A guide locking device and a fracture fixation system thereof

Abstract

The application discloses a guiding locking device and a fracture fixation system thereof, and relates to the technical field of medical devices. The guiding locking device comprises a guiding locking pipe and a locking piece, at least one strip-shaped slot is arranged on the pipe wall of the guiding locking pipe and communicates with the pipe cavity of the guiding locking pipe, the strip-shaped slot penetrates through the locking end, and the locking piece can drive the pipe wall of the locking end to contract. The fracture fixation system comprises a bone plate, a bone needle and the guiding locking device, a fixing through hole is arranged on the bone plate, the connecting end of the guiding locking pipe is fixedly connected with the fixing through hole, the guiding locking pipe is arranged perpendicularly to the bone plate, the bone needle is arranged in the pipe cavity of the guiding locking pipe, and the locking piece can drive the pipe wall of the locking end to contract and clamp the bone needle. The application reduces the risk of fracture displacement when the bone needle is used to fix the fracture; avoids the influence of the bone needle on the placement of the bone plate; shortens the length of the bone needle entering the medullary cavity, so that the application scene of the temporary fracture fixation technology of the bone needle is not limited in the treatment of the fracture by the intramedullary nail; and the stability is better than that of the multiple bone needles used to fix the fracture.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fracture fixation for medical use, in particular to a guiding and locking device and a fracture fixation system thereof. BACKGROUND

[0002] In a fracture surgery, a doctor needs to temporarily fix the fracture after reduction, so as to lay a foundation for the following perspective in different positions to evaluate the quality of fracture reduction, and implantation of internal fixation such as bone plate and intramedullary nail. Bone pin is the most commonly used technical solution for temporary fixation of fracture, and the specific steps are as follows: a plurality of bone pins are punctured into the medullary cavity from the appropriate position of one end of the fracture at a suitable angle to reach and puncture through the appropriate position of the other end of the fracture. This technical solution has the following problems: 1. The doctor needs a certain time and surgical skill to realize the fixation of the bone pin to the fracture end, and at the same time, the fracture is in an unstable state during the process of using the bone pin, and it is very difficult to maintain good reduction of the fracture. Therefore, the fracture is prone to displacement during the process of temporary fixation of the fracture by the bone pin; 2. There is a risk of injury to the surrounding blood vessels and nerves during the process of fixation of the fracture by the bone pin; 3. In some cases, the best position of the bone pin for puncture fixation of the fracture affects the placement of the bone plate, and adjusting the position of the bone pin for puncture fixation of the fracture will affect the effectiveness of the fixation of the fracture by the bone pin; 4. The bone pin passing through the medullary cavity affects the placement of the intramedullary nail in the medullary cavity during the process of fixation of the fracture by the bone pin; therefore, this technical solution is limited in the scene of fixation of the fracture by the intramedullary nail; 5. The stability of the fracture site reconstructed by the puncture fixation of the fracture end by the bone pin is unreliable; during the process of perspective of the fracture reduction quality in different positions, fixation of the fracture by intramedullary nail, bone plate and external fixation frame, and adjustment of the position of intramedullary nail, bone plate and external fixation frame, the fracture is prone to displacement under the action of external force.

[0003] Therefore, in view of the above-mentioned technical problems, it is necessary to propose a new innovation. SUMMARY

[0004] The present application aims to at least solve one of the deficiencies in the prior art, and proposes a guiding and locking device and a fracture fixation system thereof, and the specific scheme is as follows:

[0005] A guiding and locking device, comprising a guiding and locking pipe and a locking member, the guiding and locking pipe is a hollow tubular structure, the guiding and locking pipe has a locking end and a connecting end, at least one strip-shaped slot is arranged on the pipe wall of the guiding and locking pipe, the strip-shaped slot is in communication with the pipe cavity of the guiding and locking pipe, the strip-shaped slot penetrates through the locking end of the guiding and locking pipe, the locking member is arranged on the guiding and locking pipe, and the locking member can drive the pipe wall of the locking end of the guiding and locking pipe to tighten inward.

[0006] Further, the locking member is a hollow tubular structure, the locking member is sleeved on the guide locking pipe, the locking member can be driven to move along the axial direction of the guide locking pipe, and the pipe wall of the locking end of the guide locking pipe is tightened inwardly during the movement of the locking member.

[0007] Further, the lumen of the locking member includes a cylindrical cavity portion and a tapered cavity portion along the axial direction, the cylindrical cavity portion is in communication with the small-diameter port of the tapered cavity portion, the hole diameter of the cylindrical cavity portion is smaller than the outer diameter of the locking end of the guide locking pipe, the locking member is sleeved on the locking end of the guide locking pipe through the large-diameter port of the tapered cavity portion, the locking member can be driven to move towards the connection end of the guide locking pipe, and the tapered cavity portion and the cylindrical cavity portion tighten the pipe wall of the locking end of the guide locking pipe inwardly during the movement of the locking member.

[0008] Further, the outer side of the pipe wall of the guide locking pipe is provided with a step structure, the strip-shaped slot penetrates through the step structure, the locking member is located on one side of the step structure, the outer diameter of the step structure is greater than the inner diameter of the locking member, the locking member can be driven to move to the step structure, and the locking member extrudes the step structure to tighten the pipe wall of the locking end of the guide locking pipe inwardly during the movement of the locking member.

[0009] Further, the locking member is threadedly connected with the guide locking pipe.

[0010] Further, the pipe wall of the locking member is provided with a locking hole, the locking hole is in communication with the lumen of the locking member, a locking member is arranged in the locking hole, the locking member can be driven to tighten the guide locking pipe, thereby locking the locking member and the guide locking pipe.

[0011] Further, it further includes a clamping ring, the clamping ring is sleeved on the guide locking pipe, the clamping ring is located on the side of the locking member away from the connection end of the guide locking pipe, the locking member is driven to move away from the connection end of the guide locking pipe, the locking member drives the clamping ring to move away from the connection end of the guide locking pipe, and the pipe wall of the locking end of the guide locking pipe can be tightened inwardly during the movement of the clamping ring.

[0012] Further, the outer wall of the locking end of the guide locking pipe near the end portion is provided with a clamping convex structure, the clamping ring is located between the locking member and the clamping convex structure, the pipe wall of the locking end of the guide locking pipe can be tightened to the outer diameter of the clamping convex structure being not greater than the inner diameter of the clamping ring.

[0013] Further, the locking member is a clamping member, the locking member is sleeved on the guide locking pipe, and the locking member can drive the pipe wall of the locking end to be inwardly tightened when the locking member is clamped.

