Non-invasive bone marrow cavity clamp and clamp-type biaxial traction reduction external fixator

Abstract

The present invention relates to the field of medical devices, and in particular, to a non-invasive intramedullary cavity clamp and a clamp-type biaxial traction reduction external fixator. The first bone needle and the second bone needle of the non-invasive intramedullary cavity clamp are distributed on both sides of the patient's upper limb or lower limb and are coaxial; the locking assembly is connected to the first clamp arm and the second clamp arm to limit the relative movement between the first clamp arm and the second clamp arm. The non-invasive intramedullary cavity clamp and the clamp-type biaxial traction reduction external fixator are simple and quick to operate, and the operation time is significantly shortened compared with the traditional external fixator. Too many auxiliary instruments such as electric drills are not used, and the intramedullary cavity is not passed, so that the infection of the fracture can be avoided to the greatest extent. In addition, the non-invasive intramedullary cavity clamp-type biaxial traction reduction external fixator can adjust the fixed position of the fracture with poor alignment in the later stage, and can perform multifunctional application of pressurized traction, which is more convenient for the treatment of fractures caused by group injuries and public disasters, effectively reducing the disability rate, and increasing the treatment efficiency and success rate.

Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to a non-invasive bone marrow cavity clamp and a clamp-type biaxial traction reduction external fixator. Background Art

[0002] When a limb shaft fracture occurs, an external fixator is generally used for fixation. However, a traditional external fixator requires a Schanz nail (bone traction pin) to pass through the medullary cavity from one cortical bone to the other cortical bone, thereby causing damage to the medullary cavity. Summary of the invention

[0003] The objectives of the present invention include, for example, providing a non-invasive medullary cavity clamp and a clamp-type biaxial traction reduction external fixator, which have a simple structure and are easy to operate. During the fixation process, not too many auxiliary instruments such as electric drills are required, thereby avoiding damage to the medullary cavity, thereby avoiding fracture infection to the greatest extent, making it more convenient to treat fractures caused by mass injuries and public disasters, effectively reducing the disability rate, and increasing the treatment efficiency and success rate.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, the present invention provides a non-invasive intramedullary cavity clamp, comprising a first clamp arm, a second clamp arm, a first bone pin, a second bone pin, and a locking assembly;

[0006] One end of the first clamp arm is hinged to one end of the second clamp arm; the first bone needle is connected to the other end of the first clamp arm, and the second bone needle is connected to the other end of the second clamp arm; the first bone needle and the second bone needle are both used to abut against the cortical bone of the patient's upper limb or lower limb; the first bone needle and the second bone needle are distributed on both sides of the patient's upper limb or lower limb and are coaxial;

[0007] The locking assembly is connected to the first clamp arm and the second clamp arm to limit the relative movement between the first clamp arm and the second clamp arm.

[0008] In an optional embodiment, one end of the first clamp arm used for connecting with the first bone needle is provided with a mounting tube, and the first bone needle is threadedly connected with the mounting tube;

[0009] The second bone needle is fixedly connected to the second clamping arm.

[0010] In an optional embodiment, the locking assembly includes a locking rod, a locking member, and a clamping member;

[0011] The first clamp arm is provided with a through hole which is gap-matched with the locking rod; the locking member is threadedly connected to the locking rod; the clamping member is connected to the second clamp arm; the clamping member includes a hook, and a hanging rod for clamping with the hook is provided at one end of the locking member facing the clamping member;

[0012] Along the axis direction of the locking rod, the locking member and the clamping member are respectively located on both sides of the first clamping arm;

[0013] When the hook is clamped with the hanging rod, the locking piece is used to abut against the first clamping arm to limit the movement of the locking rod toward the clamping piece and to limit the relative rotation between the first clamping arm and the second clamping arm.

[0014] In a second aspect, the present invention provides a non-invasive bone marrow cavity clamp-type biaxial traction reduction external fixator, which comprises a telescopic assembly and two of the above-mentioned non-invasive bone marrow cavity clamps; the two non-invasive bone marrow cavity clamps are arranged in parallel;

[0015] The two ends of the telescopic component along the telescopic direction are respectively connected with two non-invasive bone marrow cavity clamps.

[0016] In an optional embodiment, the telescopic assembly includes a telescopic rod body and a limiter;

[0017] The two ends of the telescopic rod along its telescopic direction are respectively connected with two non-invasive bone marrow cavity clamps;

[0018] The limiting member is connected to the telescopic rod body and is used for limiting the extension and retraction of the telescopic rod body.

[0019] In an optional embodiment, the telescopic rod body includes a sleeve and a movable rod;

[0020] The movable rod is coaxial with the sleeve and is slidably connected; along the axis direction of the movable rod, two ends of the movable rod and the sleeve that are away from each other are respectively connected with two non-invasive bone marrow cavity clamps.

[0021] In an optional embodiment, the telescopic rod body further includes a rotating gear; along the axis direction of the movable rod, the movable rod is provided with a rack; the rotating gear is rotatably connected to the sleeve and meshes with the rack;

[0022] The limiting member is connected to the sleeve, and the limiting member is used to abut against the rotating gear or the rack to limit the sliding of the movable rod relative to the sleeve;

[0023] The outer circumferential surface of the sleeve is provided with a first opening and a second opening. The first opening is used for the limiter to abut against the rack in the sleeve; the second opening is used for the rotating gear to mesh with the rack in the sleeve.

