A device for collecting and fixing blood from a vein below the calf of a tumor patient and a method of use thereof

Abstract

The present invention discloses a venous blood sampling and fixing device below the calf of a tumor patient and a method of use, belonging to the technical field of medical auxiliary devices. The device includes a first plate body, and a first hydraulic rod and a second hydraulic rod are arranged at intervals below the first plate body. It is characterized in that a telescopic plate group is hinged at one end of the first plate body, and the bottom of the telescopic plate group is connected to the second plate body. The first hydraulic rod and the second hydraulic rod are placed on the second plate body. The solution of the present invention can effectively stabilize the limbs, reduce the difficulty of blood sampling from the lower limbs, and improve the success rate of blood sampling and the comfort of the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary devices, and in particular to a device for fixing blood sampling from a vein below the calf of a tumor patient and a method for using the device. Background Art

[0002] Currently, in clinical treatment, cancer patients undergoing long-term chemotherapy or infusion therapy often experience vascular sclerosis, occlusion, edema, or infection due to repeated punctures in the upper limb veins, making them difficult to use. In these cases, lower limb veins, such as the great and small saphenous veins, are often used for blood sampling or infusion.

[0003] There are many difficulties in venous blood collection below the calf. First, it is difficult for patients to keep their legs stable during blood collection, and involuntary movement of the legs can easily lead to blood collection failure, increasing the patient's pain. Secondly, the veins in this area are relatively thin and deep, with complex anatomical structures, such as a thick fat layer and curved veins. Patients may also have problems such as lower limb edema and fragile skin. Precise positioning is required for blood collection, and traditional blood collection methods make it difficult to ensure that the needle accurately penetrates the vein. In addition, patients will feel uncomfortable if they maintain a specific posture for a long time, especially for cancer patients with weaker bodies. This not only affects the blood collection process, but may also cause other uncomfortable symptoms. Traditional tourniquets are only used for pressure application and cannot fix the angle and position of the limbs, and are prone to sliding; universal limb fixation plates are made of hard materials, have limited adjustment angles, lack adaptive designs for the calves, and cannot effectively stabilize the limbs, which can easily lead to puncture failure, hematoma or infection.

[0004] In response to the above problems, KR1020250039010A discloses a device for consistently starting to maintain the position of an object during colonoscopy. The device is a support member configured to support an object, and the support member may include a base surface, a first side that at least partially supports the thigh portion of the object and is connected to the base surface, and a support member that includes a second side that at least partially supports the calf portion of the object and is connected to the first side, and a prescribed channel between the first side and the second side; and the prior art US20240164970A1 discloses a surgical leg holder for manipulating a leg during surgery, which includes a frame that includes a proximal femoral portion, a joint, and a tibial portion distal to the joint, and the frame is capable of angular adjustment around the joint. The surgical leg fixator also includes one or more handles extending from the frame; and one or more fasteners for externally connecting at least a portion of the leg to fix the leg to the frame. However, the above prior arts still have much room for improvement in the application of blood sampling from the patient's leg. Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method for using venous blood sampling below the calf of a tumor patient. The solution of the present invention can effectively stabilize the limbs, reduce the difficulty of lower limb blood sampling, and improve the success rate of blood sampling and the patient's comfort.

[0006] To address the aforementioned technical problems, the present invention specifically provides the following technical solution: a device for securing a venous blood sample from the lower leg of a patient with a tumor, comprising a first plate, with first and second hydraulic rods spaced apart below the first plate. A telescopic plate assembly is hingedly connected at one end of the first plate, the bottom of the telescopic plate assembly being connected to the second plate, with the first and second hydraulic rods resting on the second plate. A suction cup is provided at the bottom of the second plate, and the first and second hydraulic rods are hingedly connected to the bottom of the first plate. The first and second hydraulic rods are configured to adjust the height and tilt angle of the first plate within a range of 0°-60° to accommodate various patient postures. When the first plate is raised or lowered, the telescopic plate assembly expands or contracts, ensuring a seamless connection with the second plate. The telescopic plate assembly, in conjunction with the first and second hydraulic rods, supports the first plate at multiple points. Specifically, the first and second hydraulic rods, along with the telescopic plate assembly, provide multi-point support at the bottom of the first plate. This effectively stabilizes the limb, limits the position of the limb during blood collection, and reduces the difficulty of blood collection for medical personnel and improves the success rate of blood collection.

