Limb fixing frame for wrist-elbow arthroscopic surgery

Abstract

The invention relates to the technical field of medical instruments, in particular to a limb fixing frame for wrist-elbow arthroscopic surgery, which comprises a body and an extension part detachably connected with the body, the body comprises an arc-shaped supporting plate, a first connecting piece and a supporting rod, the supporting rod comprises a rod body and a Y-shaped bracket positioned at the top end of the rod body, and the Y-shaped bracket is hinged with the rod body; the first connecting piece is fixed between the bottom face of the arc-shaped supporting plate and the upper end face of the Y-shaped bracket, and the rod body is detachably combined with an operating bed. The device is simple and stable in structure, can be suitable for elbow joint surgery and wrist joint surgery, can flexibly adjust the inclination angle of the arc-shaped supporting plate for placing the arm, reserves a larger operation space for an arthroscope, and is suitable for a doctor in the internals to complete limb placement through operation by one person.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a limb fixation frame for wrist and elbow arthroscopic surgery. Background Art

[0002] Cartilage injury of the wrist or elbow joint refers to damage to the cartilage tissue in the wrist or elbow joint due to trauma, overuse or degenerative changes, resulting in joint pain, swelling and limited mobility, seriously affecting the patient's daily life and exercise ability, and requiring surgical treatment. Due to the complex structure of the soft tissue around the elbow joint, rich blood vessels and nerves, small extra-articular space, and difficult operation, it is necessary to arrange the arms of patients under general anesthesia in a side-lying or prone position and fix them to the side of the operating table to clearly expose their elbows or elbow joints. In order to achieve the purpose of a doctor completing the operation independently and ensuring precise surgery, the invention of application number 202323011706.1 in the prior art discloses a convenient wrist and elbow joint surgical support, which facilitates the operation by setting a first working part that can be lifted up and down arbitrarily, and facilitates traction and fixation of the arm. However, the defect of this structure is that it cannot be applied to fix the elbow joint in a supine or side-lying position. Summary of the Invention

[0003] In order to solve the above technical problems, the present application proposes a limb fixation frame for wrist and elbow arthroscopic surgery, comprising a main body and an extension part detachably connected thereto, the main body comprising an arc-shaped support plate, a first connecting member and a support rod, the support rod comprising a rod body and a Y-shaped bracket located at the top end of the rod body, the Y-shaped bracket being hinged to the rod body; the first connecting member is fixed between the bottom surface of the arc-shaped support plate and the upper end surface of the Y-shaped bracket, and the rod body is detachably combined with the operating bed.

[0004] As an improvement, the extended length of the arc-shaped support plate is 6-10 cm, and the edges at both ends are arcs, the arc length is 15-17 cm, and the curvature radius is 20-50 cm; preferably, the extended length of the arc-shaped support plate is 6-9 cm, and the arc length is 16 cm.

[0005] As an improvement, the extension portion includes an extension support plate, the shape of the extension support plate is the same as that of the arc-shaped support plate, and the extension portion also includes a second connecting member fixed to the bottom end surface of the extension support plate.

[0006] As an improvement, the first connecting member is a plurality of hollow tubes parallel to each other, the extension direction of the hollow tubes is the same as the extension direction of the arc-shaped support plate, and the second connecting member is a columnar rod, and the second connecting member is detachably connected to the first connecting member.

[0007] As an improvement, the first connecting member is three hollow tubes, the first and second hollow tubes are respectively fixed to the ends of the two arms of the Y-shaped bracket, and the third hollow tube is fixed in the groove between the two arms of the Y-shaped bracket.

[0008] As an improvement, the upper end surfaces of the arc-shaped support plate and the extended support plate are provided with self-adhesive straps.

[0009] As an improvement, the Y-shaped bracket is hinged to the rod body through a hinge joint; the hinge joint includes a cross-axis universal joint, and the cross-axis universal joint includes a pair of staggered pivoted axle forks and a cross axis passing between the axle forks, wherein the first axle fork is rigidly fixed to the end of the Y-shaped bracket away from its two arms, and the second axle fork is rigidly fixed to the top end of the rod body.