[0024] In an optional embodiment, the telescopic rod body further includes a mounting seat and an adjusting knob;

[0025] The mounting seat is connected to the sleeve and is located at one end of the sleeve facing the movable rod, and the rotating gear is rotatably connected to the mounting seat;

[0026] The adjusting knob is rotatably connected to the mounting seat and is transmission-connected to the rotating gear. The adjusting knob is used to drive the rotating gear to rotate relative to the mounting seat under the action of external force.

[0027] In an optional embodiment, the limiting member includes a limiting clamping strip, a limiting sleeve and a limiting elastic member; the limiting clamping strip and the limiting sleeve are both rotatably connected to the mounting seat;

[0028] The limit card strip is used to abut against the rack; the limit sleeve is used to abut against the limit card strip, so as to limit the rotation of the limit card strip relative to the mounting seat when the limit card strip abuts against the rack;

[0029] The limiting elastic member is connected to the rotation connection between the limiting clamping strip and the mounting seat; the limiting elastic member is used to make the limiting clamping strip have a tendency to be out of contact with the rack.

[0030] In an optional embodiment, the non-invasive intramedullary clamp-type biaxial traction reduction external fixator further comprises at least one stabilizing rod group;

[0031] The stabilizing rod assembly includes a stabilizing rod and two fixing seats; the two fixing seats are respectively connected to two non-invasive bone marrow cavity clamps, and both ends of the stabilizing rod are respectively connected to the two fixing seats;

[0032] The fixing seat comprises a main body, a locking sleeve and a supporting sleeve;

[0033] The main body is connected with the first clamp arm or the second clamp arm, the main body is provided with a first through slot, and the stabilizing rod is accommodated in the first through slot; the abutting sleeve is sleeved on the main body, the locking sleeve is threadedly connected with the main body, and the locking sleeve is used to abut against the abutting sleeve, so that the abutting sleeve abuts against the stabilizing rod;

[0034] The main body is provided with a second through slot, which cooperates with the first clamp arm or the second clamp arm; the main body is provided with a mounting hole, which is connected with the second through slot and passes through the main body; the fixing seat also includes a connecting bolt, which is threadedly connected with the mounting hole to limit the movement of the main body relative to the first clamp arm or the second clamp arm.

[0035] The beneficial effects of the embodiments of the present invention include:

[0036] During the installation process of the non-invasive bone cavity clamp, since one end of the first clamp arm is hinged to one end of the second clamp arm, the non-invasive bone cavity clamp can be unfolded by rotating the first clamp arm and the second clamp arm to adjust the positions of the first bone needle and the second bone needle, and make them located on both sides of the patient's upper limb or lower limb;

[0037] Subsequently, after the first bone needle and the second bone needle abut against the cortical bone of the patient's upper or lower limb, they are connected to the first clamp arm and the second clamp arm through a locking assembly to limit the relative movement between the first clamp arm and the second clamp arm, thereby maintaining the connection with the patient's upper or lower limb.

[0038] Since the first bone needle is connected to the other end of the first clamp arm, and the second bone needle is connected to the other end of the second clamp arm; therefore, after the non-invasive bone cavity clamp is connected to the patient's upper limb or lower limb, the main structure of the non-invasive bone cavity clamp is relatively located on one side of the first bone needle and the second bone needle, so that in this way, the non-invasive bone cavity clamp can be avoided from being distributed around the first bone needle and the second bone needle, that is, the non-invasive bone cavity clamp is relatively located on one side of the patient, so that the non-invasive bone cavity clamp can be avoided from interfering with the patient's range of movement and reducing the interference with other structures when the patient uses the non-invasive bone cavity clamp; in addition, during use, the first bone needle and the second bone needle both abut against the cortical bone of the patient's upper limb or lower limb, so as to avoid damage to the medullary cavity of the patient's upper limb or lower limb.

[0039] In summary, the non-invasive intramedullary cavity clamp and clamp-type biaxial traction reduction external fixator are simple and quick to operate, and the operation time is significantly shortened compared with the traditional external fixator. Too many auxiliary instruments such as electric drills are not used, and the intramedullary cavity is not passed through, thereby avoiding fracture infection to the greatest extent. Moreover, the non-invasive intramedullary cavity clamp-type biaxial traction reduction external fixator can adjust the malaligned fixed position of the fracture in the later stage, and can perform multifunctional applications of pressurized traction, which is more convenient for the treatment of fractures caused by mass injuries and public disasters, effectively reduces the disability rate, and increases the treatment efficiency and success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 It is a schematic diagram of the structure of the non-invasive bone marrow cavity clamp abutting against the cortical bone in an embodiment of the present invention;

[0042] Figure 2 Schematic diagram of the structure of the non-invasive intramedullary cavity clamp in an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the structure of the hook and the hanging rod in an embodiment of the present invention;

[0044] Figure 4 It is a structural schematic diagram of a non-invasive intramedullary clamp-type biaxial traction reduction external fixator from a first perspective in an embodiment of the present invention;

[0045] Figure 5 It is a structural schematic diagram of the non-invasive intramedullary clamp-type biaxial traction reduction external fixator from a second viewing angle according to an embodiment of the present invention;

[0046] Figure 6 It is a structural schematic diagram of the internal and external telescopic components in an embodiment of the present invention;

[0047] Figure 7 It is a schematic diagram of the structure of the rotating gear and the adjusting knob in an embodiment of the present invention;

[0048] Figure 8 It is a schematic diagram of the structure of the limit card strip and the limit sleeve in the embodiment of the present invention;

[0049] Fig. 9 is a schematic diagram of the arrangement of the first opening and the second opening in an embodiment of the present invention;