[0014] Further, the pipe wall of the connecting end of the guide locking pipe is provided with a threaded structure.

[0015] A bone fracture fixation system comprises a bone plate, a bone needle and the guide locking device, the bone plate is provided with a fixing through hole, the connecting end of the guide locking pipe is fixedly connected with the fixing through hole, the guide locking pipe is vertically arranged on the bone plate, the bone needle is arranged in the pipe cavity of the guide locking pipe, and the locking member can drive the pipe wall of the locking end to be inwardly tightened and clamp the bone needle.

[0016] Further, the bone needle is further provided with a limiting member.

[0017] Further, the special tool further comprises a handle and a tool rod part, one end of the tool rod part is connected with the handle, and the other end of the tool rod part is provided with an acting structure.

[0018] Compared with the prior art, the guide locking device and the bone fracture fixation system have at least one or more beneficial effects:

[0019] I. Quickly establishing preliminary stability at the bone fracture site, reducing the risk of fracture displacement during the fixation of the bone fracture by the bone needle: the doctor places the bone plate at the appropriate position of the target bone fracture, respectively punches the bone needle into the bone fracture on both sides under the guidance of the guide locking device, and then locks and connects the bone needle and the bone plate after the locking member of the guide locking device is locked, so that a reliable structure is simply and quickly formed at the bone fracture, the operation time and the operation difficulty of the bone needle puncture fixation of the bone fracture are reduced, and the risk of fracture displacement of the bone needle in the process of fixing the bone fracture is reduced.

[0020] II. Reducing the operation risk of the doctor in temporarily fixing the bone fracture by the bone needle: the length of the bone needle punched into the bone can be effectively controlled by arranging the limiting member on the bone needle, so that the incidence of the bone needle injuring the surrounding blood vessels and nerves is reduced.

[0021] III. The bone needle is far away from the fracture end, and secondary injury is avoided in the most serious part of the bone injury.

[0022] IV. The influence of the bone needle on the placement of the bone plate is avoided.

[0023] V. The length of the bone pin into the medullary cavity is shortened, so that the application scene of the bone pin temporary fixation technology in the treatment of fracture by intramedullary nail is not limited: under the guidance and locking of the guide locking device, multiple bone pins form a locking structure with the bone through the bone plate and the guide locking device, and the bone pins can be temporarily fixed by partially entering the medullary cavity, and the depth of the bone pin into the medullary cavity can be well controlled by the limiting piece, so that the bone pin does not block the placement of the intramedullary nail in the medullary cavity;

[0024] VI. The stability of the locking structure formed by multiple bone pins, a bone plate and a guide locking device is better than that of the fracture fixed by multiple bone pins, so that the risk of fracture displacement in the process of perspective and fixation of fracture by intramedullary nail, bone plate and external fixation frame is reduced, and the risk of fracture displacement in the process of replacement of intramedullary nail, bone plate and external fixation frame is also reduced;

[0025] VII. The bone pin can guide the position of the bone plate and the screw: when the position of the bone pin in the bone is good, the bone pin is replaced by the screw in sequence; when the position of the bone pin in the bone is poor, the bone pin can provide a reference for the implantation of the bone plate and the screw. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The structure schematic diagram of the bone plate provided by the embodiment of the application is shown in the figure;

[0027] Figure 2 The structure schematic diagram of the bone pin provided by the embodiment of the application is shown in the figure;

[0028] Figure 3 The structure schematic diagram of the guide locking device provided by the embodiment of the application is shown in the figure;

[0029] Figure 4 The structure schematic diagram of the guide locking tube provided by the embodiment of the application is shown in the figure;

[0030] Figure 5 The structure schematic diagram of the bone pin provided by the embodiment of the application is shown in the figure, and the outer thread structure is arranged on the surface of the rod part close to the needle tip part;

[0031] Figure 6 The structure schematic diagram of the guide locking tube provided by the embodiment of the application is shown in the figure, and one strip-shaped groove penetrates through both ends of the guide locking tube;

[0032] Figure 7 The structure schematic diagram of the multi-prism locking piece provided by the embodiment of the application is shown in the figure;

[0033] Figure 8 The structure schematic diagram of the locking piece provided by the embodiment of the application is shown in the figure, and one end of the locking piece away from the connecting end of the guide locking tube is a multi-prism;

[0034] Figure 9 The structure schematic diagram of the locking piece provided by the embodiment of the application is shown in the figure, and one end of the locking piece away from the connecting end of the guide locking tube is a multi-prism; Figure 8A half sectional view of the locking member shown in the figure;

[0035] Figure 10 A partial sectional view of the guiding and locking device provided with the bone needle inserted, according to an embodiment of the present application;

[0036] Figure 11 A structure diagram of the locking member provided with the internal thread structure, according to an embodiment of the present application;

[0037] Figure 12 A structure diagram of the locking member provided with the locking member, according to an embodiment of the present application;

[0038] Figure 13 A structure diagram of the guiding and locking tube with the step structure formed on the outer side of the tube wall, according to an embodiment of the present application;

[0039] Figure 14 A structure diagram of the guiding and locking tube, according to an embodiment of the present application, when the guiding and locking tube is in the structure shown in the figure; Figure 13 A partial sectional view of the guiding and locking device, according to an embodiment of the present application, when the guiding and locking tube is in the structure shown in the figure;

[0040] Figure 15 A half sectional view of the locking member with the lumen composed of the cylindrical cavity part and the conical cavity part, according to an embodiment of the present application;

[0041] Figure 16 A structure diagram of the guiding and locking tube with the step structure formed on the outer side of the tube wall, according to another embodiment of the present application;

[0042] Figure 17 A structure diagram of the guiding and locking device, according to an embodiment of the present application, when the guiding and locking tube is in the structure shown in the figure; Figure 16 A structure diagram of the guiding and locking device, according to an embodiment of the present application, when the guiding and locking tube is in the structure shown in the figure;

[0043] Figure 18 A structure diagram of the guiding and locking device provided with the bone needle inserted, according to an embodiment of the present application, when the locking member and the guiding and locking tube are locked through the locking member;

[0044] Figure 19 A partial sectional view of the guiding and locking device provided with the bone needle inserted, according to an embodiment of the present application, when the clasp ring is provided;

[0045] Figure 20 A partial sectional view of the guiding and locking device provided with the bone needle inserted, according to an embodiment of the present application, when the clasp protrusion structure is provided on the outer wall close to the end part of the guiding and locking tube locking end;

[0046] Figure 21 An enlarged diagram of I in the figure; Figure 20

[0047] Figure 22 ​The structure schematic diagram of the guiding locking device with the inserted bone needle for the locking member provided by the embodiment of the present application is a hoop;

