Flexible securement device for a picc catheter for oncology care

Abstract

The application discloses a flexible fastening device of a PICC catheter for tumor care, relates to the technical field of tumor care, and comprises an arm model, wherein a PICC catheter body is inserted into the arm model; further comprising a bandage, a protection plate is slidably connected between fixed columns, at least four second springs are connected between the bottom of the protection plate and a second rubber block, a first magic tape and a second magic tape are connected to the side of the bandage away from the protection plate, a clamping assembly for clamping and fixing the PICC catheter body is arranged on the inner side of the protection plate, and a limiting mechanism for avoiding sliding when the device is fixed on the arm of a patient is arranged in the bandage. The PICC catheter body is clamped and fixed through the clamping assembly, the fixing effect is increased through the limiting mechanism, and the PICC catheter body is protected through the protection plate, so that the situation of unplanned extubation or iatrogenic skin injury is avoided when the patient swings or collides with the instrument during movement, and the practicability of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of tumor care technology, and more particularly to a flexible fastening device for PICC catheters used in tumor care. Background Technology

[0002] PICC placement involves inserting a catheter through a peripheral vein and delivering it to the superior vena cava, which is close to the heart. This provides patients with medium- to long-term intravenous infusion therapy and serves as a unique lifeline. This placement technique has become the primary choice for cancer patients undergoing chemotherapy and those requiring long-term intravenous nutritional support. In practical use, proper fixation of the PICC catheter is crucial to avoid unplanned removal or iatrogenic skin damage.

[0003] Patent publication number CN217246130U discloses a flexible fastening device for PICC catheters used in tumor care, including a limiting pad and two PICC catheter connectors. The upper surface of the limiting pad has a concave connecting groove adapted to the PICC catheter connectors. The upper surface of the limiting pad is provided with a fixing strap for fixing the two PICC catheter connectors, and the surface of the fixing strap is provided with a first Velcro tab. The upper surface of the limiting pad is embedded with a first Velcro female tab corresponding to the first Velcro tab. The two sides of the limiting pad are respectively provided with a first binding strap and a second binding strap.

[0004] The aforementioned flexible fastening device for PICC catheters used in tumor care first secures the PICC catheter connector by snapping it into two concave connecting grooves, and then using the first Velcro tab and the first Velcro liner to bond together to fix the PICC catheter connector. This addresses the issue of the PICC catheter connector shaking during patient movement. Since patients are prone to swinging or colliding with instruments during movement, the PICC catheter connector is only wrapped by the fastening strap, lacking necessary protective measures, which can easily lead to catheter damage. Furthermore, since the arm is thinner than it is thicker, relying solely on Velcro to hold it to the arm can cause the fastening device to rotate and slip down during movement, reducing the fixation effect. Therefore, a flexible fastening device for PICC catheters used in tumor care with protective functions and enhanced fixation effect was developed. Summary of the Invention

[0005] To overcome the shortcomings of the lack of necessary protective measures, which easily leads to catheter damage, and the fact that the fastening device is prone to rotation and slippage during patient movement, thus reducing the fixation effect, the present invention provides a flexible fastening device for PICC catheters used in tumor care that has protective functions and increases fixation effect.

[0006] A flexible fastening device for a PICC catheter used in tumor care includes an arm model with a PICC catheter body inserted into it; a strap is placed on the arm model; at least two second rubber blocks are symmetrically connected to the strap; at least four fixing posts are symmetrically connected to the second rubber blocks in pairs; a protective plate is slidably connected between the fixing posts; at least four second springs are connected between the bottom of the protective plate and the second rubber blocks, with the second springs wound around adjacent fixing posts; a first rubber block is adhered to the outside of the protective plate; a first Velcro and a second Velcro are connected to the side of the strap away from the protective plate, with the first and second Velcro distributed in an inward and outward direction; a clamping component for clamping and fixing the PICC catheter body is provided on the inside of the protective plate; and a limiting mechanism is provided inside the strap to prevent the device from slipping when fixed on the patient's arm.

