CN116269647A

CN116269647A - Pump head catcher, thrombus absorbing system and using method of thrombus absorbing system

Info

Publication number: CN116269647A
Application number: CN202310547020.XA
Authority: CN
Inventors: 孙宏轩; 郭磊; 戴辰晨; 余盛达; 王靖源; 左廷涛
Original assignee: Lepu Medical Technology Beijing Co Ltd
Current assignee: Lepu Medical Technology Beijing Co Ltd
Priority date: 2023-05-16
Filing date: 2023-05-16
Publication date: 2023-06-23
Anticipated expiration: 2043-05-16
Also published as: CN116269647B

Abstract

The invention relates to the technical field of medical equipment, in particular to a pump head catcher, a thrombus absorbing system and a using method thereof. The pump head catcher includes: the connecting main body is provided with a plane cavity positioned at the axle center; the fixing seat is provided with a catching opening along the axial direction; the fixing seat comprises a plurality of sliding rails which are arranged along the radial direction and are communicated with the catching opening, mechanical claws are arranged in the sliding rails, the tail ends of the mechanical claws are connected with the driving springs, and the head ends of the mechanical claws are suitable for being clamped with arc ribs of the pump piston heads; the plurality of mechanical pawls move toward the axial center and/or maintain a tendency to move toward the axial center under the elastic force of the driving spring to collectively catch the pump piston head. The pump head catcher provided by the invention has more reliable compression resistance and fatigue resistance, and meanwhile, poor alignment of the pump piston head can be compensated in the X and Y directions, and poor inclination of the pump piston head relative to the Z direction at a small angle can be compensated, so that the requirement on alignment precision of a host machine is reduced, and the service life damage of a catheter pump is reduced.

Description

Pump head catcher, thrombus absorbing system and using method of thrombus absorbing system

Technical Field

The invention relates to the technical field of medical equipment, in particular to a pump head catcher, a thrombus absorbing system and a using method thereof.

Background

Thrombosis and embolism are the pathological basis of most cardiovascular and cerebrovascular diseases such as acute myocardial infarction, ischemic stroke, pulmonary embolism and the like, and are also the leading causes of death and limb disability. Transcatheter intervention is one of the main treatments for current clinical thrombotic diseases, including catheter thrombolysis and local drug thrombolysis. Wherein, the mechanical thrombolysis is combined with systemic and local injection of thrombolytic drugs, which can improve the early recanalization rate of the obstructed blood vessel and improve prognosis. Thus, transcatheter interventions are becoming increasingly accepted clinically, becoming a good choice for treatment of thrombotic disorders.

The pump head catcher of the existing thrombus removing system, as shown in publication number US9161765B2, discloses a reed pawl type pump head catcher, clamps the pump head through the elastic force of a three-claw sheet metal reed, and has low cost and easy processing. However, since the main motion of the suction pump is the linear rapid reciprocating piston motion, if the suction pump fails, such as a water inlet is blocked, or a water inlet and a water outlet are blocked, the pump cavity may be under negative pressure, and even be pumped into a vacuum state to a certain extent by the upward moving piston pump head. At this time, the force on the pump head gripper may exceed the strength limit of the reed, resulting in failure of the reed. Secondly, the pump head catcher and the pump head are assembled to easily cause the two to be different, local load is also caused to be too large for a single claw reed, the other two loads are very small, and the uneven load caused by poor centering can cause the reed to be more prone to failure. Moreover, such poor centering may also result in failure of the suction pump head to catch and may damage the pump head.

Thus, existing reed click pump head traps present a significant risk of fatigue failure, which can lead to surgical interruption if maintenance is not taken care of, and failure during surgery.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the prior reed click type pump head catcher has larger fatigue failure risk in the prior art, so as to provide the pump head catcher with reduced fatigue failure risk.

Another technical problem to be solved by the invention is to overcome the defect that the existing reed click type pump head catcher in the prior art has a large risk of fatigue failure, so as to provide a thrombus aspiration system for reducing the risk of fatigue failure.

In order to solve the above technical problems, the pump head catcher provided by the present invention includes:

a connecting body having a planar cavity at an axial center, the planar cavity adapted to receive a pump piston head;

the fixed seat is arranged at one end of the connecting main body, which is close to the pump piston head; the fixing seat is provided with a catching opening along the axial direction, and the catching opening is suitable for guiding the pump piston head to enter the plane cavity;

the fixing seat comprises a plurality of sliding rails which are arranged along the radial direction and are communicated with the capturing opening, mechanical claws are arranged in the sliding rails, the tail ends of the mechanical claws are connected with the driving springs, and the head ends of the mechanical claws are suitable for being clamped with arc ribs of the pump piston heads; the mechanical claws move towards the axle center and/or keep the trend of moving towards the axle center under the action of the elastic force of the driving springs so as to jointly catch the pump piston head.

Optionally, an axial floating gap is formed between the top wall of the planar cavity and the pump piston head, so that the pump piston head floats in the planar cavity along the Z direction.

Optionally, an axial floating gap between the top wall of the planar cavity and the pump piston head is H, and H is more than or equal to 0.1mm and less than or equal to 0.2mm.

Optionally, a radial floating gap is formed between the head end of the mechanical claw and the pump piston head, wherein the radial floating gap is W, and W is more than 0 and less than or equal to 0.8mm.

Optionally, the overlap length between the mechanical claw and the arc rib is T, and T is more than or equal to 1.5W and less than or equal to 2.5W.

Optionally, a clamping surface is arranged at one end, close to the connecting body, of the mechanical claw along the axial direction, and the clamping surface is suitable for being abutted with the bottom surface of the arc rib;

the head end of the mechanical claw is provided with a transition surface, an acute angle is formed between the transition surface and the clamping surface, and the transition surface is suitable for guiding the pump piston head to move along the axial direction and close to the connecting main body.

