Movable severe spinal malformation traction device

Abstract

The movable severe spinal malformation traction device comprises a head ring, two universal rotating mechanisms, a pelvis fixing ring and a plurality of telescopic supporting rods, the two universal rotating mechanisms are connected to the left end and the right end of the head ring respectively, the size of the periphery of the pelvis fixing ring can be adjusted, and the pelvis fixing ring is located below the head ring. And the upper end of the telescopic supporting rod is connected with the universal rotating mechanism. The two ends of the head ring are connected with the telescopic supporting rods through the universal rotating mechanisms, so that the head ring can rotate in multiple directions relative to the telescopic supporting rods, the flexibility of the head of a patient is improved, neck stiffness is avoided, the comfort is improved, and different use scenes are adapted.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a movable traction device for severe spinal deformities. Background Technology

[0002] Adolescent idiopathic scoliosis (AIS) is one of the most common scoliosis deformities occurring during puberty. In the high-risk population aged 1-16 years, the incidence of AIS is 1%-3%, accounting for approximately 74.7% of all scoliosis cases. AIS causes spinal curvature and twisting, chest deformities, and affects patients' cardiopulmonary function and physical appearance, reducing their quality of life and seriously endangering their physical and mental health. Therefore, the treatment of AIS has become an extremely important part of orthopedic spinal surgery.

[0003] In the 1960s, traction devices such as head slings and pelvic slings were developed. Later, traction devices that used body weight as traction force and relied on external tools such as beds and wheelchairs to achieve the traction purpose were also developed. Cephalopelvic traction happens to be one of the effective preoperative surgical methods to slow down the increase in curvature. Early cephalopelvic traction was very important for corrective surgery for severe scoliosis, as it changed the flexibility of the severely deformed spine through traction.

[0004] Patients with scoliosis require long-term cervical traction. However, existing traction devices have the following drawbacks and shortcomings:

[0005] 1. Poor universal compatibility, resulting in a small gap between moving holes after assembly;

[0006] 2. Once the head is fixed, it cannot move, as this can easily cause neck stiffness;

[0007] 3. Unable to lie flat, the device severely occupies space behind the neck;

[0008] 4. Towing requires disassembling components, which is inconvenient.

[0009] 5. Traction requires prolonged hospital stay, lasting three months to a year, and necessitates long-term care from medical staff and family members. Prolonged traction can lead to stiffness in the neck and spine, often resulting in postoperative cervical spine complications such as pain and stiffness. Furthermore, the persistent stiffness may even lead to cervical dislocation.

[0010] 6. The anesthesia intubation is done through the nose. The traditional non-adjustable head frame needs to be removed to facilitate tilting the neck back for intubation. Utility Model Content

[0011] To address the shortcomings of existing technologies, this invention provides a movable traction device for severe spinal deformities, which primarily solves the problem of patients' heads being unable to move, easily leading to neck stiffness.

[0012] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0013] A movable traction device for severe spinal deformity, comprising:

[0014] Headband;

[0015] Two omnidirectional rotating mechanisms are connected to the left and right ends of the headband, respectively;

[0016] The pelvic fixation ring, with an adjustable circumference, is located below the head ring.

[0017] Multiple telescopic support rods are connected at their lower ends to a pelvic fixation ring and at their upper ends to a universal rotating mechanism to support the head ring.

[0018] Furthermore, the universal rotation mechanism includes a ball joint and a swing arm. One end of the ball joint is connected to the head ring, and the ball end of the ball joint and the swing arm are configured as a universal ball joint structure. The upper end of the telescopic support rod is connected to the swing arm.

[0019] Furthermore, the universal rotation mechanism also includes a bearing, a bearing housing, and a fastening cover. The ball end of the ball joint is placed in the spherical hole formed by the combination of the bearing housing and the fastening cover. The middle part of the rocker arm is provided with a mounting hole. The bearing housing is installed in the mounting hole, and the bearing is sleeved on the bearing housing and forms a hole-shaft fit with the mounting hole.

[0020] Furthermore, the upper end of the telescopic support rod is connected to the swing rod via a first connector. Both the first connector and the swing rod are provided with adjustment grooves. The first connector and the swing rod are fixed by bolts and nuts. The bolts pass through the adjustment grooves on the first connector and the swing rod and are locked with the nuts.

[0021] The telescopic support rod has an external thread at its upper end and is fitted with two nuts. The upper end of the telescopic support rod passes through the adjustment groove on the first connector. The telescopic support rod is locked to the first connector by the nuts distributed on the upper and lower sides of the first connector.

[0022] Furthermore, the lower end of the telescopic support rod is connected to the pelvic fixing ring through the second connector. The lower end of the telescopic support rod is provided with external threads and two nuts are fitted on it. The second connector is provided with an adjustment groove. The lower end of the telescopic support rod passes through the adjustment groove on the second connector. The telescopic support rod and the second connector are locked together by the nuts distributed on the upper and lower sides of the second connector.

[0023] Furthermore, the universal rotation mechanism includes a clamping assembly, which includes a base and a movable jaw. The base is connected to a ball joint rod and includes an upper clamping arm and a lower clamping arm. The movable jaw is located between the upper clamping arm and the lower clamping arm. The bottom surface of the movable jaw and the top surface of the lower clamping arm are both provided with grooves that match the head ring. The distance between the movable jaw and the lower clamping arm is adjustable. The movable jaw and the lower clamping arm cooperate to clamp the head ring.

[0024] Furthermore, the rear end of the headband is provided with an upwardly convex arc-shaped relief section to allow the patient to lie flat.

[0025] Furthermore, the telescopic support rod includes an inner rod, an outer tube, and a threaded sleeve. The threaded sleeve is rotatably fixed to one end of the outer tube and has a threaded hole. Both the outer tube and the threaded sleeve are sleeved on the inner rod. The inner rod has threads on its surface. The threaded sleeve and the inner rod are connected by a threaded engagement. When the threaded sleeve rotates, it drives the inner rod to move axially along the outer tube.

[0026] Furthermore, the outer tube is provided with a visible groove along the axial direction and is provided with a scale.

[0027] Furthermore, the pelvic fixation ring includes two U-shaped segments with multiple screw mounting holes. The two U-shaped segments are connected by passing screws through the screw mounting holes on the two U-shaped segments. The circumference of the pelvic fixation ring can be adjusted by installing screws in different screw mounting holes.

[0028] This utility model has the following beneficial effects:

[0029] 1. The headband is connected to a telescopic support rod at both ends via a universal rotating mechanism, allowing the headband to rotate in multiple directions relative to the telescopic support rod. This increases the flexibility of the patient's head, prevents neck stiffness, improves comfort, and adapts to different usage scenarios. During anesthesia intubation (nasal intubation), it does not require disassembly, allowing for neck movement adjustment and facilitating intubation.

[0030] 2. A bearing is added between the ball joint and the swing arm to make the ball joint rotate more smoothly and swing more flexibly, making it easier for patients to adjust their head position during use.

[0031] 3. The headband and pelvic fixation ring are covered with screw mounting holes, increasing the number of selectable fixing positions during product use and enhancing the product's adjustability. By adjusting the screw positions, the size of the pelvic fixation ring can be set, enabling multiple size adjustments to better match the pelvic fixation needs of different individuals.

[0032] 4. The telescopic support rod uses a combination of threaded sleeve and scale to increase the accuracy of size adjustment and the convenience of use.

[0033] 5. The advantage of the traction device head frame provided by this utility model is that it is movable, which greatly reduces spinal stiffness and complications caused by long-term continuous traction, and increases the safety of spinal traction.

[0034] 6. The improved traction device can be adjusted at home, eliminating the need for long-term hospitalization, making it more user-friendly. Furthermore, the reduced hospital stay significantly lowers related hospitalization and caregiver costs.

[0035] 7. The position of the telescopic support rod relative to the human spine can be flexibly adjusted through the adjustment grooves on the first and second connectors. The traction device provided by this utility model preserves the flexibility of the spine during surgery, and the entire muscle can recover faster and better before and after surgery. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the movable traction device for severe spinal deformity according to an embodiment of the present invention;

[0037] Figure 2 This is an assembly diagram of the universal rotating mechanism, head ring, and telescopic support rod;

[0038] Figure 3 This is a schematic diagram showing the connection between the telescopic support rod and the pelvic fixation ring;

[0039] Figure 4 This is a top view of a partial structure of the universal joint mechanism;

[0040] Figure 5 It is along Figure 4 Sectional view of line AA in the middle;

[0041] Figure 6 This is a schematic diagram of the pelvic fixation ring structure;

[0042] Figure 7 This is an exploded view of the pelvic fixation ring;

[0043] Figure 8 This is a partial structural diagram of the telescopic support rod;

[0044] Figure 9 It is along Figure 8 Sectional view of line AA in the middle;

[0045] Figure 10 It is an assembly diagram of the clamping components and the headband. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0047] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] like Figures 1 to 10 As shown, a movable traction device for severe spinal deformities includes a head ring 1, two universal rotating mechanisms 2, a pelvic fixation ring 3, and multiple telescopic support rods 4. The two universal rotating mechanisms 2 are respectively connected to the left and right ends of the head ring 1. The pelvic fixation ring 3, with an adjustable circumference, is located below the head ring 1. The multiple telescopic support rods 4 have their lower ends connected to the pelvic fixation ring 3 and their upper ends connected to the universal rotating mechanisms 2 to support the head ring 1. The telescopic support rods are connected to both ends of the head ring via the universal rotating mechanisms, allowing the head ring to rotate in multiple directions relative to the telescopic support rods, increasing the flexibility of the patient's head, preventing neck stiffness, improving comfort, and adapting to different usage scenarios. When performing anesthesia intubation (nasal intubation), traditional traction devices with fixed head movement need to be disassembled to facilitate the patient's neck tilting back for intubation. However, the traction device provided in this embodiment does not require disassembly and can satisfy the adjustment of neck movement, facilitating intubation.

[0050] The head ring 1 has an upwardly convex, arc-shaped relief section 5 at its rear end to allow for positioning when the patient is supine. The pelvic fixation ring 3 includes two U-shaped segments 6, each with multiple screw mounting holes 7. The two U-shaped segments 6 are connected by passing screws through these holes 7. Installing screws in different holes 7 allows for adjustment of the circumference of the pelvic fixation ring 3, enabling multiple size adjustments and better matching for different pelvic fixation needs. Both the head ring 1 and the pelvic fixation ring 3 have multiple screw mounting holes 7, increasing the available fixation positions for bone screws or pins and enhancing the product's adjustability.

[0051] The universal rotation mechanism 2 includes a ball joint 21 and a rocker arm 22. One end of the ball joint 21 is connected to the head ring 1. The ball end 211 of the ball joint 21 and the rocker arm 22 are configured as a universal ball joint structure. The upper end of the telescopic support rod 4 is connected to the rocker arm 22. Specifically, the universal rotation mechanism 2 includes a ball joint 21, a rocker arm 22, a bearing 23, a bearing seat 24, an end cap 25, and a fastening cap 26. The bearing seat 24 and the fastening cap 26 are provided with matching spherical holes. The bearing seat 24 is provided with external threads. The fastening cap 26 is connected to the bearing seat 24 by threads. The ball end 211 of the ball joint 21 is placed in the spherical hole formed by the combination of the bearing seat 24 and the fastening cap 26. The other end of the ball joint 21 passes through the fastening cap 26 and is fixed relative to the head ring 1. The swing arm 22 has a mounting hole in the middle, which is a stepped hole. The bearing seat 24 is located in the stepped hole, and the bearing 23 is sleeved on the bearing seat 24 and forms a hole-shaft fit with the stepped hole. The end cap 25 abuts against the end face of the bearing 23. The bearing seat 24, the stepped hole, and the end cap 25 cooperate to fix the bearing 23. The addition of the bearing 23 between the ball joint 21 and the swing arm 22 makes the ball joint 21 rotate more smoothly and swing more flexibly, making it easier for the patient to adjust the head position during use.

[0052] The end of the ball joint 21 near the head ring 1 can be fixedly connected to the head ring 1 by welding, integral molding, or other methods. In this embodiment, for example... Figure 10 The universal rotating mechanism 2 also includes a clamping assembly, which includes a base 28, a movable gripper 29, and an adjusting screw 27. The base 28 is fixedly connected to the ball joint 21 (e.g., by welding or screw connection). The base 28 includes an upper clamping arm 281 and a lower clamping arm 282. The movable gripper 29 is located between the upper clamping arm 281 and the lower clamping arm 282. The bottom surface of the movable gripper 29 and the top surface of the lower clamping arm 282 are both provided with grooves that match the head ring 1. The upper clamping arm 281 is provided with a threaded hole. The adjusting screw 27 is screwed into the threaded hole of the upper clamping arm 281, and its lower end abuts against the top surface of the movable gripper 29, thereby clamping the head ring 1 with the movable gripper 29 and the lower clamping arm 282. In this way, the clamping assembly and the head ring 1 form a detachable connection. The position of the universal rotating mechanism 2 relative to the head ring 1 can be finely adjusted according to the size of the patient's head circumference. The head ring 1 is locked in the groove, making the structure more stable and the head ring 1 less prone to shaking.

[0053] The upper end of the telescopic support rod 4 is connected to the swing rod 22 through the first connector 8. Both the first connector 8 and the swing rod 22 are provided with adjustment grooves 9. The first connector 8 and the swing rod 22 are fixed by bolts and nuts 10. The bolts pass through the adjustment grooves 9 on the first connector 8 and the swing rod 22 and are locked with the nuts 10.

[0054] Similarly, such as Figure 2The telescopic support rod 4 has an external thread at its upper end and is fitted with two nuts 10. The upper end of the telescopic support rod 4 passes through the adjusting groove 9 on the first connecting member 8, and the telescopic support rod 4 is locked to the first connecting member 8 by the nuts 10 distributed on the upper and lower sides of the first connecting member 8. Figure 3 The lower end of the telescopic support rod 4 is connected to the pelvic fixation ring 3 via a second connector 11. The lower end of the telescopic support rod 4 has external threads and is fitted with two nuts 10. The second connector 11 has an adjustment groove 9, through which the lower end of the telescopic support rod 4 passes. The nuts 10 distributed on the upper and lower sides of the second connector 11 lock the telescopic support rod 4 to the second connector 11. The end of the second connector 11 near the pelvic fixation ring 3 has a hook 13, which hooks onto the pelvic fixation ring 3 and is fixed to it with screws. Through the adjustment grooves 9 on the first connector 8 and the second connector 11, the position of the telescopic support rod 4 relative to the human spine can be flexibly adjusted. This traction device preserves the flexibility of the spine during surgery, allowing for faster and better muscle recovery before and after surgery.

[0055] The shape of the adjustment groove 9 includes, but is not limited to, a waist-shaped groove. For example, it can also be a multi-position adjustment groove 9 composed of multiple interconnected circular holes. The position and angle of the telescopic support rod 4 can be adjusted according to the patient's body shape via the adjustment groove 9, between the telescopic support rod 4 and the swing rod 22, and between the telescopic support rod 4 and the pelvic fixation ring 3, thus providing a better fit. Preferably, the first connecting member 8, the second connecting member 11, and the swing rod 22 are provided with anti-slip textures 12, making it less likely for the nut 10 to loosen when in contact with the anti-slip textures 12.

[0056] like Figure 8 and Figure 9 The telescopic support rod 4 includes an inner rod 41, an outer tube 42, and a threaded sleeve 43. The threaded sleeve 43 is rotatably fixed to one end of the outer tube 42 and has a threaded hole. Both the outer tube 42 and the threaded sleeve 43 are fitted onto the inner rod 41. The surface of the inner rod 41 is threaded. The threaded sleeve 43 and the inner rod 41 are connected by a threaded engagement. When the threaded sleeve 43 rotates, it drives the inner rod 41 to move axially along the outer tube 42, thereby making the length of the telescopic support rod 4 adjustable to match different heights. Preferably, the outer tube 42 has an axially visible groove 44 and a scale 45, which allows the adjustment amount to be seen intuitively. The combination of the threaded sleeve 43 and the scale forms a stepless adjustment, increasing the accuracy of size adjustment and the convenience of use.

[0057] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A movable traction device for severe spinal deformity, characterized in that, include: Headband; Two omnidirectional rotating mechanisms are connected to the left and right ends of the headband, respectively; The pelvic fixation ring, with an adjustable circumference, is located below the head ring. Multiple telescopic support rods are connected at their lower ends to a pelvic fixation ring and at their upper ends to a universal rotating mechanism to support the head ring.

2. The movable severe spinal deformity traction device according to claim 1, characterized in that: The universal rotation mechanism includes a ball joint and a swing arm. One end of the ball joint is connected to the head ring, and the ball end of the ball joint and the swing arm are configured as a universal ball joint structure. The upper end of the telescopic support rod is connected to the swing arm.

3. The movable severe spinal deformity traction device according to claim 2, characterized in that: The universal rotation mechanism also includes a bearing, a bearing housing, and a fastening cover. The ball end of the ball joint is placed in the spherical hole formed by the combination of the bearing housing and the fastening cover. The middle part of the swing rod is provided with a mounting hole. The bearing housing is installed in the mounting hole, and the bearing is sleeved on the bearing housing and forms a hole-shaft fit with the mounting hole.

4. The movable severe spinal deformity traction device according to claim 2, characterized in that: The upper end of the telescopic support rod is connected to the swing rod via a first connector. Both the first connector and the swing rod are provided with adjustment grooves. The first connector and the swing rod are fixed by bolts and nuts. The bolts pass through the adjustment grooves on the first connector and the swing rod and are locked with the nuts. The telescopic support rod has an external thread at its upper end and is fitted with two nuts. The upper end of the telescopic support rod passes through the adjustment groove on the first connector. The telescopic support rod is locked to the first connector by the nuts distributed on the upper and lower sides of the first connector.

5. The movable severe spinal deformity traction device according to claim 4, characterized in that: The lower end of the telescopic support rod is connected to the pelvic fixation ring through the second connector. The lower end of the telescopic support rod is provided with external threads and two nuts are fitted on it. The second connector is provided with an adjustment groove. The lower end of the telescopic support rod passes through the adjustment groove on the second connector. The telescopic support rod and the second connector are locked together by the nuts distributed on the upper and lower sides of the second connector.

6. The movable severe spinal deformity traction device according to claim 1, characterized in that: The universal rotation mechanism includes a clamping assembly, which includes a base and a movable jaw. The base is connected to a ball joint rod and includes an upper clamping arm and a lower clamping arm. The movable jaw is located between the upper clamping arm and the lower clamping arm. The bottom surface of the movable jaw and the top surface of the lower clamping arm are both provided with grooves that match the head ring. The distance between the movable jaw and the lower clamping arm is adjustable. The movable jaw and the lower clamping arm cooperate to clamp the head ring.

7. The movable severe spinal deformity traction device according to claim 6, characterized in that: The rear end of the headband has an upwardly convex arc-shaped relief section to allow the patient to lie flat.

8. The movable severe spinal deformity traction device according to claim 1, characterized in that: The telescopic support rod includes an inner rod, an outer tube, and a threaded sleeve. The threaded sleeve is rotatably fixed to one end of the outer tube and has a threaded hole. Both the outer tube and the threaded sleeve are sleeved on the inner rod. The inner rod has threads on its surface. The threaded sleeve and the inner rod are connected by a threaded engagement. When the threaded sleeve rotates, it drives the inner rod to move axially along the outer tube.

9. The movable severe spinal deformity traction device according to claim 8, characterized in that: The outer tube is provided with an axially visible groove and a scale.

10. The movable severe spinal deformity traction device according to claim 1, characterized in that: The pelvic fixation ring includes two U-shaped segments with multiple screw mounting holes. The two U-shaped segments are connected by passing screws through the screw mounting holes on the two U-shaped segments. The circumference of the pelvic fixation ring can be adjusted by installing screws in different screw mounting holes.

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