therethrough, and the inner hole 161 of the guide sleeve 16 is engaged with the annular groove 3521 of the second guide 25. The guide sleeve 16 is generally cylindrical in configuration with an outer diameter D25, D25 being slightly smaller than D13. The diameter of the inner bore 161 of the guide sleeve 16 is D26, D26 being slightly larger than D23. Further, a mounting hole 163 penetrating the inner hole 161 is provided in a side wall of the guide bush 16, and the mounting hole 163 has an internal thread.

Fig. 20 shows an exemplary embodiment of the adjustment structure 15. As shown in fig. 20, the fourth guiding device 40 further includes an adjusting structure 15, so that the second guide 25 moves along the axial direction of the guide sleeve 16 under the driving of the adjusting structure 15.

The adjusting structure 15 specifically includes a polish rod section 152, a thread section 153 and a knob section 154 that are connected in sequence in the axial direction. The adjustment structure 15 here corresponds to a set screw. The polish rod section 152 has a diameter D27, an axial length L9, D27 slightly smaller than L6, and L9 slightly greater than L7. The threaded section 153 is fixed in engagement with the mounting hole 163 of the guide sleeve 16. The outer shape of the knob portion 154 is not limited, and may be various non-circular shapes such as a quincunx shape, a hexagonal shape, a square shape, an oval shape, etc., and preferably the outer surface of the knob portion 154 is subjected to the anti-slip treatment, and the form of the anti-slip treatment may be various types such as knurling, an anti-slip coating, a concave-convex treatment, etc.

Next, the manner in which the fourth guide 40 provided in this embodiment is used will be further described in connection with the preferred embodiment.

The first arm 12 and the second arm 13 are fixed together by first passing the 111 threaded interface on the handle 11 through the connecting hole 131 of the second arm 13 and the internally threaded hole 122 of the first arm 12. Next, the first guide 24 is fixed on the second end of the first support arm 12, for example, by welding (e.g., laser welding, argon arc welding), and the guide sleeve 16 is fixed on the second end of the second support arm 13, for example, by welding (e.g., laser welding, argon arc welding), and the second guide 25 is inserted into the guide sleeve 16, and the second guide 25 is axially engaged with the hole of the guide sleeve 16, and is fixed and limited by the adjusting structure 15.

After the above-described assembly process is completed, the inner bore 241 of the first guide 24 is disposed coaxially with the inner bore 254 of the second guide 25. When a k-wire is to be implanted, the adjustment mechanism 15 is rotated counterclockwise such that the second guide 25 moves axially within the guide sleeve 16, and the first guide 24 is first secured to the bone or soft tissue by the first serrations 242, and then the second guide 25 is moved axially such that the second serrations 253 are secured to the bone or soft tissue. When adjusted to the proper distance, the adjustment mechanism 15 is rotated clockwise such that the second guide 25 cannot move. A k-wire is then implanted through the bore 254 of the second guide 25. After the Kirschner wire is struck, the handle 11 is rotated to release the connection between the two support arms, so that the two support arms can be disassembled, and the Kirschner wire is exposed on bones.

In summary, the guiding device provided by the invention can determine the needle-in and needle-out positions and angles of the kirschner wires after the positions are adjusted in vitro, and the kirschner wires can be driven into the desired positions and angles only after the positions are confirmed in vitro, so that the problem that the needle-in positions and angles are not controlled perfectly when a doctor uses a single-side guiding device or does not use the guiding device can be avoided, the doctor does not need to pass through the C-arm machine for perspective once, and the radiation of the C-arm machine is reduced. In addition, the size of the guide device can be adjusted according to the body type of a patient, the use position and the size of the Kirschner wire, and the application range is wider. In addition, the two support arms of the guiding device are of split structures, the Kirschner wire can be detached after being implanted, the Kirschner wire does not need to be detached after being taken out, the operation efficiency and satisfaction of doctors are improved greatly, and company product brands are improved.

Therefore, the invention can effectively solve the problem of uncertain needle-in and needle-out positions and angles of the clinical Kirschner wire, and the Kirschner wire can be driven into an ideal position and angle only once after the external position is determined, thereby avoiding the repeated operation of doctors and reducing the radiation influence caused by the repeated use of the C-arm machine perspective.

