Intramedullary nail removal device

Abstract

The present invention provides an intramedullary nail removal device, which relates to the technical field of medical devices. The intramedullary nail removal device includes a support frame, a connecting member, a fixing member, and a power member for driving the fixing member. The power member is detachably mounted on the support frame and connected to the fixing member via the connecting member, so that the power member drives the fixing member to remove the intramedullary nail. This facilitates the removal of the intramedullary nail.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an intramedullary nail removal device. Background Art

[0002] With the continuous development of intramedullary nailing technology, this technology has been widely used in the medical field. Intramedullary fixation refers to the method of inserting a human-compatible and strong implant into the medullary cavity at the distal or proximal end of a bone to achieve fixation of the fracture end or osteotomy end.

[0003] Intramedullary fixation has been used for many years to treat fractures and deformity correction. It can be applied not only to transverse or mildly oblique fractures but also to correct limb deformities. Through three-point fixation, it provides strong internal fixation of the fracture or osteotomy ends and allows patients to engage in early functional training. Therefore, this technique is widely used clinically.

[0004] Intramedullary nails are commonly used in pediatric orthopedics for internal fixation, including fracture and deformity correction. Depending on the patient's needs, the nail can be removed after complete healing of the fracture or osteotomy ends. Commonly used devices for removing the nail include intramedullary nail forceps and T-handles. However, in actual clinical practice, nail removal is often difficult or even impossible.

[0005] Therefore, providing an intramedullary nail removal device that is easy to remove has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0006] The object of the present invention is to provide an intramedullary nail removal device to alleviate the technical problem of difficulty in removing the intramedullary nail in the prior art.

[0007] In a first aspect, an embodiment of the present invention provides an intramedullary nail removal device, comprising a support frame, a connecting member, a fixing member for fixing the tail of the intramedullary nail, and a power member;

[0008] The power member is detachably arranged on the support frame;

[0009] The power member is connected to the fixing member through a connecting member, so that the power member drives the fixing member to pull out the intramedullary nail.

[0010] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the fixing member includes a pressure block, a pressure nut, a pressure threaded rod, and a fixing ring for being sleeved on the tail of the intramedullary nail;

[0011] The fixing ring is fixedly arranged at the end of the pressurizing threaded rod, the pressurizing block is sleeved on the pressurizing threaded rod, the pressurizing nut is threadedly connected to the pressurizing threaded rod, and the pressurizing nut abuts against the pressurizing block;

[0012] One end of the pressurized threaded rod away from the fixing belt ring is connected to the connecting piece.

[0013] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein an outer wall of the pressure block is provided with a groove adapted to the outer wall of the intramedullary nail.

[0014] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the number of the fixing members is two.

[0015] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the connecting member is a connecting rod.

[0016] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the power member is a power threaded rod.

[0017] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein an annular groove is provided at one end of the power member, and an openable and closable clamping ring adapted to the annular groove is provided on the connecting member.

[0018] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a crank is detachably provided at one end of the power member away from the connecting rod.

[0019] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the support frame includes a bracket and an adjustment frame;

[0020] The bracket is U-shaped, and the number of the adjustment brackets is two;

[0021] The bracket is rotatably connected to the adjustment frame, and a locking piece is provided at the connection between the bracket and the adjustment frame.

[0022] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein an arc-shaped pad adapted to the outer wall of the patient's long bone is provided at one end of the adjustment frame away from the bracket.

[0023] Beneficial effects:

[0024] An embodiment of the present invention provides an intramedullary nail removal device, comprising a support frame, a connecting piece, a fixing piece for fixing the tail of the intramedullary nail, and a power piece; the power piece is detachably arranged on the support frame; the power piece is connected to the fixing piece through the connecting piece, so that the power piece drives the fixing piece to pull out the intramedullary nail.

