PICC thrombolysis nursing device

Abstract

The invention relates to the technical field of medical apparatus and instruments, and provides a PICC thrombolysis nursing device which comprises a three-way valve, three pipe connectors of the three-way valve are connected with a liquid medicine injector, a suction injector and a catheter conveying device respectively, the catheter conveying device comprises a picc catheter connector and a connecting pipe, a flow state adjusting assembly is arranged in a cavity of the connecting pipe, and the flow state adjusting assembly is connected with the liquid medicine injector. A knob assembly is arranged outside the connecting pipe; the flow state adjusting assembly comprises a straight-through pipe fixed to the middle of the connecting pipe and an adjusting disc rotationally arranged in the middle of the straight-through pipe in a sealed mode, and conical head flow guide faces are arranged on the top disc face and the bottom disc face of the adjusting disc. During use, through the adjusting disc capable of switching the positions, liquid medicine is decomposed into wall-attached trickles in the vertical position to achieve uniform infiltration, the flow channel is recovered to be smooth in the horizontal position to be compatible with subsequent standard pipe washing operation, and the problems that a traditional single flow channel is extensive in form, uneven in distribution and poor in stability in the thrombolysis liquid medicine injection stage are solved. And the problem that the uniformity of the flow field is difficult to actively optimize in the pipe washing stage is solved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a PICC thrombolysis nursing device. Background Technology

[0002] Peripherally inserted central venous catheters (PICCs) are widely used in medium- to long-term intravenous therapy due to their long-term indwelling capability and good drug infusion compatibility. However, due to their slender structure and the characteristics of long-term use in specific clinical scenarios, PICCs have a high risk of luminal occlusion. If occlusion occurs and is not handled in time, it may lead to unplanned extubation and affect the treatment process.

[0003] Currently, commonly used PICC thrombolysis devices include a three-way valve, a pre-filled urokinase syringe, and a negative pressure aspiration syringe. The three ports of the three-way valve are connected to the PICC catheter end, the syringe, and the aspiration syringe, respectively. During operation, switch the three-way valve to connect the aspiration syringe to the PICC catheter, and then aspirate the syringe to establish negative pressure in the catheter. Then, rotate the three-way valve to connect the syringe to the PICC catheter, and use the negative pressure to inject urokinase into the PICC catheter lumen. After retaining the catheter for 15-30 minutes, aspirate the catheter again. If the catheter is not patent, repeat the above operation until it is patent. Finally, flush the catheter with 20 ml of normal saline in a pulsed manner.

[0004] However, in existing devices that use simple straight-through channels, the thrombolytic solution inhaled under negative pressure passes through the catheter in a concentrated and coarse manner. The contact area between the solution and the blockage in the lumen is limited, and the initial distribution is not uniform. This may cause the solution to accumulate on the surface of the blockage instead of spreading and penetrating rapidly, which actually delays the initiation process of drug infiltration and affects the baseline of thrombolytic efficiency.

[0005] Therefore, this application proposes a PICC thrombolysis nursing device to solve the above problems. Summary of the Invention

[0006] Technical problem to be solved: In view of the problems existing in the prior art, the purpose of this invention is to provide a PICC thrombolysis nursing device, which solves the problem that in the existing PICC thrombolysis nursing, the thrombolytic solution is coarse in shape and unevenly distributed when injected into the PICC catheter due to the simple infusion channel structure, which is not conducive to rapid initiation of effective infiltration.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a PICC thrombolysis nursing device, including a three-way valve, the three pipe interfaces of the three-way valve being respectively connected to a drug injection syringe, a suction syringe and an infusion device, the infusion device including a PICC catheter interface and a connecting tube, the connecting tube having a flow regulation component inside its cavity and a knob component outside the connecting tube; the flow regulation component including: a straight tube fixed in the middle of the connecting tube and an adjusting plate rotating in the middle of the straight tube, the top and bottom surfaces of the adjusting plate both having conical guide surfaces, and the circumference of the adjusting plate having multiple edge micro-holes; when the adjusting plate is rotated to be perpendicular to the fluid direction, it blocks the main flow channel of the straight tube, forcing all the thrombolytic drug flowing through to pass through the edge micro-holes, decomposing a concentrated flow into multiple fine jets adhering to the wall, optimizing the initial distribution of the thrombolytic drug on the cross-section of the catheter.

