A tumor department prevents the skin red swelling of needle insertion place and stays needle auxiliary device

Abstract

The application discloses a tumor department-preventing-skin-swelling-at-needle-inserting-site indwelling needle auxiliary device, and relates to the technical field of medical devices, which comprises a first support frame, a cover plate, a fixed plate, an elastic clamping block, a fixed block, an indwelling needle and a first inclined frame, etc., the upper side of the first support frame is rotationally connected with the cover plate, the front side of the bottom of the cover plate is fixedly connected with the fixed plate, the rear side of the bottom of the cover plate is slidingly connected with the elastic clamping block used for clamping a heparin cap, the rear side of the bottom of the cover plate is fixedly connected with the fixed block, the indwelling needle is arranged between the elastic clamping block and the fixed block, and the rear side of the fixed plate is slidingly connected with the first inclined frame. The heparin cap is inserted between the elastic clamping block and the fixed block, the first clamping plate and the fixed plate clamp the catheter, then the inner needle tube is pinched, the inner needle is inserted into the patient's hand, the clamping effect is realized, and the catheter and the inner needle are prevented from moving to cause the skin swelling at the needle-inserting site.

Description

An indwelling needle support device for use in oncology to prevent redness and swelling at the needle insertion site. Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an indwelling needle auxiliary device for use in oncology to prevent redness and swelling of the skin at the needle insertion site. Background Technology

[0002] After performing surgery on patients with tumors, medical staff need to provide long-term intravenous infusion therapy. Therefore, it is necessary to insert an indwelling needle into the patient's hand. The indwelling needle consists of a heparin cap, a catheter, an inner needle tube, and an inner needle. During the process of inserting the inner needle into the patient's hand, the patient's hand is prone to movement, which can cause redness and swelling at the needle insertion site and cause discomfort to the patient. Therefore, an auxiliary device needs to be designed.

[0003] Patent application number CN215460938U discloses an indwelling needle auxiliary fixation device. The device involves inserting the needle into the patient's blood vessel and securing it with adhesive tape. The device is then worn on the arm, with rubber base plates A and B attached to the arm. A sliding lever is pressed down and slid, causing a limiting post to insert into a round hole on the surface of the fixing plate. A connector is placed into the Y-shaped groove at the top of rubber base plate A, and an extension tube is placed into the auxiliary fastening groove. Pulling the fastening tape adheres the adhesive to the skin, securing the connector. In use, the needle is first manually inserted, and then the indwelling needle is fixed to the patient's skin using the fastening tape. This method of use is prone to needle loosening during fixation, causing redness and swelling at the needle insertion site.

[0004] We designed an indwelling needle auxiliary device for use in oncology to prevent redness and swelling of the skin at the needle insertion site. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an indwelling needle auxiliary device for use in oncology to prevent redness and swelling of the skin at the needle insertion site, thereby overcoming the disadvantage that existing fixation devices easily cause redness and swelling of the skin at the needle insertion site during use.

[0006] To achieve the above objectives, the present invention provides the following solution: an indwelling needle auxiliary device for oncology to prevent skin redness and swelling at the needle insertion site, comprising:

[0007] The first support frame and the cover plate are rotatably connected to the upper side of the first support frame;

[0008] A fixing plate is fixedly connected to the bottom front side of the cover plate;

[0009] The cover plate has a flexible locking block that slides on the bottom rear side to lock the heparin cap in place.

[0010] A fixing block is fixedly connected to the rear side of the bottom inside the cover plate;

[0011] An indwelling needle is placed between the elastic clip and the fixing block;

[0012] The first inclined frame is slidably connected to the rear side of the fixed plate;

[0013] A first spring is fixedly connected between the first inclined frame and the fixed plate, and the first spring is wound around the fixed plate.

