CN116271494A

CN116271494A - Catheter pump assembly, catheter pump and method for fixing sensing device

Info

Publication number: CN116271494A
Application number: CN202310226290.0A
Authority: CN
Inventors: 沈朋; 塔娜; 肖申; 叶文雄; 杨云骢; 刘曦; 杨夏燕; 虞奇峰
Original assignee: Shanghai Huanqing Medical Technology Co ltd
Current assignee: Shanghai Huanqing Medical Technology Co ltd
Priority date: 2023-03-09
Filing date: 2023-03-09
Publication date: 2023-06-23

Abstract

The invention discloses a catheter pump assembly, a catheter pump and a method for fixing a sensing device. The catheter pump assembly comprises a pump shell, a sensing device and a cover plate, wherein the pump shell is provided with an inflow port and an outflow port, and a first installation station is arranged at the position, close to the outflow port, of the outer side of the pump shell. The sensing device is provided with a probe, the cover plate is covered on the first installation station, and an installation space capable of accommodating the probe is formed together with the first installation station. The cover plate is provided with a first avoiding hole capable of avoiding the probe so that the probe is in contact with the fluid, and a glue injection hole capable of injecting glue into the installation space. According to the invention, the probe of the sensing device is directly fixed on the outer side wall of the pump shell through the cover plate, so that the probe can directly contact with fluid for detection, the parameter precision of detection and the physiological control effect of the catheter pump are improved, the probe is prevented from loosening due to the impact of the fluid, and the stable fixation of the sensing device and the pump shell is ensured.

Description

Catheter pump assembly, catheter pump and method for fixing sensing device

Technical Field

The invention relates to the technical field of medical equipment, in particular to a catheter pump assembly, a catheter pump and a fixing method of a sensing device.

Background

In recent years, mechanical circulatory assistance has become an important way of treating cardiovascular critical conditions such as end-stage heart failure and cardiogenic shock, and plays an important role in improving patient hemodynamics. By mechanical circulation assisted treatment, part of the pumping function of the heart of the patient is replaced by the mechanical circulation assisted device, the heart is effectively resting, and the functional recovery of the heart of the patient is facilitated. Mechanical circulatory assist devices include intra-aortic balloon counterpulsation, extracorporeal membranous pulmonary oxygenation, implantable left ventricular assist devices, and interventional catheter pumps.

Compared with other mechanical circulation auxiliary devices, the interventional catheter pump has the characteristics of small wound and easy implantation, and has good treatment effect on high-risk patients such as patients suffering from severe gravity-induced shock. However, the hemodynamic characteristics of the patient are the result of the combined action of the catheter pump and the cardiovascular system, and the current situations such as aspiration, reflux and the like are easy to occur in actual clinical application, so that the heart failure treatment effect is seriously affected. Therefore, it is necessary to monitor the pressure during the operation of the catheter pump in real time, and to avoid the extreme phenomena such as suction and backflow by controlling the catheter pump.

The size of the catheter pump to be implanted percutaneously needs to be smaller than conventional implantable blood pumps to meet the requirements for smooth passage through the femoral artery and aorta. Typically, the catheter pump has a diameter of less than 18Fr/6mm. Therefore, the size of the pressure sensor probe is as small as possible on the basis of meeting the measurement precision, the pressure sensor probe is convenient to be installed on the surface of the catheter pump housing, and the scratch of the catheter pump to human tissues and organs during implantation is reduced. The pressure sensor probe can be fixed on the blood pump shell through medical glue bonding or laser welding, but because the size of the sensor probe is smaller, high requirements are put on bonding and welding processes in the process of actually assembling the pressure sensor. In addition, the glue in the bonding process can have a certain influence on the accuracy of the sensor, and the existing sensor often seals the probe in the catheter pump shell, so that the probe cannot directly contact blood for pressure measurement, and the measurement accuracy is poor.

Therefore, how to improve the technical defects existing in the prior art is a problem to be solved by the person skilled in the art.

Disclosure of Invention

The invention aims to provide a catheter pump assembly, a catheter pump and a fixing method of a sensing device, wherein the sensing device can be firmly fixed on the outer side wall of a pump shell and directly contacted with fluid to measure parameters, so that the measuring accuracy is extremely high, and the physiological control effect of the catheter pump is effectively improved.

The technical scheme provided by the invention is as follows:

a catheter pump assembly comprising:

the pump casing is provided with an inflow port for inflow of fluid and an outflow port for outflow of fluid, and a first installation station is arranged at the position, close to the outflow port, of the outer side wall of the pump casing;

a sensing device having a probe;

the cover plate is covered on the first installation station and forms an installation space for accommodating the probe together with the first installation station;

the cover plate is provided with a first avoiding hole for avoiding the probe, so that the probe is in contact with the fluid; and the cover plate is provided with a glue injection hole for injecting glue into the installation space.

In some embodiments, the glue in the installation space is injected through the glue injection hole, and the thickness of the glue in the radial direction of the pump shell is not more than the thickness of the probe in the radial direction of the pump shell.