[0048] Figure 23 The installation position schematic diagram of the limiting member on the bone needle provided by the embodiment of the present application is shown in the figure;

[0049] Figure 24 The installation position schematic diagram between the bone needle provided by the embodiment of the present application with the limiting member and the guiding locking device is shown in the figure;

[0050] Figure 25 The structure schematic diagram of the guiding locking tube provided by the embodiment of the present application with the second protruding structure of the polygonal prism is shown in the figure;

[0051] Figure 26 The structure schematic diagram of the special tool provided by the embodiment of the present application with the limiting recess structure of the polygonal prism is shown in the figure;

[0052] Figure 27 The structure schematic diagram of the special tool provided by the embodiment of the present application with the limiting protruding structure of the polygonal prism is shown in the figure;

[0053] Figure 28 The structure schematic diagram of the special tool provided by the embodiment of the present application with the limiting protruding structure of the cross is shown in the figure;

[0054] Figure 29 The installation position schematic diagram between the guiding locking device and the bone plate provided by the embodiment of the present application is shown in the figure;

[0055] Figure 30 The installation position schematic diagram between the guiding locking device and the bone plate provided by the embodiment of the present application and the target bone is shown in the figure;

[0056] Figure 31 The installation position schematic diagram between the bone fracture fixation system provided by the embodiment of the present application and the target bone is shown in the figure.

[0057] Wherein, 1-guiding locking device, 11-guiding locking pipe, 111-locking end, 112-connection end, 113-strip-shaped groove, 114-first threaded structure, 115-step structure, 116-convex structure, 117-fifth threaded structure, 118-sixth threaded structure, 119-multilateral prism structure, 120-second convex structure, 12-locking piece, 121-cylindrical cavity, 122-tapered cavity, 123-first locking hole, 124-first locking piece, 1241-first groove structure, 125-fourth threaded structure, 126-seventh threaded structure, 127-eighth threaded structure, 128-receiving groove, 129-stop surface, 13-clasping ring, 131-flange structure, 2-bone plate, 21-fixing through hole, 211-second threaded structure, 3-bone needle, 31-needle tip, 32-shaft, 33-third threaded structure, 4-limiting piece, 41-second locking hole, 42-second locking piece, 5-special tool, 51-handle, 52-tool shaft, 53-acting structure, 6-bone. DETAILED DESCRIPTION

[0058] In order to further clarify the technical means and effects taken by the present application to achieve the predetermined object of the application, the specific embodiments, structures, features and effects thereof according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0059] The present embodiment provides a bone fracture fixation system, which comprises a bone plate 2, a bone needle 3 and a guiding locking device 1.

[0060] The bone plate 2 is provided with at least two fixing through holes 21 spaced apart along the length direction, as shown in the figure. Figure 1 The bone fracture fixation system comprises at least two groups of guiding locking devices 1 and bone needles 3, preferably two groups.

[0061] The bone needle 3 has a needle tip 31 and a shaft 32 in the axial direction, as shown in the figure. Figure 2 The needle tip 31 is a pyramid structure, such as a triangular pyramid, a quadrangular pyramid or other polygonal pyramid. The tapered end of the needle tip 31 can be blunt, which is beneficial to protect the important tissues around the bone 6. The tapered end of the needle tip 31 can also be sharp, which is more beneficial to the penetration of the bone needle 3 into the bone 6. The bone needle 3 has a fast implantation speed and small damage to the bone 6, which lays a foundation for the repositioning of the fracture and the adjustment of the positional relationship between the bone 6 and the bone plate 2, and helps to improve the operation quality, so the bone needle 3 becomes the best choice to replace the screw.

[0062] The guiding locking device 1 comprises a guiding locking pipe 11 and a locking piece 12, as shown in the figure. Figure 3 The guiding locking pipe 11 is a hollow tubular structure, and the guiding locking pipe 11 has a locking end 111 and a connection end 112, as shown in the figure.Figure 4 The connecting end 112 of the guide locking tube 11 is fixedly connected with the fixed through hole 21, and the guide locking tube 11 is arranged perpendicularly to the bone plate 2. Preferably, the guide locking tube 11 is threadedly connected with the fixed through hole 21, that is, the pipe wall of the guide locking tube 11 close to the connecting end 112 is provided with an external thread structure, which is defined as a first thread structure 114, the hole wall of the fixed through hole 21 is provided with an internal thread structure matched with the first thread structure 114, which is defined as a second thread structure 211, and the connecting end 112 of the guide locking tube 11 is fixedly connected with the fixed through hole 21 through cooperation of the first thread structure 114 and the second thread structure 211. The bone pin 3 is arranged in the lumen of the guide locking tube 11, and the locking member 12 can drive the pipe wall of the locking end 111 to be tightened inwardly and clamp the bone pin 3. In a specific implementation, the guide locking device 1 is first preassembled on the bone plate 2, and then the bone plate 2 is placed at the fracture of the target bone 6 and is made to be attached to the target bone 6; one of the bone pins 3 is inserted into the guide locking tube 11 of one of the guide locking devices 1, and the needle tip part 31 thereof is implanted into the part of the bone 6 on one side of the fracture; the other bone pin 3 is inserted into the guide locking tube 11 of the other guide locking device 1, and the needle tip part 31 thereof is implanted into the part of the bone 6 on the other side of the fracture. When the two guide locking devices 1 lock the corresponding bone pins 3 respectively, the bone plate 2 can be fixed on the target bone 6. The guide locking device 1 and the bone plate 2 form a locking frame structure, which provides reliable temporary stability for the fracture end and lays a physical foundation for further operation.