[0008] In a new embodiment, an annular cavity is formed between the connecting pipe and the straight pipe, and two parallel sealing rings are fixedly installed inside the cavity.

[0009] In a new embodiment, the knob assembly includes: two outer knobs symmetrically arranged on both sides of the connecting tube; two drive rods, one end of which is fixedly connected to the left and right sides of the adjustment disc respectively, and the other end of which passes through the inner wall of the connecting tube and is connected to the corresponding outer knob; the outer knobs are provided with direction indicators; the drive rods are located between two sealing spacers, and one side of the drive rod is provided with two positioning hemispherical grooves distributed at right angles, and the bottom of the other side of the drive rod is equipped with a first magnet.

[0010] In a new embodiment, the top of the upper sealing spacer is provided with a locking assembly for positioning the drive connecting rod. The locking assembly includes a sleeve and a locking pin. The sleeve is fixedly installed on the top of the upper sealing spacer. The locking pin slides in a groove inside the sleeve. The lower part of the locking pin passes through and slides in the upper sealing spacer. The top of the locking pin is connected to the top wall of the groove of the sleeve through a return spring. The bottom end of the locking pin is a hemispherical end, and the hemispherical end is adapted to the size of the positioning hemispherical groove on the drive connecting rod.

[0011] In a new embodiment, a flow field assist component is provided at the bottom of the lower sealing ring. The flow field assist component includes a spring collar and spring-loaded baffles. A spring collar slides in the groove at the bottom of the lower sealing ring. The inner wall of the spring collar is inclined, and second magnets are installed on both sides of the top of the spring collar. A plurality of spring-loaded baffles are distributed in a ring and slidably disposed on the lower inner wall of the straight pipe. The outward end of the spring-loaded baffles abuts against the inner wall of the spring collar. The flow field assist component is configured such that when the regulating disc is in a position not perpendicular to the fluid direction, it can be triggered to slightly protrude the spring-loaded baffles into the flow channel to provide a smoother fluid flow environment during flushing or infusion.

[0012] In a new embodiment, a sealing ring is provided inside the outer ring wall of the regulating disc. When the disc surface is perpendicular to the fluid direction, the sealing ring forms a seal with the inner wall of the straight pipe.

[0013] In a new embodiment, the lower end of the connecting pipe is equipped with a fluid inlet connector for connecting to a PICC catheter interface; the upper end of the connecting pipe is equipped with a valve pipe connector for connecting to a three-way valve.

[0014] In a new embodiment, the edge micropores are tapered channels, with the inlet diameter of the edge micropores being larger than the outlet diameter.

[0015] Beneficial effects: Compared with the prior art, the advantages of this invention are as follows: 1. This application sets a switchable adjusting disc on the drug injection path. When the adjusting disc is in a vertical position, it can transform the traditional concentrated drug flow into multiple fine streams adhering to the wall. This morphological transformation greatly increases the initial contact area and uniformity of distribution between the drug and the blockage, creating a significantly optimized physical basis for the subsequent drug infiltration process, and is expected to directly improve thrombolysis efficiency.

[0016] 2. By setting up a flow regulation component, the regulating disc blocks the main channel in a vertical position, and the gradually narrowing edge micro-holes around its periphery accelerate and focus a stream of thrombolytic drug into multiple stable and fine jets adhering to the wall. This increases the contact area between the thrombolytic drug and the blockage, allowing the thrombolytic drug to penetrate from the surface of the blockage into its interior. The fluid process is gentle and without impact. The fine jets generated are designed to promote spreading and penetration, which conforms to the absolute safety principle of gentleness and smoothness in PICC care. It is a physical enhancement of the infiltration process, not a dangerous replacement.

[0017] 3. By incorporating a knob assembly and a locking assembly, the accuracy and stability of the adjustment dial's position switching are ensured. The knob assembly ensures smooth rotation through dual-sided drive; the locking assembly, through the cooperation of the locking pin and the positioning hemispherical groove, provides a firm physical lock for the two working positions of the adjustment dial under the action of a spring, and produces clear tactile and audible feedback, making the mode switching process intuitive and reliable, and effectively preventing accidental changes in position.