In some embodiments, the pump housing is of cylindrical configuration, and a face of the cover plate facing the first mounting station is a concave arc face;

the radius of the pump shell is larger than that of the arc surface of the cover plate.

In some embodiments, a transmission cable is connected to one end of the probe away from the inflow port, and the transmission cable is used for connecting an external screen display device;

the outer side wall of the pump shell is provided with a second installation station used for fixing the transmission cable, and the second installation station is communicated with the first installation station;

the cover plate is a concave arc surface facing the first installation station, a gap is formed between the cover plate and the outer side wall of the pump shell, and the cover plate is suitable for being connected with the probe through the gap.

In some embodiments, the first mounting station and the probe are contoured and the second mounting station has a cross-sectional size that is smaller than the cross-sectional size of the first mounting station to limit the probe from moving axially along the pump housing or circumferentially along the pump housing.

In some embodiments, the outer side wall of the pump casing is provided with a fixing groove at two sides of the first installation station in the circumferential direction of the pump casing, and the fixing groove is used for fixing two ends of the cover plate in the circumferential direction of the pump casing.

In some embodiments, the cover plate is fixed to the fixing groove by glue at both ends in the pump housing circumferential direction, or the cover plate is fixed to the fixing groove by welding at both ends in the pump housing circumferential direction.

In some embodiments, the second installation station is provided with an overflow trough, and a certain distance is preset between the overflow trough and the first installation station; a kind of electronic device with high-pressure air-conditioning system

An overflow hole is formed in the cover plate corresponding to the overflow groove;

and/or

The transmission cable is fixed in through gluing the second installation station, just the second installation station is equipped with the storage glue groove for hold glue and stabilize the transmission cable with the gluey fixed of second installation station.

In some embodiments, the end of the second mounting station away from the first mounting station is provided with a via through which the transmission cable can pass, so that the end of the transmission cable away from the probe penetrates into the pump shell and penetrates out of the end of the pump shell away from the inflow port;

and/or

The cover plate is arranged on the first installation station, the cover plate is arranged on the second installation station, one side of the cover plate, which is away from the first installation station, is an outwards-protruding arc surface, and two end faces of the cover plate in the axial direction of the pump shell and two end faces of the cover plate in the circumferential direction of the pump shell are both outwards-protruding arc surfaces.

The invention also provides a catheter pump which comprises an impeller, a motor for driving the impeller to rotate, and a catheter pump assembly provided by any one of the above;

the pump shell comprises a first shell with an opening and a second shell covered on the opening;

the first shell and the second shell jointly form a first cavity, a second cavity is formed in the second shell, the impeller is arranged in the first cavity, and the motor is arranged in the second cavity;

the first shell is provided with an inflow port at one end far away from the second shell, and a plurality of outflow ports around the central axis of the first shell; the probe is arranged on the outer side wall of the first shell, and the plurality of outflow openings are all positioned on one side of the probe facing the second shell;

the impeller is driven by the motor to pump fluid into the first chamber through the inflow port and then discharge the fluid through the outflow port.

The invention also provides a fixing method of the sensing device, which is suitable for the catheter pump provided by the invention;

one end of the probe, which is far away from the inflow port, is connected with a transmission cable; the outer side wall of the pump shell is provided with a second installation station used for fixing the transmission cable, and the second installation station is communicated with the first installation station;

gluing the transmission cable to the second mounting station;

placing the probe in the first mounting station;

the cover plate is fixed on the outer side wall of the pump shell, so that the first avoidance hole is opposite to the probe;

injecting glue into the installation space through the glue injection hole, so that the probe is fixedly connected with the first installation station, and the thickness of the glue injected into the installation space in the radial direction of the pump shell is not more than the thickness of the probe in the radial direction of the pump shell;

and placing the assembled pump shell, cover plate and sensing device in a temperature control box to solidify glue.

The invention has the technical effects that:

1. in this patent, through setting up the apron to make its lid establish on the first installation station that is close to the egress opening of pump case lateral wall, form the installation space that is used for holding the probe jointly with first installation station, make sensing device's probe can be directly fixed at the pump case lateral wall. At this moment, offer the first hole of dodging that is used for dodging of probe on the apron, just can make probe direct contact fluid survey to improve the parameter precision that sensing device detected, and then improve the physiological control effect of catheter pump, more be favorable to the user to the supercharging effect of fluid according to the parameter real-time adjustment catheter pump that detects, in order to avoid the emergence of extreme phenomena such as suction, reflux, improve heart failure patient's clinical treatment effect. Moreover, the probe in this patent sets up between apron and first installation station, and at this moment, the setting of apron is in one side, has weakened the impact of fluid to the probe, can avoid the probe to become flexible because of receiving the fluid impact, guarantees the stable fixed of sensing device and pump case, can reduce the influence of fluid impact to the probe precision again, further improves the performance of probe. On the other hand, when the catheter pump is implanted into a human body, the cover plate is extruded by external force instead of the probe, so that the probe can be effectively prevented from being rubbed by human tissues, and the physical damage to the probe caused by the catheter pump in the implantation process is reduced. In addition, the first installation site that sets up in this patent can reduce the probe protrusion in the radial dimension size at pump case position to reduce the apron protrusion in the radial dimension size at pump case position, and then reduce the whole radial dimension size of catheter pump, be favorable to improving the trafficability characteristic of catheter pump in the art, avoid the catheter pump to implant and withdraw from the in-process, fish tail human inside, improved the security of catheter pump.