[0010] As an improvement, the articulated joint also includes an axis locking mechanism, which includes a locking tongue in the end face where each axis fork is pivotally connected to the cross shaft, and a ratchet mounted on each axis of the cross shaft. After the locking tongue is extended, it can engage with the ratchet respectively to lock the relative position between the axis fork on the same side as the locking tongue and the cross shaft.

[0011] As an improvement, the locking tongue in the end face of each shaft fork is composed of a ratchet, a bolt body with a flat key, and a threaded rod from the end close to the cross shaft to the end farthest from the cross shaft.

[0012] As an improvement, a blind hole is provided at the end of each shaft fork, and the open end of the blind hole is provided with a keyway adapted to the flat key of the bolt body. A sleeve is provided in the blind end of the blind hole, and the sleeve is sleeved on the threaded rod of the lock tongue. The shaft fork provides a long through hole along the extension direction of the blind hole, and the sleeve is exposed from the long through hole.

[0013] The structure of the present invention is simple and stable, and is suitable for both elbow and wrist joint surgery. It can flexibly adjust the inclination angle of the arc-shaped support plate for placing the arm, leaving a larger operating space for the arthroscopy, and is suitable for interns to complete the placement of limbs by one person. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 : Schematic diagram of two standard positions for elbow arthroscopic surgery;

[0015] Figure 2 : A schematic structural diagram of an embodiment;

[0016] Figure 3 : A schematic structural diagram of an embodiment;

[0017] Figure 4 : A schematic diagram of the partial structure of an embodiment;

[0018] Figure 5 : A schematic diagram of the partial structure of an embodiment;

[0019] Figure 6 : A structural diagram of an embodiment.

[0020] Figure numbers and their descriptions: 1 main body, 10 arc-shaped support plate, 11 first connecting member, 111 first hollow tube, 112 second hollow tube, 113 third hollow tube, 12 support rod, 121 rod body, 122 Y-shaped bracket, 123 hinged joint, 2 extension part, 21 extension support plate, 31 cross-axis universal joint, 31B1 first axis fork, 31B2 second axis fork, 31A cross axis, 32 locking tongue, 311 ratchet, 32a ratchet, 32b bolt body, 32c threaded rod, 32d sleeve. DETAILED DESCRIPTION

[0021] Arthroscopic surgery of the wrist or elbow requires the patient to be placed in the desired surgical position under general anesthesia, allowing for easy adjustment of the arthroscope and a clear view of the interior of the wrist or elbow. For example, in arthroscopic elbow release, the arthroscope is introduced proximally through the anteromedial proximal approach, or from the lateral humeroradial joint to release the anterior joint capsule. After the anterolateral release is complete, the arthroscope is switched to the lateral instrument, then moved to the anteromedial position to release the medial joint capsule.

[0022] The standard posture requirements for elbow arthroscopic surgery are as follows: Figure 1 As shown: The lateral decubitus position is the standard position, with the proximal upper arm elevated. Special emphasis is placed on maintaining the elbow in 90 degrees of flexion while ensuring free flexion and extension—this emphasizes that positioning should not be rigid and should allow for movement. The most critical detail is leaving 10-15 cm of operating space distal to the elbow, as this distance directly impacts the smooth operation of arthroscopic instruments.

[0023] The following examples further illustrate the present invention, but should not be construed as limiting the present invention. Without departing from the spirit and substance of the present invention, modifications or substitutions made to the methods, steps or conditions of the present invention are within the scope of protection of the present invention.

[0024] like Figure 2-6 The embodiments shown include Figure 2 The main body 1 and the extension part 2 detachably connected thereto, the main body 1 includes an arc-shaped support plate 10, a first connecting member 11 and a support rod 12, the support rod 12 includes a rod body 121 and a Y-shaped bracket 122 located at the top end of the rod body, the first connecting member 11 is fixed between the bottom surface of the arc-shaped support plate 10 and the upper end surface of the Y-shaped bracket 122, the rod body 121 is detachably combined with the operating bed (specific combining methods include snap-on, fastener combination, bolts, etc.), and the operating bed body is not shown in the drawings.

[0025] Some of the above embodiments include Figure 3 The extension part 2 shown includes an extension support plate 21, the extension length of the arc support plate is 6-10 cm, the edges at both ends are arcs, the arc length is 15-17 cm, and the curvature radius is 20-50 cm; preferably, the extension length of the arc support plate is 6-9 cm, and the arc length is 16 cm.

