Safe and stable device for postoperative PICC (Peripherally Inserted Central Catheter)

Abstract

The invention relates to the technical field of PICC (Peripherally Inserted Central Catheter) catheterization, in particular to a safe and stable device for postoperative PICC catheterization. Comprising a fixing device, the fixing device is fixed to an arm during use, a protective cover is arranged on the upper side of the fixing device, a pushing device and a moving device are arranged in the fixing device, and the protective cover drives the moving device to slide in the fixing device when moving. The protective cover is arranged on the upper side of the arc-shaped plate, when the protective cover does not move, the protective cover blocks the large arm of the human body, the bending amplitude between the large arm and the small arm is reduced, and the situation that a catheter reserved in the arm is pressed is avoided; according to the PICC protective cover, the protective cover can protect the PICC exposed outside the skin, and the problems that the PICC is broken, fractured or separated from the body due to the fact that the PICC is pulled by the arm when the arm swings, adverse events occur, and the human body is injured are solved.

Description

Technical Field

[0001] The invention relates to the technical field of PICC catheter protection, and in particular to a safe and stable device for postoperative PICC catheterization. Background Art

[0002] The PICC tube is a catheter that is placed in the superior vena cava through a puncture in the peripheral vein of the arm. The catheter is made of high-grade silicone material, which is soft, resistant to aging, and has a long service life. The PICC tube is punctured from the peripheral vein of the arm and directly enters the vein near the heart to avoid direct contact between chemotherapy drugs and the arm vein. With the rapid increase in venous blood flow, chemotherapy drugs can be quickly diluted to prevent drugs from irritating the vein. The PICC catheter can be left in the body for 6 months to 1 year, and the human lifestyle will basically not be affected after the catheter is placed.

[0003] When the existing PICC catheter is in use, the PICC catheter is left in the human arm. When the catheter is not in use, when the patient's arm swings violently, it is easy for external objects to pull the catheter, causing friction between the catheter and the arm. At the same time, the pulled PICC catheter is subjected to tension, causing it to fall off, break or rupture, causing secondary injury to the human arm. At the same time, when the catheter is undergoing intravenous infusion, if the patient unconsciously bends his arm during the infusion, causing a large bending range between the upper arm and the forearm, the catheter left in the arm will be compressed, affecting the flow of fluid. In order to ensure the normal use of the catheter, this case provides a safe and stable device for postoperative PICC catheterization to protect the catheter. Summary of the invention

[0004] The purpose of the present invention is to provide a safe and stable device for postoperative PICC catheterization to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, a safe and stable device for postoperative PICC catheterization is provided, including a fixing device, which is fixed on the arm when in use, a protective cover is provided on the upper side of the fixing device, a pushing device and a moving device are provided inside the fixing device, and the pushing device is provided on the lower side of the moving device. When the protective cover moves, the moving device drives the moving device to slide inside the fixing device. When the protective cover does not move, the protective cover blocks the upper arm of the human body, reducing the bending amplitude between the upper arm and the forearm. After the protective cover slides, the moving device slides inside the fixing device and positions the structure of the protective cover, so that the protective cover protects the PTCC catheter set on the arm. At the same time, during the sliding process of the moving device, the moving device drives the pushing device to move, so that the pushing device presses and positions the PTCC catheter set on the arm.

[0006] As a further improvement of the present technical solution, the fixing device includes an arc-shaped plate, and two straps are fixedly connected to the lower side of the arc-shaped plate, and Velcro is provided on both straps, and the two Velcros are bonded and fixed together, and the lower end of the arc-shaped plate is arranged in an arc shape, and the arc-shaped position of the arc-shaped plate contacts the skin on the inner side of the human arm, and the two straps fix the arc-shaped plate on the forearm.

[0007] As a further improvement of the present technical solution, the moving device includes a movable block, which is arranged inside the arc plate, and one side of the arc plate is provided with an L-shaped groove that passes through the side wall of the arc plate, one end of the movable block is slidably arranged in the L-shaped groove, the protective cover is slidably arranged on the top of the arc plate, and the protective cover and the movable block are fixedly connected by a connecting plate, and when the protective cover slides on the arc plate, the movable block moves with the protective cover, so that one end of the movable block passes through an L-shaped groove and slides out.

