Automatic thrombolysis mechanism of central venous catheter

Abstract

The invention provides a central venous catheter automatic thrombolysis mechanism which comprises a medicine feeding assembly provided with a negative pressure injector. A top plate is fixedly mounted at a top opening of the protective shell, and a strip-shaped groove is formed in the top plate; a first embedding seat and a pillow seat are fixedly mounted on the top surface of the top plate, a negative pressure injector is positioned and placed on the first embedding seat and the pillow seat, and a pushed plate is fixedly mounted at the end part of a piston rod of the negative pressure injector; the automatic push-pull mechanism is arranged in the protection shell, the automatic push-pull mechanism comprises a driving part and a push strip, the push strip penetrates through the strip-shaped groove, and the push strip extends to one side of the pushed plate; and the movable plugging mechanism is arranged in the protective shell, the top of the movable plugging mechanism covers the bottom of the strip-shaped groove, and the movable plugging mechanism is connected with the push strip. And through the arrangement of the automatic push-pull mechanism, the negative pressure injector can be automatically pushed and pulled, manual push-pull operation is avoided, and the labor intensity of medical staff is reduced.

Description

Technical Field

[0001] The present invention relates to the field of central venous catheters, in particular to an automatic thrombolysis mechanism for central venous catheters. Background Art

[0002] A central venous catheter (CVC) is an important medical device typically inserted through a major vein, such as the internal jugular, subclavian, or femoral vein, with the catheter tip positioned in the superior or inferior vena cava. It is widely used clinically, playing a key role in critical care, surgical anesthesia, cancer chemotherapy, and hemodialysis.

[0003] During thrombolytic therapy for central venous catheter-related thrombosis, medical staff must repeatedly manually push and pull the syringe to achieve full contact between the thrombolytic drug and the thrombus. This is the core operation to improve thrombolytic efficiency. Through intermittent negative pressure aspiration and pulsed injection, the drug can penetrate into the thrombus and disintegrate the fibrin structure, while loosening detached thrombus debris and restoring catheter patency. However, this operation takes dozens of minutes and relies on manual force, which significantly increases the labor intensity of medical staff and may cause operator fatigue or reduced efficiency. Summary of the Invention

[0004] The present invention provides an automatic thrombolysis mechanism for a central venous catheter in order to solve the technical problem that the thrombolysis process requires repeated pushing and pulling of a negative pressure syringe, which causes high labor intensity for medical personnel.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides an automatic thrombolysis mechanism for a central venous catheter, comprising a drug delivery component, wherein the drug delivery component is provided with a negative pressure syringe; further comprising: a protective shell, wherein the top opening of the protective shell is fixedly mounted with a top plate, and a strip groove is opened on the top plate; a first nest and a pillow seat are fixedly mounted on the top surface of the top plate, the negative pressure syringe is positioned and placed on the first nest and the pillow seat, and a push plate is fixedly mounted on the end of the piston rod of the negative pressure syringe; an automatic push-pull mechanism, wherein the automatic push-pull mechanism is arranged inside the protective shell, the automatic push-pull mechanism comprises a driving part and a push strip, the push strip passes through the strip groove, and the push strip extends to one side of the pushed plate; a movable blocking mechanism, wherein the movable blocking mechanism is arranged inside the protective shell, and the top of the movable blocking mechanism covers the bottom of the strip groove, and the movable blocking mechanism is connected to the push strip.

[0007] In this technical solution, the automatic pushing and pulling of the negative pressure syringe is realized, avoiding the manual reciprocating pushing and pulling operations of medical personnel, reducing labor intensity. At the same time, the protective shell and movable blocking mechanism are set up, so that the automatic pushing and pulling mechanism is in a closed protective environment, which has a better protective effect and prevents foreign objects or dust from entering its transmission parts, which may have an adverse effect on use.