[0007] Furthermore, it is particularly preferred that the clamping assembly includes an L-shaped connecting plate, the number of which is at least two, the L-shaped connecting plates are symmetrically connected inside the protective plate, a clamping plate is slidably connected to the L-shaped connecting plate, and a first spring is connected between the side of the clamping plate that is close to each other and the adjacent L-shaped connecting plate, the first spring being wound around the adjacent clamping plate.

[0008] Furthermore, it is particularly preferred that the limiting mechanism includes an airbag, the number of which is at least two, the airbags are symmetrically connected in the strap, the air outlet of the airbag is plugged with a rubber stopper, the air inlet of the airbag is connected to an air tube, a one-way valve is installed on the air tube, and an air inlet press ball is connected to the side of the air tube away from the airbag.

[0009] Furthermore, it is particularly preferred that the device also includes a reinforcement mechanism to enhance the stability of the flexible fastening device. The reinforcement mechanism is disposed on the protective plate and includes a telescopic rod connected to the side of the protective plate away from the L-shaped connecting plate. The telescopic end of the telescopic rod is connected to a movable plate. There are at least two fixed plates, which are symmetrically and slidably connected to the movable plate. Arc-shaped clamping plates are slidably connected to the fixed plates. A third spring is connected between the side of the arc-shaped clamping plates that is close to each other and the adjacent fixed plate. The third spring is wound around the adjacent arc-shaped clamping plate.

[0010] Furthermore, it is particularly preferred that the curved clamping plate is made of a non-slip rubber material.

[0011] Furthermore, it is particularly preferred that the device also includes a drainage mechanism for massaging the arm muscles when the flexible fastening device is fixed to the patient's arm. The drainage mechanism is disposed on the protective plate and includes a fixing frame connected to the protective plate on the side near the telescopic rod. A lead screw is slidably connected to the fixing frame, and a telescopic plate is connected to the side of the lead screw near the L-shaped connecting plate. The number of drainage blocks is at least two, and the drainage blocks are symmetrically connected to the bottom of the telescopic plate. A drive assembly is disposed on the fixing frame.

[0012] Furthermore, it is particularly preferred that the drive assembly includes a servo motor mounted on a fixed frame, the output shaft of the servo motor being connected to a second gear via a coupling, a rotating frame being rotatably connected to the fixed frame, a first gear being connected to the rotating frame, the first gear meshing with the second gear, a shift pin being connected to the inner wall of the first gear, and the shift pin contacting the internal thread of the lead screw.

[0013] In addition, it is particularly preferred that the device also includes a placement mechanism for timely hemostasis when the PICC catheter body is accidentally dislodged. The placement mechanism is located inside the protective plate and includes a placement box for holding a sterile swab. The placement box is slidably connected to the protective plate and has a pull cord connected to it. A locking block is slidably connected to the side of the protective plate away from the telescopic rod. The placement box is provided with a fixing component for securing the sterile swab.

[0014] Furthermore, it is particularly preferred that the fixing component includes a T-shaped plate, which is slidably connected inside the placement box, and a fourth spring is connected between the T-shaped plate and the placement box, with the fourth spring wound around the T-shaped plate.

[0015] Furthermore, it is particularly preferred that the device also includes a reminder mechanism for promptly alerting the patient when the protective plate is impacted. The reminder mechanism is mounted on the second rubber block and includes a support frame connected to the second rubber block near the side of the first Velcro. A wedge block is slidably connected to the support frame, and a fifth spring is connected between the wedge block and the support frame. The fifth spring is wound around the wedge block, and an alert sound is mounted on the support frame. A switch button is mounted on the side of the alert sound near the wedge block, and the protective plate and the wedge block are pressed together.

[0016] The present invention has the following advantages: 1. The present invention first clamps and fixes the PICC catheter body with a clamp, then inflates the balloon to make the strap more securely hold the patient's arm, increasing the fixation effect, and then protects the PICC catheter body with a protective plate to avoid unplanned tube removal or iatrogenic skin injury when the patient swings or collides with the device during movement, thereby improving the practicality of the device.

