Microvascular anastomosis area suspension anti-pulling fixing device

Abstract

The present application relates to the technical fields of microsurgery and operating room nursing auxiliary instrument, and discloses a kind of microvessel anastomosis area suspension anti-pulling fixing device.The device includes bed side fixed base, vertical support rod, horizontal telescopic connecting arm, adapter seat, main support beam, proximal U-shaped fixed support and distal U-shaped fixed support;Two U-shaped fixed supports are spaced apart along the main support beam and are respectively provided with a fixed band, and a suspension space that does not contact the microvessel anastomosis area of the affected limb is formed therebetween.The distal U-shaped fixed support can be adjusted along the main support beam and is locked by an axial locking screw provided at the distal end of the main support beam.The bed side fixed base is installed in a clamping manner, and the vertical support rod and the horizontal telescopic connecting arm are used to adjust the height and horizontal position of the support.The device can segmentally support the affected limb on both sides of the anastomosis area and limit the axial sliding of the distal support part, reduce the pressure on the anastomosis area and accidental pulling, and facilitate microvessel anastomosis, blood flow observation and intraoperative nursing operation.

Description

Technical Field

[0001] This invention relates to the field of microsurgery and operating room nursing aids, and in particular to a fixation device that provides segmental support and fixation of the proximal and distal limbs in the microvascular anastomosis process, such as limb preservation after severe limb trauma, limb replantation, vascular repair, or flap repair, and keeps the microvascular anastomosis area suspended and reduces axial traction. Background Technology

[0002] Limb-sparing surgery for severe limb trauma often involves multiple consecutive procedures, including debridement, fracture fixation, vascular anastomosis, nerve repair, and soft tissue coverage. After microvascular anastomosis, the affected limb usually needs to be kept in a stable position to allow for flap repair, wound management, bandaging and fixation, and monitoring of blood supply. If the affected limb experiences axial slippage, rotation, or a change in its point of support during this stage, traction may be transmitted to the newly completed vascular anastomosis area, affecting subsequent microsurgical procedures and monitoring of blood supply.

[0003] In clinical practice, soft pads, ordinary limb supports, or manual lifting are commonly used to support the affected limb. While continuous supports can support the affected limb, they tend to occupy space below the anastomosis area, bringing the open wound, microvascular anastomosis site, or flap pedicle close to the support surface, which is not conducive to maintaining a non-contact state in the anastomosis area. Single-point lifting or temporary soft pads are also difficult to stabilize the affected limbs on both sides of the anastomosis area at the same time, and anteroposterior slippage or torsion may still occur during position adjustments.

[0004] Furthermore, patients with severe limb trauma vary greatly in terms of injury location, limb length, and surgical position. Therefore, fixation devices need to be capable of bedside installation, height adjustment, lateral position adjustment, and proximal-distal support spacing adjustment. Existing conventional limb stents primarily provide overall support or universal positioning, lacking dual-point segmented support around the microvascular anastomosis area, central suspension, and axial locking anti-traction structures. Therefore, a mechanical fixation device with a clear structure, easy installation, adaptability to different limb lengths, and reduced pressure and accidental traction on the anastomosis area is needed. Summary of the Invention

[0005] (a) Technical problems to be solved To address the problems encountered during microvascular anastomosis, such as reliance on soft pads or manual support for limb support, difficulty in maintaining a contact-free space below the anastomosis area, easy changes in the relative position of the proximal and distal ends of the limb, and potential traction on the anastomosis area due to axial slippage, this invention provides a suspended anti-traction fixation device for the microvascular anastomosis area, primarily solving the following technical problems: 1) The device is provided with a stable installation base through bed-side clamping and vertical support structure, and the support height can be adjusted according to the position of the operating table and the affected limb; 2) The proximal U-shaped fixation bracket and the distal U-shaped fixation bracket support the affected limbs on both sides of the anastomosis area respectively, so that a suspended area without a continuous support surface is formed between the two fixation brackets, avoiding direct contact between the microvascular anastomosis area and the supporting structure. 3) The proximal and distal ends of the affected limb are segmentally fixed using a U-shaped support surface and fixation straps to limit significant lateral displacement, rotation, and unplanned movement; 4) By adjusting the axial direction of the distal U-shaped fixation bracket and locking the axial locking screw, it can adapt to different limb lengths and limit the unplanned slippage of the distal support part along the long axis of the limb after fixation, thereby reducing the transmission of traction force to the anastomosis area.

