Operation cannula propeller

Abstract

The surgical intubation propeller comprises a shell, a propelling assembly, a pressing assembly and a driving assembly, a cavity is formed in the shell, a catheter inlet and a catheter outlet are formed in the two ends of the cavity, the propelling assembly and the pressing assembly are arranged in the cavity in an up-down spaced mode, and the driving assembly is used for driving the propelling assembly to move. The device further comprises a magnetic coupler, the magnetic coupler comprises a permanent magnet rotor and a copper rotor, permanent magnets with different magnetic poles are evenly arranged at the end, close to the copper rotor, of the permanent magnet rotor at intervals, and the permanent magnet rotor and the copper rotor are connected with the propelling assembly and the driving assembly respectively. The magnetic coupler is arranged between the propelling assembly and the driving assembly, and when the propelling resistance exceeds the preset maximum propelling force, the magnetic coupler slips, so that power transmission is cut off, the risk that a catheter is excessively inserted due to misoperation or unforeseen circumstances can be avoided, and the safety of an operation is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a surgical cannula pusher. BACKGROUND

[0002] In cardiac or large vessel surgery, it is often necessary to accurately insert a surgical catheter into the human body. At present, the cannulation operation mostly relies on the medical staff holding the catheter to insert into the surgical incision. This way requires high experience and skill of the operator, and the stability of hand holding and the accuracy of insertion are difficult to guarantee, and slight deviation may cause damage to the patient's blood vessel tissue.

[0003] In order to solve the above problems, Chinese patent (patent publication number: CN106110475B) discloses a hand-operated large vessel surgical cannula pusher, which comprises a handle, a rotating wheel bin fixedly installed on the upper end of the handle, a rotating wheel installed in the rotating wheel bin through a bearing, a rocking handle installed on the rotating wheel, a compression nut inserted into the upper end of the rotating wheel bin, at least two compression rods threadedly connected to the inner end of the compression nut located in the rotating wheel bin, the two ends of the compression plate made of elastic material are fixedly connected to the at least two compression rods respectively, a compression wheel is installed on the compression plate, a guide tube is arranged between the compression plate and the rotating wheel, the guide tube is installed on the bin wall of the rotating wheel bin, the axis of the guide tube is located on the tangent line of the rotating wheel, the edges of the compression wheel and the rotating wheel are provided with circular arc-shaped ring grooves matched with the surgical cannula, a long hole is arranged on the bin wall of the rotating wheel bin, and the guide tube is installed in the long hole and the inner end of the guide tube is fixedly connected to the end of the compression plate.

[0004] The cannula pusher in the above scheme replaces manual holding with mechanical transmission, and uses the rocking handle to drive the rotating wheel to push the catheter, which improves the stability and accuracy of the operation to a certain extent. However, the pushing process completely depends on the operator manually controlling the rotation speed and force of the rocking handle, and if the operator accidentally uses too much force due to sudden conditions in the operation (such as patient movement, sudden hand tremor of the operator, etc.), the device cannot limit the pushing force by itself, and there is a risk of over-inserting the catheter and causing serious damage to the patient's heart or blood vessels. SUMMARY

[0005] The present application provides a surgical cannula pusher, which can limit the maximum pushing force and prevent damage to the patient when the pushing force is too large due to accidental conditions.

[0006] To solve the above technical problems, the present application adopts the following technical scheme:

[0007] A surgical cannula thruster includes a housing, a thrusting assembly, a clamping assembly, and a driving assembly. The housing has a cavity with an inlet and an outlet at both ends. The thrusting assembly and the clamping assembly are spaced apart vertically within the cavity. The driving assembly drives the thrusting assembly. The device also includes a magnetic coupler, which comprises a permanent magnet rotor and a copper rotor. The permanent magnet rotor has permanent magnets with different magnetic poles evenly spaced at one end near the copper rotor. The permanent magnet rotor and the copper rotor are respectively connected to the thrusting assembly and the driving assembly.

[0008] As a further improvement to the above technical solution:

[0009] In at least one embodiment, the drive assembly and the copper rotor are connected to the housing via an adjusting bushing. A fixed shaft is provided on one side of the housing, and the adjusting bushing is fitted onto the fixed shaft and threadedly connected to the fixed shaft. The gap between the copper rotor and the permanent magnet rotor can be adjusted by rotating the adjusting bushing.

[0010] Furthermore, in at least one embodiment, the adjusting bushing is also provided with a locking sleeve, the locking sleeve being slidably fitted onto the adjusting bushing, and the inner sidewall of the locking sleeve being provided with a relief groove. The sidewall of the adjusting bushing is provided with through holes spaced apart circumferentially, and a limiting ball is provided in the through hole. The outer sidewall of the fixed shaft is provided with a limiting groove adapted to the limiting ball. The limiting ball can be simultaneously inserted into the through hole and the limiting groove under the action of the inner sidewall of the locking sleeve, thereby restricting the rotation of the adjusting bushing.

[0011] Furthermore, in at least one embodiment, the adjusting bushing is also provided with a spring, the adjusting bushing is provided with a stepped platform, the inner wall of the locking sleeve is provided with a protruding ring, the spring is sleeved on the adjusting bushing, and its two ends abut against the protruding ring and the stepped platform respectively.

[0012] Compared with the prior art, the present invention achieves at least the following beneficial effects: The surgical cannula pusher of the present invention, by setting a magnetic coupler between the push component and the drive component, will slip when the push resistance exceeds the preset maximum push force, thereby cutting off the power transmission. Therefore, the risk of over-insertion of the catheter due to operational errors or accidents can be avoided, and the safety of the operation can be improved. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a structural diagram of one embodiment of the present invention;

[0015] Figure 2 This is a perspective view of one embodiment of the present invention;

[0016] Figure 3 This is a cross-sectional view of an embodiment of the present invention;

[0017] Figure 4 This is a partial connection structure diagram of an embodiment of the present invention.

[0018] The following components are labeled in the diagram: 1. Housing; 2. Propulsion assembly; 3. Clamping assembly; 4. Drive assembly; 5. Magnetic coupler; 6. Adjusting bushing; 7. Locking sleeve; 8. Spring; 11. Cavity; 12. Inlet; 13. Outlet; 14. Fixed shaft; 15. Handle; 21. Propulsion wheel; 31. Pressure plate; 32. Clamping wheel; 33. Adjusting screw; 51. Permanent magnet rotor; 52. Copper rotor; 61. Through hole; 62. Limiting ball; 63. Stepped platform; 71. Clearance groove; 72. Convex ring; 111. Sliding groove; 141. Limiting groove; 142. Scale line; 151. Groove; 211. Turbine; 212. Pipe clamping groove; 311. Sliding wing; 312. T-shaped rotating groove; 331. T-shaped rotating block; 511. Worm gear. Detailed Implementation

[0019] The present application will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.

[0020] In the description of this application, it should be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.

[0021] To address the drawback of existing technologies where excessive intubation force due to unforeseen circumstances could potentially harm patients, the inventors, after careful analysis, discovered that the primary cause of this problem in existing intubation thrusters is their inability to limit the maximum thrust. Based on this analysis, the inventors have made structural improvements to the intubation thruster.

[0022] likeFigures 1-4 As shown, in order to solve the above problems, the present invention provides a surgical cannula pusher, which includes a housing 1, a pusher component 2, a clamping component 3 and a drive component 4. A cavity 11 is provided inside the housing 1, and an inlet 12 and an outlet 13 are provided at both ends of the cavity 11. The pusher component 2 and the clamping component 3 are arranged vertically and horizontally in the cavity 11. The drive component 4 is used to drive the pusher component 2 to move.

[0023] The housing 1 is the main body of the device, with an internal cavity 11 and an inlet 12 and an outlet 13 at both ends for the conduit to pass through. A fixed shaft 14 is fixed to one side of the housing 1, and scale lines 142 are engraved on the shaft. The lower end of the housing 1 is provided with a handle 15 for gripping, and its front side has a wave-shaped groove 151 that conforms to the shape of human fingers for easy gripping.