[0007] According to one embodiment of the present invention, a placement frame and a placement base are arranged on the second plate. The placement frame and the placement base are used to place medical instruments, such as blood collection needles, syringes, disinfectants, tourniquets, etc., wherein the placement base can hold larger instruments and auxiliary positioning parts.

[0008] According to one embodiment of the present invention, a first limiter is provided on the first plate body. The first limiter includes a mounting base connected to the first plate body, a first hydraulic cylinder is symmetrically arranged on the mounting base, a first limiter base is provided on the upper portion of the first hydraulic cylinder, and first swing plates are rotatably connected to both ends of the first limiter base, and the bottom of the first swing plate is connected to the output end of the first hydraulic cylinder. The bottom of the first swing plate is hinged to the output end of the first hydraulic cylinder. The first limiter is made of medical rubber material, and the operation of the two first hydraulic cylinders is controlled to drive the displacement of the first swing plate, thereby clamping and limiting the limb and applying pressure. During this process, the first swing plate can limit micro-movements of the lower limb, reducing the risk of needle displacement caused by the patient's involuntary contraction. The entire clamping and pressurization process is achieved by controlling the first swing plate with the first hydraulic cylinder. The clamping force is controllable, achieving flexible clamping, thereby avoiding the compression pain at the edge of a traditional tourniquet.

[0009] According to one embodiment of the present invention, the upper portion of the first swing plate is rotatably connected to a second swing plate, which cooperates with the second swing plate to clamp the patient's lower limbs at multiple angles, wherein the second swing plate is rotatably connected and can rotate during contact with the patient's limbs, thereby self-adjusting the clamping surface to help adjust the regional pressure of the entire first limit member on the clamping part of the patient's lower limbs, thereby avoiding venous flattening caused by excessive compression.

[0010] According to one embodiment of the present invention, the first swinging plates are arranged in an array with intervals between them. The number of second swinging plates is the same as that of the first swinging plates, and they are connected to each other via a rotating shaft. A limiting link is connected between the second swinging plates. The array arrangement of the first swinging plates disperses the clamping force, thereby preventing the edge-compression pain associated with traditional tourniquets. The second swinging plates are connected to the first swinging plates via a rotating shaft, enabling automatic self-adjustment of the clamping surface after clamping. The limiting link prevents the second swinging plates from excessive rotation.

[0011] The second swing plate is an arc-shaped bending structure, and the middle part of the arc-shaped structure is connected to the first swing plate through a rotating shaft. At least two reinforcing connecting rods are connected between the second swing plates. The reinforcing connecting rods are preferably located at the ends of the second swing plates to reinforce the adjacent second swing plates and maintain the shape of the second swing plates.

[0012] The first position-limiting frame is composed of spaced-apart plates connected by rods. A vertical mounting reinforcement plate is positioned in the middle of the first position-limiting frame. The first plate is provided with a mounting slot capable of accommodating the mounting reinforcement plate, within which the mounting reinforcement plate can slide. The mounting reinforcement plate enhances the overall structural strength of the first position-limiting frame and, in conjunction with the mounting slot, assists the sliding motion of the first plate on the slide rail. Furthermore, the mounting reinforcement plate maintains symmetry between the first hydraulic cylinders on both sides.

[0013] According to one embodiment of the present invention, a slide rail is provided on the first plate, and a slider matched with the slide rail is provided at the bottom of the mounting base plate for adjusting the position. The position is adjusted for patients with different leg lengths to improve the comfort of the patients.

[0014] According to one embodiment of the present invention, the telescopic plate assembly includes a first telescopic plate connected to a second plate body, the first telescopic plate having an upper opening and an internally displaceable second telescopic plate, the second telescopic plate having an upper opening and an internally displaceable third telescopic plate, the end of the third telescopic plate being hinged to a connecting rod, and the connecting rod being disposed below the first plate body. The first telescopic plate of the telescopic plate assembly is provided with a second telescopic plate capable of sliding and telescoping relative thereto, and a further third telescopic plate, which is used to expand the telescopic range of the telescopic plate assembly and provide buffer support for the lower end of the first plate body. If a patient's foot is suddenly placed on the first plate body, the end of the foot may bear an instantaneous excessive load. The presence of the telescopic plate assembly can prevent the end of the first plate body from rapidly deforming downward in such a situation. In this way, the telescopic plate assembly cooperates with the first hydraulic rod and the second hydraulic rod to provide support for multiple points of the first plate body.

