A wearable rehabilitation exercise device and exercise system for post-operative rehabilitation of lumbar disc herniation

Abstract

The present invention belongs to the technical field of the treatment of intervertebral disc herniation, and discloses a wearable rehabilitation exercise device and an exercise system for postoperative intervertebral disc herniation, including a seat. A chair back is fixedly connected to the top of the seat. A support strap is slidably arranged on the chair back. An installation box is fixedly connected to one side of the support strap close to the chair back. A moving groove is formed in the chair back. A fixing box is slidably arranged inside the moving groove. A disassembly and assembly mechanism for installing the installation box is arranged inside the fixing box. The installation box is sleeved inside the fixing box and is slidably connected thereto. By setting up the cooperation of structures such as a clamping plate, a spring, a fixing rod and a disassembly and assembly component, it is convenient for the patient to get up, solving the problems that the existing rehabilitation device has a single structure, has great limitations in the rehabilitation training of the lumbar spine, when the patient needs to get up or do other actions, he still needs the help of other people, is inconvenient to wear, and is not convenient for the patient to walk freely.

Description

Technical Field

[0001] The present invention belongs to the technical field of the treatment of lumbar disc herniation, and specifically relates to a wearable rehabilitation exercise device and exercise system for postoperative rehabilitation of lumbar disc herniation. Background Art

[0002] The intervertebral disc is a sealed body located between two vertebral bodies of the human spine, composed of a cartilage plate, an annulus fibrosus, and a nucleus pulposus. Due to people's long-term sedentary lifestyle and lack of exercise, the lumbar and dorsal muscles become flaccid, resulting in degeneration and herniation of the intervertebral disc, which easily causes symptoms of lumbar disc herniation. Severe patients need surgical treatment and then recover through postoperative exercise. Since lumbar patients have limited physical strength after surgery, they cannot independently perform rehabilitation exercises. They need to rely on devices that assist in postoperative rehabilitation exercises for lumbar patients.

[0003] For example, the utility model with the publication number CN215504032U discloses a postoperative rehabilitation exercise assistance device for lumbar disc herniation, including a base plate. The top of the base plate is evenly and symmetrically connected with support rods. The top of the support rods is fixedly connected with a fixing plate. One end of the fixing plate is rotatably installed with a flipping plate. Attached cushions are attached to the tops of the fixing plate and the flipping plate. An embedding groove is opened at the bottom of the flipping plate. The structure of the present utility model is scientifically reasonable. Through the provided adjustment and massage mechanism, the massage intensity and effect on the waist can be quickly adjusted according to the patient's rehabilitation exercise needs, increasing the adjustability of the postoperative rehabilitation exercise assistance device for lumbar disc herniation during use. Through the provided angle precise adjustment mechanism, the flipping angle of the flipping plate can be accurately marked and adjusted, facilitating the adjustment of the sitting posture angle during the postoperative exercise of patients with lumbar disc herniation, and increasing the force adjustability during the postoperative exercise of patients with lumbar disc herniation.

[0004] When the above device performs rehabilitation training on the lumbar spine, it usually requires a person to lie on the fixing plate and be massaged by the massage component, with relatively large limitations. When the patient needs to get up or do other actions, they also need the help of other people. The postoperative rehabilitation bed has a single function and is difficult to meet the various needs of patients. It is inconvenient to wear and not convenient for patients to walk freely.

[0005] Therefore, a wearable rehabilitation exercise device and exercise system for postoperative lumbar disc herniation are proposed to solve the problems raised in the background art. Summary of the Invention

[0006] To solve the problems in the above background art, that is, the existing rehabilitation device has a single structure, with relatively large limitations during the rehabilitation training of the lumbar spine. When the patient needs to get up or do other actions, they also need the help of other people. It is inconvenient to wear and not convenient for patients to walk freely, the present invention provides a wearable rehabilitation exercise device and exercise system for postoperative lumbar disc herniation.