[0008] As a further improvement of the technical solution, a moving block is fixedly connected to one side of the movable block, a side plate is fixedly connected to the inside of the arc plate, the side plate is arranged on the side of the moving block away from the movable block, a plurality of cam grooves connected to each other are opened inside the side plate, and a lifting block groove is arranged at one end of the cam groove, and a pressing groove is arranged at the other end of the cam groove, the horizontal height of the lifting block groove is higher than the horizontal height of the pressing groove, the cam groove, the lifting block groove and the pressing groove are combined to form a sliding groove, and a positioning piece is arranged between the moving block and the side plate, and the positioning piece positions the position of the moving block.

[0009] As a further improvement of the present technical solution, the positioning member includes a mounting block rotatably connected to one side of the moving block, a clamping block is fixedly connected to one side of the mounting block, one end of the clamping block is slidably set in a sliding groove, and when the clamping block and the cam groove are engaged, the positioning member fixes the position of the moving block.

[0010] As a further improvement of the present technical solution, a torsion spring is provided at the connection position between the mounting block and the movable block, and the mounting block drives the clamping block to rotate downward through the torsion spring. A clamping slot is provided on one side of the mounting block, and an elastic sheet is fixedly connected to one side of the movable block. When the clamping block moves into the starting block slot, the clamping block drives the mounting block to rotate, so that the elastic sheet and the clamping slot are clamped. When the clamping block contacts the pressing slot, the pressing slot drives the clamping block to move downward, so that the elastic sheet and the clamping slot are separated.

[0011] As a further improvement of the present technical solution, the pushing device includes a fixed plate, the interior of the arc-shaped plate is arranged in a plane, the fixed plate is fixedly connected to the interior of the arc-shaped plate, two sliding rods are slidably connected to the interior of the fixed plate, one end of the two sliding rods is commonly fixedly connected to a push plate, a groove is opened inside the arc-shaped plate, the size of the push plate is adapted to the size of the groove, and a linkage structure is arranged between the push plate and the movable block. When the movable block moves, the push plate is driven to move in a direction close to the groove through the linkage mechanism, and when the protective cover blocks the PICC catheter, the push plate moves to be directly above the groove.

[0012] As a further improvement of the technical solution, the lower side of the push plate is fixedly connected to a baffle through a plurality of tension springs, and a sponge is provided on the lower side of the baffle. When the push plate moves to just above the groove, the baffle is pushed into the groove by the plurality of tension springs to press and position the PICC tube fixed on the arm.

[0013] As a further improvement of the present technical solution, the linkage structure includes a movable plate fixed on one side of the push plate, a sliding groove is opened inside the movable plate, a U-shaped plate is fixed on the lower side of the movable block, a pulley is rotatably connected to the lower side of the U-shaped plate, and the pulley is slidably arranged inside the sliding groove. When the pulley slides in the sliding groove, it pushes the movable plate and the push plate to move in a direction close to the groove.

[0014] As a further improvement of the present technical solution, two installation grooves are provided inside the arc plate, and the installation grooves are located on both sides of the groove, and sliders are slidably connected inside the two installation grooves, and one end of the slider away from the installation groove is fixedly connected to both sides of the push plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the safe and stable device for postoperative PICC catheterization, a protective cover is provided on the upper side of the arc plate. When the protective cover is not moved, the protective cover blocks the upper arm of the human body, reducing the bending amplitude between the upper arm and the forearm, and can fix the arm with the PICC catheter inserted, avoiding compression of the catheter left inside the arm, ensuring the flow rate of venous blood flow, so that chemotherapy drugs can be quickly diluted.

[0017] 2. In the safe and stable device for postoperative PICC catheterization, after the protective cover is manually pushed to move, the protective cover moves to the top of the catheter exposed outside the skin, so that the protective cover protects the catheter exposed outside the skin, avoiding the problem that the PICC catheter is pulled by the arm when swinging, causing the PICC catheter to rupture, break or fall out of the body, causing adverse events and causing harm to the human body. At the same time, a positioning piece is provided between the moving block and the side plate, and the card block is clamped by multiple cam grooves. The positioning piece fixes the position of the moving block, thereby positioning the protective cover, thereby improving the stability of the PICC catheter protection.

