Leg fixing device for pelvic tumor radiotherapy

Abstract

The invention discloses a leg fixing device for pelvic tumor radiotherapy. The leg fixing device comprises a base, a bottom plate, a mounting plate, a leg restraining mechanism and a distraction mechanism, the bottom plate is cushioned by the cushion plates with different heights, so that the requirement of lifting the two lower limbs within a certain angle range can be met; the leg restraint mechanism slides on the bottom plate along with the mounting plate, namely, the leg restraint mechanism can slide to different positions of the lower limbs on the two sides of the patient, so that the lower limbs on the small yellow sides are cushioned and placed by the leg placement grooves at the knee positions of the lower limbs on the two sides of the patient; the pressing grooves are of a replaceable structure, and the pressing grooves with different sizes and specifications can be replaced to adapt to patients with different thicknesses and knee heights. The extension groove and the leg placement groove form a telescopic structure, so that the foot pedal is in direct contact with and bears the sole of a patient through stretching and retracting; restraint straps or bandages penetrate through the hollowed-out parts in a matched mode to restrain and fix the soles of the patient, and rotation of the lower limbs on the two sides of the patient is limited.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a leg fixing device for pelvic tumor radiotherapy. Background Art

[0002] Pelvic tumor radiotherapy is a treatment method that uses high-energy radiation to irradiate the pelvic area to kill or shrink tumor cells. This method is mainly used to treat pelvic malignancies or pelvic metastatic tumors, such as endometrial cancer, prostate cancer, cervical cancer, and rectal cancer. Pelvic radiotherapy is characterized by high precision, which can reduce damage to surrounding normal tissues and improve the treatment effect. During radiotherapy, patients need to be positioned according to the doctor's advice and use specific body position fixation methods (such as vacuum pads or prone frames) to ensure the accuracy of radiotherapy. At the same time, pelvic tumor radiotherapy also involves the measurement and control of residual urine volume in the bladder to ensure the accuracy of radiotherapy implementation.

[0003] However, radiotherapy may also bring some side effects, such as fatigue, nausea and vomiting, diarrhea, gastrointestinal dysfunction, malnutrition, and hematopoiesis caused by bone marrow suppression. Therefore, during radiotherapy, patients need to closely monitor their physical condition and follow the doctor's instructions for necessary care and supportive treatment. Pelvic tumor radiotherapy is an important treatment method, but it needs to be carried out under the guidance of a doctor, and attention should be paid to monitoring and responding to possible side effects.

[0004] Currently, the body of abdominal and pelvic radiotherapy is fixed with a vacuum pad, but there is no standard leg limiter for lower abdominal radiotherapy, especially inguinal radiotherapy. Usually, the patient maintains the stability of both lower limbs independently, or uses a simple pillow to support the patient's lower limbs.