[0063] The surface of the bone pin 3 can be smooth or rough, and is preferably rough, which can enable the guide locking tube 11 to clamp the bone pin 3 better. Further preferably, the bone pin 3 can be provided with an external thread structure on the surface of the rod part 32 close to the needle tip part 31, which is defined as a third thread structure 33, as shown in the figure, which can increase the riveting effect of the bone pin 3 in the bone 6. Figure 5

[0064] The pipe wall of the guide locking tube 11 is provided with at least one strip-shaped groove 113, and preferably a plurality of strip-shaped grooves 113 are arranged around the pipe wall of the guide locking tube 11. The strip-shaped groove 113 is in communication with the lumen of the guide locking tube 11, and the strip-shaped groove 113 penetrates the locking end 111 of the guide locking tube 11, as shown in the figure. Figure 4 ​The length direction of the strip-shaped groove 113 is preferably consistent with the axial direction of the guide locking tube 11. Of course, the length direction of the strip-shaped groove 113 can also be inconsistent with the axial direction of the guide locking tube 11, i.e. the length direction of the strip-shaped groove 113 has a certain angle with the axial direction of the guide locking tube 11. The outer side of the tube wall of the guide locking tube 11 can be a smooth surface or a non-smooth surface, and is preferably a non-smooth surface. The inner side of the tube wall of the guide locking tube 11 can be a smooth surface or a non-smooth surface, and is preferably a non-smooth surface. It should be noted that in the embodiment in which one strip-shaped groove 113 is arranged on the tube wall of the guide locking tube 11, the strip-shaped groove 113 can penetrate only the locking end 111 of the guide locking tube 11, or can penetrate the locking end 111 and the connecting end 112 of the guide locking tube 11 respectively; in the embodiment in which a plurality of strip-shaped grooves 113 are arranged on the tube wall of the guide locking tube 11, all the strip-shaped grooves 113 can penetrate the locking end 111 of the guide locking tube 11, or one of the strip-shaped grooves 113 can penetrate the locking end 111 and the connecting end 112 of the guide locking tube 11 respectively, as shown in Figure 6

[0065] In one embodiment, the locking member 12 is a hollow tubular structure, the locking member 12 is sleeved on the guide locking tube 11, the locking member 12 can be driven to move along the axial direction on the guide locking tube 11, and during the movement of the locking member 12, the locking member 12 can drive the tube wall of the locking end 111 of the guide locking tube 11 to tighten inward. The outer side of the tube wall of the locking member 12 can be a smooth surface or a non-smooth surface, and is preferably a non-smooth surface. The locking member 12 is preferably at least partially non-circular in radial cross-sectional shape, such as can be polygonal as shown in Figure 7 such as can also be non-circular as shown in Figure 8 such as can also be non-circular as shown inThe shape of the locking member 12 is not limited to the above-mentioned shapes, and can also be any other shape.

[0066] In a further embodiment, the lumen of the locking member 12 includes a cylindrical cavity portion 121 and a tapered cavity portion 122 along the axial direction, the cylindrical cavity portion 121 communicates with the small-diameter end of the tapered cavity portion 122, as shown in Figure 9 The hole diameter of the cylindrical cavity portion 121 is smaller than the outer diameter of the locking end 111 of the guide locking tube 11. The locking member 12 is sleeved on the locking end 111 of the guide locking tube 11 through the large-diameter port of the tapered cavity portion 122, as shown inFigure 10 As the locking member 12 is driven to move towards the connecting end 112 of the guiding and locking tube 11, the cavity wall of the conical cavity portion 122 will constrain the tube wall of the locking end 111 of the guiding and locking tube 11, and squeeze and drive the tube wall of the locking end 111 of the guiding and locking tube 11 to contract inwardly until the locking end 111 of the guiding and locking tube 11 enters the cylindrical cavity portion 121. The contraction of the tube wall of the locking end 111 can clamp and lock the bone needle 3 inserted into the guiding and locking tube 11.

[0067] In a further embodiment, the locking member 12 and the guiding and locking tube 11 can be directly clamped. During the insertion of the locking end 111 of the guiding and locking tube 11 into the cylindrical cavity portion 121, the tube wall of the cylindrical cavity portion 121 will constrain and squeeze the tube wall of the locking end 111 of the guiding and locking tube 11 until the tube wall of the locking end 111 of the guiding and locking tube 11 abuts and clamps the bone needle 3. With the continuous movement of the locking member 12, the cavity wall of the cylindrical cavity portion 121 will clamp with the tube wall of the guiding and locking tube 11. In a specific implementation, the cavity wall of the cylindrical cavity portion 121 is preferably provided with a non-smooth surface, which can increase the friction between the locking member 12 and the guiding and locking tube 11, thereby improving the locking firmness between the locking member 12 and the guiding and locking tube 11.

[0068] In another further embodiment, the locking member 12 and the guiding and locking tube 11 can also be threadedly connected, as shown in FIG. 6. Figure 11 As shown in FIG. 6, the inner wall of the cylindrical cavity portion 121 is provided with an internal thread structure, which is defined as a fourth thread structure 125. The outer side of the tube wall of the guiding and locking tube near the locking end 111 is provided with an external thread structure matching the fourth thread structure 125, which is defined as a fifth thread structure 117. Figure 6 When the locking end 111 of the guiding and locking tube 11 enters the cylindrical cavity portion 121, the locking member 12 can be driven to move along the axial direction of the guiding and locking tube 11 by rotating the locking member 12.

[0069] Of course, the connection between the locking member 12 and the guiding and locking tube 11 is not limited to the above two modes, and other modes can also be used. For example, a locking hole can be provided on the tube wall of the locking member 12, which is defined as a first locking hole 123. The first locking hole 123 communicates with the lumen of the locking member 12. A first locking member 124 is arranged in the first locking hole 123, which can be driven to press the guiding and locking tube 11, thereby locking the locking member 12 and the guiding and locking tube 11. The first locking member 12 is preferably a jack structure, such asFigure 12 As shown, the locking member 12 is threadedly connected with the first locking hole 123, and the first locking member 124 can be driven into the lumen of the locking member 12 and tightly press against the guide locking tube 11 by rotating the first locking member 124. The end of the jackscrew structure away from the lumen of the guide locking tube 11 can be provided with a setting structure so that the jackscrew structure can be more conveniently rotated by a tool. The setting structure can be a recess structure of a set shape, which is defined as a first recess structure 1241. The first recess structure 1241 can or can not penetrate the jackscrew structure. The first recess structure 1241 can be, for example, a polygonal recess structure as shown in FIG. 1, or a wrench-shaped, star-shaped, cross-shaped or other similar recess structure that can be operated by a tool. Figure 12 The setting structure can also be a protrusion structure of a set shape, which is defined as a first protrusion structure. The first protrusion structure can be, for example, a polygonal protrusion structure, or a wrench-shaped, star-shaped, cross-shaped or other similar protrusion structure that can be operated by a tool.

[0070] In another further embodiment, the outer side of the tube wall of the guide locking tube 11 is provided with a step structure 115, the strip-shaped groove 113 penetrates the step structure 115, the locking member 12 is located on one side of the step structure 115, the outer diameter of the step structure 115 is greater than the inner diameter of the locking member 12, the locking member 12 can be driven to move to the step structure 115, and during the movement of the locking member 12, the locking member 12 extrudes the step structure 115 to drive the tube wall of the locking end 111 of the guide locking tube 11 to tighten inwardly.