2. In this patent, pour into the thickness size of glue in the installation space in pump case radial direction into, not surpass the size of probe in pump case radial direction thickness into, can prevent that glue from producing adverse effect to the detection precision of probe.

3. In this patent, the pump case is cylindric structure, and the apron is the arc surface of indent towards the one side of first installation station to and, the radius size of pump case is greater than the radius size of the arc surface of apron. Thus, on one hand, the size of the installation space can be increased, so that the glue containing amount of the installation space is increased, and the stability of fixing the probe is improved; on the other hand, the arc surface of the cover plate can play a role in guiding flow to a certain extent, so that the glue is uniformly distributed in the installation space, and the fixing effect on the probe is better. In addition, the radius size of pump case is greater than the radius size of the arc surface of apron, thereby can also form the clearance that is convenient for transmission cable to pass between apron and pump case and be connected to the probe, and structural setting is reasonable, and the practicality is strong.

4. In this patent, the profile looks adaptation of first installation station and probe can restrict the probe along pump case axial float, can restrict the probe again along pump case circumference float to play certain positioning action in the assembly process, the quick assembly of probe and first installation station of being convenient for. Meanwhile, the size of the cross section of the second installation station is smaller than that of the first installation station, and the second installation station is matched with the first installation station, so that the probe can be further limited from moving along the axial direction of the pump shell, the translation of the probe is greatly reduced, and the stable fixation of the probe and the first installation station is further improved. In contrast, when the fixed groove on the pump shell is connected with the two ends of the cover plate in the circumferential direction of the pump shell, the fixed groove can also play a role in limiting the translation of the cover plate, is firmly fixed, is more beneficial to the assembly of the cover plate, and is convenient for a user to inject glue into the installation space through the glue injection hole.

5. In the patent, one surface of the cover plate, which is away from the first installation station, is an outwards convex arc surface, and two end surfaces of the cover plate in the axial direction of the pump shell and two end surfaces of the cover plate in the circumferential direction of the pump shell are outwards convex arc surfaces, so that the cover plate can be prevented from scratching internal tissues of a human body, and the safety of the catheter pump is further improved; but also can prevent the cover plate from scratching other parts, thereby prolonging the service life and the practical performance of the catheter pump. It is worth noting that by improving the actual performance of the catheter pump, the blood compatibility of the catheter pump can be effectively improved, so that the occurrence probability of thrombus and hemolysis is reduced, and the operation risk is reduced. In addition, the cover plate is arranged on the two ends of the pump shell in the circumferential direction in an outwards convex arc surface manner, so that the adhesion of glue is facilitated, and a user can firmly fix the cover plate in the fixing groove.

Drawings

The invention is described in further detail below with reference to the attached drawings and detailed description:

FIG. 1 is a schematic perspective view of a catheter pump according to the present invention in one state;

FIG. 2 is a schematic perspective view of a first housing according to the present invention;

FIG. 3 is a schematic perspective view of a second housing according to the present invention;

FIG. 4 is a schematic perspective view of a sensing device according to the present invention;

FIG. 5 is a schematic view of an assembly of a first housing, a cover plate and a sensing device provided by the present invention;

FIG. 6 is a schematic perspective view of a cover plate in a state according to the present invention;

FIG. 7 is a schematic perspective view of a cover plate in another state according to the present invention;

fig. 8 is a schematic perspective view of a catheter pump according to the present invention in another state.

Reference numerals illustrate:

100. a pump housing; 110. a first housing; 111. a first mounting station; 112. an outflow port; 113. a support rod; 114. a fixing groove; 115. an inflow port; 120. a second housing; 121. perforating; 122. a butt joint part; 1221. a thread; 130. a second mounting station; 131. a first split; 1311. an overflow trough; 1312. a glue storage groove; 132. a second split; 1321. a via hole;

200. a sensing device; 210. a probe; 211. a sensing region; 220. a transmission cable;

300. a cover plate; 310. a first avoidance hole; 320. a glue injection hole; 330. an installation space; 340. an overflow aperture;

400. a glue layer;

500. an impeller.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.

For simplicity of the drawing, only the parts relevant to the invention are schematically shown in each drawing, and they do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

In this context, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; 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 will be understood in specific cases by those of ordinary skill in the art.

In the embodiment shown in the drawings, indications of orientation (such as up, down, left, right, front and rear) are used to explain the structure and movement of the various components of the invention are not absolute but relative. These descriptions are appropriate when the components are in the positions shown in the drawings. If the description of the location of these components changes, then the indication of these directions changes accordingly.