[0006] (II) Technical Solution The present invention adopts the following technical solution: a microvascular anastomosis area suspension anti-traction fixation device, including a bed-side fixation base (1), a vertical support rod (2), a height locking knob (3), a fixing screw (4), a transverse connecting outer arm (5), a transverse telescopic inner arm (6), a main support beam (7), a proximal U-shaped fixation bracket (8), a proximal fixation strap (9), a distal U-shaped fixation bracket (10), a distal fixation strap (11), an axial locking screw (12), and an adapter seat (13).

[0007] The bedside fixing base (1) adopts an open clamping structure for clamping onto the side rail, edge, or other support components with stable edges of the operating table. The fixing screw (4) is threaded through or connected to the lower part of the bedside fixing base (1). After tightening the fixing screw (4), its clamping end engages with the side edge of the operating table to fix the bedside fixing base (1) in the selected position.

[0008] A vertical support rod (2) is located on the upper part of the bed-side fixed base (1). The vertical support rod (2) can be adjusted up and down relative to the bed-side fixed base (1) or its support sleeve. The height locking knob (3) is used to limit the continued movement of the vertical support rod (2) after it is adjusted to a suitable height. The upper end of the vertical support rod (2) is connected to the transverse connecting outer arm (5). The transverse telescopic inner arm (6) slides with the transverse connecting outer arm (5), so that the device can change its extension position along the transverse side of the operating table.

[0009] The distal end of the lateral telescopic inner arm (6) is connected to the main support beam (7) via an adapter (13). The main support beam (7) is positioned along the long axis of the affected limb, serving as a common mounting base for the proximal U-shaped fixation bracket (8) and the distal U-shaped fixation bracket (10). The adapter (13) is used to maintain a stable connection between the lateral telescopic inner arm (6) and the main support beam (7), and to enable the main support beam (7) to be positioned at a predetermined support position under the affected limb.

[0010] The proximal U-shaped fixation bracket (8) and the distal U-shaped fixation bracket (10) are spaced apart along the length of the main support beam (7). The grooves of both U-shaped fixation brackets extend along the long axis of the affected limb, and the cross-section forms an upward-opening arc or U-shaped support surface, allowing the affected limb to be placed naturally along the length of the main support beam (7). The proximal fixation bandage (9) is placed above the opening of the proximal U-shaped fixation bracket (8), and the distal fixation bandage (11) is placed above the opening of the distal U-shaped fixation bracket (10), used to fix the affected limbs on both sides of the anastomosis area without covering the microvascular anastomosis area.

[0011] A preset distance is maintained between the proximal U-shaped fixation bracket (8) and the distal U-shaped fixation bracket (10), forming a suspended space for the microvascular anastomosis area between their opposing inner edges. No continuous support plate or transverse support surface is set below this suspended space, so that the area where the vascular anastomosis, wound or flap pedicle is located can remain in a non-contact state, and space is reserved for the surgeon to observe, micromanipulate and assess blood supply during the operation.

[0012] The lower part of the distal U-shaped fixing bracket (10) is provided with a sliding mounting part that cooperates with the main support beam (7), so that the distal U-shaped fixing bracket (10) can move along the length direction of the main support beam (7) to adjust the distance between it and the proximal U-shaped fixing bracket (8). The axial locking screw (12) is provided at the distal end of the main support beam (7) and arranged along the length direction of the main support beam (7). The axial locking screw (12) cooperates with the threaded connection part at the distal end of the main support beam (7), and its inner end can abut against the sliding mounting part of the distal U-shaped fixing bracket (10) or cooperate with its limiting part, thereby restricting the axial movement of the distal U-shaped fixing bracket (10) after adjustment.

[0013] A flexible buffer layer can be provided on the inner surface of the proximal U-shaped fixation bracket (8) and the distal U-shaped fixation bracket (10), and the fixation straps (9, 11) adopt a flexible and adjustable structure. Through the combination of the bedside fixation base (1), vertical support rod (2), lateral telescopic structure, double U-shaped fixation bracket and axial locking structure, the device can be installed and the affected limb can be fixed in segments according to different limb lengths, injury sites and operating table positions.