[0005] The above operation usually has the following shortcomings: 1. The fixation of the bilateral lower limbs is unstable, which leads to an increase in the positioning error of the proximal lower limbs in the actual treatment operation, affecting the treatment accuracy and local control; 2. It cannot adapt to the fixation requirements of the bilateral lower limbs of patients with different leg lengths and leg thicknesses; Therefore, there is a need to provide a leg fixation device for pelvic tumor radiotherapy, which can stably fix the bilateral lower limbs during pelvic radiotherapy and can adapt to the leg fixation needs of different groups of people through convenient adjustment. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a leg fixation device for pelvic tumor radiotherapy, which is designed for stable fixation of the legs and adaptability to different groups of people. The leg placement slot can be extended and slid on the bottom plate and can rotate with the bottom plate; the leg placement slot is pressed and fixed by the patient's bilateral lower limbs from top to bottom through the pressure groove; In order to achieve the above technical objectives, the present invention is implemented by the following technical solutions: A leg fixation device for pelvic tumor radiotherapy, comprising: a base, a bottom plate, a mounting plate, a leg restraint mechanism, and a spreading mechanism; One end of the bottom plate is rotatably connected to one end of the base, and the other end is supported by a pad and forms an angle with the base; A mounting plate is slidably mounted on the bottom plate, and a leg restraint mechanism is rotatably mounted on the upper sides of the mounting plate; an opening mechanism is fixedly mounted on the middle of the mounting plate, and the opening mechanism is a gear rack mechanism, including a gear and two racks meshing with the gear at the same time, and the two-way movement of the gear drives the two racks to approach or move away from each other; the two outer ends of the two racks that are away from each other are rotatably connected to a leg restraint mechanism, and the two leg restraint mechanisms are driven to open or converge by the two-way rotation of the gear; The leg restraint mechanism comprises a leg placement groove, a cover plate, a pressure groove, a threaded rod, and an extension groove; the cover plate is slidably mounted on the leg placement groove, and a threaded rod is spirally connected to the middle portion, the threaded rod passes through the cover plate in the vertical direction, and a sleeve is rotatably connected to the bottom, an inverted U-shaped pressure groove is sleeved in the sleeve, and the rotation of the threaded rod drives the pressure groove to slide up and down under the cover plate; The extension slot is slidably connected with the leg placement slot to form a telescopic slot plate structure, the end of the extension slot away from the leg placement slot is rotatably connected to a foot pedal, a spring telescopic rod is rotatably connected to the lower surface of the foot pedal, and the bottom end of the spring telescopic rod is rotatably connected to the extension slot; A plurality of limit strips or limit blocks are fixedly mounted on the upper surface of one end of the base away from the foot pedal; Furthermore, matching pad holes are respectively provided on both sides of the other end of the base, and the pad holes are arranged in a plurality of groups at intervals in the vertical direction, and the pad passes through the pad holes on both sides at the same time, and the end of the bottom plate overlaps the pad and hangs out of the base; Furthermore, two sides of the middle of the bottom plate are provided with a slide rail, and a latch hole is arranged in the middle array of the two slide rails; two sides of the lower middle of the mounting plate are fixedly connected with sliders adapted to the two slide rails, and the mounting plate slides on the bottom plate through the adaptation relationship between the sliders and the slide rails, and is limited by inserting a latch into the latch hole to slide; Furthermore, the bottom ends of the mounting plate are fixedly connected with rotating shafts extending vertically upward, and the ends of the adjacent two side walls of the leg placement grooves on both sides are fixedly connected with rotating shaft sleeves, and the rotating shaft sleeves are adapted to the rotating shafts; the two leg placement grooves are rotatably connected at one end of the middle part of the mounting plate through the adaptation relationship between the two rotating shafts and the rotating shaft sleeves respectively; Furthermore, the leg placement groove is a long groove structure with a U-shaped cross section, and two side walls are fixedly connected to the outside of the two slide rails; the cover plate is slidably installed on the leg placement groove through the two slide rails; the middle part of the cover plate is provided with an internal threaded tube running through the upper and lower parts, and the internal threaded tube is adapted to the threaded rod; Furthermore, a slide groove is fixedly installed in the middle of the mounting plate, the gear rotates in the middle of the slide groove, and the two racks are driven by the gear at the same time to slide in the slide groove respectively; Furthermore, a plurality of cushion blocks are fixedly installed under the bottom plate, and the cushion blocks fall on the base; Furthermore, the leg placement slot and the extension slot are relatively slid and then limited by a spring pin; the cover plate is slid on the leg placement slot and then limited by a latch pin; Furthermore, the mounting plate is extended to both sides and fixedly connected with a support plate, the lower surface of the support plate is attached to the bottom plate, and the upper surface is supported by the leg placement groove; Furthermore, a rotating handle is fixedly connected to the threaded rod; a stopper is fixedly connected to the end of the pad rod; Furthermore, symmetrical hollows are respectively provided on both sides of the foot pedal; The beneficial effects of the present invention are: The leg fixation device for pelvic tumor radiotherapy provided by the present invention is designed to stabilize the lower limbs and conveniently adjust the position and length to suit the structure of different patients, compared with the traditional method where the patient keeps the legs of the lower limbs fixed on their own or uses a soft cushion to provide comfort and support for the lower limbs. Specifically: The base plate is padded by pads of different heights to meet the need to raise both lower limbs within a certain angle range; the leg restraint mechanism follows the mounting plate to slide on the base plate, that is, it can slide to different positions of the patient's lower limbs, so that the leg placement grooves can padded and place the patient's lower limbs at the knees; the pressure grooves are replaceable structures, and can be replaced with pressure grooves of different sizes and specifications to accommodate patients with different thicknesses and knee heights.

[0007] The extension groove and the leg placement groove form a telescopic structure, so that the foot pedal can directly contact and support the sole of the patient's foot through telescoping; and cooperate with a restraint belt or strap inserted into the hollow to restrain and fix the sole of the patient's foot, thereby limiting the rotation of the patient's bilateral lower limbs.

