Portable sleeve type plantar vein pump

Abstract

The invention discloses a portable sleeve type plantar vein pump which comprises a sole part, an upper part and a shank supporting part integrated with the upper part, an instep supporting part is arranged on one side of a shank connecting part, and air bag pressurizing mechanisms used for independent control are arranged in the sole part, the instep supporting part and the shank supporting part; the air bag pressurizing mechanism comprises a plantar air bag structure, a shank air bag and an instep air bag, the plantar air bag structure, the shank air bag and the instep air bag are connected with a micro air pump, and a control module is further arranged on one side of the shank supporting part; the control module is used for controlling the air conveying amount of the micro air pump to the plantar air bag structure, the shank air bag and the instep air bag, and fixing mechanisms are arranged on the upper part and the shank supporting part correspondingly, all areas of the foot and the shank can be independently pressurized and relaxed, and the venous thrombosis prevention effect is improved; the device can be automatically fixed to the foot of a patient, and fixing operation is convenient and fast.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of medical devices, and particularly relates to a portable sleeve type plantar venous pump. BACKGROUND

[0002] Short-term and long-term bedridden patients caused by trauma, surgery, cerebral thrombosis, paralysis and other reasons will lead to the risk of venous thrombosis (VTE), and if not actively prevented, may further form deep venous thrombosis (DVT) and even pulmonary embolism (PE), ultimately endangering life. The prevention measures of VTE include basic prevention, physical prevention and drug prevention. According to the risk level, the plantar venous pump as an effective means of physical prevention is widely used in clinical practice, which can also increase substantial benefits for clinical practice.

[0003] The application disclosed in the patent with the publication number CN111374877A discloses a foot venous thrombosis prevention and treatment device and a control method thereof, which comprises a foot binding bag, a pressurizing device, a gas path connecting pipe, a heating device, an external power cord and a prevention and treatment instrument. The control method contains three control modes: treatment mode, rehabilitation mode and leisure mode, each mode corresponds to specific parameters. The scheme uses the pressurizing device to deeply pressurize and relax the blood vessels of the human foot, and uses the heating device to strengthen blood circulation. By presetting reasonable pressurizing values, pressurizing frequencies and heating temperatures, the formation of deep venous thrombosis can be effectively avoided and slowed down. The device is easy to wear, reliable in performance, and can be suitable for users of different foot sizes. In particular, the acupoint impact point designed at the plantar surface can effectively improve the user experience.

[0004] However, the above-mentioned scheme cannot independently pressurize and relax the patient's arch, heel, forefoot, dorsal foot and lower leg, cannot pressurize and relax according to the lymph flow, and the prevention of venous thrombosis is not good. At the same time, it cannot automatically wear and lock according to the size of the patient's foot, and is inconvenient to wear. Therefore, we propose a portable sleeve type plantar venous pump. SUMMARY

[0005] The purpose of the present application is to provide a portable sleeve type plantar venous pump to solve the problem that the prior art cannot independently pressurize and relax the patient's arch, heel, forefoot, dorsal foot and lower leg, cannot pressurize and relax according to the lymph flow, and the prevention of venous thrombosis is not good. At the same time, it cannot automatically wear and lock according to the size of the patient's foot, and is inconvenient to wear.

[0006] To achieve the above object, the application provides the following technical scheme: a portable sleeve type foot bottom vein pump, comprising a shoe sole part, a shoe upper part and a calf supporting part integrated with the shoe upper part, one side of the calf supporting part is connected with a calf connecting part through a hinge, one side of the calf connecting part is provided with a instep supporting part, the shoe sole part, the instep supporting part and the calf supporting part are provided with air bag pressurizing mechanisms for independent control;

[0007] The air bag pressurizing mechanism comprises a foot bottom air bag structure, a calf air bag and a instep air bag, the foot bottom air bag structure is arranged on the shoe sole part, the calf air bag is arranged on the inner surface of the calf supporting part, the instep air bag is arranged on the inner surface of the instep supporting part, the foot bottom air bag structure, the calf air bag and the instep air bag are connected with a micro air pump, one side of the calf supporting part is further provided with a control module, and the control module is used for controlling the air supply amount of the micro air pump to the foot bottom air bag structure, the calf air bag and the instep air bag.