Optionally, the fixing base includes:

the bottom plate is provided with the sliding rail;

the cover plate is arranged with the bottom plate along the axial direction at intervals and is fixedly connected with the bottom plate so as to encapsulate the mechanical claw in the sliding rail;

The side cover is fixedly connected with the cover plate and/or the bottom plate, and the side cover is suitable for limiting the driving spring.

Optionally, the mechanical claw includes spacing portion, the apron and/or the bottom plate is close to one side of mechanical claw has seted up the spacing groove, spacing portion slide set up in the spacing groove is in order to right the mechanical claw is spacing.

The thrombus absorbing system provided by the invention comprises:

a main frame;

the main frame is provided with a catheter pump moving unit along the Z direction, the catheter pump moving unit is connected with a pump piston head through the pump head catcher, and the pump piston head is arranged at one end of the suction pump; the other end of the suction pump is connected with the peristaltic pump through a thrombus suction catheter;

and a catheter table moving unit is arranged on the main frame along the Y direction and is suitable for driving the suction pump and the peristaltic pump to move along the Y direction relative to the main frame.

The invention also provides a using method of the thrombus absorbing system, which comprises the following steps:

s1, controlling a catheter table movement unit to drive a suction pump and a peristaltic pump to move away from the catheter pump movement unit along a Y direction, so that the peristaltic pump is switched to an open state;

s2, installing and fixing a suction pump on a catheter table moving unit, placing a thrombolysis catheter in a clamping gap, controlling the catheter table moving unit to drive the suction pump and the peristaltic pump to approach the catheter pump moving unit along the Y direction, and switching the peristaltic pump to a closed state;

S3, controlling the catheter pump movement unit to drive the pump head catcher to approach and catch the pump piston head along the Z direction;

s4, controlling the catheter pump movement unit to drive the suction pump to reciprocate linearly along the Z direction at a high speed; the roller pump mechanism is controlled to throttle the thrombolytic duct.

The technical scheme of the invention has the following advantages:

1. according to the pump head catcher provided by the invention, the connecting main body is provided with the plane cavity, so that a certain floating space exists in the Z direction of the pump piston head; the fixing seat is provided with the mechanical claw through arranging the sliding rail, the tail end of the mechanical claw is connected with the driving spring, so that a spring sliding rail capturing mechanism is formed, compared with a three-claw sheet metal reed manufactured by a sheet metal process before improvement, the compression resistance and the fatigue resistance of the spring sliding rail capturing mechanism are more reliable, meanwhile, the spring sliding rail capturing mechanism is matched with the plane cavity, the poor alignment of the pump piston head can be compensated in the X and Y directions, the poor inclination of the pump piston head relative to the Z direction can be compensated, the alignment precision requirement on a host is reduced, and the service life damage of the catheter pump is reduced.

2. According to the pump head catcher provided by the invention, the axial floating gap H is preset between the top wall of the planar cavity and the pump piston head, so that the pump piston head floats in the planar cavity along the Z direction, the pump head catcher can smoothly catch the pump piston head, and the catching action is ensured to be more reliable; the axial floating gap between the top wall of the planar cavity and the pump piston head is H, and H is more than or equal to 0.1mm and less than or equal to 0.2mm, so that the mechanical claw can be smoothly ejected out to finish capturing the pump piston head, and the pump piston head can be limited to excessively move axially in the planar cavity, and the stability of the pump head catcher is enhanced.

3. According to the pump head catcher provided by the invention, a radial floating gap is formed between the head end of the mechanical claw and the pump piston head, wherein W is more than 0 and less than or equal to 0.8mm, so that poor deviation of the pump piston head in the X direction and/or the Y direction is compensated by matching with the planar cavity, and the perpendicularity between a pump body to which the pump piston head belongs and a pump seat is ensured; the overlap joint length between the mechanical claw and the arc rib is T, T is less than or equal to 1.5W and less than or equal to 2.5W, offset faults of the pump piston head in the X direction and/or the Y direction are compensated, risks of detachment of the pump piston head due to offset and the mechanical claw can be avoided, capturing stability is improved, the structures of the pump piston head and the pump head catcher can be optimized, and the coordination of the overall structure and performance is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a partial cross-sectional structure of a pump head catcher catch completed pump head of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view at B in FIG. 1;

FIG. 4 is a schematic diagram of the operation of the pump head catcher catch pump head of the present invention;

FIG. 5 is a schematic illustration of a gripper and a holder of a pump head catcher according to the present invention;

FIG. 6 is a schematic illustration of another spacing relationship between the gripper and the mounting base of the pump head catcher of the present invention;

FIG. 7 is a schematic diagram of the overall structure of the thrombus aspiration system of the present invention;

FIG. 8 is an enlarged view of FIG. 7 at C;

FIG. 9 is a schematic view showing the structure of a peristaltic pump of the thrombus aspiration system of the present invention in a closed state;

FIG. 10 is an enlarged partial cross-sectional view at D in FIG. 9;

FIG. 11 is a schematic view showing the structure of a peristaltic pump of the thrombus aspiration system of the present invention in an open state;

FIG. 12 is an enlarged partial cross-sectional view at E in FIG. 11;

FIG. 13 is a schematic view of an exploded construction of a peristaltic pump of the thrombus aspiration system of the present invention;

FIG. 14 is a schematic cross-sectional view of a roller pump mechanism of a peristaltic pump of the thrombus aspiration system of the present invention;

fig. 15 is an enlarged view of F in fig. 13.