[0071] As shown in FIG. 1, one of the embodiment schemes is schematically shown, the locking end 111 of the guide locking tube 11 is designed to be thicker, thereby forming a step structure 115 on the outer side of the tube wall of the guide locking tube 11. The locking member 12 is sleeved on the thinner part of the guide locking tube 11. The locking member 12 can be, for example, Figure 13 As shown in FIG. 1, one of the embodiment schemes is schematically shown, the locking end 111 of the guide locking tube 11 is designed to be thicker, thereby forming a step structure 115 on the outer side of the tube wall of the guide locking tube 11. The locking member 12 is sleeved on the thinner part of the guide locking tube 11. The locking member 12 can be, for example, Figure 7 As shown in FIG. 1, one of the embodiment schemes is schematically shown, the locking end 111 of the guide locking tube 11 is designed to be thicker, thereby forming a step structure 115 on the outer side of the tube wall of the guide locking tube 11. The locking member 12 is sleeved on the thinner part of the guide locking tube 11. The locking member 12 can be, for example, Figure 13 and Figure 14As shown, an external thread structure, defined as the sixth thread structure 118, is provided on the outer side of the wall of the thinner portion of the locking guide tube; an internal thread structure, matching the sixth thread structure 118, is provided on the inner wall of the cavity of the locking member 12, defined as the seventh thread structure 126. The locking member 12 is threadedly connected to the locking guide tube through the cooperation of the sixth thread structure 118 and the seventh thread structure 126, thereby driving the locking member 12 to move along the axial direction on the guide locking tube 11 when the locking member 12 is rotated. In another embodiment, the locking member 12 may also be as described in the previous embodiment, with its cavity composed of a cylindrical cavity 121 and a conical cavity 122. When the locking member 12 is fitted onto the thinner portion of the guide locking tube 11, the large-diameter port of the conical cavity 122 faces the stepped structure 115. The side of the stepped structure 115 facing the connecting end 112 of the guide locking tube 11 can be configured as an inclined transition surface or not, but is preferably configured as an inclined transition surface. When the locking member 12 is driven to move towards the locking end 111 of the guide locking tube 11 to the stepped structure 115, the cavity wall of the conical cavity 122 will constrain and compress the stepped structure 115, thereby driving the tube wall of the locking end 111 of the guide locking tube 11 to tighten inward. Similarly, the locking member 12 and the guide locking tube 11 are preferably connected by threads, for example... Figure 15 As shown, an internal thread structure matching the sixth thread structure 118 is provided on the inner wall of the cylindrical cavity 121 of the locking member 12, which is defined as the eighth thread structure 127. The locking member 12 is threadedly connected to the locking guide tube through the cooperation of the sixth thread structure 118 and the eighth thread structure 127.

[0072] like Figure 16 As shown in the figure, another embodiment is schematically illustrated. Unlike the previous embodiment, it forms a stepped structure 115 by providing a protruding structure on the outer wall of the guide locking tube 11 near the locking end 111. In this embodiment, the locking member 12 can be disposed on the side of the protruding structure opposite to the connecting end 112 of the guide locking tube 11, such as... Figure 17As shown, the protruding structure can also be arranged on the side of the locking member 12 facing the connecting end 112 of the guide locking tube 11. When the locking member 12 is driven to move to the protruding structure, i.e. the step structure 115, the inner wall of the lumen of the locking member 12 will constrain and press the step structure 115, thereby driving the tube wall of the locking end 111 of the guide locking tube 11 to tighten inward. Similarly, the connection between the locking member 12 and the guide locking tube 11 is preferably threaded connection, and the lumen of the locking member 12 can be a cylindrical cavity structure only, and the side of the protruding structure facing the locking member 12 is an inclined transition surface; or the lumen of the locking member 12 can be composed of a cylindrical cavity part 121 and a conical cavity part 122, and the side of the protruding structure facing the locking member 12 can be arranged as an inclined transition surface or not as an inclined transition surface, and the specific principle is basically the same as that of the above-mentioned embodiments, which will not be described here.

[0073] It should be noted that in the above embodiment in which the step structure 115 is arranged on the outer side of the tube wall of the guide locking tube 11, the connection between the locking member 12 and the guide locking tube 11 is also not limited to threaded connection, but can also be other connection modes, such as the above-mentioned connection mode by locking. Figure 18 As shown, the specific principle is basically the same as that of the above-mentioned embodiments, which will not be described here.

[0074] In a further embodiment, the guide locking tube 11 is further provided with a snap ring 13, and the snap ring 13 is located on the side of the locking member 12 away from the connecting end 112 of the guide locking tube 11. It should be noted that the snap ring 13 is only applicable to the above-mentioned embodiment in which the locking member 12 is driven to move in the direction away from the connecting end 112 of the guide locking tube 11 to drive the tube wall of the locking end 111 of the guide locking tube 11 to tighten inward, as shown in Figure 19 The number of the snap ring 13 can be one or more. When the locking member 12 is driven to move in the direction away from the connecting end 112 of the guide locking tube 11, the locking member 12 drives the snap ring 13 to move in the direction away from the connecting end 112 of the guide locking tube 11, and after the snap ring 13 moves to a certain position, the snap ring 13 continues to move to drive the tube wall of the locking end 111 of the guide locking tube 11 to tighten inward. Specifically, the inner diameter of the snap ring 13 is greater than the outer diameter of the end part of the locking end 111 of the guide locking tube 11 when it is tightened to the closed strip-shaped groove 113. The outer diameter of a part of the tube wall near the end part of the locking end 111 of the guide locking tube 11 is designed to decrease in the direction of the connecting end 112 of the guide locking tube 11, as shown in Figures 19 to 21As shown. In specific implementation, the locking member 12 can be driven to move towards the connecting end 112 of the guide locking tube 11 to tighten the wall of the locking end 111 of the guide locking tube 11 inward until the outer diameter of the locking end 111 of the guide locking tube 11 is smaller than the inner diameter of the retaining ring 13. Then, the retaining ring 13 can be fitted onto the locking end 111 of the guide locking tube 11. After the retaining ring 13 is installed, the locking member 12 is driven to move away from the connecting end 112 of the guide locking tube 11. The wall of the locking end 111 of the guide locking tube 11 will expand outward, and the outer diameter of the locking end 111 of the guide locking tube 11 will also expand to be larger than the inner diameter of the retaining ring 13, making it impossible for the retaining ring 13 to easily disengage from the locking end 111 of the guide locking tube 11. When the locking member 12 is driven to move away from the connecting end 112 of the guide locking tube 11, the locking member 12 will abut against the retaining ring 13. When the locking member 12 is driven further away from the connecting end 112 of the guide locking tube 11, the retaining ring 13 will also be pushed by the locking member 12 to move away from the connecting end 112 of the guide locking tube 11. Since the outer diameter of the tube wall near the end of the locking end 111 of the guide locking tube 11 increases in the direction away from the connecting end 112 of the guide locking tube 11, the inner wall of the retaining ring 13 can also drive the tube wall of the locking end 111 of the guide locking tube 11 to tighten inward during the movement of the retaining ring 13. Thus, the locking member 12 can be driven in two directions to lock the bone needle 3, making the guide locking device 1 of this embodiment applicable to more usage scenarios and meeting the different operating habits of operators.