[0014] The first clamping plate is slidably connected to the fixed plate for clamping the conduit, and the first inclined frame is slidably connected to the first clamping plate;

[0015] The first connecting frame is fixedly connected to the lower side of the elastic block;

[0016] The swing arm is rotatably connected to both the left and right sides of the front part of the first connecting frame, and the swing arm is rotatably connected to the first inclined frame.

[0017] As improvements to the above solution, the following also include:

[0018] The second clamping plate is fixedly connected to the front of the first support frame;

[0019] The third splint is slidably connected to the lower side of the second splint for clamping the patient's hand;

[0020] The second inclined frame is slidably connected to the left side of the first support frame, and the cover plate is pressed together with the second inclined frame.

[0021] The first wedge block is slidably connected to the lower left side of the first support frame. The second inclined frame is pressed and engaged with the first wedge block, and the first wedge block is pressed and engaged with the third clamping plate.

[0022] As improvements to the above solution, the following also include:

[0023] The second spring is fixedly connected between the first wedge block and the first support frame, and the second spring is wound around the first support frame.

[0024] As an improvement to the above scheme, the upper part of the third clamping plate is arc-shaped.

[0025] As improvements to the above solution, the following also include:

[0026] Telescopic assembly: A telescopic assembly is fixedly connected to the top of the first inclined frame;

[0027] Connecting rod: A connecting rod is fixedly connected to the telescopic assembly;

[0028] Guide wheel: A guide wheel for guiding the conduit is rotatably connected to the lower front part of the connecting rod;

[0029] The top frame is fixedly connected to the middle of the top of the second clamping plate;

[0030] A lead screw is rotatably connected to the front side of the top frame;

[0031] The clamping blocks are threadedly connected to both sides of the lead screw, and the clamping blocks are slidably connected to the top frame.

[0032] As improvements to the above solution, the following also include:

[0033] A button is installed on the left side of the first support frame;

[0034] The pressing block is slidably connected to the upper side of the second inclined frame;

[0035] An ultraviolet lamp is installed on the upper front side of the cover plate to sterilize the needle insertion site on the patient's hand. The ultraviolet lamp is electrically connected to the button.

[0036] As improvements to the above solution, the following also include:

[0037] The third spring is fixedly connected between the pressing block and the second inclined frame, and the third spring is wound around the pressing block.

[0038] As improvements to the above solution, the following also include:

[0039] The second connecting frame is fixedly connected to the lower right side of the third clamping plate;

[0040] The second support frame is fixedly connected to the upper front side of the first support frame;

[0041] An expansion block for pressing down the inner needle tube is fixedly connected between the expansion block and the second support frame;

[0042] The first air cylinder is fixedly connected to the top of the second support frame on the right side;

[0043] The first piston rod is slidably connected to the right side of the first air cylinder;

[0044] Four springs: A fourth spring is fixedly connected between the first piston rod and the first air cylinder, and the fourth spring is wound around the first piston rod.

[0045] The second wedge block is fixedly connected to the right side of the first piston rod, and the second connecting frame is pressed together with the second wedge block;

[0046] The first air guide pipe connects the first air cylinder and the expansion block.

[0047] As an improvement to the above scheme, the lower part of the expansion block is toothed.

[0048] As improvements to the above solution, the following also include:

[0049] A pull rope is fixedly connected to the first inclined frame;

[0050] The top block is fixedly connected to the end of the pull rope;

[0051] The top plate is fixedly connected to the third clamping plate;

[0052] The second air cylinder is fixedly connected to the rear right side of the first support frame;

[0053] The second piston rod is slidably connected to the second air cylinder, and the top plate is fixedly connected to the second piston rod.

[0054] A sixth spring is fixedly connected between the second air cylinder and the second piston rod that slides on it, and the sixth spring is wound around the second piston rod;

[0055] An inflatable ring is fixedly connected to the rear side of the first support frame to secure the front side of the patient's hand;

[0056] Airbag, with an airbag connected to the inflation ring;

[0057] The second air tube connects the airbag and the second air cylinder.