[0008] The base is provided with a limiting strip and a limiting block for fixing the relative position with the vacuum pad, and is used in conjunction with a vacuum pad commonly used in radiotherapy to enhance the stability of the positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0010] Figure 1 It is a schematic diagram of the overall structure of the present invention from one perspective; Figure 2 It is a schematic diagram of the overall structure of the present invention from another perspective; Figure 3 is a top view of the present invention; Figure 4 is a structural schematic diagram of the base and the bottom plate of the present invention; Figure 5 is a schematic structural diagram of the leg restraint mechanism of the present invention; Figure 6 The present invention Figure 1 A schematic diagram of the enlarged local structure at point A in the middle; Figure 7 The present invention Figure 1 A magnified schematic diagram of the local structure at B in the middle; Figure 8 The present invention Figure 3 A magnified schematic diagram of the local structure at C in the middle; Fig. 9 The present invention Figure 4 A magnified schematic diagram of the local structure at D in the middle; Fig.10 is a schematic structural diagram of the base of the present invention; In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1-base, 101-pad, 102-pad hole, 103-stopper, 104-extension plate, 105-limiting block, 106-limiting strip, 2-bottom plate, 201-slide rail one, 202-pin hole one, 203-pad, 3-mounting plate, 301-slider, 302-rotating shaft, 303-slide groove, 304-supporting plate, 4-leg restraint mechanism, 401-leg groove, 402-cover plate, 403-pressing groove, 404-threaded rod, 405-extension groove, 406-sleeve, 407-foot pedal, 408-spring telescopic rod, 409-rotating shaft sleeve, 4010-slide rail two, 4011-internal threaded tube, 4012-handle, 4013-hollow, 5-opening mechanism, 501-gear, 502-rack. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0012] See also Figure 1-Figure 10 In this embodiment, a leg fixation device for pelvic tumor radiotherapy includes: a base 1, a bottom plate 2, a mounting plate 3, a leg restraint mechanism 4, and a spreading mechanism 5; the base 1 is a component for stably placing and establishing a rigid connection with a vacuum pad, and the mounting plate 3 is a structure for installing the leg restraint mechanism 4 and driving the leg restraint mechanism 4 to rotate relative to the bottom plate 2; the spreading mechanism 5 is a component for spreading the two leg restraint mechanisms 4 and limiting the position.

