CN115944845B - Pump body structure of catheter pump - Google Patents
Pump body structure of catheter pump Download PDFInfo
- Publication number
- CN115944845B CN115944845B CN202211708733.1A CN202211708733A CN115944845B CN 115944845 B CN115944845 B CN 115944845B CN 202211708733 A CN202211708733 A CN 202211708733A CN 115944845 B CN115944845 B CN 115944845B
- Authority
- CN
- China
- Prior art keywords
- impeller
- pump
- blade
- blood
- catheter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000008280 blood Substances 0.000 claims abstract description 66
- 210000004369 blood Anatomy 0.000 claims abstract description 66
- 230000017531 blood circulation Effects 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims 2
- 238000005452 bending Methods 0.000 claims 1
- 238000005086 pumping Methods 0.000 abstract description 19
- 230000009471 action Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 9
- 210000002489 tectorial membrane Anatomy 0.000 description 8
- 210000004204 blood vessel Anatomy 0.000 description 6
- 206010019280 Heart failures Diseases 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000002054 transplantation Methods 0.000 description 3
- 230000002861 ventricular Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 210000005242 cardiac chamber Anatomy 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 210000000709 aorta Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- External Artificial Organs (AREA)
Abstract
The application provides a pump body structure of catheter pump relates to the medical instrument field, including pipe and the flexible axle of wearing to establish in the pipe, the one end fixedly connected with pump case of pipe, the blood outlet that is used for blood outflow is seted up to the pump case proximal end, and the inside of pump case is equipped with the impeller subassembly that is used for adjusting blood flow, and impeller subassembly's blade includes the blade top, with wheel hub fixed connection's blade root and lie in the tortuous section between blade root and the blade top, and the spout has been seted up at the middle part of blade top, and the blade top has extension assembly through spout sliding connection. The impeller assembly reaches the working state of the maximum working rotating speed, the auxiliary impeller assembly which is connected in the sliding mode in the blades can slide outwards along the sliding grooves in the blades under the action of centrifugal force of the impeller assembly, the impeller is arranged in a telescopic sliding mode, the size is small during conveying, the conveying is easy, meanwhile, the using area of the blades can be increased under the working state, and the pumping efficiency of the impeller assembly to blood is improved.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a pump body structure of a catheter pump.
Background
Heart disease, represented by heart failure, is a major health problem leading to high mortality, and although heart transplantation is the best solution for treating end-stage heart failure, the development and application of heart transplantation is hampered by limited organ donors, and ventricular assist, especially left ventricular assist devices, exhibit its replacement value in heart failure patients unsuitable for heart transplantation, and thus, in the face of such patients, it is urgent to clinically support treatment of heart failure using mechanical ventricular assist devices and to rapidly and minimally invasively deploy treatment solutions;
in order to ensure stable contraction and expansion, the existing catheter pump can be inserted into a blood vessel of a patient and can be expanded after the insertion, in the compression and expansion process, a rotor (such as an impeller) and a shell are generally deformed correspondingly, the stability of the size of a blade tip clearance (also called a pump clearance, namely a clearance between the radial outer end of the impeller and the inner wall of a pump body shell) is an important influencing factor of the working stability of the catheter pump, the dimensional change of an external support (shell) of the pump body is small, the influence on the top clearance is the largest, namely the change of the outer diameter of the impeller, however, the outer diameter of the impeller is continuously increased along with the increase of the rotating speed, the outer diameter of the impeller is continuously increased, the hydrodynamic performance is reversely pushed to increase the diameter of the impeller, the stable and efficient working range of the impeller is small, the efficiency of the pump is influenced negatively, and meanwhile, the outer diameter of the impeller is continuously increased along with the increase of the rotating speed, so that the designed working point is easily exceeded, the impeller and the support is scraped, the working of the catheter pump is enabled to work failure, and the catheter pump is influenced to a certain effect on the patient, and the structure of the pump is improved.
Disclosure of Invention
The invention aims to provide a pump body structure of a catheter pump, which solves the problems that the outer diameter of an impeller is continuously increased along with the increase of the rotating speed, so that the design working point is easily exceeded, the impeller and a bracket are scratched, the operation of the catheter pump is invalid, and a certain influence is caused to a patient.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a pump body structure of catheter pump, includes the pipe and wears to establish the flexible axle in the pipe, the one end fixedly connected with pump case of pipe, the blood outlet that is used for blood outflow is seted up to the pump case proximal end, the inside of pump case is equipped with the impeller subassembly that is used for adjusting blood flow, the impeller subassembly includes the impeller axle, the middle part fixedly connected with wheel hub on impeller axle surface, wheel hub's surface fixedly connected with drives the blade that the blood flowed in the ventricle through rotatory, the blade includes the blade top, with wheel hub fixed connection's blade root and lie in the tortuous section between blade root and the blade top, the spout has been seted up at the middle part of blade top, the blade top has extension subassembly through spout sliding connection.