[0050] Fig.10 It is a structural schematic diagram of a fixing base in an embodiment of the present invention;

[0051] Fig.11 It is a schematic diagram of the non-invasive bone marrow cavity clamping in the first step according to an embodiment of the present invention;

[0052] Fig.12 It is a schematic diagram of the non-invasive bone marrow cavity clamping in the second step according to an embodiment of the present invention;

[0053] Fig.13 It is a schematic diagram of the non-invasive bone marrow cavity clamping in the third step in an embodiment of the present invention;

[0054] Fig.14 It is a schematic diagram of the non-invasive bone marrow cavity clamping in the fourth step according to an embodiment of the present invention;

[0055] Fig.15 It is a schematic diagram of the non-invasive intramedullary clamp-type biaxial traction reduction external fixator in the fifth step according to an embodiment of the present invention;

[0056] Fig.16 It is a schematic diagram of the non-invasive intramedullary clamp-type biaxial traction reduction external fixator in the sixth step according to an embodiment of the present invention;

[0057] Fig.17 It is a schematic diagram of the non-invasive intramedullary clamp-type biaxial traction reduction external fixator in the eighth step according to an embodiment of the present invention.

[0058] Icons: 100-non-invasive intramedullary cavity clamp; 110-first clamp arm; 120-second clamp arm; 130-first bone needle; 140-second bone needle; 150-locking assembly; 11-cortical bone; 111-installation tube; 151-locking rod; 152-locking member; 153-clamping member; 154-hook; 155-hanging rod; 200-non-invasive intramedullary cavity clamp-type biaxial traction reduction external fixator; 210-telescopic assembly; 211-telescopic rod body; 212-limiting member; 213-sleeve ; 214-movable rod; 215-rotating gear; 216-rack; 217-mounting seat; 218-adjusting knob; 219-first opening; 221-second opening; 222-limiting clamping strip; 223-limiting sleeve; 224-limiting elastic member; 230-stabilizing rod group; 231-stabilizing rod; 232-fixing seat; 233-main body; 234-locking sleeve; 235-supporting sleeve; 236-first through slot; 237-second through slot; 238-mounting hole; 239-connecting bolt. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0060] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0062] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0063] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0064] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0065] Please refer to Figure 1 and Figure 2 , Figure 1 and Figure 2 The structure of the non-invasive bone marrow cavity clamp in the embodiment of the present invention is shown. The embodiment provides a non-invasive bone marrow cavity clamp 100, which includes a first clamp arm 110, a second clamp arm 120, a first bone needle 130, a second bone needle 140 and a locking assembly 150;

[0066] One end of the first clamp arm 110 is hinged to one end of the second clamp arm 120; the first bone needle 130 is connected to the other end of the first clamp arm 110, and the second bone needle 140 is connected to the other end of the second clamp arm 120; the first bone needle 130 and the second bone needle 140 are both used to abut against the cortical bone 11 of the patient's upper limb or lower limb; the first bone needle 130 and the second bone needle 140 are distributed on both sides of the patient's upper limb or lower limb and are coaxial;

[0067] The locking assembly 150 is connected to the first clamp arm 110 and the second clamp arm 120 to limit the relative movement between the first clamp arm 110 and the second clamp arm 120 .

[0068] It should be noted that after the first clamp arm 110 and the second clamp arm 120 come into contact with the affected limb, they are relatively located on one side of the affected limb and are in a semi-ring structure.

[0069] Please refer to Figure 1 and Figure 2 The working principle of the non-invasive intramedullary cavity clamp 100 is:

[0070] During the installation process of the non-invasive intramedullary cavity clamp 100, since one end of the first clamp arm 110 is hinged to one end of the second clamp arm 120, the non-invasive intramedullary cavity clamp 100 can be unfolded by rotating the first clamp arm 110 and the second clamp arm 120 to adjust the positions of the first bone needle 130 and the second bone needle 140 and make them located on both sides of the patient's upper limb or lower limb; then, after the first bone needle 130 and the second bone needle 140 abut against the cortical bone 11 of the patient's upper limb or lower limb, the locking assembly 150 is connected to the first clamp arm 110 and the second clamp arm 120 to limit the relative movement between the first clamp arm 110 and the second clamp arm 120, thereby maintaining the state of connection with the patient's upper limb or lower limb.

[0071] Since the first bone pin 130 is connected to the other end of the first clamp arm 110, and the second bone pin 140 is connected to the other end of the second clamp arm 120, after the non-invasive bone cavity clamp 100 is connected to the patient's upper limb or lower limb, the main body 233 structure of the non-invasive bone cavity clamp 100 is relatively located on one side of the first bone pin 130 and the second bone pin 140, so that the non-invasive bone cavity clamp 100 can be avoided from being distributed around the first bone pin 130 and the second bone pin 140, that is, the non-invasive bone cavity clamp 100 is relatively located on one side of the patient, so that the non-invasive bone cavity clamp 100 can be avoided from interfering with the patient's range of movement and reducing the interference of the patient with other structures during the use of the non-invasive bone cavity clamp 100; in addition, during use, the first bone pin 130 and the second bone pin 140 are both in contact with the cortical bone 11 of the patient's upper limb or lower limb, so as to avoid damage to the medullary cavity of the patient's upper limb or lower limb. In summary, the non-invasive intramedullary bone marrow clamp 100 and the non-invasive intramedullary bone marrow clamp type biaxial traction reduction external fixator 200 are simple and quick to operate, and the operation time is significantly shortened compared with the traditional external fixator. Too many auxiliary instruments such as electric drills are not used, and the intramedullary bone marrow cavity is not passed through, so that the infection of the fracture can be avoided to the greatest extent. Moreover, the non-invasive intramedullary bone marrow clamp type biaxial traction reduction external fixator 200 can adjust the fixed position of the fracture due to poor alignment in the later stage, and can perform multifunctional application of pressurized traction, which is more convenient for the treatment of fractures caused by mass injuries and public disasters, effectively reduces the disability rate, and increases the treatment efficiency and success rate.