[0058] The clamps are symmetrically and rotatably connected to the lower rear part of the first support frame;

[0059] A torsion spring is fixedly connected between the clamp and the first support frame, and the torsion spring is wound around the first support frame.

[0060] The advantages of this invention are: 1. This invention achieves the clamping effect by inserting the heparin cap between the elastic clip and the fixing block, clamping the catheter with the first clamp and the fixing plate, and then pinching the inner needle tube and inserting the inner needle into the patient's hand, thereby avoiding redness and swelling of the skin at the needle insertion site caused by the movement of the catheter and the inner needle.

[0061] 2. By passing the patient's hand between the second and third splints, the cover plate moves the second inclined frame downward, the first wedge block moves forward, and the third splint moves upward to fix the patient's hand, thereby achieving the effect of fixation and preventing the patient's hand from moving easily;

[0062] 3. The third clamp moves upward, causing the second connecting frame to move upward, thereby allowing the airflow in the first air cylinder to flow into the expansion block. The expansion block expands and presses down on the inner needle tube, thus achieving a pressing effect and preventing the inner needle tube from moving, so that the inner needle tube can be fixed later. Attached Figure Description

[0063] Figure 1 is a first-view perspective three-dimensional structural schematic diagram of the present invention;

[0064] Figure 2 is a schematic diagram of the second perspective three-dimensional structure of the present invention;

[0065] Figure 3 is a three-dimensional structural diagram of the fixing plate and the first connecting frame of the present invention.

[0066] Figure 4 is a three-dimensional structural diagram of the first clamping plate and the first spring of the present invention.

[0067] Figure 5 is a three-dimensional structural diagram of the elastic locking block and fixing block of the present invention;

[0068] Figure 6 is a three-dimensional structural diagram of the second and third clamping plates and other components of the present invention.

[0069] Figure 7 is a three-dimensional structural diagram of the second inclined frame and the second clamping plate of the present invention.

[0070] Figure 8 is a three-dimensional structural diagram of the second spring and the first wedge block of the present invention.

[0071] Figure 9 is a three-dimensional structural diagram of the connecting rod, telescopic assembly, and guide wheel of the present invention.

[0072] Figure 10 is a three-dimensional structural diagram of the top frame, lead screw, and clamping block of the present invention.

[0073] Figure 11 is a three-dimensional structural diagram of the ultraviolet lamp tube and button components of the present invention;

[0074] Figure 12 is a three-dimensional structural diagram of the third spring and pressing block of the present invention;

[0075] Figure 13 is a three-dimensional structural diagram of the second connecting frame and the second wedge block of the present invention.

[0076] Figure 14 is a three-dimensional structural diagram of the first air cylinder and the first air guide tube of the present invention.

[0077] Figure 15 is a three-dimensional structural diagram of the fourth spring and the first piston rod of the present invention.

[0078] Figure 16 is a three-dimensional structural diagram of the top plate, the second air cylinder, and the pull rope of the present invention.

[0079] Figure 17 is a three-dimensional structural diagram of the clips and torsion springs of the present invention;

[0080] Figure 18 is a three-dimensional structural diagram of the airbag and top block components of the present invention.

[0081] In the attached diagram, the following labels are used: 1-First support frame, 11-Indwelling needle, 12-Cover plate, 2-Fixing plate, 21-Elastic locking block, 22-First connecting frame, 23-Swing rod, 24-First inclined frame, 25-First clamping plate, 26-First spring, 27-Fixing block, 3-Second clamping plate, 31-Second inclined frame, 32-First wedge block, 33-Second spring, 34-Third clamping plate, 4-Connecting rod, 41-Telescopic assembly, 42-Guide wheel, 43-Top frame, 44-Clamping block, 45-Screw rod, 5-Purple External light tube, 51-button, 52-third spring, 53-pressing block, 6-second connecting frame, 61-second wedge block, 62-first air cylinder, 63-first air guide tube, 64-expansion block, 65-second support frame, 66-fourth spring, 67-first piston rod, 7-pull rope, 71-top block, 72-inflation ring, 73-second air guide tube, 74-airbag, 75-clamp, 76-second air cylinder, 77-top plate, 78-sixth spring, 79-second piston rod, 710-torsion spring. Detailed Implementation