[0026] like Figure 2-3 The first connecting member is a plurality of hollow tubes parallel to each other, the extension direction of the hollow tubes is the same as the extension direction of the arc-shaped supporting plate, and the second connecting member is a columnar rod, and the second connecting member is detachably combined with the first connecting member.

[0027] As a specific connection method, the columnar rod can be passed through the hollow tube to fix the extension part on the arc-shaped supporting plate.

[0028] On the basis of the above embodiment, the length of the arc-shaped support plate in this embodiment is 9 cm, and the length of the arc line is 16 cm.

[0029] like Figure 2-3 In the embodiment, the first connecting member 11 is three hollow tubes, the first and second hollow tubes 111 and 112 are respectively fixed to the ends of the two arms of the Y-shaped bracket, and the third hollow tube 113 is fixed in the groove between the two arms of the Y-shaped bracket.

[0030] In some other embodiments, the upper end surfaces of the arc-shaped support plate and the extended support plate are provided with self-adhesive tapes (not shown in the drawings).

[0031] It should be noted that when performing wrist or elbow arthroscopy, the patient, under general anesthesia, lies supine or on their side. The support rods of the limb fixation frame for wrist and elbow arthroscopy in Examples 1-3 are fixed to the side of the operating table. The patient's arm is placed on the curved support plate or on the long support plate formed by assembling the curved support plate and the extended support plate, fully exposing the surgical site. The shape of the curved support plate can support and fix the arm while effectively reducing obstruction and facilitating the insertion of the arthroscope.

[0032] Example 3

[0033] On the basis of embodiment 1-2, the Y-shaped bracket 122 of this embodiment is hinged to the rod body 121 (eg Figure 4-6 ).

[0034] The Y-shaped bracket and the rod body are connected by Figure 3-5The articulated joint 123 is hinged; the articulated joint 123 includes a cross-axis universal joint 31, and the cross-axis universal joint 31 includes a pair of staggered pivoted shaft forks 31B1, 31B2 and a cross shaft 31A passing through the shaft forks, wherein the first shaft fork 31B1 is rigidly fixed to the end of the Y-shaped bracket 122 away from its two arms, and the second shaft fork 31B2 is rigidly fixed to the top of the rod body 121.

[0035] like Figure 5 The articulated joint 123 also includes an axis locking mechanism, which includes a locking tongue 32 in the end surface where each axis fork is pivotally connected to the cross shaft, and a ratchet 311 sleeved on each axis of the cross shaft. After the locking tongue 32 is extended, it can engage with the ratchet respectively to lock the relative position between the axis fork on the same side as the locking tongue 32 and the cross shaft.

[0036] like Figure 5 The locking tongue in the end face of each shaft fork is composed of a ratchet 32a, a bolt body 32b with a flat key, and a threaded rod 32c from the end close to the cross shaft to the end farthest from the cross shaft.

[0037] Figure 4 A blind hole is provided at the end of the shaft fork, and a keyway is provided at the open end of the blind hole for matching with the flat key of the bolt body. A sleeve 32d is provided in the blind end of the blind hole, and the sleeve 32d is sleeved on the threaded rod of the lock tongue. The shaft fork has a long through hole along the extension direction of the blind hole, and the sleeve 32d is exposed from the long through hole.

[0038] When the locking tongue provided in the shaft fork on one side is in a retracted state, its ratchet and the ratchet sleeved on one shaft of the cross shaft projected on the shaft fork do not contact each other. At this time, the cross shaft of the articulated joint and the shaft fork on this side can freely move relative to each other. At this time, the tilt angle of the arc support plate (and the extension support plate connected thereto) in the rotation direction of the shaft fork can be adjusted. The principle and effect achieved by the shaft fork on the other side are the same as those on this side. When the ratchet of the first shaft fork is tightly engaged with the ratchet of the cross shaft, the rotation angle of the second shaft fork is locked. When the ratchet of the second shaft fork is tightly engaged with the ratchet of the cross shaft, the rotation angle of the first shaft fork is also locked. In this way, the angle of tilt required for the arc support plate (and the extension support plate connected thereto) in two orthogonal dimensions according to the body position can be met.

[0039] Based on the above embodiments, in some embodiments, the upper end surfaces of the arc-shaped support plate and the extended support plate are provided with self-adhesive straps (not shown in the drawings) for binding and fixing the patient's arms to the arc-shaped support plate and the extended support plate.

[0040] It should be understood that the terms "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, which indicate orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0041] Although the present invention has been described in detail above using general explanations, specific embodiments, and experiments, it will be apparent to those skilled in the art that modifications and improvements may be made based on the present invention. Therefore, such modifications and improvements, which do not depart from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A limb fixation frame for wrist and elbow arthroscopic surgery, characterized in that: It includes a main body and an extension part detachably connected thereto, the main body includes an arc-shaped support plate, a first connecting member and a support rod, the support rod includes a rod body and a Y-shaped bracket located at the top end of the rod body, and the Y-shaped bracket is hinged to the rod body; the first connecting member is fixed between the bottom surface of the arc-shaped support plate and the upper end surface of the Y-shaped bracket, and the rod body is detachably combined with the operating table.

2. The limb fixation frame for wrist and elbow arthroscopic surgery according to claim 1, characterized in that: The extended length of the arc-shaped support plate is 6-10 cm, and the edges at both ends are arcs. The arc length is 15-17 cm and the curvature radius is 20-50 cm; preferably, the extended length of the arc-shaped support plate is 6-9 cm, and the arc length is 16 cm.

3. The limb fixation frame for wrist and elbow arthroscopic surgery according to claim 2, characterized in that: The extension portion includes an extension support plate, the shape of the extension support plate is the same as that of the arc-shaped support plate, and the extension portion also includes a second connecting member fixed to the bottom end surface of the extension support plate.

4. The limb fixation frame for wrist and elbow arthroscopic surgery according to claim 3, characterized in that: The first connecting member is a plurality of hollow tubes parallel to each other, and the extending direction of the hollow tubes is the same as the extending direction of the arc-shaped supporting plate. The second connecting member is a columnar rod, and the second connecting member is detachably connected to the first connecting member.

5. The limb fixation frame for wrist and elbow arthroscopic surgery according to claim 4, characterized in that: The first connecting member is three hollow tubes, the first and second hollow tubes are respectively fixed at the ends of the two arms of the Y-shaped bracket, and the third hollow tube is fixed in the groove between the two arms of the Y-shaped bracket.

6. The limb fixation frame for wrist and elbow arthroscopic surgery according to claim 5, characterized in that: The upper end surfaces of the arc-shaped supporting plate and the extended supporting plate are provided with self-adhesive binding tapes.

7. The limb fixation frame for wrist and elbow arthroscopic surgery according to claim 1, characterized in that: The Y-shaped bracket is hinged to the rod body through a hinge joint; the hinge joint includes a cross-axis universal joint, and the cross-axis universal joint includes a pair of staggered pivoted shaft forks and a cross shaft passing between the shaft forks, wherein the first shaft fork is rigidly fixed to the end of the Y-shaped bracket away from its two arms, and the second shaft fork is rigidly fixed to the top end of the rod body.

8. The limb fixation frame for wrist and elbow arthroscopic surgery according to claim 7, characterized in that: The articulated joint also includes an axis locking mechanism, which includes a locking tongue in the end surface where each axis fork is pivotally connected to the cross shaft, and a ratchet sleeved on each axis of the cross shaft. After the locking tongue is extended, it can engage with the ratchet respectively to lock the relative position between the axis fork on the same side as the locking tongue and the cross shaft.

9. The limb fixation frame for elbow arthroscopic surgery according to claim 8, characterized in that: The locking tongue in the end surface of each shaft fork is composed of a ratchet, a bolt body with a flat key, and a threaded rod in sequence from one end close to the cross shaft to the end far away from the cross shaft.

10. The limb fixation frame for wrist and elbow arthroscopic surgery according to claim 9, characterized in that: A blind hole is formed at the end of each shaft fork, and a keyway is provided at the open end of the blind hole to match the flat key of the bolt body. A sleeve is provided in the blind end of the blind hole, and the sleeve is sleeved on the threaded rod of the lock tongue. The shaft fork forms a long through hole along the extension direction of the blind hole, and the sleeve is exposed from the long through hole.

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