[0017] 2. The present invention further fixes the device to the patient's arm with an arc-shaped clamping plate, preventing the strap from causing the clamping plate to slide down and causing the PICC catheter body to shift, thus affecting the treatment effect and improving the fixation effect of the device.

[0018] 3. This invention uses a massage block to massage the arm muscles, accelerates blood circulation in the arm, relieves patient discomfort, and improves treatment efficiency.

[0019] 4. By placing sterile cotton swabs inside the placement box, the present invention enables patients to stop bleeding promptly in the event of accidental catheter dislodgement, thereby improving the practicality of the device.

[0020] 5. This invention uses an alarm sound to remind patients to correct their posture in a timely manner, avoiding skin damage caused by displacement of the PICC catheter body due to continuous impact, thus improving the protective performance of the device. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a three-dimensional structural diagram of the protective mechanism of the present invention.

[0023] Figure 3 This is a three-dimensional structural diagram of the limiting mechanism of the present invention.

[0024] Figure 4 This is a three-dimensional structural diagram of the airbag, rubber stopper, and one-way valve components of the present invention.

[0025] Figure 5 This is a three-dimensional structural diagram of the reinforcement mechanism of the present invention.

[0026] Figure 6 This is a three-dimensional structural diagram of the unblocking mechanism of the present invention.

[0027] Figure 7 This is a three-dimensional structural diagram of the components of the present invention, including the fixing frame, rotating frame, and lever.

[0028] Figure 8 This is a three-dimensional structural diagram of the placement mechanism of the present invention.

[0029] Figure 9 This is an exploded three-dimensional view of the placement mechanism of the present invention.

[0030] Figure 10 This is a three-dimensional structural diagram of the reminder mechanism of the present invention.

[0031] Figure 11 This is a three-dimensional structural diagram of the wedge block, support frame, and alarm sound components of the present invention.

[0032] Labels in the diagram: 1: Arm model, 11: PICC catheter body, 12: Clamping plate, 13: First spring, 14: L-shaped connecting plate, 15: Protective plate, 16: First rubber block, 17: Second spring, 18: Second rubber block, 181: Fixing post, 19: Strap, 110: First Velcro, 111: Second Velcro, 2: Airbag, 21: Rubber plug, 22: Air tube, 23: One-way valve, 24: Inlet press ball, 3: Arc-shaped clamping plate, 31 31: Third spring; 32: Fixed plate; 33: Moving plate; 34: Telescopic rod; 4: Unblocking block; 41: Telescopic plate; 42: Lead screw; 43: Fixed frame; 44: First gear; 45: Rotating frame; 46: Second gear; 47: Servo motor; 48: Pulley; 5: Placement box; 51: Pull rope; 52: Locking block; 53: T-shaped plate; 54: Fourth spring; 6: Wedge block; 61: Fifth spring; 62: Support frame; 63: Switch button; 64: Alarm sound. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0034] Example 1: A flexible fastening device for PICC catheters used in tumor care, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the device includes an arm model 1 with a PICC catheter body 11 inserted into it; it also includes a strap 19 placed on the arm model 1. The upper front and rear sides of the strap 19 are connected to second rubber blocks 18, and the left and right sides of the second rubber blocks 18 are connected to fixing posts 181. A protective plate 15 is slidably connected between the fixing posts 181. At least two second springs 17 are connected between the lower front and rear sides of the protective plate 15 and the adjacent second rubber blocks 18. The second springs 17 are respectively wound around the adjacent fixing posts 181. A first rubber block 16 is adhered to the outside of the protective plate 15. A first Velcro 110 is connected to the lower outer side of the strap 19, and a second Velcro 111 is connected to the lower inner side of the strap 19. A clamping assembly for clamping and fixing the PICC catheter body 11 is provided on the inner side of the protective plate 15. A limiting mechanism is provided inside the strap 19 to prevent the device from slipping when it is fixed on the patient's arm.