[0072] For further information, please refer to Figure 1 and Figure 2 In the present embodiment, when installing the first bone needle 130 and the second bone needle 140, one or more of the first bone needle 130 and the second bone needle 140 can be movably connected to the non-invasive bone cavity clamp 100. In the present embodiment, the first bone needle 130 is movably connected to the first clamp arm 110, and the second bone needle 140 is fixedly connected to the second clamp arm 120. In order to make the first bone needle 130 movably connected to the first clamp arm 110, a mounting tube 111 is provided at one end of the first clamp arm 110 for connecting with the first bone needle 130, and the first bone needle 130 is threadedly connected to the mounting tube 111. Therefore, when adjusting the length of the first bone needle 130 relative to the first clamp arm 110, the first bone needle 130 can be rotated relative to the mounting tube 111, so that the first bone needle 130 can move toward the direction of the second bone needle 140, or move away from the direction of the second bone needle 140.

[0073] Please refer to Figure 1-Figure 3 , Figure 3The structure of the hook and the hanging rod in the embodiment of the present invention is shown. The first bone needle 130 and the second bone needle 140 of the non-invasive bone cavity clamp 100 are both in contact with the cortical bone 11 of the patient's upper limb or lower limb, and after being coaxial, in order to maintain the installation state of the first bone needle 130 and the second bone needle 140, a method of limiting the movement between the first clamp arm 110 and the second clamp arm 120 can be adopted. Specifically, in this embodiment, the role of the locking member 152 is to limit the relative rotation between the first clamp arm 110 and the second clamp arm 120, and the locking assembly 150 may include a locking rod 151, a locking member 152 and a clamping member 153;

[0074] The locking member 152 is connected to the first clamp arm 110, and the clamping member 153 is connected to the second clamp arm 120; the locking rod 151 is connected to the locking member 152, and when the locking rod 151 is clamped with the clamping member 153, the relative rotation between the first clamp arm 110 and the second clamp arm 120 is restricted. That is, the locking rod 151 extends from the first clamp arm 110 to the second clamp arm 120, and one end of the locking rod 151 can be clamped with the clamping member 153, and the locking rod 151 is connected to the first clamp arm 110, so that when the movement of the locking rod 151 and the first clamp arm 110 is restricted by the locking member 152 and the clamping member 153 is clamped, the locking rod 151 can restrict the relative movement between the first clamp arm 110 and the second clamp arm 120, thereby achieving the function of maintaining the installation state of the first bone needle 130 and the second bone needle 140.

[0075] When the locking rod 151 is connected to the first clamp arm 110, the first clamp arm 110 is provided with a through hole that is clearance-matched with the locking rod 151; and the locking piece 152 is threadedly connected to the locking rod 151, and along the axial direction of the locking rod 151, the locking piece 152 and the clamping piece 153 are respectively located on both sides of the first clamp arm 110; the locking piece 152 is used to abut against the first clamp arm 110 to limit the movement of the locking rod 151 toward the clamping piece 153.

[0076] Thus, since the locking member 152 and the clamping member 153 are relatively located on both sides of the first clamp arm 110, when the locking member 152 abuts against the first clamp arm 110, the movement of the locking rod 151 toward the clamping member 153 can be restricted; when the locking rod 151 is clamped with the clamping member 153, the clamping member 153 includes a hook 154, and the end of the locking member 152 facing the clamping member 153 is provided with a hanging rod 155 for clamping with the hook 154. In order to make the hanging rod 155 on the locking rod 151 clamped with the hook 154, the locking rod 151 is used to fit the clearance between the through hole, so that the position of the locking rod 151 can be adjusted, so that the locking rod 151 can be tilted relative to the first clamp arm 110, so as to facilitate the clamping of the locking rod 151 with the clamping member 153.

[0077] Based on the above, please refer to Figure 1-Figure 5 , Figure 4 and Figure 5 The structure of the non-invasive bone marrow cavity clamp-type biaxial traction reduction external fixator in the embodiment of the present invention is shown. The present invention also provides a non-invasive bone marrow cavity clamp-type biaxial traction reduction external fixator 200. The non-invasive bone marrow cavity clamp-type biaxial traction reduction external fixator 200 comprises a telescopic assembly 210 and two of the above-mentioned non-invasive bone marrow cavity clamps 100; the two non-invasive bone marrow cavity clamps 100 are arranged in parallel;

[0078] The two ends of the telescopic assembly 210 along its telescopic direction are respectively connected to two non-invasive intramedullary cavity clamps 100 .

[0079] Please refer to Figure 1-Figure 5 During use, the non-invasive intramedullary clamp type biaxial traction reduction external fixator 200 can fix the backbone by placing two non-invasive intramedullary clamps 100 in contact with the cortical bone 11 of the upper or lower limbs, and the fracture of the upper or lower limb is located between the two non-invasive intramedullary clamps 100. Moreover, the extension of the telescopic component 210 along its telescopic direction can also play a traction role.