[0075] In a further embodiment, a retaining protrusion 116 may be provided on the outer wall of the guide locking tube 11 near the locking end 111, and the retaining ring 13 is located between the locking member 12 and the retaining protrusion 116, such as... Figure 20 and Figure 21 As shown. The wall of the locking end 111 of the guide locking tube 11 can be tightened so that the outer diameter of the latching protrusion 116 is not greater than the inner diameter of the retaining ring 13, thereby ensuring that the retaining ring 13 can pass smoothly through the latching protrusion 116 and be fitted onto the guide locking tube 11. Figure 21 The diagram schematically illustrates a preferred retaining ring 13, whose inner wall is provided with a flange structure 131. The inner diameter of the flange structure 131 is the inner diameter of the retaining ring 13. When the retaining ring 13 is sleeved between the locking member 12 and the retaining protrusion structure 116, the retaining protrusion structure 116 can form a stop on the flange structure 131, thereby ensuring that when the locking member 12 is driven to move away from the connecting end 112 of the guide locking tube 11, the retaining ring 13 will not disengage from the locking end 111 of the guide locking tube 11.

[0076] In further embodiments, a receiving groove 128 for receiving the clamping ring 13 can also be provided on the locking member 12 at the end away from the connecting end 112 of the guide locking tube 11, as shown in Figures 19 to 21 The receiving groove 128 is formed with a stop surface 129 that can abut against the clamping ring 13, so that when the locking member 12 is moved in a direction away from the connecting end 112 of the guide locking tube 11, the clamping ring 13 can be pushed to move synchronously. By providing the receiving groove 128, the clamping ring 13 can be embedded in the locking member 12, thereby providing protection for the clamping ring 13, preventing the clamping ring 13 from falling off or being lost due to accidental contact during use.

[0077] In another embodiment, the locking member 12 can also be a clamping member. The clamping member is sleeved on the guide locking tube 11 at the position where the strip-shaped groove 113 is formed, and the pipe wall of the locking end 111 is driven to tighten inward by clamping the clamping member. The clamping member can be, for example, a clamp as shown in Figure 22 The pipe wall of the locking end 111 can be driven to tighten inward by adjusting the fastening bolt on the clamp. Of course, the clamping member is not limited to a clamp, and can also be any component that can achieve clamping, such as a strap, etc.

[0078] In further embodiments, the bone fracture fixation system further comprises a limiting member 4. The limiting member 4 is fixedly arranged on the bone pin 3, as shown in Figure 23 The limiting member 4 has a size greater than the inner diameter of the guide locking tube 11, so that when the bone pin 3 is inserted into the lumen of the guide locking tube 11, the limiting member 4 abuts against the locking end 111 of the guide locking tube 11, as shown in Figure 24 Thus, the limiting member 4 plays a limiting role. In specific implementation, the operator can select the fixed position of the limiting member 4 on the bone pin 3 according to needs, so that the operator can better control the length of the bone pin 3 driven into the bone 6. The limiting member 4 is preferably a hollow tubular structure. The radial cross-sectional shape of the limiting member 4 can be any shape, such as a circular shape or a polygonal shape, or other non-circular shapes. The lumen of the limiting member 4 can be smooth or non-smooth, and is preferably non-smooth. The pipe wall of the limiting member 4 is provided with a locking hole, which is defined as a second locking hole 41, and the second locking hole 41 communicates with the lumen of the limiting member 4. A second locking member 42 is arranged in the second locking hole 41, and the second locking member 42 can be driven to tighten the bone pin 3 in the lumen of the limiting member 4, thereby locking the limiting member 4 and the bone pin 3, such as Figure 23As shown, the second locking member 42 is preferably a set screw structure. The second locking member 42 is threadedly connected to the second locking hole 41. By rotating the second locking member 42, the second locking member 42 can be driven into the cavity of the limiting member 4 and press against the bone needle 3. The set screw structure used in the second locking member 42 can be referred to the first locking member 124 described above, and will not be repeated here.

[0079] In a further embodiment, a portion of the wall of the guide locking tube 11 may be configured with a non-circular radial cross-section, making it easier to rotate the guide locking tube 11 using tools. For example... Figure 24 As shown, the radial cross-section of the guide locking tube 11 near the bone plate 2 is polygonal, that is, the part of the guide locking tube 11 near the bone plate 2 has a polygonal prism structure 119, and the guide locking tube 11 can be rotated by tools such as wrenches through the polygonal prism structure 119.

[0080] In other further embodiments, the locking end 111 of the guide locking tube 11 can also be configured with a structure that allows the guide locking tube 11 to be rotated more easily with a tool. For example, the configuration structure can be a protruding structure of a defined shape, defined as a second protruding structure 120. The second protruding structure 120 can be, for example, a... Figure 25 The polygonal prism-shaped protrusion shown can be another type of protrusion, such as a plum blossom shape, a star shape, or a cross shape, which can be manipulated using a tool. Alternatively, the set structure can also be a groove structure of a set shape, defined as the second groove structure. The second groove structure can be, for example, a polygonal prism-shaped groove structure, or another type of groove structure, such as a plum blossom shape, a star shape, or a cross shape, which can be manipulated using a tool. It should be noted that since the strip groove 113 penetrates the locking end 111 of the guide locking tube 11, the slot formed by the strip groove 113 at the locking end 111 of the guide locking tube 11 can also serve as the second groove structure. Of course, other shapes of second groove structures can also be re-established at the locking end 111 of the guide locking tube 11.

