High-pressure injector for safely disassembling and assembling a catheter and catheter disassembling and assembling method thereof

Abstract

The present invention discloses a high-pressure injector for safely disassembling and assembling a catheter and a method for disassembling and assembling a catheter, and relates to the technology for disassembling and assembling medical devices and accessories. This scheme is proposed to solve the problem that manual intervention is required in the process of disassembling and assembling the catheter of the wheel-pressure type high-pressure injector in the prior art. A clamp is provided in front of the input end of the wheel-pressure mechanism, and a bubble sensor is provided at the rear of the output end; the wheel-pressure mechanism includes a tube pressing seat and a turntable arranged above the tube pressing seat, and a plurality of guide wheels and pressing wheels are arranged on the turntable at intervals; the guide wheel is used to keep the catheter in the rotation plane of the pressing wheel or to guide the catheter out of the rotation plane of the pressing wheel, and the pressing wheel is used to perform directional extrusion on the catheter after cooperating with the tube pressing seat; a tangential component is provided between the clamp and the input end of the wheel-pressure mechanism; the tangential component is used to drive the catheter to leave or reset to the rotation plane of the pressing wheel. The advantages are that the structure is simple and maintenance is convenient, and the disassembly / assembly process of the catheter is only touched by hand when the turntable is stopped, which is safe and reliable.

Description

Technical Field

[0001] The invention relates to medical equipment, in particular to a high-pressure injector for safely disassembling and assembling a catheter.

[0002] The invention also relates to a method for disassembling and assembling accessories of a medical device, and in particular to a method for disassembling and assembling a catheter of a high-pressure injector. Background Art

[0003] There are three specific technologies of wheel pressure high-pressure injector that have been disclosed: CN113289119A, CN113289120A, and CN113289121A.

[0004] like Figure 1 , Figure 2 As shown, the host 10 is provided with a plurality of medicine bottle mounting mechanisms, which are respectively connected to a multi-way connector 13 through branch pipes, and are then connected to a catheter 11 by the multi-way connector 13. The catheter 11 will be connected to the medical interface on the human body after passing through the clamp 14, the wheel pressure mechanism and the bubble sensor 16 in sequence. The clamp 14 and the bubble sensor 16 disposed before and after the wheel pressure mechanism respectively fix two points of the catheter 11, and a certain length of the pipe section between them is reserved for entering the wheel pressure mechanism. The wheel pressure mechanism generally includes a tube pressing seat 15 and a turntable 12 disposed above the tube pressing seat 15, and a plurality of guide wheels and pressing wheels are arranged at intervals on the turntable 12. The guide wheel is used to keep the catheter 11 in the rotation plane of the pressing wheel, and the pressing wheel is used to perform directionally extrusion on the catheter 11 after cooperating with the tube pressing seat 15.

[0005] After each injection, the catheter 11 and other consumables need to be disassembled and replaced, and then new consumables are reinstalled for the next patient. In order to avoid medical accidents during the working process, the catheter 11 and the wheel pressure mechanism are designed to cooperate very closely, and the catheter 11 can only be correctly disassembled / installed during the rotation of the turntable 12.

[0006] Although the turntable 12 of the wheel-type high-pressure injector does not rotate fast, the output torque is very large. The distance between the guide wheel and the pressing wheel on the turntable 12 is also very small. There is a great risk of manual separation or coupling, and it is easy to get fingers caught in it and cause accidents.

[0007] How to safely and reliably disassemble and assemble the pipe section between the clamp 14 and the bubble sensor 16 on the wheel pressure mechanism has become an urgent problem to be solved. Summary of the invention

[0008] The object of the present invention is to provide a high-pressure injector with a safe detachable catheter and a catheter detachable method thereof, so as to solve the problems existing in the above-mentioned prior art.

[0009] The high-pressure injector for safely disassembling and assembling a catheter of the present invention comprises a main machine, the main machine is provided with a wheel pressure mechanism, a clamp is provided in front of the input end of the wheel pressure mechanism, and a bubble sensor is provided at the rear of the output end; the wheel pressure mechanism comprises a tube pressing seat and a rotating disk arranged above the tube pressing seat, and a plurality of guide wheels and pressing wheels are arranged on the rotating disk at intervals; the guide wheel is used to keep the catheter in the rotating plane of the pressing wheel or to guide the catheter out of the rotating plane of the pressing wheel, and the pressing wheel is used to perform directionally extrusion on the catheter after cooperating with the tube pressing seat;

[0010] A tangential component is provided between the clamp and the input end of the wheel pressing mechanism; the tangential component is used to drive the catheter to leave or return to the rotation plane of the pressing wheel.

[0011] The tangential assembly comprises a tangential arm vertically penetrating the main machine, the head of the tangential arm is located above the turntable and is provided with a clamping cavity for driving the catheter to move; the tail of the tangential arm extends to the back of the main machine.

[0012] A mounting seat is provided at the corresponding position of the tail on the back of the main unit; an elastic reset member and a cap are provided in the mounting seat; the tail passes through the elastic reset member; one end of the elastic reset member is fixedly connected to the inside of the main unit, and the other end is fixedly connected to the cap; the free end of the tail is fixedly connected to the cap.

[0013] The tangential arm is provided with an inclined surface in the middle part of the main machine; a first push rod is provided on the outer side of the inclined surface, which is perpendicular to the tail and can slide axially in the main machine; a first push block is provided at one end of the first push rod close to the inclined surface, and the other end freely extends out of the side wall of the main machine; the inclined surface is used to cooperate with the tangential arm to move the head of the tangential arm away from the main machine.

[0014] A pushing assembly is arranged on the outer side of the input end of the wheel pressing mechanism, and the pushing assembly is used to push the catheter toward the guide wheel.

[0015] The pushing assembly includes a second push rod and a second push block; the free end of the second push block is located outside the input end of the wheel pressure mechanism, and the connecting end extends into the main unit; the second push rod can slide axially in the main unit, one end is fixedly connected to the connecting end of the second push block, and the other end freely extends out of the side wall of the main unit.

[0016] A concave surface is arranged on one side of the second push block close to the guide wheel.

[0017] A method for installing a catheter of a high-pressure injector, when the catheter is not installed in the wheel pressure mechanism of the high-pressure injector, the following steps are performed:

[0018] Fix two points of the conduit on the clamp and the bubble sensor respectively, so that a pipe section long enough to cross the turntable from below is reserved between the clamp and the bubble sensor;

[0019] The clamping cavity at the head of the tangential arm is offset from the rotation plane of the pressing wheel, and the reserved pipe section is buckled into the clamping cavity;

[0020] Start the turntable;

[0021] Reset the clamp cavity to the rotation plane of the pressing wheel, and wait for the guide wheel to guide the reserved pipe section into the rotation plane of the pressing wheel;

[0022] The installation steps are completed when the reserved pipe section is fully matched with the wheel pressure mechanism.

[0023] When the reserved pipe section cannot freely hang down and adhere to the guide wheel, the pipe section is pressed toward the guide wheel by using the pushing assembly.

[0024] A method for disassembling a catheter of a high-pressure injector, when a catheter is assembled in a wheel pressing mechanism of the high-pressure injector, the following steps are performed:

[0025] Start the turntable;

[0026] The clamping cavity at the head of the tangential arm is offset from the rotation plane of the pressing wheel, and the end plane of the guide wheel is waited for to guide the pipe section out of the rotation plane of the pressing wheel;

[0027] When the pipe section completely leaves the wheel pressure mechanism, close the turntable;

[0028] Disengage the catheter from the clamp, bubble sensor, and clamp chamber;

[0029] Reset the clamp cavity to the rotation plane of the pressing wheel to complete the disassembly steps;

[0030] The pipe section is a pipe section of the conduit that crosses the rotating disk from below between the clamp and the bubble sensor.

[0031] The high-pressure injector with a safe catheter disassembly and assembly and the catheter disassembly and assembly method thereof described in the present invention have the advantages of simple structure and convenient maintenance. The catheter disassembly / assembly process is performed only when the turntable is stopped, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a wheel pressure type high pressure injector in the prior art.

[0033] Figure 2 yes Figure 1 A partial enlarged view of the area from the confluence of the three middle pipes to the wheel pressure mechanism.

[0034] Figure 3 The present invention is a schematic structural diagram of a high-pressure injector for safely disassembling and assembling a catheter.

[0035] Figure 4 yes Figure 3 A partial enlarged view of the area from the confluence of the three middle pipes to the wheel pressure mechanism.

[0036] Figure 5 yes Figure 4 AA section view.

[0037] Figure 6 yes Figure 5 A partial enlarged view of the location of the mid-tangential component.

[0038] Figure 7 yes Figure 6 The state change diagram after pressing the first push rod.

[0039] Figure 8 yes Figure 4 Middle BB section view.

[0040] Fig. 9 It is a schematic diagram of the state where the catheter is completely separated from the wheel pressure mechanism.

[0041] Fig.10 yes Fig. 9 A stereogram after horizontal rotation at a certain angle.

[0042] Fig.11 It is a schematic diagram of the state where the catheter begins to be installed in coordination with the wheel pressure mechanism.

[0043] Fig.12 yes Fig.11 A stereogram after horizontal rotation at a certain angle.

[0044] Reference numerals:

[0045] 10-Host: 11-catheter, 12-turntable, 13-multi-way connector, 14-clamp, 15-tube holder, 16-bubble sensor;

[0046] 20-tangential assembly: 21-first push rod, 22-first push block, 23-tangential arm, 24-clamping cavity, 25-inclined surface, 26-tail, 27-cap, 28-elastic reset member, 29-mounting seat;

[0047] 30- pushing assembly: 31- second push rod, 32- second push block, 33- concave surface. DETAILED DESCRIPTION

[0048] like Figure 3-8As shown, a high-pressure injector for safely disassembling and assembling a catheter according to the present invention comprises a main unit 10, which is provided with a wheel pressure mechanism, a clamp 14 is provided in front of the input end of the wheel pressure mechanism, and a bubble sensor 16 is provided at the output end. The wheel pressure mechanism comprises a tube pressing seat 15 and a turntable 12 arranged above the tube pressing seat 15, and a plurality of guide wheels and pressing wheels are arranged at intervals on the turntable 12. The guide wheel is used to keep the catheter 11 in the rotation plane of the pressing wheel or to guide the catheter 11 out of the rotation plane of the pressing wheel, and the pressing wheel is used to perform directional extrusion on the catheter 11 after cooperating with the tube pressing seat 15. A tangential component 20 is provided between the clamp 14 and the input end of the wheel pressure mechanism. The tangential component 20 is used to drive the catheter 11 to leave or reset to the rotation plane of the pressing wheel. Its advantages are that the structure is simple and maintenance is convenient, and the disassembly / assembly process of the catheter is only touched by hand when the turntable 12 is stopped, which is safe and reliable.

[0049] The tangential assembly 20 includes a tangential arm 23 that vertically penetrates the main machine 10. The head of the tangential arm 23 is located above the turntable 12 and is provided with a clamping cavity 24 for driving the catheter 11 to move. The tail 26 of the tangential arm 23 extends to the back of the main machine 10. The purpose is to provide a specific structure of the tangential assembly 20 to achieve the technical effect of the present invention in the simplest structural manner. The driving of the catheter 11 by the tangential assembly 20 can be completed by manually pulling the tail 26 that passes through the back of the catheter 11.

[0050] A mounting seat 29 is provided on the back of the host 10 at a position corresponding to the tail 26. An elastic reset member 28 and a cap 27 are provided in the mounting seat 29. The tail 26 passes through the elastic reset member 28. One end of the elastic reset member 28 is fixedly connected to the inside of the host 10, and the other end is fixedly connected to the cap 27. The free end of the tail 26 is fixedly connected to the cap 27. The purpose is to further improve the structure of the tangential component 20, so that the clamping cavity 24 can be offset from the rotation plane by manually pressing the cap 27, and the cap 27 can be rebounded by the elastic reset member 28 to realize the reset and overlap of the clamping cavity 24 and the rotation plane. The elastic reset member 28 can be a spring.

[0051] The tangential arm 23 is provided with an inclined surface 25 in the middle of the main unit 10. A first push rod 21 is provided on the outside of the inclined surface 25, which is perpendicular to the tail 26 and can slide axially in the main unit 10. A first push block 22 is provided at one end of the first push rod 21 close to the inclined surface 25, and the other end freely extends out of the side wall of the main unit 10. The inclined surface 25 is used to cooperate with the tangential arm 23 to move the head of the tangential arm 23 away from the main unit 10. The purpose is to further optimize the basic structure of the above-mentioned tangential component 20, and use the steering effect of the clamping cavity 24 to move the force application point to the side of the main unit 10, which is more convenient to use. After pressing the first push rod 21, the first push block 22 and the inclined surface 25 can be used to achieve staggering, and the first push rod 21 can be released under the action of the elastic reset member 28.

[0052] A pushing assembly 30 is provided on the outside of the input end of the wheel pressure mechanism, and the pushing assembly 30 is used to push the catheter 11 toward the guide wheel. Since the catheter 11 is made of silicone, although it has a certain degree of softness, it cannot be completely free to bend and droop. After the catheter 11 is bent to a certain radius, there will be a large stress rebound, resulting in the inability to completely ensure a good overlap with the guide wheel during installation. After the pushing assembly 30 is provided, this technical problem can be solved, so that when the reserved pipeline is too long or the degree of bending is large, resulting in poor overlap, the pipe section can be pressed onto the guide wheel.

[0053] The pushing assembly 30 includes a second push rod 31 and a second push block 32. The free end of the second push block 32 is located outside the input end of the wheel pressing mechanism, and the connecting end extends into the host 10. The second push rod 31 can slide axially in the host 10, one end of which is fixedly connected to the connecting end of the second push block 32, and the other end freely extends out of the side wall of the host 10. The purpose is to provide a specific structure of the pushing assembly 30, so as to achieve the effect of simple structure and convenient operation.

[0054] A concave surface 33 is provided on one side of the second push block 32 close to the guide wheel, so as to further optimize the guiding effect of the push assembly 30 on the pipe section.

[0055] like Figure 9-12 As shown, in the method for installing a catheter of a high-pressure injector of the present invention, when the catheter 11 is not installed in the wheel pressure mechanism of the high-pressure injector, the following steps are performed:

[0056] Fix two points of the conduit 11 to the clamp 14 and the bubble sensor 16 respectively, so that a pipe section long enough to cross the turntable 12 from below is reserved between the clamp 14 and the bubble sensor 16;

[0057] The clamping cavity 24 at the head of the tangential arm 23 is offset from the rotation plane of the pressing wheel, and the reserved pipe section is buckled into the clamping cavity 24;

[0058] Start the turntable 12;

[0059] Reset the clamping cavity 24 to the rotation plane of the pressing wheel, and wait for the guide wheel to guide the reserved pipe section into the rotation plane of the pressing wheel;

[0060] The installation steps are completed when the reserved pipe section is fully matched with the wheel pressure mechanism.

[0061] Furthermore, when the reserved pipe section cannot hang freely and adhere to the guide wheel, the pushing assembly 30 is used to press the pipe section toward the guide wheel.

[0062] The principle of the catheter disassembly method of the high-pressure injector described in the present invention is similar to that of the installation method, both of which are to couple or detach the pipe section with the wheel pressure mechanism by changing the positional relationship between the guide wheel and the pipe section. Specifically, when the catheter 11 is installed in the wheel pressure mechanism of the high-pressure injector, the following steps are performed:

[0063] Start the turntable 12;

[0064] The clamping cavity 24 at the head of the tangential arm 23 is offset from the rotation plane of the pressing wheel, and the end plane of the guide wheel is waited for to guide the pipe section out of the rotation plane of the pressing wheel;

[0065] When the pipe section completely leaves the wheel pressing mechanism, the rotary disc 12 is closed;

[0066] Disengage the catheter 11 from the clamp 14, the bubble sensor 16 and the clamp cavity 24;

[0067] Reset the clamping cavity 24 to the rotation plane of the pressing wheel to complete the disassembly step;

[0068] The pipe section is the pipe section of the conduit 11 that crosses the turntable 12 from below between the clamp 14 and the bubble sensor 16 .