[0007] To achieve the above object, the present invention provides the following technical solution: A post-operative rehabilitation exercise device for lumbar disc herniation, including a seat, the top of the seat is fixedly connected with a backrest, a support strap is slidably arranged on the backrest, one side of the support strap close to the backrest is fixedly connected with an installation box, a moving groove is opened on the backrest, a fixed box is slidably arranged inside the moving groove, and a disassembly and assembly mechanism for installing the installation box is arranged inside the fixed box. The installation box is sleeved inside the fixed box and is slidably connected with it;

[0008] The disassembly and assembly mechanism includes two clamping plates, the two clamping plates are symmetrically arranged inside the fixed box, two symmetric fixing rods and springs are fixedly connected to one side of the two clamping plates close to the inner wall of the fixed box, and the centers of the two clamping plates on the side away from each other are fixedly connected with moving rods. The two moving rods penetrate through the fixed box and are slidably connected with the installation box. One end of each of the two moving rods away from each other is fixedly connected with a moving plate, and a driving component for driving the two moving plates to approach or move away from each other is arranged on the backrest;

[0009] Two symmetric card slots are opened on one side of the installation box close to the fixed box, and two groups of symmetric fixing holes are opened on both symmetric sides of the installation box. The card slots are slidably clamped with the adjusting rods, and the fixing rods are slidably inserted into the fixing holes.

[0010] Preferably, the driving component includes two racks, the two racks are fixedly connected to one end of the two adjusting rods away from the fixed box, the two racks are symmetrically arranged on both sides of the backrest, a gear is meshed at the tooth openings of the two racks, a control motor is fixedly arranged at the central axis of the gear, and a slider is rotatably connected to one side of the gear close to the backrest. A slideway is fixedly connected to the side of the backrest away from the seat, and the slider slides along the slideway.

[0011] Preferably, a heating belt is fixedly arranged on the inner wall of the support strap, the heating belt contacts the human waist, and a connection buckle is arranged at the connection of the side of the heating belt away from the installation box.

[0012] Preferably, the seat includes two first connecting plates and second connecting plates hinged to each other. Electric telescopic frames are fixedly connected to the bottoms of the first connecting plate and the second connecting plate. Pulleys are arranged at the bottoms of the electric telescopic frames. Notches are opened on the first connecting plate and the second connecting plate, and the notches can accommodate the patient's legs. An adjusting mechanism for adjusting the angles of the two is arranged at the bottoms of the first connecting plate and the second connecting plate.

[0013] Preferably, two symmetric armrests are fixedly connected to both the first connecting plate and the second connecting plate, and a control panel is arranged at the top of one of the armrests. The control panel is electrically connected to the electric telescopic frame.

[0014] Preferably, an electric push rod is fixedly connected to the top of the fixed box, the top of the electric push rod is fixedly connected to the moving groove, and the electric push rod is electrically connected to the control panel.

[0015] Preferably, the adjusting mechanism includes a first half gear, the middle shaft of the first half gear is rotatably connected to the second connecting plate, an adjusting motor is fixedly arranged at the middle shaft of the first half gear, the tooth opening of the first half gear meshes with a second half gear, and the second half gear is rotatably connected to the bottom of the first connecting plate.

[0016] Preferably, a postoperative rehabilitation exercise system for lumbar disc herniation includes a control module and a training module. S1: Control module: used to control the overall operation of the postoperative rehabilitation exercise device for lumbar disc herniation, realize the intelligent use of the entire device, control the operation of the adjusting motor, the control motor, the electric push rod, and the electric telescopic frame, and communicate with the control panel; S2: Training module: used to control the heating belt to generate heat and realize the massage and heat preservation of the patient's waist.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] Through the cooperation of structures such as the clamping plate, spring, and fixed rod disassembly and assembly components, the present invention facilitates the quick disassembly and assembly of the support strap and the seat, which is convenient for the patient to get up. By using the disassembly and assembly mechanism to disassemble and assemble the support strap, the patient can not only get up easily but also receive treatment. The driving component drives the two moving plates to approach each other, thereby driving the spring to stretch, making the fixed rod away from the fixing hole, which is convenient for taking out the installation box along the card slot, and thus achieving the quick separation of the installation box and the fixed box. This facilitates the realization of various forms of use, and solves the problems of the single structure of the existing rehabilitation device, large limitations in lumbar rehabilitation training, the need for the help of other personnel when the patient needs to get up or do other actions, inconvenient wearing, and inconvenient for the patient to walk freely.