In addition, in the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-8, a catheter pump assembly, a catheter pump, and a method of securing a sensing device 200 are provided according to one embodiment of the present invention. The catheter pump assembly may specifically include a pump housing 100, a sensing device 200, and a cover plate 300, where the pump housing 100 has an inflow port 115 into which fluid flows and an outflow port 112 from which fluid flows, and a first installation station 111 is disposed at a position of an outer sidewall of the pump housing 100 near the outflow port 112. The sensor device 200 has a probe, a cover plate is arranged on the first mounting station 111, and forms a mounting space 330 for accommodating the probe 210 together with the first mounting station 111. At this time, the cover plate 300 is provided with a first escape hole 310 for escaping the probe 210, and a glue injection hole 320 for injecting glue into the installation space 330. Specifically, the sensing area 211 of the probe 210 for detecting pressure is located on a side of the probe 210 away from the first mounting station 111, so that the sensing area 211 of the probe 210 can directly contact the fluid through the first avoidance hole 310 to detect a parameter of the fluid (such as a fluid temperature, a fluid flow rate, or a fluid pressure).

The catheter pump provided in this embodiment is preferably a micro axial flow catheter pump, and by providing the cover plate 300 and covering the cover plate on the first mounting station 111 of the outer side wall of the pump casing 100 near the outflow port 112, a mounting space 330 for accommodating the probe 210 is formed together with the first mounting station 111, so that the probe 210 of the sensing device 200 can be directly fixed on the outer side wall of the pump casing 100. At this time, the first avoidance hole 310 for avoiding the probe 210 is formed in the cover 300, so that the probe 210 can directly contact with the fluid to detect, thereby improving the accuracy of the parameter detected by the sensing device 200, and further improving the physiological control effect of the catheter pump. Preferably, the sensing device 200 in this embodiment is a pressure sensing device, so that a user can adjust the pressurizing effect of the catheter pump on the fluid in real time according to the detected parameters, thereby avoiding the extreme phenomena such as pumping, backflow and the like, and improving the clinical treatment effect of the heart failure patient.

It should be noted that, the probe 210 in the present embodiment is disposed between the cover 300 and the first mounting station 111, and at this time, the arrangement of the cover 300 on the one hand reduces the impact of the fluid on the probe 210, which not only can avoid the loosening of the probe 210 due to the impact of the fluid, ensure the stable fixing of the sensing device 200 and the pump housing 100, but also can reduce the influence of the impact of the fluid on the accuracy of the probe 210, and further improve the usability of the probe 210. On the other hand, when the catheter pump is implanted into a human body, the cover plate 300 is extruded by external force instead of the probe 210, so that the probe 210 is effectively prevented from being rubbed by human tissues, and the physical damage to the probe 210 caused by the catheter pump in the implantation process is reduced.

In addition, the first installation station 111 provided in this embodiment can reduce the radial size of the probe 210 protruding from the pump casing 100, thereby reducing the radial size of the cover plate 300 protruding from the pump casing 100, further reducing the radial size of the whole catheter pump, being beneficial to improving the trafficability of the catheter pump during operation, avoiding the catheter pump from scratching the inside of the human body during implantation and withdrawal, and improving the safety of the catheter pump.

It should be noted that, referring to fig. 1 and fig. 5 to fig. 8, the cover plate 300 in the present embodiment is further provided with a glue injection hole 320, and a user can directly inject glue into the glue injection hole 320 by using an injector, so that the glue uniformly fills the mounting space 330, the contact area between the probe 210 and the glue is increased, and a glue layer 400 is formed, thereby fixing the probe 210 on the first mounting station 111 more firmly.

The thickness of the glue injected into the installation space 330 through the glue injection hole 320 in the radial direction of the pump casing 100 should not exceed the thickness of the probe 210 in the radial direction of the pump casing 100.

In the prior art, the probe 210 of the medical sensing device 200 has a small size, for example, the probe 210 has a diameter of 0.33mm and a length of 2.2mm, and is difficult to fix, so that the probe 210 is usually fixed by clamping and surface coating, but the two fixing methods easily affect the detection accuracy of the probe 210. In this embodiment, the mounting space 330 into which glue can be injected is formed between the cover plate 300 and the first mounting station 111, and the glue injected into the mounting space 330 has a thickness in the radial direction of the pump casing 100 not exceeding the thickness of the probe 210 in the radial direction of the pump casing 100, so that the probe 210 can be fixed while the sensing area 211 of the probe 210 is not covered, and the sensing area 211 of the probe 210 can be contacted with blood as much as possible, thereby reducing the influence of external factors on the measurement accuracy of the probe 210.

In the present embodiment, referring to fig. 1 and 4 to 8, the shape of the probe 210 is cylindrical, but in practical production, the shape of the probe 210 may be a triangular prism, a quadrangular prism, a spherical geometry with a certain thickness or diameter, which is not limited herein, and is within the scope of the present invention. In contrast, in the present embodiment, although the glue injection holes 320 are in a circular hole structure and four in number and evenly spaced around the first avoiding holes 310, in actual production, the shape, the number and the distribution manner of the glue injection holes can be flexibly set according to the actual situation, which is not limited herein, and the present invention is within the scope of protection.

