Modular pneumatic humeral fracture abduction brace

Abstract

The present application relates to the technical field of fracture brace, particularly relates to a modular inflatable proximal humerus fracture abduction brace, comprising an upper arm fixing assembly for wrapping and fixing the upper arm of the humerus fracture, two groups of compression air bags are installed on the inner wall of the upper arm fixing assembly, a forearm support assembly is used for supporting the forearm of the patient, a modular inflatable assembly is used for inflating the compression air bags and intelligently applying medicine to the upper arm of the patient, by arranging two groups of compression air bags on the inner wall of the upper arm fixing assembly, and multiple independent micro air bags are arranged in the compression air bags, each air bag is independently connected with a micro electric control air valve, and the controller in the control end and the inflation pump are matched, the accurate differential pressure on different areas around the humerus is realized, the pressure sensing points prearranged in the slow pressure lining on the surface of the compression air bag can monitor the pressure values of each area in real time and feed back to the controller, a closed loop control is formed, and the clinical problem of uneven pressure distribution of the traditional brace is effectively solved.

Description

Technical Field

[0001] This application relates to the field of fracture brace technology, and in particular to a modular inflatable abduction brace for proximal humeral fractures. Background Technology

[0002] Proximal humeral fractures are a common type of upper limb fracture in clinical practice, accounting for approximately 4%-5% of all fractures, with a particularly high incidence in elderly individuals with osteoporosis. For proximal humeral fractures without significant displacement or that can be stabilized after manual reduction, non-surgical treatment typically involves external fixation with a shoulder abduction brace to maintain alignment of the fracture ends and promote callus healing.

[0003] Currently, commonly used abduction braces for proximal humeral fractures fall into two main categories: one is the traditional rigid plastic or aluminum alloy abduction brace, which stabilizes the fracture ends by fixing the shoulder joint in an abduction and flexion position using leverage; the other is an adjustable abduction brace, which adjusts the abduction angle through hinges or telescopic rods. However, existing technologies still have the following shortcomings in clinical application: First, existing abduction braces mostly use a rigid shell with a sponge lining, which cannot apply differentiated pressure to different areas around the fracture. Due to the irregular anatomical shape of the upper arm, the proximal humerus, the humeral shaft, and the areas where nerves and blood vessels run have significantly different tolerances to pressure—the fracture ends need moderate pressure to maintain stability, while the areas where the axillary nerve, radial nerve, and vascular bundles run need to avoid excessive compression.

[0004] Secondly, proximal humeral fractures are often accompanied by soft tissue contusions, surgical incisions, or tension blisters, requiring regular wound observation, disinfection, and medication changes. Existing braces are all one-piece structures, and the entire brace must be disassembled when applying medication or changing dressings, and then put back on after treatment. This process is not only cumbersome and time-consuming, but more importantly, the affected limb inevitably shifts and shakes during disassembly and re-wearing, causing micro-movements at the fracture ends, resulting in severe pain, and even causing the reduced fracture fragments to shift again, causing secondary injury.

[0005] Third, existing abduction braces only have basic fixation and support functions and cannot achieve deep integration with treatment. When it is necessary to regularly spray growth factors, analgesics or anti-inflammatory drugs onto the fracture area, it depends entirely on manual operation by medical staff, without any standardized and precise drug delivery assistance devices.

[0006] To address the aforementioned problems, this invention proposes a modular inflatable abduction brace for proximal humeral fractures, which enables zoned differential pressure adjustment and has a contactless intelligent drug delivery function, thereby improving the accuracy of fracture fixation, the convenience of treatment operations, and the patient's wearing comfort. Summary of the Invention

[0007] To address the problems existing in the background art, the present invention proposes a modular inflatable abduction brace for proximal humeral fractures.

[0008] This application provides a modular inflatable abduction brace for proximal humeral fractures, employing the following technical solution: A modular inflatable abduction brace for proximal humeral fractures includes an upper arm fixation component for wrapping and fixing the upper arm with a humeral fracture. The lower end of the upper arm fixation component is equipped with a connecting buckle, and an installation groove is provided on the rear side of the upper arm fixation component. Two sets of compression airbags are installed on the inner wall of the upper arm fixation component.

[0009] The forearm support assembly is used to support the patient's forearm and is connected to the upper arm fixation assembly via a connecting buckle.