[0008] Preferably, the drug delivery assembly includes a drug storage syringe and a three-way valve; the three ports of the three-way valve are respectively connected to the port of the drug storage syringe, the port of the negative pressure syringe and the end of one end of the central venous catheter body.

[0009] Preferably, the driving part includes a motor fixedly mounted on the outer wall of one side of the protective shell, a stud is rotatably mounted inside the protective shell, one end of the stud is fixedly connected to the output shaft of the motor, a movable nut is threadedly connected to the stud, a sliding bar is fixedly mounted on the inner wall of the protective shell, the movable nut is slidably connected to the sliding bar, and the top surface of the movable nut is fixedly connected to the bottom end of the push bar.

[0010] Preferably, the movable blocking mechanism includes a frame and a blocking belt; four rotating rollers are rotatably mounted on the frame, the blocking belt is wound around the four rotating rollers, and the top surface of the blocking belt abuts against the bottom of the strip groove; a groove is provided on the top surface of the blocking belt, the push strip passes through the groove, and the push strip is fixedly connected to the blocking belt.

[0011] In this technical solution, through the belt transmission design, the blocking belt covers the blocking strip groove, and the blocking belt is movable, which is suitable for the blocking effect when the push strip can move along the strip groove.

[0012] Preferably, the side wall of the frame is fixedly connected to a fixing seat, the bottom of the fixing seat is fixedly installed with a column, the bottom inner wall of the protective shell is fixedly installed with a fixing cylinder, the column and the fixing cylinder are slidably connected, the top end of the column is sleeved with a first spring, and the bottom surface of the fixing seat and the top end of the fixing cylinder are elastically connected by the first spring.

[0013] In this technical solution, elastic design is used to provide pressure for the sealing belt to compress the bottom of the strip groove, thereby ensuring the sealing effect.

[0014] Preferably, an elastic movable component is provided inside one side of the protective shell; the elastic movable component includes a second spring and a movable disk, one end of the second spring is fixedly connected to the inner wall of the protective shell, and the other end of the second spring is fixedly connected to the movable disk, the movable disk is fixedly connected to a pull rod, and a push seat is fixedly installed on the top of the movable nut, and the push seat faces one end of the pull rod, the pull rod passes through a first through hole provided on one side of the protective shell, and the end of the pull rod extending to the outside of the protective shell is fixedly connected to a second embedding seat, the end of the central venous catheter body is positioned on the second embedding seat, and a second embedding groove is provided on the second embedding seat.

[0015] Preferably, a first sealing sleeve is fixedly installed in the first through hole, and the first sealing sleeve is wrapped around the pull rod. A guide ring is fixedly installed in the first through hole, and the pull rod and the guide ring are slidably connected.

[0016] Preferably, a hollow stop post is fixedly mounted on the inner side wall of the protective shell, and the stop post is located on a side of the movable disk away from the push seat.

[0017] Preferably, a first embedding groove is provided on the first embedding seat, a first embedding plate is fixedly installed on the barrel of the negative pressure syringe, the first embedding plate is engaged with the first embedding groove, a positioning rod is provided on the first embedding seat, the top end of the positioning rod is slidably connected with the guide hole provided on the side wall of the first embedding seat, the positioning rod passes through the through groove provided on the top plate, and an elastic movable rod is provided at the bottom end of the positioning rod; a positioning hole adapted for the positioning rod is provided on the first embedding plate.

[0018] Preferably, the elastic movable rod includes a rod body, one end of the rod body is fixedly connected to the bottom end of the positioning rod, the rod body passes through a second through hole provided on the side wall of the protective shell, a second sealing sleeve is fixedly installed in the second through hole, the second sealing sleeve is wrapped around the rod surface of the rod body, the rod body is slidably connected to the hole body provided on one side of the blocking column, a fixing ring is fixedly installed on the part of the rod body located in the blocking column, a third spring is sleeved on the rod body, and both ends of the third spring are fixedly connected to the fixing ring and the inner side wall of the blocking column respectively.