Preferably, the number of the blades is a plurality, and the plurality of the blades are fixedly arranged on the surface of the hub in the form of an annular array.
Preferably, the extension subassembly includes the extension piece with the tortuous section looks adaptation of blade, the bottom of extension piece is through spout and blade sliding connection, the bottom fixedly connected with reset spring of extension piece, reset spring's bottom fixed connection is in the blade root department of impeller.
The sliding groove comprises a spring placing groove and a sliding auxiliary groove, a limit flange matched with the sliding auxiliary groove is arranged at one end of the extension piece, the inner diameter of the sliding auxiliary groove is larger than that of the spring placing groove, and the limit flange is in sliding connection with the sliding auxiliary groove and limits through steps at two ends of the sliding auxiliary groove.
Preferably, in the initial position, the return spring pulls the limit flange, the limit flange is attached to a step at one end of the sliding auxiliary groove, and at this time, the return spring is in a stretched state and there is an initial pulling force on the limit flange.
Preferably, when the catheter pump is at the maximum working rotation speed, the step at the other end of the sliding auxiliary groove and the limit flange of the extension piece form limit, and at the moment, the centrifugal force born by the extension piece is greater than the pulling force of the return spring on the limit flange.
Preferably, an auxiliary impeller assembly is arranged in the pump shell near the blood outlet and penetrates through the flexible shaft and is connected with the flexible shaft, one end, far away from the impeller assembly, of the auxiliary impeller assembly is connected with the guide pipe, the auxiliary impeller assembly is connected with the impeller assembly through the flexible shaft, the impeller assembly comprises a proximal bearing chamber connected with the guide pipe, one end of the proximal bearing chamber is rotationally connected with the flexible shaft, the other end of the proximal bearing chamber is in transmission connection with an impeller shaft, and one end, far away from the proximal bearing chamber, of the impeller shaft is in transmission connection with a distal bearing chamber.
Preferably, the auxiliary impeller assembly comprises a sleeve fixedly connected with the flexible shaft, one end of the sleeve is fixedly connected with the catheter, one end of the sleeve, far away from the catheter, is rotationally connected with a transmission rod through a bearing, a plurality of paddles arranged in an annular array form are fixedly connected with the surface of the transmission rod, a connecting pipe is fixedly connected between the transmission rod and a near-end bearing chamber, each paddle comprises a flow receiving section close to the connecting pipe, a flow guiding section close to the sleeve and a transition section positioned between the flow receiving section and the flow guiding section, a certain distance is reserved between each paddle and the pump body, the connecting pipe is rotationally connected with the transmission rod through a bearing, the sleeve and the connecting pipe are all connected with the flexible shaft in a penetrating manner, and the transmission rod is fixedly sleeved with the flexible shaft.
Preferably, the pump housing includes a cover for defining a blood flow path and a bracket for supporting the spread cover, both ends of the bracket are connected to the proximal bearing chamber and the distal bearing chamber, respectively, and the bracket includes a tapered section connected to the proximal bearing chamber and the distal bearing chamber and a pressure-bearing section at a middle portion.
Preferably, the surface of distal end bearing room has seted up a plurality of draw-in groove with support looks adaptation, the toper section of support passes through draw-in groove and distal end bearing room looks joint, the one end that the tectorial membrane is close to the tail pipe is the tectorial membrane distal end, the other end of tectorial membrane is the tectorial membrane proximal end, the support is located the tectorial membrane distal end department of tectorial membrane, extend the subassembly and be located the tectorial membrane proximal end department of tectorial membrane.
Compared with the prior art, the invention has the beneficial effects that:
in the scheme of the application:
1. through the telescopic sliding arrangement of the impeller, the size is small during conveying, the service area of the impeller can be increased under the working condition, and further, the working failure of the catheter pump is effectively avoided when the pumping efficiency of the impeller assembly to blood is improved, when the blood in a ventricle is required to be pumped, a worker only needs to start the power device, the power device drives the impeller assembly to rotate through the flexible shaft, so that the blood in the ventricle is pumped to the aortic position through the blood outlet, the working condition of the impeller assembly reaches the maximum working rotating speed is achieved, the extension assembly which is in sliding connection with the impeller can slide outwards along the sliding groove in the impeller under the action of the centrifugal force, and therefore, the scraping of the impeller and the support is effectively avoided when the service area of the impeller assembly is increased, the working failure of the catheter pump is effectively avoided when the pumping efficiency of the impeller assembly to the blood is improved, and the practicability and the usability of the device are effectively improved;
2. through the setting of devices such as pipe, flexible axle, power device, auxiliary impeller subassembly and pump case, blood outlet and pig tail pipe for at the flexible axle drive impeller subassembly with the in-process of indoor blood through the pumping of blood outlet to main vessel department, its blood can be to reducing the impact force of blood to axial when flowing through auxiliary impeller subassembly, but increased the velocity of flow simultaneously, carry out certain guide to the flow direction of blood, thereby release the blood and produce the pressure of circling round when pumping through impeller subassembly, and then increased the velocity of flow of pumping, improve pumping efficiency and effectually play the effect of protection to the blood vessel simultaneously.
