Walking aid for cardiac postoperative patient

Abstract

The invention discloses a walking aid for a cardiac postoperative patient, and relates to the technical field of walking aids, the walking aid comprises a concave rod of a hollow structure, the two sides of the concave rod are both longitudinally and slidably sleeved with sleeves, the lower end of each sleeve is rotatably provided with a concave seat, and trundles are installed in the concave seats; the upper side of the concave rod is fixedly sleeved with two armrest sleeves, hand brake mechanisms are arranged at the bottoms of the armrest sleeves, and blood oxygen monitoring sensors are embedded in the upper portions of the armrest sleeves. According to the walking aid for the patient after the cardiac surgery, through the blood oxygen monitoring sensor, when the patient carries out walking training, the blood oxygen degree can be monitored in real time, and data are displayed on the displayer. When the heart rate exceeds a preset value, the buzzer can give an alarm sound to remind a patient to take a rest, and meanwhile data can be transmitted to the mobile phone APP, so that medical staff can conveniently observe the condition of the patient in real time, and the safety of the patient is ensured.

Description

Technical Field

[0001] This invention relates to the field of walking aids, specifically to a walking aid for patients after cardiac surgery. Background Technology

[0002] Post-cardiac surgery patients, especially those who have undergone heart valve replacement or coronary artery bypass grafting, face numerous challenges in early post-operative rehabilitation. Traditional rehabilitation methods often require full-time accompaniment by caregivers, which not only increases the burden on caregivers but also limits the patient's range of motion and autonomy. Furthermore, because post-operative cardiopulmonary function has not fully recovered, the risk of falls is high, and falls can lead to serious secondary injuries; therefore, walking aids are often necessary to facilitate walking.

[0003] While existing walking aids have achieved some success in assisting patients with walking, they still have many shortcomings in meeting the special needs of post-cardiac surgery patients. First, existing walking aids often lack real-time monitoring capabilities, failing to monitor key physiological indicators such as heart rate and blood oxygen saturation in a timely manner. If cardiopulmonary abnormalities occur, it is difficult to detect them promptly and take effective measures. Second, the braking systems of existing walking aids are usually quite simple, unable to flexibly adjust the braking force according to the patient's walking speed and stability, which may lead to the risk of falls during walking. Furthermore, the height adjustment function of existing walking aids is also limited, failing to meet the needs of patients of different heights and affecting the user experience. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a walking aid for post-cardiac surgery patients. It solves the problems of existing walking aids lacking real-time monitoring functions, failing to monitor key physiological indicators such as heart rate and blood oxygen saturation in a timely manner, and having braking systems that cannot flexibly adjust braking force according to the patient's walking speed and stability. Furthermore, the height adjustment function is also relatively limited, failing to meet the needs of patients of different heights.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a walking aid for post-cardiac surgery patients, comprising a hollow concave rod, sleeves that slide longitudinally on both sides of the concave rod, a concave seat that is rotatably mounted at the lower end of the sleeves, casters installed inside the concave seat, two armrest gloves that are fixedly mounted on the upper side of the concave rod, a handbrake mechanism at the bottom of the armrest gloves, and a blood oxygen monitoring sensor embedded in the upper part of the armrest gloves, and a display screen located between the two armrest gloves on the upper part of the concave rod.

[0006] The handbrake mechanism includes a hollow handbrake lever, a brake component located inside a concave seat above the caster, and a cable tube located on one side of the sleeve. Limiting shafts are connected to the upper parts of both ends of the handbrake lever. The upper end of the limiting shaft slides longitudinally through the bottom of the armrest and the bottom of the concave lever, and a limiting block is located inside the concave lever. A second spring is also sleeved outside the limiting shaft, with both ends connected to the upper part of the handbrake lever and the bottom of the armrest, respectively. A winding reel is located at the bottom of one end of the handbrake lever, and a rotating shaft is rotatably mounted inside the reel. A spiral spring is sleeved outside the rotating shaft, and a brake cable is wound around the spiral spring. The other end of the brake cable slides sequentially through the inner wall of the reel, the handbrake lever, and the inside of the cable tube, and connects to the brake component.