Reference numerals illustrate:

110. a connecting body; 1101. a planar cavity;

120. A fixing seat; 1201. a catching port; 1202. a slide rail; 1203. a limit groove; 121. a bottom plate; 122. a cover plate; 123. a side cover;

130. a mechanical claw; 131. a clamping surface; 132. a transition surface; 133. a limit part;

140. a drive spring;

20. a mounting frame;

21. a roller pump mechanism; 211. a motor; 212. a fixed plate; 213. a throttle roller;

22. a clamping structure; 221. a sliding part; 2211. a first shaft hole; 2212. a second shaft hole; 222. a clamping part; 223. a thrombolysis catheter;

23. an elastic guide post mechanism; 231. a first shaft; 232. a second shaft; 233. a spring; 234. a sliding bearing;

24. a positioning structure;

30. a catheter table movement unit;

31. a suction pump; 311. a pump piston head; 3111. arc ribs;

40. a catheter pump movement unit;

50. a main frame;

51. an inclined plane structure; 511. a ramp drive rail; 5111. a ramp distal end; 5112. a ramp proximal end; 5113. a ramp transition section; 512. a roller mechanism; 513. and a fixed shaft.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1

Referring to fig. 1 to 6, a pump head catcher provided in this embodiment includes:

a connecting body 110 having a planar cavity 1101 in the axial center, said planar cavity 1101 being adapted to receive a pump piston head 311;

the fixing seat 120 is arranged at one end of the connecting main body 110, which is close to the pump piston head 311; the fixing base 120 is provided with a capturing opening 1201 along the axial direction, and the capturing opening 1201 is adapted to guide the pump piston head 311 into the planar cavity 1101;

the fixing seat 120 includes a plurality of sliding rails 1202 radially disposed and communicated with the capturing opening 1201, a mechanical claw 130 is disposed in the sliding rails 1202, a tail end of the mechanical claw 130 is connected with the driving spring 140, and a head end of the mechanical claw 130 is adapted to be clamped with an arc rib 3111 of the pump piston head 311; the plurality of grippers 130 move toward the hub and/or maintain a tendency to move toward the hub under the force of the drive spring 140 to collectively capture the pump piston head 311.

It should be noted that the material of the pump head catcher of the invention can be common metals such as steel, aluminum, and the like, and can also be common plastic materials such as ABS, nylon, and the like. In a specific implementation process, the motion of the pump head catcher may be a straight-line descending catch, a swing catch, a rotation descending catch, etc., and may be adjusted according to the actual use situation, which is not limited to the situation described in the present embodiment.

Optionally, the sliding rail 1202 and the gripper 130 are manufactured by machining.

Optionally, the fixing base 120 includes three radially disposed sliding rails 1202, each sliding rail 1202 is provided with a mechanical claw 130, and a tail end of each mechanical claw 130 is connected with the driving spring 140, so as to form a three-claw spring sliding rail capturing mechanism, and during operation, the three mechanical claws 130 respectively move towards the axle center and/or keep a trend of moving towards the axle center under the action of the elastic force of the corresponding driving spring 140 so as to jointly capture the pump piston head 311.

It should be noted that, the spring pawl type pump head catcher of the reed before improvement clamps the pump head through the elastic force of the three-jaw sheet metal reed, because the main motion of the suction pump is the linear rapid reciprocating piston motion, if the suction pump fails, such as the water inlet is blocked, or the water inlet and the water outlet are blocked, the pump cavity is possibly in negative pressure, and even the pump cavity is pumped into a vacuum state to a certain extent by the upward moving piston pump head. At this time, the force on the pump head gripper may exceed the strength limit of the reed, resulting in failure of the reed. The compression resistance and fatigue resistance of the slide rail 1202 and the mechanical claw 130 which are machined and manufactured by the pump head catcher provided by the invention are more reliable than those of the reed manufactured by a sheet metal process, and the actual measurement result of multiple operation shows that the pump head catcher provided by the invention can still work stably even if the pump head catcher is overloaded by 3 times of the system pressure; according to the pump head catcher, the sliding rail 1202 and the mechanical claw 130 which is radially and slidably connected with the sliding rail 1202 are arranged, and the driving spring 140 is arranged at the tail end of the mechanical claw 130, so that the sliding rail 1202 and the mechanical claw 130 can bear the axial piston force of the suction pump and transfer the axial piston force to the fixing seat 120 under the condition that the suction pump fails, such as a water inlet is blocked or a water inlet and a water outlet are blocked, the driving spring 140 is prevented from directly bearing the axial piston force, the failure risk of the driving spring 140 is effectively reduced, and the overload resistance is higher.

It should be noted that, the spring pawl type pump head catcher before improvement clamps the pump head through the elastic force of the three-claw sheet metal spring, the pump head catcher and the pump head are assembled to easily cause the two to be different, and partial load is too large for a single claw sheet, and the other two loads are very small, so that the spring is easier to fail due to uneven load caused by poor centering, the suction pump head is likely to fail to catch due to poor centering, and the pump head is likely to be damaged; moreover, the spherical cavity of the reed click type pump head catcher before improvement has too high requirements on the accuracy of the host, is easier to deviate, and can bring risks to the service life of the catheter pump. According to the pump head catcher provided by the invention, a certain gap is reserved between the inner wall of the plane cavity 1101 and the pump piston head 311 by arranging the plane cavity 1101, so that the pump piston head 311 is not completely blocked in the Z direction, and the pump piston head 311 can be more easily caught; by arranging the sliding rail 1202 and the mechanical claw 130, the tail end of the mechanical claw 130 is connected with the driving spring 140, so that a spring sliding rail capturing mechanism is formed; the plane cavity 1101 can compensate the problem caused by poor centering of the main machine to a certain extent, even if the pump piston head 311 and the pump head catcher have different axes or deflection to a certain extent, the spring slide rail catching mechanism has certain margins in the X, Y and Z directions, can compensate the problem caused by poor centering caused by coaxiality or deflection, can ensure that the three mechanical claws 130 stably clamp the pump piston head 311, and improves the catching reliability.

In this embodiment, the connecting body 110 is provided with a planar cavity 1101, so that the pump piston head 311 has a certain floating space along the Z direction; the fixing seat 120 is provided with the mechanical claw 130 through arranging the sliding rail 1202, the tail end of the mechanical claw 130 is connected with the driving spring 140, so that a spring sliding rail capturing mechanism is formed, compared with a three-claw sheet metal reed manufactured by a sheet metal process before improvement, the compression resistance and fatigue resistance of the spring sliding rail capturing mechanism are more reliable, meanwhile, the spring sliding rail capturing mechanism is matched with the plane cavity 1101, the poor alignment of a pump piston head can be compensated in the X and Y directions, the poor inclination of the pump piston head relative to the Z direction can be compensated, the alignment precision requirement on a host is reduced, and the service life breakage of a catheter pump is reduced.