[0008] The shoe upper part and the calf supporting part are provided with fixing mechanisms for automatically locking the instep supporting part.

[0009] Preferably, the foot bottom air bag structure comprises a forefoot air bag, an arch air bag and a heel air bag, the forefoot air bag, the arch air bag and the heel air bag are arranged in sequence on one side surface of the shoe sole part, the forefoot air bag, the arch air bag and the heel air bag are connected with a main air supply pipe, the main air supply pipe is arranged in the shoe sole part, and the main air supply pipe is connected with the micro air pump, the micro air pump is arranged on the lower side of the shoe sole part, and can deliver air flow into the forefoot air bag, the arch air bag and the heel air bag.

[0010] Preferably, the forefoot air bag is connected with the main air supply pipe through a first air supply hose, the arch air bag is connected with the main air supply pipe through a second air supply hose, the heel air bag is connected with the main air supply pipe through a third air supply hose, a first electromagnetic valve is arranged on the first air supply pipe, a second electromagnetic valve is arranged on the second air supply hose, and a third electromagnetic valve is arranged on the third air supply hose, so that the inflation pressure in the forefoot air bag, the arch air bag and the heel air bag can be independently controlled.

[0011] Preferably, the calf air bag is connected with the main air supply pipe through a fourth air supply hose, and a fourth electromagnetic valve is arranged on the fourth air supply hose, so that the inflation pressure in the calf air bag can be controlled.

[0012] Preferably, the instep air bag is connected with the main air supply pipe through a fifth air supply hose, and a fifth electromagnetic valve is arranged on the fifth air supply hose, so that the inflation pressure in the instep air bag can be controlled.

[0013] Preferably, the forefoot patch piezoelectric pressure sensor is arranged on the outer surface of the forefoot air bag, the arch patch piezoelectric pressure sensor is arranged on the outer surface of the arch air bag, the heel patch piezoelectric pressure sensor is arranged on the outer surface of the heel air bag, and the forefoot patch piezoelectric pressure sensor, the arch patch piezoelectric pressure sensor and the heel patch piezoelectric pressure sensor are connected with the control chip in the control module, so as to monitor the pressure of the forefoot area, the arch area and the heel area in real time.

[0014] Preferably, the leg patch piezoelectric pressure sensor is arranged on the outer surface of the calf air bag, and the foot dorsum patch piezoelectric pressure sensor is arranged on the outer surface of the foot dorsum air bag, and the leg patch piezoelectric pressure sensor and the foot dorsum patch piezoelectric pressure sensor are connected with the control chip, so as to monitor the pressure of the calf area and the foot dorsum area in real time.

[0015] Preferably, the pressure control of the control chip is specifically controlled as follows:

[0016] Step one, calculate the total effective contact area of multiple areas, and the calculation equation is as follows:

[0017] S _total =S1+S2×0.6+S3+S4×K4+S5×K5;

[0018] In the formula, S1 is the effective contact area of the heel area, S2 is the effective contact area of the arch area, S3 is the effective contact area of the forefoot area, S4 is the effective contact area of the foot dorsum area, S5 is the effective contact area of the calf area, K4 is the effective pressure coefficient of the foot dorsum area, and K5 is the calf muscle thickness correction coefficient.

[0019] Step two, gradient calculation of the basic pressure according to the total effective contact area, and the calculation equation is as follows:

[0020] P _base =(K1×W1+K4×W4+K5×W5) / S _total ;

[0021] In the formula, W1 is the weight of the foot bottom area, W4 is the weight of the foot dorsum area, W5 is the weight of the calf area, and K1 is the effective pressure coefficient of the foot bottom area.

[0022] Step three, calculate the pressure correction, and the equation is as follows:

[0023] P _target =P _base ×K _age ×K _edema ×K _dorsal ×K _calf ;

[0024] In the formula, K _age is the age correction coefficient; K_edema K is a swelling correction coefficient, K _dorsal K is a dorsum of foot state correction coefficient; K _calf K is a calf muscle tension correction coefficient.