[0019] In this technical solution, the positioning rod can be inserted into the positioning hole by the elastic force of the elastic movable rod, so as to realize automatic positioning of the negative pressure syringe before automatic thrombolysis; and after thrombolysis, the elastic movable rod is squeezed by the automatic push-pull mechanism, so that the positioning rod can be automatically pulled out of the positioning hole, realizing automatic release of positioning.

[0020] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0021] The positive progress effect of the present invention is:

[0022] The automatic thrombolysis mechanism of the central venous catheter proposed above drives the push strip to move through the driving part in the automatic push-pull mechanism, and the push strip pushes and pulls the piston rod of the negative pressure syringe to realize automatic push and pull, avoids manual push and pull operations, reduces the labor intensity of medical staff, and improves the convenience of thrombolysis treatment; at the same time, a movable blocking mechanism and a protective shell are provided, and the push strip of the automatic push-pull mechanism extends from the strip groove on the protective shell, and the strip groove provides space for the push strip to push and pull, and the movable blocking mechanism can ensure that the push strip can move along the strip groove while also always blocking the strip groove to ensure protection The protective shell provides sealed protection for the internal components to prevent dust and foreign matter from entering and affecting use; further, through the arrangement of the pillow seat, the first embedding seat and the first embedding groove, a position is provided for the negative pressure syringe to be placed, and before pushing and pulling, automatic positioning and limiting can be performed to ensure the stability of the negative pressure syringe during the thrombolysis process, and after thrombolysis, the positioning can be automatically released, making the overall use convenient; further, during the thrombolysis process, the central venous catheter can be automatically connected to the three-way valve without manual connection operation, and after thrombolysis, the central venous catheter is automatically disconnected from the three-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the present invention as a whole.

[0024] Figure 2 This is a schematic structural diagram of the negative pressure syringe of the present invention and the top plate in a disassembled state.

[0025] Figure 3 It is a structural schematic diagram of the bottom of the top plate of the present invention.

[0026] Figure 4 For the present invention Figure 3 Schematic diagram of the structure with the A part in the middle enlarged.

[0027] Figure 5 Schematic diagram of the structure inside the protective shell of the present invention.

[0028] Figure 6 It is a structural schematic diagram of the automatic push-pull mechanism, elastic movable component, blocking column and push seat of the present invention.

[0029] Figure 7 It is a structural schematic diagram of the elastic movable component and the push seat of the present invention.

[0030] Figure 8 It is a structural schematic diagram of the elastic movable rod, the positioning plug rod and the blocking column of the present invention.

[0031] Figure 9 It is a structural schematic diagram of the movable blocking mechanism of the present invention.

[0032] Figure 10 For the present invention Figure 9 Schematic diagram of the structure with the B part enlarged.

[0033] Figure 11 It is a structural schematic diagram of the second insert and the end head of the present invention.

[0034] Figure 12 It is a schematic diagram of the present invention as a whole in an initial state.

[0035] Description of Reference Numerals

[0036] 1. Drug delivery assembly; 101. Negative pressure syringe; 1011. First panel; 1012. Push plate; 1013. Positioning hole; 102. Drug storage syringe; 103. Three-way valve; 2. Protective shell; 201. First sealing sleeve; 202. Second sealing sleeve; 3. Top plate; 301. Strip groove; 302. Through groove; 4. First nest; 401. First nest; 5. Pillow seat; 6. Pull rod; 7. Second nest; 701. Second nest; 8. Central venous catheter body; 801. Terminal; 8011. Second panel; 9. Positioning rod; 10. Automatic push-pull mechanism; 1001. Push 1002, motor; 1003, stud; 1004, movable nut; 1005, slide; 11, movable blocking mechanism; 1101, blocking belt; 1102, frame; 1103, rotating roller; 1104, trough; 1105, fixing cylinder; 1106, fixing seat; 1107, column; 1108, first spring; 12, elastic movable component; 1201, second spring; 1202, movable disk; 1203, guide ring; 13, stop column; 14, push seat; 15, elastic movable rod; 1501, rod body; 1502, fixing ring; 1503, third spring. DETAILED DESCRIPTION