Specifically, an axial float gap is formed between the top wall of the planar cavity 1101 and the pump piston head 311 to float the pump piston head 311 in the Z-direction within the planar cavity 1101.

Specifically, the axial floating clearance between the top wall of the planar cavity 1101 and the pump piston head 311 is H, which satisfies 0.1 mm.ltoreq.H.ltoreq.0.2 mm.

It should be noted that, referring to fig. 4, a hemispherical top is disposed at an end of the pump piston head 311 near the pump head catcher, an arc rib 3111 is disposed at the pump piston head 311 from the hemispherical top to a direction away from the pump head catcher, and a diameter of the arc rib 3111 is larger than a diameter of the hemispherical top. Referring to fig. 1 and 2, an axial floating gap H is preset between the top wall of the planar cavity 1101 and the pump piston head 311, so that the pump piston head 311 floats in the planar cavity 1101 along the Z direction, and the pump head catcher can successfully catch the pump piston head 311, thereby ensuring more reliable catching action. If the axial floating clearance is too small or not left, the gripper 130 may be blocked or caught by the peripheral side edge of the arc rib 3111 of the pump piston head 311 during ejection, and it is difficult to eject, resulting in failure of catching, so H needs to satisfy H0.1 mm or more; if the axial float clearance is too large, the gripper 130 can capture the pump piston head 311 after ejection, but it is easy to make the pump piston head 311 have too large axial movement in the planar cavity 1101, which affects the stability of the pump head catcher, so H needs to satisfy H0.2 mm or less. Referring to fig. 2, the axial floating gap between the top wall of the planar cavity 1101 and the pump piston head 311 is H, where H is equal to or greater than 0.1mm and equal to or less than 0.2mm, so that the mechanical claw 130 can be smoothly ejected to complete capturing of the pump piston head 311, and the excessive axial movement of the pump piston head 311 in the planar cavity 1101 can be limited, so as to enhance the stability of the pump head catcher.

Specifically, a radial floating gap is formed between the head end of the mechanical claw 130 and the pump piston head 311, wherein W is W, and W is more than 0 and less than or equal to 0.8mm.

It should be noted that, in order to avoid the assembling precision of the gripper 130 and the setting precision of the limiting position thereof from directly affecting the offset of the pump piston head 311, after the gripper 130 pops up and is at the limiting position, the gripper 130 needs to avoid directly radially abutting against the pump piston head 311, so, as shown in fig. 1 and 3, a radial floating gap W is preset between the head end of the gripper 130 and the pump piston head 311, and W is greater than 0, so that the pump piston head 311 can have a certain floating space in the radial direction; however, if the radial floating clearance is too large, the pump piston head 311 is likely to be separated from the gripper 130 due to misalignment, and therefore, the radial floating clearance should be W also be w.ltoreq.0.8 mm. Referring to fig. 3, a radial floating gap is formed between the head end of the mechanical claw 130 and the pump piston head 311, where W is more than 0 and less than or equal to 0.8mm, so that the planar cavity 1101 is matched to compensate for the poor offset of the pump piston head 311 in the X-direction and/or the Y-direction, and the perpendicularity between the pump body to which the pump piston head 311 belongs and the pump seat is ensured.

Specifically, the overlap length between the gripper 130 and the arc rib 3111 is T, which satisfies 1.5 W.ltoreq.T.ltoreq.2.5W.

It should be noted that, referring to fig. 3, if the overlap length between the gripper 130 and the arc rib 3111 is too short, the risk of the pump piston head 311 being disengaged from the gripper 130 due to misalignment may easily affect the capturing stability; if the overlap length between the gripper 130 and the arcuate rib 3111 is too long, the arcuate rib 3111 and the gripper 130 are correspondingly increased because the pump piston head 311 needs to meet the requirement of smoothly entering the pump head catcher along the Z-direction, which easily results in the overall structure of the pump piston head 311 and the pump head catcher being too large, resulting in imbalance in overall structure and performance. Still referring to fig. 3, on the basis that the radial floating gap is formed between the head end of the gripper 130 and the pump piston head 311, the overlap length between the gripper 130 and the arc rib 3111 is T, where T is 1.5 w.ltoreq.t.ltoreq.2.5W, and while compensating for the misalignment failure of the pump piston head 311 in the X-direction and/or the Y-direction, the risk of detachment of the pump piston head 311 from the gripper 130 due to the misalignment can be avoided, the capturing stability can be improved, the structures of the pump piston head 311 and the pump head catcher can be optimized, and the coordination of the overall structure and performance can be improved.

Specifically, a clamping surface 131 is disposed at one end of the mechanical claw 130, which is axially close to the connecting body 110, and the clamping surface 131 is adapted to abut against the bottom surface of the arc rib 3111;

the head end of the mechanical claw 130 is provided with a transition surface 132, the transition surface 132 and the clamping surface 131 are disposed at an acute angle, and the transition surface 132 is suitable for guiding the pump piston head 311 to move axially close to the connecting body 110.

It should be noted that, referring to fig. 1, the head end refers to an end of the gripper 130 that is radially close to the pump piston head 311, and the tail end refers to an end of the gripper 130 that is radially far from the pump piston head 311; referring to fig. 2, a clamping surface 131 is disposed at one end of the mechanical claw 130, which is axially close to the connecting body 110, a transition surface 132 is disposed at the head end of the mechanical claw 130, an acute angle is formed between the transition surface 132 and the clamping surface 131, and the transition surface 132 is adapted to guide the pump piston head 311 to move axially close to the connecting body 110; during the pump head catcher catching process, the transition surface 132 guides the pump head 311 to move axially close to the connecting body 110 until the clamping surface 131 abuts against the bottom surface of the arc rib 3111, and the hemispherical top of the pump head 311 is limited by the planar cavity 1101, so that the catching of the pump head 311 is completed.