[0082] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0083] Example 1: An indwelling needle auxiliary device for preventing skin redness and swelling at the needle insertion site in oncology, now referring to Figures 1-6, includes a first support frame 1, an indwelling needle 11, a cover plate 12, a fixing plate 2, an elastic locking block 21, a first connecting frame 22, a swing rod 23, a first inclined frame 24, a first clamping plate 25, a first spring 26, and a fixing block 27. The cover plate 12 is rotatably connected to the upper side of the first support frame 1. The fixing plate 2 is fixedly connected to the front side of the bottom of the cover plate 12. The elastic locking block 21 is slidably connected to the rear side of the bottom of the cover plate 12. The elastic locking block 21 is used to hold the heparin cap. The rear side of the bottom of the cover plate 12 is fixedly connected to... An indwelling needle 11 is placed between the fixed block 27, the elastic locking block 21, and the fixed block 27. The first inclined frame 24 is slidably connected to the rear side of the fixed plate 2. The first spring 26 is fixedly connected between the first inclined frame 24 and the fixed plate 2. The first spring 26 is wound around the fixed plate 2. The first clamping plate 25 is slidably connected to the fixed plate 2. The first clamping plate 25 is used to clamp the conduit. The first inclined frame 24 is slidably connected to the first clamping plate 25. The first connecting frame 22 is fixedly connected to the lower side of the elastic locking block 21. The left and right sides of the front of the first connecting frame 22 are rotatably connected to the swing rod 23. The swing rod 23 is rotatably connected to the first inclined frame 24.

[0084] When it is necessary to insert the indwelling needle 11 into a patient's hand, this oncology-grade indwelling needle 11 auxiliary device for preventing skin redness and swelling at the insertion site can be used. First, the device is placed in a suitable position. The cover plate 12 is rotated to open the first support frame 1. The patient's hand is then inserted into the first support frame 1 in a suitable position. The cover plate 12 is then manually rotated in the opposite direction to close the first support frame 1. The heparin cap is inserted between the elastic locking block 21 and the fixing block 27. The catheter is then passed between the first clamp 25 and the fixing plate 2, causing the elastic locking block 21 to deform adaptively and move downwards. This causes the first connecting frame 22 to move downwards, the swing rod 23 to rotate, causing the first inclined frame 24 to move backwards, the first spring 26 to be stretched, and the first clamp 25 to move to the right. The first clamp 25, moving to the right, limits the catheter of the indwelling needle 11, preventing it from wobbling during insertion. It also squeezes the catheter to restrict the flow rate of the chemotherapy drug, preventing excessive flow that could cause redness and swelling in the hand. Then, the patient holds the inner needle hub and inserts the inner needle into the disinfected area of ​​the patient's hand, using the indwelling needle 11. When the inner needle needs to be removed, the patient holds the inner needle hub and pulls it out. Then, the heparin cap is manually removed from between the elastic clip 21 and the fixing block 27, causing the first spring 26 to reset and move the first inclined frame 24 forward. Subsequently, the first clamp 25 moves to the left, the swing rod 23 rotates in the opposite direction, and the first connecting frame 22 and the elastic clip 21 move upward. Finally, the indwelling needle 11 auxiliary device for preventing redness and swelling at the insertion site, used in this oncology department, is placed in place.