[0019] Through the cooperation of structures such as gears and racks, the present invention facilitates the realization of the effect of automatic disassembly, which is convenient for the patient to control. By driving the control motor to operate through the control panel, driving it to rotate forward and reverse, the gear rotates forward and reverse, thereby driving the two racks to approach or move away from each other. When they approach each other, they drive the two moving plates and the clamping plate to approach each other, and the spring expands and contracts, which is convenient for separating the fixed box and the installation box. When they move away from each other, they drive the clamping plates to move away from each other, and then the fixed rod approaches the fixing hole, which is convenient for inserting and fixing it to realize the fixation of the two.

[0020] Through the cooperation of structures such as the first half gear, the second half gear, and the notch, the present invention facilitates the patient to stand up and sit down, achieves the correction of sitting posture, and uses the adjustment motor to drive the rotation of the first half gear, thereby driving the rotation of the second half gear. The meshing of the two realizes the adjustment of the angle, drives the opening and closing of the first connecting plate and the second connecting plate, and further facilitates the opening and closing of the notch, making it convenient for the patient to move out of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is a schematic diagram of the cooperation between the backrest and the drive assembly of the present invention;

[0023] Figure 3 is a schematic diagram of the cooperation between the moving plate and the electric push rod of the present invention;

[0024] Figure 4 is a schematic cross-sectional structural diagram of the present invention;

[0025] Figure 5 is a schematic structural diagram of the support strap of the present invention;

[0026] Figure 6 is Figure 3 an enlarged view of part A in

[0027] Figure 7 is Figure 4 an enlarged view of part B in

[0028] Figure 8 is Figure 5 an enlarged view of part C in

[0029] In the figure: 1. Seat; 11. First connecting plate; 12. Second connecting plate; 13. Electric telescopic frame; 14. Armrest; 2. Support strap; 21. Heating belt; 22. Connection buckle; 23. Installation box; 231. Card slot; 232. Fixing hole; 3. Backrest; 31. Moving slot; 32. Fixed box; 4. Disassembly and assembly mechanism; 41. Card board; 42. Fixed rod; 43. Spring; 44. Moving plate; 45. Drive assembly; 451. Rack; 452. Gear; 453. Control motor; 454. Slide block; 5. Electric push rod; 6. Adjustment mechanism; 61. First half gear; 62. Second half gear; 63. Adjustment motor; 7. Control panel. DETAILED DESCRIPTION OF THE INVENTION

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] As Figures 1 to 8 shown, the present invention provides a wearable rehabilitation exercise device for postoperative lumbar disc herniation. There is a seat 1, a backrest 3 is fixedly connected to the top of the seat 1, a support strap 2 is slidably arranged on the backrest 3, an installation box 23 is fixedly connected to the side of the support strap 2 close to the backrest 3, a moving groove 31 is opened on the backrest 3, a fixed box 32 is slidably arranged inside the moving groove 31, a disassembly and assembly mechanism 4 for installing the installation box 23 is arranged inside the fixed box 32, the installation box 23 is sleeved inside the fixed box 32 and is slidably connected to it. The disassembly and assembly mechanism 4 includes two clamping plates 41, the two clamping plates 41 are symmetrically arranged inside the fixed box 32, two symmetric fixing rods 42 and springs 43 are fixedly connected to the sides of the two clamping plates 41 close to the inner wall of the fixed box 32, the central positions of the sides of the two clamping plates 41 away from each other are fixedly connected with moving rods, the two moving rods penetrate through the fixed box 32 and are slidably connected to the installation box 23, moving plates 44 are fixedly connected to the ends of the two moving rods away from each other, and a driving component 45 for driving the two moving plates 44 to approach or move away from each other is arranged on the backrest 3. Two symmetric clamping grooves 231 are opened on the side of the installation box 23 close to the fixed box 32, and two groups of symmetric fixing holes 232 are opened on both symmetric sides of the installation box 23. The clamping grooves 231 are slidably clamped with the adjusting rods, and the fixing rods 42 are slidably inserted into the fixing holes 232.

[0032] Adopting the above solution: By placing the patient on the seat 1, using the support strap 2 to support and bind the waist, and fixing the support strap 2 at the waist position through the connection buckle 22. At this time, by pressing the control panel 7 to drive the electric push rod 5 to expand and contract, the fixed box 32 is driven to slide along the backrest 3, driving the installation box 23 to move synchronously, so as to drive the position adjustment of the entire support strap 2, facilitating the treatment of the waists of patients with different heights, improving the applicability of the device. When the patient needs to get up, the support strap 2 is disassembled and assembled by using the disassembly and assembly mechanism 4, so that the patient can get up and receive treatment at the same time. The driving component 45 is used to drive the two moving plates 44 to approach each other, thereby driving the spring 43 to stretch, making the fixing rod 42 away from the fixing hole 232, facilitating the removal of the installation box 23 along the clamping groove 231, and thus achieving the rapid separation of the installation box 23 and the fixed box 32, thereby facilitating the realization of various forms of use.

[0033] As Figure 7As shown in the figure, the driving assembly 45 includes two racks 451. The two racks 451 are fixedly connected to one end of the two adjusting rods away from the fixed box 32. The two racks 451 are symmetrically arranged on both sides of the backrest 3. A gear 452 is engaged at the tooth openings of the two racks 451. A control motor 453 is fixedly arranged at the central axis of the gear 452. A slider 454 is rotatably connected to the side of the gear 452 close to the backrest 3. A slideway is fixedly connected to the side of the backrest 3 away from the seat 1. The slider 454 slides along the slideway.

[0034] With the above solution: The driving assembly 45 drives the entire mounting box 23 and the fixed box 32 to be disassembled and assembled. The control panel 7 drives the control motor 453 to operate, driving it to rotate forward and reverse, so that the gear 452 rotates forward and reverse, thereby driving the two racks 451 to approach or move away from each other. When the two approach each other, the two moving plates 44 and the clamping plate 41 are driven to approach each other, and the spring 43 expands and contracts, facilitating the separation of the fixed box 32 and the mounting box 23. When the two move away from each other, the clamping plates 41 are driven to move away from each other, and then the fixing rod 42 approaches the fixing hole 232, facilitating its insertion and fixing to achieve the fixation of the two.

[0035] As Figure 5 As shown in the figure, a heating belt 21 is fixedly arranged on the inner wall of the support strap 2. The heating belt 21 contacts the human waist. A connection buckle 22 is arranged at the connection of the side of the heating belt 21 away from the mounting box 23. The seat 1 includes two first connecting plates 11 and second connecting plates 12 that are hinged to each other. Electric telescopic frames 13 are fixedly connected to the bottoms of the first connecting plate 11 and the second connecting plate 12. Pulleys are arranged at the bottoms of the electric telescopic frames 13. Notches are formed in the first connecting plate 11 and the second connecting plate 12, and the notches can accommodate the patient's legs. An adjusting mechanism 6 for adjusting the angle between the two is arranged at the bottoms of the first connecting plate 11 and the second connecting plate 12. Two symmetric armrests 14 are fixedly connected to both the first connecting plate 11 and the second connecting plate 12. A control panel 7 is arranged at the top of one of the armrests 14. The control panel 7 is electrically connected to the electric telescopic frame 13. An electric push rod 5 is fixedly connected to the top of the fixed box 32. The top of the electric push rod 5 is fixedly connected to the moving groove 31. The electric push rod 5 is electrically connected to the control panel 7.

[0036] With the above solution: The heating belt 21 is used to achieve heat preservation and massage of the waist, facilitating the recovery of the wound. At the same time, the support strap 2 is made of a relatively rigid material, which is stiff and has a supporting effect, and can ensure the correct posture of the waist. The patient can achieve the correct sitting posture by placing the legs in the notches, which is convenient for improving the problem of lumbar disc herniation. Among them, the fixation is achieved through the connection buckle 22, which is more convenient to wear. When standing up is needed, the quick standing is achieved through the combined use of the adjusting mechanism 6 and the disassembly and assembly mechanism 4.

[0037] As Figure 2As shown in the figure, the adjusting mechanism 6 includes a first half gear 61. The middle axis of the first half gear 61 is rotatably connected to the second connecting plate 12. An adjusting motor 63 is fixedly arranged at the middle axis of the first half gear 61. A second half gear 62 is meshed at the tooth opening of the first half gear 61. The second half gear 62 is rotatably connected to the bottom of the first connecting plate 11.

[0038] Adopting the above solution: Through the adjusting mechanism 6, the adjusting motor 63 drives the first half gear 61 to rotate, and then drives the second half gear 62 to rotate. The meshing of the two realizes the adjustment of the angle, drives the first connecting plate 11 and the second connecting plate 12 to open and close, and then facilitates the opening and closing of the notch, facilitating the patient to move out of the seat 1.

[0039] A wearable postoperative rehabilitation exercise system for lumbar disc herniation includes a control module and a training module.

[0040] S1: Control module: It is used to control the overall operation of the wearable postoperative rehabilitation exercise device for lumbar disc herniation, realize the intelligent use of the entire device, control the operation of the adjusting motor 63, the control motor 453, the electric push rod 5 and the electric telescopic frame 13 and is connected to the control panel 7.

[0041] S2: Training module: It is used to control the heating belt 21 to generate heat and realize the massage and heat preservation of the patient's waist.

[0042] Adopting the above solution: Through the combined use of the control module and the training module, the intelligent debugging of the entire device is realized, enabling the patient to perform multifunctional rehabilitation training on the seat 1 and achieving the effect of convenient wearing and movement.

[0043] Working principle and usage process of the present invention: When using this device, the patient drives the adjustment motor 63 to operate by using the control panel 7, drives the first half gear 61 and the second half gear 62 to mesh and rotate, realizes the opening of the first connecting plate 11 and the second connecting plate 12, and further facilitates the opening and closing of the notch, facilitating the patient to walk into the seat 1 and place the legs at the notch. Then, the seat 1 is closed by using the adjustment mechanism 6 to facilitate maintaining a good sitting posture. At this time, the support strap 2 is fixed to the waist through the connecting buckle 22 to achieve treatment. At this time, in order to adapt to patients of different heights, the electric push rod 5 extends and retracts to drive the fixed box 32 to slide along the backrest 3, driving the installation box 23 to move synchronously, and further achieving the effect of driving the position adjustment of the entire support strap 2, improving the applicability of the device. When the patient needs to get up, the driving component 45 is used to drive the two moving plates 44 to approach each other, further driving the spring 43 to stretch, making the fixed rod 42 away from the fixing hole 232, facilitating the removal of the installation box 23 along the card slot 231, and thus achieving the rapid separation of the installation box 23 and the fixed box 32, facilitating various forms of use. When the patient stands up and then returns to sit on the seat 1 along the original path, since the position of the fixed box 32 remains unchanged at this time, the fixed box 32 and the installation box 23 are just snapped together.

[0044] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A postoperative rehabilitation exercise device for lumbar disc herniation, including a seat (1), characterized in that: A backrest (3) is fixedly connected to the top of the seat (1). A support strap (2) is slidably arranged on the backrest (3). An installation box (23) is fixedly connected to the side of the support strap (2) close to the backrest (3). A moving groove (31) is formed in the backrest (3). A fixed box (32) is slidably arranged inside the moving groove (31). A disassembly and assembly mechanism (4) for installing the installation box (23) is arranged inside the fixed box (32). The installation box (23) is sleeved inside the fixed box (32) and is slidably connected thereto; The disassembly and assembly mechanism (4) includes two clamping plates (41). The two clamping plates (41) are symmetrically arranged inside the fixed box (32). Two symmetric fixed rods (42) and springs (43) are fixedly connected to the sides of the two clamping plates (41) close to the inner wall of the fixed box (32). Central positions of the sides of the two clamping plates (41) away from each other are fixedly connected with moving rods. The two moving rods penetrate through the fixed box (32) and are slidably connected to the installation box (23). Moving plates (44) are fixedly connected to the ends of the two moving rods away from each other. A driving assembly (45) for driving the two moving plates (44) to approach or move away from each other is arranged on the backrest (3); Two symmetric card slots (231) are formed in the side of the installation box (23) close to the fixed box (32). Two groups of symmetric fixing holes (232) are formed in the symmetric two sides of the installation box (23). The card slots (231) are slidably clamped with the adjusting rods. The fixed rods (42) are slidably inserted into the fixing holes (232).

2. The wearable rehabilitation exercise device for postoperative of lumbar intervertebral disc herniation according to claim 1, wherein: The driving assembly (45) includes two racks (451). The two racks (451) are fixedly connected to the ends of the two adjusting rods away from the fixed box (32). The two racks (451) are symmetrically arranged on the two sides of the backrest (3). A gear (452) is meshed with the tooth openings of the two racks (451). A control motor (453) is fixedly arranged at the central axis of the gear (452). A slider (454) is rotatably connected to the side of the gear (452) close to the backrest (3). A slideway is fixedly connected to the side of the backrest (3) away from the seat (1). The slider (454) slides along the slideway.

3. The wearable rehabilitation exercise device for postoperative rehabilitation of lumbar intervertebral disc herniation according to claim 1, characterized in that: A heating belt (21) is fixedly arranged on the inner wall of the support strap (2). The heating belt (21) contacts with the human waist. A connection buckle (22) is arranged at the connection position of the side of the heating belt (21) away from the installation box (23).

4. The wearable rehabilitation exercise device for post-operative of lumbar intervertebral disc herniation according to claim 1, wherein: The seat (1) includes two first connecting plates (11) and second connecting plates (12) which are hinged to each other. Electric telescopic frames (13) are fixedly connected to the bottoms of the first connecting plate (11) and the second connecting plate (12). Pulleys are arranged at the bottoms of the electric telescopic frames (13). Notches are formed in the first connecting plate (11) and the second connecting plate (12). The notches can accommodate the legs of a patient. An adjusting mechanism (6) for adjusting the angles of the two is arranged at the bottoms of the first connecting plate (11) and the second connecting plate (12).

5. The wearable rehabilitation exercise device for postoperative rehabilitation of lumbar intervertebral disc herniation according to claim 4, characterized in that: Two symmetrical handrails (14) are fixedly connected to both the first connecting plate (11) and the second connecting plate (12). A control panel (7) is provided at the top of one of the handrails (14). The control panel (7) is electrically connected to the electric telescopic frame (13).

6. The wearable rehabilitation exercise device for postoperative rehabilitation of lumbar disc herniation according to claim 1, wherein: An electric push rod (5) is fixedly connected to the top of the fixed box (32). The top of the electric push rod (5) is fixedly connected to the moving groove (31). The electric push rod (5) is electrically connected to the control panel (7).

7. The wearable rehabilitation exercise device for postoperative treatment of lumbar intervertebral disc herniation according to claim 4, characterized in that: The adjusting mechanism (6) includes a first half gear (61). The middle axis of the first half gear (61) is rotatably connected to the second connecting plate (12). An adjusting motor (63) is fixedly arranged at the middle axis of the first half gear (61). A second half gear (62) is engaged with the tooth opening of the first half gear (61). The second half gear (62) is rotatably connected to the bottom of the first connecting plate (11).

8. A postoperative rehabilitation exercise system for lumbar disc herniation, applied to a postoperative rehabilitation exercise device for lumbar disc herniation according to any one of claims 1-7, comprising a control module and a training module, characterized in that: S1: Control module: used to control the overall operation of the postoperative rehabilitation exercise device for lumbar disc herniation, realize the intelligent use of the whole device, control the operation of the adjusting motor (63), the control motor (453), the electric push rod (5) and the electric telescopic frame (13) and communicate with the control panel (7); S2: Training module: used to control the heating belt (21) to generate heat and realize the massage and heat preservation of the patient's waist.

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