[0024] In this invention, a magnetic coupler 5 is installed between the propulsion assembly 2 and the drive assembly 4. The coupler includes a permanent magnet rotor 51 and a copper rotor 52. The permanent magnet rotor 51, near the copper rotor 52, has permanent magnets with alternating N / S poles embedded circumferentially at one end, and a worm gear 511 at the other end. The copper rotor 52 is connected to the output end of the drive assembly 4 (such as a hand crank or a micro motor). Its working principle is as follows: when the drive assembly 4 rotates, torque is transmitted without contact through the magnetic force between the copper rotor 52 and the permanent magnet rotor 51, driving the worm gear 511 to rotate.

[0025] Meanwhile, the requirements for maximum permissible propulsion force vary depending on the surgery, the patient's age, and the blood vessel. A coupler with a fixed torque value may not meet all clinical scenarios. In this invention, the drive component 4 and the copper rotor 52 are connected to the housing 1 through the adjusting bushing 6. A fixed shaft 14 is provided on one side of the housing 1. The adjusting bushing 6 is sleeved on the fixed shaft 14 and threadedly connected to the fixed shaft 14. The gap between the copper rotor 52 and the permanent magnet rotor 51 can be adjusted by rotating the adjusting bushing 6.

[0026] According to the principle of magnetic coupling, torque is inversely proportional to the size of the air gap. Therefore, the sleeve 6 can be rotated and moved along the thread of the fixed shaft 14, thereby changing the air gap between the copper rotor 52 and the permanent magnet rotor 51. Increasing the air gap reduces the transmission torque; decreasing the air gap increases the transmission torque, allowing medical personnel to preset a safe maximum propulsion force according to actual surgical needs. Optionally, the fixed shaft 14 is provided with a scale line 142. By adjusting the scale line 142 aligned with the end of the sleeve 6, the relative position between the copper rotor 52 and the permanent magnet rotor 51 and the corresponding maximum transmission torque can be indicated, making the adjustment quantifiable and visual.

[0027] To lock the adjustment position and prevent unintentional movement of the adjustment sleeve 6 during use, a locking sleeve 7 is also provided on the adjustment sleeve 6. The locking sleeve 7 is slidably fitted onto the adjustment sleeve 6, and an avoidance groove 71 is provided on the inner side wall of the locking sleeve 7. Through holes 61 are provided at intervals along the circumference of the side wall of the adjustment sleeve 6, and a limiting ball 62 is provided in the through hole 61. A limiting groove 141 adapted to the limiting ball 62 is provided on the outer side wall of the fixed shaft 14. The limiting ball 62 can be simultaneously locked into the through hole 61 and the limiting groove 141 under the action of the inner side wall of the locking sleeve 7, thereby restricting the rotation of the adjustment sleeve 6. When it is necessary to rotate the adjustment sleeve 6, it is only necessary to slide the locking sleeve 7 downward. At this time, the limiting ball 62 can enter the avoidance groove 71, and then the adjustment sleeve 6 can be rotated.

[0028] A spring 8 is also provided on the adjusting sleeve 6, which has a stepped platform 63. A protruding ring 72 is provided on the inner wall of the locking sleeve 7. The spring 8 is sleeved on the adjusting sleeve 6, with its two ends abutting against the protruding ring 72 and the stepped platform 63, respectively. When the locking sleeve 7 is released, it can be pushed back under the action of the spring 8. The inner wall of the locking sleeve 7 presses the limiting ball 62 into the limiting groove 141 on the fixed shaft 14, thereby achieving locking.

[0029] The propulsion assembly 2 includes multiple sets of propulsion wheels 21. Each propulsion wheel 21 has a groove 212 on its surface that matches the guide tube. The arc-shaped groove 212 increases the contact area between the wheel and the circular guide tube. The multiple sets of propulsion wheels 21 are synchronously connected by belts 22 to ensure the guide tube is smoothly and linearly fed in, preventing twisting or unilateral stress on the guide tube. A turbine 211 is fixedly mounted on one side of one set of propulsion wheels 21, and a worm gear 511 at the other end of the permanent magnet rotor 51 can mesh with it via the turbine 211. Thus, the power transmitted from the magnetic coupler 5 is reduced and amplified by the worm gear 511 and turbine 211 mechanism, driving all the propulsion wheels 21 to rotate synchronously, thereby propelling the guide tube through friction.