[0018] 4. For the necessary standard flushing operation, this device provides safe flow field optimization. When the regulating disc switches to the parallel position, its structure can smoothly guide the water flow. To further improve the uniformity of the flow field, the flow field auxiliary components are activated in conjunction, so that the spring-loaded baffles are slightly involved in the flow channel. These spring-loaded baffles gently guide and homogenize the water flow, thereby forming a more uniform and smoother flow field. The sole function of this flow field is to gently assist in the removal of dissolved or loosened substances in the pipe cavity in an absolutely safe manner, thereby eliminating the possibility of generating any fluid patterns with stripping or scouring effects. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a schematic diagram showing the disassembled structure of the three-way valve, connecting pipe, and PICC conduit interface of the present invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the connecting pipe of the present invention.

[0022] Figure 4 This is a schematic diagram of the knob assembly structure of the present invention.

[0023] Figure 5 This is a schematic diagram of the position structure of the adjustment disc of the present invention.

[0024] Figure 6 For the present invention Figure 5 Enlarged view of the structure at point A.

[0025] Figure 7 This is a schematic diagram of the flow regulation component structure of the present invention.

[0026] Figure 8 This is a schematic diagram of the drive linkage structure of the present invention.

[0027] Figure 9 This is a schematic diagram of the adjusting disc structure of the present invention.

[0028] Figure 10 This is a schematic diagram of the flow field auxiliary component structure of the present invention.

[0029] Figure 11 This is a schematic diagram of the distribution state of the spring-loaded inclined vanes of the present invention.

[0030] Figure 12 This is a schematic diagram of the direction indicator status of the present invention.

[0031] The attached diagram is labeled as follows: 1. Three-way valve; 2. Medication syringe; 3. Aspiration syringe; 4. Piping device; 41. PICC tubing interface; 42. Connecting pipe; 421. Fluid inlet connector; 422. Valve connector; 5. Flow regulation component; 51. Straight pipe; 52. Regulating disc; 521. Sealing ring; 53. Conical guide surface; 54. Edge micropores; 55. Chamber; 56. Sealing spacer ring; 6. Knob assembly; 61. External knob; 611. Direction indicator; 62. Drive linkage; 63. Positioning hemispherical groove; 64. First magnet; 7. Locking assembly; 71. Sleeve; 72. Locking pin; 8. Flow field auxiliary components; 81. Spring collar; 82. Spring inclined vane; 83. Second magnet. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] This application provides a PICC thrombolysis nursing device that solves the problem in existing PICC thrombolysis nursing where the single flow channel cannot actively adjust the fluid pattern to optimize the initial distribution of thrombolytic drugs and the uniformity of the flushing flow field. In use, the adjustable disc with switchable positions decomposes the drug into fine streams adhering to the wall in the vertical position to achieve more uniform and rapid initial wetting; in the horizontal position, it switches to unobstructed mode to ensure that it does not affect subsequent standard flushing operations.

[0034] The technical solutions in this application are intended to solve the above-mentioned technical problems, and the overall approach is as follows.

[0035] Example 1, please refer to Figures 1-12This application provides a PICC thrombolysis nursing device, including a three-way valve 1. The three-way valve 1 has three tubing ports connected to a drug injection syringe 2, a suction syringe 3, and an infusion device 4, respectively. The infusion device 4 includes a PICC catheter interface 41 and a connecting tube 42. A flow regulation component 5 is provided inside the cavity of the connecting tube 42, and a knob component 6 is provided outside the connecting tube 42. The flow regulation component 5 includes a straight tube 51 fixed in the middle of the connecting tube 42 and an adjusting disc 52 that is sealed and rotated in the middle of the straight tube 51. The top and bottom surfaces of the regulating disc 52 are provided with conical guide surfaces 53, and multiple edge micro-holes 54 are opened in a ring around the periphery of the regulating disc 52. The knob assembly 6 drives the regulating disc 52 to rotate, giving it two working states: when the surface of the regulating disc 52 is rotated to be perpendicular to the fluid direction, it blocks the main channel of the straight pipe 51, forcing all the thrombolytic fluid flowing through to pass through the edge micro-holes 54, decomposing a concentrated flow into multiple fine jets adhering to the wall, and optimizing the initial distribution of the thrombolytic fluid on the cross-section of the conduit.

