Gypsum fixation auxiliary device for limb fracture

Abstract

The invention discloses a plaster fixation auxiliary device for limb fracture, and relates to the technical field of bone correction medical appliances, the plaster fixation auxiliary device comprises two groups of air pipes, the air pipes are provided with a plurality of air injection holes distributed at equal intervals, and a plaster board is provided with slots for inserting the air pipes. The surface of the side, close to the inserting groove, of the gypsum board is bonded with breathable gauze, one end of each air pipe is communicated with an air guide block, the air guide blocks are communicated with hoses, the hoses are communicated with an air guide frame, and the air guide frame is communicated with a first fixing shell. Clean breeze is continuously conveyed to the skin surface through the equidistant air injection holes in the air pipe, sweat evaporation is promoted, local dryness is maintained, the fixing rigidity of gypsum is considered, meanwhile, the microenvironment in gypsum is remarkably improved, common skin complications such as dermatitis, eczema and folliculitis caused by damp and hot dipping are effectively avoided, and the skin care effect is good. The comfort level and the treatment compliance of the patient are improved.

Description

Technical Field

[0001] This invention relates to the technical field of orthopedic medical devices, and more particularly to a plaster cast fixation auxiliary device for limb fractures. Background Technology

[0002] In orthopedic clinical treatment, plaster cast immobilization is often used to restrict the movement of the affected limb and provide a stable mechanical environment for tissue repair in cases of fractures, severe ligament injuries, or postoperative immobilization. Traditional plaster casts (including plaster powder casts or polymer synthetic casts) form a hard and dense shell after hardening in water. Although they can effectively maintain fracture reduction, the material itself has almost no breathability.

[0003] Because the plaster cast completely covers the limb, the inner skin cannot effectively exchange air with the outside environment. Especially when the temperature is high or the patient sweats after activity, sweat is difficult to evaporate and accumulates between the skin and the plaster cast, forming a hot and humid closed microenvironment. This environment not only causes persistent itching, burning sensations, and other subjective discomforts, but also easily leads to maceration and softening of the stratum corneum, damaging the skin barrier function, and thus inducing contact dermatitis, eczema, folliculitis, or even bacterial or fungal infections, seriously affecting the patient's quality of life and recovery process.

[0004] Currently, clinical treatment mainly involves instructing patients to keep the environment cool, avoid scratching, or apply topical antipruritic ointments to relieve symptoms, but these methods cannot fundamentally improve ventilation within the plaster cast. Although some studies have attempted to perforate the plaster surface or use mesh padding, the former weakens the structural strength, while the latter has limited breathability and cannot actively repel moisture.

[0005] Therefore, there is an urgent need for a technical solution that can actively, continuously, and controllably deliver clean airflow into the plasterboard without sacrificing its rigidity, thereby dynamically regulating the skin's surface temperature and humidity. This invention addresses this need by embedding air pipes with jet nozzles within the plasterboard, along with a matching air guiding, regulating, and power system, to construct a closed internal ventilation circuit. This effectively solves the problems of stuffy, damp skin caused by the sealed nature of plasterboard and the resulting series of complications. Summary of the Invention

[0006] To overcome the shortcomings of plaster casts in achieving both rigid fixation and adequate internal microenvironment, this invention provides a plaster cast fixation auxiliary device for limb fractures.

[0007] A plaster cast fixation aid for limb fractures includes two sets of air tubes with multiple equally spaced air jets. A slot for inserting the air tubes is formed in the plasterboard. Breathable gauze is adhered to the side of the plasterboard near the slot. An air guide block connects one end of each set of air tubes, and a flexible tube connects to the air guide block. An air guide frame connects to each flexible tube, and a first fixing shell connects to the air guide frame. A motor is fixedly connected inside the first fixing shell. The first fixing shell has at least one air inlet, and a first filter is fixedly connected to each air inlet. A first blade is rotatably connected inside the first fixing shell, and the output shaft of the motor is fixedly connected to the first blade.

