Three-way valve type PICC (peripherally inserted central catheter) incision device

Abstract

The invention relates to the technical field of medical PICC (Peripherally Inserted Central Catheter) incision equipment, in particular to a three-way valve type PICC incision device which comprises a mounting table, a transverse moving mechanism arranged on the mounting table, a cutting knife arranged on the transverse moving mechanism and a bearing mechanism which is arranged on the mounting table and corresponds to the cutting knife, the bearing mechanism comprises a lifting mechanism, a positioning seat arranged on the lifting mechanism, a pipe inserting hole formed in the positioning seat, a knife avoiding seam and a pipe pressing notch formed in the upper end of the positioning seat, a pipe pressing frame arranged on the mounting table, a pipe pressing plate arranged on the pipe pressing frame and a knife avoiding opening formed in the pipe pressing plate. According to the design, the PICC catheter can be cut, the cutting precision and efficiency are greatly improved, the structure is not complex, the size is small, cost is low, and operation is stable.

Description

Technical Field

[0001] The invention relates to the technical field of medical PICC catheter incision equipment, and in particular to a three-way valve type PICC catheter incision device. Background Art

[0002] The three-way valve PICC catheter is a device that can be inserted into the large vein near the heart through peripheral arm vein puncture. There is an opening on the side of the end with a three-way valve. This three-way valve can be closed, opened inwards or outwards under different pressures, thereby preventing blood reflux, air embolism and lumen blockage. It is widely used in clinical treatment.

[0003] Existing cutting devices generally cut or annularly cut medical catheters, while the three-way valve PICC catheter requires a long incision to be cut on one side of the catheter that does not penetrate the tube wall on the other side. Manual operation is usually required, and the incision specifications are difficult to unify, resulting in poor processing accuracy and low efficiency of the three-way valve PICC catheter, which is very time-consuming and labor-intensive. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a three-way valve PICC catheter incision device, which can make incisions on PICC catheters, greatly improving the accuracy and efficiency of the incisions, and has a simple structure, small size, low cost and stable operation.

[0005] The technical solution adopted by the present invention is to provide a three-way valve type PICC catheter incision device, including a mounting platform, a transverse movement mechanism arranged on the mounting platform, a cutting knife arranged on the transverse movement mechanism, and a bearing mechanism arranged on the mounting platform and corresponding to the cutting knife, wherein the bearing mechanism includes a lifting mechanism, a positioning seat arranged on the lifting mechanism, a tube insertion hole arranged on the positioning seat, a knife avoidance slit and a tube pressing notch arranged at the upper end of the positioning seat, a tube pressing rack arranged on the mounting platform, a tube pressing plate arranged on the tube pressing rack, and a knife avoidance opening arranged on the tube pressing plate; The positioning seat is located at the upper end of the lifting mechanism and has the freedom to be lifted and lowered toward the cutting knife with the help of the lifting mechanism. The tube insertion hole corresponds to the cutting knife up and down and is parallel to the lateral movement trajectory of the cutting knife. The knife avoidance slit is located at the upper end of the positioning seat and is parallel to the tube insertion hole. The lower end of the knife avoidance slit is connected to the upper end of the tube insertion hole and the width of the knife avoidance slit is smaller than the inner diameter of the tube insertion hole. The tube pressing notch is located on the rear side of the upper end surface of the positioning seat. The bottom surface of the tube pressing notch intersects with the upper part of the tube insertion hole and exposes the inner cavity of the tube insertion hole. The tube pressing plate corresponds to the tube pressing notch up and down. The width of the knife avoidance opening is smaller than the inner diameter of the tube insertion hole and the lower end corresponds to the tube insertion hole. The tip of the cutting knife is downward and extends into the knife avoidance opening, and the blade end faces the knife avoidance slit.

[0006] The tip of the cutting knife is flush with the lower end surface of the tube pressing plate.

[0007] After the bottom surface of the tube pressing notch intersects with the upper side of the tube insertion hole, the proportion of the tube insertion hole cut off is not higher than one half and not lower than one fifth.

[0008] The tube pressing plate is annular in structure, and the knife-avoiding opening is arranged on the front end of the tube pressing plate.