Drawings
Fig. 1 is a schematic overall structure of a pump body structure of a catheter pump provided in the present application;
FIG. 2 is a schematic cross-sectional view of a pump housing of a pump body structure of a catheter pump provided by the present application;
FIG. 3 is a schematic view of a pump body structure of a catheter pump and a pump body structure of a bracket and impeller assembly;
FIG. 4 is a schematic view of an impeller assembly of a pump body structure of a catheter pump provided herein;
FIG. 5 is a schematic view of a vane and hub of a pump body structure of a catheter pump provided by the present application;
FIG. 6 is a schematic cross-sectional view of an impeller assembly of a pump body structure of a catheter pump provided herein;
FIG. 7 is a schematic view of an auxiliary impeller assembly of a pump body structure of a catheter pump provided herein;
FIG. 8 is a schematic view of the pump body of the catheter pump and the pump housing in cross section;
FIG. 9 is a schematic left side view of an auxiliary impeller assembly of a pump body structure of a catheter pump provided by the present application;
FIG. 10 is a schematic left side view of a pump housing cross section of a pump body structure of a catheter pump provided herein;
FIG. 11 is an enlarged schematic view of the pump body structure of the catheter pump shown in FIG. 6;
FIG. 12 is a schematic elevation view of a pump housing cross-section of a pump body structure of a catheter pump provided herein;
fig. 13 is an enlarged schematic view of the pump body structure of the catheter pump shown in fig. 12 at B.
The figures indicate:
1. a conduit; 2. a flexible shaft; 3. a pump housing; 301. coating a film; 3011. a distal end of the coating; 3012. a coated proximal end; 302. a bracket; 3021. a conical section; 3022. a pressure-bearing section; 303. a clamping groove; 4. an impeller assembly; 401. a proximal bearing chamber; 402. an impeller shaft; 403. a hub; 404. a blade; 4041. leaf tops; 4042. blade root; 4043. a meandering section; 405. a spring mounting groove; 406. a distal bearing chamber; 407. a sliding auxiliary groove; 5. tail pipe; 6. an auxiliary impeller assembly; 601. a sleeve; 602. a transmission rod; 603. a paddle; 6031. a head-on section; 6032. a diversion section; 6033. a transition section; 604. a connecting pipe; 7. an extension assembly; 701. extension pieces; 702. a return spring; 703. a limit flange; 8. a retaining sleeve; 9. a coupler; 10. a power device; 11. and a blood outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments are some, but not all, embodiments of the invention.
Thus, the following detailed description of the embodiments of the invention is not intended to limit the scope of the invention, as claimed, but is merely representative of some embodiments of the invention. 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.
It should be noted that, under the condition of no conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, the terms "upper", "lower", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or an azimuth or a positional relationship conventionally put in use of the inventive product, or an azimuth or a positional relationship conventionally understood by those skilled in the art, such terms are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Referring to fig. 1 to 13, the present invention provides a technical solution: a pump body structure of a catheter pump,
example 1:
as shown in fig. 1 to 13, this embodiment proposes a pump body structure of a catheter pump, including a catheter 1 and a flexible shaft 2 penetrating through the catheter 1, one end of the catheter 1 is fixedly connected with a pump casing 3, one end of the flexible shaft 2 extends into the pump casing 3 and is connected with an impeller assembly 4, a blood outlet 11 for flowing out of blood is formed at the proximal end of the pump casing 3, an impeller assembly 4 for regulating the flow of blood is arranged in the pump casing 3, a pigtail pipe 5 is arranged at one end of the impeller assembly 4 far away from the catheter 1, an auxiliary impeller assembly 6 is arranged at a position close to the blood outlet 11 in the pump casing 3, the auxiliary impeller assembly 6 penetrates through the flexible shaft 2 and is connected with the same, one end of the auxiliary impeller assembly 6 far away from the impeller assembly 4 is connected with the catheter 1, the auxiliary impeller assembly 6 is connected with the impeller assembly 4 through the flexible shaft 2, when the device is used, a worker only needs to convey the pump casing 3 to a desired position in a heart of a patient through the catheter 1, for example, a left heart chamber is started, the power device 10 drives the impeller assembly 4 in the pump casing 3 to rotate through the flexible shaft 2, thereby the impeller assembly 4 in the pump casing 3 is driven by the flexible shaft 2, the impeller assembly 6 is driven by the impeller assembly 3 to rotate, the impeller assembly 6 in the pump is driven by the flexible shaft 3, the blood is driven by the impeller assembly 11, the pump speed is driven by the impeller assembly 11, and the blood pump speed is driven by the impeller assembly 11, and the pump speed is driven by the pump impeller assembly and the pump speed 11, and the blood pump speed is driven by the blood pump speed has high speed and has high efficiency.