[0010] The modular inflatable assembly, installed on the back of the upper arm fixation assembly, is used to inflate the compression airbag and to intelligently administer medication to the patient's upper arm.

[0011] Furthermore, the upper arm fixing assembly includes a fixing bracket, a tightening strap, and a pressure pad. The fixing bracket has an arc-shaped structure and is made of lightweight plastic with a microporous structure. The lower end of the fixing bracket is provided with an inclined bevel. Tightening straps are symmetrically installed on the opening at the front end of the fixing bracket. The fixing bracket has a receiving cavity for accommodating the upper arm, and the diameter of the receiving cavity gradually decreases from top to bottom. Pressure pads are installed at the upper and lower ends of the inner wall of the fixing bracket. Two sets of pressure airbags are arranged between the two pressure pads and are located on both sides of the mounting groove.

[0012] Furthermore, the compression pad has a multi-layer composite structure, with an outer layer of antibacterial and quick-drying fabric, a middle layer of absorbent cotton or gel pad, and a bottom layer of leak-proof isolation layer.

[0013] Furthermore, the compression airbag is equipped with multiple independent airbags inside, each airbag is connected to a micro air valve, and the surface of the compression airbag is provided with a pressure-relieving liner, in which pressure sensing points corresponding to the airbags are preset.

[0014] Furthermore, the forearm support assembly includes a support frame and a connecting strap. The upper left end of the support frame is provided with an inclined bevel, and the upper end of the support frame is provided with a support groove for supporting the forearm. A flexible pad is installed on the inner wall of the support groove, and the connecting straps are symmetrically installed on the upper end of the support frame.

[0015] Furthermore, a female buckle is installed on the outer wall of the support frame, and a connecting rope is installed at the front end of the fixed bracket. The connecting rope is connected to the female buckle through a male buckle.

[0016] Furthermore, the modular inflation assembly includes a control end, a housing, a liquid inlet pipe, and a drug delivery unit. The control end is installed at the lower rear end of the fixed bracket, and the housing is installed at the upper end of the control end. The inner side of the housing is in close contact with the mounting groove, and the liquid inlet pipe is installed at the upper outer side of the housing. A movable groove is opened on the inner side of the housing, and the drug delivery unit is installed on the movable groove. The liquid inlet pipe is connected to the drug delivery unit.

[0017] Furthermore, a control button is installed on the outer surface of the control terminal, and the control terminal integrates a controller, an air pump, and a power supply battery. The control button, air pump, and power supply battery are electrically connected to the controller, and the air pump is connected to the compression airbag.

[0018] Furthermore, the drug delivery unit includes a lifting slide rail and a slider. The lifting slide rail is symmetrically installed inside the movable groove, and the slider is installed on the lifting slide rail. The slider has an arc-shaped structure and is connected to the liquid inlet pipe through a flexible tube. Spray holes are evenly opened on the concave surface of the slider.

[0019] Beneficial effects Compared with the prior art, the present invention provides a modular inflatable abduction brace for proximal humeral fractures, which has the following beneficial effects: 1. In this invention, by setting two sets of compression airbags on the inner wall of the upper arm fixation component, and by setting multiple independent micro airbags inside the compression airbags, each airbag is independently connected to a micro electronically controlled air valve. Together with the controller and inflation pump inside the control end, precise and differentiated pressure is applied to different areas around the humerus. At the same time, the pressure sensing points preset in the pressure-relieving liner on the surface of the compression airbag can monitor the pressure value of each area in real time and feed it back to the controller, forming a closed-loop control. This effectively solves the clinical problem of "uneven pressure distribution and neglect of some areas" in traditional braces. While ensuring the stability of the fracture ends, it reduces the risk of pressure ulcers, nerve damage and compartment syndrome.

[0020] 2. In this invention, a drug delivery unit is integrated into the modular inflatable assembly. The controller drives the lifting slide rail to move the slider vertically. Combined with an external micro pump, the drug solution is atomized and sprayed out from the nozzle through the inlet pipe and the internal fluid channel of the slider. During the entire drug delivery process, the patient does not need to remove the brace. The slider only moves back and forth 1-2mm above the skin to complete the spraying. This solves the problem of the risk of micro-movement of the fracture ends, severe pain and secondary displacement caused by the repeated removal of the traditional brace when changing the dressing. It is especially suitable for elderly patients with osteoporosis or people with low pain threshold. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a three-dimensional structural diagram of this application.

[0023] Figure 2 This is the rear view of this application.

[0024] Figure 3 This is a three-dimensional structural diagram of the upper arm fixing component and the modular inflatable component of this application.

[0025] Figure 4 This is a rear view of the modular inflatable assembly of this application.

[0026] Figure 5 This is a three-dimensional structural diagram of the modular inflatable component of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Upper arm fixing assembly; 101. Connecting buckle; 102. Compression airbag; 11. Fixing bracket; 12. Tightening strap; 13. Compression pad; 2. Forearm support assembly; 21. Support frame; 22. Connecting strap; 23. Female buckle; 24. Female buckle; 25. Connecting rope; 3. Modular inflation assembly; 31. Control end; 311. Control button; 32. Housing; 33. Liquid inlet pipe; 34. Medication delivery unit; 341. Lifting slide rail; 342. Slider. Detailed Implementation

[0028] 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.

[0029] like Figures 1 to 5 As shown, this embodiment provides a modular inflatable abduction brace for proximal humeral fractures, including an upper arm fixation component 1, a forearm support component 2, and a modular inflatable component 3.

[0030] like Figures 1 to 3 As shown, the upper arm fixation component 1 is used to wrap and fix the upper arm of a patient with a humeral fracture. The upper arm fixation component 1 includes a fixation bracket 11, a tightening strap 12, and a compression pad 13.

[0031] The fixation bracket 11 is designed with an arc-shaped structure, and the side of the fixation bracket 11 has an opening to facilitate the insertion of the patient's arm from the side. In order to achieve lightweight and breathability while ensuring structural strength, the fixation bracket 11 is made of a lightweight plastic material with a microporous structure (such as polyamide or polyetheretherketone). The lower end of the fixation bracket 11 is provided with an inclined bevel, the inclination angle of which matches the natural angle of the human elbow joint when flexed (about 90° to 110°) to avoid compressing the elbow crease. The fixation bracket 11 has a receiving cavity inside to accommodate the upper arm. The diameter of the receiving cavity gradually decreases from top to bottom to conform to the human anatomical shape of the upper arm that gradually tapers from the shoulder to the elbow.

[0032] like Figure 3 As shown, the lower end of the upper arm fixation component 1 is equipped with a connecting buckle 101, which can be used to quickly detach and install with the forearm support component 2. At the same time, the rear side of the upper arm fixation component 1 (i.e., the position corresponding to the posterior humeral muscle group) is provided with an installation groove to accommodate and position the modular inflatable component 3. In addition, two sets of compression airbags 102 are installed on the inner wall of the upper arm fixation component 1.

[0033] like Figure 3 As shown, tightening straps 12 are symmetrically installed on the opening at the front end of the fixation bracket 11. When in use, after the patient puts the upper arm into the receiving cavity, the fixation bracket 11 can be firmly bound to the outside of the upper arm by tying or gluing the two tightening straps 12.

[0034] like Figure 3 As shown, to improve wearing comfort and prevent pressure injuries, pressure pads 13 are installed at both ends of the inner wall of the fixation bracket 11. Two sets of pressure airbags 102 are disposed between the two pressure pads 13 and are located on both sides of the mounting groove. In a preferred embodiment, the pressure pads 13 are multi-layer composite structures: the outer layer is a silver ion antibacterial quick-drying fabric to prevent bacterial growth; the middle layer is a high-elasticity absorbent cotton or medical-grade silicone gel pad to absorb sweat and buffer local pressure; and the bottom layer is a leak-proof isolation layer to prevent liquid from penetrating into the fixation bracket.

[0035] The compression airbag 102 has multiple independent micro-airbags (e.g., a 3×3 array arranged in a matrix) inside. Each independent airbag is connected to a micro-electrically controlled air valve. The surface of the compression airbag 102 is covered with a pressure-relieving liner. The pressure-relieving liner has pressure sensing points (e.g., thin-film pressure sensors) that correspond one-to-one with each independent airbag. This allows the brace to apply differentiated pressure to different areas around the humerus. For example, it can apply greater pressure to the proximal end of the fracture to enhance stability, while applying less pressure to the area where nerves and blood vessels run to prevent compression injury.

[0036] like Figure 1As shown, the forearm support assembly 2 is used to support the patient's forearm and maintain the shoulder joint in an abducted position. The forearm support assembly 2 includes a support frame 21 and a connecting strap 22.

[0037] The upper left end of the support frame 21 is also provided with an inclined bevel to accommodate the physiological curvature of the forearm. The upper end of the support frame 21 is provided with a U-shaped support groove for supporting the forearm. A flexible pad (such as memory foam) is installed on the inner wall of the support groove. Two connecting straps 22 are symmetrically installed on the upper end of the support frame 21. One end of the connecting strap 22 is fixed to one side of the support frame 21, and the other end is adjustablely connected to the other side of the support frame 21 by Velcro, which is used to bind the forearm in the support groove.

[0038] like Figure 1 As shown, in order to achieve dynamic connection between the upper arm fixation component 1 and the forearm support component 2, a female buckle 23 is installed on the outer side wall of the support frame 21, and a connecting rope 25 is installed at the front end of the fixation bracket 11. The end of the connecting rope 25 is connected to the female buckle 23 through a male buckle 24. By adjusting the length of the connecting rope 25 or changing the position of the female buckle 23 of different specifications, the abduction angle of the shoulder joint (e.g., 30°, 45° or 60°) can be set and locked.

[0039] like Figures 1-5 As shown, the modular inflation assembly 3 is detachably installed in the mounting slot on the rear side of the upper arm fixing assembly 1. The modular inflation assembly 3 can realize intelligent inflation and drug delivery. The modular inflation assembly 3 includes a control end 31, a housing 32, a liquid inlet pipe 33, and a drug delivery unit 34.

[0040] A control terminal 31 is fixedly installed at the lower rear end of the fixed bracket 11. A control button 311 is installed on the outer surface of the control terminal 31. The control button 311 includes a power on / off position, a pressurization position, a depressurization position, an up-shift position, and a down-shift position. Specifically, pressing and holding the control button 311 activates the power on / off position, pushing the control button 311 left and right activates the pressurization and depressurization positions, and pushing the control button 311 up and down activates the up-shift and down-shift positions. The control terminal 31 integrates a controller (e.g., a microcontroller STM32 series), a micro air pump, and a rechargeable power supply battery. The control button 311, the air pump, and the power supply battery are all electrically connected to the controller. The gas output end of the air pump is connected to each independent airbag of the compression airbag 102 through a flexible air tube.

[0041] like Figure 4As shown, a housing 32 is installed on the upper end of the control end 31. The inner side of the housing 32 fits tightly with the mounting groove on the rear side of the upper arm fixing assembly 1 to ensure stability after installation. An inlet pipe 33 is installed on the upper side of the outer side of the housing 32. The inlet pipe 33 is used to connect an external medicine storage bag or syringe. A long strip-shaped movable groove is opened on the inner side of the housing 32. A drug delivery unit 34 is installed in the movable groove. The inlet pipe 33 is connected to the drug delivery unit 34 through a channel built into the inside of the housing 32.

[0042] like Figure 5 As shown, the drug application unit 34 includes a lifting slide rail 341 and a slider 342. Vertical lifting slide rails 341 are symmetrically installed on both sides inside the movable groove. A slider 342 that can slide up and down along the slide rail is installed on the lifting slide rail 341. In order to fit the arc-shaped surface of the upper arm, the slider 342 itself is designed as an arc-shaped curved structure (the radius of curvature is consistent with the inner wall curvature of the fixed bracket 11). The slider 342 has a fluid channel inside. One end of the channel is connected to the liquid inlet pipe 33 through a retractable hose, and the other end leads to the concave surface of the slider 342. On the concave surface, multiple spray holes with a diameter of micrometers are evenly opened.

[0043] In the non-working state, the slider 342 retracts into the movable groove, and at this time, the slider 342 does not contact the patient's skin. When medication is needed (e.g., daily dressing changes or periodic spraying of growth factors), the external medication storage bag is connected to the inlet pipe 33 via a micro pump. The micro pump drives the medication through the spray nozzle on the concave surface of the slider 342. The patient or medical staff operates the control button 311 on the control terminal 31, and the controller drives the micro stepper motor built into the lifting slide rail 341. This motor drives the slider 342 to move slowly vertically downward along the movable groove through the lead screw drive. Through the reciprocating motion of the slider 342, the medication is accurately sprayed onto the target wound or dressing area, thus completing a contactless and painless medication application operation, solving the pain point of "removing the dressing when changing it", and realizing drug treatment and painless dressing change.

[0044] The specific steps for using this invention are as follows: S1. Wearing Fixation and Angle Adjustment First, the fixation bracket 11 of the upper arm fixation component 1 is placed on the outside of the patient's upper arm through its side opening, with the mounting groove on the rear side facing upward and backward. The upper arm is then placed into the receiving cavity, which gradually narrows from top to bottom. Initial fixation is achieved using the tightening strap 12 at the front end of the fixation bracket 11, ensuring that the pressure pad 13 on the inner wall conforms to the skin. Next, the patient's forearm is placed in the U-shaped support groove of the forearm support component 2. The tightness is adjusted and fixed using the connecting strap 22. Finally, the connecting rope 25 is connected to the outer wall of the support frame 21 using the female buckle 24 and the female buckle 23. By adjusting the length of the connecting rope 25 or changing the female buckle 23 in different positions, the shoulder joint is locked at the desired therapeutic abduction angle, achieving individualized abduction fixation.

[0045] S2, Modular inflation assembly installation and adaptive pressure adjustment The housing 32 of the modular inflatable component 3 is inserted into the mounting groove on the rear side of the upper arm fixation component 1, ensuring that the inner side of the housing 32 fits tightly with the mounting groove. The control button 311 on the outer side of the control end 31 is pressed and held to start the system. The controller is powered on, and the power supply battery powers the micro air pump. Medical staff can select the pressurization or depressurization command by pushing the control button 311 left and right according to the fracture type and rehabilitation stage. The controller drives the air pump to inflate multiple independent micro airbags inside the compression airbag 102 in a differentiated manner through the flexible air tube. The preset pressure sensing points in the pressure-relieving liner on the surface of the compression airbag 102 monitor the pressure value of each area in real time and feed the data back to the controller. When the pre-set high pressure locking value is reached in the proximal fracture area and the low pressure protection value is reached in the neurovascular area, the controller automatically stops inflation, completing the adaptive and precise pressure distribution fixation.

[0046] S3. Standby and module hiding in non-medication state When the medication application operation is not started, the medication application unit 34 is in a standby retracted state. At this time, the slider 342 is completely retracted into the movable groove on the inner side of the housing 32 under the drive of the lifting slide rail 341. The arc-shaped concave surface of the slider 342 maintains a safe gap of about 5-10mm with the patient's skin. In this state, the inlet pipe 33 is not connected to an external drug source, and the spray hole on the slider 342 is closed or in a non-working position to ensure that there is no accidental drug spraying or mechanical friction during daily activities. The slider 342 does not cause any additional pressure or interference to the affected limb.

[0047] S4, Intelligent Drug Delivery Operation When it is necessary to spray medication onto wounds or dressings near fracture areas, the external medication storage bag is first connected to the inlet pipe 33 via a micro peristaltic pump. By pushing the control button 311 up or down, a descent command is sent to the controller. The controller activates the micro stepper motor built into the lifting slide rail 341. The motor drives the slider 342 to move slowly downward along the vertical movable groove via a lead screw drive. When the slider 342 moves to the preset spraying position, the slide rail movement stops, and then the micro pump is activated. The medication enters the internal fluid channel of the slider 342 through the inlet pipe 33 and the retractable hose, and is finally atomized and sprayed out from multiple micron-sized nozzles evenly distributed on the arc-shaped concave surface, evenly covering the target skin or dressing surface. By pushing the control button 311 up or down, the slider 342 can also be controlled to reciprocate within the movable groove to achieve segmented spraying of longer wounds.

[0048] S5, Recovery Period Maintenance After a single medication administration is completed, the slider 342 is driven to return to the initial contraction position by the upward command, disconnecting the inlet tube 33 from the external drug source. In the mid-to-late stages of rehabilitation, if it is necessary to adjust the fixation pressure or replace the liner, the compression airbag 102 can be completely deflated through the control end 31, the tightening strap 12 and connecting strap 22 can be untied, the upper arm can be removed from the side opening of the fixation bracket 11, and the compression pad 13 or the pressure-relieving liner in the upper arm fixation component 1 can be replaced or cleaned, realizing modular phased rehabilitation management.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A modular inflatable abduction brace for proximal humeral fractures, characterized in that, include: The upper arm fixation component (1) is used to wrap and fix the upper arm with a fracture of the humerus. The lower end of the upper arm fixation component (1) is equipped with a connecting buckle (101). The upper arm fixation component (1) has an installation groove on the rear side. Two sets of compression airbags (102) are installed on the inner wall of the upper arm fixation component (1). Forearm support assembly (2) is used to support the patient's forearm. The forearm support assembly (2) is connected to the upper arm fixation assembly (1) via a connecting buckle (101). A modular inflation assembly (3) is installed on the back of the upper arm fixation assembly (1). The modular inflation assembly (3) is used to inflate the compression airbag (102) and to intelligently administer medication to the patient's upper arm.

2. The modular inflatable abduction brace for proximal humeral fractures according to claim 1, characterized in that: The upper arm fixing assembly (1) includes a fixing bracket (11), a tightening strap (12), and a pressure pad (13). The fixing bracket (11) is an arc-shaped structure with a superior arc shape. The fixing bracket (11) is made of lightweight plastic material with a microporous structure. The lower end of the fixing bracket (11) is provided with an inclined bevel. The tightening strap (12) is symmetrically installed on the opening at the front end of the fixing bracket (11). The fixing bracket (11) has an internal cavity for accommodating the upper arm. The diameter of the cavity gradually decreases from top to bottom. Pressure pads (13) are installed at the upper and lower ends of the inner wall of the fixing bracket (11). Two sets of pressure airbags (102) are arranged between the two pressure pads (13) and are located on both sides of the mounting groove.

3. The modular inflatable abduction brace for proximal humeral fractures according to claim 2, characterized in that: The compression pad (13) is a multi-layer composite structure, with an outer layer of antibacterial and quick-drying fabric, a middle layer of absorbent cotton or gel pad, and a bottom layer of leak-proof isolation layer.

4. The modular inflatable abduction brace for proximal humeral fractures according to claim 3, characterized in that: The compression airbag (102) is equipped with multiple independent airbags inside, each airbag is connected to a micro air valve, and the surface of the compression airbag (102) is provided with a pressure-relieving liner, in which pressure sensing points corresponding to the airbags are preset.

5. A modular inflatable abduction brace for proximal humeral fractures according to claim 4, characterized in that: The forearm support assembly (2) includes a support frame (21) and a connecting belt (22). The upper left end of the support frame (21) is provided with an inclined bevel. The upper end of the support frame (21) is provided with a support groove for supporting the forearm. A flexible pad is installed on the inner wall of the support groove. The connecting belt (22) is symmetrically installed on the upper end of the support frame (21).

6. A modular inflatable abduction brace for proximal humeral fractures according to claim 5, characterized in that: A female buckle (23) is installed on the outer wall of the support frame (21), and a connecting rope (25) is installed at the front end of the fixed bracket (11). The connecting rope (25) is connected to the female buckle (23) through the male buckle (24).

7. A modular inflatable abduction brace for proximal humeral fractures according to claim 6, characterized in that: The modular inflation assembly (3) includes a control terminal (31), a housing (32), an inlet pipe (33), and a drug delivery unit (34). The control terminal (31) is installed at the lower rear end of the fixed bracket (11), and the housing (32) is installed at the upper end of the control terminal (31). The inner side of the housing (32) is in close contact with the mounting groove, and the inlet pipe (33) is installed at the upper end of the outer side of the housing (32). A movable groove is opened on the inner side of the housing (32), and the drug delivery unit (34) is installed on the movable groove. The inlet pipe (33) is connected to the drug delivery unit (34).

8. A modular inflatable abduction brace for proximal humeral fractures according to claim 7, characterized in that: A control button (311) is installed on the outer side of the control terminal (31). The control terminal (31) integrates a controller, an air pump and a power supply battery. The control button (311), the air pump and the power supply battery are electrically connected to the controller. The air pump is connected to the compression airbag (102).

9. A modular inflatable abduction brace for proximal humeral fractures according to claim 8, characterized in that: The drug delivery unit (34) includes a lifting slide rail (341) and a slider (342). The lifting slide rail (341) is symmetrically installed inside the movable groove. The slider (342) is installed on the lifting slide rail (341). The slider (342) has an arc-shaped structure. The slider (342) is connected to the liquid inlet pipe (33) through a hose. Spray holes are evenly opened on the concave surface of the slider (342).

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