An adjustable bracket for shaping a thigh prosthesis receiving cavity and shaping method thereof

Abstract

The invention provides an adjustable support for taking shape of a thigh prosthesis receiving cavity and a shaping method thereof. During shaping, the amputee sits on a saddle-type shaping frame, and the ischium is in force contact with the seat, so that the position of the ischium can be accurately found. An adjustable support is designed to contain the outer surface of the residual limb, and a mixed material of a water-absorbing resin and ceramsite is prepared, and the mixed material is loaded into a rubber sleeve, and then the rubber sleeve containing the mixed material is sleeved on the support. After water is injected into the mixed material, the mixed material foams and expands in the rubber sleeve. During the foaming and expansion process, the gap is first filled, and then the expansion force is pressed toward the residual limb that has been wrapped with a plaster bandage, so that a stable force applied to the plaster negative mold and distributed on demand can be obtained, a plaster inclusion is made outside the adjustable support, the plaster inclusion is fixed in a position where the residual limb is flexed and adducted, and a normal force is applied to the residual limb to simulate the residual limb weighing state, thereby achieving the technical requirements of ischium load-bearing and full contact receiving cavity shaping.

Description

Technical Field

[0001] The invention relates to the technical field of prosthetic limb receiving cavity molding, in particular to an adjustable bracket for prosthetic limb receiving cavity molding of a thigh and a molding method thereof. Background Art

[0002] The socket is the cavity part of the prosthesis that is used to accommodate the force between the residual limb and the prosthesis and connect the residual limb and the prosthesis. The socket is the link between the residual limb and the prosthesis. It mainly supports the body weight, suspends the prosthesis and controls the movement of the prosthesis. It has a direct impact on the comfort, safety and use effect of the prosthesis.

[0003] The design of modern prosthetic sockets is more in line with human anatomy and biomechanics. The thigh prosthesis uses the ischial bone to bear the weight, and the residual limb is in full contact with the closed socket. Therefore, the residual limb has a reasonable load-bearing, comfortable to wear, strong suspension ability, reduced piston movement, and improved prosthetic stability and the ability to control prosthetic movement.

[0004] Since the thigh prosthesis uses the ischium to bear weight, the position of the ischium must be accurately determined when taking the mold; in addition, the residual limb needs to be in a flexed and adducted position in space to ensure stability when standing in the future and lay the foundation for a better gait when walking; the full contact between the residual limb and the closed receiving cavity requires that an evenly distributed force be applied to the plaster negative mold when taking the mold, and a fully contact receiving cavity is formed after the plaster solidifies; when taking the mold, the standing weight-bearing state is simulated, the ischium, muscles and tendons are stressed, and the residual limb and the receiving cavity are in a good contact state.

[0005] At present, manual shaping is often used when taking plaster negative molds. The operator only has one pair of hands and cannot meet the above four requirements. When the hand is used to find the position of the ischium, the position of the flexion and adduction of the residual limb will be ignored; in addition, the plaster solidification requires a certain amount of time. During this period, the hand of the shaping technician cannot always apply a stable force, resulting in an error between the plaster negative mold and the residual limb. When the manual shaping is used, the residual limb is in a suspended state, and it is impossible to simulate the residual limb weighing state and the fit between the residual limb and the plaster negative mold. In this way, the manual shaping can only find a state as close to the ideal state as possible. The shaping quality depends on the experience of the shaping technician, and there are certain technical bottlenecks to be solved. In addition, another shaping method is to use a shaping frame, which can simulate the residual limb weighing state, but because the shaping frame cannot adapt to the individual differences in human anatomy, it is not effective in finding the position of the ischium and controlling the flexion and adduction of the residual limb. The shaping frame is more suitable for lower leg prostheses. Summary of the invention

[0006] The invention provides an adjustable bracket for shaping a thigh prosthesis receiving cavity and a shaping method thereof, which simulates the weighing state of a residual limb and realizes shaping of the receiving cavity with full contact with the ischium and load-bearing.