[0014] (III) Beneficial Effects Compared with ordinary soft pads, continuous support boards or manual lifting methods, the present invention directly installs the bed-side fixed base (1) on the side edge of the operating table, which can provide independent support for the affected limb without occupying the main operating table surface; the vertical support rod (2) and the horizontal telescopic structure can adjust the height and horizontal extension position of the device, so that the main support beam (7) can be matched with the actual surgical position.

[0015] The microvascular anastomosis area is supported in segments by the proximal U-shaped fixation bracket (8) and the distal U-shaped fixation bracket (10). An open suspended space is formed between the two fixation brackets, so that the anastomosis area, open wound or flap pedicle is not directly pressured, and at the same time, it is convenient for the surgeon to observe, operate and judge blood supply.

[0016] By combining the U-shaped fixation brace with the proximal fixation bandage (9) and the distal fixation bandage (11), a stable support and restraint can be formed on the proximal and distal ends of the affected limb, respectively, reducing the significant lateral displacement, rotation and unplanned movement of the affected limb during the body position adjustment process.

[0017] The axially adjustable structure of the distal U-shaped fixation bracket (10) and the axial locking screw (12) allow for adjustment of the distance between the two fixation brackets according to the patient's limb length. After the position is determined, the distal fixation bracket is mechanically limited, thereby reducing the risk of traction caused by the distal support sliding along the long axis of the affected limb. The entire device mainly employs a clamping, telescopic, supporting, strapping, and threaded locking structure. It requires no motor, sensor, or software control, making its structure relatively simple and easy to clean, disinfect, and reuse. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a microvascular anastomosis area suspension anti-traction fixation device according to the present invention; Figure 2 This is a side view of the anti-traction fixation device for the suspended microvascular anastomosis area according to the present invention. Figure 3 This is a top view schematic diagram of a microvascular anastomosis area suspension anti-traction fixation device according to the present invention; Figure 4 This is a schematic diagram of the lower limb in use of the microvascular anastomosis area suspension anti-traction fixation device of the present invention.

[0019] In the diagram: 1 - Bedside fixation base; 2 - Vertical support rod; 3 - Height locking knob; 4 - Fixing screw (clamping screw); 5 - Lateral connecting outer arm; 6 - Lateral telescopic inner arm; 7 - Main support beam; 8 - Proximal U-shaped fixation bracket; 9 - Proximal fixation strap; 10 - Distal U-shaped fixation bracket; 11 - Distal fixation strap; 12 - Axial locking screw; 13 - Adapter seat; 14 - Affected limb; 15 - Microvascular anastomosis area. Detailed Implementation

[0020] (I) Overall Structure and Connection Relationships like Figure 1 - Figure 3As shown, a microvascular anastomosis area suspension anti-traction fixation device in this embodiment includes a bedside fixation base (1), a vertical support rod (2), a height locking knob (3), a fixing screw (4), a transverse connecting outer arm (5), a transverse telescopic inner arm (6), a main support beam (7), a proximal U-shaped fixation bracket (8), a proximal fixation strap (9), a distal U-shaped fixation bracket (10), a distal fixation strap (11), an axial locking screw (12), and an adapter (13).

[0021] The bedside fixing base (1) is located at the bottom of the device. The vertical support rod (2) extends upward from the bedside fixing base (1). The transverse connecting outer arm (5) is located at the upper end of the vertical support rod (2). The transverse telescopic inner arm (6) extends from the transverse connecting outer arm (5) toward the inside of the operating table. The distal end of the transverse telescopic inner arm (6) is connected to the main support beam (7) through the adapter seat (13). The proximal U-shaped fixing bracket (8) and the distal U-shaped fixing bracket (10) are arranged at intervals along the main support beam (7).

[0022] (II) Bedside Fixation and Space Adjustment Structure The bedside fixing base (1) can adopt a C-shaped or U-shaped opening clamping structure, including an upper clamping part, a side connecting part, and a lower clamping part. In use, the operating table side rail or bed edge is placed between the upper clamping part and the lower clamping part, and the fixing screw (4) is rotated so that the clamping end of the fixing screw (4) moves toward the upper clamping part and clamps the operating table side edge to complete the bedside fixing. The outer end of the fixing screw (4) can be equipped with a hand-tightening head, which makes it easy for nursing staff to complete the installation and disassembly without special tools.