[0015] According to one embodiment of the present invention, an auxiliary positioning member is magnetically attached to the side of the retractable plate assembly. The auxiliary positioning member comprises a magnetic plate, on which a lighting lamp is mounted. The lighting lamp can be a wired lamp or a battery-powered lamp. Other equipment can also be mounted on the magnetic plate, such as a medical subcutaneous vein imaging device to assist in visualizing the location of a patient's leg vein during blood sampling. The magnetic plate can be freely positioned according to needs. Furthermore, an extension plate is provided at the edge of the magnetic plate, with holes provided in the extension plate for easy installation and use.

[0016] According to one embodiment of the present invention, the surface of the second plate is connected to one end of a first support rod, the other end of which is connected to the telescopic plate assembly. The first support rod's end is connected to the first telescopic plate of the telescopic plate assembly, and a first elastic support block is provided between the first support rod and the first telescopic plate. The first support rod and the first support block are provided to ensure perpendicularity between the telescopic plate assembly and the second plate. This reduces the probability of relative deformation of the second plate, thereby reducing the possibility of angular deviation between the second plate and the first hydraulic rod, thereby ensuring effective support for the upper first plate.

[0017] A first stopper is provided on the second plate, the first stopper being adjacent to the second hydraulic rod and being detachably connected to the second plate, with one side of the first stopper contacting the side of the second hydraulic rod. The first stopper is provided to ensure the verticality of the second hydraulic rod relative to the second plate.

[0018] A method for using a device for collecting blood from a vein below the calf of a tumor patient is as follows:

[0019] Step 1: Adjust the height of the first hydraulic rod and the second hydraulic rod to adjust the height of the first plate;

[0020] Step 2: Adjust the height difference between the first hydraulic rod and the second hydraulic rod to adjust the inclination angle of the first plate;

[0021] Step 3: Place the patient's limb on the first plate for blood collection. During the placement process, the first limiting component clamps and limits the patient's leg. Before placing the limb, choose whether to use the second limiting component, auxiliary support plate, and auxiliary positioning component according to the condition of the patient's leg.

[0022] The first hydraulic cylinder, the first hydraulic rod and the second hydraulic rod of the first position-limiting member of the present invention are all equipped with corresponding control buttons.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention has a first hydraulic rod and a second hydraulic rod and a multi-point support of a telescopic plate group at the bottom of the first plate body, which can effectively stabilize the limbs. After limiting the limbs during the blood collection process, the difficulty of blood collection for medical staff is reduced and the success rate of blood collection is improved. The first plate body is provided with a first limiter, a second limiter, an auxiliary support plate, and an auxiliary positioning member to assist medical staff in performing blood collection operations. The solution of the present invention can effectively stabilize the limbs, reduce the difficulty of lower limb blood collection, improve the success rate of blood collection and the comfort of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0025] Figure 1 This is a schematic diagram of a device for collecting and fixing blood from a vein below the calf of a tumor patient according to the present invention;

[0026] Figure 2 Schematic diagram of the connection between the second plate and the first support rod of the present invention;

[0027] Figure 3 This is a schematic diagram of the connection scheme between the auxiliary positioning member and the telescopic plate group of the present invention;

[0028] Figure 4 Schematic diagram of the second position-limiting member solution of the present invention;

[0029] Figure 5 This is a schematic structural diagram of the first position-limiting member of the present invention;

[0030] Figure 6 It is a side view of the first limiting member of the present invention;

[0031] Figure 7 This is a schematic diagram of the partial structure of the first position-limiting member of the present invention;

[0032] Figure 8It is a schematic diagram of the connection scheme between the auxiliary support plate and the first plate body of the present invention.

[0033] Explanation of reference numerals: 10. First plate; 11. Mounting groove; 12. Slide rail; 13. Bending plate; 20. Second plate; 21. First hydraulic rod; 22. Second hydraulic rod; 23. Placement frame; 24. First stopper; 25. Placement base plate; 30. Telescopic plate group; 31. Connecting rod; 32. First telescopic plate; 33. Second telescopic plate; 34. First support block; 35. First support rod; 36. Third telescopic plate; 40. First limit member; 41. First Limiting base frame; 42. First swing plate; 43. Second swing plate; 44. First hydraulic cylinder; 45. Installing reinforcement plate; 46. Installing base plate; 47. Reinforcement connecting rod; 48. Rotating shaft; 49. Limiting connecting rod; 50. Second limiting member; 51. Installing base plate; 52. Limiting base block; 53. Fastener; 54. Anti-slip pad; 55. First through groove; 60. Auxiliary support plate; 61. Connecting extension plate; 70. Auxiliary positioning member; 71. Lighting lamp; 72. Magnetic plate. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0035] The following first describes the concepts involved in this application with reference to the accompanying drawings. It should be noted that the following description of each concept is intended only to make the content of this application easier to understand and does not limit the scope of protection of this application. At the same time, the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict. The following detailed description of this application will be made with reference to the accompanying drawings and in conjunction with the embodiments.

[0036] Example 1:

[0037] Attached picture Figure 1 -Attached Figure 8As shown, the present invention provides a device for securing a venous blood sample from the lower leg of a tumor patient. The device comprises a first plate 10, with a first hydraulic rod 21 and a second hydraulic rod 22 spaced apart below the first plate 10. A telescopic plate assembly 30 is hingedly connected to one end of the first plate 10, the bottom of which is connected to the second plate 20. The first and second hydraulic rods 21 and 22 are positioned on the second plate 20. A suction cup is provided at the bottom of the second plate 20. The first and second hydraulic rods 21 and 22 are hingedly connected to the bottom of the first plate 10. The first and second hydraulic rods 21 and 22 can adjust the height and tilt angle of the first plate 10 within a range of 0°-60° to accommodate different sitting or lying postures of the patient. When the first plate body 10 is raised or lowered or tilted, the telescopic plate group 30 can be telescopically expanded or contracted to ensure that it is always seamlessly connected with the second plate body 20. The telescopic plate group 30 cooperates with the first hydraulic rod 21 and the second hydraulic rod 22 to form multi-point support for the first plate body 10, that is, there are multi-point supports of the first hydraulic rod 21 and the second hydraulic rod 22 and the telescopic plate group 30 at the bottom of the first plate body 10, which can effectively stabilize the limbs, limit the limbs during the blood collection process, reduce the difficulty of blood collection for medical staff and improve the success rate of blood collection.

[0038] The second plate 20 is provided with a placement frame 23 and a placement base 25. The placement frame 23 and the placement base 25 are used to place medical instruments, such as blood collection needles, syringes, disinfectants, tourniquets, etc., wherein the placement base 25 can place larger instruments and can also place auxiliary positioning members 70.

[0039] A first stopper 40 is mounted on the first plate 10. The stopper 40 includes a mounting base 46 connected to the first plate 10. A first hydraulic cylinder 44 is symmetrically mounted on the mounting base 46. A first stopper base 41 is mounted above the first hydraulic cylinder 44. First swing plates 42 are pivotally connected to each end of the first stopper base 41. The bottom of the first swing plate 42 is connected to the output end of the first hydraulic cylinder 44. The bottom of the first swing plate 42 is hingedly connected to the output end of the first hydraulic cylinder 44. The first stopper 40 is made of medical rubber. Controlling the operation of the two first hydraulic cylinders 44 drives the displacement of the first swing plates 42, thereby clamping and applying pressure to the limb. During this process, the first swing plates 42 limit micro-movements of the lower limb, reducing the risk of needle displacement caused by involuntary contractions. The entire clamping and pressurization process is achieved by the first hydraulic cylinder 44 controlling the first swing plate 42, providing controllable clamping force and achieving flexible clamping, thus avoiding the pain and pressure caused by the edges of traditional tourniquets.

[0040] The upper part of the first swing plate 42 is rotatably connected to the second swing plate 43, which cooperates with the second swing plate 43 to clamp the patient's lower limbs at multiple angles. The second swing plate 43 is a rotatable connection, which can rotate during the contact with the patient's limbs, and then the self-adjusting clamping surface helps to adjust the regional pressure of the entire first limit member 40 on the clamping part of the patient's lower limbs, thereby avoiding venous flattening caused by excessive compression.

[0041] The first swinging plates 42 are arranged in an array, with the same number of second swinging plates 43 as the first swinging plates 42. The second swinging plates 43 are connected to the first swinging plates 42 via a rotating shaft 48. A limiting link 49 is connected between the second swinging plates 43. The array arrangement of the first swinging plates 42 disperses the clamping force, thereby preventing the edge-compression pain associated with traditional tourniquets. The connection between the second swinging plates 43 and the first swinging plates 42 via the rotating shaft 48 enables automatic self-adjustment of the clamping surface after clamping. The limiting link 49 prevents the second swinging plates 43 from excessive rotation.

[0042] The second swing plate 43 is an arc-shaped bending structure, and the middle part of the arc-shaped structure is connected to the first swing plate 42 through a rotating shaft 48. At least two reinforcing links 47 are connected between the second swing plates 43. The reinforcing links 47 are preferably located at the ends of the second swing plates 43 to reinforce the adjacent second swing plates 43 and maintain the shape of the second swing plates 43.

[0043] The first position-limiting frame 41 is composed of spaced-apart plates connected by rods. A vertical mounting reinforcement plate 45 is disposed in the middle of the first position-limiting frame 41. The first plate 10 is provided with a mounting slot 11 capable of accommodating the mounting reinforcement plate 45, within which the mounting reinforcement plate 45 can slide. The mounting reinforcement plate 45 not only enhances the overall structural strength of the first position-limiting frame 41 but also cooperates with the mounting slot 11 to assist the sliding movement of the first plate 10 on the slide rail 12. Furthermore, the mounting reinforcement plate 45 maintains symmetry between the first hydraulic cylinders 44 on both sides.

[0044] A slide rail 12 is provided on the first plate 10 , and a slider matched with the slide rail 12 is provided at the bottom of the mounting base 46 for adjusting the position. The position can be adjusted for patients with different leg lengths to improve the comfort of the patients.

[0045] The telescopic plate assembly 30 includes a first telescopic plate 32 connected to the second plate body 20. The first telescopic plate 32 has an opening at the top and houses a second telescopic plate 33, which is displaceable. The second telescopic plate 33 has an opening at the top and houses a third telescopic plate 36, which is displaceable. The end of the third telescopic plate 36 is hingedly connected to a connecting rod 31, which is located below the first plate body 10. The second telescopic plate 33 and the third telescopic plate 36, which are arranged on the first telescopic plate 32 of the telescopic plate assembly 30 and can slide and extend relative to the first telescopic plate 32, are used to expand the telescopic range of the telescopic plate assembly 30 and provide cushioning support for the lower end of the first plate body 10. In the event that a patient's foot is suddenly placed on the first plate body 10 and the foot bears an excessive amount of weight, the telescopic plate assembly 30 prevents the end of the first plate body 10 from rapidly deforming downward in such a situation. In this way, the telescopic plate assembly 30 cooperates with the first and second hydraulic rods 21 and 22 to provide support for the first plate body 10 at multiple points.

[0046] Auxiliary positioning members 70 are magnetically attached to the side of the telescopic plate assembly 30. These members include a magnetic plate 72, on which a light 71 is mounted. Light 71 can be either a wired light or a battery-powered one. Other devices can also be mounted on the magnetic plate 72, such as medical subcutaneous vein imaging equipment, to assist in visualizing the location of veins in a patient's leg during blood sampling. The magnetic plate 72 can be positioned freely as needed. An extension plate is provided at the edge of the magnetic plate 72, with holes provided for easy installation.

[0047] One end of a first support rod 35 is connected to the surface of the second plate 20, and the other end of the first support rod 35 is connected to the telescopic plate assembly 30. The first support rod 35 is connected to the first telescopic plate 32 of the telescopic plate assembly 30. A first elastic support block 34 is positioned between the first support rod 35 and the first telescopic plate 32. The first support rod 35 and the first support block 34 ensure perpendicularity between the telescopic plate assembly 30 and the second plate 20. This reduces the probability of relative deformation of the second plate 20, thereby minimizing the possibility of angular misalignment between the second plate 20 and the first hydraulic rod 21, thereby ensuring effective support for the upper first plate 10.

[0048] A first stopper 24 is provided on the second plate 20. The first stopper 24 is disposed adjacent to the second hydraulic rod 22. The first stopper 24 and the second plate 20 are detachably connected, with one side of the first stopper 24 contacting the side of the second hydraulic rod 22. The first stopper 24 is provided to ensure the perpendicularity of the second hydraulic rod 22 relative to the second plate 20.

[0049] A method for using a device for collecting blood from a vein below the calf of a tumor patient is as follows:

[0050] Step 1: Adjust the height of the first hydraulic rod 21 and the second hydraulic rod 22 to adjust the height of the first plate 10;

[0051] Step 2: Adjust the height difference between the first hydraulic rod 21 and the second hydraulic rod 22 to adjust the tilt angle of the first plate 10;

[0052] Step 3: Place the patient's limb on the first plate 10 for blood collection. During the placement process, the first limiting member 40 clamps and limits the patient's leg. Before placing the limb, choose whether to use the second limiting member 50, auxiliary support plate 60, and auxiliary positioning member 70 according to the condition of the patient's leg.

[0053] The first hydraulic cylinder 44 of the first position-limiting member 40 of the present invention, as well as the first hydraulic rod 21 and the second hydraulic rod 22 are all equipped with corresponding control buttons.

[0054] Example 2:

[0055] This embodiment provides a further solution based on embodiment 1, see the attached specification. Figure 1 , Attachment Figure 8 As shown, a bent plate 13 is provided at the other end of the first plate body 10 away from the connecting rod 31, and an auxiliary support plate 60 is connected to the bent plate 13 through a connecting extension plate 61. The auxiliary support plate 60 has an anti-slip plate body relative to the end face of the first plate body 10, and the connecting extension plate 61 is connected to the back of the auxiliary support plate 60. The bottom end of the connecting extension plate 61 is connected to the bent plate 13 by a bolt. The bent plate 13 is a metal plate that can be adaptively deformed according to the force applied to the patient's foot. After the patient has finished using it, the bent plate 13 or the auxiliary support plate 60 can be adjusted to facilitate the next patient to obtain a more comfortable placement position. The patient's calf can use the auxiliary support plate 60 to provide auxiliary limiting support for the sole of its foot in the limited state, and cooperate with the first limiting member 4 0 forms a multi-point and multi-directional limiting support for the patient's calf, so that the probability of movement of the patient's calf due to various factors during the blood collection process is reduced, thereby improving the success rate of blood collection. In addition, during the blood collection process, the patient's foot can be supported by the limiting support through the foot. After the foot exerts force, it helps the muscle contraction to compress the vein, so that the blood return is temporarily blocked, the pressure in the vein increases, and the blood vessel is expanded, making it more obvious and easier to touch. In this way, the venous filling degree is increased and the blood vessel position is fixed to improve the puncture efficiency and patient comfort. Of course, it is necessary to adjust whether to use the auxiliary support plate 60 according to the condition of different patients. For example, if the patient has trauma on the sole of the foot, it is not recommended to install the auxiliary support plate 60 for auxiliary blood collection operations.

[0056] Example 3:

[0057] This embodiment provides a further solution based on embodiment 1, see the attached specification. Figure 1 , Attachment Figure 4As shown, a second limiter 50 is provided on the first plate body 10, and the second limiter 50 includes a mounting base plate 51 connected to the first plate body 10, a mounting hole is provided on the mounting base plate 51, and a hole corresponding to the mounting hole is provided on the first plate body 10, and the two are fastened by screws or bolts.

[0058] For special patients, when blood sampling from their calves needs to be completely restricted or venous sampling is difficult, the second limiting member 50 can serve as an auxiliary limiter for the patient's legs, minimizing the movement of the patient's legs during blood sampling, preventing the needle from coming out or blood vessel damage due to unconscious movement of the patient, such as muscle contraction or trembling, and ensuring stable blood sampling.

[0059] A limiting base block 52 is provided on the mounting base plate 51, and a through hole is opened on the limiting base block 52. The through hole passes through the two side surfaces of the limiting base block 52. The axial direction of the through hole is consistent with the placement direction of the patient's legs, and the through hole passes through the top of the limiting base block 52, so that the patient's legs are allowed to be placed in the through hole. A non-slip pad 54 is placed in the through hole. The non-slip pad 54 can reduce the slippage of the patient's legs, especially when sweating or there is liquid on the surface of the legs.