[0025] Preferably, the fixing mechanism comprises a flexible rack arranged on one side surface of the calf connecting part and the instep supporting part, the flexible rack corresponds to a locking seat, the locking seat is arranged on one side of the upper part and the calf supporting part, a driving shaft is rotatably arranged in the locking seat, a gear is arranged on the driving shaft, the gear corresponds to the flexible rack, and the tightness of the flexible rack can be adjusted.

[0026] Preferably, the driving shaft is connected with an output shaft of a driving motor, the driving motor is arranged in the locking seat, and the driving motor is connected with a control chip, so that the device can be automatically fixed on the foot position of a patient.

[0027] Compared with the prior art, the device has the following beneficial effects:

[0028] (1) The device can independently control the inflation pressure in the plantar air bag structure, the calf air bag and the dorsum of foot air bag according to the contact area of each region of the foot and the calf of a patient, thereby independently pressurizing and relaxing each region of the foot and the calf, and improving the venous thrombosis prevention effect.

[0029] (2) The device can automatically adjust the wearing pressure according to the shape and size of the foot of a patient, thereby automatically fixing the device on the foot of the patient, conveniently fixing the device, and not causing pressure injury of the foot of the patient. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic view of a split structure of the device;

[0031] Figure 2 is a schematic view of the structure of the device in use;

[0032] Figure 3 is a schematic view of the structure of the sole part in the device;

[0033] Figure 4 is a schematic view of the structure of the instep supporting part in the device;

[0034] Figure 5 is a schematic view of the half-section structure of the instep supporting part in the device;

[0035] Figure 6 is a schematic view of the half-section structure of the instep supporting part in the device; Figure 5 is a schematic view of the half-section structure of the instep supporting part in the device;

[0036] Figure 7It is a structure schematic view of the air bag pressurizing mechanism in the application.

[0037] Figure 8 It is a structure schematic view of the fixing mechanism in the application.

[0038] In the figure: 1, air bag pressurizing mechanism; 2, control module; 3, fixing mechanism; 4, battery pack; 5, upper part; 6, micro air pump; 7, sole part; 8, fixing band; 9, instep support part; 10, calf connecting part; 11, hinge; 12, calf support part; 31, locking seat; 32, locking port; 33, flexible rack; 34, driving shaft; 35, gear; 36, driving motor; 101, forefoot air bag; 102, forefoot patch piezoelectric pressure sensor; 103, arch piezoelectric pressure sensor; 104, heel piezoelectric pressure sensor; 105, leg piezoelectric pressure sensor; 106, arch air bag; 107, heel air bag; 108, calf air bag; 109, instep air bag; 110, instep piezoelectric pressure sensor; 111, first air hose; 112, first electromagnetic valve; 113, main air hose; 114, second air hose; 115, second electromagnetic valve; 116, third electromagnetic valve; 117, third air hose; 118, fourth air hose; 119, fourth electromagnetic valve; 120, fifth air hose; 121, fifth electromagnetic valve. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0040] Please refer to Figures 1-7 The application provides a technical solution: a portable sleeve type foot bottom vein pump, which comprises a sole part 7, an upper part 5, and a calf support part 12 integrated with the upper part 5. The calf support part 12 is connected to a calf connecting part 10 through a hinge 11 on one side. An instep support part 9 is arranged on one side of the calf connecting part 10. The sole part 7, the instep support part 9, and the calf support part 12 are internally provided with air bag pressurizing mechanisms 1 for independent control.

[0041] The air bag pressurizing mechanism 1 comprises a sole air bag structure, a lower leg air bag 108 and a instep air bag 109, the sole air bag structure is arranged on the shoe sole 7, the lower leg air bag 108 is arranged on the inner surface of the lower leg supporting part 12, the instep air bag 109 is arranged on the inner surface of the instep supporting part 9, the sole air bag structure, the lower leg air bag 108 and the instep air bag 109 are connected with the micro air pump 6, and the control module 2 is further arranged on one side of the lower leg supporting part 12, and the control module 2 is used for controlling the air supply amount of the micro air pump 6 to the sole air bag structure, the lower leg air bag 108 and the instep air bag 109.

[0042] The sole air bag structure comprises a forefoot air bag 101, an arch air bag 106 and a heel air bag 107, the forefoot air bag 101, the arch air bag 106 and the heel air bag 107 are arranged in sequence on the one side surface of the shoe sole 7, the forefoot air bag 101, the arch air bag 106 and the heel air bag 107 are all connected with the main air supply pipe 113, the main air supply pipe 113 is arranged in the shoe sole 7, and the main air supply pipe 113 is connected with the micro air pump 6 on the lower side of the shoe sole 7, so that air flow can be delivered into the forefoot air bag 101, the arch air bag 106 and the heel air bag 107.

[0043] The forefoot air bag 101 is connected with the main air supply pipe 113 through the first air supply hose 111, the arch air bag 106 is connected with the main air supply pipe 113 through the second air supply hose 114, the heel air bag 107 is connected with the main air supply pipe 113 through the third air supply hose 117, the first electromagnetic valve 112 is arranged on the first air supply pipe, the second electromagnetic valve 115 is arranged on the second air supply hose 114, the third electromagnetic valve 116 is arranged on the third air supply hose 117, so that the inflation pressure in the forefoot air bag 101, the arch air bag 106 and the heel air bag 107 can be independently controlled; the lower leg air bag 108 is connected with the main air supply pipe 113 through the fourth air supply hose 118, the fourth electromagnetic valve 119 is arranged on the fourth air supply hose 118, so that the inflation pressure in the lower leg air bag 108 can be controlled; the instep air bag 109 is connected with the main air supply pipe 113 through the fifth air supply hose 120, the fifth electromagnetic valve 121 is arranged on the fifth air supply hose 120, so that the inflation pressure in the instep air bag can be controlled, and specifically, the first electromagnetic valve 112, the second electromagnetic valve 115, the third electromagnetic valve 116, the fourth electromagnetic valve 119 and the fifth electromagnetic valve 121 are all connected with the control chip, and the control chip is further connected with the micro air pump 6.

[0044] The front palm patch piezoelectric pressure sensor 102 is arranged on the outer surface of the front palm air bag 101, the arch patch piezoelectric pressure sensor 103 is arranged on the outer surface of the arch air bag 106, the heel patch piezoelectric pressure sensor 104 is arranged on the outer surface of the heel air bag 107, the front palm patch piezoelectric pressure sensor 102, the arch patch piezoelectric pressure sensor 103 and the heel patch piezoelectric pressure sensor 104 are connected with the control chip in the control module 2, and the pressure of the front palm area, the arch area and the heel area can be monitored in real time. The leg patch piezoelectric pressure sensor 105 is arranged on the outer surface of the calf air bag 108, the foot back patch piezoelectric pressure sensor 110 is arranged on the outer surface of the foot back air bag 109, and the leg patch piezoelectric pressure sensor 105 and the foot back patch piezoelectric pressure sensor 110 are connected with the control chip, so that the pressure of the calf and the foot back area can be monitored in real time.

[0045] The specific control method of the control chip is as follows:

[0046] Step one, calculate the total effective contact area of multiple areas, the calculation equation is as follows:

[0047] S _total =S1+S2×0.6+S3+S4×K4+S5×K5;

[0048] In the formula: S1 is the effective contact area of the heel area, S2 is the effective contact area of the arch area, S3 is the effective contact area of the front palm area, S4 is the effective contact area of the foot back area, S5 is the effective contact area of the calf area, K4 is the effective pressure coefficient of the foot back, and K5 is the calf muscle thickness correction coefficient;

[0049] Example: body weight 70 kg, foot length 25 cm, calf length 35 cm, calf girth 35 cm (normal), foot back normal skin patient

[0050] S1=0.002×70+0.003=0.143m²

[0051] S2=0.0015×70+0.002=0.107m², effective area=0.107×0.6=0.0642m²

[0052] S3=0.0025×70+0.004+0.0005×(25-30)=0.1765m²

[0053] S4=0.001×70+0.0015+0.0003×(25-30)=0.07m², effective area=0.07×0.8=0.056m²

[0054] S5=0.012×35+0.005-0.0002×(70-60)=0.42+0.005-0.002=0.423m², effective area=0.423×1.0=0.423m²

[0055] S _total =0.143+0.0642+0.1765+0.056+0.423=0.8627m².

[0056] Step two, according to the effective contact area, the base pressure gradient calculation, the equation is as follows:

[0057] P _base =(K1×W1+K4×W4+K5×W5) / S _total ;

[0058] In the formula: W1 is the weight of the foot, W4 is the weight of the foot, W5 is the weight of the calf, K1 is the effective pressure coefficient of the foot;

[0059] Example: 70kg patient, prevention of DVT, S _total =0.8627m²

[0060] W1=0.7×70=49kg, W4=0.1×70=7kg, W5=0.2×70=14kg

[0061] P _base =(0.8×49+0.4×7+0.6×14) / 0.8627=(39.2+2.8+8.4) / 0.8627≈50.4 / 0.8627≈58.4Pa≈0.44mmHg.

[0062] Step three, the pressure correction calculation, the equation is as follows:

[0063] P _target =P _base ×K _age ×K _edema ×K _dorsal ×K _calf ;

[0064] In the formula: K _age is the age correction coefficient; K _edema is the edema correction coefficient, K _dorsal is the foot back state correction coefficient; K _calf is the calf muscle tension correction coefficient;

[0065] Example: 70 years old (K _age =0.95), 2 degree edema (K _edema =1.3), mild hyperemia of the foot (K _dorsal=0.9), medium calf muscle tension (K _calf =1.0), P _base =0.44 mmHg:

[0066] P _target =0.44 x 0.95 x 1.3 x 0.9 x 1.0 ≈ 0.44 x 1.1115 ≈ 0.49 mmHg

[0067] Target pressure distribution in different zones (according to the gradient principle):

[0068] Target pressure of the foot bottom zone (P _target1 ) = P _target x 1.4 ≈ 0.69 mmHg (40% of the total)

[0069] Target pressure of the calf zone (P _target5 ) = P _target x 1.2 ≈ 0.59 mmHg (35% of the total)

[0070] Target pressure of the instep zone (P _target4 ) = P _target x 0.8 ≈ 0.39 mmHg (25% of the total).

[0071] First, the shoe sole part 7 is attached to the bottom of the patient's foot, and the patient's leg is attached to the calf support part 12, then the instep support part 9 is locked with the upper part 5, and the calf connecting part 10 is locked with the calf support part 12. The airflow is delivered by the micro air pump 6 through the main air pipe 113, and the main air pipe 113 delivers the airflow to the first air hose 111, the second air hose 114, the third air hose 117, the fourth air hose 118 and the fifth air hose 120. The first air hose 111, the second air hose 114, the third air hose 117, the fourth air hose 118 and the fifth air hose 120 deliver the airflow to the forefoot air bag 101, the arch air bag 106, the heel air bag 107, the calf air bag 108 and the foot air bag respectively. At the same time, the forefoot piezoelectric pressure sensor 102, the arch piezoelectric pressure sensor 103, the heel piezoelectric pressure sensor 104, the leg piezoelectric pressure sensor 105 and the instep piezoelectric pressure sensor 110 detect the pressure in real time. When the pressure of the forefoot air bag 101, the arch air bag 106, the heel air bag 107, the calf air bag 108 and the foot air bag reaches the corresponding target pressure value, the control chip controls the first electromagnetic valve 112, the second electromagnetic valve 115, the third electromagnetic valve 116, the fourth electromagnetic valve 119 or the fifth electromagnetic valve 121 to run, so that it controls the corresponding first air hose 111, second air hose 114, third air hose 117, fourth air hose 118 and fifth air hose 120 to close, thereby being able to independently control the pressure of each air bag and pressurize and relax each area of the foot, which can effectively prevent the formation of venous thrombosis and greatly improve the prevention effect of venous thrombosis.

[0072] The control chip in the present application is W801, and the core parameters are: 32-bit Xtensa® LX6 core, 80MHz main frequency, 2MB Flash / 288KB RAM built-in, supporting Bluetooth 5.0 / BLE / Wi-Fi.

[0073] Please refer to Figure 8 The upper part 5 and the calf support part 12 are provided with locking fixing mechanisms 3, the fixing mechanism 3 includes a flexible rack 33, the flexible rack 33 is arranged on one side surface of the calf connecting part 10 and the instep support part 9, the flexible rack 33 corresponds to the locking seat 31, the locking seat 31 is arranged on one side of the upper part 5 and the calf support part 12, the driving shaft 34 is rotatably arranged in the locking seat 31, the gear 35 is arranged on the driving shaft 34, the gear 35 corresponds to the flexible rack 33, and the tightness of the flexible rack 33 can be adjusted, the driving shaft 34 is connected with the output shaft of the driving motor 36, the driving motor 36 is arranged in the locking seat 31, the driving motor 36 is connected with the control chip, and the device can be automatically fixed on the foot position of the patient.

[0074] When worn, the rack on the calf connecting part 10 and the instep supporting part 9 are respectively inserted into the locking port 32 of the locking seat 31 and are in contact with the gear 35. The driving motor 36 drives the driving shaft 34 to rotate, the driving shaft 34 drives the gear 35 to rotate, the gear 35 drives the flexible rack 33 to move. When the flexible rack 33 moves, the calf connecting part 10 and the instep supporting part 9 are closely attached to the lateral surface of the calf and the instep of the patient. At the same time, the instep patch piezoelectric pressure sensor 110 monitors the pressure of the foot supporting part. When the pressure reaches a fixed pressure threshold, the control chip controls the driving motor 36 to stop running, thereby automatically locking the instep supporting part 9.

[0075] The other side of the upper part 5 is also provided with a fixed band 8, which can assist in fixing the instep supporting part 9.

[0076] The other side of the sole part 7 is also provided with a battery pack 4, which can be charged and used cyclically, and provides operating power for the device.

[0077] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A portable sleeve type plantar venous pump comprising a sole portion (7), an upper portion (5) and a calf support portion (12) integral with the upper portion (5), characterized in that: The calf supporting part (12) is connected with the calf connecting part (10) through a hinge (11) on one side, the instep supporting part (9) is arranged on one side of the calf connecting part (10), the sole part (7), the instep supporting part (9) and the calf supporting part (12) are internally provided with an air bag pressurizing mechanism (1) for independent control; The air bag pressurizing mechanism (1) comprises a sole air bag structure, a calf air bag (108) and an instep air bag (109), the sole air bag structure is arranged on the sole part (7), the calf air bag (108) is arranged on the inner surface of the calf supporting part (12), the instep air bag (109) is arranged on the inner surface of the instep supporting part (9), the sole air bag structure, the calf air bag (108) and the instep air bag (109) are connected with a micro air pump (6), and the calf supporting part (12) is further provided with a control module (2) on one side, the control module (2) is used for controlling the air supply amount of the micro air pump (6) to the sole air bag structure, the calf air bag (108) and the instep air bag (109). The shoe upper part (5) and the calf supporting part (12) are provided with a fixing mechanism (3) for automatically locking the instep supporting part (9).

2. A portable sleeve-type plantar venous pump according to claim 1, characterized in that: The sole air bag structure comprises a forefoot air bag (101), an arch air bag (106) and a heel air bag (107), the forefoot air bag (101), the arch air bag (106) and the heel air bag (107) are sequentially arranged on the side surface of the sole part (7), the forefoot air bag (101), the arch air bag (106) and the heel air bag (107) are connected with a main air supply pipe (113), the main air supply pipe (113) is arranged in the sole part (7), and the main air supply pipe (113) is connected with the micro air pump (6), and the micro air pump (6) is arranged on the lower side of the sole part (7).

