Lower limb skin traction device capable of reducing pressure risk

Abstract

The invention relates to the technical field of medical instruments, in particular to a lower limb skin traction device capable of reducing pressure risk, which comprises a traction assembly, the traction assembly comprises a binding device and a regulation and control device, and the binding device comprises a sleeve body and a plurality of air bags; when the binding device is bound on the lower limb of a patient, the sleeve body is cylindrical, the plurality of air bags are distributed around the central axis of the cylindrical sleeve body, and the length direction of the air bags is the same as the central axis direction of the sleeve body; at any moment, at least one air bag is in an underfilled state; a plurality of air bags are filled, and the plurality of filled air bags are used for extruding the lower limb area, so that the sleeve body is always in a tight state; the regulation and control device is used for controlling the inflation amount of the air bags so that any air bag can be switched between the full state and the under-full state. According to the lower limb skin traction device capable of reducing the pressure risk, the risk that a patient is crushed can be reduced, and the risk of thrombus occurrence can be reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a lower limb skin traction device that can reduce the risk of pressure. Background Technology

[0002] The lower limb skin traction device is a non-invasive orthopedic device that transmits traction force to the bones of the lower limbs through adhesive materials on the skin surface. Its core value lies in temporarily stabilizing the bones, reducing pain, preventing deformities, and buying time for definitive treatments such as surgery or plaster fixation.

[0003] When using a lower limb skin traction device, the device is typically first fixed to the patient's lower limb. Then, a traction rope connects the device to a weight. Under the action of a pulley system, the weight provides traction to pull the device, thus achieving the purpose of traction on the patient's lower limb. However, when fixing the device to the patient's lower limb, it is often tightened too much to ensure a more secure fit, increasing the risk of crush injury. Furthermore, throughout the traction process, the patient's lower limb remains continuously bound by the device. The continuous pressure exerted on the superficial veins of the lower limb by the device can cause local venous wall collapse, leading to endothelial cell rupture and exposure of collagen fibers. This activates clotting factors, increasing the risk of thrombosis.

[0004] Therefore, how to reduce the risk of crush injury and thrombosis in patients during the use of lower limb skin traction devices is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned shortcomings of current lower limb skin traction devices in practical use, and to provide a lower limb skin traction device that can reduce the risk of pressure injury, thereby reducing the risk of patient injury from pressure and the risk of thrombosis.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: A lower limb skin traction device that can reduce the risk of pressure injury includes a traction assembly, the traction assembly including a restraint device and an adjustment device, the restraint device including a sleeve and a plurality of air bladders, the air bladders being strip-shaped and disposed on the sleeve, the restraint device being used to tie to the patient's lower limbs; When the restraint device is strapped to the patient's lower limb, the sleeve is cylindrical, and several air bladders are distributed around the central axis of the cylindrical sleeve, with the length direction of the air bladders aligned with the central axis of the sleeve. At any given time, at least one air bladder is underinflated, and the lower limb area corresponding to the underinflated air bladder is not compressed by the underinflated air bladder. Meanwhile, several air bladders are inflated, and these inflated air bladders compress the lower limb area, ensuring that the sleeve remains taut at all times. The control device is used to control the inflation amount of several airbags so that any airbag can switch between an inflated and an underinflated state.

[0007] As the preferred technical solution of this application, the number of airbags on the sleeve is at least 8.

[0008] As the preferred technical solution of this application, the control device includes a device body and a rotating disk. The device body is provided with a plurality of air chambers, the number of which corresponds to the number of air bags. Each air chamber is connected to a single air bag. A piston rod is provided in each air chamber. The piston rod is used to abut against the inner wall of the rotating disk. A notch is provided on the inner wall of the rotating disk, so that the inner wall of the rotating disk is divided into a first inner wall and a second inner wall. The first inner wall is located at the notch, and the second inner wall is located at the non-notch. At any given moment, at least one piston rod is in contact with the first inner wall; The air bladder corresponding to the piston rod whose inner wall abuts the first is connected to the air bladder that is underfilled, and the air bladder corresponding to the piston rod whose inner wall abuts the second is connected to the air bladder that is infilled. The rotating disk is rotatably connected to the device body. When the rotating disk rotates relative to the device body, several piston rods can sequentially abut against the first inner wall.