[0036] Furthermore, a sealing ring 521 is provided inside the outer ring wall of the regulating disc 52. When the disc surface of the regulating disc 52 is perpendicular to the fluid direction, the sealing ring 521 forms a seal with the inner wall of the straight pipe 51.

[0037] In a preferred embodiment of this solution, the present application provides an optimized fluid physics for the core nursing step, namely the injection of thrombolytic solution, through a switchable operating position adjustment disc 52. When the disc surface of the adjustment disc 52 is perpendicular to the flow channel, it can decompose the thrombolytic solution into multiple fine streams adhering to the wall, greatly increasing the contact area between the solution and the blockage, thereby significantly promoting the initial wetting efficiency. When the disc surface of the adjustment disc 52 is parallel to the flow channel, it restores the flow channel to be unobstructed, ensuring that the device will not have any adverse effects or introduce risks to the standard flushing operation that must follow the principle of gentleness and smoothness.

[0038] Specifically, the operating procedure of the PICC thrombolysis nursing device in this application is as follows: First, in use, the three ports of the three-way valve 1 are connected to the drug syringe 2 (containing urokinase solution), the aspiration syringe 3 (used to establish negative pressure), and the infusion device 4, respectively. The connecting tube 42 of the infusion device 4 is connected to the PICC catheter interface 41 through the liquid inlet connector 421, and then connected to the three-way valve 1 through the valve tube connector 422, thereby completing the assembly. Second, firstly, the medical staff rotates the three-way valve 1 to connect the aspiration syringe 3 with the infusion device 4, and pulls back the piston of the aspiration syringe 3 to create negative pressure inside the PICC catheter and the entire cavity of its extension to the connecting tube 42 (that is, inside the straight tube 51). Subsequently, medical staff rotate the external knobs 61 on both sides of the connecting tube 42. The external knobs 61 drive the adjusting disc 52 to rotate via the drive rod 62 until its surface is perpendicular to the fluid flow direction (i.e., thrombolysis optimization mode). The direction indicator 611 on the external knobs 61 can help medical staff confirm that the mode has been switched to the correct position (see reference). Figure 12 The arrow markings 12-1 and 12-2 indicate that the adjustment disc 52 is vertical (vertical in 12-1) and horizontal (horizontal in 12-2). Simultaneously, when the drive linkage 62 rotates to this position, a positioning hemispherical groove 63 on its body rotates to the underside of the locking assembly 7. Under the action of the return spring, the hemispherical end of the locking pin 72 enters the positioning hemispherical groove 63, producing a slight clicking sound, indicating that the drive linkage 62 is locked and the internal adjustment disc 52 is reliably locked in the vertical position, ready to perform optimized drug injection. Based on the above operations, medical personnel can switch modes through tactile, visual, and auditory sensations. At the same time, in this position, the sealing ring 521 inside the outer ring wall of the adjustment disc 52 tightly seals against the inner wall of the straight pipe 51, blocking the main flow channel of the straight pipe 51. Third, the medical staff continue to operate the three-way valve 1, switching to connect the drug syringe 2 and the infusion device 4. Since a negative pressure is pre-set inside the catheter, the drug solution will be automatically drawn in. Because the main channel of the straight tube 51 is blocked by the vertical regulating plate 52, the drug solution is forced to pass through multiple peripheral micro-holes 54 annularly opened around the regulating plate 52. These peripheral micro-holes 54 are tapered channels with large inlets and small outlets, which decompose the thrombolytic drug solution into multiple stable, fine jets. These fine streams flow close to the inner wall of the straight tube 51 (i.e., wall-adhering fine streams), thereby maximizing the contact area and evenly covering and wetting the surface of the blockage inside the PICC catheter, laying the optimal physical foundation for subsequent biochemical thrombolytic action. This process is smooth, involving only a change in morphology without any impact. After the drug solution is infused, maintain this connection state, allowing the urokinase to remain in the catheter for 15–30 minutes to fully exert its thrombolytic effect. Fourth, after thrombolysis is completed, the subsequent flushing procedure is performed as follows: First, operate the three-way valve 1 to connect the drug