The above-described schemes are further described in conjunction with specific modes of operation, as described in detail below:
as shown in fig. 1 to 13, as a preferred embodiment, further, the impeller assembly 4 comprises a proximal bearing chamber 401 connected with the catheter 1, one end of the proximal bearing chamber 401 is rotatably connected with the flexible shaft 2, the other end of the proximal bearing chamber 401 is in transmission connection with an impeller shaft 402, the middle part of the surface of the impeller shaft 402 is fixedly connected with a hub 403, the surface of the hub 403 is fixedly connected with a blade 404 which drives blood in a ventricle to flow through rotation, and the blade 404 can rotate in the pump shell 3 of the catheter pump;
the blade 404 includes blade top 4041, blade root 4042 fixedly connected with hub 403 and zigzag 4043 located between blade root 4042 and blade top 4041, the spout has been seted up at the middle part of blade top 4041, blade top 4041 has extension subassembly 7 through spout sliding connection, the quantity of blade 404 is three, three blade 404 is the fixed surface of arranging at hub 403 in 120 contained angle annular array's form, the one end transmission that the impeller shaft 402 kept away from proximal end bearing chamber 401 is connected with distal end bearing chamber 406, flexible axle 2 drives hub 403 through proximal end bearing chamber 401 to drive blade 404 and rotate, and drive blood to blood outlet 11 department, operating condition when blade 404 reaches maximum operating speed, can make the extension subassembly 7 of sliding connection in blade 404 outwards slide along the spout in the blade 404 under its centrifugal force, and when extension subassembly 7 reaches maximum extension scope, the most external diameter of its extension subassembly 7 will be less than the inner wall of impeller housing 3, make this catheter pump can keep the pump clearance steadily in the course of working, thereby effectively increased the usable area of blade 404, and effectively improved the efficiency of impeller housing 4 to the impeller housing 4. Through the flexible slip setting of impeller to size is little easy to carry when making to carry, can increase the usable floor area of blade simultaneously under operating condition, and then the effectual work that has avoided the conduit pump when having improved impeller subassembly to blood loses efficacy, make when needs pump to the blood in the ventricle, the staff only need start power device, make power device drive impeller subassembly through the flexible axle and rotate, thereby with the indoor blood pump to aortic department through the blood export, operating condition when impeller subassembly reaches maximum operating speed, can make the outward slip of spout in the blade of extension subassembly that sliding connects under its centrifugal force, thereby effectually avoided impeller and support to produce the scraping when increasing the usable floor area of blade, and then effectually avoided conduit pump's work to lose efficacy when having improved impeller subassembly to the pumping efficiency of blood, and the practicality and the usability of the device have been effectually improved.
As shown in fig. 1 to 13, as a preferred embodiment, further, on the basis of the above manner, the extension assembly 7 includes an extension piece 701 matched with the zigzag section 4043 of the blade 404, the bottom of the extension piece 701 is slidably connected with the blade 404 through a chute, the bottom of the extension piece 701 is fixedly connected with a return spring 702, the bottom end of the return spring 702 is fixedly connected at the blade root 4042 of the impeller, the elastic force of the return spring 702 is smaller than the centrifugal force when the impeller reaches a designated working rotation speed, when the impeller assembly 4 rotates under the driving of the flexible shaft 2, the centrifugal force generated by the blade 404 is gradually increased, when the impeller reaches a constant working rotation speed, the centrifugal force of the extension piece 7 is larger than the elastic force generated by the return spring 702, at this time, the extension piece 701 slides out from the chute in the blade 404 under the effect of the centrifugal force, so as to increase the spreading area of the blade 404, and further effectively improve the pumping efficiency of the impeller assembly 4 to blood, and meanwhile, when the maximum distance of the extension piece 701 slides out is still smaller than the diameter length of the pump housing 3 in the extended state; specifically, in this embodiment, the sliding chute includes a spring mounting groove 405 and a sliding auxiliary groove 407, and one end of the extension piece 701 is provided with a limit flange 703 that matches the sliding auxiliary groove 407. Specifically, the inner diameter of the sliding auxiliary groove 407 is larger than the inner diameter of the spring mounting groove 405, and the limiting flange 703 is slidably connected with the sliding auxiliary groove 407 and is limited by steps at both ends of the sliding auxiliary groove 407. In the initial position, the restoring spring 702 pulls the limit lip 703 against the step at one end of the slide auxiliary slot 407, in which case the restoring spring 702 has a pretensioned length and thus an initial pulling force on the limit lip 703.