[0013] In this embodiment, one end of the bottom plate 2 is rotatably connected to one end of the base 1, and the other end is supported by the pad 101 to form an angle with the base 1; that is, by adjusting the height of the pad 101, the angle of the bottom plate 2 is adjusted; In this embodiment, a mounting plate 3 is slidably mounted on the bottom plate 2, and a leg restraint mechanism 4 is rotatably mounted on the upper sides of the mounting plate 3; an opening mechanism 5 is fixedly mounted on the middle part of the mounting plate 3, and the opening mechanism 5 is a gear 501 rack 502 mechanism, including a gear 501, and two racks 502 meshing with the gear 501 at the same time, and the bidirectional movement of the gear 501 drives the two racks 502 to approach or move away from each other; the two outer ends of the two racks 502 that are away from each other are rotatably connected to a leg restraint mechanism, and the bidirectional rotation of the gear 501 drives the two leg restraint mechanisms 4 to open or gather; In this embodiment, the leg restraint mechanism 4 includes a leg placement groove 401, a cover plate 402, a pressing groove 403, a threaded rod 404, and an extension groove 405; the cover plate 402 is slidably mounted on the leg placement groove 401, and a threaded rod 404 is spirally connected to the middle part, the threaded rod 404 passes through the cover plate 402 in the vertical direction, and a sleeve 406 is rotatably connected to the bottom, and an inverted U-shaped pressing groove 403 is sleeved in the sleeve 406, and the rotation of the threaded rod 404 drives the pressing groove 403 to slide up and down under the cover plate 402; In this embodiment, the extension slot 405 is slidably connected with the leg placement slot 401 to form a telescopic slot plate structure, and the end of the extension slot 405 away from the leg placement slot 401 is rotatably connected to a foot pedal 407, and a spring telescopic rod 408 is rotatably connected to the lower surface of the foot pedal 407, and the bottom end of the spring telescopic rod 408 is rotatably connected to the extension slot 405; a plurality of limit strips 106 or limit blocks 105 are fixedly installed on the upper surface of the end of the base away from the foot pedal 407; because a vacuum pad may be used to fix the upper body during radiotherapy, and the positioning process needs to keep the vacuum pad relatively fixed to the device, combined with the characteristic that the vacuum pad can be arbitrarily plastic, a limit strip 106 or a limit block 105 is set, and the vacuum pad is placed thereon, and after the vacuum pad is shaped, it is limited and fixed by the limit strip 106 and the limit block 105, so as to achieve relative fixation of the vacuum pad and the device; In this embodiment, matching pad holes 102 are respectively opened on both sides of the other end of the base 1, and the pad holes 102 are arranged in a plurality of groups at intervals in the vertical direction. The pad 101 passes through the pad holes 102 on both sides at the same time, and the end of the bottom plate 2 overlaps the pad 101 and hangs out of the base 1; the interval arrangement relationship of the pad holes 102 establishes a correlation between the angle between the bottom plate 2 relative to the base 1 and the pad holes 102; In this embodiment, two sides of the upper middle portion of the bottom plate 2 are provided with slide rails 201, and the middle arrays of the two slide rails 201 are provided with latch holes 202; two sides of the lower middle portion of the mounting plate 3 are fixedly connected with sliders 301 adapted to the two slide rails, and the mounting plate 3 slides on the bottom plate 2 through the adaptation relationship between the sliders 301 and the slide rails, and is limited by inserting latches into the latch holes to slide; In this embodiment, the bottom ends of the mounting plate 3 are fixedly connected with rotating shafts 302 extending vertically upward, and the ends of the adjacent two side walls of the leg placement grooves 401 on both sides are fixedly connected with rotating shaft sleeves 409406, and the rotating shaft sleeves 409406 are adapted to the rotating shaft 302; the two leg placement grooves 401 are rotatably connected at one end of the middle part of the mounting plate 3 through the adaptation relationship between the two rotating shafts 302 and the rotating shaft sleeves 406; In this embodiment, the leg placement slot 401 is a long slot structure with a U-shaped cross section, and two side walls are fixedly connected to the outside of the two slide rails 4010; the cover plate 402 is slidably installed on the leg placement slot 401 through the two slide rails 4010; the middle part of the cover plate 402 is provided with an internal threaded tube 4011 that passes through from top to bottom, and the internal threaded tube 4011 is adapted to the threaded rod 404; In this embodiment, a slide groove 302 is fixedly installed in the middle of the mounting plate 3, the gear 501 rotates in the middle of the slide groove 302, and the two racks 502 are driven by the gear 501 at the same time and slide in the slide groove 302 respectively; In this embodiment, a plurality of cushion blocks 203 are fixedly installed under the base 1, and the cushion blocks 203 fall on the base 1; In this embodiment, the leg placement slot 401 and the extension slot 405 slide relative to each other and are limited by a spring 408 pin; the cover plate 402 slides on the leg placement slot 401 and is limited by a latch pin; In this embodiment, the mounting plate 3 extends to both sides and is fixedly connected with a support plate 304, the lower surface of the support plate 304 is attached to the bottom plate 2, and the upper surface supports the leg placement groove 401; the support plate 304 and the structure that prevents the leg restraint mechanism 4 from being suspended in the air enable the leg restraint mechanism 4 to be stably placed on the bottom plate 2 and rotate with the bottom plate 2; In this embodiment, a rotating handle 4012 is fixedly connected to the threaded rod 404; a stopper 103 is fixedly connected to the end of the pad rod; the stopper 103 is a mechanism for limiting the pad rod from extending too deep into the pad hole 102, thereby ensuring that the pad 101 stably supports the bottom plate 2; In this embodiment, symmetrical hollows 4013 are respectively provided on both sides of the foot pedal 407; the hollows 4013 are used to install or connect restraint belts, and fix the patient's feet by binding to prevent displacement of the feet; In this embodiment, the specific use process of a leg fixation device for pelvic tumor radiotherapy is as follows: After the various components of the device are assembled and installed according to the diagram and the above text description, the patient's bilateral lower limbs are placed in the leg placement slots 401 respectively, the cover plate 402 is slid above the patient's knees, the threaded rod 404 is rotated by the handle 4012 to lower the tooth socket to achieve compression and fixation of the patient's bilateral lower limbs from the knee position, and the extension slot 405 is installed at the same time to place the patient's feet on the foot pedal 407, and the restraint belt is connected through the hollow 4013 to fix the patient's feet; the fixation of the patient's bilateral lower limbs is achieved by fixing the knees and the soles of the feet.

[0014] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A leg fixation device for pelvic tumor radiotherapy, characterized in that: include: Base, bottom plate, mounting plate, leg restraint mechanism, opening mechanism; One end of the bottom plate is rotatably connected to one end of the base, and the other end is supported by a pad and forms an angle with the base; A mounting plate is slidably mounted on the bottom plate, and a leg restraint mechanism is rotatably mounted on the upper sides of the mounting plate; an opening mechanism is fixedly mounted on the middle of the mounting plate, and the opening mechanism is a gear rack mechanism, including a gear and two racks meshing with the gear at the same time, and the two-way movement of the gear drives the two racks to approach or move away from each other; the two outer ends of the two racks that are away from each other are rotatably connected to a leg restraint mechanism, and the two leg restraint mechanisms are driven to open or converge by the two-way rotation of the gear; The leg restraint mechanism comprises a leg placement groove, a cover plate, a pressure groove, a threaded rod, and an extension groove; the cover plate is slidably mounted on the leg placement groove, and a threaded rod is spirally connected to the middle portion, the threaded rod passes through the cover plate in the vertical direction, and a sleeve is rotatably connected to the bottom, an inverted U-shaped pressure groove is sleeved in the sleeve, and the rotation of the threaded rod drives the pressure groove to slide up and down under the cover plate; The extension slot is slidably connected with the leg placement slot to form a telescopic slot plate structure, the end of the extension slot away from the leg placement slot is rotatably connected to a foot pedal, a spring telescopic rod is rotatably connected to the lower surface of the foot pedal, and the bottom end of the spring telescopic rod is rotatably connected to the extension slot; A plurality of limiting strips or limiting blocks are fixedly mounted on the upper surface of one end of the base away from the foot pedal.

2. A leg fixation device for pelvic tumor radiotherapy according to claim 1, characterized in that: Matching pad holes are respectively opened on both sides of the other end of the base, and the pad holes are arranged in a plurality of groups at intervals in the vertical direction. The pad passes through the pad holes on both sides at the same time, and the end of the bottom plate overlaps the pad and hangs out of the base.

3. A leg fixation device for pelvic tumor radiotherapy according to claim 1, characterized in that: A slide rail is provided on both sides of the middle part of the base plate, and a latch hole is provided in the middle array of the two slide rails. Slide blocks compatible with the two slide rails are fixedly connected on both sides of the lower middle part of the mounting plate. The mounting plate slides on the base plate through the matching relationship between the slide blocks and the slide rails, and is limited by inserting a latch into the latch hole to slide.

4. A leg fixation device for pelvic tumor radiotherapy according to claim 1, characterized in that: The two sides of the bottom end of the mounting plate are fixedly connected with a rotating shaft extending vertically upward, and the ends of the adjacent two side walls of the leg placement grooves on both sides are fixedly connected with a rotating shaft sleeve, and the rotating shaft sleeve is adapted to the rotating shaft; the two leg placement grooves are rotatably connected at one end of the middle part of the mounting plate through the adaptation relationship between the two rotating shafts and the rotating shaft sleeves.

5. A leg fixation device for pelvic tumor radiotherapy according to claim 1, characterized in that: The leg placement groove is a long groove structure with a U-shaped cross-section, and two side walls are fixedly connected to the outside with two slide rails; the cover plate is slidably installed on the leg placement groove through the two slide rails; the middle part of the cover plate is provided with an internal threaded tube running through it from top to bottom, and the internal threaded tube is adapted to the threaded rod.

6. A leg fixation device for pelvic tumor radiotherapy according to claim 1, characterized in that: A slide groove is fixedly installed in the middle of the mounting plate, the gear rotates in the middle of the slide groove, and the two racks are driven by the gear at the same time to slide in the slide groove respectively.

7. A leg fixation device for pelvic tumor radiotherapy according to claim 1, characterized in that: A plurality of cushion blocks are fixedly installed under the base, and the cushion blocks fall on the base.

8. A leg fixation device for pelvic tumor radiotherapy according to claim 1, characterized in that: The leg placement groove and the extension groove are relatively slid and then limited by a spring pin; and the cover plate is slid on the leg placement groove and then limited by a latch pin.

9. A leg fixation device for pelvic tumor radiotherapy according to claim 1, characterized in that: The mounting plate is extended to both sides and fixedly connected with a pad, the lower surface of the pad is attached to the bottom plate, and the upper surface supports the leg placement groove.

10. A leg fixation device for pelvic tumor radiotherapy according to claim 1, characterized in that: A rotating handle is fixedly connected to the threaded rod; a stopper is fixedly connected to the end of the pad rod; and symmetrical hollows are respectively provided on both sides of the foot pedal.

Images