[0085] Example 2: Based on Example 1, and referring to Figures 1, 2, 6-8, it further includes a second clamping plate 3, a second inclined frame 31, a first wedge block 32, a second spring 33, and a third clamping plate 34. The second clamping plate 3 is fixedly connected to the front of the first support frame 1. The third clamping plate 34 is slidably connected to the lower side of the second clamping plate 3. The upper part of the third clamping plate 34 is arc-shaped. The second inclined frame 31 is slidably connected to the left side of the first support frame 1. The cover plate 12 is pressed and engaged with the second inclined frame 31. The first wedge block 32 is slidably connected to the lower left side of the first support frame 1. The second inclined frame 31 is pressed and engaged with the first wedge block 32. The first wedge block 32 is pressed and engaged with the third clamping plate 34. The second spring 33 is fixedly connected between the first wedge block 32 and the first support frame 1. The second spring 33 is wound around the first support frame 1.

[0086] In the initial state, the second spring 33 is stretched, and the cover plate 12 contacts the second inclined frame 31. When the cover plate 12 rotates away from the second inclined frame 31, the second spring 33 resets and drives the first wedge block 32 to move backward, causing the second inclined frame 31 to move upward. Then, following the above steps, the patient's hand is inserted into the first support frame 1, so that the patient's hand passes between the second clamp 3 and the third clamp 34. When the cover plate 12 rotates in the opposite direction and contacts the second inclined frame 31, the cover plate 12 drives the second inclined frame 31 to move downward, thereby causing the first wedge block 32 to move forward. The second spring 33 is stretched, causing the third clamp 34 to move upward. The upward-moving third clamp 34 clamps the patient's hand, thereby achieving a clamping effect and preventing the patient's hand from moving easily during the insertion of the indwelling needle 11, which could cause the inner needle to move and cause redness and swelling of the hand skin. When the cover plate 12 rotates again to open the first support frame 1, the third clamp 34 moves downward away from the patient's hand.

[0087] Referring now to Figures 1, 2, 9, and 10, the device also includes a connecting rod 4, a telescopic assembly 41, a guide wheel 42, a top frame 43, a clamping block 44, and a lead screw 45. The top of the first inclined frame 24 is fixedly connected to the telescopic assembly 41, which consists of a telescopic rod and a spring. The top of the first inclined frame 24 is fixedly connected to the telescopic rod, and the connecting rod 4 is fixedly connected to the telescopic rod. A spring is fixedly connected between the telescopic rod and the connecting rod 4, and the spring is wound around the telescopic rod. The lower front part of the connecting rod 4 is rotatably connected to the guide wheel 42. The top of the second clamping plate 3 is fixedly connected to the top center, and the front of the top frame 43 is rotatably connected to the lead screw 45. The left and right sides of the lead screw 45 are threadedly connected to the clamping blocks 44, and the clamping blocks 44 are slidably connected to the top frame 43.

[0088] First, the screw 45 is rotated according to the diameter of the catheter, causing the clamps 44 to move accordingly. When the distance between the two clamps 44 is the diameter of the catheter, the screw 45 is released. Then, the catheter is moved around the guide wheel 42 and between the two clamps 44. The first inclined frame 24 moves forward, driving the telescopic component 41 forward, which in turn causes the connecting rod 4 and the guide wheel 42 to move forward. The forward-moving guide wheel 42 guides the catheter, making it taut. At the same time, the guide wheel 42 and the connecting rod 4 move adaptively, and the telescopic component 41 deforms adaptively to prevent the catheter from loosening and affecting the insertion of the indwelling needle 11. The first inclined frame 24 moves backward, driving the telescopic component 41 backward. The connecting rod 4 and the guide wheel 42 move backward, the telescopic component 41 resets, and the guide wheel 42 rotates in the opposite direction. When it is necessary to remove the indwelling needle 11, the catheter is moved away from the space between the guide wheel 42 and the two clamps 44.

[0089] Referring now to Figures 2, 11 and 12, the device also includes an ultraviolet lamp 5, a button 51, a third spring 52 and a pressing block 53. The button 51 is installed on the left side of the first support frame 1. The pressing block 53 is slidably connected to the upper side of the second inclined frame 31. The pressing block 53 contacts the button 51. The third spring 52 is fixedly connected between the pressing block 53 and the second inclined frame 31. The third spring 52 is wound around the pressing block 53. The ultraviolet lamp 5 is installed on the upper front side of the cover plate 12. The ultraviolet lamp 5 and the button 51 are electrically connected.