[0080] Please refer to Figure 1-Figure 9 , Figure 6-Figure 9 The structure of the telescopic assembly in the embodiment of the present invention is shown. In the embodiment, when the telescopic assembly 210 is set, its function is to ensure the relative position between the two non-invasive bone marrow cavity clamps 100. Specifically, the telescopic assembly 210 includes a telescopic rod 211 and a limiter 212; the two ends of the telescopic rod 211 along its telescopic direction are respectively connected to the two non-invasive bone marrow cavity clamps 100; the limiter 212 is connected to the telescopic rod 211 and is used to limit the telescopic extension of the telescopic rod 211. Therefore, during use, the telescopic rod 211 can adapt to the interval between the two non-invasive bone marrow cavity clamps 100 through the telescopic extension, and the limiter 212 can be set to limit the telescopic extension of the telescopic rod 211 after the interval between the two non-invasive bone marrow cavity clamps 100 is determined, thereby maintaining the use stability of the non-invasive bone marrow cavity clamp-type dual-axis traction reduction external fixator 200.

[0081] It should be noted that, in the embodiment of the present invention, the telescopic assembly 210 includes a plurality of telescopic rods 211 and a plurality of stoppers 212, and the plurality of telescopic rods 211 are connected to the plurality of stoppers 212 in a one-to-one correspondence, and the plurality of telescopic rods 211 are arranged around the outer peripheral contour of the non-invasive intramedullary cavity clamp 100. In the present embodiment, two telescopic rods 211 are provided, wherein the two ends of one telescopic rod 211 are respectively connected to the two first clamp arms 110, and the two ends of the other telescopic rod 211 are respectively connected to the two second clamp arms 120, and the two telescopic rods 211 are parallel.

[0082] In this embodiment, when the telescopic rod body 211 is set, in order to enable the telescopic rod body 211 to be telescopic, the telescopic rod body 211 includes a sleeve 213 and a movable rod 214; wherein the movable rod 214 is coaxial with the sleeve 213 and is slidably connected; along the axial direction of the movable rod 214, the two ends of the movable rod 214 and the sleeve 213 that are away from each other are respectively connected to two non-invasive bone marrow cavity clamps 100.

[0083] In order to enable the limiter 212 to limit the extension and retraction of the telescopic rod 211, the telescopic rod 211 further includes a rotating gear 215; the movable rod 214 is provided with a rack 216 along the axis direction of the movable rod 214; the rotating gear 215 is rotatably connected to the sleeve 213 and meshes with the rack 216; the limiter 212 is connected to the sleeve 213, and the limiter 212 is used to abut against the rotating gear 215 or the rack 216 to limit the sliding of the movable rod 214 relative to the sleeve 213. It should be noted that in this embodiment, the limiter 212 abuts against the rack 216 to limit the sliding of the movable rod 214 relative to the sleeve 213.

[0084] Therefore, during use, the extension and retraction of the telescopic rod body 211 can be limited by the abutment between the limit member 212 and the rack 216 or the rotating gear 215; in addition, it should be noted that by the setting of the rotating gear 215, the movable rod 214 can be driven to move relative to the sleeve 213 by rotating the rotating gear 215 when the rotating gear 215 is engaged with the rack 216, thereby accurately controlling the extension and retraction of the telescopic rod body 211. Specifically, in order to facilitate the control of the extension and retraction of the telescopic rod, in an optional embodiment, the telescopic rod body 211 also includes a mounting seat 217 and an adjusting knob 218; wherein the mounting seat 217 is connected to the sleeve 213 and is located at one end of the sleeve 213 facing the movable rod 214, and the rotating gear 215 is rotatably connected to the mounting seat 217; and the adjusting knob 218 is rotatably connected to the mounting seat 217 and is transmission-connected to the rotating gear 215, and the adjusting knob 218 is used to drive the rotating gear 215 to rotate relative to the mounting seat 217 under the action of an external force.

[0085] Since the mounting seat 217 is connected to the sleeve 213 and is located on the outer periphery of the sleeve 213, in order to prevent the sleeve 213 from interfering with the meshing of the rotating gear 215 and the rack 216, and the abutment between the limit member 212 and the rack 216, a first opening 219 and a second opening 221 are provided on the outer periphery of the sleeve 213. The first opening 219 is used for the abutment of the limit member 212 and the rack 216 in the sleeve 213; the second opening 221 is used for the meshing of the rotating gear 215 and the rack 216 in the sleeve 213.

[0086] In this embodiment, when setting the limit member 212, the limit member 212 may include a limit strip 222 and a limit sleeve 223; the limit strip 222 and the limit sleeve 223 are both rotatably connected to the mounting seat 217; the limit strip 222 is used to abut against the rack 216; the limit sleeve 223 is used to abut against the limit strip 222 to limit the rotation of the limit strip 222 relative to the mounting seat 217 when the limit strip 222 abuts against the rack 216.

[0087] Moreover, the limiting member 212 further includes a limiting elastic member 224 , which is connected to the rotational connection between the limiting clamping strip 222 and the mounting seat 217 ; the limiting elastic member 224 is used to make the limiting clamping strip 222 have a tendency to disengage from the abutment with the rack 216 . Specifically, when the limiting elastic member 224 is provided, the limiting elastic member 224 can be a torsion spring, the purpose of which is to make the limiting clamping strip 222 have a tendency to rotate in the direction of disengaging from the abutment with the rack 216; thus, when the limiting clamping strip 222 abuts against the rack 216 under the action of external force, the limiting sleeve 223 is rotated so that the limiting sleeve 223 abuts against the limiting clamping strip 222, thereby limiting the rotation of the limiting clamping strip 222 relative to the mounting seat 217 to keep the movement of the rack 216 in a restricted state; and when the limiting sleeve 223 disengages from the limiting clamping strip 222, at this time, under the action of the limiting elastic member 224, the limiting clamping strip 222 rotates in the direction of disengaging from the abutment with the rack 216, thereby disengaging from the rack 216, and at this time, the rack 216 can rotate relative to the sleeve 213 under the action of the rotating gear 215.

[0088] For further information, please refer to Figure 1-Figure 10 , Fig.10 The structure of the fixing seat in the embodiment of the present invention is shown. Based on the above content, in the present embodiment, in order to improve the use stability of the non-invasive intramedullary cavity clamping biaxial traction reduction external fixator 200 during use, the non-invasive intramedullary cavity clamping biaxial traction reduction external fixator 200 further includes at least one stabilizing rod group 230;

[0089] The stabilizing rod group 230 includes a stabilizing rod 231 and two fixing seats 232; the two fixing seats 232 are respectively connected to two non-invasive bone marrow cavity clamps 100, and the two ends of the stabilizing rod 231 are respectively connected to the two fixing seats 232. It should be noted that in the drawings of the present invention, the connection between the non-invasive bone marrow cavity clamp-type biaxial traction reduction external fixator 200 and the lower limb is used as an example for explanation; the stabilizing rod 231 has two functions, one is to strengthen the stability of the two non-invasive bone marrow cavity clamps 100, and the other is to place a pad at a suitable position of the stabilizing rod 231 to adjust the dislocation of the broken bones so that the broken bones can be accurately reduced. Furthermore, when arranging a plurality of stabilizing rod groups 230, in order to enable the stabilizing rod groups 230 to provide uniform support for the two non-invasive bone marrow cavity clamps 100, so as to improve the stability of the non-invasive bone marrow cavity clamp-type biaxial traction reduction external fixator 200, the plurality of stabilizing rod groups 230 are arranged around the outer contour of the non-invasive bone marrow cavity clamp 100; and in the present embodiment, two stabilizing rod groups 230 are arranged, wherein the two fixing seats 232 of one stabilizing rod group 230 are respectively connected to the two first clamp arms 110, and the two fixing seats 232 of the other stabilizing rod group 230 are respectively connected to the two second clamp arms 120, and the two stabilizing rods 231 are arranged in parallel; and the two stabilizing rods 231 can also be parallel to the telescopic rod body 211.

[0090] When setting the fixing seat 232, in order to enable the fixing seat 232 to be connected to the stabilizing rod 231 and also to be fixed to the non-invasive intramedullary cavity clamp 100, the fixing seat 232 may include a main body 233, a locking sleeve 234 and a supporting sleeve 235; wherein the main body 233 is connected to the first clamp arm 110 or the second clamp arm 120, the main body 233 is provided with a first through groove 236, and the stabilizing rod 231 is accommodated in the first through groove 236; the supporting sleeve 235 is sleeved on the main body 233, the locking sleeve 234 is threadedly connected to the main body 233, and the locking sleeve 234 is used to abut against the supporting sleeve 235, so that the supporting sleeve 235 abuts against the stabilizing rod 231. Therefore, when the main body 233 is connected to the first clamp arm 110 or the second clamp arm 120, the stabilizing rod 231 is accommodated in the first through groove 236, and the supporting sleeve 235 is sleeved on the main body 233, so that the locking sleeve 234 is threadedly connected to the main body 233, and the supporting sleeve 235 is located between the main body 233 and the locking sleeve 234 at this time; then, the locking sleeve 234 is rotated so that the locking sleeve 234 abuts against the supporting sleeve 235, and the locking sleeve 234 is continued to be rotated so that the supporting sleeve 235 moves toward the direction of the stabilizing rod 231. After the supporting sleeve 235 abuts against the stabilizing rod 231, the movement of the stabilizing rod 231 relative to the main body 233 can be restricted.

[0091] It should be noted that when the stabilizing rod 231 cooperates with the first through slot 236, the stabilizing rod 231 passes through the first through slot 236, so that the abutting sleeve 235 sleeved on the main body 233 can abut against the stabilizing rod 231 located at the front end and the rear end of the extending direction of the first through slot 236. Moreover, when the abutting sleeve 235 abuts against the stabilizing rod 231, in order to increase the contact area between the abutting sleeve 235 and the stabilizing rod 231, the abutting sleeve 235 is provided with an arc groove for surface contact with the stabilizing rod 231.

[0092] When connecting the main body 233 with the first clamp arm 110 or the second clamp arm 120, the main body 233 is provided with a second through slot 237, and the second through slot 237 cooperates with the first clamp arm 110 or the second clamp arm 120; and in order to fix the main body 233 with the first clamp arm 110 or the second clamp arm 120, the main body 233 is provided with a mounting hole 238, and the mounting hole 238 is connected to the second through slot 237 and passes through the main body 233; the fixing seat 232 also includes a connecting bolt 239, and the connecting bolt 239 is threadedly connected to the mounting hole 238 to limit the movement of the main body 233 relative to the first clamp arm 110 or the second clamp arm 120. It should be noted that when the second through slot 237 cooperates with the first clamp arm 110 or the second clamp arm 120, the opposite side walls of the second through slot 237 are in contact with the two opposite side wall surfaces of the first clamp arm 110 or the second clamp arm 120, and through the locking action of the connecting bolt 239, the opposite side walls of the second through slot 237 are tightly fitted with the two opposite side wall surfaces of the first clamp arm 110 or the second clamp arm 120, thereby preventing the main body 233 from moving relative to the first clamp arm 110 or the second clamp arm 120.

[0093] Please refer to Figure 1-Figure 17 , Figure 11-Figure 17 The following are the steps for using the non-invasive intramedullary clamp type biaxial traction reduction external fixator according to an embodiment of the present invention. Based on the above content, the steps for using the non-invasive intramedullary clamp type biaxial traction reduction external fixator 200 are as follows:

[0094] Step 1: Please refer to Fig.11 First, an opening is made in the upper limb or lower limb of the patient who needs the non-invasive bone marrow cavity clamp 100, and then a cortical bone-breaking tool is used to break the surface layer of the cortical bone 11, and the second bone needle 140 connected to the second clamp arm 120 is inserted through the opening so that the end of the second bone needle 140 is inserted into the broken part of the cortical bone 11.

[0095] Step 2: Please refer to Fig.12 , make an incision on the opposite side of the opened position, break the bone, screw the first bone needle 130 into the mounting tube 111, adjust it to a proper position, close the first clamp arm 110 and the second clamp arm 120, and insert the end of the first bone needle 130 into the opening of the broken bone;

[0096] Step 3: Please refer to Fig.13 , and adjust the depth positions of the first bone needle 130 and the second bone needle 140 again, so that after the first clamping arm 110 and the second clamping arm 120 are clamped, the first bone needle 130 and the second bone needle 140 on both sides are in a coaxial state.

[0097] Step 4: Please refer to Fig.14 , engage one end of the locking rod 151 provided with the hanging rod 155 with the hook 154, and rotate the locking member 152 so that the locking member 152 abuts against the first clamping arm 110;

[0098] Step 5: Please refer to Fig.15 , using the above steps, installing another set of non-invasive intramedullary cavity clamps 100;

[0099] Step 6: Please refer to Fig.16 , install the telescopic assembly 210, adjust the length of the telescopic rod 211 to make it consistent with the distance between the two non-invasive bone marrow cavity clamps 100; connect the ends of the sleeve 213 and the movable rod 214 of the telescopic rod 211 that are away from each other to the two non-invasive bone marrow cavity clamps 100, and fix them;

[0100] Step 7: Overcome the elastic force of the limiting elastic member 224 so that the limiting clip 222 abuts against the rack 216 , and rotate the limiting sleeve 223 so that the limiting sleeve 223 abuts against the limiting clip 222 , thereby limiting the rotation of the limiting clip 222 , thereby limiting the extension and retraction of the telescopic rod 211 .

[0101] Step 8: Please refer to Fig.17 , install the stabilizing rod group 230, connect the two fixing seats 232 of the same stabilizing rod group 230 to the two non-invasive bone marrow cavity clamps 100 respectively, and fix them to the non-invasive bone marrow cavity clamps 100; put the stabilizing rod 231 into the two first channels, respectively sleeve the two abutting sleeves 235 on the two main bodies 233, install two locking sleeves 234, and rotate the two locking sleeves 234 so that the two locking sleeves 234 are respectively abutted against the two abutting sleeves 235, and the abutting sleeves 235 are tightly abutted against the stabilizing rod 231, thereby limiting the movement of the stabilizing rod 231.

[0102] In summary, the advantages of the non-invasive intramedullary clamp-type biaxial traction reduction external fixator 200 include:

[0103] 1. Non-invasive medullary cavity: Traditional external fixators require Schanz nails (bone traction pins) to pass through the medullary cavity from one cortical bone 11 to the other cortical bone 11, causing damage to the medullary cavity. The present invention uses a non-invasive medullary cavity clamp 100 for fixation, which only requires clamping the surface of the bilateral cortical bones 11, without causing damage to the medullary cavity.

[0104] 2. Easy to use, replacing the traditional circular or semi-circular fixation, the fixation operation is flexible and fast. When the traditional external fixator is fixed with Schanz nails (bone traction pins), it is necessary to use electric tools to drill and expand holes, and a large number of spare tools need to be prepared, which is cumbersome to operate. The non-invasive bone marrow cavity clamp-type biaxial traction reduction external fixator 200 has a simple structure and can optimize the operation steps. Compared with the fixation time of traditional circular and straight external fixators, it can save two-thirds of the time, truly achieve efficient fixation, and save precious time for rescuing patients.

[0105] 3. Rapid adjustment: by rotating the gear 215 and the rack 216, rapid expansion and traction can be achieved, replacing the traditional screw nut adjustment, and the adjustment is accurate and fast. Moreover, compared with the traditional external adjustment, there is no need to repeatedly adjust the nut with a wrench. The traction can be expanded on both sides of the affected limb at the same time, and a single person can operate it by simply rotating the knob.

[0106] 4. The first clamp arm 110 and the second clamp arm 120 are located on one side of the affected limb, and a semi-ring structure is used to replace the traditional circular ring structure, which is conducive to the patient's affected limb contacting the bed board without being suspended in the air, thereby improving the comfort of the affected limb.

[0107] 5. No Schanz nails (bone traction pins) are needed, which saves costs, reduces the use of consumables, and reduces surgical costs.

[0108] 6. The hook 154 is used to lock and pressurize the non-invasive intramedullary cavity clamp 100, which is convenient for disassembly.

[0109] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A non-invasive intramedullary cavity clamp, characterized in that: The non-invasive bone marrow cavity clamp comprises a first clamp arm, a second clamp arm, a first bone needle, a second bone needle and a locking assembly; One end of the first clamp arm is hinged to one end of the second clamp arm; the first bone needle is connected to the other end of the first clamp arm, and the second bone needle is connected to the other end of the second clamp arm; the first bone needle and the second bone needle are both used to abut against the cortical bone of the patient's upper limb or lower limb; the first bone needle and the second bone needle are distributed on both sides of the patient's upper limb or lower limb and are coaxial; The locking assembly is connected to the first clamp arm and the second clamp arm to limit the relative movement between the first clamp arm and the second clamp arm; One end of the first clamp arm used for connecting with the first bone needle is provided with a mounting tube, and the first bone needle is threadedly connected with the mounting tube; The second bone needle is fixedly connected to the second clamp arm; The locking assembly comprises a locking rod, a locking member and a clamping member; The first clamp arm is provided with a through hole matched with the locking rod; the locking member is threadedly connected to the locking rod; the clamping member is connected to the second clamp arm; the clamping member includes a hook, and one end of the locking rod facing the clamping member is provided with a hanging rod for clamping with the hook; Along the axial direction of the locking rod, the locking member and the clamping member are respectively located on two sides of the first clamping arm; When the hook is engaged with the hanging rod, the locking member is used to abut against the first clamping arm to limit the movement of the locking rod toward the engaging member and to limit the relative rotation between the first clamping arm and the second clamping arm.

2. A non-invasive intramedullary clamp-type biaxial traction reduction external fixator, characterized in that: The non-invasive intramedullary cavity clamp-type biaxial traction reduction external fixator comprises a telescopic assembly and two non-invasive intramedullary cavity clamps as claimed in claim 1; the two non-invasive intramedullary cavity clamps are arranged in parallel; The two ends of the telescopic component along its telescopic direction are respectively connected to the two non-invasive bone marrow cavity clamps.

3. The non-invasive intramedullary clamp-type biaxial traction reduction external fixator according to claim 2, characterized in that: The telescopic assembly includes a telescopic rod body and a limiting member; The two ends of the telescopic rod along its telescopic direction are respectively connected to the two non-invasive bone marrow cavity clamps; The limiting member is connected to the telescopic rod body and is used to limit the extension and retraction of the telescopic rod body.

4. The non-invasive intramedullary clamp-type biaxial traction reduction external fixator according to claim 3, characterized in that: The telescopic rod body comprises a sleeve and a movable rod; The movable rod is coaxial with the sleeve and is slidably connected; along the axis direction of the movable rod, two ends of the movable rod and the sleeve that are away from each other are respectively connected to two non-invasive bone marrow cavity clamps.

5. The non-invasive intramedullary clamp-type biaxial traction reduction external fixator according to claim 4, characterized in that: The telescopic rod body also includes a rotating gear; along the axis direction of the movable rod, the movable rod is provided with a rack; the rotating gear is rotatably connected to the sleeve and meshes with the rack; The limiting member is connected to the sleeve, and the limiting member is used to abut against the rotating gear or the rack to limit the sliding of the movable rod relative to the sleeve; The outer circumferential surface of the sleeve is provided with a first opening and a second opening. The first opening is used for the limiter to abut against the rack in the sleeve; the second opening is used for the rotating gear to mesh with the rack in the sleeve.

6. The non-invasive intramedullary clamp-type biaxial traction reduction external fixator according to claim 5, characterized in that: The telescopic rod body also includes a mounting seat and an adjusting knob; The mounting seat is connected to the sleeve and is located at one end of the sleeve facing the movable rod, and the rotating gear is rotatably connected to the mounting seat; The adjusting knob is rotatably connected to the mounting seat and is transmission-connected to the rotating gear. The adjusting knob is used to drive the rotating gear to rotate relative to the mounting seat under the action of an external force.

7. The non-invasive intramedullary clamp-type biaxial traction reduction external fixator according to claim 6, characterized in that: The limiting member includes a limiting clamping strip, a limiting sleeve and a limiting elastic member; the limiting clamping strip and the limiting sleeve are both rotatably connected to the mounting seat; The limit clamping strip is used to abut against the rack; the limit sleeve is used to abut against the limit clamping strip, so as to limit the rotation of the limit clamping strip relative to the mounting seat when the limit clamping strip abuts against the rack; The limiting elastic member is connected to the rotation connection between the limiting clamping strip and the mounting seat; the limiting elastic member is used to make the limiting clamping strip have a tendency to be out of contact with the rack.

8. The non-invasive intramedullary clamp-type biaxial traction reduction external fixator according to any one of claims 2 to 7, characterized in that: The non-invasive intramedullary clamp-type biaxial traction reduction external fixator further comprises at least one stabilizing rod group; The stabilizing rod group includes a stabilizing rod and two fixing seats; the two fixing seats are respectively connected to the two non-invasive bone marrow cavity clamps, and the two ends of the stabilizing rod are respectively connected to the two fixing seats; The fixing seat comprises a main body, a locking sleeve and a supporting sleeve; The main body is connected to the first clamp arm or the second clamp arm, the main body is provided with a first through slot, and the stabilizing rod is accommodated in the first through slot; the abutting sleeve is sleeved on the main body, the locking sleeve is threadedly connected to the main body, and the locking sleeve is used to abut against the abutting sleeve, so that the abutting sleeve abuts against the stabilizing rod; The main body is provided with a second through slot, which cooperates with the first clamp arm or the second clamp arm; the main body is provided with a mounting hole, which is connected with the second through slot and passes through the main body; the fixing seat also includes a connecting bolt, which is threadedly connected with the mounting hole to limit the movement of the main body relative to the first clamp arm or the second clamp arm.

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