[0018] 3. In the safe and stable device for postoperative PICC catheterization, when the protective cover covers the PICC catheter, the movable block moves to drive the U-shaped plate to drive the pulley to slide inside the slide groove. When the pulley slides to the inclined part of the slide groove, the push plate is pushed to move to the top of the groove. The reaction force of multiple tension springs pushes the baffle into the groove, and the PICC catheter fixed on the arm is pressed and positioned, thereby improving the stability of the PICC catheterization. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is one of the schematic diagrams when the overall structure of the present invention is not moved;

[0021] Figure 3 This is the second schematic diagram of the overall structure of the present invention when it moves;

[0022] Figure 4 This is the second schematic diagram of the overall structure of the present invention when it is not moved;

[0023] Figure 5 This is the second schematic diagram of the overall structure of the present invention when it moves;

[0024] Figure 6 It is a schematic diagram of the structure of the fixing device of the present invention;

[0025] Figure 7 It is a schematic diagram of the pushing device and the moving device of the present invention when they are not moving;

[0026] Figure 8 It is a schematic diagram of the pushing device and the moving device of the present invention when they are moving;

[0027] Fig. 9 It is a structural schematic diagram of the pushing device of the present invention;

[0028] Fig.10 It is a structural schematic diagram of the mobile device of the present invention;

[0029] Fig.11 It is a structural schematic diagram of the mounting block of the present invention.

[0030] The meaning of each number in the figure is:

[0031] 1. Fixing device; 11. Arc plate; 12. Binding strap; 13. L-shaped groove; 14. Groove; 15. Mounting groove; 16. Protective pad;

[0032] 2. Protective cover;

[0033] 3. Pushing device; 31. Fixed plate; 32. Sliding rod; 33. Moving plate; 34. Pushing plate; 35. Sliding groove; 36. Baffle plate; 37. Sliding block;

[0034] 4. Moving device; 41. U-shaped plate; 42. Movable block; 43. Side plate; 431. Cam groove; 432. Block groove; 433. Pressing groove; 44. Pulley; 45. Moving block; 46. Connecting plate; 47. Mounting block; 471. Torsion spring; 472. Card slot; 48. Card block; 49. Elastic sheet. DETAILED DESCRIPTION

[0035] 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.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] To protect PICC lines when not in use, refer to Figure 1-Figure 5As shown, the purpose of this embodiment is to provide a safe and stable device for postoperative PICC catheterization, including a fixing device 1, which is fixed on the arm when in use, and a protective cover 2 is arranged on the upper side of the fixing device 1, and the protective cover 2 is used to protect the PICC catheter. A pushing device 3 and a moving device 4 are arranged inside the fixing device 1, and the pushing device 3 is arranged on the lower side of the moving device 4. When the protective cover 2 moves, it drives the moving device 4 to slide inside the fixing device 1. When the protective cover 2 does not move, the protective cover 2 blocks the upper arm of the human body, reduces the bending amplitude between the upper arm and the forearm, and prevents the arm bending from affecting the use of the PICC catheter. After the protective cover 2 slides, the moving device 4 slides inside the fixing device 1 and adjusts the structure of the protective cover 2. Positioning, so that the protective cover 2 protects the PTCC tube set on the arm, and the protective cover 2 is manually pushed to drive the moving device 4 to slide inside the fixing device 1, so that when the protective cover 2 moves to one side of the fixing device 1, the PTCC tube set on the arm is protected. The PTCC tube set on the arm is protected and the protective cover 2 is positioned by the moving device 4, so that when the protective cover 2 moves above the PTCC tube, it is positioned. At the same time, during the sliding process of the moving device 4, the moving device 4 drives the pushing device 3 to move, so that the pushing device 3 presses and positions the PTCC tube set on the arm, thereby avoiding the loosening of the PTCC tube when the arm is bent, and ensuring the stability of the PTCC tube during use.