[0008] More preferably, a fixing bolt is rotatably connected to the hose, and the fixing bolt is threadedly connected to the air guide block on the same side.

[0009] More preferably, the first fixed housing is provided with two non-communicating chambers, wherein the motor is located in one chamber, the first blade is located in the other chamber, and the air inlet of the first fixed housing is located in each chamber.

[0010] More preferably, a regulating valve is rotatably connected inside the air guide frame, a knob is fixedly connected to the outer end of the regulating valve, and regulating ports are symmetrically distributed along the regulating valve. The regulating valve communicates with the air guide frame through the regulating ports.

[0011] More preferably, the adjustment port is triangular in shape.

[0012] More preferably, the air guide frame is fixedly connected to a second fixed shell symmetrically distributed along the air guide frame, a transparent plate is fixedly connected to the second fixed shell, an air passage is opened inside the second fixed shell, the air passage is connected to the hose on the same side, and an air vent is opened on the second fixed shell.

[0013] More preferably, a sliding plug is slidably connected inside the second fixed shell on the side near the transparent plate. Initially, the sliding plug is blocked by the second fixed shell, and a spring is fixed between the sliding plug and the air guide frame.

[0014] More preferably, a second blade is provided in the cavity of the first fixed housing near the motor, the second blade is fixedly connected to the output shaft of the motor, and a second filter screen is fixedly connected to the port of the first fixed housing near the motor.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention continuously delivers clean air to the skin surface through equidistant jet holes on the trachea, promotes sweat evaporation, maintains local dryness, and while maintaining the rigidity of plaster fixation, significantly improves the microenvironment inside the plaster, effectively avoids common skin complications such as dermatitis, eczema, and folliculitis caused by damp heat, and improves patient comfort and treatment compliance.

[0016] This invention utilizes a rotatable triangular regulating valve and a symmetrical air guiding structure to dynamically adjust the air volume distribution of the two tracheas according to the patient's sweating location (such as the elbow crease or ankle joint), achieving "on-demand air supply," which not only strengthens dehumidification in key areas but also avoids excessive blowing in non-critical areas, preventing them from getting cold or dry.

[0017] This invention, through the combination of a sliding plug, a spring, and a transparent observation window within the second fixed housing, allows for a direct assessment of which side of the trachea is blocked without removing the plaster cast, significantly simplifying the troubleshooting process and ensuring the long-term effective operation of the device.

[0018] This invention isolates airflow from the motor through a dual-chamber structure, and with the independent cooling air duct formed by the second blade and the second filter, it protects the motor from moisture corrosion, effectively controls temperature rise, and extends the life of the whole machine, making it suitable for long-term continuous use scenarios. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a bottom view of a portion of the three-dimensional structure of the present invention.

[0021] Figure 3 This is a three-dimensional structural diagram of the components of the present invention, including the trachea, the first filter, and the first blade.

[0022] Figure 4 This is a three-dimensional structural diagram of the regulating valve and knob of the present invention.

[0023] Figure 5 This is a three-dimensional structural diagram of the regulating valve, transparent plate, and hose components of the present invention.

[0024] Figure 6 This is a three-dimensional structural diagram of the components of the present invention, such as the sliding plug, spring, and air guide frame.

[0025] Figure 7 This is a three-dimensional structural diagram of the components of the present invention, including the motor, the second filter, and the second blade.