[0037] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0038] like Figure 1-12 As shown, the central venous catheter automatic thrombolysis mechanism includes a drug delivery component 1, wherein the drug delivery component 1 is provided with a negative pressure syringe 101; and further includes:

[0039] A protective shell 2, the top opening of which is fixedly mounted a top plate 3, and a strip groove 301 is provided on the top plate 3; a first nesting seat 4 and a pillow seat 5 are fixedly mounted on the top surface of the top plate 3, the negative pressure syringe 101 is positioned and placed on the first nesting seat 4 and the pillow seat 5, and a push plate 1012 is fixedly mounted on the end of the piston rod of the negative pressure syringe 101;

[0040] An automatic push-pull mechanism 10 is disposed inside the protective shell 2 and includes a driving portion and a push bar 1001 . The push bar 1001 passes through the strip-shaped groove 301 and extends to one side of the pushed plate 1012 .

[0041] The movable blocking mechanism 11 is disposed in the protective shell 2 , and the top of the movable blocking mechanism 11 covers the bottom of the strip-shaped groove 301 . The movable blocking mechanism 11 is connected to the push bar 1001 .

[0042] During specific implementation, the automatic push-pull mechanism 10 is driven by the driving portion to move the push bar 1001 , and the push bar 1001 pushes the piston rod of the negative pressure syringe 101 to achieve automatic push-pull.

[0043] like Figure 1 As shown, as a specific technical solution, the drug delivery component 1 includes a drug storage syringe 102 and a three-way valve 103; the three ports of the three-way valve 103 are respectively connected to the port of the drug storage syringe 102, the port of the negative pressure syringe 101 and the end 801 of the central venous catheter body 8.

[0044] During thrombolysis, the drug storage syringe 102 is used to store drugs. In traditional technical solutions, medical personnel need to repeatedly push and pull the piston rod of the negative pressure syringe 101. However, the present invention can achieve automatic pushing and pulling through the automatic pushing and pulling mechanism 10, thereby reducing the labor intensity of medical personnel.

[0045] like Figure 5-6 As shown in the figure, as a specific technical solution, the driving part includes a motor 1002 fixedly mounted on the outer wall of one side of the protective shell 2, a stud 1003 is rotatably mounted in the protective shell 2, one end of the stud 1003 is fixedly connected to the output shaft of the motor 1002, a movable nut 1004 is threadedly connected to the stud 1003, a sliding bar 1005 is fixedly mounted on the inner wall of the protective shell 2, the movable nut 1004 is slidably connected to the sliding bar 1005, and the top surface of the movable nut 1004 is fixedly connected to the bottom end of the push bar 1001. In a specific implementation, a control panel is provided on the protective shell 2 for controlling the motor 1002, and when in use, an external power supply is connected.

[0046] The specific operation of the automatic push-pull mechanism 10 is as follows: the motor 1002 drives the stud 1003 to rotate, the stud 1003 and the movable nut 1004 are threadedly transmitted, and the slide bar 1005 provides a guide for the movable nut 1004, so that the movable nut 1004 can drive the push bar 1001 to move, and the push bar 1001 pushes the pushed plate 1012, driving the piston rod of the negative pressure syringe 101 to move automatically, so as to automatically draw negative pressure without the need for manual operation by medical staff.

[0047] like Figure 5 and Figure 9 As shown, as a specific technical solution, the movable blocking mechanism 11 includes a frame 1102 and a blocking belt 1101; four rotating rollers 1103 are rotatably mounted on the frame 1102, the blocking belt 1101 is wound around the four rotating rollers 1103, and the top surface of the blocking belt 1101 is in contact with the bottom of the strip groove 301; a groove 1104 is provided on the top surface of the blocking belt 1101, the push strip 1001 passes through the groove 1104, and the push strip 1001 is fixedly connected to the blocking belt 1101.