[0007] Preferably, the brake component includes an arc-shaped plate rotatably disposed inside the concave seat and located above the caster. The brake line is connected to the upper part of one side of the arc-shaped plate, and a brake pad is provided at the bottom of the other side of the arc-shaped plate. The upper part of one side of the arc-shaped plate is connected to the inner top side of the concave seat by a spring.

[0008] Preferably, a positioning bolt is screwed into one end of the handbrake lever to fix the brake cable.

[0009] Preferably, the blood oxygen monitoring sensor is used to monitor the patient's blood oxygen level, and the blood oxygen monitoring sensor has a built-in buzzer. When the blood oxygen level monitored by the blood oxygen monitoring sensor is higher than a preset value, its built-in buzzer will sound an alarm. The blood oxygen monitoring sensor is also connected to a display for displaying the monitoring information of the blood oxygen monitoring sensor. The blood oxygen monitoring sensor is also connected to a mobile APP for communication.

[0010] Preferably, an infusion rod is provided on the upper part of one side of the concave rod, and a rod-type hook is provided between the two sleeves.

[0011] Preferably, a pull rod is longitudinally slidably arranged inside both sides of the concave rod. The upper end of the pull rod slides longitudinally through the inner top side of the concave rod and is connected to a ball. A flange is provided outside the pull rod inside the concave rod, and a spring three is also sleeved on the outside of the pull rod. The two ends of the spring three are respectively connected to the upper part of the flange and the inner top side of the concave rod. A connecting rod is hinged to both sides of the lower end of the pull rod. A slot corresponding to the connecting rod is provided on both sides of one end of the concave rod. A limit strip is hinged to the inner top side of the slot. A positioning ball is integrally formed at the end of the limit strip away from its hinge point. The other end of the connecting rod is hinged to one side of the limit strip. Several positioning grooves that are adapted to the positioning ball are provided on both sides of the inner side of the sleeve.

[0012] Preferably, when the position of the positioning ball corresponds to the position of the positioning groove on the inner wall of the sleeve and the spring is in the reset state, the positioning ball is precisely engaged in the positioning groove.

[0013] Preferably, a tray positioning frame is also provided on one side of the sleeve. The tray positioning frame includes a housing seat fixedly disposed on the outer wall of the sleeve. Two L-shaped rods are rotatably disposed on the side of the housing seat away from the sleeve. An L-shaped groove is opened on the inner side of the L-shaped rod. A magnetic sheet is disposed on the inner side of the L-shaped groove parallel to the housing seat.

[0014] Preferably, the internal height of the L-shaped groove is adapted to the thickness of the tray, so that when both L-shaped rods are in a horizontal state, the tray can be inserted into the L-shaped groove on the two L-shaped rods.

[0015] Preferably, a knob is rotatably provided on the upper part of the housing base, and a worm gear is connected to the lower end of the knob inside the housing base. Both sides of the worm gear are engaged with worm wheels, and one end of each worm wheel is connected to the hinge point of two L-shaped rods.

[0016] This invention provides a walking aid for post-cardiac surgery patients, which has the following advantages compared with the prior art: This post-cardiac surgery patient uses a walking aid. Through a blood oxygen monitoring sensor, the patient's blood oxygen level can be monitored in real time during walking training, and the data is displayed on a screen. When the heart rate exceeds a preset value, a buzzer sounds an alarm to remind the patient to rest. Simultaneously, the data is transmitted to a mobile app, allowing medical staff to monitor the patient's condition in real time and ensure their safety.

[0017] This post-cardiac surgery patient uses a walking aid. If the casters are rolling too fast while walking, the patient can adjust the braking force by gripping the armrests and handbrake lever. Squeezing the handbrake lever moves the brake cable upwards, causing the brake pads to contact the casters, thus controlling the braking force. Greater contact force results in greater braking force, facilitating better walking for the patient.

[0018] The patient, who underwent cardiac surgery, uses a walker. Through a spiral spring mechanism, the brake cable remains constantly taut. Adjusting the walker's height does not affect the brake cable, ensuring proper brake operation and allowing the patient to smoothly apply the brakes when squeezing the handbrake lever upwards.