[0007] The technical solution adopted by the present invention to solve the above technical problems is:

[0008] An adjustable support for shaping a thigh prosthesis receiving cavity, comprising a lifting platform, a base fixed on the lifting platform, and a curved circular tube vertically arranged on the base;

[0009] The base is a circular base, with a sink and a silicone pad placed on the upper end, a water inlet at the lower end, and a plurality of water outlets connected to the water inlet on the side wall;

[0010] One end of the curved circular tube is connected to the water outlet, and the other end extends upward and has a certain height. Multiple components of water discharging mechanisms are evenly spaced on the wall of the curved circular tube.

[0011] It also includes a latex sleeve with a size matching the curved circular tube, and the latex sleeve is sleeved on the outer wall of the curved circular tube.

[0012] Furthermore, there are 16 water outlets; correspondingly, there are 16 curved circular tubes, one end connected to the water outlet is the bottom of the curved circular tube, and the other end is the top of the curved circular tube, and the top water outlet of the curved circular tube is equipped with a 1.6mm plug.

[0013] Furthermore, the curved circular tube is made of red copper with an outer diameter of 6 mm and a wall thickness of 1 mm.

[0014] Furthermore, the wall of each curved circular tube is provided with 5 groups of water discharging mechanisms at intervals of 100 mm above and below, and each group of water discharging mechanisms is provided with 4 water outlet holes along the periphery of the tube wall.

[0015] Furthermore, the aperture sizes of the water outlets of the water discharging mechanisms of each component are 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, and 1.6 mm from bottom to top.

[0016] Furthermore, a 2 mm wide annular band is provided at the upper end of the curved circular tube.

[0017] A method for obtaining a prosthetic thigh socket shape comprises the following steps:

[0018] Step S1. Bracket assembly and curved tube numbering: An elastic pad is installed on the upper end of the base, and the water outlets on the side walls of the base are connected to the curved tubes, and the curved tubes are numbered in the order of 1, 2, 3 ... 16;

[0019] Step S2. Fixing the bracket and adjusting the round tube: Fix the assembled bracket on the lifting platform and put it on the residual limb, compare the shape of the residual limb, and adapt the length and curvature of the curved round tube one by one according to the number;

[0020] Step S3. Filling and fixing materials: Hang the adjusted curved tube upside down, and place the latex sleeve filled with self-expanding material on the curved tube, and fasten the latex sleeve at the ring belt at the end of the curved tube with a cable tie;

[0021] Step S4. Bracket verification: The amputee stands upright and the assembled bracket is verified, requiring the bracket to be well covered on the outside of the residual limb;

[0022] Step S5. Making a plaster inclusion and a plaster mold:

[0023] Step S5-1. Making a plaster inclusion: Put an elastic sock on the bracket, tie both ends, and wrap the wetted plaster bandage around the sock, leaving space for the water inlet; after the plaster bandage solidifies, untie the sock on the side opposite to the water inlet, cut off the excess sock along the edge of the curved tube of the bracket, and complete the making of a plaster inclusion;

[0024] Step S5-2. Making a plaster mold: According to the outer diameter of the plaster inclusion, select a plastic barrel with an inner diameter slightly larger than the outer diameter of the plaster inclusion; open a 10mm diameter circular hole in the center of the bottom of the plastic barrel, and pass a 10mm diameter rubber tube through the circular hole; seal the contact between the rubber tube and the plastic barrel;

[0025] Step S6. Hoisting the bracket, plaster mold and fixing the plaster inclusion: hoist the bracket and the plaster mold, use a laser alignment instrument to calibrate the frontal plane and sagittal plane and make a lead mark of the vertical line, insert one end of the rubber tube passing through the plastic bucket into the curved round tube of the bracket base; put the plastic bucket on the lifting platform, move it to the bottom of the bracket and the plaster mold, use a laser alignment instrument to align the laser line with the vertical lines marked on the frontal plane and sagittal plane on the plaster inclusion and fix the plaster inclusion;

[0026] Step S7. Prepare the gypsum slurry and pour it into a plastic bucket, raise the lifting platform, immerse the gypsum inclusion in the plastic bucket, and adjust the rubber tube to prevent it from winding and knotting; the gypsum slurry solidifies, and the gypsum inclusion is in a suitable spatial position;

[0027] Step S8. Taking the shape of the receiving cavity and making a negative plaster mold of the receiving cavity:

[0028] The amputee stands upright, first mark the bony landmarks, measure and record the relevant data, soak the plaster bandage with 20 degrees Celsius water, wrap the plaster bandage around the residual limb, put on the nylon socks, put the residual limb into the prepared plaster wrap, turn the nylon socks inside out and wrap them around the outer edge of the plastic bucket, and tighten them with a band to prevent them from loosening. At this time, a closed space is formed;

[0029] Let the amputee sit on a saddle-type prosthesis-taking frame, connect the rubber tube from the plastic bucket to the outlet of a micro-electric water pump, turn on the water pump switch, and water will be injected into the latex sleeve through the water channel and the curved copper tube. The self-expanding material in the latex sleeve will expand when it meets water, and expand around, first filling the gap between the tubes, and then squeezing towards the residual limb; when the patient feels that the squeezing force is appropriate, stop the water supply, and at the same time, the operator should observe the amount of upward bulge of the socks to indirectly judge the force situation;

[0030] The ischium bears weight on the saddle-type molding frame, and the position of the ischium is clear; the residual limb is covered with an expanded latex sleeve, and the height of the lifting platform is appropriately increased to allow the end of the residual limb to be slightly stressed, simulating the stress conditions during standing; the operator observes the contact between the ischium and the saddle-type molding frame, controls the adductor tendon and the molding of the perineum with one hand, and controls the molding of the greater trochanter with the other hand; after the plaster solidifies, the saddle-type molding frame is taken out, and the lifting platform, plastic bucket and bracket are removed to obtain a plaster negative mold of the receiving cavity.

[0031] Furthermore, in step S2, the adjustment method of the curved circular tube is: according to the length of the residual limb, the length of the curved circular tube is cut in sequence with a tube cutter; then according to the shape of the residual limb, the curvature of the curved circular tube is adjusted: a blowtorch is used to heat the adjustment area of ​​the curved circular tube that needs to be adjusted, so that the curved circular tube is 8 mm away from the residual limb, and finally a plug is plugged.

[0032] Furthermore, in step S3, the self-expanding material is a uniform mixture of water-absorbing resin and ceramsite; wherein the diameter of the ceramsite is 6 mm, and the mixing ratio of the water-absorbing resin to the ceramsite is 6:4.

[0033] Furthermore, in step S5-2, vaseline is applied to seal the contact between the rubber tube and the plastic barrel.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] A saddle-type molding frame is selected. When the amputee sits on it during molding, the ischium is in contact with the seat under force, so the ischium position can be found accurately; an adjustable bracket is designed to contain the outer surface of the residual limb, and a mixed material of water-absorbing resin and ceramsite is prepared (the ratio of water-absorbing resin to ceramsite can adjust the expansion force that can be generated after water injection), and the mixed material is put into a rubber sleeve, and then the rubber sleeve containing the mixed material is put on the water pipes arranged around the adjustable bracket, and the rubber sleeve mouth is tied tightly. When water is injected into it, the mixed material foams and expands in the rubber sleeve. During the foaming and expansion process, the gap is filled first, and then the expansion force is pressed against the residual limb that has been wrapped with a plaster bandage, so that a stable force distributed on demand can be obtained on the plaster negative mold; a plaster inclusion is made outside the adjustable bracket, and the plaster inclusion is fixed in the position of flexion and adduction of the residual limb, and a normal force is applied to the residual limb to simulate the residual limb weighing state, so as to achieve the technical requirements of ischium load-bearing and full contact with the receiving cavity molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is the main view of the base;

[0037] Figure 2 A three-dimensional diagram of the base;

[0038] Figure 3 is a top view of the base;

[0039] Figure 4 A front view of an adjustable bracket for shaping a thigh prosthesis socket;

[0040] Figure 5 A stereoscopic view of an adjustable bracket for shaping a thigh prosthesis socket;

[0041] Figure 6 A top view of an adjustable bracket for shaping a thigh prosthesis socket;

[0042] Figure 7 It is a schematic diagram of a latex condom being arranged outside a curved circular tube and a bracket being hung upside down;

[0043] Figure 8 This is a schematic diagram of the bracket inspection;

[0044] Fig. 9 The relative position relationship between the suspension bracket, plaster mold and plastic bucket Figure 1 ;

[0045] Fig.10 The relative position relationship between the suspension bracket, plaster mold and plastic bucket Figure 2 ;

[0046] Fig.11 Illustration of the operation of taking out the plaster negative mold Figure 1 ;

[0047] Fig.12 Illustration of the operation of taking out the plaster negative mold Figure 2 ;

[0048] Fig.13 It is the assembly relationship diagram of the components of the molding device (enlarged view);

[0049] In the figure, 1. base, 2. water inlet, 3. water outlet, 4. sink, 5. curved circular tube, 6. water outlet, 7. silicone pad, 8. latex sleeve, 9. special props for suspension, 10. plumb line in the frontal plane, 11. bracket and plaster mold, 12. plumb line in the frontal plane and the direction line of the femur of the residual limb, 13. plastic bucket, 14. rubber tube, 15. plumb line in the sagittal plane, 16. plumb line in the sagittal plane and the direction line of the femur of the residual limb, 17. lifting platform, 18. saddle-type molding frame, 19. elastic stocking, 20. hoop, 21. solidified plaster. DETAILED DESCRIPTION

[0050] For examples, please refer to the attached Figure 1-7 , an adjustable bracket for shaping a thigh prosthesis receiving cavity, comprising a lift 17, a base 1 fixed on the lift 17, and a curved circular tube 5 vertically arranged on the base 1; the base 1 is a circular base, a sinking platform 4 is arranged at the upper end and a silicone pad 7 is placed on it, a water inlet 2 is arranged at the lower end, and a plurality of water outlets 3 connected with the water inlet 2 are arranged on the side wall; one end of the curved circular tube 5 is connected to the water outlet 3, and the other end extends upward and has a certain height, and a plurality of water discharging mechanisms are evenly spaced on the tube wall of the curved circular tube 5; it also includes a latex sleeve 8 whose size is compatible with the curved circular tube 5, and the latex sleeve 8 is sleeved on the outer wall of the curved circular tube 5.

[0051] In the above structure, 16 water outlets 3 are provided; correspondingly, 16 curved circular tubes 5 are provided, one end connected to the water outlet 3 is the bottom of the curved circular tube 5, and the other end is the top of the curved circular tube 5, and the water outlet at the top of the curved circular tube is equipped with a 1.6mm plug; the upper end of the curved circular tube is provided with a 2mm wide ring band.

[0052] It should be noted that the curved circular tube 5 is made of copper, with an outer diameter of 6 mm and a wall thickness of 1 mm. The wall of each curved circular tube 5 is provided with 5 components of water discharging mechanisms at intervals of 100 mm, and each component of the water discharging mechanism is provided with 4 water outlet holes 6 along the periphery of the wall. The aperture sizes of the water outlets of each component of the water discharging mechanism are 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, and 1.6 mm from bottom to top.

[0053] A method for obtaining a prosthetic thigh socket shape comprises the following steps:

[0054] Step S1. Bracket assembly and curved tube numbering: A silicone pad 7 is installed on the sink 4 at the upper end of the base 1, and the water outlets 3 on the side walls of the base 1 are connected to the curved tubes 5 respectively, and the curved tubes 5 are numbered in the order of 1, 2, 3...16.

[0055] Step S2. Fixing the bracket and adjusting the round tube: Fix the assembled bracket on the lifting platform 17 and put it on the residual limb. Compare the shape of the residual limb and adapt the length and curvature of the curved round tube 5 one by one according to the number.

[0056] Step S3. Material filling and fixing (such as Figure 7 As shown): the mixed self-expanding material is loaded into the latex sleeve 8 for standby use; the adjusted curved circular tube 5 is hung upside down, and the latex sleeve 8 filled with the self-expanding material is sleeved on the curved circular tube 5, and the latex sleeve 8 is tightened at the ring belt at the end of the curved circular tube 5 with a cable tie.

[0057] Step S4. Bracket verification (eg Figure 8 As shown): The amputee stands upright and checks the assembled bracket, which is required to cover the outside of the residual limb well.

[0058] Step S5. Making a plaster inclusion and a plaster mold:

[0059] Step S5-1. Make a plaster inclusion: put an elastic sock 19 on the bracket, tie the two ends, and wrap the wetted plaster bandage around the elastic sock 19, leaving space for the water inlet 2; after the plaster bandage solidifies, untie the elastic sock 19 on the side opposite to the water inlet 2, cut off the excess elastic sock 19 along the edge of the curved circular tube 5 of the bracket, and complete the production of a plaster inclusion.

[0060] Step S5-2. Making a plaster mold: According to the outer diameter of the plaster inclusion, select a plastic barrel 13 whose inner diameter is slightly larger than the outer diameter of the plaster inclusion; open a circular hole with a diameter of 10 mm in the center of the bottom of the plastic barrel 13, and pass a rubber tube 14 with a diameter of 10 mm through the circular hole; apply vaseline to the contact between the rubber tube 14 and the plastic barrel 13 to seal it.

[0061] Step S6. Install the bracket, plaster mold and fix the plaster inclusion (such as Figure 9-10As shown): The bracket and the plaster mold 11 are hoisted using the special hanging tool 9, and the laser alignment instrument is used to calibrate the frontal plane and the sagittal plane and make plumb markings of vertical lines (in the figure, 10 is the plumb line in the frontal plane, 12 is the plumb line in the frontal plane and the femoral direction line of the residual limb, 15 is the plumb line in the sagittal plane, and 16 is the plumb line in the sagittal plane and the femoral direction line of the residual limb), and one end of the rubber tube 14 passing through the plastic barrel 13 is inserted into the curved circular tube 5 of the bracket base; the plastic barrel 13 is placed on the lifting platform 17, and moved to the bottom of the bracket and the plaster mold 11, and the laser alignment instrument is used to align the laser line with the vertical lines in the frontal plane and the sagittal plane that have been marked on the plaster inclusion, and the plaster inclusion is fixed with the special hanging tool 9.

[0062] Step S7. Prepare the gypsum slurry and pour it into the plastic barrel 13, raise the lifting platform 17, immerse the gypsum inclusion body in the plastic barrel 13, and adjust the rubber tube 14 to prevent it from winding and knotting; the gypsum slurry solidifies, and the gypsum inclusion body is in a suitable spatial position.

[0063] Step S8. Taking the shape of the receiving cavity and making a negative plaster mold of the receiving cavity:

[0064] The amputee stands upright, first mark the bony landmarks, measure and record the relevant data, soak the plaster bandage with 20°C water, wrap the plaster bandage around the residual limb, and then put on the elastic stocking19 (such as Figure 11-13 As shown), the residual limb is placed in the prepared plaster inclusion (the plastic barrel 13 contains the plaster inclusion), the elastic sock 19 is turned outward and wrapped around the outer edge of the plastic barrel 13, and is fastened with a hoop 20 to prevent loosening, thereby forming a closed space.

[0065] The amputee is asked to sit on a saddle-type molding frame 18, and the rubber tube 14 led out of the plastic barrel 13 is connected to the water outlet of a miniature electric water pump. The water pump switch is turned on, and water is injected into the latex sleeve 8 through the curved copper tube 5 through the waterway. The self-expanding material in the latex sleeve 8 expands when it meets water, expands all around, first fills the gap between the tubes, and then squeezes toward the residual limb; when the patient feels that the squeezing force is appropriate, the water intake is stopped, and the operator should observe the amount of upward bulge of the elastic stocking 19 to indirectly judge the force situation.

[0066] The ischium bears the weight on the saddle-type molding frame 18, and the position of the ischium is clear; the residual limb is covered with the expanded latex sleeve 8, and the height of the lifting platform 17 is appropriately increased to make the end of the residual limb slightly stressed, simulating the stress situation during standing; the operator observes the contact between the ischium and the saddle-type molding frame 18, controls the adductor tendon and the molding of the perineum side with one hand, and controls the molding of the greater trochanter with the other hand; after the plaster solidifies, the saddle-type molding frame 18 is taken out, and the lifting platform 17, the plastic bucket 13 and the bracket are removed to obtain the plaster negative mold of the receiving cavity.

[0067] It should be noted that in step S2, the adjustment method of the curved circular tube 5 is: according to the length of the residual limb, the length of the curved circular tube 5 is cut in sequence with a tube cutter; then according to the shape of the residual limb, the curvature of the curved circular tube 5 is adjusted: a blowtorch is used to heat the adjustment area of ​​the curved circular tube 5 that needs to be adjusted, so that the curved circular tube 5 is 8 mm away from the residual limb, and finally a plug is plugged.

[0068] It should be noted that in step S3, the self-expanding material is a uniform mixture of water-absorbing resin and ceramsite; wherein the diameter of the ceramsite is 6 mm, and the mixing ratio of the water-absorbing resin to the ceramsite is 6:4.

[0069] It should be noted that Fig.13 This is the assembly relationship diagram of the various components of the molding device.

[0070] The molding method proposed this time uses a saddle-type molding frame. When the amputee sits on it during molding, the ischium is in contact with the seat under force, so the position of the ischium can be accurately found; an adjustable bracket is designed, which covers the outer surface of the residual limb, and a mixed material of water-absorbent resin and expanded clay is prepared (the ratio of water-absorbent resin to expanded clay can adjust the size of the expansion force that can be generated after water injection), and this mixed material is loaded into a rubber sleeve, and then the rubber sleeve containing the mixed material is put on the water pipes arranged around the adjustable bracket, and the mouth of the rubber sleeve is tied tightly. When water is injected into it, the mixed material foams and expands in the rubber sleeve. During the foaming and expansion process, the gap is filled first, and then the expansion force is pressed against the residual limb that has been wrapped with a plaster bandage, so that a stable force applied to the plaster negative mold and distributed on demand can be obtained; a plaster inclusion body is made outside the adjustable bracket, and the plaster inclusion body is fixed in a flexed and adducted position of the residual limb, and a normal force is applied to the residual limb to simulate the weighing state of the residual limb, thereby achieving the technical requirements of ischial load-bearing and full contact with the receiving cavity.

[0071] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and details may be made without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A method for shaping a thigh prosthesis receiving cavity, comprising an adjustable bracket for shaping a thigh prosthesis receiving cavity, the adjustable bracket comprising a lifting platform, a base fixed on the lifting platform, and a curved circular tube vertically arranged on the base; The base is a circular base, with a sink at the upper end, a water inlet at the lower end, and a plurality of water outlets connected to the water inlet on the side wall; One end of the curved circular tube is connected to the water outlet, and the other end extends upward and has a certain height. Multiple components of water discharging mechanisms are evenly spaced on the wall of the curved circular tube. Also included is a latex sleeve with a size matching the curved circular tube, wherein the latex sleeve is sleeved on the outer wall of the curved circular tube; There are 16 water outlets; correspondingly, there are 16 curved circular tubes, one end connected to the water outlet is the bottom of the curved circular tube, and the other end is the top of the curved circular tube. The top water outlet of the curved circular tube is equipped with a 1.6mm plug; The curved round tube is made of copper, with an outer diameter of 6 mm and a wall thickness of 1 mm; The wall of each curved circular tube is provided with 5 groups of water discharging mechanisms at intervals of 100 mm, and each group of water discharging mechanisms is provided with 4 water outlet holes along the periphery of the wall; The aperture sizes of the water outlets of the water discharging mechanisms of each component are 0.8mm, 1.0mm, 1.2mm, 1.4mm, and 1.6mm from bottom to top; The upper end of the curved circular tube is provided with a 2 mm wide annular band; It is characterized in that The molding method comprises the following steps: Step S1. Assembling the base and the curved circular tube and numbering the curved circular tube: an elastic pad is installed on the upper end of the base, and the water outlets on the side walls of the base are respectively connected to the curved circular tubes, and the curved circular tubes are numbered in the order of 1 to 16; Step S2. Fixing the base and adjusting the round tube: Fix the assembled base on the lifting platform and put it on the residual limb, compare the shape of the residual limb, and adapt the length and curvature of the curved round tube one by one according to the number; Step S3. Filling and fixing materials: Hang the adjusted curved tube upside down, and place the latex sleeve filled with self-expanding material on the curved tube, and fasten the latex sleeve at the ring belt at the end of the curved tube with a cable tie; Step S4. Verification of the base and the curved circular tube: The amputee stands upright and the assembled base and the curved circular tube are verified, requiring the base and the curved circular tube to be well covered on the outside of the residual limb; Step S5. Making a plaster inclusion and a plaster mold: Step S5-1. Make a plaster inclusion: Put an elastic sock on the base and the curved tube, tie the two ends, and wrap the wetted plaster bandage around the sock, leaving a space for the water inlet; after the plaster bandage solidifies, untie the sock on the side opposite to the water inlet, cut off the excess sock along the edge of the curved tube of the bracket, and complete the production of a plaster inclusion; Step S5-2. Making a plaster mold: According to the outer diameter of the plaster inclusion, select a plastic barrel with an inner diameter slightly larger than the outer diameter of the plaster inclusion; open a 10mm diameter circular hole in the center of the bottom of the plastic barrel, and pass a 10mm diameter rubber tube through the circular hole; seal the contact between the rubber tube and the plastic barrel; Step S6. Hoist the base, the curved circular tube, and the plaster mold, and fix the plaster inclusion: hoist the base, the curved circular tube, and the plaster mold, use a laser alignment instrument to calibrate the frontal plane and the sagittal plane, and make a lead mark of the vertical line, and insert one end of the rubber tube passing through the plastic bucket into the water inlet of the base; put the plastic bucket on the lifting platform, move it to the bottom of the base and the plaster mold, use a laser alignment instrument to align the laser line with the vertical lines marked on the frontal plane and the sagittal plane on the plaster inclusion, and fix the plaster inclusion; Step S7. Prepare the gypsum slurry and pour it into a plastic bucket, raise the lifting platform, immerse the gypsum inclusion in the plastic bucket, and adjust the rubber tube to prevent it from winding and knotting; the gypsum slurry solidifies, and the gypsum inclusion is in a suitable spatial position; Step S8. Taking the shape of the receiving cavity and making a negative plaster mold of the receiving cavity: The amputee stands upright, first mark the bony landmarks, measure and record the relevant data, soak the plaster bandage with 20 degrees Celsius water, wrap the plaster bandage around the residual limb, put on the nylon socks, put the residual limb into the prepared plaster wrap, turn the nylon socks inside out and wrap them around the outer edge of the plastic bucket, and tighten them with a band to prevent them from loosening. At this time, a closed space is formed; Let the amputee sit on a saddle-type prosthesis-taking frame, connect the rubber tube from the plastic bucket to the outlet of a micro-electric water pump, turn on the water pump switch, and water will be injected into the latex sleeve through the water channel and the curved copper tube. The self-expanding material in the latex sleeve will expand when it meets water, and expand around, first filling the gap between the tubes, and then squeezing towards the residual limb; when the patient feels that the squeezing force is appropriate, stop the water supply, and at the same time, the operator should observe the amount of upward bulge of the socks to indirectly judge the force situation; The ischium bears weight on the saddle-type molding frame, and the position of the ischium is clear; the residual limb is covered with an expanded latex sleeve, and the height of the lifting platform is appropriately increased to allow the end of the residual limb to be slightly stressed, simulating the stress conditions during standing; the operator observes the contact between the ischium and the saddle-type molding frame, controls the adductor tendon and the molding of the perineum with one hand, and controls the molding of the greater trochanter with the other hand; after the plaster solidifies, the saddle-type molding frame is taken out, and the lifting platform, plastic bucket, base and curved circular tube are removed to obtain a plaster negative mold of the receiving cavity.

2. A method for shaping a thigh prosthesis socket according to claim 1, characterized in that: In step S2, the method for adjusting the curved circular tube is: according to the length of the residual limb, the length of the curved circular tube is cut in sequence with a tube cutter; then according to the shape of the residual limb, the curvature of the curved circular tube is adjusted: a blowtorch is used to heat the adjustment area of ​​the curved circular tube that needs to be adjusted, so that the curved circular tube is 8 mm away from the residual limb, and finally a plug is plugged.

3. A method for shaping a thigh prosthesis socket according to claim 1, characterized in that: In the step S3, the self-expanding material is a uniform mixture of water-absorbing resin and ceramsite; wherein the diameter of the ceramsite is 6 mm, and the mixing ratio of the water-absorbing resin to the ceramsite is 6:

4.

4. A method for shaping a thigh prosthesis socket according to claim 1, characterized in that: In step S5-2, vaseline is applied to seal the contact between the rubber tube and the plastic barrel.

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