It should be understood that the present application is not limited to a fixed connection between the components, and may be, for example, one or more of welding, bonding, screwing, pinning, and snap-in connection. It should also be understood that the same parts of embodiment two as embodiment one may not be described in detail, but the same parts may be referred to in detail with respect to embodiment one, and the same parts of embodiment three and embodiment four as embodiment two may not be described in detail, but the same parts may be referred to in detail with respect to embodiment two.

It should be understood that the foregoing is merely a preferred embodiment of the present invention and is not intended to be limiting in any way or nature, and that the innovations herein, while derived from the field of k-wire technology, are applicable to the guidance of drill bushings, taps or other orthopedic tools as would be understood by one of skill in the art.

It should be noted that several modifications and additions will be possible to those skilled in the art without departing from the method of the invention, which modifications and additions should also be considered as within the scope of the invention. Equivalent embodiments of the present invention will be apparent to those skilled in the art having the benefit of the teachings disclosed herein, when made with the changes, modifications, and variations to the invention; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A guiding device for orthopedic surgery, which is characterized by comprising a handle, an arm assembly, a guiding device assembly and a guiding structure;

the arm assembly comprises a first support arm and a second support arm which are oppositely arranged, wherein the first end of the first support arm is detachably connected with the handle, and the first end of the second support arm is detachably connected with the handle;

2. The guide device according to claim 1, wherein the guide structure comprises a guide sleeve fixedly provided at the second end of the corresponding arm, the guide sleeve having a guide hole penetrating axially therethrough, the guide passing through the guide hole, and the guide being movable only axially with respect to the guide sleeve or the guide being movable axially and circumferentially with respect to the guide sleeve.

3. The guide device of claim 2, wherein the guide sleeve further acts to limit circumferential rotation of the guide when the guide is only axially movable relative to the guide sleeve, the internal threads of the guide bore mating with the external threads of the guide.

4. A guide device according to claim 2, wherein the guide sleeve is further adapted to limit circumferential rotation of the guide when the guide is only axially movable relative to the guide sleeve, an inner limit pin being provided on an inner wall of the guide bore, an axial groove being provided on an outer surface of the guide, the inner limit pin being engaged with the axial groove.

5. The guide of claim 4, wherein the outer surface of the guide further comprises a plurality of axially spaced annular grooves extending axially therethrough.

6. The guide device of claim 1, further comprising an adjustment structure for driving the guide to move axially along the guide structure.

7. The guide device of claim 6, wherein the guide is threadably coupled to the adjustment structure and the guide structure is configured to limit circumferential rotation of the adjustment structure and circumferential rotation of the guide.

8. The guide device of claim 7, wherein the internal threads of the adjustment structure are matingly coupled with the external threads of the guide; the guide structure comprises two guide sleeves, the two guide sleeves are fixedly arranged on the inner side and the outer side of the second end of the corresponding support arm, the guide sleeves are provided with guide holes which are axially communicated, the adjusting structure is arranged between the two guide sleeves, and the guide device penetrates through the two guide sleeves and the adjusting structure.

9. The guide device of claim 1, further comprising a locking structure for coupling with a movable guide to lock the movable guide and the guide structure.

10. The guide device according to claim 9, wherein a plurality of axially spaced annular grooves are provided on an outer surface of the guide, and the locking structure has a snap-fit end for mating with any one of the annular grooves to lock the guide in a movable relationship.

11. The guide device according to claim 10, wherein the guide structure comprises a guide sleeve fixedly arranged at the second end of the corresponding support arm, the guide sleeve is provided with a guide hole which is penetrated axially, the outer wall of the guide sleeve is provided with a mounting hole communicated with the guide hole, the mounting hole is provided with an internal thread, and the external thread of the locking structure is fixedly connected with the internal thread of the mounting hole.

12. Guide device according to claim 1, characterized in that at least one of the two guides is provided with a saw tooth structure and/or that the first arm and/or the second arm is arc-shaped in the length direction.

13. The guide device according to claim 1, wherein the handle comprises an axially connected grip and an externally threaded interface, the first end of the first arm is provided with an internally threaded hole, the first end of the second arm is provided with a connecting hole, and the externally threaded interface is in threaded fixed connection with the connecting hole and the internally threaded hole, respectively.

14. The guide of claim 13, wherein the first end of the first arm is provided with a submerged mounting platform having the internally threaded bore therethrough, and the first end of the second arm is provided with a recessed notch to form a protruding mounting arm having the connecting bore therethrough; the mounting arm is disposed on the mounting platform.