[0048] like Figure 9 As shown, as a specific technical solution, the side wall of the frame 1102 is fixedly connected to a fixed seat 1106, the bottom of the fixed seat 1106 is fixedly installed with a column 1107, and the bottom inner wall of the protective shell 2 is fixedly installed with a fixed cylinder 1105. The column 1107 is slidably connected with the fixed cylinder 1105, and the top of the column 1107 is sleeved with a first spring 1108. The bottom surface of the fixed seat 1106 and the top of the fixed cylinder 1105 are elastically connected by the first spring 1108.

[0049] The first spring 1108 is in a compressed state. Through the compression elastic force of the first spring 1108, the top surface of the blocking belt 1101 is pressed against the bottom of the strip groove 301 to ensure the blocking of the strip groove 301; through the setting of the blocking belt 1101 and the rotating roller 1103, when the push strip 1001 moves, it drives the blocking belt 1101 to move together, thereby realizing continuous blocking of the strip groove 301 in the active state, avoiding the strip groove 301 in an open state, causing foreign matter and dust to enter, and improving the sealing and protective effect of the protective shell 2 on its internal components.

[0050] like Figure 1-7 As shown, as a specific technical solution, an elastic movable component 12 is provided inside one side of the protective shell 2; the elastic movable component 12 includes a second spring 1201 and a movable disk 1202, one end of the second spring 1201 is fixedly connected to the inner wall of the protective shell 2, and the other end of the second spring 1201 is fixedly connected to the movable disk 1202, the movable disk 1202 is fixedly connected to the pull rod 6, and a push seat 14 is fixedly installed on the top of the movable nut 1004, and the push seat 14 faces one end of the pull rod 6, the pull rod 6 passes through a first through hole opened on one side of the protective shell 2, and the end of the pull rod 6 extending to the outside of the protective shell 2 is fixedly connected to a second embedding seat 7, the end 801 of the central venous catheter body 8 is positioned on the second embedding seat 7, and a second embedding groove 701 is provided on the second embedding seat 7.

[0051] like Figure 4 and Figure 7 As shown in the figure, as a specific technical solution, a first sealing sleeve 201 is fixedly installed in the first through hole and wrapped around the tie rod 6. A guide ring 1203 is fixedly installed in the first through hole, and the tie rod 6 is slidably connected to the guide ring 1203. The first through hole provides a passage for the tie rod 6, and the guide ring 1203 is provided to guide the movement of the tie rod 6. The first sealing sleeve 201 is provided to seal the gap between the tie rod 6 and the first through hole to ensure the sealing of the first through hole.

[0052] The end of the central venous catheter body 8 connected to the three-way valve 103 is provided with a terminal 801, and the terminal 801 is provided with a second insert 8011. The terminal 801 is placed on the second insert seat 7, and the second insert 8011 on the terminal 801 is inserted into the second insert groove 701 to achieve positioning.

[0053] like Figure 6 As shown, as a specific technical solution, a hollow blocking column 13 is fixedly installed on the inner wall of the protective shell 2, and the blocking column 13 is located on the side of the movable disk 1202 away from the push seat 14.

[0054] Before the end 801 and the medicine delivery assembly 1 are positioned, the positions of the second nest 7 and the push rod 1001 are as follows: Figure 12 As shown, at this time, the push seat 14 squeezes the pull rod 6, so that the movable disk 1202 on the pull rod 6 fits on the blocking column 13, and the second spring 1201 is fully compressed. The above position state of the second nest 7 and the push strip 1001 is the initial state before the thrombolysis operation.