[0090] When the cover plate 12 rotates and contacts the second inclined frame 31, the cover plate 12 drives the second inclined frame 31 to move downward, thereby causing the pressing block 53 to move downward. When the pressing block 53 moves downward and contacts the button 51, the ultraviolet lamp 5 starts for three seconds and then turns off. The ultraviolet lamp 5 sterilizes the patient's hand where the indwelling needle 11 is inserted, thereby achieving the sterilization effect and preventing bacteria from remaining at the needle insertion site on the patient's hand. At the same time, when the pressing block 53 contacts the button 51, the third spring 52 is compressed, and the second inclined frame 31 moves upward. The third spring 52 resets, driving the pressing block 53 to move upward. The pressing block 53 moves upward and away from the button 51.

[0091] Referring now to Figures 1 and 2 and Figures 13-15, the system also includes a second connecting frame 6, a second wedge block 61, a first air cylinder 62, a first air guide pipe 63, an expansion block 64, a second support frame 65, a fourth spring 66, and a first piston rod 67. The second connecting frame 6 is fixedly connected to the lower right side of the third clamping plate 34. The second support frame 65 is fixedly connected to the upper front side of the first support frame 1. An expansion block 64 is fixedly connected between the second support frames 65. The first air cylinder 62 is fixedly connected to the top of the second support frame 65 on the right side. The first piston rod 67 is slidably connected to the right side of the first air cylinder 62. The fourth spring 66 is fixedly connected between the first piston rod 67 and the first air cylinder 62. The fourth spring 66 is wound around the first piston rod 67. The second wedge block 61 is fixedly connected to the right side of the first piston rod 67. The second connecting frame 6 and the second wedge block 61 are in a pressing fit. The first air guide pipe 63 connects the first air cylinder 62 and the expansion block 64.

[0092] After the catheter is passed around the guide wheel 42, the inner needle tube and the inner needle are passed around the underside of the expansion block 64. The third clamp 34 moves upward, causing the second connecting frame 6 to move upward, which in turn causes the second wedge block 61 to move to the left, causing the first piston rod 67 to move to the left. The fourth spring 66 is compressed, and the airflow in the first air cylinder 62 flows through the first air guide tube 63 to the expansion block 64. The expansion block 64 expands and presses down on the inner needle tube, pressing it against the patient's hand. This achieves the downward pressing effect, preventing the inner needle tube from moving easily, so that the inner needle tube and the catheter can be fixed to the patient's hand. The third clamp 34 moves downward, causing the second connecting frame 6 to move downward. The fourth spring 66 resets, causing the first piston rod 67 to move to the right, the second wedge block 61 to move to the right, and the expansion block 64 to contract.

[0093] Referring now to Figures 1, 16, 17, and 18, the system also includes a pull rope 7, a top block 71, an inflation ring 72, a second air duct 73, an airbag 74, a clamp 75, a second air cylinder 76, a top plate 77, a sixth spring 78, a second piston rod 79, and a torsion spring 710. The pull rope 7 is fixedly connected to the first inclined frame 24, and the end of the pull rope 7 is fixedly connected to the top block 71. The top plate 77 is fixedly connected to the third clamping plate 34. The second air cylinder 76 is fixedly connected to the rear right side of the first support frame 1, and the second piston rod 79 is slidably connected to the second air cylinder 76. The top plate 77 and the second piston rod 79 are connected to each other. 9. A sixth spring 78 is fixedly connected between the second air cylinder 76 and the second piston rod 79 that slides on it. The sixth spring 78 is wound around the second piston rod 79. An inflation ring 72 is fixedly connected to the rear side of the first support frame 1. An air bag 74 is connected to the inflation ring 72. A second air guide tube 73 is connected between the air bag 74 and the second air cylinder 76. A clamp 75 is symmetrically and rotatably connected to the lower rear part of the first support frame 1. The clamp 75 contacts the top block 71 and the air bag 74. A torsion spring 710 is fixedly connected between the clamp 75 and the first support frame 1. The torsion spring 710 is wound around the first support frame 1.