[0038] In order to achieve the above described effect, the above structure is refined as follows. Figure 5 As shown, the fixing device 1 includes an arc-shaped plate 11, the lower end of which is arranged in an arc shape, and the arc-shaped position of the arc-shaped plate 11 contacts the skin on the inner side of the human arm. The arc-shaped lower end of the arc-shaped plate 11 makes it fit the human arm more closely, and a protective pad 16 is arranged on the lower side of the arc-shaped plate 11. The protective pad 16 increases the comfort when the arc-shaped plate 11 fits the arm. Two straps 12 are fixedly connected to the lower side of the arc-shaped plate 11, and both straps 12 are provided with Velcro, and the two Velcros are bonded and fixed together. The two straps 12 fix the arc-shaped plate 11 on the forearm, and then the straps 12 are fixed on the arm through the bonding cooperation of the two Velcros, so that the arc-shaped plate 11 is fixed more stably. Heat dissipation holes are arranged on both sides of the arc-shaped plate 11 to facilitate the flow of air inside the arc-shaped plate 11, so that the sweat on the contact surface between the arc-shaped plate 11 and the arm can be discharged in time.

[0039] In order to ensure that the protective cover 2 drives the moving device 4, the moving device 4 can slide out of the curved plate 11 normally. Figure 5 , Fig.10 and Fig.11As shown, the moving device 4 includes a movable block 42, which is arranged inside the arc plate 11. One side of the arc plate 11 is provided with an L-shaped groove 13 that passes through the side wall of the arc plate 11. One end of the movable block 42 is slidably arranged in the L-shaped groove 13, and the protective cover 2 is slidably arranged on the top of the arc plate 11, and the protective cover 2 and the movable block 42 are fixedly connected by a connecting plate 46. When the protective cover 2 slides on the arc plate 11, the movable block 42 moves with the protective cover 2, so that one end of the movable block 42 passes through an L-shaped groove 13 and slides out. By manually pushing the protective cover 2, the protective cover 2 drives the movable block 42 to move through the connecting plate 46, so that the movable block 42 moves with the movement of the protective cover 2. Since the movable block 42 is arranged inside the arc plate 11, it is restricted by the arc plate 11 when moving. The movable block 42 passes through the L-shaped groove 13 through the opened L-shaped groove 13 and slides out from the L-shaped groove 13, which is convenient for moving the protective cover 2.

[0040] Considering that the protective cover 2 lacks position limitation when protecting the PTCC catheter, please refer to Figure 7-Figure 8 as well as Figure 10-11 As shown, a moving block 45 is fixedly connected to one side of the movable block 42, and a side plate 43 is fixedly connected to the inside of the arc plate 11. The side plate 43 is arranged on the side of the moving block 45 away from the movable block 42. A plurality of cam grooves 431 that are interconnected are opened inside the side plate 43, and a block-lifting groove 432 is arranged at one end of the cam groove 431, and a pressing groove 433 is arranged at the other end of the cam groove 431. The horizontal height of the block-lifting groove 432 is higher than the horizontal height of the pressing groove 433. The cam groove 431, the block-lifting groove 432 and the pressing groove 433 are combined to form a sliding groove. A positioning member is arranged between the moving block 45 and the side plate 43. The positioning member positions the position of the moving block 45. The positioning member includes a mounting block 47 that is rotatably connected to one side of the moving block 45. A clamping block 48 is fixedly connected to one side of the mounting block 47. One end of the clamping block 48 is slidably arranged in the sliding groove. When the block 48 and the cam groove 431 are engaged, the positioning piece fixes the position of the moving block 45, and the diameter of the block 48 is adapted to the diameter of the cam groove 431. When the protective cover 2 drives the movable block 42 to move toward the L-shaped groove 13, the movable block 42 drives the movable block 45 to move synchronously when it moves, and the movable block 45 drives the mounting block 47 to move, thereby driving the block 48 to move in the cam groove 431. As the movable block 42 moves, a torsion spring 471 is provided at the position where the mounting block 47 and the moving block 45 are connected. The mounting block 47 drives the block 48 to rotate downward through the torsion spring 471, so that the block 48 always has a downward rotation force. The block 48 sequentially crosses multiple cam grooves 431 and moves toward the block groove 432. The block 48 is engaged by multiple cam grooves 431, which is convenient for fixing the position of the moving block 45.