syringe 2 (which has now been replaced with saline) to the atmosphere to safely release the negative pressure in the catheter lumen. Then, the medical staff rotates the external knob 61. This action drives the connecting rod 62 to rotate the adjusting plate 52 ninety degrees, making its surface parallel to the fluid direction, thus entering the flushing compatibility mode. At the same time, the locking pin 72 of the locking component 7 will fall into another positioning hemispherical groove 63 to lock, providing a sense of confirmation of positioning. Meanwhile, when the drive link 62 rotates to this compatible position, the first magnet 64 on the other side of the drive link 62 rotates to the lowest position. The sealing ring 56 at the lower part and the flow field auxiliary component 8 generate a magnetic repulsion effect. The first magnet 64 and the second magnet 83 installed on the top of the spring collar 81 generate a magnetic repulsion effect with the same pole. This magnetic force pushes the spring collar 81 to slide downward. As the spring collar 81 is repelled downward by the magnetic force, its inclined inner wall will squeeze multiple annularly distributed spring oblique flow plates 82. After being squeezed, the spring oblique flow plates 82 that are sealed and slid into the inner wall of the straight pipe 51 extend out, slide towards the central axis of the straight pipe 51 and bulge, partially intervening in the main flow channel. This linkage action is intended to provide a slightly smoother fluid environment for the upcoming pipe flushing operation. It should be noted that the first magnets 64 on the left and right drive linkages 62 form a symmetrical magnetic force layout, which ensures that the downward repulsive force on the top left and right sides of the spring collar 81 is balanced and vertical, thereby ensuring its stable sliding downward movement. It should also be noted that the generated magnetic repulsive force is sufficient to overcome the spring force on the spring collar 81 when it slides down. Subsequently, following standard and safe pulse flushing procedures, medical staff pushed the syringe piston, allowing saline solution to flow actively through the three-way valve 1 and into the connecting tube 42. As the saline solution flowed through the parallel regulating plate 52, it was smoothly guided. The water flow continued downwards, and as it passed through the slightly raised spring-loaded inclined plate 82, it was further gently homogenized. This was intended to create a more uniform and stable laminar or low-shear flow field for the flushing fluid. The function of this flow field was to assist in the removal of substances dissolved or loosened by thrombolytic drugs in an absolutely safe manner, and to ensure that the flushing fluid could uniformly cover the lumen. The effectiveness of the entire flushing process primarily depends on standard operating procedures. The role of this device at this stage is to provide optimized and safe fluid physics conditions, clearly eliminating the possibility of impact, turbulence, or mechanical stripping. Fifth, after completing the flushing process, negative pressure can be applied to the device to verify the flowability of the conduit. Once the flow is confirmed to be good, the final flushing and sealing steps can be performed according to the standard operating procedure to complete the unblocking and maintenance operation of the conduit.

[0039] In summary, the core value of this device, through its switchable adjustment disc 52 design, lies in significantly optimizing the physical morphology of the drug injection stage during PICC thrombolysis, transforming the coarse flow into a fine flow adhering to the wall to promote efficient wetting. This is the core and clearly beneficial function. For the indispensable subsequent flushing step, the design principle of this device is to switch to a compatible mode to ensure no interference and to slightly optimize the standard operating procedure within a safe range.

[0040] Please see Figure 4 and Figure 5An annular cavity 55 is formed between the connecting pipe 42 and the straight pipe 51, and two parallel sealing rings 56 are fixedly installed inside the cavity 55.

[0041] In the preferred embodiment of this solution, by setting up a cavity 55 and sealing rings 56, the cavity 55 physically isolates the movement space of the locking component 7 and the flow field auxiliary component 8 from the main fluid channel, protecting each component from fluid interference and corrosion. At the same time, the two parallel sealing rings 56 also provide a stable and limited rotation space for the drive linkage 62, ensuring the accuracy and reliability of its rotational movement, and enabling better coordination and linkage with the locking component 7 and the flow field auxiliary component 8.

[0042] Please see Figures 3-8 The knob assembly 6 includes: two outer knobs 61, symmetrically arranged on both sides of the connecting tube 42; two drive rods 62, one end of which is fixedly connected to the left and right sides of the adjusting plate 52 respectively, and the other end of which passes through the inner wall of the connecting tube 42 and is connected to the corresponding outer knob 61; the outer knobs 61 are provided with direction indicators 611; the drive rods 62 are located between two sealing rings 56, and one side of the drive rod 62 is provided with two positioning hemispherical grooves 63 distributed at right angles, and the bottom of the other side of the drive rod 62 is provided with a first magnet 64.

[0043] In a preferred embodiment of this solution, by setting an external knob 61 and a drive linkage 62, the external knob 61 is rotated to drive the drive linkage 62 to rotate synchronously, thereby driving the connected adjustment plate 52 to rotate inside the straight pipe 51, ensuring that the adjustment plate 52 can switch between two functional states (thrombolysis optimization and flushing compatibility) inside the straight pipe 51. Secondly, the direction indicator 611 on the external knob 61 allows medical staff to confirm that the adjustment disc 52 has accurately reached the predetermined working position through a triple sense of sight (observing the indicator) and touch and hearing (feeling the click of the locking pin 72 falling into the positioning groove), reducing the risk of operation failure due to inaccurate position. Meanwhile, the first magnet 64 installed on the drive linkage 62 transforms the rotational motion into a signal trigger that can control the flow field auxiliary component 8. When the adjustment disk 52 rotates to the flushing compatibility position, the first magnet 64 rotates to the position where it is magnetically coupled with the flow field auxiliary component 8. The flow field auxiliary component 8 is activated through magnetic repulsion, thereby realizing the automatic and safe linkage between the flow field optimization function and the flushing operation.

[0044] Please see Figure 5 and Figure 8The upper sealing spacer 56 has a locking component 7 at its top for positioning the drive link 62. The locking component 7 includes a sleeve 71 and a locking pin 72. The sleeve 71 is fixedly installed on the top of the upper sealing spacer 56. The locking pin 72 slides in the groove inside the sleeve 71. The lower part of the locking pin 72 passes through and slides in the upper sealing spacer 56. The top of the locking pin 72 is connected to the top wall of the groove of the sleeve 71 through a return spring. The bottom end of the locking pin 72 is a hemispherical end, and the hemispherical end is adapted to the size of the positioning hemispherical groove 63 on the drive link 62.

[0045] In the preferred embodiment of this solution, by setting up a sleeve 71 and a locking pin 72, and using a return spring to continuously apply force, the hemispherical end of the bottom of the locking pin 72 is stably embedded in the positioning hemispherical groove 63 of the drive connecting rod 62. This provides a reliable physical lock for the two working positions of the regulating disc 52: vertical (thrombolysis optimization) and parallel (flushing compatibility). This locking mechanism can effectively resist minor rotations caused by pipeline vibration or accidental contact, ensuring that the regulating disc 52 maintains angular stability during critical operation stages, thereby ensuring the certainty of the fluid output pattern and the safety of operation. In addition, during the mode switching process of rotating the outer knob 61, after the hemispherical end of the locking pin 72 disengages from the upper positioning hemispherical groove 63, it will slide along the surface of the drive linkage 62 until it quickly falls into the lower hemispherical groove under the action of the return spring. This action is accompanied by a noticeable click and a slight sound, forming a dual feedback of tactile and auditory senses, which significantly improves the accuracy of operation and the human-computer interaction experience.

[0046] Please see Figure 5 , Figure 6 , Figure 10 and Figure 11 The lower sealing ring 56 has a flow field auxiliary component 8 at its bottom, which includes a spring collar 81 and a spring-loaded baffle 82. The spring collar 81 slides in the groove at the bottom of the lower sealing ring 56. The inner wall of the spring collar 81 is inclined, and a second magnet 83 is installed on both sides of the top of the spring collar 81. Multiple spring-loaded baffles 82 are distributed in a ring and slidably disposed on the lower inner wall of the straight pipe 51. The outward end of the spring-loaded baffle 82 abuts against the inner wall of the spring collar 81. The flow field auxiliary component 8 is configured such that when the regulating disk 52 is in a position that is not perpendicular to the fluid direction, it can be triggered to make the spring-loaded baffle 82 slightly protrude into the flow channel, so as to provide a smoother fluid flow environment when flushing or infusing.