The spring force formula of the spring is f1=kx X, where X is the length of elongation of the spring, k is the stiffness coefficient, and in the initial stage, since the return spring 702 has a pre-stretched elongation of X0; the centrifugal force is expressed as f2=a×m, where F2 is centrifugal force, a is centripetal acceleration, m is mass of the object, T is period of circular motion, ω is angular velocity of circular motion of the object, r is radius of motion of the object, i.e., a=r×ω 2 ＝v 2 /r＝(4×π 2 ×r)/T 2 When the flexible shaft 2 just starts to drive the impeller assembly 4 to rotate, the centrifugal force of the extension assembly 7 is smaller than the tension of the return spring 702, namely: f1 > F2.
At this time, the extension assembly 7 is located in the sliding groove on the blade 404 under the action of the elastic potential energy of the return spring 702, the pumping area of the impeller assembly 4 is the area when the extension piece is contracted in the groove, the blood is pumped by rotation,
when the impeller reaches a certain rotation speed before the constant working rotation speed, the centrifugal force of the extension assembly 7 is the same as the elastic force of the return spring 702, namely:
F1＝F2
at this time, the rotation speed of the impeller assembly 4 can still be continuously increased, so that the centrifugal force of the extension assembly 7 is finally larger than the elastic force of the reset spring 702, the extension assembly 7 slowly slides out of the sliding groove formed on the blade 404, the working area of the blade 404 is increased, the pumping effect on blood is gradually improved, the bearing pressure of the device and the blood vessel on the back pressure of the blood is reduced, the service life of the device is effectively prolonged,
when the impeller reaches a constant working rotation speed, the centrifugal force of the extension assembly 7 is larger than the elastic force of the return spring 702, namely:
f1 < F2, at this time, the extension piece 701 slides out along the sliding groove of the vane 404 under the action of centrifugal force, and the step at the other end of the sliding auxiliary groove 407 forms a limit with the limit flange 703 of the extension piece 701, and rotates together with the vane 404 to pump blood, thereby increasing the pumping effect on blood and achieving stable pumping on blood.
As shown in fig. 1 to 13, as a preferred embodiment, further, the auxiliary impeller assembly 6 includes a sleeve 601 fixedly connected with the flexible shaft 2, one end of the sleeve 601 is fixedly connected with the catheter 1, one end of the sleeve 601 far away from the catheter 1 is rotatably connected with a transmission rod 602 through a bearing, a plurality of paddles 603 arranged in a ring array form are fixedly connected with the surface of the transmission rod 602, the curvature of the curved surface of the paddles 603 is smaller than the curvature of the curved surface of the paddles 404, the paddles 603 are arranged, so that the impact force of blood is buffered when the blood flows through the paddles 603, and the flowing direction of the blood is guided to a certain extent, thereby releasing the rotary pressure generated when the blood is pumped through the impeller assembly 4, further reducing the impact force when the blood enters the blood vessel through the blood outlet 11, thereby effectively protecting the blood vessel, and a connecting pipe 604 is fixedly connected between the transmission rod 602 and the proximal bearing chamber 401;
the paddle 603 comprises a flow-facing section 6031 close to the connecting pipe 604, a flow-guiding section 6032 close to the sleeve 601 and a transition section 6033 between the flow-facing section 6031 and the flow-guiding section 6032, a certain distance is reserved between the paddle 603 and the pump body, the connecting pipe 604 is rotationally connected with the transmission rod 602 through a bearing, the sleeve 601 and the connecting pipe 604 are all in penetrating connection with the flexible shaft 2, the transmission rod 602 is fixedly sleeved with the flexible shaft 2, when the flexible shaft 2 drives the impeller assembly 4 to pump blood, the impeller assembly 4 rotates to be an initial stage, at the moment, the rotation rate of the paddle 404 is lower, so that the effect on pumping of the blood is poor, but the paddle 603 and the paddle 404 rotate together, the pumping effect of the device on the blood in the initial stage is effectively improved, and in the constant stage of pumping of the impeller assembly 4 on the blood, when the blood flows through the paddle 603, in the process of pumping the blood in the heart chamber through the blood outlet by the flexible shaft driving the impeller assembly to the main blood vessel, the impact force on the axial direction is reduced, but the flow speed is increased, the flow speed is guided to the flow direction of the impeller assembly 4 to pump the blood in the flowing through the auxiliary impeller assembly, the impeller assembly is released, the pressure is generated, and the effect on the blood flow speed is effectively improved when the blood is pumped is protected.