[0069] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. A high-pressure injector for safely disassembling and assembling a catheter, comprising a main unit (10), the main unit (10) being provided with a wheel pressure mechanism, a clamping member (14) being provided in front of an input end of the wheel pressure mechanism, and a bubble sensor (16) being provided in rear of an output end; the wheel pressure mechanism comprising a tube pressing seat (15) and a rotating disk (12) arranged above the tube pressing seat (15), a plurality of guide wheels and pressing wheels being arranged at intervals on the rotating disk (12); the guide wheel being used to keep the catheter (11) in a rotation plane of the pressing wheel or to guide the catheter (11) out of the rotation plane of the pressing wheel, and the pressing wheel being used to perform directionally pressing on the catheter (11) after cooperating with the tube pressing seat (15); It is characterized in that A tangential component (20) is provided between the clamp (14) and the input end of the wheel pressure mechanism; the tangential component (20) is used to drive the catheter (11) to leave or return to the rotation plane of the pressing wheel; the catheter (11) is made of silicone; The tangential assembly (20) comprises a tangential arm (23) vertically penetrating the main machine (10); the head of the tangential arm (23) is located above the turntable (12) and is provided with a clamping cavity (24) for driving the catheter (11) to move; the tail (26) of the tangential arm (23) extends to the back of the main machine (10); A mounting seat (29) is provided on the back of the main unit (10) at a position corresponding to the tail (26); an elastic reset member (28) and a cap (27) are provided in the mounting seat (29); the tail (26) passes through the elastic reset member (28); one end of the elastic reset member (28) is fixedly connected to the inside of the main unit (10), and the other end is fixedly connected to the cap (27); the free end of the tail (26) is fixedly connected to the cap (27); The tangential arm (23) is provided with an inclined surface (25) in the middle of the main machine (10); a first push rod (21) is provided on the outer side of the inclined surface (25) and is perpendicular to the tail portion (26) and can slide axially in the main machine (10); a first push block (22) is provided at one end of the first push rod (21) close to the inclined surface (25), and the other end freely extends out of the side wall of the main machine (10); the inclined surface (25) is used to cooperate with the tangential arm (23) to move the head of the tangential arm (23) in a direction away from the main machine (10).

2. A high-pressure injector with a safe detachable catheter according to claim 1, characterized in that: A pushing assembly (30) is provided on the outside of the input end of the wheel pressure mechanism, and the pushing assembly (30) is used to push the catheter (11) toward the guide wheel.

3. A high-pressure injector with a safe detachable catheter according to claim 2, characterized in that: The pushing assembly (30) comprises a second push rod (31) and a second push block (32); the free end of the second push block (32) is located outside the input end of the wheel pressure mechanism, and the connecting end extends into the main machine (10); the second push rod (31) can slide axially in the main machine (10), one end of which is fixedly connected to the connecting end of the second push block (32), and the other end of which freely extends out of the side wall of the main machine (10).

4. A high-pressure injector with a safe detachable catheter according to claim 3, characterized in that: A concave surface (33) is provided on one side of the second push block (32) close to the guide wheel.

5. A method for installing a catheter of a high-pressure injector, characterized in that: When the wheel pressing mechanism of the high-pressure injector according to claim 4 is not equipped with a catheter (11), the following steps are performed: The two points of the conduit (11) are fixed to the clamp (14) and the bubble sensor (16) respectively, so that a pipe section long enough to cross the rotating disk (12) from below is reserved between the clamp (14) and the bubble sensor (16); The clamping cavity (24) at the head of the tangential arm (23) is offset from the rotation plane of the pressing wheel, and the reserved pipe section is buckled into the clamping cavity (24); Start the turntable (12); The clamping cavity (24) is reset to the rotation plane of the pressing wheel, and the guide wheel is waited for to guide the reserved pipe section into the rotation plane of the pressing wheel; The installation steps are completed when the reserved pipe section is fully matched with the wheel pressure mechanism.

6. A high-pressure injector with a safe detachable catheter according to claim 5, characterized in that: When the reserved pipe section cannot freely hang down and adhere to the guide wheel, the pipe section is pressed toward the guide wheel using the pushing assembly (30).

7. A method for disassembling a catheter of a high-pressure injector, characterized in that: When the wheel pressing mechanism of the high-pressure injector according to claim 4 is equipped with a catheter (11), the following steps are performed: Start the turntable (12); The clamping cavity (24) at the head of the tangential arm (23) is offset from the rotation plane of the pressing wheel, and the end plane of the guide wheel is waited for to guide the pipe section out of the rotation plane of the pressing wheel; When the pipe section completely leaves the wheel pressing mechanism, the rotating disk (12) is closed; Disengaging the catheter (11) from the clamp (14), the bubble sensor (16) and the clamp cavity (24); The clamping cavity (24) is reset to the rotation plane of the pressing wheel to complete the disassembly step; The pipe section is a pipe section of the conduit (11) that crosses the rotating disk (12) from below between the clamp (14) and the bubble sensor (16).

Images