Specifically, the fixing base 120 includes:

the bottom plate 121, the bottom plate 121 is provided with the sliding rail 1202;

the cover plate 122 is arranged at intervals along the axial direction with the bottom plate 121, and the cover plate 122 is fixedly connected with the bottom plate 121 so as to encapsulate the mechanical claw 130 in the sliding rail 1202;

the side cover 123, the side cover 123 is fixedly connected with the cover plate 122 and/or the bottom plate 121, and the side cover 123 is adapted to limit the driving spring 140.

Referring to fig. 1, in the present embodiment, the cover 122 is connected to the connecting body 110, the cover 122 and the bottom plate 121 are axially spaced apart, and the cover 122 and the bottom plate 121 are fixedly connected by bolts to encapsulate the mechanical claw 130 in the sliding rail 1202; the side cover 123 is fixedly connected with the cover plate 122 and/or the bottom plate 121 through bolts, and the side cover 123 abuts against the driving spring 140 to limit the driving spring 140.

Specifically, the mechanical claw 130 includes a limiting portion 133, a limiting groove 1203 is formed in a side of the cover plate 122 and/or the bottom plate 121, which is close to the mechanical claw 130, and the limiting portion 133 is slidably disposed in the limiting groove 1203 to limit the mechanical claw 130.

Note that, referring to fig. 5, the limiting portions 133 may be disposed on both sides of the gripper 130 along the width direction thereof; the bottom plate 121 is provided with a limiting groove 1203 corresponding to the limiting portion 133 along a vertical radial direction, and the limiting portion 133 is slidably disposed in the limiting groove 1203 along a radial direction, so as to limit the mechanical claw 130 to prevent the mechanical claw 130 from being separated from the sliding rail 1202. As a modification, referring to fig. 6, the gripper 130 includes a limiting portion 133, and the limiting portion 133 is disposed on at least one side of the gripper 130 in the Z direction; the cover plate 122 and/or the bottom plate 121 has a limiting groove 1203 formed on a side along the Z direction near the gripper 130, and the limiting portion 133 is slidably disposed in the limiting groove 1203 in the radial direction, so as to limit the gripper 130 to prevent the gripper 130 from being separated from the sliding rail 1202.

Example two

Referring to fig. 1 to 15, a thrombus-aspiration system according to the present embodiment includes:

a main frame 50;

a catheter pump moving unit 40 is arranged on the main frame 50 along the Z direction, the catheter pump moving unit 40 is connected with a pump piston head 311 through the pump head catcher, and the pump piston head 311 is arranged at one end of the suction pump 31; the other end of the suction pump 31 is connected with a peristaltic pump through a thrombus suction conduit 223;

The main frame 50 is provided with a catheter table moving unit 30 along the Y direction, which is adapted to drive the suction pump 31 and the peristaltic pump to move along the Y direction relative to the main frame 50.

It should be noted that, referring to fig. 8, the main frame 50 is provided with a catheter pump moving unit 40 along the Z direction, where the catheter pump moving unit 40 may be configured to be matched with an electric cylinder driven by a servo motor, and in a specific implementation process, a peripheral control unit may control parameters such as a movement stroke, an ascending speed, a descending speed, a residence time of the catheter pump moving unit 40 through a serial port, which are not described herein again; the catheter pump movement unit 40 is connected with the pump piston head 311 through the pump head catcher to drive the suction pump 31 to reciprocate in a straight line at high speed up and down along the Z direction, so as to realize the injection of high-speed fluid at the end of the thrombolysis catheter 223; the suction pump 31 is connected with a peristaltic pump through a thrombus suction conduit 223; the main frame 50 is provided with a catheter table moving unit 30 along the Y direction, where the catheter table moving unit 30 may be configured as a linear module driven by a stepper motor, a catheter table base is fixed above the linear module, and the linear module is driven by the stepper motor to drive the catheter table base to move linearly forward and backward along the Y direction, so as to realize the in-out of a catheter table (not shown in the figure) along the Y direction, and further drive the suction pump 31 and the peristaltic pump to move along the Y direction relative to the main frame 50, which is not described herein.

In this embodiment, the peristaltic pump includes:

a mounting frame 20 adapted for reciprocal movement in the Y-direction relative to the main frame 50;

the roller pump mechanism 21 is rotatably arranged on the mounting frame 20, and the roller pump mechanism 21 is in transmission connection with the motor 211;

a clamping structure 22 movably arranged on the mounting frame 20, wherein the clamping structure 22 is suitable for reciprocating movement along the X direction relative to the roller pump mechanism 21;

a slope structure 51 fixedly provided on the main frame 50 along one side in the X direction, and connected to the clamping structure 22 on the other side; the ramp structure 51 is adapted to drive the clamp structure 22 in the X-direction toward and away from the roller pump mechanism 21 to close or open the peristaltic pump during reciprocal movement of the mount 20 relative to the main frame 50 in the Y-direction.

In this embodiment, the peristaltic pump is mounted on the catheter table moving unit 30, and the catheter table moving unit 30 is located inside the host in a default state of the device; the catheter table moving unit 30 moves linearly along the Y direction, and the catheter table moving unit 30 can move the peristaltic pump, catheter table, etc. to a preset position outside the host machine from a default origin position inside the host machine, or can move the peristaltic pump, catheter table, etc. back to the default origin position inside the host machine from the preset position outside the host machine. When a user wants to install the suction pump 31, the host controls the catheter table moving unit 30 to move the carried peristaltic pump, catheter table and the like to a preset position outside the host along the Y direction, and in the process, the inclined surface structure 51 drives the clamping structure 22 to move away from the roller pump mechanism 21 along the X direction until the catheter table moves to the preset position; at this point the distance between the gripping structure 22 and the roller pump mechanism 21 is maximized, and the peristaltic pump 70 is now in an open state, at which time the suction pump 31 may be mounted in a pump seat (not shown) on the catheter table and a thrombolytic catheter 223 placed between the gripping structure 22 and the roller pump mechanism 21. Subsequently, the catheter table movement unit 30 is controlled by the host computer to return to the interior of the host computer, and in the process, the inclined surface structure 51 drives the clamping structure 22 to approach the roller pump mechanism 21 along the X direction until the catheter table movement unit 30 returns to the default origin position in the interior of the host computer; at this point, the distance between the holding structure 22 and the roller pump mechanism 21 is minimized, the peristaltic pump 70 is in a closed state, and the thrombolytic catheter 223 is firmly held by the holding structure 22 and the roller pump mechanism 21, so that the action of installing the suction pump 31 is completed.