[0009] As the preferred technical solution of this application, there are two abutment situations between the piston rod and the first inner wall, namely the first abutment situation and the second abutment situation. The number of piston rods abutting the first inner wall in the first abutment situation is a, and the number of piston rods abutting the first inner wall in the second abutment situation is b, where ab≥1; The tightness of the sleeve in the first offset state is less than that in the second offset state.

[0010] As the preferred technical solution of this application, the first inner wall includes an inner wall part and an inner wall part two. The inner wall part one is located at the bottom of the notch, and the inner wall part two is the transition area between the inner wall part one and the second inner wall. The inner wall part two is inclined.

[0011] As the preferred technical solution of this application, a spring is provided inside the air chamber. The spring is elastic, one end of the spring is connected to the bottom of the air chamber, and the other end is connected to the piston rod. When the piston rod abuts against the second inner wall, the spring is compressed; as the piston rod changes from abutting against the second inner wall to abutting against the first inner wall, the spring gradually recovers its deformation, and the spring provides a pushing force to push the piston rod to move relative to the air chamber, so as to draw the gas in the corresponding air bag into the air chamber.

[0012] As a preferred technical solution of this application, the traction assembly further includes a ventilator, the number of which is adapted to the number of airbags, with each airbag having a single ventilator, and the ventilator being used to connect the airbag and its corresponding air cavity.

[0013] As a preferred technical solution of this application, the control device further includes a motor, which is fixed on the device body. The output shaft of the motor is connected to the rotating disk so that when the output shaft of the motor is driven to rotate, the rotating disk can rotate relative to the device body. The speed of the motor is adjustable when it is driven to rotate.

[0014] As a preferred technical solution of this application, the sleeve body is provided with a hook and loop fastener female and a hook and loop fastener female, which are compatible with each other; the sleeve body can be unfolded into a strip shape, the hook and loop fastener female is located at one end of the sleeve body, and the hook and loop fastener female is located at the other end of the sleeve body; by attaching the hook and loop fastener female and the hook and loop fastener female together, the sleeve body can be transformed from an unfolded shape to a cylindrical shape.