[0035] like Figure 2As shown, the clamping assembly includes two L-shaped connecting plates 14. The L-shaped connecting plates 14 are respectively connected to the front and rear parts of the inner side of the protective plate 15. The clamping plates 12 are slidably connected to the L-shaped connecting plates 14. A first spring 13 is connected between the side of the clamping plates 12 that is close to each other and the adjacent L-shaped connecting plate 14. The first spring 13 is wound around the adjacent clamping plate 12.

[0036] like Figure 3 and Figure 4 As shown, the limiting mechanism includes two airbags 2. The airbags 2 are connected to the front and rear parts of the inner wall of the strap 19 respectively. The air outlet of the upper right part of the airbag 2 is inserted with a rubber stopper 21. The air inlet of the lower left part of the airbag 2 is connected to an air tube 22. A one-way valve 23 is installed on the air tube 22. An air inlet pressing ball 24 is connected to the right side of the air tube 22.

[0037] When using this device, medical staff first insert the PICC catheter body 11 into the patient's arm, then place the device on the patient's arm, and then pull the clamp 12 outwards so that the PICC catheter body 11 is positioned between the clamps 12. The first spring 13 will deform and release the clamp 12. Under the elastic action of the first spring 13, the clamp 12 will clamp and fix the PICC catheter body 11. Then, the strap 19 is wrapped around the patient's arm so that the first Velcro 110 and the second Velcro 111 are attached to each other. Then, by squeezing the air intake press ball 24, external air is allowed to enter the air bag 2 through the one-way valve 23 and the trachea 22. When the air bag 2 inflates due to the appropriate amount of air, the air intake press ball 24 is stopped. The inflated air bag 2 will fill the gap between the strap 19 and the arm, thereby making the device more stable in fixing the PICC catheter body 11 to the patient's arm.

[0038] When the patient's arm swings or collides with the device during movement, the device will impact the first rubber block 16, causing the protective plate 15 to move downwards. The second spring 17 will deform. When the patient moves away from the impacting device, under the elastic action of the second spring 17, the protective plate 15 will drive the first rubber block 16 to move upwards and reset. The protective plate 15 will protect the PICC catheter body 11, preventing the PICC catheter body 11 from being directly impacted and causing unplanned extubation or iatrogenic skin injury.

[0039] When it is necessary to remove the PICC catheter body 11 from the patient's arm, first remove the rubber stopper 21 from the balloon 2 to deflate it, then peel the second Velcro 111 off the first Velcro 110, and then pull open the clamp 12 to loosen the PICC catheter body 11. After that, remove the device and place it aside. Medical staff can then remove the PICC catheter body 11 from the patient's arm.

[0040] In summary, the PICC catheter body 11 is first clamped and fixed by the clamp 12, then the strap 19 is more securely wrapped around the patient's arm by inflating the balloon 2, thus increasing the fixation effect. Then the PICC catheter body 11 is protected by the protective plate 15 to prevent unplanned extubation or iatrogenic skin injury when the patient swings or collides with the device during movement, thereby improving the practicality of the device.

[0041] Example 2: Based on Example 1, such as Figure 5 As shown, it also includes a reinforcement mechanism to enhance the stability of the flexible fastening device. The reinforcement mechanism is set on the protective plate 15 and includes a telescopic rod 34. The telescopic rod 34 is connected to the left side of the protective plate 15. The telescopic end of the telescopic rod 34 is connected to a movable plate 33. The front and rear parts of the movable plate 33 are slidably connected to fixed plates 32. The lower part of the fixed plate 32 is slidably connected to an arc-shaped clamping plate 3. A third spring 31 is connected between the side of the arc-shaped clamping plate 3 that is close to each other and the adjacent fixed plate 32. The third spring 31 is wrapped around the adjacent arc-shaped clamping plate 3. The arc-shaped clamping plate 3 is made of rubber with anti-slip properties.