[0081] In a further embodiment, the fracture fixation system also includes a special tool 5. For example... Figures 26 to 28 As shown in the figure, a special tool 5 is schematically illustrated, which includes a handle 51 and a tool shaft 52. One end of the tool shaft 52 is connected to the handle 51, and the other end of the tool shaft 52 is provided with an actuating structure 53. The actuating structure 53 may be a limiting groove structure that matches the shape of the first protrusion structure on the first locking member 124, such as... Figure 26 As shown; or a limiting protrusion structure that matches the shape of the first groove structure 1241 on the first locking member 124, such asFigure 27 or Figure 28 When rotating the first locking member 124, the limiting groove structure on the special tool 5 is sleeved on the corresponding first protruding structure, or the limiting protruding structure on the special tool 5 is inserted into the corresponding first groove structure 1241, and then the first locking member 124 can be rotated by rotating the special tool 5 along the axis. Similarly, the same is true for the second locking member 42, which will not be described here.

[0082] The action structure 53 can also be a limiting groove structure matched with the shape of one end of the locking member 12 away from the connecting end 112 of the guide locking pipe 11, and the inner diameter of the limiting groove structure is greater than the size of the limiting member 4. The limiting groove structure of the special tool 5 is sleeved on the locking member 12, and then the locking member 12 can be rotated by rotating the special tool 5 along the axis.

[0083] The action structure 53 can also be a limiting groove structure matched with the shape of the second protruding structure 120 of the locking end 111 of the guide locking pipe 11, or a limiting protruding structure matched with the shape of the second groove structure of the locking end 111 of the guide locking pipe 11. The limiting groove structure of the special tool 5 is sleeved on the corresponding second protruding structure 120, or the limiting protruding structure on the special tool 5 is inserted into the corresponding second groove structure, and then the guide locking pipe 11 can be rotated by rotating the special tool 5 along the axis.

[0084] The fracture fixation system of the present application can be applied to various fracture treatments to provide stable temporary fixation after fracture reduction. The following will be described in combination with Figure 23 , Figures 29 to 31 The use process of the fracture fixation system of the present application in the fracture surgery of the diaphyseal part will be exemplarily described:

[0085] Step 1: According to the standard surgical procedure, disinfect and lay the single; select the appropriate bone plate 2, and install two guide locking devices 1 on the bone plate 2, as shown in Figure 29 ; The limiting member 4 is sleeved on the bone pin 3, and the fixed position of the limiting member 4 on the bone pin 3 is set according to the length of the bone pin 3 entering the bone 6, and then the limiting member 4 and the bone pin 3 are fixed, as shown in Figure 23 ;

[0086] Step 2: According to the standard surgical approach, expose the fracture, and place the bone plate 2 at the appropriate part of the bone 6, as shown in Figure 30As shown; then one of the bone pins 3 is inserted into the guide locking tube 11 of one of the guide locking devices 1, and is implanted into the bone 6 on one side of the fracture by using a drill, then the locking member 12 of the corresponding guide locking device 1 is rotated to make the tube wall of the locking end 111 of the corresponding guide locking tube 11 inwardly contract and clamp the bone pin 3; next, the fracture alignment line is reset and temporarily maintained by traction, reduction forceps and the like, then the other bone pin 3 is inserted into the guide locking tube 11 of the other guide locking device 1, and is implanted into the bone 6 on the other side of the fracture, then the locking member 12 of the corresponding guide locking device 1 is rotated to make the tube wall of the locking end 111 of the corresponding guide locking tube 11 inwardly contract and clamp the bone pin 3, as shown. The bone pins 3 and the guide locking devices 1 on both sides of the fracture and the bone plate 2 form a locked structure, which preliminarily reconstructs the stability of the fracture site. Figure 31

[0087] Step 3: According to the same operation process, a plurality of bone pins 3 are punched into the bone on both sides of the fracture line, forming a more reliable structure at both ends of the fracture, effectively maintaining the stability of the fracture reduction;

[0088] Step 4: The doctor observes the quality of the fracture reduction and the position relationship between the bones 6 on both sides of the fracture and the bone plate 2 by direct vision and fluoroscopy; when the doctor finds that the quality of the fracture reduction or the position of the bone plate 2 is poor, the locking member 12 of the corresponding guide locking device 1 is loosened to release the clamped bone pin 3, and the bone pin 3 is removed from the bone 6 by using a drill; after re-reducing the fracture or adjusting the position of the bone plate 2, the bone pin 3 is re-punched into the new appropriate position by using a drill, and the locking member 12 of the corresponding guide locking device 1 is rotated to clamp the bone pin 3; the quality of the fracture reduction and the position relationship between the bones 6 on both sides of the fracture and the bone plate 2 are observed again by direct vision and fluoroscopy, if the quality is poor, the above-mentioned operation is repeated to adjust the position of the bone pin 3 until the fracture reduction and the position of the bone plate 2 are good;

[0089] Step 5: Each bone pin 3 and guide locking device 1 is sequentially removed, and after each bone pin 3 and guide locking device 1 is removed, a screw hole with a suitable diameter is punched on the bone through the corresponding fixed through hole 21 of the bone plate 2, the depth of the hole is measured, then a screw with a suitable length is screwed in, the replacement of the screw, the bone pin 3 and the guide locking device 1 is completed; and additional screws are implanted according to clinical needs;

[0090] Step 6: The fracture reduction and the position of the internal fixation are confirmed to be good again by fluoroscopy, the wound is washed and definitely hemostasia, and then the skin is sutured in sequence.

[0091] Compared with the prior art, the guide locking device and the fracture fixation system of the present application have at least one or more of the following beneficial effects:

[0092] ​I. Quickly establish primary stability at the fracture site, reduce the risk of fracture displacement during the process of fixing the fracture with bone pins: the doctor places the bone plate at the appropriate position of the fracture of the target bone, and then drives the bone pins into the two sides of the fracture under the guidance of the guiding and locking device. After the locking member of the guiding and locking device is locked, the bone pins and the bone plate are locked and connected, forming a reliable structure at the fracture site quickly and simply, reducing the operation time and difficulty of fixing the fracture with bone pins, and reducing the risk of fracture displacement during the process of fixing the fracture with bone pins.

[0093] II. Reduce the surgical risk of the doctor using bone pins to temporarily fix the fracture: the length of the bone pin driven into the bone can be effectively controlled by the limiting member on the bone pin, reducing the incidence of injury to the surrounding blood vessels and nerves.

[0094] III. The bone pin is away from the fracture end, avoiding secondary injury at the most serious part of the bone injury.

[0095] IV. Avoid the influence of the bone pin on the placement of the bone plate.

[0096] V. The length of the bone pin entering the medullary cavity is shortened, so that the application scenario of the temporary fracture fixation technology with bone pins is not limited in the treatment of fractures with intramedullary nails: under the guidance and locking of the guiding and locking device, multiple bone pins form a locking structure with the bone through the bone plate and the guiding and locking device, and the bone pins can effectively temporarily fix the fracture by partially entering the medullary cavity. The limiting member can well control the depth of the bone pin entering the medullary cavity, avoiding the blocking of the bone pin to the placement of the intramedullary nail in the medullary cavity.