[0030] Furthermore, by using the turbine 211 and worm 511 for connection, the vertical rotation of the transmission component can be converted into the horizontal rotation of the propulsion wheel 21. At the same time, it can also reduce the output speed of the magnetic coupler 5 and increase the torque, making the crank operation easier and the propulsion smoother and more controllable. Moreover, the structure of the worm 511 and turbine 211 has a reverse self-locking characteristic, that is, the turbine 211 cannot drive the worm 511 in the reverse direction. Therefore, when the blood pressure or tissue rebound force on the catheter cannot push the propulsion wheel 21 to reverse, it prevents the catheter from accidentally withdrawing and maintains the stability of the insertion depth.

[0031] The clamping assembly 3 includes a pressure plate 31 and multiple sets of clamping rollers 32. An adjusting screw 33 is rotatably mounted on the upper end of the pressure plate 31 and is threadedly connected to the housing 1. Rotating the adjusting screw 33 drives the pressure plate 31 to rise and fall as a whole. The multiple sets of clamping rollers 32 are spaced apart at the lower end of the pressure plate 31 and correspond vertically to the push rollers 21. Each clamping roller 32 also has a pipe-clamping groove 212. The multiple sets of clamping rollers 32 and the multiple sets of push rollers 21 correspond vertically, providing a uniform and sufficient clamping force for the conduit, ensuring that the push rollers 21 can effectively drive the conduit through friction and prevent slippage.

[0032] The pressure plate 31 is provided with sliding wings 311 on both sides, and the cavity 11 is provided with sliding grooves 111 on both sides in the vertical direction. The sliding wings 311 can be slidably inserted into the sliding grooves 111. The sliding wings 311 on both sides of the pressure plate 31 are inserted into the vertical sliding grooves 111 on both sides of the cavity 11, ensuring that the pressure plate 31 can only move vertically.

[0033] A T-shaped rotating block 331 is provided at the lower end of the adjusting screw 33. A T-shaped rotating groove 312 adapted to the T-shaped rotating block 331 is provided in the pressure plate 31. The T-shaped rotating block 331 can be rotatably inserted into the T-shaped rotating groove 312. The lower end of the adjusting screw 33 cooperates with the T-shaped rotating groove 312 on the pressure plate 31 through the T-shaped rotating block 331, so that the screw does not drive the pressure plate 31 to rotate when rotating. Therefore, when inserting the conduit, the adjusting screw 33 can be rotated to lift the pressure plate 31, insert the conduit from the inlet 12, place it on the push wheel 21, and then press the pressure plate 31 down to the appropriate position so that the clamping wheel 32 presses the conduit tightly on the push wheel 21.

[0034] In use, the maximum propulsion force is selected according to different patients. Pull the locking sleeve 7 backward, rotate the adjusting sleeve 6 to the corresponding scale position on the fixed shaft 14, release the locking sleeve 7 to lock it, insert the catheter and clamp it through the clamping component 3. The medical staff holds the handle 15 and operates the drive component 4 (such as slowly shaking the handle). The power is transmitted through the magnetic coupler 5, worm 511 and turbine 211 in sequence, and finally drives the propulsion wheel 21 to rotate, pushing the catheter out smoothly. If the front end of the catheter encounters abnormal resistance, causing the required propulsion torque to exceed the set value of the magnetic coupler 5, the permanent magnet rotor 51 and the copper rotor 52 will slip, the drive component 4 will spin freely, and the catheter will stop moving forward, thus protecting the patient's safety. In addition, the reverse self-locking characteristic between the worm wheel and worm 511 structure can prevent the catheter from retracting.

[0035] It should be understood that all the above embodiments are exemplary and not restrictive. Various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of the present invention should be within the protection scope of the present invention.