[0019] The patient, after cardiac surgery, uses a walking aid. The elasticity of spring three pulls the ball upwards, causing the lever to move upwards, rotating the limiting strip inwards, and disengaging the positioning ball from its positioning groove. Then, the concave rod is slid upwards to adjust to the appropriate height. Releasing the ball causes spring three to return the lever to its original position, and the positioning ball will engage with its corresponding positioning groove, fixing the concave rod within the sleeve, thus completing the height adjustment.

[0020] This post-cardiac surgery patient uses a walking aid. By turning a knob, the worm gear rotates, leveling the L-shaped rods and allowing the storage tray to be inserted into the L-shaped slots on the two rods. Since the storage trays are mostly made of steel, they are attracted by the magnetic plates inside the L-shaped slots, further securing the tray and preventing it from falling when items are placed on it. When the tray is no longer needed, it is removed, and the knob is turned again to level the L-shaped rods, allowing them to be stored away and reducing their space requirements. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the handbrake mechanism of the present invention; Figure 3 This is a schematic diagram of the internal structure of the winding reel of the present invention; Figure 4 This is a schematic diagram of the installation structure between the concave rod and the sleeve of the present invention; Figure 5 This is a schematic diagram of the internal structure of the concave rod and sleeve of the present invention; Figure 6 For the present invention Figure 5 A partially enlarged schematic diagram of the structure at point A; Figure 7 This is a schematic diagram of the structure of the tray positioning frame of the present invention; Figure 8 This is a schematic diagram of the internal structure of the housing base of the present invention.

[0022] In the diagram: 1. Concave rod; 2. Sleeve; 3. Concave seat; 4. Caster; 5. Hand glove; 6. Handbrake mechanism; 61. Handbrake lever; 62. Brake component; 621. Arc plate; 622. Spring 1; 623. Brake pad; 63. Conduit; 64. Limiting shaft; 65. Limiting block; 66. Spring 2; 67. Cable reel; 68. Rotating shaft; 69. Spiral spring; 610. Brake cable; 611. Positioning bolt; 7 1. Infusion rod; 8. Rod hook; 9. Tray positioning frame; 91. Housing base; 92. L-shaped rod; 93. L-shaped groove; 94. Magnetic sheet; 95. Knob; 96. Worm gear; 97. Worm wheel; 10. Display; 11. Blood oxygen monitoring sensor; 12. Pull rod; 13. Ball; 14. Flange; 15. Spring; 16. Positioning groove; 17. Groove opening; 18. Limiting strip; 19. Positioning ball; 20. Connecting rod. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1 This invention provides a walking aid for post-cardiac surgery patients, comprising a hollow concave rod 1, sleeves 2 that slide longitudinally on both sides of the concave rod 1, a concave seat 3 that is rotatably mounted at the lower end of the sleeves 2, casters 4 installed inside the concave seat 3, and auxiliary casters on both sides of the concave seat 3 to increase the stability of the device, two armrests 5 that are fixedly mounted on the upper side of the concave rod 1, a handbrake mechanism 6 that is provided at the bottom of the armrests 5, and a blood oxygen monitoring sensor 11 that is embedded in the upper part of the armrests 5, and a display 10 that is located between the two armrests 5 on the upper part of the concave rod 1.

[0025] Please see Figures 1-3 In this embodiment of the invention, the handbrake mechanism 6 includes a hollow handbrake lever 61, a brake component 62 located inside the concave seat 3 above the caster 4, and a cable tube 63 located on one side outside the sleeve 2. Both ends of the handbrake lever 61 are connected to a limiting shaft 64. The upper end of the limiting shaft 64 slides longitudinally through the bottom of the armrest 5 and the bottom of the concave rod 1, and a limiting block 65 is provided inside the concave rod 1. A second spring 66 is also sleeved on the outside of the limiting shaft 64. The two ends of the second spring 66 are respectively connected to the upper part of the handbrake lever 61 and the bottom of the armrest 5. A winding reel 67 is provided at the bottom of one end of the handbrake lever 61. A rotating shaft 68 is rotatably provided inside the winding reel 67. A spiral spring 69 is sleeved on the outside of the rotating shaft 68. A brake cable 610 is wound on the outside of the spiral spring 69. The other end of the brake cable 610 slides sequentially through the inner wall of the winding reel 67, the inside of the handbrake lever 61 and the cable tube 63, and is connected to the brake component 62.

[0026] Please see Figures 1-2In this embodiment of the invention, the brake component 62 includes an arc-shaped plate 621 rotatably disposed inside the concave seat 3 above the caster 4. A brake line 610 is connected to the upper part of one side of the arc-shaped plate 621, and a brake pad 623 is disposed at the bottom of the other side of the arc-shaped plate 621. The upper part of one side of the arc-shaped plate 621 is connected to the inner top side of the concave seat 3 by a spring 622. Through the specific structural design of the brake component 62, the rotation of the arc-shaped plate 621 is utilized. When the brake line 610 is pulled, it can drive the arc-shaped plate 621 to rotate, so that the brake pad 623 at the bottom contacts the caster 4 to generate friction, thereby achieving precise braking. At the same time, the spring 622 can provide a reset force when the brake is released, so that the arc-shaped plate 621 automatically resets, releasing the brake on the caster 4 and ensuring smooth walking.

[0027] Please see Figure 2 In this embodiment of the invention, a positioning bolt 611 is screwed into one side of the handbrake lever 61 to fix the brake cable 610. By setting the positioning bolt 611, the position of the brake cable 610 in the winding reel 67 can be fixed, preventing the brake cable 610 from loosening or shifting, ensuring the stability of the braking force transmission, and improving the reliability of the braking system.

[0028] Please see Figure 1 In this embodiment of the invention, the blood oxygen monitoring sensor 11 is used to monitor the patient's blood oxygen level. The blood oxygen monitoring sensor 11 has a built-in buzzer. When the blood oxygen level monitored by the blood oxygen monitoring sensor 11 is higher than a preset value, its built-in buzzer sounds an alarm. The blood oxygen monitoring sensor 11 is also connected to the display 10, which is used to display the monitoring information of the blood oxygen monitoring sensor 11. The blood oxygen monitoring sensor 11 is also connected to a mobile APP. Through the connection between the blood oxygen monitoring sensor 11, the display 10, and the mobile APP, real-time data display and remote monitoring are realized, making it convenient for patients and medical staff to keep track of their physical condition at any time. The built-in buzzer can promptly sound an alarm when the blood oxygen monitoring sensor 11 detects abnormal values, effectively reminding the patient to stop exercising and rest, and preventing sudden risks after cardiac surgery.

[0029] Please see Figure 1 In this embodiment of the invention, an infusion rod 7 is provided on the upper part of one side of the concave rod 1, and a rod hook 8 is provided between the two sleeves 2. By providing the infusion rod 7, it is convenient for the patient to hang the infusion bag during walking training without the need for someone else to hold it. By providing the rod hook 8 on the sleeve 2, it is convenient for the patient to carry water cups, personal items, or hang chest drainage bottles for treatment, which improves the practicality of the device and the convenience of the patient.

[0030] Please see Figure 1 and Figures 4-6In this embodiment of the invention, pull rods 12 are longitudinally slidably arranged on both sides of the concave rod 1. The upper end of the pull rod 12 slides longitudinally through the inner top side of the concave rod 1 and is connected to a ball 13. A flange 14 is provided on the outside of the pull rod 12 inside the concave rod 1, and a spring 3 15 is also sleeved on the outside of the pull rod 12. The two ends of the spring 3 15 are respectively connected to the upper part of the flange 14 and the inner top side of the concave rod 1. Connecting rods 20 are hinged to both sides of the lower end of the pull rod 12. A ball 13 is provided on both sides of one end of the concave rod 1. The slot 17 corresponding to the connecting rod 20 has a limiting strip 18 hinged to its top side. A positioning ball 19 is integrally formed at the end of the limiting strip 18 away from its hinge point. The other end of the connecting rod 20 is hinged to one side of the limiting strip 18. Several positioning grooves 16, matching the positioning balls 19, are provided on both sides of the sleeve 2. Through the cooperation of the pull rod 12, ball 13, spring 15, connecting rod 20, limiting strip 18, and positioning ball 19, a convenient height adjustment and locking mechanism is formed. Pulling the ball 13 upwards will cause the positioning ball 19 to disengage from the positioning groove 16 via the connecting rod 20 mechanism, releasing the lock. After adjusting the height, releasing the ball 13 allows the positioning ball 19 to re-enter the positioning groove 16 under the action of the spring 15, achieving quick fixation. The operation is simple and the locking is secure.

[0031] Please see Figures 5-6 In this embodiment of the invention, when the position of the positioning ball 19 corresponds to the position of the positioning groove 16 on the inner wall of the sleeve 2 and the spring 3 15 is in the reset state, the positioning ball 19 is precisely engaged in the positioning groove 16. By limiting the correspondence between the positioning ball 19 and the positioning groove 16 and the reset action of the spring 3 15, it is ensured that the positioning ball 19 can be accurately and stably engaged in the positioning groove 16 in the non-operating state, thereby ensuring the stability of the connection between the concave rod 1 and the sleeve 2, preventing the height of the walker from accidentally sliding during use, and ensuring patient safety.

[0032] Please see Figures 7-8 In this embodiment of the invention, a tray positioning frame 9 is also provided on one side of the sleeve 2. The tray positioning frame 9 includes a housing seat 91 fixedly disposed on the outer wall of the sleeve 2. Two L-shaped rods 92 are rotatably disposed on the side of the housing seat 91 away from the sleeve 2. An L-shaped groove 93 is opened on the inner side of the L-shaped rod 92. A magnetic sheet 94 is disposed on the inner side of the L-shaped groove 93 parallel to the housing seat 91. Through the design of the L-shaped rods 92 and the L-shaped groove 93 in the tray positioning frame 9, the tray can be physically held. Combined with the setting of the magnetic sheet 94, the tray made of metal material can be magnetically attracted. The double fixation effectively prevents the tray from slipping due to vibration during walking, increasing the safety of storing items.

[0033] Please see Figure 7In this embodiment of the invention, the internal height of the L-shaped groove 93 is adapted to the thickness of the storage tray, so that when both L-shaped rods 92 are in a horizontal state, the storage tray can be inserted into the L-shaped groove 93 on the two L-shaped rods 92. By limiting the internal height of the L-shaped groove 93 to be adapted to the thickness of the storage tray, it is ensured that the storage tray fits tightly after insertion and will not wobble up and down. When the two L-shaped rods 92 are in a horizontal state, the storage tray can be placed stably in the L-shaped groove 93, which improves the stability of the storage tray installation and the comfort of use.

[0034] Please see Figures 7-8 In this embodiment of the invention, a knob 95 is rotatably mounted on the upper part of the housing base 91. The lower end of the knob 95 is connected to a worm gear 96 inside the housing base 91. Both sides of the worm gear 96 are engaged with worm wheels 97. One end of each worm wheel 97 is connected to the hinge point of two L-shaped rods 92. By rotating the knob 95, the worm gear 96 is driven to rotate, which in turn drives the worm wheels 97 and the L-shaped rods 92 to rotate. Utilizing the self-locking characteristic of the worm wheel 97 and worm gear 96 transmission, the L-shaped rods 92 can be stably kept in a horizontal or vertical state, preventing the storage tray from accidentally flipping over. At the same time, it is convenient to store the L-shaped rods 92, saving space.

[0035] Working principle: When in use, the patient holds the armrest 5 and uses the rolling of the casters 4 to perform walking training. The blood oxygen monitoring sensor 11 will monitor the patient's blood oxygen level, and the real-time data will be displayed on the display 10. When the heart rate exceeds the preset value, such as exceeding the resting heart rate of 120 beats / minute, the buzzer built into the blood oxygen monitoring sensor 11 will sound an alarm to remind the patient to rest. At the same time, the blood oxygen monitoring sensor 11 will transmit the monitored data to a mobile APP, and medical staff can observe the patient's condition in real time through the mobile APP. When a patient walks with the aid of this device, if the caster 4 rolls too fast, the patient simultaneously grips the armrest 5 and the handbrake lever 61. Under the elasticity of spring 66, the patient squeezes the handbrake lever 61 upwards, causing the brake cable 610 to move upwards. Under the elasticity of spring 622, the other end of the brake cable 610 pulls one side of the arc plate 621 upwards, causing the other side of the arc plate 621 to move downwards, making the brake pad 623 contact the caster 4. The braking force can be controlled by the contact force between the brake pad 623 and the caster 4. The greater the contact force, the greater the braking force, making it easier for the patient to walk. By loosening the positioning bolt 611, the control of the brake cable 610 is released. If the brake cable 610 is too loose, it will automatically wind up under the elasticity of the spiral spring 69, thereby winding up the brake cable 610 and keeping the brake cable 610 taut. Then, tighten the positioning bolt 611 to hold the brake cable 610 in place. In this way, when the patient squeezes the handbrake lever 61 upwards, the braking action can be completed smoothly. Thanks to the spiral spring 69, adjusting the height of the walker will not affect the normal use of the brake. When height adjustment is required, under the elasticity of spring 15, the ball 13 is pulled upward to move the lever 12 upward. The connecting rods 20 on both sides of the lower end of the lever 12 will drive the limiting strip 18 to rotate inward, causing the positioning ball 19 to disengage from the positioning groove 16. Then, the concave rod 1 is slid upward to adjust the concave rod 1 to the appropriate height. After releasing the ball 13, spring 15 will reset the lever 12. The lever 12 will cause the connecting rod 20 to reset the positioning ball 19. The positioning ball 19 will then be inserted into the corresponding positioning groove 16, fixing the concave rod 1 inside the sleeve 2, thereby completing the height adjustment. When the tray needs to be secured, turn knob 95 to rotate the worm gear 96. The worm gear 96 then rotates the two meshing worm wheels 97, which in turn rotate the L-shaped rod 92 until it is horizontal. Then stop turning knob 95. Because the worm gear 96 has a self-locking function, the L-shaped rod 92 can always remain horizontal. Then insert the tray into the L-shaped slots 93 on the two L-shaped rods 92. Since the tray is mostly made of steel, it can be attracted by the magnetic pieces 94 inside the L-shaped slots 93, which further positions the tray. This prevents the tray from falling when items are placed on it. When the tray is no longer needed, remove it and turn knob 95 again to rotate the L-shaped rod 92 to a vertical position, thus storing the L-shaped rod 92 and reducing its space occupation.

[0036] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A walking aid for post-cardiac surgery patients, comprising a hollow concave rod (1), characterized in that: Both sides of the concave rod (1) are longitudinally slidably fitted with sleeves (2), and the lower end of the sleeve (2) is rotatably provided with a concave seat (3). The concave seat (3) is equipped with casters (4). Two handgrips (5) are fixedly fitted on the upper side of the concave rod (1). A handbrake mechanism (6) is provided at the bottom of the handgrips (5). A blood oxygen monitoring sensor (11) is embedded in the upper part of the handgrips (5). A display (10) is provided at the position between the two handgrips (5) on the upper part of the concave rod (1). The handbrake mechanism (6) includes a hollow handbrake lever (61), a brake component (62) located inside the concave seat (3) above the caster (4), and a conduit (63) located on one side of the sleeve (2). Both ends of the handbrake lever (61) are connected to limit shafts (64). The upper end of the limit shaft (64) slides longitudinally through the bottom of the armrest sleeve (5) and the bottom of the concave rod (1), and a limit block (65) is located inside the concave rod (1). A spring (66) is also sleeved on the outside of the limit shaft (64). The two ends of the spring (66) are connected to the upper part of the handbrake lever (61) and the bottom of the armrest (5) respectively. A winding reel (67) is provided at the bottom of one end of the handbrake lever (61). A rotating shaft (68) is rotatably provided inside the winding reel (67). A spiral spring (69) is sleeved on the outside of the rotating shaft (68). A brake cable (610) is wound on the outside of the spiral spring (69). The other end of the brake cable (610) slides through the inner wall of the winding reel (67), the inside of the handbrake lever (61) and the cable tube (63) in sequence and is connected to the brake component (62).

2. The walking aid for post-cardiac surgery patients according to claim 1, characterized in that: The brake component (62) includes an arc plate (621) rotatably disposed inside the concave seat (3) above the caster (4). The brake line (610) is connected to the upper part of one side of the arc plate (621). A brake pad (623) is provided at the bottom of the other side of the arc plate (621). The upper part of one side of the arc plate (621) is connected to the top side of the concave seat (3) through a spring (622).

3. A walking aid for post-cardiac surgery patients according to claim 1, characterized in that: One end of the handbrake lever (61) has a positioning bolt (611) screwed in by a thread to fix the brake cable (610).

4. A walking aid for post-cardiac surgery patients according to claim 1, characterized in that: The blood oxygen monitoring sensor (11) is used to monitor the patient's blood oxygen level. The blood oxygen monitoring sensor (11) has a built-in buzzer. When the blood oxygen level monitored by the blood oxygen monitoring sensor (11) is higher than the preset value, the built-in buzzer will sound an alarm. The blood oxygen monitoring sensor (11) is also connected to the display (10). The display (10) is used to display the monitoring information of the blood oxygen monitoring sensor (11). The blood oxygen monitoring sensor (11) is also connected to a mobile phone APP.

5. A walking aid for post-cardiac surgery patients according to claim 1, characterized in that: An infusion rod (7) is provided on the upper part of one side of the concave rod (1), and a rod hook (8) is provided between the two sleeves (2).

6. A walking aid for post-cardiac surgery patients according to claim 1, characterized in that: Both sides of the concave rod (1) are longitudinally slidably provided with pull rods (12). The upper end of the pull rod (12) slides longitudinally through the inner top side of the concave rod (1) and is connected to a ball (13). The outside of the pull rod (12) is provided with a flange (14) inside the concave rod (1), and a spring three (15) is also sleeved on the outside of the pull rod (12). The two ends of the spring three (15) are respectively connected to the upper part of the flange (14) and the inner top side of the concave rod (1). The lower end of the pull rod (12) Both sides are hinged with connecting rods (20). One end of the concave rod (1) is provided with slots (17) corresponding to the connecting rods (20) on both sides. The top side of the slot (17) is hinged with a limiting strip (18). The end of the limiting strip (18) away from its hinge point is integrally formed with a positioning ball (19). The other end of the connecting rod (20) is hinged to one side of the limiting strip (18). Both sides of the sleeve (2) are provided with a number of positioning grooves (16) that are adapted to the positioning ball (19).

7. A walking aid for post-cardiac surgery patients according to claim 6, characterized in that: When the position of the positioning ball (19) corresponds to the position of the positioning groove (16) on the inner wall of the sleeve (2) and the spring three (15) is in the reset state, the positioning ball (19) is just locked in the positioning groove (16).

8. A walking aid for post-cardiac surgery patients according to claim 1, characterized in that: A tray positioning frame (9) is also provided on one side of the sleeve (2). The tray positioning frame (9) includes a housing seat (91) fixedly installed on the outer wall of the sleeve (2). Two L-shaped rods (92) are rotatably installed on the side of the housing seat (91) away from the sleeve (2). An L-shaped groove (93) is opened on the inner side of the L-shaped rod (92). A magnetic piece (94) is provided on the inner side of the L-shaped groove (93) parallel to the housing seat (91).

9. A walking aid for post-cardiac surgery patients according to claim 8, characterized in that: The internal height of the L-shaped groove (93) is adapted to the thickness of the tray, so that when both L-shaped rods (92) are in a horizontal state, the tray can be inserted into the L-shaped groove (93) on the two L-shaped rods (92).

10. A walking aid for post-cardiac surgery patients according to claim 8, characterized in that: A knob (95) is rotatably provided on the upper part of the housing base (91). The lower end of the knob (95) is connected to a worm (96) inside the housing base (91). Both sides of the worm (96) are meshed with worm wheels (97). One end of each worm wheel (97) is connected to the hinge point of two L-shaped rods (92).

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