3. A portable sleeve-type plantar venous pump according to claim 2, characterized in that: The forefoot air bag (101) is connected with the main air supply pipe (113) through a first air supply hose (111), the arch air bag (106) is connected with the main air supply pipe (113) through a second air supply hose (114), the heel air bag (107) is connected with the main air supply pipe (113) through a third air supply hose (117), a first electromagnetic valve (112) is arranged on the first air supply pipe, a second electromagnetic valve (115) is arranged on the second air supply hose (114), and a third electromagnetic valve (116) is arranged on the third air supply hose (117).

4. The portable sleeve-type plantar venous pump according to claim 1, characterized in that: The calf air bag (108) is connected with the main air supply pipe (113) through a fourth air supply hose (118), and a fourth electromagnetic valve (119) is arranged on the fourth air supply hose (118).

5. The portable sleeve-type plantar venous pump according to claim 1, wherein: The instep air bag (109) is connected with the main air supply pipe (113) through a fifth air supply hose (120), and a fifth electromagnetic valve (121) is arranged on the fifth air supply hose (120).

6. The portable sleeve-type plantar venous pump according to claim 1, wherein: The forefoot patch piezoelectric pressure sensor (102) is arranged on the outer surface of the forefoot air bag (101), the arch patch piezoelectric pressure sensor (103) is arranged on the outer surface of the arch air bag (106), and the heel patch piezoelectric pressure sensor (104) is arranged on the outer surface of the heel air bag (107), and the forefoot patch piezoelectric pressure sensor (102), the arch patch piezoelectric pressure sensor (103) and the heel patch piezoelectric pressure sensor (104) are connected with the control chip in the control module (2).

7. The portable sleeve-type plantar venous pump according to claim 1, wherein: The leg patch piezoelectric pressure sensor (105) is arranged on the outer surface of the calf air bag (108), and the foot back patch piezoelectric pressure sensor (110) is arranged on the outer surface of the foot back air bag (109), and the leg patch piezoelectric pressure sensor (105) and the foot back patch piezoelectric pressure sensor (110) are connected with the control chip.

8. A portable sleeve type plantar venous pump according to claim 6 or 7, characterized in that: The specific control method of the control chip is as follows: Step one, calculate the total effective contact area of multi-region, the calculation equation is as follows: S _total =S1+S2×0.6+S3+S4×K4+S5×K5; In the formula, S1 is the effective contact area of the heel area, S2 is the effective contact area of the arch area, S3 is the effective contact area of the forefoot area, S4 is the effective contact area of the foot back area, S5 is the effective contact area of the calf area, K4 is the effective pressure coefficient of the foot back area, and K5 is the calf muscle thickness correction coefficient. Step two, gradient calculation of base pressure according to effective contact total area, calculation equation as follows: P _base = (K1 x W1 + K4 x W4 + K5 x W5) / S _total ; In the formula, W1 is the weight of the foot bottom area, W4 is the weight of the foot back area, W5 is the weight of the calf area, K1 is the effective pressure coefficient of the foot bottom area. Step three, calculate the correction to pressure, equation as follows: P _target = P _base x K _age x K _edema x K _dorsal x K _calf ; where: K _age is an age correction factor; K _edema is an edema correction factor, K _dorsal is a dorsum of foot condition correction factor; K _calf is a calf muscle tone correction factor.

9. The portable sleeve-type plantar venous pump according to claim 1, wherein: The fixing mechanism (3) comprises a flexible rack (33), the flexible rack (33) is arranged on one side surface of the calf connecting part (10) and the instep supporting part (9), the flexible rack (33) corresponds to the locking seat (31), the locking seat (31) is arranged on one side of the upper part (5) and the calf supporting part (12), the driving shaft (34) is rotatably arranged in the locking seat (31), the gear (35) is arranged on the driving shaft (34), and the gear (35) corresponds to the flexible rack (33).

10. A portable sleeve-type plantar venous pump according to claim 9, characterized in that: The driving shaft (34) is connected with the output shaft of the driving motor (36), the driving motor (36) is arranged in the locking seat (31), and the driving motor (36) is connected with the control chip.

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