[0055] In the above initial state, the terminal 801 and the medicine delivery component 1 are positioned and placed. After placement, as shown in FIG. Figure 12 As shown, at this time, the end head 801 is located on the left side of the three-way valve 103, the two are not connected, and the push strip 1001 is located on the left side of the pushed plate 1012, and the two are not in contact; the automatic push-pull mechanism 10 drives the movable nut 1004 and the push seat 14 thereon to move away from the blocking column 13 until the push strip 1001 is in contact with the pushed plate 1012. During the above movement process, the compressive elastic force of the second spring 1201 drives the movable disk 1202, the pull rod 6 and the second embedded seat 7 to move together, and the second embedded seat 7 drives the end head 801 to be inserted into one end of the three-way valve 103, and through the compressive elastic force of the second spring 1201, the end head 801 is pressed against the port of the three-way valve 103 to form a connection, and the connection is automatically realized without the need for manual connection operation of the end head 801 and the three-way valve 103.

[0056] After the push strip 1001 and the pushed plate 1012 are attached, Figure 1As shown, the driving push bar 1001 continues to move, and the push bar 1001 can push the pushed plate 1012 to move, so as to drive the piston rod of the negative pressure syringe 101 to automatically push and pull. When the push and pull are repeated multiple times, the push bar 1001 is moved back and forth to the side away from the second nest 7 and back and forth as shown. Figure 1 The position shown can achieve multiple push and pull.

[0057] After the thrombolysis is completed, the push rod 1001 is driven to move to the position as shown in FIG. Figure 12 In the state shown, during the movement of the push bar 1001, the movable nut 1004 and the push seat 14 move together; the push seat 14 pushes the end of the pull rod 6 to move the pull rod 6, and at the same time the movable disk 1202 moves with the pull rod 6, and the movement of the pull rod 6 is guided by the guide ring 1203; the movable disk 1202 moves to compress the second spring 1201 until the movable disk 1202 fits with the blocking column 13; and the movement of the pull rod 6 will drive the second insert seat 7 and the end head 801 thereon to move, so that the end head 801 is separated from the three-way valve 103, and the connection is automatically released.

[0058] Through the above design, the central venous catheter body 8 can be automatically connected to and disconnected from the three-way valve 103 without manual connection operation, which provides convenience for use.

[0059] like Figure 2-4 As shown, as a specific technical solution, a first embedding groove 401 is provided on the first embedding seat 4, and a first insert plate 1011 is fixedly installed on the barrel of the negative pressure syringe 101, and the first insert plate 1011 is engaged with the first embedding groove 401. A positioning rod 9 is provided on the first embedding seat 4, and the top end of the positioning rod 9 is slidably connected with the guide hole provided on the side wall of the first embedding seat 4. The positioning rod 9 passes through the through groove 302 provided on the top plate 3, and an elastic movable rod 15 is provided at the bottom end of the positioning rod 9; a positioning hole 1013 adapted to the positioning rod 9 is provided on the first insert plate 1011.

[0060] like Figure 8 As shown, as a specific technical solution, the elastic movable rod 15 includes a rod body 1501, one end of the rod body 1501 is fixedly connected to the bottom end of the positioning rod 9, the rod body 1501 passes through a second through hole provided on the side wall of the protective shell 2, and a second sealing sleeve 202 is fixedly installed in the second through hole, and the second sealing sleeve 202 is wrapped around the rod surface of the rod body 1501, the rod body 1501 is slidably connected to the hole body provided on one side of the blocking column 13, and a fixing ring 1502 is fixedly installed on the part of the rod body 1501 located in the blocking column 13, and a third spring 1503 is sleeved on the rod body 1501, and the two ends of the third spring 1503 are respectively fixedly connected to the fixing ring 1502 and the inner wall of the blocking column 13.

[0061] In such Figure 12 When the push rod 101 is pushed and the push plate 1012 is pressed against the push rod 101, the movable plate 1202 is separated from the stop column 13, and the movable plate 1202 does not apply pressure to the end of the rod body 1501. The rod body 1501 is extended from the side of the stop column 13 by the elastic force of the third spring 1503, and the rod body 1501 drives the positioning rod 9 to move, so that the positioning rod 9 is inserted into the positioning hole 1013. In the subsequent automatic pushing and pulling process of the negative pressure syringe 101, the stability is guaranteed by the positioning effect.