[0041] When it is necessary to use PTCC catheter placement, the protective cover 2 is continued to be moved toward the L-shaped groove 13. When the block 48 moves into the block groove 432, due to the high level of the block groove 432, the block 48 drives the mounting block 47 to rotate at a larger angle. A slot 472 is provided on one side of the mounting block 47. An elastic sheet 49 is fixedly connected to one side of the moving block 45 so that the elastic sheet 49 and the slot 472 are engaged. At this time, the block 48 does not contact the cam groove 431. Then, the protective cover 2 is pushed in the reverse direction to reset. When the block 48 contacts the pressing groove 433, due to the high level of the pressing groove 433, the block 48 is pressed against the pressing groove 433. The horizontal height is lower than that of the starting groove 432, and the pressing groove 433 drives the card block 48 to move downward, so that the elastic sheet 49 and the card groove 472 are separated, which is convenient for moving the protective cover 2 back and forth, thereby improving the movement effect of the protective cover 2. When the PTCC catheter is not in use, the PTCC catheter is shielded and protected by moving the protective cover 2, and the position of the protective cover 2 is fixed at the same time. When the PTCC catheter is in use, the protective cover 2 is moved in the opposite direction to be reset. The protective cover 2 blocks the upper arm of the human body, reduces the bending amplitude between the upper arm and the forearm, and can fix the arm with the PICC catheter.

[0042] To further improve the stability of the PTCC catheter during use, please refer to Figure 7-Figure 8 as well as Figure 9-10 As shown, the pushing device 3 includes a fixed plate 31, and the interior of the arc-shaped plate 11 is arranged in a plane, which is convenient for the pushing device 3 to move in the arc-shaped plate 11, reducing the friction between the pushing device 3 and the arc-shaped plate 11, and a U-shaped plate 41 is fixed on the lower side of the movable block 42, and a pulley 44 is rotatably connected to the lower side of the U-shaped plate 41. When the movable block 42 moves, the U-shaped plate 41 moves, and the sizes of the U-shaped plate 41 and the movable block 42 when moving are adapted to the sizes of the L-shaped groove 13. When the protective cover 2 moves, it drives the U-shaped plate 41 and the movable block 42 to slide out of the L-shaped groove 13, and the fixed plate 31 is fixedly connected to the inside of the arc-shaped plate 11, and two sliding rods 32 are slidably connected to the inside of the fixed plate 31, and one end of the two sliding rods 32 is fixedly connected to the pushing plate 34, and the arc-shaped plate 11 A groove 14 is provided inside the push plate 34, and the size of the push plate 34 is adapted to the size of the groove 14. A linkage structure is provided between the push plate 34 and the movable block 42 at the same time. When the movable block 42 moves, the push plate 34 is driven to move in a direction close to the groove 14 through the linkage mechanism. The linkage structure includes a movable plate 33 fixed to one side of the push plate 34, and a slide groove 35 is provided inside the movable plate 33, and the slide groove 35 is arranged in a Z shape, and the two ends of the slide groove 35 are arranged horizontally and the middle position is inclined. The U-shaped plate 41 drives the pulley 44 to slide inside the slide groove 35. When the pulley 44 slides to the inclined position of the slide groove 35, the movable plate 33 and the push plate 34 are pushed to move in a direction close to the groove 14, and at the same time, the slide rod 32 is driven to slide inside the fixed plate 31;

[0043] The fixed plate 31 and the slide bar 32 cooperate to limit the push plate 34 when it moves. When the movable block 42 moves, the push plate 34 is driven to move in the direction close to the groove 14 through the linkage mechanism. When the protective cover 2 protects the PICC catheter, the push plate 34 moves to the top of the groove 14. The lower side of the push plate 34 is fixedly connected with a baffle 36 through multiple tension springs. A sponge is arranged on the lower side of the baffle 36. When the push plate 34 moves to the top of the groove 14, the baffle 36 is driven to move downward under the reaction force of the tension spring. The baffle 36 drives the sponge to always fit the PICC tube. When the protective cover 2 does not protect the PICC tube, the linkage mechanism drives the push plate 34 to reset. Since the groove 14 is inclined on one side close to the baffle 36, the push plate 34 drives the baffle 36 to move, so that the baffle 36 is separated from the inside of the groove 14, and the baffle 36 is pushed into the groove 14 by multiple tension springs, so as to press and position the PICC tube fixed on the arm, thereby improving the stability of the PICC tube and reducing the damage to the human body.