As shown in fig. 1 to 13, further to the above, the pump housing 3 includes a cover 301 for defining a blood flow path and a bracket 302 for supporting the spread cover 301, both ends of the bracket 302 are connected to a proximal bearing chamber 401 and a distal bearing chamber 406, respectively, and the bracket 302 includes a tapered section 3021 connected to the proximal bearing chamber 401 and the distal bearing chamber 406 and a pressure-bearing section 3022 in the middle;
the surface of the distal bearing chamber 406 is provided with a plurality of clamping grooves 303 matched with the bracket 302, the conical section 3021 of the bracket 302 is clamped with the distal bearing chamber 406 through the clamping grooves 303, one end of the coating 301 close to the pigtail 5 is a coating distal end 3011, the other end of the coating 301 is a coating proximal end 3012, the bracket 302 is positioned at the coating distal end 3011 of the coating 301, and the extension assembly 7 is positioned at the coating proximal end 3012 of the coating 301;
the tail pipe 5 is a flexible pipe body structure, one end of the tail pipe 5 is a circular arc or winding flexible bulge, the other end of the tail pipe 5 is fixedly connected with the far-end bearing chamber 406, the tail pipe 5 is supported on the inner wall of the ventricle in a non-invasive or non-invasive manner, the blood inlet of the pump shell 3 is separated from the inner wall of the ventricle, the suction inlet of the pump shell 3 is prevented from being attached to the inner wall of the ventricle due to the reaction force of blood in the working process of the pump shell 3, and the effective area of pumping is ensured.
As shown in fig. 1 to 13, the present embodiment proposes a catheter pump device, which includes an external structure and a pump body structure, wherein the external structure includes a retaining sleeve 8 fixedly connected with a catheter 1, the retaining sleeve 8 can fix the catheter 1, the catheter 1 is fixedly connected with a coupler 9 through the retaining sleeve 8, one end of the coupler 9 away from the catheter 1 is fixedly connected with a power device 10, and one end of a flexible shaft 2 close to the coupler 9 is in transmission connection with an output end of the power device 10.
Example 3:
the schemes of examples 1 and 2 are further described below in conjunction with specific modes of operation, as described below:
specifically, the pump body structure of the catheter pump is characterized in that when the catheter pump is used: the staff drives the pump body structure to move, carry to the desired position in the patient's heart, for example, in the left heart, the flexible axle 2 is utilized to drive wheel hub 403 to rotate, thereby drive blade 404 and rotate and pump blood, make it flow through sleeve 601 surface fixedly connected's paddle 603, thereby weaken the gyratory pressure and the impact force of blood, and pump to the aorta through blood outlet 11, thereby accomplish the use of the device, when impeller assembly 4 is in invariable operating condition, the extension piece 701 in the spout of blade 404 surface will slide out the spout under the effect of centrifugal force, and stretch reset spring 702, thereby increase the usable floor area of blade 404, improve the pumping to blood, when the impeller rotational speed drops to a certain extent, the centrifugal force of extension piece 701 is less than reset spring 702's elastic force at this moment, extension piece 701 will reset, be in the spout of seting up on blade 404.
The above embodiments are only for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail in the present specification with reference to the above embodiments, the present invention is not limited to the above specific embodiments, and thus any modifications or equivalent substitutions are made to the present invention; all technical solutions and modifications thereof that do not depart from the spirit and scope of the invention are intended to be included in the scope of the appended claims.