Claims

1. A surgical cannula pusher, comprising a housing (1), a pusher assembly (2), a clamping assembly (3), and a drive assembly (4), wherein the housing (1) has a cavity (11), and the cavity (11) has an inlet (12) and an outlet (13) at both ends; the pusher assembly (2) and the clamping assembly (3) are disposed vertically and spaced apart within the cavity (11); and the drive assembly (4) is used to drive the pusher assembly (2) to move, characterized in that: It also includes a magnetic coupler (5), which includes a permanent magnet rotor (51) and a copper rotor (52). The permanent magnet rotor (51) has permanent magnets with different magnetic poles evenly spaced at one end near the copper rotor (52), and the permanent magnet rotor (51) and the copper rotor (52) are respectively connected to the propulsion assembly (2) and the drive assembly (4).

2. The surgical cannula pusher according to claim 1, characterized in that: The drive assembly (4) and the copper rotor (52) are connected to the housing (1) via an adjusting bushing (6). A fixed shaft (14) is provided on one side of the housing (1). The adjusting bushing (6) is fitted onto the fixed shaft (14) and is threadedly connected to the fixed shaft (14). The gap between the copper rotor (52) and the permanent magnet rotor (51) can be adjusted by rotating the adjusting bushing (6).

3. The surgical cannula pusher according to claim 2, characterized in that: The adjusting bushing (6) is also provided with a locking sleeve (7), which is slidably fitted onto the adjusting bushing (6). The inner sidewall of the locking sleeve (7) is provided with a relief groove (71). The sidewall of the adjusting bushing (6) is provided with through holes (61) spaced apart along the circumference. A limiting ball (62) is provided in the through hole (61). The outer sidewall of the fixed shaft (14) is provided with a limiting groove (141) that matches the limiting ball (62). The limiting ball (62) can be simultaneously inserted into the through hole (61) and the limiting groove (141) under the action of the inner sidewall of the locking sleeve (7), thereby restricting the rotation of the adjusting bushing (6).

4. The surgical cannula pusher according to claim 3, characterized in that: A spring (8) is also provided on the adjusting bushing (6), a stepped platform (63) is provided on the adjusting bushing (6), a convex ring (72) is provided on the inner side wall of the locking sleeve (7), and the spring (8) is sleeved on the adjusting bushing (6), with its two ends abutting against the convex ring (72) and the stepped platform (63) respectively.

5. The surgical cannula pusher according to claim 3 or 4, characterized in that: The fixed shaft (14) is provided with scale lines (142).

6. The surgical cannula pusher according to claim 1, characterized in that: The propulsion assembly (2) includes multiple sets of propulsion wheels (21), and the multiple sets of propulsion wheels (21) are synchronously connected by belts (22). One side of one set of propulsion wheels (21) is fixedly provided with a turbine (211), and the other end of the permanent magnet rotor (51) is provided with a worm (511). The propulsion wheel (21) is driven to rotate by the meshing of the turbine (211) and the worm (511).

7. The surgical cannula pusher according to claim 5, characterized in that: The clamping assembly (3) includes a pressure plate (31) and multiple sets of clamping wheels (32). An adjusting screw (33) is rotatably provided on the upper end of the pressure plate (31), and the adjusting screw (33) is threadedly connected to the housing (1). The multiple sets of clamping wheels (32) are spaced apart at the lower end of the pressure plate (31), and sliding wings (311) are provided on both sides of the pressure plate (31). Sliding grooves (111) are provided on both sides of the cavity (11) along the vertical direction, and the sliding wings (311) are slidably inserted into the sliding grooves (111).

8. The surgical cannula pusher according to claim 7, characterized in that: The lower end of the adjusting screw (33) is provided with a T-shaped rotating block (331), and the pressure plate (31) is provided with a T-shaped rotating groove (312) that is adapted to the T-shaped rotating block (331). The T-shaped rotating block (331) can be rotatably inserted into the T-shaped rotating groove (312).

9. The surgical cannula pusher according to claim 7, characterized in that: Both the push wheel (21) and the clamping wheel (32) are provided with a tube clamping groove (212) that matches the shape of the insertion tube.

10. The surgical cannula pusher according to claim 1, characterized in that: The lower end of the housing (1) is fixedly provided with a handle (15) for gripping, and the front side of the handle (15) is provided with a wave-shaped groove (151) that is adapted to the shape of human fingers.

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