[0062] After the thrombolysis is completed, the push rod 1001 is driven to move to the position as shown in FIG. Figure 12 In the state shown, during the movement of the push bar 1001, the movable disk 1202 is re-fitted against the blocking column 13, so that the part of the rod body 1501 extending from the side of the blocking column 13 is pressed into the blocking column 13, and the third spring 1503 is stretched, and the rod body 1501 moves, and the rod body 1501 drives the positioning rod 9 to move together, so that the top end of the positioning rod 9 leaves the positioning hole 1013, and the top end of the positioning rod 9 is received in the guide hole of the first nest 4, completing the automatic release of the positioning.

[0063] Through the above design, the automatic positioning of the negative pressure syringe 101 after placement and the automatic release of positioning after thrombolysis are completed are achieved, ensuring the stability of the negative pressure syringe 101 during the automatic pushing and pulling process, and automatically positioning and releasing positioning, avoiding manual operation, providing convenience for use.

[0064] The present invention is not limited to the above-described embodiments. Any changes in shape or structure fall within the scope of protection of the present invention. The scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention. Such changes and modifications shall fall within the scope of protection of the present invention.

Claims

1. An automatic thrombolysis mechanism for a central venous catheter, comprising a drug delivery component (1), wherein the drug delivery component (1) is provided with a negative pressure syringe (101); characterized in that: Also includes: A protective shell (2), wherein a top opening of the protective shell (2) is fixedly mounted with a top plate (3), and a strip-shaped groove (301) is provided on the top plate (3); a first nesting seat (4) and a pillow seat (5) are fixedly mounted on the top surface of the top plate (3), the negative pressure syringe (101) is positioned and placed on the first nesting seat (4) and the pillow seat (5), and a push plate (1012) is fixedly mounted on the end of the piston rod of the negative pressure syringe (101); An automatic push-pull mechanism (10), the automatic push-pull mechanism (10) being arranged inside the protective shell (2), the automatic push-pull mechanism (10) comprising a driving portion and a push bar (1001), the push bar (1001) penetrating the strip-shaped groove (301), and the push bar (1001) extending to one side of the pushed plate (1012); A movable blocking mechanism (11) is provided in the protective shell (2), and the top of the movable blocking mechanism (11) covers the bottom of the strip-shaped groove (301), and the movable blocking mechanism (11) is connected to the push bar (1001).

2. The automatic thrombolysis mechanism for a central venous catheter according to claim 1, characterized in that: The drug delivery assembly (1) comprises a drug storage syringe (102) and a three-way valve (103); the three ports of the three-way valve (103) are respectively connected to the port of the drug storage syringe (102), the port of the negative pressure syringe (101) and the end (801) of one end of the central venous catheter body (8).

3. The automatic thrombolysis mechanism for a central venous catheter according to claim 1, characterized in that: The driving part comprises a motor (1002) fixedly mounted on an outer wall of one side of the protective shell (2); a stud (1003) is rotatably mounted in the protective shell (2); one end of the stud (1003) is fixedly connected to the output shaft of the motor (1002); a movable nut (1004) is threadedly connected to the stud (1003); a sliding bar (1005) is fixedly mounted on the inner wall of the protective shell (2); the movable nut (1004) is slidably connected to the sliding bar (1005); and the top surface of the movable nut (1004) is fixedly connected to the bottom end of the push bar (1001).

4. The automatic thrombolysis mechanism for a central venous catheter according to claim 1, characterized in that: The movable blocking mechanism (11) comprises a frame (1102) and a blocking belt (1101); four rotating rollers (1103) are rotatably mounted on the frame (1102); the blocking belt (1101) is wound around the four rotating rollers (1103), and the top surface of the blocking belt (1101) abuts against the bottom of the strip groove (301); a groove (1104) is provided on the top surface of the blocking belt (1101); the push strip (1001) passes through the groove (1104), and the push strip (1001) is fixedly connected to the blocking belt (1101).