[0094] In the initial state, the torsion spring 710 undergoes torsional deformation, the first inclined frame 24 moves backward, pulling the pull rope 7, causing the pull rope 7 to pull the top block 71 away from the clamp 75. The torsion spring 710 returns to its original state, causing the clamp 75 to rotate outward. The third clamp plate 34 moves upward, causing the top plate 77 to move upward, thereby causing the second piston rod 79 to move upward. The sixth spring 78 is compressed, and the airflow in the second air cylinder 76 flows through the second air guide tube 73 and the air bag 74 to the inflation ring 72. The inflation ring 72 expands and fits against the patient's hand, thereby achieving a compression effect and strengthening the stabilization of the patient's hand. When the first inclined frame 24 moves forward, the pull rope 7 is in a relaxed state. People insert the top block 71 into the clamp 75, and the clamp 75 rotates inward to clamp the air bag 74. The torsion spring 710 undergoes torsional deformation, the third clamp plate 34 moves downward, causing the top plate 77 to move downward, the second piston rod 79 moves downward, and the sixth spring 78 returns to its original state.

[0095] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this invention.

Claims

1. An indwelling needle auxiliary device for use in oncology to prevent redness and swelling at the needle insertion site, characterized in that: The system includes: a first support frame (1) and a cover plate (12), with the cover plate (12) rotatably connected to the upper side of the first support frame (1); a fixing plate (2), with the fixing plate (2) fixedly connected to the front side of the bottom inside the cover plate (12); an elastic locking block (21), with the elastic locking block (21) slidably connected to the rear side of the bottom inside the cover plate (12) for locking the heparin cap; a fixing block (27), with the fixing block (27) fixedly connected to the rear side of the bottom inside the cover plate (12); an indwelling needle (11), with the indwelling needle (11) placed between the elastic locking block (21) and the fixing block (27); a first inclined frame (24), with the first inclined frame (24) slidably connected to the rear side of the fixing plate (2); and a first spring (26), with the first inclined frame (24) fixedly connected to the fixing plate (2). A spring (26), the first spring (26) is wound around the fixed plate (2); a first clamp (25), the fixed plate (2) is slidably connected to the first clamp (25) for clamping the catheter, the first inclined frame (24) is slidably connected to the first clamp (25); a first connecting frame (22), the elastic block (21) is fixedly connected to the first connecting frame (22); a swing rod (23), the left and right sides of the front part of the first connecting frame (22) are rotatably connected to the swing rod (23), the swing rod (23) is rotatably connected to the first inclined frame (24); it also includes: a second clamp (3), the front part of the first support frame (1) is fixedly connected to the second clamp (3); a third clamp (34), the second clamp (3) is slidably connected to the lower part of the second clamp (3) for clamping the patient's hand. Three-ply plate (34); second inclined frame (31), the second inclined frame (31) is slidably connected to the left side of the first support frame (1), and the cover plate (12) is pressed into the second inclined frame (31); first wedge block (32), the first wedge block (32) is slidably connected to the lower left side of the first support frame (1), the second inclined frame (31) is pressed into the first wedge block (32), and the first wedge block (32) is pressed into the third ply plate (34); also includes: second connecting frame (6), the second connecting frame (6) is fixedly connected to the lower right side of the third ply plate (34); second support frame (65), the second support frame (65) is fixedly connected to the upper front side of the first support frame (1); expansion block (64), the second support frame (65) is fixedly connected to the second support frame (65) for The expansion block (64) of the inner needle tube is pressed down; the first air cylinder (62) is fixedly connected to the top of the second support frame (65) on the right side; the first piston rod (67) is slidably connected to the right side of the first air cylinder (62); the fourth spring (66) is fixedly connected between the first piston rod (67) and the first air cylinder (62), and the fourth spring (66) is wrapped around the first piston rod (67); the second wedge block (61) is fixedly connected to the right side of the first piston rod (67), and the second connecting frame (6) and the second wedge block (61) are squeezed together; the first air guide tube (63) is connected between the first air cylinder (62) and the expansion block (64).