Claims (7)
1. The utility model provides a pump body structure of catheter pump, its characterized in that includes catheter (1) and wears to establish flexible axle (2) in catheter (1), one end fixedly connected with pump case (3) of catheter (1), blood outlet (11) that are used for blood outflow are seted up to pump case (3) proximal end, the inside of pump case (3) is equipped with impeller subassembly (4) that are used for adjusting blood flow, impeller subassembly (4) include impeller shaft (402), the middle part fixedly connected with wheel hub (403) on impeller shaft (402) surface, the surface fixedly connected with of wheel hub (403) drives blade (404) that the blood flowed in the ventricle through the rotation, blade (404) include blade top (4041), blade root (4042) and the tortuous section (4043) that are located between blade root (4042) and blade top (4041) that blade top (4041) set up the spout, blade top (4041) is connected with extension subassembly (7) through spout sliding;
the extension assembly (7) comprises an extension piece (701) which is matched with a bending section (4043) of the blade (404), the bottom of the extension piece (701) is in sliding connection with the blade (404) through a chute, the bottom of the extension piece (701) is fixedly connected with a return spring (702), and the bottom of the return spring (702) is fixedly connected with a blade root (4042) of the impeller;
an auxiliary impeller assembly (6) is arranged in the pump shell (3) near the blood outlet (11), the auxiliary impeller assembly (6) penetrates through the flexible shaft (2) and is connected with the flexible shaft, one end, far away from the impeller assembly (4), of the auxiliary impeller assembly (6) is connected with the guide tube (1), the auxiliary impeller assembly (6) is connected with the impeller assembly (4) through the flexible shaft (2), the impeller assembly (4) comprises a proximal bearing chamber (401) connected with the guide tube (1), one end of the proximal bearing chamber (401) is rotationally connected with the flexible shaft (2), the other end of the proximal bearing chamber (401) is in transmission connection with an impeller shaft (402), and one end, far away from the proximal bearing chamber (401), of the impeller shaft (402) is in transmission connection with a distal bearing chamber (406);
the auxiliary impeller assembly (6) comprises a sleeve (601) fixedly connected with the flexible shaft (2), one end of the sleeve (601) is fixedly connected with the guide pipe (1), one end of the sleeve (601) away from the guide pipe (1) is rotationally connected with a transmission rod (602) through a bearing, a plurality of paddles (603) which are arranged in an annular array form are fixedly connected with the surface of the transmission rod (602), a connecting pipe (604) is fixedly connected between the transmission rod (602) and a proximal bearing chamber (401), the paddles (603) comprise a flow facing section (6031) close to the connecting pipe (604), a flow guiding section (6032) close to the sleeve (601) and a transition section (6033) between the flow facing section (6031) and the guide pipe (6032), a certain distance is reserved between the paddles (603) and the pump body, the connecting pipe (604) and the transmission rod (602) are rotationally connected through the bearing, and the sleeve (601) and the connecting pipe (604) are all connected with the flexible shaft (2) in a penetrating mode, and the transmission rod (602) is fixedly sleeved with the flexible shaft (2).
2. Pump body structure of a catheter pump according to claim 1, characterized in that the number of the blades (404) is plural, and that the plurality of the blades (404) are fixedly arranged on the surface of the hub (403) in the form of an annular array.
3. Pump body structure of a catheter pump according to claim 1, characterized in that the sliding groove comprises a spring mounting groove (405) and a sliding auxiliary groove (407), one end of the extension piece (701) is provided with a limit flange (703) matched with the sliding auxiliary groove (407), the inner diameter of the sliding auxiliary groove (407) is larger than that of the spring mounting groove (405), and the limit flange (703) is in sliding connection with the sliding auxiliary groove (407) and limits through steps at two ends of the sliding auxiliary groove (407).
4. A pump body structure of a catheter pump according to claim 3, wherein in an initial position, the return spring (703) pulls the limit flange (703), the limit flange (703) is attached to a step at one end of the sliding auxiliary groove (407), and at this time, the return spring (702) is in a stretched state and there is an initial pulling force on the limit flange (703).
5. Pump body structure of a catheter pump according to claim 4, characterized in that the step at the other end of the sliding auxiliary groove (407) forms a limit with the limit flange (703) of the extension piece (701) when the catheter pump is at maximum working speed, and that the centrifugal force to which the extension piece (701) is subjected is greater than the pulling force of the return spring (702) on the limit flange (703).
6. Pump body structure of a catheter pump according to claim 1, characterized in that the pump housing (3) comprises a membrane (301) for defining a blood flow channel and a holder (302) for supporting the expanded membrane (301), both ends of the holder (302) being connected to a proximal bearing chamber (401) and a distal bearing chamber (406), respectively, and the holder (302) comprises a conical section (3021) connected to the proximal bearing chamber (401) and the distal bearing chamber (406) and a pressure-bearing section (3022) in the middle.