5. The automatic thrombolysis mechanism for a central venous catheter according to claim 4, characterized in that: The side wall of the frame (1102) is fixedly connected to a fixing seat (1106), the bottom of the fixing seat (1106) is fixedly installed with a column (1107), the bottom inner wall of the protective shell (2) is fixedly installed with a fixing cylinder (1105), the column (1107) and the fixing cylinder (1105) are slidably connected, the top end of the column (1107) is sleeved with a first spring (1108), and the bottom surface of the fixing seat (1106) and the top end of the fixing cylinder (1105) are elastically connected via the first spring (1108).

6. The automatic thrombolysis mechanism for a central venous catheter according to claim 3, characterized in that: An elastic movable component (12) is provided inside one side of the protective shell (2); the elastic movable component (12) includes a second spring (1201) and a movable disk (1202), one end of the second spring (1201) is fixedly connected to the inner wall of the protective shell (2), and the other end of the second spring (1201) is fixedly connected to the movable disk (1202), and the movable disk (1202) is fixedly connected to a pull rod (6), and a push seat (14) is fixedly installed on the top of the movable nut (1004), and the push seat (14) faces one end of the pull rod (6), and the pull rod (6) passes through a first through hole provided on one side of the protective shell (2), and the end of the pull rod (6) extending to the outside of the protective shell (2) is fixedly connected to a second embedding seat (7), and the end (801) of the central venous catheter body (8) is positioned on the second embedding seat (7), and a second embedding groove (701) is provided on the second embedding seat (7).

7. The automatic thrombolysis mechanism for a central venous catheter according to claim 6, characterized in that: A first sealing sleeve (201) is fixedly installed in the first through hole, and the first sealing sleeve (201) is wrapped around the pull rod (6). A guide ring (1203) is fixedly installed in the first through hole, and the pull rod (6) and the guide ring (1203) are slidably connected.

8. The automatic thrombolysis mechanism for a central venous catheter according to claim 6, characterized in that: A hollow blocking column (13) is fixedly mounted on the inner side wall of the protective shell (2), and the blocking column (13) is located on a side of the movable disk (1202) away from the push seat (14).

9. The automatic thrombolysis mechanism for a central venous catheter according to claim 8, characterized in that: A first embedding groove (401) is provided on the first embedding seat (4), a first insert plate (1011) is fixedly installed on the barrel of the negative pressure syringe (101), the first insert plate (1011) is engaged with the first embedding groove (401), a positioning rod (9) is provided on the first embedding seat (4), the top end of the positioning rod (9) is slidably connected with the guide hole provided on the side wall of the first embedding seat (4), the positioning rod (9) passes through the through groove (302) provided on the top plate (3), and an elastic movable rod (15) is provided at the bottom end of the positioning rod (9); a positioning hole (1013) adapted for the positioning rod (9) is provided on the first insert plate (1011).

10. The automatic thrombolysis mechanism for a central venous catheter according to claim 9, characterized in that: The elastic movable rod (15) includes a rod body (1501), one end of the rod body (1501) is fixedly connected to the bottom end of the positioning rod (9), the rod body (1501) passes through a second through hole provided on the side wall of the protective shell (2), a second sealing sleeve (202) is fixedly installed in the second through hole, the second sealing sleeve (202) is wrapped around the rod surface of the rod body (1501), the rod body (1501) is slidably connected to the hole body provided on one side of the blocking column (13), a fixing ring (1502) is fixedly installed on the part of the rod body (1501) located in the blocking column (13), a third spring (1503) is sleeved on the rod body (1501), and the two ends of the third spring (1503) are fixedly connected to the fixing ring (1502) and the inner wall of the blocking column (13) respectively.

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