Specifically, referring to fig. 1 to 3, the pump housing 100 includes a first housing 110 having an opening and a second housing 120 covering the opening. The first housing 110 and the second housing 120 together form a first chamber adapted to mount an impeller 500; the second housing 120 has a second chamber therein adapted to receive a motor for driving the impeller 500. The end of the first housing 110 far away from the second housing 120 is provided with an inflow port 115, and the first housing 110 is provided with a plurality of outflow ports 112 around its central axis.

At this time, referring to fig. 1, 5 and 8, the probe 210 is disposed on the outer side wall of the first housing 110, and the plurality of outflow openings 112 are all located on a side of the probe 210 facing the second housing 120. When the impeller 500 is rotated by the motor, fluid can be drawn into the first chamber through the inflow port 115 and then discharged through the outflow port 112. In this manner, probe 210 is able to detect the fluid pressure outside of flow outlet 112.

Preferably, the impeller 500 is located in the central region of the first chamber, and the inflow port 115 is disposed coaxially with the impeller 500, so that the pumping action of the impeller 500 on the fluid can be effectively improved, and the performance of the catheter pump can be improved.

Specifically, when the catheter pump is implanted in a human body, blood flows through the inflow port 115 of the first housing 110, the impeller, and finally flows out of the outflow port 112 into an arterial vessel in order by the rotational driving of the impeller 500. At this time, the sensing device 200 can obtain the human body's aortic pressure by measuring the blood pressure outside the outflow port 112, thereby monitoring the physiological parameter variation of the cardiovascular system of the human body in real time, and changing the rotation speed of the impeller 500 by the feedback of the pressure data, thereby realizing the physiological control during the catheter pump assisted treatment of the heart failure patient. The occurrence of adverse events such as suction and reflux is avoided while the blood pulsatility of the aorta is improved, and the heart failure patient clinical quality effect and life quality are improved.

Further, referring to fig. 1, the second housing 120 has a tapered structure toward one end of the first housing, a small end of the tapered structure is disposed toward the impeller 500, and a large end of the tapered structure is located at the outflow port 112 to guide the fluid in the first chamber to flow out of the outflow port 112.

Further, referring to fig. 1, 2, 5 and 8, a strut 113 is formed between each two adjacent outflow openings 112, so that the structural strength of the first housing 110 is improved, the catheter pump has better overall strength, the service life of the catheter pump is prolonged, and meanwhile, the safety of the catheter pump is also ensured.

In one embodiment, referring to fig. 1-3 and 5 and 8, the outer sidewall of the pump housing 100 is provided with a second mounting station 130 for securing the transmission cable 220, and the second mounting station 130 communicates with the first mounting station 111. The surface of the cover plate 300 facing the first installation station 111 is a concave arc surface, and a gap is formed between the concave arc surface and the outer side wall of the pump casing 100, so that the transmission cable 220 is suitable for being connected to the probe 210 through the gap. At this time, the gap formed between the cover plate 300 and the outer sidewall of the pump case 100 may further enlarge the size of the installation space 330 to some extent, which is helpful for storing a large amount of glue, thereby increasing the contact area between the probe 210 and the glue, and thus, more firmly fixing the probe 210 between the first installation site 111 and the cover plate 300.

Specifically, the pump casing 100 has a cylindrical configuration, and in this case, in order to form a gap between the circular arc surface of the cover plate 300 and the outer side wall of the pump casing 110, the radius of the circular arc surface of the cover plate 300 and the radius of the pump casing 100 should be inconsistent, i.e., the arc of the outer side wall of the pump casing 100 should be more gentle than the arc of the circular arc surface of the cover plate 300, and in this case, the radius of the pump casing 100 should be greater than the radius of the circular arc surface of the cover plate 300.

It should be noted that, the surface of the cover plate 300 facing the first installation station 111 is a concave arc surface, which can also play a role in guiding flow. Thus, when the user injects glue into the glue injection hole 320 by using the injector, the glue can flow to the peripheral edge of the installation space 300 along the circular arc surface of the cover plate 300 and then be gathered together, so that the glue can uniformly fill the installation space 330 layer by layer until the proper position.

Preferably, referring to fig. 5 to 8, the cover 300 may have an arc-shaped plate structure, i.e., the surface of the cover 300 facing away from the first installation station 111 is an arc surface with a convex shape similar to the contour of the arc surface of the cover 300 facing toward the first installation station 111, so as to avoid the catheter pump from scratching the inside of a human body during the implantation and withdrawal process, thereby improving the safety and practical performance of the catheter pump. It is worth noting that by improving the actual performance of the catheter pump, the blood compatibility of the catheter pump can be effectively improved, so that the occurrence probability of thrombus and hemolysis is reduced, and the operation risk is reduced.

Further, the cover 300 is provided with a first sealing plate at one end facing the inflow port 115, so that the side of the installation space 330 facing the inflow port 115 can be sealed, the glue layer 400 and the probe 210 in the installation space 330 can be prevented from being flushed by fluid, and the connection strength between the probe 210 and the first installation station 111 and the cover 300 is further reinforced.

Of course, in actual production, a second sealing plate may be disposed at an end of the cover plate 300 facing the transmission cable 220 to seal a side of the installation space 330 facing away from the inflow port 115. However, at this time, a second avoiding hole should be formed at a position of the second sealing plate corresponding to the transmission cable 220, so that the transmission cable 220 passes through.

Specifically, referring to fig. 2 and 4, the profiles of the first mounting station 111 and the probe 210 are adapted, at this time, the distance between the two sidewalls of the first mounting station 111 in the axial direction of the pump casing 100 should be slightly greater than the length of the probe 210 in the axial direction of the pump casing 100, and the distance between the two sidewalls of the first mounting station 111 in the tangential direction of the pump casing 100 should be slightly greater than the length of the probe 210 in the tangential direction of the pump casing 100. In this way, the first installation station 111 can limit the axial movement of the probe 210 along the pump casing 100, and limit the circumferential movement of the probe 210 along the pump casing 100, and plays a certain role in positioning the probe 100 in the assembly process, so that the probe 210 of the sensing device 200 can be more easily placed in the first avoidance hole 311, and the assembly is convenient and quick.

Meanwhile, referring to fig. 1, 2 and 4, the cross section of the second installation station 130 should be smaller than that of the first installation station 111, and the second installation station is matched with the first installation station 111 to further limit the probe 210 from moving along the axial direction of the pump shell, so as to greatly reduce the translation of the probe 210, further improve the stable fixation of the probe 210 and the first installation station 111, reduce the falling probability of the cover plate 300 under the action of external force, and improve the practical performance and safety of the catheter pump.

Specifically, referring to fig. 2 and 5, the outer side walls of the pump housing 100 are located at both sides of the first mounting station 111 in the circumferential direction of the pump housing 100, and a fixing groove 114 is provided for fixing both ends of the cover 300 in the circumferential direction of the pump housing 100. At this time, the fixing groove 114 on the pump casing 100 can also limit the translation of the cover plate 300 by limiting the two ends of the cover plate 300 in the circumferential direction of the pump casing 100, so that the fixing is firm. Moreover, since the radius of the circular arc surface of the pump case 100 is greater than that of the cover plate 300, when the cover plate 300 is fixed to the fixing groove 114 at both ends of the pump case 100 in the circumferential direction, the cover plate 300 arches at the outer side wall of the pump case 100 to form a mounting space 330 having a large space volume for storing glue. Therefore, restricting the translation of the cover plate 300 is also more beneficial to the assembly of the cover plate 300, and facilitates the injection of glue into the installation space 330 by the user through the glue injection holes 320.

Specifically, both ends of the cover plate 300 in the circumferential direction of the pump case 100 are fixed to the fixing groove 114 by gluing. Of course, in actual production, both ends of the cover plate 300 in the circumferential direction of the pump case 100 can also be fixed to the fixing groove 114 by welding. At this time, referring to fig. 1, 2 and 5 to 8, a minute gap is formed between the cover plate 300 and the corresponding fixing groove 114 at both ends of the pump case 100 in the circumferential direction, and the gap may serve as a weld to connect the cover plate 300 and the fixing groove 114, wherein the cover plate 300 and the fixing groove 114 are preferably welded together by laser welding.

By adopting the welding fixation mode, the fixation of the cover plate 300 and the fixing groove 114 can be more reliable and the stability is better compared with the gluing fixation mode. In addition, in actual production, the welding fixing mode and the adhesive fixing mode can be combined, and the welding fixing mode and the adhesive fixing mode can be simultaneously applied to the fixed connection of the cover plate 300 and the fixing groove 114, so that the stability of the cover plate 300 and the fixing groove 114 can be further improved.

Preferably, both end surfaces of the cover plate 300 in the axial direction of the pump casing 100 and both end surfaces of the cover plate 300 in the circumferential direction of the pump casing 100 are convex arc surfaces. Thus, the cover plate 300 can be prevented from scratching internal tissues of a human body, and the safety of the catheter pump is further improved; but also can prevent the cover plate 300 from scratching other parts, thereby prolonging the service life and improving the practical performance of the catheter pump. In addition, the cover plate 300 has convex circular arc surfaces at both ends of the pump case 100 in the axial direction, which is also advantageous for adhesion of glue, so that the user stably fixes the cover plate 300 to the fixing groove 114.

Preferably, referring to fig. 2 to 5, the second installation station 130 for fixing the transmission cable 220 has a semicircular groove in cross section, so as to adapt to the profile of the transmission cable 220, and thus, a better cable arrangement effect can be achieved, and the structural arrangement is reasonable. In addition, the second installation station 130 can effectively reduce the overall radial dimension of the catheter pump, which is beneficial to improving the passing performance of the catheter pump in operation, reducing the radial dimension of the transmission cable 220 protruding from the pump housing 100, avoiding the catheter pump from scratching the inside of human body during the implantation and withdrawal process, and improving the safety of the catheter pump

In particular, referring to fig. 1-3, the second mounting station 130 includes a first split 131 and a second split 132. The first split 131 is disposed on the first housing 110 and on the supporting rod 113 corresponding to the first mounting station 111, and the second split 132 is disposed on the second housing 120. When the first housing 110 and the second housing 120 are fixedly connected, the first split 131 and the second split 132 are communicated to form the second mounting station 130.

Specifically, referring to fig. 3, the end of the second mounting station 130 facing the second end of the pump housing 100 is provided with a via 1321 through which the transmission cable 220 passes, such that the end of the transmission cable 220 remote from the probe 210 penetrates into the interior of the pump housing 100 and exits from the end of the pump housing 100 remote from the inflow port 115.

The via 1321 through which the transmission cable 220 passes should be disposed in the second housing 120 and be in communication with the second chamber inside the second housing 120, and an end of the transmission cable 220 away from the probe 210 enters the second chamber through the via 1321. In contrast, the end of the second housing 120 far away from the first housing 110 is provided with a through hole 121, and at this time, the end of the transmission cable 220 far away from the probe 210 passes through the through hole 121, so that the probe 210 is electrically connected to the external display device, and the parameter detected by the probe 210 can be acquired and displayed by the external display device.

In one embodiment, referring to fig. 3, the second housing 120 extends along the contour edge of the through hole 121 toward an end far from the first housing 110 to form a docking portion 122, and an outer sidewall of the docking portion 122 is provided with threads 1221 for docking with an external device. Preferably, the first butt joint and perforation 121 and the inflow port and impeller are coaxially arranged, so that the overall structure arrangement of the catheter pump is optimized, and the catheter pump is attractive in appearance and high in practicability.

The transmission cable 220 may be specifically fixed to the second mounting station 130 by glue, and preferably, the second mounting station 130 is provided with a glue storage groove 1312 for accommodating a large amount of glue, so as to further stabilize the glue fixing of the transmission cable 220 and the second mounting station 130 on the basis of the original glue fixing.

Specifically, referring to fig. 2, the glue storage tank 1312 is a semicircular groove, which is disposed at an end of the first split 131 far away from the first installation station 111, and the radius of the cross section of the glue storage tank 1312 is far greater than the radius of the transmission cable 220, specifically may be 2-6 times the radius of the transmission cable 220, and the fixing of the transmission cable 220 is reinforced by accommodating a large amount of glue.

Of course, in actual production, the glue storage groove 1312 may also be disposed at one end of the second split 132 facing the first split 131; or any other location of the second mounting station 130; even more than one glue reservoir 1312 may be provided and evenly disposed at the second mounting station 130, and this example only illustrates some possible embodiments, and is not limited thereto, and is within the scope of the present invention.

Preferably, referring to fig. 2, the second installation station 130 is provided with an overflow groove 1311 near the first installation station 111, a certain distance is preset between the overflow groove 1311 and the first installation station 111, and an overflow hole 340 is provided at a position of the cover plate 100 corresponding to the overflow groove 1311. The cross section of the overflow groove 1311 is preferably a semicircular groove, and the radius of the cross section of the overflow groove 1311 is far greater than the radius of the transmission cable 220, specifically may be 2-6 times the radius of the transmission cable 220. In one aspect, the overflow trough 1311 can store excess glue in the mounting space 330, which can serve to assist in securing the transmission cable 220 to some extent; on the other hand, glue can be injected into the overflow groove 1311 through the overflow holes 340, so that the fixing of the transmission cable 220 is reinforced, and the glue in the installation space 330 is increased, so that the fixing of the probe 220 is reinforced.

In this embodiment, a predetermined distance is provided between the overflow trough 1311 and the first mounting station 111 to prevent the overflow trough 1311 from being disposed next to the first mounting station 111, thereby affecting the positioning of the probe 220 by the first mounting station 111 and the second mounting station 130.

Referring to fig. 1 and 8, the present invention further provides a catheter pump, which includes an impeller 500, a motor for driving the impeller 500 to rotate, and a catheter pump assembly provided by any of the foregoing embodiments. Among them, as mentioned in the above embodiments, the pump case 100 includes a first case 110 having an opening and a second case 120 covering the opening. The first housing 110 and the second housing 120 together form a first chamber, a second chamber is provided inside the second housing 120, the impeller 500 is provided in the first chamber, and the motor is provided in the second chamber. The end of the first housing 110 far away from the second housing 120 is provided with an inflow port 115, and the first housing 110 is provided with a plurality of outflow ports 112 around its central axis.

At this time, the probe 210 is disposed on the outer side wall of the first housing 110, and the plurality of outflow openings 112 are all located on a side of the probe 210 facing the second housing 120. When the impeller 500 is rotated by the motor, fluid can be drawn into the first chamber through the inflow port 115 and then discharged through the outflow port 112. In this manner, probe 210 is able to detect the fluid pressure outside of flow outlet 112.