[0047] In the preferred embodiment of this solution, the linkage between the flow field auxiliary component 8 and the knob component 6 is achieved by utilizing the magnetic coupling between the first magnet 64 and the second magnet 83. The flow field auxiliary component 8 is automatically activated only when the adjustment disk 52 is switched to the flushing compatibility state. When the adjustment disk 52 is in the thrombolysis mode, it remains completely retracted and silent. This automatic triggering mechanism for mode switching ensures that the spring inclined flow plate 82 will not interfere with the wall-adhering fine flow formed by the thrombolysis solution, thereby achieving that the core function and the auxiliary function do not interfere with each other. When the flow field assist component 8 is activated, the spring collar 81 is driven downward by magnetic force, and pushes the annularly distributed spring baffles 82 to bulge towards the center of the flow channel through its inclined inner wall. These bulging spring baffles 82 gently guide and homogenize the water flow, with the aim of forming a smoother and more uniform flow field to assist subsequent flushing operations under safe conditions, rather than generating turbulence with a stripping effect. It is important to note that the upstream surface of each spring-loaded oblique flow vane 82 is designed with a gentle curve. When the flushing fluid flows through it, the water flow is divided into multiple streams. The convexity is controlled by structural limits, and the curvature of the surface is gentle. Therefore, this division effect is mild and aims to guide the fluid rather than generate violent disturbances. Secondly, in simple straight pipe flow, due to fluid viscosity and pipe wall friction, the flow velocity is fastest at the center of the pipe and slowest near the pipe wall. This uneven velocity distribution may cause the flushing fluid to cover the center of the pipe cavity more strongly than the pipe wall. The slightly convex spring-loaded oblique flow vane 82 can moderately guide this. The flow velocity distribution directs some of the momentum of the central fluid to the near-wall region, thereby making the flow velocity distribution more uniform across the entire cross-section. Based on this, the annular arrangement and tilting angle of the spring-loaded baffles 82 are designed to guide the fluid to generate a smooth, unidirectional micro-guided flow. These flow streams coordinate with each other, helping to suppress random and disordered disturbances. The result is a more stable and uniform flow state, allowing the flushing fluid to flow through the lumen at a more uniform speed and with a smoother posture, eliminating the generation of local high-pressure jets or high-intensity eddies, and avoiding the harm of flushing to the patient.

[0048] Please see Figure 4 and Figure 5 The lower end of the connecting pipe 42 is equipped with a fluid inlet 421 for connecting to the PICC conduit interface 41; the upper end of the connecting pipe 42 is equipped with a valve pipe connector 422 for connecting to the three-way valve 1.

[0049] In a preferred embodiment of this solution, by setting a fluid inlet connector 421 and a valve connector 422, the fluid inlet connector 421 facilitates the connection of the connecting pipe 42 to the PICC catheter interface 41, while the valve connector 422 facilitates the connection of the connecting pipe 42 to the three-way valve 1. The two connectors and the connecting pipe 42 together form a continuous flow channel, providing a processing path space for all fluid operations from thrombolytic injection to pulse flushing.

[0050] Please see Figure 9 The edge micropore 54 is a tapered channel, and the inlet diameter of the edge micropore 54 is larger than the outlet diameter.

[0051] In the preferred embodiment of this scheme, the reduction in the outlet diameter of the edge micro-hole 54 helps to focus the flow stream, decomposing the drug solution into multiple stable, fine and moderately energetic jets, effectively avoiding the flow stream dispersion or dripping that may occur at low speeds, ensuring that each stream of thrombolytic drug solution can act as an effective penetration unit, flowing closely against the tube wall, and achieving efficient and uniform wetting.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A PICC thrombolysis nursing device, comprising a three-way valve (1), wherein the three ports of the three-way valve (1) are respectively connected to a drug injection syringe (2), a suction syringe (3), and an infusion device (4), characterized in that: The tubing device (4) includes a PICC catheter interface (41) and a connecting tube (42). The connecting tube (42) is provided with a flow regulation component (5) inside its cavity and a knob component (6) outside its exterior. The flow regulation component (5) includes: A straight pipe (51) fixed in the middle of the connecting pipe (42) and an adjusting plate (52) rotating in the middle of the straight pipe (51) are provided with a cone-shaped guide surface (53) on the top and bottom surfaces of the adjusting plate (52). Multiple edge micro-holes (54) are opened in a ring around the periphery of the adjusting plate (52). When the regulating disc (52) is rotated to be perpendicular to the fluid direction, it blocks the main flow channel of the straight pipe (51), forcing all the thrombolytic drug flowing through to pass through the edge micro-holes (54), decomposing a concentrated flow into multiple fine jets adhering to the wall, thus optimizing the initial distribution of the thrombolytic drug on the cross-section of the conduit.

2. The PICC thrombolysis nursing device as described in claim 1, characterized in that, An annular cavity (55) is formed between the connecting pipe (42) and the straight pipe (51), and two parallel sealing rings (56) are fixedly installed in the cavity (55).

3. The PICC thrombolysis nursing device as described in claim 1, characterized in that, The knob assembly (6) includes: There are two external knobs (61), which are symmetrically arranged on both sides of the connecting pipe (42); The drive linkage (62) has two rods, one end of which is fixedly connected to the left and right sides of the adjustment plate (52) respectively, and the other end of which passes through the inner wall of the connecting tube (42) and is connected to the corresponding outer knob (61). The external knob (61) is provided with a direction indicator (611). The drive link (62) is located between two sealing rings (56), and two positioning hemispherical grooves (63) are provided on one side of the drive link (62) and a first magnet (64) is installed at the bottom of the other side of the drive link (62).

4. The PICC thrombolysis nursing device as described in claim 2, characterized in that, The upper sealing ring (56) is provided with a locking assembly (7) for positioning the drive link (62) at its top end. The locking assembly (7) includes a sleeve (71) and a locking pin (72). The sleeve (71) is fixedly installed on the top of the upper sealing ring (56). A locking pin (72) slides in the inner groove of the sleeve (71). The lower part of the locking pin (72) passes through and slides in the upper sealing ring (56). The top of the locking pin (72) is connected to the top wall of the groove of the sleeve (71) by a return spring; The bottom end of the locking pin (72) is a hemispherical end, and the size of the hemispherical end is adapted to the positioning hemispherical groove (63) on the drive link (62).

5. A PICC thrombolysis nursing device as described in claim 2, characterized in that, The bottom of the lower sealing ring (56) is provided with a flow field auxiliary component (8), which includes a spring collar (81) and a spring inclined plate (82). A spring collar (81) slides in the bottom groove of the lower sealing ring (56). The inner wall of the spring collar (81) is inclined, and a second magnet (83) is installed on both sides of the top of the spring collar (81). Multiple spring-loaded baffles (82) are arranged in a ring and slidably disposed on the lower inner wall of the straight pipe (51), with the outward end of each spring-loaded baffle (82) abutting against the inner wall of the spring collar (81). The flow field assist component (8) is configured to be triggered when the regulating disk (52) is in a position not perpendicular to the fluid direction, causing the spring-loaded baffle (82) to slightly bulge into the flow channel, in order to provide a smoother fluid flow environment during flushing or infusion.

6. The PICC thrombolysis nursing device as described in claim 1, characterized in that, The regulating disc (52) is provided with a sealing ring (521) inside the outer ring wall. When the disc surface of the regulating disc (52) is perpendicular to the fluid direction, the sealing ring (521) forms a seal with the inner wall of the straight pipe (51).

7. A PICC thrombolysis nursing device as described in claim 1, characterized in that, The lower end of the connecting pipe (42) is equipped with a fluid inlet (421) for connecting the PICC catheter interface (41). The upper end of the connecting pipe (42) is equipped with a valve pipe joint (422) for connecting the three-way valve (1).

8. A PICC thrombolysis nursing device as described in claim 1, characterized in that, The edge micropore (54) is a tapered channel, and the inlet diameter of the edge micropore (54) is larger than the outlet diameter.

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