2. The indwelling needle auxiliary device for preventing skin redness and swelling at the needle insertion site in oncology as described in claim 1, characterized in that: It also includes: a second spring (33), a second spring (33) is fixedly connected between the first wedge block (32) and the first support frame (1), and the second spring (33) is wound around the first support frame (1).

3. The indwelling needle auxiliary device for preventing skin redness and swelling at the needle insertion site in oncology as described in claim 2, characterized in that: The upper part of the third clamp (34) is arc-shaped.

4. The indwelling needle auxiliary device for preventing skin redness and swelling at the needle insertion site in oncology as described in claim 3, characterized in that: It also includes: telescopic assembly (41), the top of the first inclined frame (24) is fixedly connected to the telescopic assembly (41); connecting rod (4), the telescopic assembly (41) is fixedly connected to the connecting rod (41); guide wheel (42), the lower front of the connecting rod (4) is rotatably connected to the guide wheel (42) for guiding the conduit; top frame (43), the top of the second clamping plate (3) is fixedly connected to the top middle; screw rod (45), the top frame (43) is rotatably connected to the front of the top frame (43); clamping block (44), the left and right sides of the screw rod (45) are threadedly connected to the clamping block (44), and the clamping block (44) is slidably connected to the top frame (43).

5. The indwelling needle auxiliary device for preventing skin redness and swelling at the needle insertion site in oncology as described in claim 4, characterized in that: It also includes: a button (51), a button (51) installed on the left side of the first support frame (1); a pressing block (53), a pressing block (53) slidably connected to the upper side of the second inclined frame (31); an ultraviolet lamp (5), an ultraviolet lamp (5) for sterilizing the needle insertion site on the front upper side of the cover plate (12), and the ultraviolet lamp (5) and the button (51) are electrically connected.

6. The indwelling needle auxiliary device for preventing skin redness and swelling at the needle insertion site in oncology as described in claim 5, characterized in that: It also includes: a third spring (52), a third spring (52) is fixedly connected between the pressing block (53) and the second inclined frame (31), and the third spring (52) is wound around the pressing block (53).

7. The indwelling needle auxiliary device for preventing skin redness and swelling at the needle insertion site in oncology as described in claim 6, characterized in that: The lower part of the expansion block (64) is toothed.

8. The indwelling needle auxiliary device for preventing skin redness and swelling at the needle insertion site in oncology as described in claim 7, characterized in that: It also includes: a pull rope (7), which is fixedly connected to the first inclined frame (24); a top block (71), which is fixedly connected to the end of the pull rope (7); a top plate (77), which is fixedly connected to the third clamping plate (34); a second air cylinder (76), which is fixedly connected to the rear right side of the first support frame (1); a second piston rod (79), which is slidably connected to the second air cylinder (76), and the top plate (77) is fixedly connected to the second piston rod (79); and a sixth spring (78), which is fixedly connected between the second air cylinder (76) and the second piston rod (79) sliding on it. 78), the sixth spring (78) is wound around the second piston rod (79); inflation ring (72), an inflation ring (72) for fixing the front side of the patient's hand is fixedly connected to the rear side of the first support frame (1); air bag (74), an air bag (74) is connected to the inflation ring (72); second air tube (73), a second air tube (73) is connected between the air bag (74) and the second air cylinder (76); clip (75), a clip (75) is symmetrically rotated and connected to the lower rear part of the first support frame (1); torsion spring (710), a torsion spring (710) is fixedly connected between the clip (75) and the first support frame (1), the torsion spring (710) is wound around the first support frame (1).

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