It should be noted that, the peristaltic pump system before improvement not only needs the rotation of a motor control roller pump assembly to realize waste liquid reflux control, but also needs another independent motor and a transmission piece to control the opening and closing of the peristaltic pump to realize the automatic clamping function of the waste liquid pipe, and has complex transmission structure and higher damage risk and higher cost. According to the peristaltic pump provided by the invention, the roller pump mechanism 21 and the clamping structure 22 are driven to reciprocate along the Y direction relative to the main frame 50 by arranging the mounting frame 20; the clamping structure 22 is arranged to reciprocate along the X direction relative to the roller pump mechanism 21, so that the peristaltic pump is opened and closed; through setting up inclined plane structure 51, make inclined plane structure 51 along X to one side set up in on main frame 50, the opposite side with clamping structure 22 is connected the mounting bracket 20 is relative main frame 50 is along Y in-process that reciprocates, through the drive of inclined plane structure 51 clamping structure 22 is along X to be close to or keep away from roller pump mechanism 21 so that peristaltic pump is closed or is opened, need not to additionally join in marriage a special motor and supporting drive circuit and control peristaltic pump's opening and shutting, not only reduced the damage risk, practiced thrift great cost moreover.

Specifically, the mounting frame 20 is fixedly provided with an elastic guide pillar mechanism 23 along the X direction, the clamping structure 22 includes a sliding portion 221, and the sliding portion 221 is slidably disposed on the elastic guide pillar mechanism 23 along the X direction;

the inclined surface structure 51 includes a slope driving rail 511, and the slope driving rail 511 and the sliding portion 221 are always in a connected state in the X direction; the ramp drive rail 511 is adapted to drive the slide 221 in the X direction toward or away from the roller pump mechanism 21 as the mount 20 moves in the Y direction.

It should be noted that, referring to fig. 13 and 15, the elastic guide post mechanism 23 is fixedly disposed on the mounting frame 20 along the X direction; the clamping structure 22 comprises a sliding part 221, and the sliding part 221 is suitable for sliding reciprocally along the X direction relative to the elastic guide pillar mechanism 23 so as to realize the movement orientation of the peristaltic pump; the slope driving rail 511 and the sliding part 221 are always connected in the X direction; when the mounting frame 20 moves along the Y direction, the slope driving rail 511 is adapted to drive the sliding portion 221 to approach or separate from the roller pump mechanism 21 along the elastic guide pillar mechanism 23, so as to improve the stability of controlling the opening and closing of the peristaltic pump.

Specifically, the ramp drive rail 511 includes a ramp distal end 5111 and a ramp proximal end 5112 disposed along the Y-direction, the distance between the ramp distal end 5111 and the roller pump mechanism 21 along the X-direction being greater than the distance between the ramp proximal end 5112 and the roller pump mechanism 21 along the X-direction; when the sliding part 221 moves to the slope distal end 5111, the peristaltic pump is switched to an open state; when the slide 221 moves to the ramp proximal end 5112, the peristaltic pump switches to a closed state.

Optionally, the ramp driving rail 511 further includes a ramp transition section 5113, where the ramp transition section 5113 is disposed between the ramp distal end 5111 and the ramp proximal end 5112, and the ramp transition section 5113 is adapted to smoothly connect and transition the ramp distal end 5111 and the ramp proximal end 5112, so that the sliding portion 221 can be smoothly switched between the ramp distal end 5111 and the ramp proximal end 5112, and the stability of switching of the peristaltic pump between the open state and the closed state is enhanced.

It should be noted that, referring to fig. 10 and 12, in the present embodiment, the ramp driving rail 511 includes a ramp distal end 5111 and a ramp proximal end 5112 disposed along the Y direction, the ramp distal end 5111 and the ramp proximal end 5112 are smoothly connected and transited by a ramp transition section 5113, and a distance between the ramp distal end 5111 and the roller pump mechanism 21 along the X direction is greater than a distance between the ramp proximal end 5112 and the roller pump mechanism 21 along the X direction; during the reciprocal movement of the mounting frame 20 relative to the main frame 50 along the Y direction, when the sliding portion 221 moves to the slope distal end 5111 under the driving of the mounting frame 20, the distance between the clamping structure 22 and the roller pump mechanism 21 reaches the maximum, and the peristaltic pump is switched to the open state; when the sliding portion 221 moves to the slope proximal end 5112 under the driving of the mounting frame 20, the distance between the clamping structure 22 and the roller pump mechanism 21 is minimized, and the peristaltic pump is switched to a closed state, so that a special motor and a matched driving circuit are not required to be additionally arranged to control the opening and closing of the peristaltic pump, and the damage risk is reduced.

Specifically, a roller mechanism 512 is disposed between the sliding portion 221 and the ramp driving rail 511, and the roller mechanism 512 is adapted to rollably connect the ramp driving rail 511 with the sliding portion 221.

Referring to fig. 10 and 12, in this embodiment, a roller mechanism 512 is disposed between the sliding portion 221 and the slope driving rail 511, an inner ring (not shown in the drawing) of the roller mechanism 512 is rotatably disposed on a fixed shaft 513, the fixed shaft 513 is fixedly disposed on the sliding portion 221, and an outer ring of the roller mechanism 512 is rotatably disposed in a slot (not shown in the drawing) of the slope driving rail 511, so that the slope driving rail 511 is rotatably connected with the sliding portion 221, friction between the slope driving rail 511 and the sliding portion 221 is reduced, noise between the slope driving rail 511 and the sliding portion 221 is reduced, reliability of movement between the sliding portion 221 and the slope driving rail 511 is enhanced, and service life of the peristaltic pump is prolonged.