[0044] Considering that the push plate 34 is prone to instability during movement, please refer to Figure 6 and Fig. 9 As shown, two mounting grooves 15 are provided inside the arc-shaped plate 11, and the mounting grooves 15 are located on both sides of the groove 14. Slide blocks 37 are slidably connected inside the two mounting grooves 15. One end of the slide block 37 away from the mounting groove 15 is fixedly connected to both sides of the push plate 34. When the pulley 44 is driven to slide in the slide groove 35 by the U-shaped plate 41, the movable plate 33 and the push plate 34 are driven to move toward the groove 14. The push plate 34 drives the slide block 37 to move in the mounting groove 15, so that the push plate 34 is more stable and the moving effect of the push plate 34 is improved.

[0045] When the safe and stable postoperative PICC catheter placement device of the present invention is used, a protective cover 2 is provided on the upper side of the arc-shaped plate 11. When the protective cover 2 is not moved, the protective cover 2 blocks the upper arm of the human body, reducing the bending amplitude between the upper arm and the forearm, and can fix the arm with the PICC catheter inserted, thereby preventing the catheter indwelling in the arm from being compressed, ensuring the flow rate of venous blood flow, and allowing the chemotherapy drugs to be quickly diluted;

[0046] After the protective cover 2 is manually pushed to move, the protective cover 2 moves to the top of the catheter exposed outside the skin, so that the protective cover 2 protects the catheter exposed outside the skin, avoiding the arm from pulling the PICC catheter when swinging, causing the PICC catheter to rupture, break or fall out of the body, causing adverse events and causing harm to the human body. At the same time, a positioning piece is provided between the moving block 45 and the side plate 43, and the clamping block 48 is clamped by a plurality of cam grooves 431. The positioning piece fixes the position of the moving block 45, thereby positioning the position of the protective cover 2, and improving the stability when protecting the PTCC catheter;

[0047] When the movable block 42 moves, the U-shaped plate 41 drives the pulley 44 to slide inside the slide groove 35. When the pulley 44 slides to the inclined part of the slide groove 35, it pushes the movable plate 33 and the push plate 34 to move in the direction close to the groove 14. When the protective cover 2 blocks the PICC tube, the push plate 34 moves to the top of the groove 14, and the reaction force of multiple tension springs pushes the baffle 36 into the groove 14, so as to press and position the PICC tube fixed on the arm, thereby improving the stability of the PICC tube.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A safe and stable device for postoperative PICC catheter placement, comprising a fixing device (1), wherein the fixing device (1) is fixed on an arm when in use, and a protective cover (2) is provided on the upper side of the fixing device (1), characterized in that: The fixing device (1) is provided with a pushing device (3) and a moving device (4) inside. The pushing device (3) is arranged at the lower side of the moving device (4). When the protective cover (2) moves, it drives the moving device (4) to slide inside the fixing device (1). When the protective cover (2) does not move, the protective cover (2) blocks the upper arm of the human body, thereby reducing the bending range between the upper arm and the forearm. After the protective cover (2) slides, the moving device (4) slides inside the fixing device (1) and positions the structure of the protective cover (2), so that the protective cover (2) protects the PTCC tube set on the arm. At the same time, during the sliding process of the moving device (4), the moving device (4) drives the pushing device (3) to move, so that the pushing device (3) presses and positions the PTCC tube set on the arm.

2. The safe and stable device for postoperative PICC catheterization according to claim 1, characterized in that: The fixing device (1) comprises an arc-shaped plate (11), the lower side of which is fixedly connected to two straps (12), both straps (12) being provided with Velcro, and the two Velcros are bonded and fixed together, the lower end of the arc-shaped plate (11) is arranged in an arc shape, the arc-shaped position of the arc-shaped plate (11) contacts the skin on the inner side of a human arm, and the two straps (12) fix the arc-shaped plate (11) on the forearm.

3. The safe and stable device for postoperative PICC catheterization according to claim 2, characterized in that: The moving device (4) comprises a movable block (42), the movable block (42) being arranged inside the arc plate (11), one side of the arc plate (11) being provided with an L-shaped groove (13) penetrating the side wall of the arc plate (11), one end of the movable block (42) being slidably arranged in the L-shaped groove (13), the protective cover (2) being slidably arranged on the top of the arc plate (11), and the protective cover (2) and the movable block (42) being fixedly connected via a connecting plate (46), and when the protective cover (2) slides on the arc plate (11), the movable block (42) moves along with the protective cover (2), so that one end of the movable block (42) penetrates an L-shaped groove (13) and slides out.