[0015] As the preferred technical solution of this application, it includes two traction components, one of which has a restraint device for binding to the patient's thigh, and the other of which has a restraint device for binding to the patient's calf; the two restraint devices are connected by a connecting strap.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the scheme of this application, by setting a restraint device and an adjustment device, before traction is applied to the lower limb skin, the restraint device is first bound to the patient's lower limb. At this time, at least one air bladder is underinflated, and several air bladders are inflated. The inflated air bladders compress the lower limb area and keep the sheath taut at all times, thereby improving the stability of the relative position between the sheath and the lower limb during traction. Simultaneously, under the action of the adjustment device, the air bladders can switch between inflated and underinflated states. This allows adjustment of the distribution of underinflated air bladders on the overall air bladder configuration, ensuring that any air bladder can be underinflated. Furthermore, during the process of air bladders changing from inflated to underinflated or vice versa, the inflated air bladders ensure that the sheath remains taut. For underinflated air bladders, the corresponding... The lower limb area is not compressed by the airbag. After the airbag alternately becomes under-inflated, it can prevent the patient's lower limb from being under pressure for a long time, thereby avoiding continuous compression of the superficial veins of the lower limb, thus reducing the risk of lower limb crush injury and thrombosis. At the same time, when the airbag changes between under-inflated and inflated states, the restraint device can also massage the lower limb. The massage effect is based on the switching between compressed and uncompressed areas. The entire sleeve is always in a taut state, and the degree of tautness does not change significantly. Thus, this massage is gentle and will not cause damage to the stretched areas of the patient's lower limb. Therefore, under this massage effect, blood circulation in the patient's lower limb can be promoted without damaging the stretched areas, further reducing the risk of thrombosis. Furthermore, during the process of traction on the patient's lower limbs, since the restraint device is bound to the skin of the patient's lower limbs, when the patient's lower limbs are externally rotated, the patient's skin will usually be pulled along the circumferential direction of the lower limbs, which can easily cause misalignment between the epidermis and the dermis. However, in this application, since the airbags are strip-shaped, when several airbags can take turns changing from an inflated state to an inflated state, the degree of pulling on the patient's skin along the circumferential direction of the lower limbs can be alleviated, thereby reducing the degree and probability of misalignment between the epidermis and the dermis, and thus reducing the risk of epidermal peeling for the patient. 2. Furthermore, when the rotating disk rotates relative to the device body, the piston rod can change from abutting against the first inner wall to abutting against the second inner wall. As the rotating disk rotates, the relative position between the notch on the rotating disk and the device body changes, so that the number of piston rods abutting against the first inner wall at a certain moment is 'a', which is the first case, and the number of piston rods abutting against the first inner wall at another moment is 'b', which is the second case. In both the first and second cases, the tightness of the sleeve can meet the traction requirements, that is, it can ensure that the restraint device is firmly bound to the patient's lower limb. At the same time, since the tightness of the sleeve in the first abutting situation is less than the tightness of the sleeve in the second abutting state, the restraint device can press the entire bound area on the lower limb, and the degree of pressing can fluctuate with the change in tightness. In this way, it can further promote blood flow in the patient's lower limb and further reduce the risk of lower limb thrombosis. 3. When the piston rod abuts against the second inner wall, the spring is compressed; as the piston rod changes from abutting against the second inner wall to abutting against the first inner wall, the spring gradually recovers its deformation, and the spring provides a pushing force to push the piston rod to move relative to the air chamber, so as to draw the gas in the corresponding air bag into the air chamber. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of one embodiment of a lower limb skin traction device that can reduce the risk of pressure. Figure 2 This is a schematic diagram of the control component of one embodiment of a lower limb skin traction device that can reduce the risk of pressure. Figure 3 This is a partial structural diagram of the piston rod in one embodiment of a lower limb skin traction device that can reduce the risk of pressure. Figure 4 This is a schematic diagram of another perspective of one embodiment of the lower limb skin traction device that can reduce the risk of pressure. Figure 5 This application relates to a lower limb skin traction device that can reduce the risk of pressure. Figure 1 A schematic diagram of the structure of part A; Figure 6 This is a schematic diagram of the structure of two traction components connected in one embodiment of the lower limb skin traction device that can reduce the risk of pressure according to this application; The diagram shows: 1-traction assembly, 2-restraint device, 3-adjustment device, 4-sleeve body, 5-airbag, 6-device body, 7-rotating disc, 8-air chamber, 9-piston rod, 10-notch, 11-first inner wall, 12-second inner wall, 13-part one inner wall, 14-part two inner wall, 15-spring, 16-ventilation tube, 17-motor, 18-Hook and loop fastener, 19-Hook and loop fastener, 20-connecting strap. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention 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, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Example 1: This example provides a lower limb skin traction device that can reduce the risk of pressure. See [link to example]. Figures 1-3 As shown, it includes a traction component 1, which includes a restraint device 2 and an adjustment device 3. The restraint device 2 includes a sleeve 4 and several airbags 5. The airbags 5 are strip-shaped and are disposed on the sleeve 4. The restraint device 2 is used to tie the patient's lower limbs. When the restraint device 2 is bound to the patient's lower limb, the sleeve 4 is cylindrical, and a plurality of airbags 5 are distributed around the central axis of the cylindrical sleeve 4, with the length direction of the airbags 5 being in the same direction as the central axis of the sleeve 4; and at any given time, at least one airbag 5 is underinflated, and the lower limb area corresponding to the underinflated airbag 5 is not compressed by the underinflated airbag 5; and a plurality of airbags 5 are inflated, and the plurality of inflated airbags 5 compress the lower limb area, so that the sleeve 4 can always be taut. The control device 3 is used to control the inflation amount of several airbags 5 so that any airbag 5 can switch between an inflated state and an underinflated state.