[0042] Since the human arm is thicker at the top and thinner at the bottom, when this device is fixed on the patient's arm, if the patient's arm swings vertically downwards, the device may tend to slide down. To prevent this, the specific operation is as follows: Initially, the third spring 31 is in a deformed state, and the arc-shaped clamping plate 3 is clamped on the thicker part of the arm. When the device tends to slide down, the protective plate 15 will drive the telescopic rod 34 and the moving plate 33 to move to the right, thereby driving the fixed plate 32 and the arc-shaped clamping plate 3 to move inwards. The arc-shaped clamping plate 3 will further clamp on the patient's arm, and the third spring 31 continues to deform. When the device is removed from the arm, under the elastic action of the third spring 31, the arc-shaped clamping plate 3 will move outwards to reset. In summary, the arc-shaped clamping plate 3 further fixes the device on the patient's arm, preventing the strap 19 from causing the clamping plate 12 to slide down, which would cause the PICC catheter body 11 to shift and affect the treatment effect, thus improving the fixation effect of the device.

[0043] like Figure 6 and Figure 7 As shown, it also includes a drainage mechanism for massaging arm muscles when the flexible fastening device is fixed on the patient's arm. The drainage mechanism is set on the protective plate 15 and includes a fixing frame 43. The fixing frame 43 is connected to the left side inside the protective plate 15. A lead screw 42 is slidably connected to the lower rear side of the fixing frame 43. A telescopic plate 41 is connected to the right side of the lead screw 42. Drainage blocks 4 are connected to the front and rear sides of the bottom of the telescopic plate 41. A drive assembly is provided on the lower front side of the fixing frame 43.

[0044] like Figure 7As shown, the drive assembly includes a servo motor 47, which is mounted on the lower front side of the fixed frame 43. The output shaft of the servo motor 47 is connected to a second gear 46 via a coupling. A rotating frame 45 is rotatably connected to the lower rear side of the fixed frame 43. A first gear 44 is connected to the right side of the rotating frame 45. The first gear 44 meshes with the second gear 46. A shift post 48 is connected to the inner wall of the first gear 44, and the shift post 48 is in contact with the internal thread of the lead screw 42.

[0045] Because the bandage 19 is wrapped around the patient's arm for a long time, it can easily cause poor blood circulation. It is necessary to massage the arm muscles. The specific operation is as follows: First, start the servo motor 47 and control the output shaft of the servo motor 47 to drive the second gear 46 to rotate. This, in turn, drives the rotating frame 45 and the lever 48 to rotate through the first gear 44. The rotation of the lever 48 will drive the lead screw 42 to move left and right, which in turn drives the telescopic plate 41 and the unblocking block 4 to move left and right. During the left and right movement, the unblocking block 4 will massage the arm muscles, accelerate the blood circulation in the arm, relieve the patient's discomfort, and improve the treatment efficiency. After the massage is completed, turn off the servo motor 47.

[0046] like Figure 8 and Figure 9 As shown, it also includes a placement mechanism for timely hemostasis when the PICC catheter body 11 is accidentally dislodged. The placement mechanism is located inside the protective plate 15 and includes a placement box 5 for placing a sterile cotton swab. The placement box 5 is slidably connected to the right side of the protective plate 15. A pull rope 51 is connected to the right side of the placement box 5. A locking block 52 is slidably connected to the upper right side of the protective plate 15. A fixing component for fixing the sterile cotton swab is provided inside the placement box 5.

[0047] like Figure 9 As shown, the fixing component includes a T-shaped plate 53, which is slidably connected to the front wall of the placement box 5. A fourth spring 54 is connected between the rear of the T-shaped plate 53 and the placement box 5, and the fourth spring 54 is wound around the T-shaped plate 53.

[0048] When a patient's PICC catheter body 11 accidentally dislodges from their arm due to strenuous exercise, the patient needs to apply pressure to the wound to stop the bleeding and prevent inflammation. The specific procedure is as follows: Initially, the fourth spring 54 is in a deformed state, and the T-shaped plate 53 secures the spare sterile cotton swabs in the placement box 5. When the patient needs to stop the bleeding, first remove the locking block 52 from the protective plate 15 and place it aside. Then, hook the pull rope 51 to pull the placement box 5 out of the protective plate 15 and take out the sterile cotton swabs for use. Under the elastic action of the fourth spring 54, the T-shaped plate 53 moves backward to reset. After use, push the placement box 5 back into its original position and insert the locking block 52 into its original position to limit the placement box 5. In summary, by placing sterile cotton swabs in the placement box 5, the patient can stop the bleeding in time when the catheter is accidentally dislodged, improving the practicality of the device.

[0049] like Figure 10 and Figure 11 As shown, it also includes a reminder mechanism for timely alerting the patient when the protective plate 15 is impacted. The reminder mechanism is mounted on the second rubber block 18 and includes a support frame 62 connected to the right side of the front second rubber block 18. A wedge block 6 is slidably connected to the upper left of the support frame 62. A fifth spring 61 is connected between the wedge block 6 and the support frame 62 and is wound around the wedge block 6. An alert sound 64 is installed on the upper right of the support frame 62, and a switch button 63 is installed on the left side of the alert sound 64. The protective plate 15 and the wedge block 6 are pressed together.

[0050] During movement, the protective plate 15 may be bumped without the patient's notice. To prevent the PICC catheter body 11 from being affected, the patient needs to be promptly reminded to correct their posture. The specific operation is as follows: When a collision occurs, the protective plate 15 will move downwards until it contacts the wedge block 6. The protective plate 15 will squeeze the wedge block 6, causing it to move to the right. The fifth spring 61 will deform, and the wedge block 6 will move to the right and contact the switch button 63, activating the reminder sound 64. The reminder sound 64 will emit a sound to remind the patient to correct their posture in time, so as to avoid the PICC catheter body 11 being displaced due to continuous impact and damaging the skin, thus improving the protective performance of the device.

[0051] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A flexible fastening device for a PICC catheter used in tumor care, comprising an arm model (1) with a PICC catheter body (11) inserted into the arm model (1); characterized in that, It also includes straps (19), straps (19) are placed on the arm model (1), there are at least two second rubber blocks (18), the second rubber blocks (18) are symmetrically connected to the straps (19), there are at least four fixing posts (181), every two fixing posts (181) are symmetrically connected to the second rubber blocks (18), a protective plate (15) is slidably connected between the fixing posts (181), and at least four second springs (17) are connected between the bottom of the protective plate (15) and the second rubber blocks (18). The first rubber block (16) is glued to the outside of the protective plate (15). The first Velcro (110) and the second Velcro (111) are connected to the side of the strap (19) away from the protective plate (15). The first Velcro (110) and the second Velcro (111) are distributed inside and outside. The inner side of the protective plate (15) is provided with a clamping component for clamping and fixing the PICC catheter body (11). The strap (19) is provided with a limiting mechanism to prevent the device from slipping when it is fixed on the patient's arm. The clamping assembly includes an L-shaped connecting plate (14), and there are at least two L-shaped connecting plates (14). The L-shaped connecting plates (14) are symmetrically connected inside the protective plate (15). A clamping plate (12) is slidably connected to the L-shaped connecting plate (14). A first spring (13) is connected between the side of the clamping plate (12) that is close to each other and the adjacent L-shaped connecting plate (14). The first spring (13) is wound around the adjacent clamping plate (12). It also includes a reinforcement mechanism for enhancing the stability of the flexible fastening device. The reinforcement mechanism is set on the protective plate (15). The reinforcement mechanism includes a telescopic rod (34). The telescopic rod (34) is connected to the side of the protective plate (15) away from the L-shaped connecting plate (14). The telescopic end of the telescopic rod (34) is connected to a movable plate (33). There are at least two fixed plates (32). The fixed plates (32) are symmetrically and slidably connected to the movable plate (33). An arc-shaped clamping plate (3) is slidably connected to the fixed plate (32). A third spring (31) is connected between the side of the arc-shaped clamping plates (3) that is close to each other and the adjacent fixed plate (32). The third spring (31) is wrapped around the adjacent arc-shaped clamping plate (3).