Specifically, the elastic guide pillar mechanism 23 includes a first shaft 231 disposed along the X direction, the sliding portion 221 is provided with a first shaft hole 2211 that is matched with the first shaft 231, a spring 233 is disposed between the first shaft hole 2211 and the first shaft 231, and the spring 233 is adapted to elastically connect the mounting frame 20 with the clamping structure 22;

The elastic guide post mechanism 23 further comprises a second shaft 232 disposed along the X direction, the sliding portion 221 is provided with a second shaft hole 2212 matched with the second shaft 232, a sliding bearing 234 is disposed between the second shaft hole 2212 and the second shaft 232, and the sliding bearing 234 is adapted to support the sliding portion 221 to slide along the second shaft 232.

Optionally, the number of the second shafts 232 is two, and the two second shafts 232 are symmetrically disposed on two sides of the first shaft 231 in the Y direction, which not only can provide stable support for the sliding portion 221, but also is beneficial to improving the directional movement precision of the sliding portion 221 relative to the mounting frame 20.

It should be noted that, referring to fig. 13 and 15, the first shaft 231 is fixedly disposed on the mounting frame 20 along the X direction, the sliding portion 221 is provided with a first shaft hole 2211, and the first shaft hole 2211 is adapted to be slidably matched with the first shaft 231 along the X direction; the spring 233 is coaxially disposed on the first shaft 231, and the spring 233 elastically connects the mounting frame 20 with the clamping structure 22, and meanwhile, the slope driving rail 511 is smoothly transited through the slope transition section 5113, so as to buffer the movement impact between the sliding part 221 and the mounting frame 20, and enhance the opening and closing stability of the peristaltic pump; the second shaft 232 is fixedly arranged on the mounting frame 20 along the X direction, the sliding part 221 is provided with a second shaft hole 2212, the second shaft hole 2212 is matched with the second shaft 232 through a sliding bearing 234, the sliding bearing 234 slides along the second shaft 232 by supporting the sliding part 221, so that the directional movement precision between the sliding part 221 and the mounting frame 20 can be improved, the running noise of the peristaltic pump can be reduced, and the stability and the accuracy of the opening and closing control of the whole peristaltic pump are improved.

Specifically, the elastic restoring force of the spring 233 is W, and when the sliding portion 221 moves to the slope proximal end 5112, W satisfies 10 n+.w+.12n; when the sliding portion 221 moves to the slope distal end 5111, W satisfies 0.5 N.ltoreq.W.ltoreq.1.5N.

Note that, referring to fig. 13 and 15, the elastic restoring force of the spring 233 is W, and the spring 233 is pre-compressed on the first shaft 231 during the process of the first shaft hole 2211 being matched with the first shaft 231. When the sliding portion 221 moves to the slope distal end 5111, the peristaltic pump is in an open state, and W cannot be too small, otherwise, it is difficult to effectively buffer the movement impact of the sliding portion 221 on the mounting frame 20 at the slope distal end 5111, so that W needs to satisfy that W is greater than or equal to 0.5N; at this time, W cannot be too large, or the pre-compression force required by the spring 233 is easily too large, so that the mechanical performance requirement of the whole structure is high, and therefore W needs to satisfy W less than or equal to 1.5N. When the sliding portion 221 moves to the slope proximal end 5112, the peristaltic pump is in a closed state, and W cannot be too small, otherwise, it is difficult to effectively ensure the positioning accuracy between the clamping structure 22 and the roller pump mechanism 21, so that W needs to satisfy W being greater than or equal to 10N; at this time, W cannot be too large, or else, the mounting frame 20 and/or the inclined plane structure 51 is easily pushed away excessively, so that the requirement on mechanical properties of the whole structure is high, and therefore W needs to be less than or equal to 12N.

In this embodiment, when the sliding portion 221 moves to the slope proximal end 5112, the precompression force W of the spring 233 satisfies 10 n+.w+.12n; when the sliding portion 221 moves to the slope distal end 5111, the precompression force W of the spring 233 satisfies 0.5N less than or equal to W less than or equal to 1.5N, so that the mechanical property of the whole structure is ensured, and meanwhile, the moving impact of the sliding portion 221 on the mounting frame 20 can be effectively buffered, and the positioning precision between the clamping structure 22 and the roller pump mechanism 21 can be effectively ensured.

Optionally, when the sliding portion 221 moves to the slope proximal end 5112, W may take a value of w=11n; when the sliding portion 221 moves to the slope distal end 5111, W may take a value of w=1n.

Specifically, the mounting frame 20 is provided with a positioning structure 24, and the positioning structure 24 is adapted to fix the roller pump mechanism 21 to the mounting frame 20;

the clamping structure 22 further comprises a clamping part 222, and the clamping part 222 is fixedly connected with the sliding part 221; the clamping part 222 is adapted to form a clamping gap between the positioning structure 24 and the sliding part 221 along the X direction, and the clamping gap is adapted to fix the bolt suction pipe 223, so that the roller pump mechanism 21 can intermittently clamp the bolt suction pipe 223.

Specifically, the roller pump mechanism 21 comprises a fixed disc 212, and a plurality of throttle rollers 213 are circumferentially arranged on the fixed disc 212;

the throttle roller 213 is rotatably provided on the fixed disk 212; the fixed disk 212 drives the throttle rollers 213 to rotate under the drive of the motor 211, so that any one throttle roller 213 clamps the throttle for the throttle suction conduit 223.

Note that, referring to fig. 13 and 14, in the present embodiment, the roller pump mechanism 21 includes: a fixed disk 212, the fixed disk 212 being rotated by the motor 211; three throttle rollers 213 are uniformly arranged on the periphery of the fixed disc 212, and the three throttle rollers 213 are rotatably arranged on the fixed disc 212; the fixed disk 212 drives the three throttle rollers 213 to rotate under the drive of the motor 211, so that any one throttle roller 213 clamps the throttle on the throttle suction catheter 223, thereby controlling the volume flow of the throttle suction catheter 223; in a specific implementation, the external control unit may pulse-control the motor 211 to control the rotational direction and rotational speed of the roller pump mechanism 21.