[0024] In this application, by setting a restraint device 2 and an adjustment device 3, before traction is applied to the lower limb skin, the restraint device 2 is first bound to the patient's lower limb. At this time, at least one airbag 5 is underinflated, and several airbags 5 are inflated. These inflated airbags 5 compress the lower limb area and keep the sleeve 4 taut at all times. This improves the stability of the relative position between the sleeve 4 and the lower limb during traction. Simultaneously, under the action of the adjustment device 3, the airbags 5 can switch between inflated and underinflated states. This allows adjustment of the distribution of underinflated airbags 5 on the overall airbag 5, ensuring that any airbag 5 can be underinflated. Furthermore, during the process of airbags 5 changing from inflated to underinflated or vice versa, the several inflated airbags 5 ensure that the sleeve 4 remains taut. For underinflated airbags 5, the underinflated airbags... The lower limb area corresponding to the airbag 5 is not compressed by the airbag 5. After the airbag 5 alternately becomes an underinflated state, it can avoid the patient's lower limb being under pressure for a long time, thereby avoiding continuous pressure on the superficial veins of the lower limb, thus reducing the risk of lower limb crush injury and the risk of thrombosis. At the same time, when the airbag 5 changes between underinflated and inflated states, the restraint device 2 can also massage the lower limb. The massage effect is based on the switching between the compressed area and the uncompressed area. For the entire sleeve 4, the sleeve 4 is always in a taut state, and the degree of tautness does not change significantly. Thus, this massage is gentle and will not cause damage to the stretched area on the patient's lower limb. Therefore, under this massage effect, it can promote blood circulation in the patient's lower limb while ensuring that the stretched area on the patient's lower limb is not damaged, further reducing the risk of thrombosis. Furthermore, during the process of traction on the patient's lower limbs, since the restraint device 2 is bound to the skin of the patient's lower limbs, when the patient's lower limbs are externally rotated, the patient's skin will usually be pulled in the circumferential direction of the lower limbs, which can easily cause misalignment between the epidermis and the dermis. However, in this application, since the airbag 5 is strip-shaped, when several airbags 5 can alternately change from an inflated state to an inflated state, the degree of pulling of the patient's skin in the circumferential direction of the lower limbs can be alleviated, thereby reducing the degree and probability of misalignment between the epidermis and the dermis, and thus reducing the risk of epidermal peeling of the patient.

[0025] As a preferred embodiment, based on the above method, the number of airbags 5 on the sleeve 4 is at least 8.

[0026] Furthermore, the number of air bladders 5 on the sleeve 4 is at least 8, so as to provide enough inflated air bladders 5 to keep the sleeve 4 taut at all times, thereby improving the stability of the restraint device 2 when it is tied to the patient's lower limbs.

[0027] As a preferred embodiment, based on the above method, the control device 3 further includes a device body 6 and a rotating disk 7. The device body 6 is provided with a plurality of air chambers 8, the number of air chambers 8 corresponding to the number of air bags 5. Each air chamber 8 is connected to a single air bag 5. A piston rod 9 is provided in each air chamber 8. The piston rod 9 is used to abut against the inner wall of the rotating disk 7. A notch 10 is provided on the inner wall of the rotating disk 7, so that the inner wall of the rotating disk 7 is divided into a first inner wall 11 and a second inner wall 12. The first inner wall 11 is located at the notch 10, and the second inner wall 12 is located at the non-notch 10. At any given moment, at least one piston rod 9 is in contact with the first inner wall 11; The air bladder 5 corresponding to the piston rod 9 abutting the first inner wall 11 is connected to the air bladder 5 in a partially inflated state, and the air bladder 5 corresponding to the piston rod 9 abutting the second inner wall 12 is connected to the air bladder 5 in a fully inflated state. The rotating disk 7 is rotatably connected to the device body 6. When the rotating disk 7 rotates relative to the device body 6, a plurality of piston rods 9 can sequentially abut against the first inner wall 11.

[0028] Furthermore, by setting a notch 10 on the inner wall of the rotating disk 7, its inner wall is divided into a first inner wall 11 and a second inner wall 12. At any given time, at least one piston rod 9 is in contact with the first inner wall 11, so that the airbag 5 corresponding to the piston rod 9 is in a sub-inflated state. Thus, when the rotating disk 7 is driven to rotate relative to the device body 6, several piston rods 9 can sequentially abut against the first inner wall 11. Based on the arrangement sequence of the air chambers 8 corresponding to the arrangement sequence of the airbags 5, the sub-inflated airbags 5 on the sleeve 4 can change in a ring shape. This facilitates the switching of the airbags 5 between the sub-inflated and inflated states and maintains the stability of the restraint device 2 bound to the patient's lower limbs.

[0029] Example 2: Based on the technical solution of Example 1, further details are provided below. Figures 1-3 As shown, there are two types of contact between the piston rod 9 and the first inner wall 11: the first contact situation and the second contact situation. The number of piston rods 9 in the first contact situation that contact the first inner wall 11 is a, and the number of piston rods 9 in the second contact situation that contact the first inner wall 11 is b, where ab≥1; The tightness of the sleeve 4 under the first counteracting condition is less than that under the second counteracting condition.

[0030] Furthermore, when the rotating disk 7 rotates relative to the device body 6, the piston rod 9 can change from abutting against the first inner wall 11 to abutting against the second inner wall 12. As the rotating disk 7 rotates, the relative position between the notch 10 on the rotating disk 7 and the device body 6 changes, so that the number of piston rods 9 abutting against the first inner wall 11 at a certain moment is a, which is the first case, and the number of piston rods 9 abutting against the first inner wall 11 at another moment is b, which is the second case. In the first case or the second case, the tightness of the sleeve 4 can meet the traction requirements, that is, it can ensure that the restraint device 2 is firmly bound to the patient's lower limb. At the same time, since the tightness of the sleeve 4 in the first abutting case is less than the tightness of the sleeve 4 in the second abutting case, the restraint device 2 can press the entire bound area on the lower limb, and the degree of pressing can fluctuate with the change of tightness. In this way, it can further promote blood flow in the patient's lower limb and further reduce the risk of thrombosis in the lower limb. Preferably, the number of piston rods 9 that abut against the first inner wall 11 in the first case is 2, and the number of piston rods 9 that abut against the first inner wall 11 in the second case is 1.

[0031] As a preferred embodiment, based on the above method, the first inner wall 11 further includes an inner wall part 13 and an inner wall part 14. The inner wall part 13 is located at the bottom of the notch 10, and the inner wall part 14 is the transition area between the inner wall part 13 and the second inner wall 12. The inner wall part 14 is inclined.

[0032] Furthermore, by setting the inclined inner wall two parts 14, the inner wall two parts 14 are the past area of ​​the inner wall one part 13 and the second inner wall 12, thereby improving the smoothness of the piston rod 9 changing from abutting against the second inner wall 12 to abutting against the first inner wall 11, or from abutting against the first inner wall 11 to abutting against the second inner wall 12 during the rotation of the rotating disk 7.

[0033] As a preferred embodiment, based on the above method, a spring 15 is further provided in the air chamber 8. The spring 15 is elastic, one end of the spring 15 is connected to the bottom of the air chamber 8, and the other end is connected to the piston rod 9. When the piston rod 9 abuts against the second inner wall 12, the spring 15 is compressed; as the piston rod 9 changes from abutting against the second inner wall 12 to abutting against the first inner wall 11, the spring 15 gradually recovers its deformation, and the spring 15 provides a pushing force to push the piston rod 9 to move relative to the air chamber 8, so as to draw the gas in the corresponding air bag 5 into the air chamber 8.

[0034] Furthermore, by providing a spring 15, the piston rod 9 can always be in contact with the inner wall of the rotating disk 7, thereby improving the stability of the piston rod 9 moving relative to the air chamber 8.

[0035] In a preferred embodiment, based on the above method, the traction component 1 further includes a ventilation tube 16, the number of ventilation tubes 16 being adapted to the number of airbags 5, with each airbag 5 being adapted to a single ventilation tube 16, and the ventilation tube 16 being used to connect the airbag 5 and the corresponding air cavity 8.

[0036] Furthermore, by adapting a single airbag 5 to a single ventilator 16, one end of which is connected to the airbag 5 and the other end to the corresponding air chamber 8, the gas in the airbag 5 and the gas in the air chamber 8 can be exchanged, thereby facilitating the control of the inflation or deflation of the airbag 5. In this application, the vent pipe 16 is arranged on the surface of the sleeve 4. That is, after the air chamber 8 is connected to the vent pipe 16, the vent pipe 16 is attached to the surface of the sleeve 4. The attachment of the vent pipe 16 to the surface of the sleeve 4 is not shown in the figure. At the same time, several vent pipes 16 are combined into a whole pipe.

[0037] Example 3: Based on the technical solution of Example 2, further details are provided below. Figures 4-6 As shown, the control device 3 also includes a motor 17, which is fixed on the device body 6. The output shaft of the motor 17 is connected to the rotating disk 7 so that when the output shaft of the motor 17 is driven to rotate, the rotating disk 7 can rotate relative to the device body 6. When driving the motor 17 to rotate, the speed of the motor 17 is adjustable.

[0038] Furthermore, by setting up a motor 17, fixing the motor 17 to the device body 6, and connecting the output shaft of the motor 17 to the rotating disk 7, the rotating disk 7 rotates relative to the device body 6 when the output shaft of the driving motor 17 rotates. This facilitates control over the inflation or deflation state of the airbag 5. At the same time, the speed of the motor 17 is adjustable, thereby adjusting the speed at which the airbag 5 changes from an inflated state to a deflation state, thus improving the flexibility of the lower limb skin traction device of this application. Specifically, the specific model of the speed-adjustable motor 17 is prior art and will not be described here.

[0039] In a preferred embodiment, based on the above method, the sleeve 4 is further provided with a hook and loop fastener female sticker 18 and a hook and loop fastener female sticker 19, which are adapted to each other; the sleeve 4 can be unfolded into a strip shape, the hook and loop fastener female sticker 18 is located at one end of the sleeve 4, and the hook and loop fastener female sticker 19 is located at the other end of the sleeve 4; by attaching the hook and loop fastener female sticker 18 and the hook and loop fastener female sticker 19 together, the sleeve 4 can be transformed from an unfolded shape to a cylindrical shape.

[0040] Furthermore, by setting up a female hook and loop fastener 18 and a female hook and loop fastener 19, with the female hook and loop fastener 18 located at one end of the sleeve body 4 and the female hook and loop fastener 19 located at the other end of the sleeve body 4, the sleeve body 4 can unfold into a strip when the female hook and loop fastener 19 is separated from the female hook and loop fastener 18. When the sleeve body 4 is wrapped around the patient's lower limb and the female hook and loop fastener 19 is attached to the female hook and loop fastener 18, the sleeve body 4 forms a cylindrical structure that is bound to the patient's lower limb. This further improves the convenience of binding the restraint device 2 to or removing it from the patient's lower limb. At the same time, during the process of attaching the female hook and loop fastener 19 to the female hook and loop fastener 18, the diameter of the formed cylindrical structure can be adjusted by changing the position of the attachment of the female hook and loop fastener 19 to the female hook and loop fastener 18, thereby improving the fit between the restraint device 2 and the patient's lower limb. In the production process, the number of models of the restraint device 2 produced can be reduced to meet the needs of patients with different lower limb sizes. The model of the restraint device 2 refers to the diameter model of the formed cylindrical structure.

[0041] As a preferred embodiment, based on the above method, the lower limb skin traction device further includes two traction components 1, one of which has a restraint device 2 for binding to the patient's thigh, and the other of which has a restraint device 2 for binding to the patient's calf; the two restraint devices 2 are connected by a connecting strap 20.

[0042] Furthermore, by setting two traction components 1, the restraint device 2 on one traction component 1 is bound to the patient's thigh, and the restraint device 2 on the other traction component 1 is bound to the patient's calf. The two restraint devices 2 are connected by a connecting strap 20 so that the two restraint devices 2 form a whole, thereby enabling simultaneous traction of the thigh and calf during traction. In this application, the traction rope, footboard, pulley system and weights that are compatible with the traction component 1 are all prior art, and therefore will not be described in detail here.