[0023] The vertical support rod (2) can be a round rod or a polygonal rod structure, with its lower part inserted into the support sleeve on the upper part of the bed-side fixed base (1). After loosening the height locking knob (3), the vertical support rod (2) can move up and down; after adjusting to the required height, tighten the height locking knob (3) so that its locking end presses against the vertical support rod (2) to maintain the set height.

[0024] The transverse connecting outer arm (5) and the transverse telescopic inner arm (6) form a telescopic structure with their lengths aligned transversely along the operating table. The transverse telescopic inner arm (6) can move back and forth relative to the transverse connecting outer arm (5), allowing the main support beam (7) to move closer to or further away from the patient. The telescopic position can be locked using a threaded knob, a clamping ring, or a buckle. The adapter (13) can be a block connector that stably connects the transverse telescopic inner arm (6) to the main support beam (7), allowing the main support beam (7) to unfold along the long axis of the affected limb.

[0025] (III) Proximal and distal U-shaped fixation supports and anastomotic area suspension structure Both the proximal U-shaped fixation brace (8) and the distal U-shaped fixation brace (10) are open-top groove-shaped support structures, with the length direction of the groove aligned with the long axis of the affected limb. The cross-section of the U-shaped support surface can be a continuous circular arc, an elliptical arc, or a shallow U-shaped curved surface with a gentler middle section. The two side edges are higher than the middle support surface, allowing the affected limb to be placed along the length direction of the groove and to obtain a certain positional boundary in the left and right directions.

[0026] The proximal U-shaped fixation support (8) is used to support the affected limb proximal to the microvascular anastomosis area, and the distal U-shaped fixation support (10) is used to support the affected limb distal to the microvascular anastomosis area. The proximal fixation bandage (9) and the distal fixation bandage (11) are respectively positioned above the opening of the corresponding U-shaped fixation support. The ends of the bandages are detachably connected to the sides of the U-shaped fixation support, and their length can be adjusted according to the circumference of the affected limb. The inner surface of the U-shaped fixation support may be lined with silicone, medical foam, or other flexible cushioning materials to reduce local pressure.

[0027] No continuous support plate is provided between the proximal U-shaped fixation bracket (8) and the distal U-shaped fixation bracket (10), and the gap between the two forms a suspended space in the microvascular anastomosis area. When in use, the anastomosis site, open wound or flap pedicle to be protected is placed in this gap, so that its lower part does not contact the device; at the same time, the affected limbs on both sides of the anastomosis area are stably supported by two U-shaped fixation brackets, forming a structural relationship of "support at both ends and suspended in the middle".

[0028] (iv) Distal axial adjustment and anti-pull structure The distal U-shaped fixation bracket (10) has a sliding mounting part at its lower part. A straight guide surface, guide rail, or guide groove is formed on the main support beam (7) to cooperate with the sliding mounting part, so that the distal U-shaped fixation bracket (10) can move along the length of the main support beam (7). The nursing staff can adjust the distance between the distal U-shaped fixation bracket (10) and the proximal U-shaped fixation bracket (8) according to the length of the affected limb and the position of the anastomosis area to be suspended.

[0029] An axial locking screw (12) is located at the distal end of the main support beam (7), with the screw axis being substantially parallel to the length direction of the main support beam (7). The axial locking screw (12) engages with the threaded connection at the distal end of the main support beam (7). When the axial locking screw (12) is rotated, its inner end can approach and abut against the sliding mounting part of the distal U-shaped fixing bracket (10), or engage with the limiting surface provided on the sliding mounting part. After adjustment, tightening the axial locking screw (12) can restrict the distal U-shaped fixing bracket (10) from continuing to move along the long axis of the affected limb.

[0030] The above structure allows the proximal U-shaped fixation bracket (8) and the distal U-shaped fixation bracket (10) to fix the affected limbs on both sides of the anastomosis area respectively, and maintains the relative position between the two fixation brackets through an axial locking structure. When minor position adjustments, instrument changes or bandaging operations occur during the operation, it can reduce unplanned slippage of the distal support position along the long axis of the affected limb, structurally reducing the possibility of traction force being directly transmitted to the middle suspended anastomosis area.

[0031] (V) Usage Process like Figure 4 As shown, taking limb-sparing surgery for severe lower limb trauma as an example, before use, clamp the bed-side fixing base (1) to the side edge of the operating table and tighten the fixing screw (4) to complete the installation. Loosen the height locking knob (3) according to the height of the affected limb and adjust the height of the vertical support rod (2); then adjust the extension length of the transverse connecting outer arm (5) and the transverse telescopic inner arm (6) so that the main support beam (7) is located below the affected limb and is basically consistent with the long axis direction of the affected limb.

[0032] Place the affected limb (14) proximal to the microvascular anastomosis area (15) into the proximal U-shaped fixation bracket (8), and place the affected limb distal to the anastomosis area into the distal U-shaped fixation bracket (10), so that the vascular anastomosis site is located in the suspended space between the two U-shaped fixation brackets. Move the distal U-shaped fixation bracket (10) along the main support beam (7) according to the length of the affected limb, and tighten the axial locking screw (12) after the position is appropriate. Then adjust the proximal fixation bandage (9) and the distal fixation bandage (11) to maintain the position of the affected limb without excessive compression.

[0033] During the procedure, the anastomosis area and surrounding tissues can be directly observed through the open space between the two U-shaped fixation supports. Microsurgical manipulation, blood supply assessment, or wound management can be performed as needed. When adjustments to the overall height or lateral position are required, the safety of the affected limb and the anastomosis area should be confirmed first, and then the corresponding locking structures should be released for adjustment. For upper limb microvascular anastomosis, limb replantation, or flap repair, the U-shaped fixation supports and the distance between the two fixation supports can be reduced according to the limb size, and the usage method is the same.

[0034] (vi) Examples of assembly and implementation methods In this embodiment, the rigid frame of the bedside fixing base (1), adapter (13), main support beam (7), and U-shaped fixing bracket can be made of aluminum alloy, stainless steel, engineering plastic, or other materials with sufficient rigidity and easy cleaning and disinfection. The vertical support rod (2), the transverse connecting outer arm (5), and the transverse telescopic inner arm (6) can be made of metal tubing or profiles, and a removable flexible buffer layer is provided on the inner surface of the U-shaped fixing bracket in contact with the patient.

[0035] The proximal fixation strap (9) and distal fixation strap (11) can be flexible straps with buckles, hook and loops, or snap fasteners. The sliding fit between the distal U-shaped fixation support (10) and the main support beam (7) can be a T-groove, dovetail groove, linear slide rail, or rectangular guide groove structure; the axial locking screw (12) can be a threaded rod with a hand-tightening head for quick adjustment during surgery. The specific dimensions of each component can be adjusted according to the upper limb, lower limb, and different operating table structures, but the core structural relationships of bed-side fixation, space adjustment, proximal and distal segmented support, intermediate suspension, and distal axial limiting and locking are maintained.

[0036] The above embodiments are used to illustrate the structural composition and working principle of the present invention. Without changing the above-described core structural relationships of the present invention, the local shape, material, connection method, guiding structure, and locking form of each component can be adjusted according to manufacturing conditions and clinical use requirements.

Claims

1. A microvascular anastomosis area suspension anti-traction fixation device, comprising a bed-side fixation base (1), characterized in that: A vertical support rod (2) is provided on the upper part of the bedside fixing base (1). The upper end of the vertical support rod (2) is connected to a transverse connecting outer arm (5). A transverse telescopic inner arm (6) is slidably provided inside the transverse connecting outer arm (5). The distal end of the transverse telescopic inner arm (6) is connected to the main support beam (7) through a transition seat (13). The main support beam (7) is set along the long axis of the affected limb. A proximal U-shaped fixation bracket (8) and a distal U-shaped fixation bracket (10) are set at intervals along the length of the main support beam (7). Both the proximal U-shaped fixation bracket (8) and the distal U-shaped fixation bracket (10) form an upwardly open groove-shaped support that extends along the long axis of the affected limb. On the proximal U-shaped fixation support (8), a proximal fixation strap (9) is provided, and a distal U-shaped fixation support (10) is provided with a distal fixation strap (11); a suspended space without a continuous support surface is formed between the proximal U-shaped fixation support (8) and the distal U-shaped fixation support (10); the lower part of the distal U-shaped fixation support (10) is slidably engaged with the main support beam (7), and an axial locking screw (12) is provided at the distal end of the main support beam (7) along its length direction. The axial locking screw (12) is used to restrict the distal U-shaped fixation support (10) from moving axially along the main support beam (7) after it is adjusted to the correct position.

2. The microvascular anastomosis area suspension anti-traction fixation device according to claim 1, characterized in that: The bedside fixing base (1) is an open C-shaped or U-shaped clamping structure, including an upper clamping part, a side connecting part and a lower clamping part. The fixing screw (4) is threadedly connected to the lower clamping part. The pressing end of the fixing screw (4) can move toward the upper clamping part to clamp and fix the bedside fixing base (1) to the side rail or edge of the operating table.

3. The microvascular anastomosis area suspension anti-traction fixation device according to claim 1, characterized in that: The vertical support rod (2) is slidably engaged with the support sleeve on the upper part of the bed side fixed base (1). The height locking knob (3) is threadedly connected to the support sleeve. The locking end of the height locking knob (3) can press against the vertical support rod (2) to restrict the vertical movement of the vertical support rod (2).

4. The microvascular anastomosis area suspension anti-traction fixation device according to claim 1, characterized in that: The transverse connecting outer arm (5) is a hollow tubular structure. The transverse telescopic inner arm (6) is inserted inside the transverse connecting outer arm (5) and can reciprocate along its length. A mechanical locking structure is provided between the transverse connecting outer arm (5) and the transverse telescopic inner arm (6) to maintain the selected extension position.

5. The microvascular anastomosis area suspension anti-traction fixation device according to claim 1, characterized in that: The adapter (13) is connected to the transverse telescopic inner arm (6) and the main support beam (7) respectively, so that the length direction of the main support beam (7) forms an angle with the telescopic direction of the transverse telescopic inner arm (6).

6. The microvascular anastomosis area suspension anti-traction fixation device according to claim 1, characterized in that: The cross-section of the groove-shaped support surface of the proximal U-shaped support (8) and the distal U-shaped support (10) is a continuous circular arc, an elliptical arc or a shallow U-shaped curved surface. The two sides of the groove-shaped support surface are higher than the middle support surface, and a flexible buffer layer is provided on the inner surface of the groove-shaped support surface.

7. The microvascular anastomosis area suspension anti-traction fixation device according to claim 1, characterized in that: The proximal fixation strap (9) and the distal fixation strap (11) are respectively positioned above the opening of the corresponding U-shaped fixation bracket, and at least one end is detachably connected to the corresponding U-shaped fixation bracket. The effective length of the proximal fixation strap (9) and the distal fixation strap (11) is adjustable.

8. The microvascular anastomosis area suspension anti-traction fixation device according to claim 1, characterized in that: The lower part of the distal U-shaped fixing bracket (10) is provided with a sliding mounting part, and the main support beam (7) is provided with a straight guide surface, guide rail or guide groove that cooperates with the sliding mounting part, so that the distal U-shaped fixing bracket (10) can move along the length direction of the main support beam (7) to adjust the distance between the distal U-shaped fixing bracket (10) and the proximal U-shaped fixing bracket (8).

9. The microvascular anastomosis area suspension anti-traction fixation device according to claim 8, characterized in that: The axial locking screw (12) engages with the threaded connection at the far end of the main support beam (7). The inner end of the axial locking screw (12) can abut against the sliding mounting part of the far-end U-shaped fixing bracket (10) or the limiting surface provided on the sliding mounting part, so as to restrict the far-end U-shaped fixing bracket (10) from continuing to move along the main support beam (7).

10. The microvascular anastomosis area suspension anti-traction fixation device according to claim 1, characterized in that: The proximal U-shaped fixation bracket (8) and the distal U-shaped fixation bracket (10) are spaced apart from each other along the long axis of the affected limb. The space forms a suspended space for accommodating microvascular anastomosis sites, open wounds, or flap pedicles. No continuous support surface is provided below the suspended space that spans the proximal U-shaped fixation bracket (8) and the distal U-shaped fixation bracket (10).

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