[0060] A fastener 53 is provided on one side of the limiting base block 52. The fastener 53 is a bolt structure and is arranged perpendicular to the axis of the through hole. A first through groove 55 is provided on the limiting base block 52. The first through groove 55 is arranged between the fastener 53 and the through hole. The fastener 53 can pass through the limiting base block 52 and contact the groove surface of the first through groove 55. The thickness of the limiting base block 52 between the first through groove 55 and the through hole is relatively small. After the fastener 53 rotates into the first through groove 55 and contacts the groove surface of the first through groove 55, it can cause the limiting base block 52 between the first through groove 55 and the through hole to deform to control the diameter of the through hole. In this embodiment, the material of the limiting base block 52 is medical rubber. Of course, other materials can also be used to manufacture the limiting base block 52 of the present invention.

[0061] The limiting base block 52 of the present invention can exert local pressure on the leg placed in the through hole under the design of the fastener 53 and the first through groove 55, providing moderate wrapping and compression of the distal end, that is, the part close to the foot area, so that the calf veins are temporarily congested and expanded, which is convenient for observation and touch positioning. For people with sensitive skin, the elastic wrapping can reduce the marks or pain caused by the tourniquet.

[0062] It should also be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and do not impose any form of limitation on the implementation methods of the technology of the present invention. Any person skilled in the art may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

[0064] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of this application, they can also make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A device for fixing blood sampling from a vein below the calf of a tumor patient, comprising a first plate (10), a first hydraulic rod (21) and a second hydraulic rod (22) being arranged below the first plate (10), characterized in that: A telescopic plate group (30) is hingedly connected to one end of the first plate body (10), the bottom of the telescopic plate group (30) is connected to the second plate body (20), and the first hydraulic rod (21) and the second hydraulic rod (22) are placed on the second plate body (20); A first position-limiting member (40) is provided on the first plate body (10), the first position-limiting member (40) includes a mounting base (46) connected to the first plate body (10), a first hydraulic cylinder (44) is symmetrically arranged on the mounting base (46), a first position-limiting base frame (41) is provided on the upper part of the first hydraulic cylinder (44), and first swing plates (42) are rotatably connected at both ends of the first position-limiting base frame (41), and the bottom of the first swing plate (42) is connected to the output end of the first hydraulic cylinder (44); The upper portion of the first swing plate (42) is rotatably connected to a second swing plate (43); The first swing plates (42) are arranged in an array at intervals, the number of the second swing plates (43) is the same as that of the first swing plates (42), the second swing plates (43) are connected to the first swing plates (42) via a rotating shaft (48), and the second swing plates (43) are connected to each other by a limiting connecting rod (49).

2. The device for collecting blood from a vein below the calf of a tumor patient according to claim 1, characterized in that: A placement frame (23) and a placement base (25) are arranged on the second plate (20).

3. The device for collecting blood from the vein below the calf of a tumor patient according to claim 1, characterized in that: A slide rail (12) is provided on the first plate body (10), and a slider matched with the slide rail (12) is provided at the bottom of the mounting base plate (46).

4. The device for collecting blood from a vein below the calf of a tumor patient according to claim 1, characterized in that: The telescopic plate group (30) comprises a first telescopic plate (32) connected to the second plate body (20), the first telescopic plate (32) having an upper opening and a second telescopic plate (33) disposed therein which can be displaced, the second telescopic plate (33) having an upper opening and a third telescopic plate (36) disposed therein which can be displaced, the end of the third telescopic plate (36) being hinged to a connecting rod (31), and the connecting rod (31) being disposed below the first plate body (10).

5. The device for collecting blood from a vein below the calf of a tumor patient according to claim 1, characterized in that: The telescopic plate group (30) is magnetically connected to an auxiliary positioning member (70) on the side thereof. The auxiliary positioning member (70) comprises a magnetic plate (72). An illuminating lamp (71) is arranged on the magnetic plate (72).

6. The device for collecting blood from a vein below the calf of a tumor patient according to claim 1, characterized in that: The surface of the second plate body (20) is connected to one end of the first support rod (35), and the other end of the first support rod (35) is connected to the telescopic plate group (30).

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