[0009] The transverse movement mechanism includes a transverse movement bracket, a transverse movement cylinder arranged on the transverse movement bracket and a knife seat arranged at the front end of the transverse movement cylinder. The driving end of the transverse movement cylinder is horizontally forward and fixed to the knife seat. The cutting knife is fixed on the knife seat with the tip of the knife vertically downward and the blade end forward. The transverse movement cylinder drives the knife seat to move forward and drives the cutting knife to move synchronously.

[0010] The knife holder is provided with a knife mounting mechanism, which includes a positioning hole arranged on the cutting knife, a positioning column and a fixed pressure plate arranged on the outer end surface of the knife holder, and a wall opening arranged on the fixed pressure plate and corresponding to the positioning column. The outer end surface of the knife holder is parallel to the insertion hole, the positioning column and the positioning hole are adapted, and the cutting knife is mounted on the positioning column by means of the positioning hole and is pressed and fixed by the fixed pressure plate.

[0011] The lifting mechanism comprises a lifting cylinder arranged on the mounting platform and a lifting seat arranged on the driving end of the lifting cylinder. The driving end of the lifting cylinder faces upward and is fixed to the lower end of the lifting seat. The positioning seat is fixed to the upper end of the lifting seat.

[0012] The front end of the insertion hole is provided with a bell mouth.

[0013] The beneficial effect of the present invention is that a three-way valve type PICC catheter incision device is provided, the groove bottom of the tube pressing notch is tangent to the upper side of the tube insertion hole, the upper side of the catheter in the tube insertion hole can be exposed, and it is convenient to observe, and the opening above the tube insertion hole is small, so that the catheter will not be lifted from the tube insertion hole and is still limited in the tube insertion hole, the lower end surface of the tube pressing plate is pressed against the groove bottom of the tube pressing notch and pressed on the upper side of the catheter, and the catheter in the tube insertion hole is pressed tightly, when the cutting knife is inserted, the catheter will not rotate, deviate or deform in the tube insertion hole after being stressed, the tube insertion hole cooperates with the tube pressing notch and the tube pressing plate, and the soft catheter can be stably limited without causing damage to the catheter, and the cutting knife is located at the knife avoidance position of the tube pressing plate, so that the cutting knife is inserted at the position where the tube pressing plate presses the catheter, and the insertion can be more accurate, and the situation that the catheter is forced to deviate is further avoided, and the knife avoidance slit can avoid the cutting knife and does not hinder the translational cutting of the cutting knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the lifting mechanism of the present invention; Figure 3It is a structural schematic diagram of the tube pressing plate of the present invention against the positioning seat; Figure 4 It is a structural schematic diagram of the positioning seat of the present invention; Figure 5 It is a structural schematic diagram of a cutting knife of the present invention.

[0015] In the accompanying drawings, 1 is a mounting table, 2 is a cutting knife, 3 is a positioning seat, 4 is a pipe insertion hole, 5 is a knife avoidance slit, 6 is a pipe pressing notch, 7 is a pipe pressing rack, 8 is a pipe pressing plate, 9 is a knife avoidance opening, 10 is a transverse moving bracket, 11 is a transverse moving cylinder, 12 is a knife seat, 13 is a positioning hole, 14 is a positioning column, 15 is a fixed pressing plate, 16 is a avoidance opening, 17 is a lifting cylinder, 18 is a lifting seat, 19 is a bell mouth, and 20 is a conduit. DETAILED DESCRIPTION