[0025] During actual use, the medical staff will fix the fixing part on the tail of the intramedullary nail exposed outside the patient's long bone, and then connect the power part and the fixing part together through a connecting part. During the connection process, the support frame will be set outside the patient's long bone, and the power part will be supported by the support frame, so that the medical staff can drive the power part, thereby driving the fixing part to extract the intramedullary nail in the patient's long bone. Through this setting, the medical staff can easily remove the intramedullary nail. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of a portion of the structure of an intramedullary nail removal device provided in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the intramedullary nail removal device provided by an embodiment of the present invention when in use.

[0029] icon:

[0030] 100 - support frame; 110 - bracket; 120 - adjustment frame; 130 - locking piece;

[0031] 200-connector;

[0032] 300-fixing piece; 310-pressure block; 320-pressure nut; 330-pressure threaded rod; 340-fixing ring;

[0033] 400-power parts;

[0034] 500-intramedullary nail;

[0035] 600-crank handle;

[0036] 700 - long bones. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0040] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0042] See also Figure 1 and Figure 2 As shown, an embodiment of the present invention provides an intramedullary nail removal device, including a support frame 100, a connecting member 200, a fixing member 300 for fixing the tail of the intramedullary nail 500, and a power member 400 for the user to drive the fixing member 300 to move; the power member 400 is detachably arranged on the support frame 100; the power member 400 is connected to the fixing member 300 through the connecting member 200, so that the power member 400 drives the fixing member 300 to pull out the intramedullary nail 500.

[0043] During specific use, the medical staff will fix the fixing part 300 on the tail of the intramedullary nail 500 exposed outside the patient's long bone 700, and then connect the power part 400 and the fixing part 300 together through the connecting part 200. During the connection process, the support frame 100 will be set outside the patient's long bone 700, and the power part 400 will be supported by the support frame 100, so that the medical staff can drive the power part 400, thereby driving the fixing part 300 to pull out the intramedullary nail 500 in the patient's long bone 700. Through such a setting, the medical staff can easily remove the intramedullary nail 500.

[0044] Specifically, during the operation, the medical staff fixes the fixing part 300 on the outer wall of the intramedullary nail 500 exposed outside the long bone 700 on the patient's long bone 700, so that when the medical staff controls the power part 400 to move, the power part 400 can drive the fixing part 300 away from the patient's long bone 700 through the connecting part 200.

[0045] See also Figure 1 and Figure 2 As shown, in an optional scheme of this embodiment, the fixing member 300 includes a pressure block 310, a pressure nut 320, a pressure threaded rod 330 and a fixing ring 340 for being sleeved on the tail of the intramedullary nail 500; the fixing ring 340 is fixedly set at the end of the pressure threaded rod 330, the pressure block 310 is sleeved on the pressure threaded rod 330, the pressure nut 320 is threadedly connected to the pressure threaded rod 330, and the pressure nut 320 is abutted against the pressure block 310; the end of the pressure threaded rod 330 away from the fixing ring 340 is connected to the connecting member 200.

[0046] Specifically, the fixing member 300 includes a pressure block 310, a pressure threaded rod 330 and a fixing ring 340. When in use, the medical staff puts the fixing ring 340 on the intramedullary nail 500, and then the medical staff rotates the pressure nut 320 put on the pressure threaded rod 330, so that the pressure nut 320 can press the pressure block 310 toward the intramedullary nail 500, so that the pressure threaded rod 330 is away from the intramedullary nail 500, thereby tightening the fixing ring 340 through the pressure block 310, so that the fixing ring 340 can tightly fix the intramedullary nail 500.

[0047] Among them, the end of the pressurized threaded rod 330 away from the fixing ring 340 is connected to the connecting piece 200, so that medical personnel can use the power piece 400 to drive the pressurized threaded rod 330 away from the long bone 700, and then remove the intramedullary nail 500 in the patient's long bone 700.

[0048] It should be noted that the pressure nut 320 is threadedly connected to the pressure threaded rod 330, so that medical personnel can rotate the pressure nut 320 to move the pressure block 310 toward the intramedullary nail 500, thereby tightening the fixing ring 340 so that the fixing ring 340 can tightly fix the intramedullary nail 500.

[0049] See also Figure 1 and Figure 2 As shown, in an optional solution of this embodiment, the outer wall of the pressure block 310 is provided with a groove adapted to the outer wall of the intramedullary nail 500 .

[0050] Specifically, a groove is provided on the outer wall of the pressure block 310. When the pressure block 310 is sleeved on the pressure threaded rod 330, the groove on the pressure block 310 abuts against the intramedullary nail 500, so that when the pressure nut 320 drives the pressure block 310, the pressure block 310 will not rotate at will.

[0051] See also Figure 1 and Figure 2 As shown, in an optional solution of this embodiment, the number of the fixing members 300 is two.

[0052] Specifically, two fixing members 300 are provided to increase the contact area between the intramedullary nail removal device provided in this embodiment and the intramedullary nail 500 , so that medical personnel can better remove the intramedullary nail 500 .

[0053] See also Figure 1 and Figure 2 As shown, in an optional solution of this embodiment, the connecting member 200 is a connecting rod.

[0054] Specifically, the connecting member 200 is a connecting rod, which connects the power member 400 and the fixing member 300 together.

[0055] See also Figure 1 and Figure 2 As shown, in an optional solution of this embodiment, the power member 400 adopts a power threaded rod.

[0056] Specifically, the power member 400 adopts a power threaded rod, and the connecting member 200 is detachably connected to the power member 400. When in use, the power threaded rod is threaded on the support frame 100, so that the power threaded rod can rotate relative to the support frame 100. When the medical staff rotates the power threaded rod, the power threaded rod can move relative to the support frame 100, so that the power threaded rod can drive the fixing member 300 to pull out the intramedullary nail 500.

[0057] See also Figure 1 and Figure 2 As shown, in an optional solution of this embodiment, a ring groove is provided at one end of the power member 400, and an openable and closable clamping ring adapted to the ring groove is provided on the connecting member 200.

[0058] Specifically, an annular groove is provided at one end of the power member 400, and an openable and closable clamping ring is provided on the connecting member 200. When in use, the medical staff opens the clamping ring and connects it to the annular groove, and then fastens the clamping ring on the annular groove, so that the power member 400 can rotate relative to the connecting member 200, and when the power member 400 is away from the intramedullary nail 500, the power member 400 can drive the fixing member 300 through the connecting member 200 to pull the intramedullary nail 500 out of the patient's long bone 700.

[0059] It should be pointed out that medical personnel can adjust the locking degree of the clasp; when there is a gap between the clasp and the annular groove after the clasp is closed, the annular groove on the power member 400 can rotate relative to the clasp on the connecting member 200; when the clasp is closed and tightly abuts against the annular groove, the annular groove on the power member 400 can drive the clasp on the connecting member 200 to rotate synchronously with the annular groove, so as to meet the needs of medical personnel to rotate the intramedullary nail.

[0060] In an optional solution of this embodiment, a crank 600 is detachably provided at one end of the power member 400 away from the connecting rod.

[0061] Specifically, a crank 600 is provided at one end of the power member 400 away from the connecting rod, and medical personnel can conveniently rotate the power member 400 through the crank 600.

[0062] It should be noted that medical personnel of different body shapes can choose crank handles 600 of different sizes, thereby facilitating operation by the medical personnel.

[0063] See also Figure 1 and Figure 2 As shown, in an optional solution of this embodiment, the support frame 100 includes a bracket 110 and an adjustment frame 120; the bracket 110 is U-shaped, and the number of the adjustment frames 120 is two; the bracket 110 and the adjustment frame 120 are rotatably connected, and a locking member 130 is provided at the connection between the bracket 110 and the adjustment frame 120.

[0064] Specifically, the support frame 100 includes a bracket 110 and two adjustment frames 120. The two adjustment frames 120 are respectively connected to one end of the bracket 110 through a locking member 130, and a threaded hole is opened at the other end of the bracket 110. The power member 400 can be set in the threaded hole.

[0065] Among them, the two adjustment frames 120 are respectively connected to one end of the bracket 110 through the locking piece 130, so that the angles of the adjustment bracket 110 and the adjustment frame 120 are adjusted so that both adjustment frames 120 abut against the patient's long bones 700 to ensure the stability of the support frame 100.

[0066] It should be noted that the locking member 130 enables the adjustment frame 120 and the bracket 110 to rotate relative to each other, and the locking member 130 can lock and fix the adjustment frame 120 and the bracket 110 so that the adjustment frame 120 and the bracket 110 cannot rotate relative to each other.

[0067] See also Figure 1 and Figure 2 As shown, in an optional solution of this embodiment, an arc-shaped pad adapted to the outer wall of the patient's long bone 700 is provided at one end of the adjustment frame 120 away from the bracket 110.

[0068] Specifically, an arc-shaped pad is provided at one end of the adjustment frame 120 , and the arc-shaped pad protects the patient's long bones 700 to prevent the adjustment frame 120 from causing harm to the patient.

[0069] It should also be noted that the arc-shaped groove of the pressure block 310 contacts the tail of the intramedullary nail 500, and pressure is applied by the pressure nut 320. Since the change of the thread is continuous, the contact surface between the pressure block 310 and the intramedullary nail 500 can be maximized and a larger pressure can be generated, thereby effectively preventing the pressure block 310 and the fixing ring 340 from slipping relative to the intramedullary nail 500.

[0070] In addition, by using the long bone 700 as a fulcrum, the crank 600 has a longer lever arm relative to the tail end of the intramedullary nail 500, and the same force can generate a greater torque. Medical personnel can choose a crank 600 with a suitable lever arm according to their own needs. Therefore, for medical personnel, a smaller force can be used to achieve the torque required to remove the intramedullary nail 500.

[0071] Furthermore, the contact surface between the adjustment frame 120 and the long bone 700 is curved, and by adjusting the angle of the adjustment frame 120, the contact surface is increased, thereby preventing damage to the long bone 700 and periosteum caused by the pressure generated by the reaction force of extracting the intramedullary nail 500. During the operation, to prevent lateral or oblique displacement of the long bone 700, an assistant can control the displacement of the long bone 700 from the opposite side of the long bone 700.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intramedullary nail removal device, characterized in that: include: A support frame (100), a connecting member (200), a fixing member (300) for fixing the tail of the intramedullary nail (500), and a power member (400); The power member (400) is detachably arranged on the support frame (100); The power member (400) is connected to the fixing member (300) via a connecting member (200), so that the power member (400) drives the fixing member (300) to pull out the intramedullary nail (500); The fixing member (300) comprises a pressure block (310), a pressure nut (320), a pressure threaded rod (330) and a fixing ring (340) for being sleeved on the tail of the intramedullary nail (500); the fixing ring (340) is fixedly arranged at the end of the pressure threaded rod (330), the pressure block (310) is sleeved on the pressure threaded rod (330), the pressure nut (320) is threadedly connected to the pressure threaded rod (330), and the pressure nut (320) is in contact with the pressure block (310); the end of the pressure threaded rod (330) away from the fixing ring (340) is connected to the connecting member (200); The connecting member (200) is a connecting rod, and the power member (400) is a power threaded rod; One end of the power member (400) is provided with an annular groove, and the connecting member (200) is provided with an openable and closable snap ring adapted to the annular groove; The power member (400) is detachably provided with a crank (600) at one end away from the connecting rod.

2. The intramedullary nail removal device according to claim 1, characterized in that: The outer wall of the pressure block (310) is provided with a groove adapted to the outer wall of the intramedullary nail (500).

3. The intramedullary nail removal device according to claim 1, characterized in that: The number of the fixing members (300) is two.

4. The intramedullary nail removal device according to any one of claims 1 to 3, characterized in that: The support frame (100) comprises a bracket (110) and an adjustment frame (120); The bracket (110) is U-shaped, and the number of the adjustment brackets (120) is two; The bracket (110) and the adjustment frame (120) are rotatably connected, and a locking member (130) is provided at the connection between the bracket (110) and the adjustment frame (120).

5. The intramedullary nail removal device according to claim 4, characterized in that: An end of the adjustment frame (120) away from the support (110) is provided with an arc-shaped pad adapted to the outer wall of the patient's long bone (700).

Images