[0026] The components in the attached diagram are labeled as follows: 101, plasterboard; 102, breathable gauze; 103, air tube; 104, air guide block; 105, hose; 106, fixing bolt; 107, air guide frame; 108, first fixing shell; 109, motor; 110, first filter screen; 111, first blade; 201, regulating valve; 202, knob; 203, regulating port; 301, second fixing shell; 302, transparent plate; 303, air passage; 304, sliding plug; 305, spring; 306, vent; 401, second blade; 402, second filter screen. Detailed Implementation

[0027] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1: This invention relates to an auxiliary device for plaster cast fixation of limb fractures, aiming to solve problems such as skin stuffiness, dampness, itching, and secondary skin complications caused by poor breathability during traditional plaster cast fixation. This device integrates a micro-airflow circulation system to achieve continuous, controllable, and directional ventilation of the skin covering the limb without compromising the integrity of the plaster cast structure, significantly improving patient comfort and treatment safety.

[0029] like Figures 1 to 3 As shown, the auxiliary device mainly includes breathable gauze 102, two sets of air tubes 103, air guide block 104, hose 105, fixing bolt 106, air guide frame 107, first fixing shell 108, motor 109, first filter screen 110, first blade 111, and other core components. Specifically, each set of air tubes 103 consists of two flexible, hollow tubular structures with multiple evenly spaced air jets on their walls to evenly spray airflow onto the skin surface inside the plaster. The plasterboard 101 is made of malleable polymer material or traditional plaster substrate, with a slot on one side for embedding the air tubes 103. The slot extends along the length of the plasterboard 101 to ensure that the air tubes 103 can be securely accommodated. A layer of medical-grade breathable gauze 102 is adhered to the surface of the plasterboard 101 near the slot. This gauze not only has good moisture permeability and breathability but also stably wraps the air tubes 103 during the plaster molding process, preventing displacement.

[0030] Each air tube 103 has its right end connected to an air guide block 104, which serves as an airflow distribution hub. The other end of the air guide block 104 is connected to a flexible hose 105. A fixing bolt 106 is rotatably connected to the hose 105, and the fixing bolt 106 is threadedly connected to the air guide block 104 on the same side, thus enabling the hose 105 to be attached and detached from the air guide block 104. The two hoses 105 further converge into an air guide frame 107, which has an internal airflow channel for distributing external airflow to the hoses 105 on both sides as needed. The right end of the air guide frame 107 is connected to a first fixed housing 108, which serves as the power source and filtration unit for the entire airflow system. A motor 109 is fixedly connected inside the first fixed housing 108, and a first blade 111 is rotatably connected inside the first fixed housing 108. The output shaft of the motor 109 is fixedly connected to the first blade 111. The first fixed shell 108 has at least one air inlet on its shell, and each air inlet is equipped with a first filter 110 to filter large particulate impurities such as dust and hair in the intake air, so as to ensure the cleanliness of the airflow entering the gypsum.

[0031] In use, firstly, insert the two sets of tracheas 103 into the corresponding slots of the plasterboard 101. Then, cover and adhere the breathable gauze 102 to the surface of the plasterboard 101 to completely cover and fix the tracheas 103. Next, wrap the plasterboard 101 with the tracheas 103 and gauze around the patient's fractured limb to shape it into a cylindrical plaster tube. At this point, the breathable gauze 102 is directly attached to the patient's skin surface, while the tracheas 103 are located between the gauze and the plasterboard 101. After the plaster has cured, wrap several more layers of regular fixing gauze around its outer surface to enhance the overall strength. After the fixation is completed, the motor 109 is started. The motor 109 drives the first blade 111 to rotate at high speed, creating a negative pressure in the first fixed shell 108. External air is filtered by the first filter screen 110 and then drawn into the shell. It then passes through the air guide frame 107, the hose 105, and the air guide block 104 in sequence into the air tube 103, and is finally sprayed evenly from each jet hole, creating a breeze environment. This allows the skin to effectively exchange with the outside air, promotes the evaporation of sweat on the skin surface, keeps the area dry, and avoids discomfort such as stuffiness, dampness, and itching on the local skin.