Further, the invention also provides a method for fixing the sensing device 200, which is suitable for the catheter pump provided by the above embodiment, and specifically comprises the following steps:

first, the positions of the probe 210 and the transmission cable 220 with respect to the first mounting station 111 and the second mounting station 130 are sorted. The transmission cable 220 is then secured to the second split 132 and the via 1321 of the second mounting station 130 by potting. Next, glue is applied to the glue reservoir 1312 and the first split 131 of the second mounting station 130 to complete the fixing of the transmission cable.

Thereafter, a small amount of glue is now applied to the first mounting station 111 and the cover plate 300 is placed into the first mounting station 111. Then, the cover plate 300 is covered, and both ends of the cover plate 300 in the circumferential direction of the pump case 100 are respectively fixed in the corresponding fixing grooves 114. The cover plate 300 and the fixing groove 114 are fixed by gluing and welding respectively.

After the cover plate 300 is fixed, a user firstly injects glue into the installation space 330 through the glue injection hole 320 by using the injector, and ensures that the sensing area 211 of the probe 210 is not covered by the glue as much as possible. Then, a proper amount of glue is injected into the overflow groove 1311 through the overflow holes 340, so that the part of the transmission cable 220 close to the probe 210 is reinforced, and the probe 210 and the transmission cable 220 are prevented from falling off.

In addition, in order to further stabilize the fixed cover 300, prevent the cover 300 and the probe 210 from being loosened due to friction force during the implantation process, and prevent the edge of the cover 300 from damaging the human body during the implantation process, it is necessary to apply glue to both ends of the cover 300 in the axial direction of the pump casing 100 and both ends of the cover 300 in the circumferential direction of the pump casing 100, fix the cover 300 to the pump casing 100 more firmly by the glue, and make the edge of the cover 300 smoothly transition. If the cover 300 has a first sealing plate at an end facing the inflow port 115 and/or a second sealing plate at an end of the cover 300 facing the transmission cable 220, glue should be applied to both ends of the first sealing plate and/or the second sealing plate in the axial direction of the pump casing 100 and both ends of the first sealing plate and/or the second sealing plate in the circumferential direction of the pump casing 100, so that edges of the first sealing plate and/or the second sealing plate smoothly transition.

Finally, the above components with glue are placed in a temperature control box for curing, and the integration of the sensing device 200 on the pump housing 100 is achieved.

In the foregoing embodiments, the descriptions of the embodiments are focused on, and the parts of a certain embodiment that are not described or depicted in detail may be referred to in the related descriptions of other embodiments.

It should be noted that the above embodiments can be freely combined as needed. The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. A catheter pump assembly, comprising:

a sensing device having a probe;

2. The catheter pump assembly of claim 1, wherein,

and injecting glue into the installation space through the glue injection hole, wherein the thickness of the glue in the radial direction of the pump shell is not more than that of the probe in the radial direction of the pump shell.

3. Catheter pump assembly according to claim 1 or 2, characterized in that,

the pump shell is in a cylindrical structure, and one surface of the cover plate facing the first installation station is an inward concave arc surface;

4. Catheter pump assembly according to claim 1 or 2, characterized in that,

one end of the probe, which is far away from the inflow port, is connected with a transmission cable, and the transmission cable is used for connecting external screen display equipment;

5. The catheter pump assembly of claim 4, wherein the catheter pump assembly comprises,

the first installation station is matched with the profile of the probe, and the cross section size of the second installation station is smaller than that of the first installation station, so that the probe is limited to move along the axial direction of the pump shell or along the circumferential direction of the pump shell.

6. The catheter pump assembly of claim 5, wherein,

the outer side wall of the pump shell is positioned at the first installation station, and both sides of the outer side wall of the pump shell in the circumferential direction of the pump shell are respectively provided with a fixing groove used for fixing both ends of the cover plate in the circumferential direction of the pump shell.

7. The catheter pump assembly of claim 6, wherein the catheter pump assembly comprises,

the two ends of the cover plate in the circumferential direction of the pump shell are fixed in the fixing groove through glue, or the two ends of the cover plate in the circumferential direction of the pump shell are fixed in the fixing groove through welding.

8. The catheter pump assembly of claim 4, wherein the catheter pump assembly comprises,

the second installation station is provided with an overflow groove, and a certain distance is preset between the overflow groove and the first installation station; a kind of electronic device with high-pressure air-conditioning system

and/or

9. The catheter pump assembly of claim 4, wherein the catheter pump assembly comprises,

the second installation station is provided with a through hole for the transmission cable to pass through at one end far away from the first installation station, so that one end far away from the probe of the transmission cable penetrates into the pump shell and penetrates out from one end far away from the inflow port of the pump shell;

and/or

10. A catheter pump, comprising:

an impeller, a motor for driving the impeller to rotate, and the catheter pump assembly of any one of claims 1-9;

11. A method of securing a sensing device, adapted to the catheter pump of claim 10,

gluing the transmission cable to the second mounting station;

placing the probe in the first mounting station;