[0016] like Figure 1-5 As shown, the present invention provides a three-way valve type PICC catheter incision device, comprising a mounting platform 1, a lateral movement mechanism arranged on the mounting platform 1, a cutting knife 2 arranged on the lateral movement mechanism, and a bearing mechanism arranged on the mounting platform 1 and corresponding to the cutting knife 2, wherein the bearing mechanism comprises a lifting mechanism, a positioning seat 3 arranged on the lifting mechanism, a tube insertion hole 4 arranged on the positioning seat 3, a knife avoidance slit 5 and a tube pressing notch 6 arranged at the upper end of the positioning seat 3, a tube pressing rack 7 arranged on the mounting platform 1, a tube pressing plate 8 arranged on the tube pressing rack 7, and a knife avoidance 9 arranged on the tube pressing plate 8; the positioning seat 3 is located at the upper end of the lifting mechanism and has a position toward the cutting knife by means of the lifting mechanism. The freedom of the knife 2 to rise and fall, the tube insertion hole 4 corresponds to the cutting knife 2 up and down and is parallel to the lateral movement trajectory of the cutting knife 2, the knife avoidance slit 5 is located at the upper end of the positioning seat 3 and is parallel to the tube insertion hole 4, the lower end of the knife avoidance slit 5 is connected with the upper end of the tube insertion hole 4 and the width of the knife avoidance slit 5 is smaller than the inner diameter of the tube insertion hole 4, the tube pressing notch 6 is located on the rear side of the upper end surface of the positioning seat 3, the bottom surface of the tube pressing notch 6 intersects with the upper side of the tube insertion hole 4 and exposes the inner cavity of the tube insertion hole 4, the tube pressing plate 8 corresponds to the tube pressing notch 6 up and down, the width of the knife avoidance opening 9 is smaller than the inner diameter of the tube insertion hole 4 and the lower end corresponds to the tube insertion hole 4, the tip of the cutting knife 2 is downward and extends into the knife avoidance opening 9, and the blade end faces the knife avoidance slit 5.

[0017] Since the cutting knife 2 needs to be precisely controlled to only penetrate the tube wall on the upper side of the catheter 20 but not the tube wall on the lower side of the escrow tube 20, the cutting knife 2 is designed to only move horizontally but not to be raised or lowered, while the positioning seat 3 is designed to be raised or lowered, and in conjunction with the tube pressing plate 8 and the bottom surface of the tube pressing notch 6, the rising process of the positioning seat 3 is precisely positioned. In this way, there is no need to precisely control the lifting and lowering of the cutting knife 2, and the accuracy requirement for the lifting and lowering control of the positioning seat 3 is also greatly reduced.

[0018] The lateral movement mechanism drives the cutting knife 2 to move horizontally, and the lifting mechanism drives the positioning seat 3 to move up and down. When the positioning seat 3 is in a low position, the positioning seat 3 is away from the cutting knife 2 and the tube pressing plate 8. At this time, loading is carried out, that is, one end of the catheter 20 is inserted into the tube insertion hole 4 from the front end of the positioning seat 3. Since the tube pressing notch 6 is cut out along the upper part of the tube insertion hole 4 at the rear side of the upper end of the positioning seat 3, and the upper side of the tube insertion hole 4 is formed after the upper part of the tube insertion hole 4 is removed, the catheter 20 located at the tube pressing notch 6 has the upper side of the catheter 20 exposed upward and protruding from the bottom surface of the tube pressing notch 6.

[0019] At this time, the lifting mechanism drives the positioning seat 3 to rise until the tube pressing plate 8 is pressed into the tube pressing notch 6, until the tube pressing plate 8 and the bottom surface of the tube pressing notch 6 are tightly pressed to achieve precise positioning. At the same time, the tube pressing plate 8 presses the catheter 20 in the tube insertion hole 4 to tighten the catheter 20, and the upper side of the catheter 20 will be squeezed into the knife avoidance 9 of the tube pressing plate 8 to achieve further limiting of the catheter 20.

[0020] The tip of the lower end of the cutting knife 2 is located in the knife avoidance opening 9. When the tube pressing plate 8 presses the catheter 20, the tip of the cutting knife 2 pierces the upper wall of the catheter 20, and the tip of the cutting knife does not contact the lower wall of the catheter 20. During cutting, the transverse movement mechanism drives the cutting knife 2 to translate, cutting a long straight line incision in the upper wall of the catheter 20, while the lower wall of the catheter 20 remains intact.