[0032] Example 2: Based on Example 1, as follows Figure 3 and Figure 4As shown, to further enhance the flexibility of airflow control, a regulating valve 201 is rotatably connected inside the air guide frame 107, and a knob 202 is fixed to the outer end of the regulating valve 201 for easy manual operation. The regulating valve 201 has triangular regulating ports 203 symmetrically distributed along its axis. In the initial state, the communication area between the two regulating ports 203 and the internal channel of the air guide frame 107 is equal, achieving balanced airflow in the left and right tracheas 103. When a patient experiences significant dampness or itching in a specific area (such as the elbow crease or the inner side of the ankle), the angle of the regulating valve 201 can be adjusted by rotating the knob 202: for example, rotating clockwise decreases the opening of the front regulating port 203 and increases the opening of the rear port, thereby directing more airflow to the rear trachea 103, achieving "precise microclimate management"; conversely, rotating counterclockwise decreases the opening of the rear regulating port 203 and increases the opening of the front port, thereby directing more airflow to the front trachea 103. This design increases the airflow near specific areas and decreases it away from specific areas, thus concentrating limited airflow resources on the parts that need heat dissipation and dehumidification the most. This avoids localized cooling or dryness caused by indiscriminate strong winds and improves the level of personalized care.

[0033] In addition, such as Figures 5 to 6 As shown, to facilitate the determination of whether the airway 103 is blocked, second fixed shells 301 are symmetrically fixed to the front and rear sides of the air guide frame 107. Each second fixed shell 301 is equipped with a transparent plate 302. An air passage 303 communicating with the corresponding hose 105 is opened inside the second fixed shell 301. A vent 306 is provided at the end of the second fixed shell 301 near the air guide frame 107. A sliding plug 304 is slidably connected to the side of the second fixed shell 301 near the transparent plate 302. The sliding plug 304 is connected to the air guide frame 107 by a spring 305. In the initial state, the spring 305 is in the natural state, and the sliding plug 304 is limited to a position away from the transparent plate 302.

[0034] When the jet nozzle of the trachea 103 is severely blocked, the trachea 103 needs to be removed for cleaning. However, it is difficult to determine with the naked eye whether the jet nozzle of the trachea 103 is blocked or which side of the trachea 103 is blocked. Therefore, the following operation facilitates a visual judgment: Turn the knob 202 to drive the regulating valve 201 to rotate, so that the regulating port 203 on one side is completely closed, while the regulating port 203 on the side to be tested remains open. In this way, the gas enters the hose 105, the air guide block 104, and the trachea 103 on the side where the regulating port 203 is open in sequence through a single channel. If the jet nozzle of the trachea 103 on that side is severely blocked, the gas in the hose 105 on that side will continuously accumulate, and the internal air pressure will continuously increase. It will then enter the second fixed shell 3 through the air passage 303 on that side. The gas inside the 01 pushes the sliding plug 304 toward the side where the spring 305 is compressed, creating a momentary high-speed airflow jet at the second fixed shell 301 (similar to the "air hammer" effect). The high-speed gas is discharged through the vent 306. Through the transparent plate 302, it can be directly observed that the sliding plug 304 is squeezed to the transparent plate 302. If the jet hole of the air pipe 103 on that side is almost unblocked, the gas is mainly discharged normally through the jet hole of the air pipe 103. At this time, the air pressure inside the second fixed shell 301 is low and insufficient to counteract the elastic force of the spring 305. Through the transparent plate 302, it can be directly observed that the sliding plug 304 has not been squeezed to the transparent plate 302. In this way, the air pipe 103 on the faulty side can be quickly located, which is convenient for subsequent maintenance.