[0043] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A lower limb skin traction device that reduces the risk of pressure injury, characterized in that: The device includes a traction assembly, which includes a restraint device and an adjustment device. The restraint device includes a sleeve and several airbags. The airbags are strip-shaped and are disposed on the sleeve. The restraint device is used to tie the patient's lower limbs. When the restraint device is strapped to the patient's lower limb, the sleeve is cylindrical, and several air bladders are distributed around the central axis of the cylindrical sleeve, with the length direction of the air bladders aligned with the central axis of the sleeve. At any given time, at least one air bladder is underinflated, and the lower limb area corresponding to the underinflated air bladder is not compressed by the underinflated air bladder. Meanwhile, several air bladders are inflated, and these inflated air bladders compress the lower limb area, ensuring that the sleeve remains taut at all times. The control device is used to control the inflation amount of several airbags so that any airbag can switch between an inflated and an underinflated state.

2. The lower limb skin traction device for reducing the risk of pressure as described in claim 1, characterized in that: The number of airbags on the sleeve is at least 8.

3. A lower limb skin traction device for reducing the risk of pressure as described in claim 2, characterized in that: The control device includes a device body and a rotating disk. The device body is provided with a plurality of air chambers, the number of which corresponds to the number of air bags. Each air chamber is connected to a single air bag. A piston rod is provided in each air chamber. The piston rod is used to abut against the inner wall of the rotating disk. A notch is provided on the inner wall of the rotating disk, dividing the inner wall of the rotating disk into a first inner wall and a second inner wall. The first inner wall is located at the notch, and the second inner wall is located at the non-notch. At any given moment, at least one piston rod is in contact with the first inner wall; The air bladder corresponding to the piston rod with the first inner wall abutting is connected to the air bladder that is underfilled, and the air bladder corresponding to the piston rod with the second inner wall abutting is connected to the air bladder that is infilled. The rotating disk is rotatably connected to the device body. When the rotating disk rotates relative to the device body, several piston rods can sequentially abut against the first inner wall.

4. A lower limb skin traction device for reducing the risk of pressure as described in claim 3, characterized in that: There are two types of contact between the piston rod and the first inner wall: the first contact situation and the second contact situation. The number of piston rods in the first contact situation that contact the first inner wall is 'a', and the number of piston rods in the second contact situation that contact the first inner wall is 'b', where ab ≥ 1. The tightness of the sleeve in the first offset state is less than that in the second offset state.

5. A lower limb skin traction device for reducing the risk of pressure as described in claim 4, characterized in that: The first inner wall includes an inner wall part and an inner wall part two. The inner wall part one is located at the bottom of the notch, and the inner wall part two is the transition area between the inner wall part one and the second inner wall. The inner wall part two is inclined.

6. A lower limb skin traction device for reducing the risk of pressure as described in claim 5, characterized in that: A spring is installed inside the air chamber. The spring is elastic. One end of the spring is connected to the bottom of the air chamber, and the other end is connected to the piston rod. When the piston rod abuts against the second inner wall, the spring is compressed; as the piston rod changes from abutting against the second inner wall to abutting against the first inner wall, the spring gradually recovers its deformation, and the spring provides a pushing force to push the piston rod to move relative to the air chamber, so as to draw the gas in the corresponding air bag into the air chamber.

7. A lower limb skin traction device for reducing the risk of pressure as described in claim 6, characterized in that: The traction assembly also includes a ventilation tube, the number of which is adapted to the number of airbags, with each airbag having a single ventilation tube, and the ventilation tube being used to connect the airbag to its corresponding air chamber.

8. A lower limb skin traction device for reducing the risk of pressure as described in claim 7, characterized in that: The control device also includes a motor, which is fixed on the device body. The output shaft of the motor is connected to the rotating disk so that when the output shaft of the motor is driven to rotate, the rotating disk can rotate relative to the device body. The speed of the motor is adjustable when it is driven to rotate.

9. A lower limb skin traction device for reducing the risk of pressure as described in claim 8, characterized in that: The sleeve is provided with a hook and loop fastener and a hook and loop fastener that are compatible with each other; the sleeve can be unfolded into a strip shape, with the hook and loop fastener located at one end of the sleeve and the hook and loop fastener located at the other end of the sleeve; by attaching the hook and loop fastener together, the sleeve can be transformed from an unfolded shape to a cylindrical shape.

10. A lower limb skin traction device for reducing the risk of pressure as described in claim 9, characterized in that: It includes two traction components, one of which has a restraint device for securing to the patient's thigh, and the other of which has a restraint device for securing to the patient's calf; the two restraint devices are connected by a connecting strap.

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