2. A flexible fastening device for a PICC catheter used in tumor care according to claim 1, characterized in that, The limiting mechanism includes an airbag (2), and there are at least two airbags (2). The airbags (2) are symmetrically connected inside the strap (19). The air outlet of the airbag (2) is inserted with a rubber stopper (21). The air inlet of the airbag (2) is connected to an air tube (22). A one-way valve (23) is installed on the air tube (22). An air inlet pressing ball (24) is connected to the side of the air tube (22) away from the airbag (2).

3. A flexible fastening device for a PICC catheter used in tumor care according to claim 2, characterized in that, The arc-shaped clamping plate (3) is made of non-slip rubber.

4. A flexible fastening device for a PICC catheter used in tumor care according to claim 3, characterized in that, It also includes a drainage mechanism for massaging arm muscles when the flexible fastening device is fixed on the patient's arm. The drainage mechanism is set on the protective plate (15). The drainage mechanism includes a fixing frame (43). The fixing frame (43) is connected to the side of the protective plate (15) near the telescopic rod (34). A lead screw (42) is slidably connected to the fixing frame (43). A telescopic plate (41) is connected to the side of the lead screw (42) near the L-shaped connecting plate (14). There are at least two drainage blocks (4). The drainage blocks (4) are symmetrically connected to the bottom of the telescopic plate (41). A drive assembly is provided on the fixing frame (43).

5. A flexible fastening device for a PICC catheter used in tumor care according to claim 4, characterized in that, The drive assembly includes a servo motor (47), which is mounted on a fixed frame (43). The output shaft of the servo motor (47) is connected to a second gear (46) via a coupling. A rotating frame (45) is rotatably connected to the fixed frame (43). A first gear (44) is connected to the rotating frame (45). The first gear (44) meshes with the second gear (46). A shift pin (48) is connected to the inner wall of the first gear (44). The shift pin (48) contacts the internal thread of the lead screw (42).

6. A flexible fastening device for a PICC catheter used in tumor care according to claim 5, characterized in that, It also includes a placement mechanism for timely hemostasis when the PICC catheter body (11) is accidentally dislodged. The placement mechanism is located inside the protective plate (15). The placement mechanism includes a placement box (5). The placement box (5) for placing disinfectant swabs is slidably connected inside the protective plate (15). A pull rope (51) is connected to the placement box (5). A locking block (52) is slidably connected to the side of the protective plate (15) away from the telescopic rod (34). A fixing component for fixing the disinfectant swabs is provided inside the placement box (5).

7. A flexible fastening device for a PICC catheter used in tumor care according to claim 6, characterized in that, The fixing component includes a T-shaped plate (53), which is slidably connected inside the placement box (5). A fourth spring (54) is connected between the T-shaped plate (53) and the placement box (5), and the fourth spring (54) is wound around the T-shaped plate (53).

8. A flexible fastening device for a PICC catheter used in tumor care according to claim 7, characterized in that, It also includes a reminder mechanism for timely alerting the patient when the protective plate (15) is impacted. The reminder mechanism is set on the second rubber block (18). The reminder mechanism includes a support frame (62). The support frame (62) is connected to the second rubber block (18) on the side near the first Velcro (110). A wedge block (6) is slidably connected to the support frame (62). A fifth spring (61) is connected between the wedge block (6) and the support frame (62). The fifth spring (61) is wound around the wedge block (6). An alert sound (64) is installed on the support frame (62). A switch button (63) is installed on the side of the alert sound (64) near the wedge block (6). The protective plate (15) and the wedge block (6) are pressed together.

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