[0021] In the present design, the knife-avoiding slit 6 is located at the upper end of the positioning seat 3, and the tube-pressing notch 6 is located at the rear half of the upper end of the positioning seat 3, and the two are connected, so as not to hinder the translational cutting of the cutting knife 2. Since the bottom surface of the tube-pressing notch 6 intersects with the upper side of the tube insertion hole 4, the upper side of the catheter 20 in the tube insertion hole 4 can be exposed, which is convenient for observation, and the opening above the tube insertion hole 4 is small, so that the catheter 20 will not be separated from the tube insertion hole 4, and still maintains a state of being limited in the tube insertion hole 4. After the lifting mechanism drives the positioning seat 3 to rise, the lower end surface of the tube pressing plate 8 is pressed against the bottom surface of the tube pressing notch 6 and pressed against the upper side of the conduit 20, which can not only achieve the pressing of the conduit 20, but also position the rising process of the lifting mechanism, thereby reducing the required accuracy of control. While the tube pressing plate 8 compresses the catheter 20, the cutting knife 2 located in the knife avoidance opening 9 penetrates into the upper tube wall of the catheter 20, so that the catheter 20 will not rotate or deviate in the tube insertion hole 4 after being subjected to force. The tube insertion hole 4 cooperates with the tube pressing notch 6 and the tube pressing plate 8 to stably limit the soft catheter 20 without causing damage to the catheter 20. The cutting knife 2 is located at the knife avoidance opening 9 of the tube pressing plate 8, so that the cutting knife 2 penetrates into the position where the tube pressing plate 8 presses the catheter 20, that is, penetrates into the most stable position after the catheter 20 is compressed, thereby ensuring that the penetration position is more accurate and further avoiding the situation where the catheter 20 deviates under force. The knife avoidance opening 6 can avoid the cutting knife 2 and does not hinder the translational cutting of the cutting knife 2.

[0022] like Figure 3 As shown, the tip of the cutting knife 2 is flush with the lower end surface of the tube pressing plate 8 .

[0023] In the present design, the tip of the cutting knife 2 is limited to be flush with the lower end surface of the tube pressing plate 8, so that the cutting knife 2 can penetrate the wall of the catheter 20 while the tube pressing plate 8 is pressed against the bottom surface of the tube pressing notch 6. If the tip of the cutting knife 2 protrudes downward from the lower end surface of the tube pressing plate 8, the cutting knife 2 will contact the catheter 20 before it is pressed, which may cause the catheter 20 to deviate. If the tip of the cutting knife 2 is retracted in the knife avoidance opening 9, after the tube pressing plate 8 is pressed against the bottom surface of the tube pressing notch 6, the cutting knife 2 may fail to penetrate the wall of the catheter 20.

[0024] The width of the knife-avoiding opening 9 of the tube pressing plate 8 shall not be greater than the inner diameter of the tube insertion hole 4, otherwise the catheter 20 cannot be pressed tightly. The knife-avoiding opening 9 shall not be smaller than the inner diameter of the tube insertion hole 4, otherwise after the tube pressing plate 8 is pressed against the bottom surface of the tube pressing notch 6, too little of the upper side of the catheter 20 is squeezed into the knife-avoiding opening 9. When the tip of the cutting knife 2 is flush with the lower end surface of the tube pressing plate 8, it is easy for the tip of the cutting knife 2 to fail to pierce the upper tube wall of the catheter 20.

[0025] The position of the tip of the cutting knife 2 is matched with the appropriate width of the knife-avoiding opening 9, so as to achieve the effect of stably cutting the upper wall of the catheter 20.

[0026] like Figure 4 As shown, after the bottom surface of the tube pressing notch 6 intersects with the upper side of the tube insertion hole 4, the proportion of the tube insertion hole 4 cut off is not higher than one half and not lower than one fifth.

[0027] The cutting position of the tube pressing notch 6 is limited, that is, the intersection position of the bottom surface of the tube pressing notch 6 and the tube insertion hole 4. After the cutting, more than half of the tube insertion hole 4 is retained, so that the upper side of the catheter 20 can be exposed without escaping from the tube insertion hole 4, and the part of the upper side of the catheter 20 that is squeezed into the knife avoidance opening 9 can meet the requirement of the cutting knife 2 piercing the upper side wall of the catheter 20.

[0028] like Figure 1 and Figure 3 As shown, the tube pressing plate 8 is annular in structure, and the knife-avoiding opening 9 is arranged on the front end of the tube pressing plate 8 .