[0035] Example 3: Based on Example 2, it is worth mentioning that, as Figure 7 As shown, the first fixed housing 108 adopts a dual-chamber isolation design, with the two chambers not communicating with each other. The right chamber houses the motor 109, and the left chamber houses the first blade 111. Each chamber has an independent air inlet and a corresponding first filter 110, ensuring that the airflow path is physically isolated from the operating space of the motor 109. Furthermore, a second filter 402 is fixedly connected to the port on the right side of the first fixed housing 108. Inside the chamber where the motor 109 is located, a second blade 401 is also fixedly connected to the output shaft of the motor 109. When this blade rotates synchronously, it can draw in cooling airflow from the outside, flow over the surface of the motor 109, and then exit the housing through the second filter 402, effectively reducing the temperature rise of the motor 109, extending the service life of the equipment, and ensuring long-term operational reliability.

[0036] In summary, this device, through its structured integration of ventilation, filtration, air conditioning, blockage detection, and heat dissipation functions, creates an intelligent, safe, and comfortable internal microenvironment while maintaining the rigidity of plaster fixation. It fundamentally solves the skin complications caused by traditional plaster fixation and has outstanding clinical practical value.

[0037] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be defined not only by the appended claims, but also by their equivalents.

Claims

1. A plaster cast immobilization aid for limb fractures, characterized in that: It includes two sets of air tubes (103), each air tube (103) having multiple equally spaced air jet holes. A plasterboard (101) has slots for inserting the air tubes (103). A breathable gauze (102) is adhered to the side of the plasterboard (101) near the slots. Each set of air tubes (103) has an air guide block (104) connecting one end to the other. A flexible tube (105) is connected to each air guide block (104). An air guide frame (107) is connected between the two sides. A first fixed shell (108) is connected to the air guide frame (107). A motor (109) is fixedly connected inside the first fixed shell (108). At least one air inlet is on the first fixed shell (108). A first filter screen (110) is fixedly connected to each air inlet. A first blade (111) is rotatably connected inside the first fixed shell (108). The output shaft of the motor (109) is fixedly connected to the first blade (111).

2. A plaster cast fixation auxiliary device for limb fractures according to claim 1, characterized in that: A fixing bolt (106) is rotatably connected to the hose (105), and the fixing bolt (106) is connected to the air guide block (104) on the same side by a thread.

3. A plaster cast fixation auxiliary device for limb fractures according to claim 2, characterized in that: The first fixed housing (108) is provided with two non-communicating chambers, wherein the motor (109) is located in one chamber, the first blade (111) is located in the other chamber, and the air inlet of the first fixed housing (108) is located in each chamber.

4. A plaster cast fixation auxiliary device for limb fractures according to claim 3, characterized in that: An adjusting valve (201) is rotatably connected inside the air guide frame (107). A knob (202) is fixed to the outer end of the adjusting valve (201). Adjusting ports (203) are symmetrically distributed along the adjusting valve (201) on the adjusting valve (201). The adjusting valve (201) communicates with the air guide frame (107) through the adjusting ports (203).

5. A plaster cast fixation auxiliary device for limb fractures according to claim 4, characterized in that: The adjustment port (203) is triangular in shape.

6. A plaster cast fixation auxiliary device for limb fractures according to claim 5, characterized in that: The air guide frame (107) is fixedly connected to a second fixed shell (301) symmetrically distributed along the air guide frame (107). A transparent plate (302) is fixedly connected to the second fixed shell (301). An air passage (303) is opened inside the second fixed shell (301). The air passage (303) communicates with the hose (105) on the same side. An air vent (306) is opened on the second fixed shell (301).

7. A plaster cast fixation auxiliary device for limb fractures according to claim 6, characterized in that: A sliding plug (304) is slidably connected to the side of the second fixed shell (301) near the transparent plate (302). Initially, the sliding plug (304) is blocked by the second fixed shell (301), and a spring (305) is fixed between the sliding plug (304) and the air guide frame (107).

8. A plaster cast fixation auxiliary device for limb fractures according to claim 7, characterized in that: A second blade (401) is provided in the cavity of the first fixed shell (108) near the motor (109). The second blade (401) is fixedly connected to the output shaft of the motor (109). A second filter screen (402) is fixedly connected to the port of the first fixed shell (108) near the motor (109).

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