Example III

The application method of the thrombus absorbing system provided by the embodiment comprises the following steps:

s1, controlling the catheter table movement unit 30 to drive the suction pump 31 and the peristaltic pump to be far away from the catheter pump movement unit 40 along the Y direction, so that the peristaltic pump is switched to an open state;

s2, installing and fixing a suction pump 31 on a catheter table moving unit 30, placing a thrombus suction catheter 223 in a clamping gap, controlling the catheter table moving unit 30 to drive the suction pump 31 and the peristaltic pump to approach to the catheter pump moving unit 40 along the Y direction, and enabling the peristaltic pump to be switched to a closed state under the action of an inclined surface structure 51;

s3, controlling the catheter pump movement unit 40 to drive the pump head catcher to approach and catch the pump piston head 311 along the Z direction;

s4, controlling the catheter pump movement unit 40 to drive the suction pump 31 to reciprocate linearly along the Z direction at a high speed; the roller pump mechanism 21 is controlled to throttle the suction catheter 223.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. A pump head catcher, comprising:

-a connecting body (110) having a planar cavity (1101) at the axis, said planar cavity (1101) being adapted to house a pump piston head (311);

the fixing seat (120) is arranged at one end of the connecting main body (110) close to the pump piston head (311); the fixing seat (120) is provided with a catching opening (1201) along the axial direction, and the catching opening (1201) is suitable for guiding the pump piston head (311) to enter the plane cavity (1101);

the fixed seat (120) comprises a plurality of sliding rails (1202) which are arranged along the radial direction and are communicated with the capturing opening (1201), a mechanical claw (130) is arranged in the sliding rails (1202), the tail end of the mechanical claw (130) is connected with the driving spring (140), and the head end of the mechanical claw (130) is suitable for being clamped with an arc rib (3111) of the pump piston head (311); the plurality of mechanical claws (130) move towards the axle center and/or keep the trend of moving towards the axle center under the action of the elastic force of the driving spring (140) so as to jointly catch the pump piston head (311).

2. The pump head catcher of claim 1, characterized in that an axial floating gap is formed between a top wall of the planar cavity (1101) and the pump piston head (311) to float the pump piston head (311) in the Z-direction within the planar cavity (1101).

3. Pump head catcher according to claim 2, characterized in that the axial floating clearance between the top wall of the planar cavity (1101) and the pump piston head (311) is H, H satisfying 0.1mm +.h +.0.2 mm.

4. Pump head catcher according to claim 1, characterized in that a radial floating gap is formed between the head end of the gripper (130) and the pump piston head (311), the radial floating gap being W, W satisfying 0 < w.ltoreq.0.8 mm.

5. The pump head catcher of claim 4, wherein a lap length between the gripper (130) and the arcuate rib (3111) is T, T satisfying 1.5 w.ltoreq.t.ltoreq.2.5W.

6. Pump head catcher according to claim 1, characterized in that the end of the gripper (130) axially close to the connecting body (110) is provided with a clamping surface (131), the clamping surface (131) being adapted to abut against the bottom surface of the arc-shaped rib (3111);

the head end of the mechanical claw (130) is provided with a transition surface (132), an acute angle is formed between the transition surface (132) and the clamping surface (131), and the transition surface (132) is suitable for guiding the pump piston head (311) to move along the axial direction and close to the connecting main body (110).

7. The pump head catcher of any of claims 1-6, wherein the mount (120) comprises:

the bottom plate (121), the bottom plate (121) is provided with the sliding rail (1202);

the cover plate (122) is arranged with the bottom plate (121) along the axial direction at intervals, and the cover plate (122) is fixedly connected with the bottom plate (121) so as to encapsulate the mechanical claw (130) in the sliding rail (1202);

the side cover (123), side cover (123) with apron (122) and/or bottom plate (121) fixed connection, side cover (123) are suitable for spacing drive spring (140).

8. The pump head catcher according to claim 7, characterized in that the mechanical claw (130) comprises a limiting part (133), a limiting groove (1203) is formed in one side, close to the mechanical claw (130), of the cover plate (122) and/or the bottom plate (121), and the limiting part (133) is slidably arranged in the limiting groove (1203) to limit the mechanical claw (130).

9. A thrombus aspiration system, comprising:

a main frame (50);

a catheter pump movement unit (40) is arranged on the main frame (50) along the Z direction, the catheter pump movement unit (40) is connected with a pump piston head (311) through the pump head catcher as claimed in any one of the claims 1-8, and the pump piston head (311) is arranged at one end of the suction pump (31); the other end of the suction pump (31) is connected with a peristaltic pump through a thrombus suction conduit (223);

The main frame (50) is provided with a catheter table moving unit (30) along the Y direction, and the catheter table moving unit is suitable for driving the suction pump (31) and the peristaltic pump to move along the Y direction relative to the main frame (50).

10. A method of using a thrombus aspiration system, comprising the steps of:

s1, controlling a catheter table movement unit (30) to drive a suction pump (31) and a peristaltic pump to move away from the catheter pump movement unit (40) along a Y direction, so that the peristaltic pump is switched to an open state;

s2, installing and fixing a suction pump (31) on a catheter table moving unit (30), placing a thrombus suction catheter (223) in a clamping gap, controlling the catheter table moving unit (30) to drive the suction pump (31) and the peristaltic pump to approach the catheter pump moving unit (40) along the Y direction, and switching the peristaltic pump to a closed state;

s3, controlling a catheter pump movement unit (40) to drive a pump head catcher to approach and catch a pump piston head (311) along the Z direction;

s4, controlling the catheter pump movement unit (40) to drive the suction pump (31) to reciprocate linearly along the Z direction at a high speed; the roller pump mechanism (21) is controlled to throttle the thrombolytic duct (223).