4. The safe and stable device for postoperative PICC catheterization according to claim 3, characterized in that: A moving block (45) is fixedly connected to one side of the movable block (42), and a side plate (43) is fixedly connected to the inside of the arc plate (11). The side plate (43) is arranged on a side of the moving block (45) away from the moving block (42). A plurality of cam grooves (431) that are connected to each other are provided inside the side plate (43), and a block-lifting groove (432) is provided at one end of the cam groove (431), and a pressing groove (433) is provided at the other end of the cam groove (431). The horizontal height of the block-lifting groove (432) is higher than the horizontal height of the pressing groove (433). The cam groove (431), the block-lifting groove (432) and the pressing groove (433) are combined to form a sliding groove. A positioning member is provided between the moving block (45) and the side plate (43), and the positioning member positions the position of the moving block (45).

5. The safe and stable device for postoperative PICC catheterization according to claim 4, characterized in that: The positioning member comprises a mounting block (47) rotatably connected to one side of the moving block (45); a clamping block (48) is fixedly connected to one side of the mounting block (47); one end of the clamping block (48) is slidably disposed in a sliding groove; when the clamping block (48) and the cam groove (431) are clamped, the positioning member fixes the position of the moving block (45).

6. The safe and stable device for postoperative PICC catheterization according to claim 5, characterized in that: A torsion spring (471) is provided at the position where the mounting block (47) and the moving block (45) are connected. The mounting block (47) drives the clamping block (48) to rotate downward through the torsion spring (471). A clamping groove (472) is provided on one side of the mounting block (47). An elastic sheet (49) is fixedly connected to one side of the moving block (45). When the clamping block (48) moves into the block-starting groove (432), the clamping block (48) drives the mounting block (47) to rotate, so that the elastic sheet (49) and the clamping groove (472) are clamped. When the clamping block (48) and the pressing groove (433) are in contact, the pressing groove (433) drives the clamping block (48) to move downward, so that the elastic sheet (49) and the clamping groove (472) are separated.

7. The safe and stable device for postoperative PICC catheterization according to claim 2, characterized in that: The pushing device (3) comprises a fixed plate (31), the interior of the arc-shaped plate (11) is arranged in a plane, the fixed plate (31) is fixedly connected to the interior of the arc-shaped plate (11), the interior of the fixed plate (31) is slidably connected to two sliding rods (32), one end of the two sliding rods (32) is commonly fixedly connected to a push plate (34), a groove (14) is provided inside the arc-shaped plate (11), the size of the push plate (34) is adapted to the size of the groove (14), and a linkage structure is provided between the push plate (34) and the movable block (42), when the movable block (42) moves, the push plate (34) is driven by the linkage mechanism to move in a direction close to the groove (14), and when the protective cover (2) blocks the PICC catheter, the push plate (34) moves to the top of the groove (14).

8. The safe and stable device for postoperative PICC catheterization according to claim 7, characterized in that: The lower side of the push plate (34) is fixedly connected to a baffle (36) via a plurality of tension springs, and a sponge is provided on the lower side of the baffle (36). When the push plate (34) moves to the top of the groove (14), the baffle (36) is pushed into the groove (14) by the plurality of tension springs, thereby pressing and positioning the PICC tube fixed on the arm.

9. The safe and stable device for postoperative PICC catheterization according to claim 7, characterized in that: The linkage structure comprises a movable plate (33) fixed on one side of the push plate (34), a slide groove (35) is provided inside the movable plate (33), a U-shaped plate (41) is fixed on the lower side of the movable block (42), a pulley (44) is rotatably connected to the lower side of the U-shaped plate (41), and the pulley (44) is slidably arranged inside the slide groove (35). When the pulley (44) slides in the slide groove (35), it pushes the movable plate (33) and the push plate (34) to move in a direction close to the groove (14).

10. The safe and stable device for postoperative PICC catheterization according to claim 2, characterized in that: Two mounting grooves (15) are provided inside the arc-shaped plate (11), and the mounting grooves (15) are located on both sides of the groove (14). Slide blocks (37) are slidably connected inside the two mounting grooves (15), and one end of the slide block (37) away from the mounting groove (15) is fixedly connected to both sides of the push plate (34).

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