[0097] VI. The stability of the locking structure formed by multiple bone pins with the bone through the bone plate and the guiding and locking device is better than that of the fracture fixed by multiple bone pins, reducing the risk of fracture displacement during the process of fixing the fracture through perspective and intramedullary nails, bone plates, external fixation frames, etc. It also reduces the risk of fracture displacement during the process of replacing intramedullary nails, bone plates, and external fixation frames.

[0098] VII. The bone pin can guide the position of the bone plate and the screw: when the position of the bone pin in the bone is good, the bone pin is replaced by the screw in sequence; when the position of the bone pin in the bone is not good, it can provide a reference for the implantation of the bone plate and the screw.

[0099] In this document, the terms "comprise", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, in addition to including the listed elements, other elements not explicitly listed can also be included.

[0100] In this article, the front, back, up, down and other orientation words are defined with the position of the parts in the drawing and the position of the parts relative to each other in the drawing, only to express the clear and convenient technical scheme. It should be understood that the use of the orientation words should not limit the scope of the application.

[0101] In the case of no conflict, the above-mentioned embodiments and features in the embodiments can be combined with each other.

[0102] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A guide and locking device, characterized in that The utility model relates to a kind of locking pipe and locking piece, which includes guiding locking pipe (11) and locking piece (12), the guiding locking pipe (11) is hollow tubular structure, the guiding locking pipe (11) has locking end (111) and connecting end (112), at least one strip slot (113) is provided on the pipe wall of the guiding locking pipe (11), the strip slot (113) is communicated with the lumen of the guiding locking pipe (11), the strip slot (113) penetrates the locking end (111) of the guiding locking pipe (11), the locking piece (12) is arranged on the guiding locking pipe (11), the locking piece (12) can drive the pipe wall of the locking end (111) of the guiding locking pipe (11) to tighten inward; The locking piece (12) is hollow tubular structure, the locking piece (12) is sleeved on the guiding locking pipe (11), the locking piece (12) can be driven to move in the axial direction on the guiding locking pipe (11), and during the movement of the locking piece (12), the locking piece (12) can drive the pipe wall of the locking end (111) of the guiding locking pipe (11) to tighten inward; The lumen of the locking piece (12) includes cylindrical cavity portion (121) and conical cavity portion (122) in the axial direction, the cylindrical cavity portion (121) is communicated with the small-diameter port of the conical cavity portion (122), the hole diameter of the cylindrical cavity portion (121) is smaller than the outer diameter of the locking end (111) of the guiding locking pipe (11), the locking piece (12) is sleeved on the locking end (111) of the guiding locking pipe (11) by the large-diameter port of the conical cavity portion (122), the locking piece (12) can be driven to move towards the connecting end (112) of the guiding locking pipe (11), and during the movement of the locking piece (12), the conical cavity portion (122) and the cylindrical cavity portion (121) drive the pipe wall of the locking end (111) of the guiding locking pipe (11) to tighten inward; Further comprising snap ring (13), the snap ring (13) is sleeved on the guiding locking pipe (11), the snap ring (13) is located on the side of the locking piece (12) away from the connecting end (112) of the guiding locking pipe (11), when the locking piece (12) is driven to move away from the connecting end (112) of the guiding locking pipe (11), the locking piece (12) drives the snap ring (13) to move away from the connecting end (112) of the guiding locking pipe (11), and during the movement of the snap ring (13), the snap ring (13) can drive the pipe wall of the locking end (111) of the guiding locking pipe (11) to tighten inward.

2. The guide and locking device of claim 1, wherein The outer side of the pipe wall of the guide locking pipe (11) is provided with a step structure (115), the strip-shaped slot (113) penetrates through the step structure (115), the locking piece (12) is located at one side of the step structure (115), the outer diameter of the step structure (115) is greater than the inner diameter of the locking piece (12), the locking piece (12) can be driven to move to the step structure (115), and during the movement of the locking piece (12), the locking piece (12) extrudes the step structure (115) to drive the pipe wall of the locking end (111) of the guide locking pipe (11) to be tightened inward.

3. Guiding and locking device according to claim 1 or 2, characterized in that The locking piece (12) is in threaded connection with the guide locking pipe (11).

4. Guiding and locking device according to claim 1 or 2, characterized in that A locking hole is arranged on the pipe wall of the locking piece (12), the locking hole is in communication with the lumen of the locking piece (12), a locking piece is arranged in the locking hole, and the locking piece can be driven to tighten the guide locking pipe (11), so as to lock the locking piece (12) and the guide locking pipe (11).

5. The guide and locking device of claim 1, wherein, A clamping convex structure (116) is arranged on the outer wall of the locking end (111) of the guide locking pipe (11) close to the end portion, the clamping ring (13) is located between the locking piece (12) and the clamping convex structure (116), and the pipe wall of the locking end (111) of the guide locking pipe (11) can be tightened to an outer diameter of the clamping convex structure (116) that is not greater than an inner diameter of the clamping ring (13).

6. The guide and lock device of claim 1, wherein, The locking piece (12) is a clamping piece, the locking piece (12) is sleeved on the guide locking pipe (11), and the locking piece (12) can drive the pipe wall of the locking end (111) to be tightened inward when the locking piece (12) is clamped.

7. The guide and lock device of claim 1, wherein A threaded structure is arranged on the pipe wall of the connecting end (112) of the guide locking pipe (11).

8. A bone fracture fixation system, characterized by, It comprises a bone plate (2), a bone needle (3) and the guide locking device (1) in any one of claims 1-7, the bone plate (2) is provided with a fixing through hole (21), the connecting end (112) of the guide locking pipe (11) is fixedly connected with the fixing through hole (21), the guide locking pipe (11) is arranged perpendicularly to the bone plate (2), the bone needle (3) is arranged in the lumen of the guide locking pipe (11), and the locking piece (12) can drive the pipe wall of the locking end (111) to be tightened inward and clamp the bone needle (3).

9. The bone fracture fixation system according to claim 8, wherein, The bone needle (3) is further provided with a limiting piece (4).

10. The bone fracture fixation system according to claim 8, wherein, It further comprises a special tool (5), the special tool (5) comprises a handle (51) and a tool rod portion (52), one end of the tool rod portion (52) is connected with the handle (51), and the other end of the tool rod portion (52) is provided with an acting structure (53).

Images