[0029] The annular tube pressing plate 8 cooperates with the knife avoidance opening 9 at the front end to form a C-shaped structure. The opening position at the front end of the tube pressing plate 8, i.e., the position of the knife avoidance opening 9, is pressed into the tube pressing notch 6, and the hollow position of the tube pressing plate 8 can expose the catheter 20 on the tube pressing notch 6. The rear end of the tube pressing plate 8 is located outside the tube pressing notch 6, which is convenient for observing the tube pressing 20, and only the piercing position of the cutting knife 2 is pressed, so as to avoid the increase of the force area of ​​the catheter 20, resulting in increased pressing resistance and poor pressing stability.

[0030] like Figure 1 As shown, the transverse movement mechanism includes a transverse movement bracket 10, a transverse movement cylinder 11 arranged on the transverse movement bracket 10, and a knife seat 12 arranged at the front end of the transverse movement cylinder 11. The driving end of the transverse movement cylinder 11 is horizontally forward and fixed to the knife seat 12. The cutting knife 2 is fixed on the knife seat 12 with the tip of the knife vertically downward and the blade end forward. The transverse movement cylinder 11 drives the knife seat 12 to translate forward and drives the cutting knife 2 to translate synchronously.

[0031] Since there is no need to control the lifting and lowering of the cutting knife 2, and the accuracy of the translation of the cutting knife 2 is not high, a cylinder with simple control and fast translation speed is directly used as the drive of the cutting knife 2. The transverse cylinder 11 is installed horizontally, with the driving end facing forward horizontally, and the knife seat 12 is fixed on the driving end at the front end of the transverse cylinder 11. The cutting knife 2 is fixed on the knife seat 12. Under the drive of the transverse cylinder 11, the cutting knife 2 can translate to complete the cutting of the catheter 20. The movement is stable and the control is convenient.

[0032] like Figure 1 and Figure 5 As shown, the knife holder 12 is provided with a knife mounting mechanism, and the knife mounting mechanism includes a positioning hole 13 provided on the cutting knife 2, a positioning column 14 and a fixed pressure plate 15 provided on the outer end surface of the knife holder 12, and a wall opening 16 provided on the fixed pressure plate 15 and corresponding to the positioning column 14. The outer end surface of the knife holder 12 is parallel to the insertion hole 4, the positioning column 14 and the positioning hole 13 are adapted, and the cutting knife 2 is installed on the positioning column 14 by means of the positioning hole 13 and is pressed and fixed by the fixed pressure plate 15.

[0033] When installing the cutting knife 2, the tip of the cutting knife 2 is pointed vertically downward and positioned on the positioning column 14 through the positioning hole 13. At this time, the inner end face of the cutting knife 2 is in contact with the end face of the knife seat 12. The fixed pressure plate 15 is fixed to the knife seat 12 by bolts and pressed against the outer end face of the cutting knife 2. The installation is more convenient and more stable after installation. The outer end face of the knife seat 12 refers to the end face that is parallel to the insertion hole 4 and faces outward.

[0034] like Figure 1-2 As shown, the lifting mechanism includes a lifting cylinder 17 arranged on the mounting platform 1 and a lifting seat 18 arranged on the driving end of the lifting cylinder 17. The driving end of the lifting cylinder 17 is upward and fixed to the lower end of the lifting seat 18, and the positioning seat 3 is fixed to the upper end of the lifting seat 18.

[0035] Since the bottom surfaces of the tube pressing plate 8 and the tube pressing notch 6 on the positioning seat 3 are tightly pressed against each other, positioning can be achieved, so the control accuracy of the lifting drive becomes low. A low-cost and easily controlled lifting cylinder 17 is used as the lifting drive of the positioning seat 3. The driving end of the lifting cylinder 17 is vertically upward to drive the lifting seat 18 to perform lifting movement. The positioning seat 3 is synchronously lifted and lowered under the drive of the lifting seat 18.

[0036] like Figure 2 As shown, a bell mouth 19 is provided at the front end of the insertion hole 4.

[0037] The bell mouth 19 can play a guiding role when the catheter 20 is inserted into the insertion hole 4, making the insertion of the catheter 20 more convenient.

Claims

1. A three-way valve type PICC catheter incision device, comprising a mounting platform (1), a lateral movement mechanism arranged on the mounting platform (1), a cutting knife (2) arranged on the lateral movement mechanism, and a bearing mechanism arranged on the mounting platform (1) and corresponding to the cutting knife (2), characterized in that: The bearing mechanism comprises a lifting mechanism, a positioning seat (3) arranged on the lifting mechanism, a pipe insertion hole (4) arranged on the positioning seat (3), a knife avoidance slit (5) and a pipe pressing notch (6) arranged on the upper end of the positioning seat (3), a pipe pressing rack (7) arranged on the mounting platform (1), a pipe pressing plate (8) arranged on the pipe pressing rack (7), and a knife avoidance opening (9) arranged on the pipe pressing plate (8); The positioning seat (3) is located at the upper end of the lifting mechanism and has the freedom to be lifted and lowered toward the cutting knife (2) by means of the lifting mechanism. The tube insertion hole (4) corresponds to the cutting knife (2) in upper and lower parts and is parallel to the transverse movement trajectory of the cutting knife (2). The knife avoidance slit (5) is located at the upper end of the positioning seat (3) and is parallel to the tube insertion hole (4). The lower end of the knife avoidance slit (5) is connected to the upper end of the tube insertion hole (4) and the width of the knife avoidance slit (5) is smaller than the inner diameter of the tube insertion hole (4). The tube pressing notch (6) is located at the rear side of the upper end surface of the positioning seat (3). The bottom surface of the tube pressing notch (6) intersects with the upper part of the tube insertion hole (4) and exposes the inner cavity of the tube insertion hole (4). The tube pressing plate (8) corresponds to the tube pressing notch (6) in upper and lower parts. The knife avoidance opening (9) is smaller than the inner diameter of the tube insertion hole (4) and the lower end corresponds to the tube insertion hole (4). The tip of the cutting knife (2) is downward and extends into the knife avoidance opening (9), and the blade end faces the knife avoidance slit (5).

2. The three-way valve PICC catheter incision device according to claim 1, characterized in that: The tip of the cutting knife (2) is flush with the lower end surface of the tube pressing plate (8).

3. The three-way valve PICC catheter incision device according to claim 1, characterized in that: After the bottom surface of the tube pressing notch (6) intersects with the upper side of the tube insertion hole (4), the proportion of the tube insertion hole (4) that is cut off is no more than one half and no less than one fifth.

4. The three-way valve PICC catheter incision device according to claim 1, characterized in that: The tube pressing plate (8) is an annular structure, and the knife avoidance opening (9) is arranged on the front end of the tube pressing plate (8).

5. The three-way valve PICC catheter incision device according to claim 1, characterized in that: The transverse movement mechanism comprises a transverse movement bracket (10), a transverse movement cylinder (11) arranged on the transverse movement bracket (10), and a knife seat (12) arranged at the front end of the transverse movement cylinder (11); the driving end of the transverse movement cylinder (11) is horizontally forward and fixed to the knife seat (12); the cutting knife (2) is fixed on the knife seat (12) with the tip of the knife pointing vertically downward and the blade end pointing forward; the transverse movement cylinder (11) drives the knife seat (12) to move forward and drives the cutting knife (2) to move synchronously.

6. The three-way valve PICC catheter incision device according to claim 5, characterized in that: The knife seat (12) is provided with a knife mounting mechanism, the knife mounting mechanism comprising a positioning hole (13) provided on the cutting knife (2), a positioning column (14) and a fixed pressure plate (15) provided on the outer end surface of the knife seat (12), and a wall opening (16) provided on the fixed pressure plate (15) and corresponding to the positioning column (14). The outer end surface of the knife seat (12) is parallel to the insertion hole (4), the positioning column (14) and the positioning hole (13) are adapted, and the cutting knife (2) is mounted on the positioning column (14) by means of the positioning hole (13) and is pressed and fixed by the fixed pressure plate (15).

7. The three-way valve PICC catheter incision device according to claim 1, characterized in that: The lifting mechanism comprises a lifting cylinder (17) arranged on the mounting platform (1) and a lifting seat (18) arranged on the driving end of the lifting cylinder (17); the driving end of the lifting cylinder (17) is upward and fixed to the lower end of the lifting seat (18); and the positioning seat (3) is fixed to the upper end of the lifting seat (18).

8. The three-way valve PICC catheter incision device according to claim 1, characterized in that: The front end of the tube insertion hole (4) is provided with a bell mouth (19).

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