7. The pump body structure of the catheter pump according to claim 6, wherein a plurality of clamping grooves (303) matched with the support (302) are formed in the surface of the distal bearing chamber (406), the conical section (3021) of the support (302) is clamped with the distal bearing chamber (406) through the clamping grooves (303), one end, close to the tail pipe (5), of the coating (301) is a coating distal end (3011), the other end of the coating (301) is a coating proximal end (3012), the support (302) is located at the coating distal end (3011) of the coating (301), and the extension assembly (7) is located at the coating proximal end (3012) of the coating (301).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211708733.1A CN115944845B (en) | 2022-12-29 | 2022-12-29 | Pump body structure of catheter pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211708733.1A CN115944845B (en) | 2022-12-29 | 2022-12-29 | Pump body structure of catheter pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115944845A CN115944845A (en) | 2023-04-11 |
| CN115944845B true CN115944845B (en) | 2024-03-08 |
Family
ID=87287248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211708733.1A Active CN115944845B (en) | 2022-12-29 | 2022-12-29 | Pump body structure of catheter pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115944845B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116236684B (en) * | 2023-04-26 | 2024-03-12 | 心擎医疗（苏州）股份有限公司 | Catheter pump |
| CN116870356A (en) * | 2023-06-28 | 2023-10-13 | 安徽通灵仿生科技有限公司 | Catheter pump assembly and control system thereof |
| CN117653897B (en) * | 2023-07-31 | 2024-05-17 | 南京汉科明德医疗科技有限公司 | Left ventricle auxiliary pump |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2033070U (en) * | 1988-06-08 | 1989-02-22 | 梁术华 | Flexible blade centrifugal impeller |
| KR102202708B1 (en) * | 2020-04-14 | 2021-01-14 | 안용준 | Rotary pump using variable impeller |
| CN112460030A (en) * | 2021-01-29 | 2021-03-09 | 北京敦益科技有限公司 | Adjustable self-suction type sewage pump and using method thereof |
| CN216241382U (en) * | 2021-06-30 | 2022-04-08 | 华能宁夏能源有限公司 | Axial-flow fan with adjustable moving blades |
| CN115040777A (en) * | 2018-01-10 | 2022-09-13 | 马真塔医药有限公司 | Ventricular assist device |
| CN115154893A (en) * | 2022-07-18 | 2022-10-11 | 利为惠德无锡医疗科技有限公司 | Adjustable rear guide vane structure and artificial heart |
| CN115364367A (en) * | 2022-08-24 | 2022-11-22 | 上海焕擎医疗科技有限公司 | Heart auxiliary device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3800357B1 (en) * | 2006-03-23 | 2024-05-08 | The Penn State Research Foundation | Heart assist device with expandable impeller pump |
-
2022
- 2022-12-29 CN CN202211708733.1A patent/CN115944845B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2033070U (en) * | 1988-06-08 | 1989-02-22 | 梁术华 | Flexible blade centrifugal impeller |
| CN115040777A (en) * | 2018-01-10 | 2022-09-13 | 马真塔医药有限公司 | Ventricular assist device |
| KR102202708B1 (en) * | 2020-04-14 | 2021-01-14 | 안용준 | Rotary pump using variable impeller |
| CN112460030A (en) * | 2021-01-29 | 2021-03-09 | 北京敦益科技有限公司 | Adjustable self-suction type sewage pump and using method thereof |
| CN216241382U (en) * | 2021-06-30 | 2022-04-08 | 华能宁夏能源有限公司 | Axial-flow fan with adjustable moving blades |
| CN115154893A (en) * | 2022-07-18 | 2022-10-11 | 利为惠德无锡医疗科技有限公司 | Adjustable rear guide vane structure and artificial heart |
| CN115364367A (en) * | 2022-08-24 | 2022-11-22 | 上海焕擎医疗科技有限公司 | Heart auxiliary device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115944845A (en) | 2023-04-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115944845B (en) | Pump body structure of catheter pump | |
| US11703064B2 (en) | Pump housing with an interior for accommodating a pump rotor | |
| AU2013258252B2 (en) | Intravascular blood pump | |
| AU2007362036B2 (en) | Medical device | |
| US8371997B2 (en) | Article comprising an impeller II | |
| US9028392B2 (en) | Medical device | |
| JP4476328B2 (en) | Intracardiac blood pump | |
| EP3808390B1 (en) | Catheter pump assembly including a stator | |
| JP2012527269A (en) | Catheter pump | |
| US20210220634A1 (en) | Intracardiac percutaneous pump for circulatory support and related systems and methods | |
| CN216061675U (en) | Device for assisting the heart in the occurrence of functional failure | |
| CN116236683A (en) | Impeller assembly, pump head and interventional catheter device | |
| CN114344702B (en) | Catheter pump and pump body | |
| CN111097077B (en) | External magnetic drive liquid suspension axial-flow type blood pump | |
| CN216366322U (en) | Ventricular assist device | |
| CN219355087U (en) | Ventricular assist blood pumping device | |
| CN218636473U (en) | Catheter pump | |
| CN114010937B (en) | Catheter pump and impeller and pump body thereof | |
| CN114733062A (en) | Ventricular assist device | |
| CN217311629U (en) | Catheter pump and pump body thereof | |
| CN115869530A (en) | Interventional catheter device | |
| CN219251393U (en) | Catheter pump and stent thereof | |
| CN219251392U (en) | Catheter pump support and catheter pump | |
| CN220175861U (en) | Impeller assembly, pump head and interventional catheter device | |
| CN216061676U (en) | Impeller and blood pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Room 801, 802, 803, 804, Building 7, No. 188 Fuchunjiang Road, High-tech Zone, Suzhou City, Jiangsu Province, 215163 Applicant after: Xinqing Medical (Suzhou) Co.,Ltd. Address before: Room 801, 802, 803, 804, Building 7, No. 188 Fuchunjiang Road, High-tech Zone, Suzhou City, Jiangsu Province, 215163 Applicant before: SUZHOU XINQING MEDICAL TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |