Catheter pump assembly, catheter pump and method of securing a sensor device

Abstract

The application discloses a catheter pump assembly, a catheter pump and a fixing method of a sensing device. The catheter pump assembly comprises a pump shell, a sensing device and a cover plate. The pump shell has a flow inlet and a flow outlet. A first installation station is arranged on the outer side of the pump shell close to the flow outlet. The sensing device has a probe. The cover plate is arranged on the first installation station and forms an installation space together with the first installation station, which can accommodate the probe. The cover plate is provided with a first avoiding hole which can avoid the probe, so that the probe can be in contact with the fluid. In addition, the cover plate is provided with a glue injection hole which can inject glue into the installation space. According to the application, the probe of the sensing device is directly fixed on the outer side wall of the pump shell through the cover plate. The probe can directly contact the fluid for detection, the parameter precision of detection and the physiological control effect of the catheter pump are improved, and the probe can not be loosened due to the impact of the fluid, so that the stable fixation of the sensing device and the pump shell is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a catheter pump assembly, a catheter pump and a fixing method of a sensing device. BACKGROUND

[0002] In recent years, mechanical circulatory assistance has become an important way for the treatment of cardiovascular critical conditions such as end-stage heart failure and cardiogenic shock, and it plays an important role in improving the hemodynamics of patients. Through the treatment of mechanical circulatory assistance, part of the blood pumping function of the patient's heart is replaced by a mechanical circulatory assistance device, and the heart is effectively rested, which is conducive to the functional recovery of the patient's failing heart. Mechanical circulatory assistance devices include intra-aortic balloon counterpulsation, extracorporeal membrane oxygenation, implantable left ventricular assist devices and interventional catheter pumps.

[0003] Compared with other mechanical circulatory assistance devices, the interventional catheter pump has the characteristics of small trauma and easy implantation, and has good therapeutic effect for high-risk patients such as patients with severe cardiogenic shock. However, the hemodynamic characteristics of the patient are the result of the combined action of the catheter pump and the cardiovascular system, and in actual clinical application, phenomena such as suction and reflux are prone to occur, which seriously affects the treatment effect of heart failure. Therefore, it is necessary to monitor the pressure in the operation process of the catheter pump in real time, and to avoid the occurrence of extreme phenomena such as suction and reflux through catheter pump regulation.

[0004] Compared with traditional implantable blood pumps, the size of the percutaneously implanted catheter pump needs to be smaller to meet the requirements of smoothly passing through the femoral artery and the aorta. Generally speaking, the diameter of the catheter pump is less than 18Fr / 6mm. Therefore, the size of the pressure sensor probe should be as small as possible on the basis of meeting the measurement accuracy, so as to facilitate the installation on the surface of the catheter pump shell and reduce the scratching of human tissues and organs when the catheter pump is implanted. The pressure sensor probe can be fixed on the blood pump shell by medical glue bonding or laser welding, but due to the relatively small size of the sensor probe, high requirements are put forward for the bonding and welding process in the actual assembly of the pressure sensor. In addition, the glue used in the bonding process may have a certain impact on the accuracy of the sensor, and moreover, the existing sensor often seals the probe inside the catheter pump shell, so that the probe cannot directly contact the blood for pressure measurement, and the measurement accuracy is poor.

[0005] Therefore, how to improve the technical defects existing in the prior art has always been a problem to be solved by ordinary skilled in the art. SUMMARY

[0006] The purpose of the present application is to provide a catheter pump assembly, a catheter pump and a fixing method of a sensing device, which can stably fix the sensing device on the outer side wall of the pump shell, directly contact the fluid for parameter measurement, has extremely high measurement accuracy, and effectively improves the physiological control effect of the catheter pump.

[0007] The technical scheme provided by the present application is as follows:

[0008] A catheter pump assembly comprises:

[0009] A pump shell having a fluid inlet and a fluid outlet, and a first mounting station is arranged on the outer wall of the pump shell near the fluid outlet;

[0010] A sensing device having a probe;

[0011] A cover plate is arranged on the first mounting station to form a mounting space for accommodating the probe with the first mounting station;

[0012] The cover plate is provided with a first avoiding hole for avoiding the probe to make the probe contact with the fluid, and the cover plate is provided with a glue injection hole for injecting glue into the mounting space.

[0013] In some embodiments, the thickness of the glue injected into the mounting space through the glue injection hole in the radial direction of the pump shell is not greater than the thickness of the probe in the radial direction of the pump shell.

[0014] In some embodiments, the pump shell has a cylindrical structure, and one side of the cover plate facing the first mounting station is a concave arc surface;

[0015] The radius of the pump shell is greater than the radius of the arc surface of the cover plate.

[0016] In some embodiments, one end of the probe away from the fluid inlet is connected with a transmission cable, and the transmission cable is used to connect an external display device;

[0017] The outer wall of the pump shell is provided with a second mounting station for fixing the transmission cable, and the second mounting station is connected to the first mounting station;

[0018] One side of the cover plate facing the first mounting station is a concave arc surface, and a gap is formed between the arc surface and the outer wall of the pump shell, which is suitable for connecting the transmission cable to the probe through the gap.

[0019] In some embodiments, the first mounting station and the probe are matched in profile, and the cross-sectional size of the second mounting station is smaller than that of the first mounting station, so as to limit the movement of the probe in the axial direction of the pump shell or in the circumferential direction of the pump shell.

[0020] In some embodiments, a fixing groove is arranged on both sides of the first mounting station in the circumferential direction of the pump shell to fix both ends of the cover plate in the circumferential direction of the pump shell.

[0021] In some embodiments, the cover plate is fixed to the fixed groove at both ends in the circumferential direction of the pump shell by adhesion, or the cover plate is fixed to the fixed groove at both ends in the circumferential direction of the pump shell by welding.

[0022] In some embodiments, the second mounting station is provided with an overflow groove, and a distance is preset between the overflow groove and the first mounting station; and

[0023] The cover plate is provided with an overflow hole corresponding to the overflow groove;

[0024] And / or

[0025] The transmission cable is fixed to the second mounting station by adhesion, and the second mounting station is provided with a glue storage groove for accommodating glue to stably fix the transmission cable and the second mounting station by adhesion.

[0026] In some embodiments, the second mounting station is provided with a via hole at one end away from the first mounting station, so that the transmission cable penetrates into the interior of the pump shell from one end away from the probe and penetrates out from one end of the pump shell away from the flow inlet;

[0027] And / or

[0028] The side of the cover plate away from the first mounting station is a convex circular arc surface, and the two end surfaces of the cover plate in the axial direction of the pump shell and the two end surfaces of the cover plate in the circumferential direction of the pump shell are all convex circular arc surfaces.

[0029] The application also provides a catheter pump comprising an impeller, a motor for driving the rotation of the impeller, and the catheter pump assembly provided by any one of the above;

[0030] The pump shell comprises a first shell body having an opening and a second shell body covering the opening;

[0031] The first shell body and the second shell body jointly form a first chamber, and the second shell body is internally provided with a second chamber, the impeller is arranged in the first chamber, and the motor is arranged in the second chamber;

[0032] The first shell body is provided with the flow inlet at one end away from the second shell body, and is provided with a plurality of flow outlets around the central axis thereof; the probe is arranged on the outer side wall of the first shell body, and the plurality of flow outlets are all located on the side of the probe facing the second shell body;

[0033] The impeller, under the driving of the motor, draws fluid into the interior of the first chamber through the flow inlet, and then discharges the fluid through the flow outlets.

[0034] The present invention also provides a method for fixing a sensing device, applicable to the aforementioned conduit pump;

[0035] The probe is connected to a transmission cable at one end away from the inlet; and the outer wall of the pump casing is provided with a second mounting station for fixing the transmission cable, and the second mounting station is connected to the first mounting station.

[0036] The transmission cable is glued to the second installation station;

[0037] Place the probe in the first installation station;

[0038] Fix the cover plate to the outer wall of the pump casing so that the first clearance hole faces the probe;

[0039] Adhesive is injected into the installation space through the injection hole to fix the probe and the first installation station. The thickness of the adhesive injected into the installation space in the radial direction of the pump housing does not exceed the thickness of the probe in the radial direction of the pump housing.

[0040] The assembled pump housing, cover plate, and sensing device are placed in a temperature-controlled chamber to cure the adhesive.

[0041] The technical advantages of this invention are as follows:

[0042] 1. In this patent, a cover plate is installed on the outer wall of the pump casing near the outlet at a first mounting position, forming an installation space to accommodate the probe. This allows the probe of the sensing device to be directly fixed to the outer wall of the pump casing. A first clearance hole is provided on the cover plate to allow the probe to directly contact the fluid for detection, thereby improving the accuracy of the parameters detected by the sensing device. This enhances the physiological control effect of the duct pump and allows users to adjust the pump's pressurization of the fluid in real time based on the detected parameters, avoiding extreme phenomena such as suction and backflow, and improving the clinical treatment effect for heart failure patients. Furthermore, the probe in this patent is positioned between the cover plate and the first mounting position. The cover plate reduces the impact of the fluid on the probe, preventing it from loosening due to fluid impact and ensuring stable fixation of the sensing device and pump casing. It also reduces the impact of fluid impact on probe accuracy, further improving probe performance. On the other hand, when the catheter pump is implanted into the human body, the cover plate, rather than the probe, is the first part subjected to external pressure, which effectively prevents the probe from being damaged by human tissue and reduces physical damage to the probe caused by the catheter pump during implantation. Furthermore, the first installation position designed in this patent reduces the radial dimension of the probe protruding from the pump housing, thereby reducing the radial dimension of the cover plate protruding from the pump housing, and consequently reducing the overall radial dimension of the catheter pump. This improves the catheter pump's maneuverability during surgery, prevents the catheter pump from scratching the internal organs during implantation and withdrawal, and enhances the safety of the catheter pump.

[0043] 2. In this patent, the thickness of the adhesive injected into the installation space in the radial direction of the pump housing does not exceed the thickness of the probe in the radial direction of the pump housing, which can prevent the adhesive from adversely affecting the detection accuracy of the probe.

[0044] 3. In this patent, the pump housing has a cylindrical structure, and the side of the cover plate facing the first installation position is a concave arc surface. Furthermore, the radius of the pump housing is larger than the radius of the arc surface of the cover plate. This increases the installation space, thereby increasing the amount of adhesive that can be contained within the installation space and improving the stability of the probe fixation. Additionally, the arc surface of the cover plate can act as a guide, ensuring the adhesive is evenly distributed within the installation space, resulting in better probe fixation. Moreover, the larger radius of the pump housing compared to the arc surface of the cover plate creates a gap between the cover plate and the pump housing, facilitating the passage of transmission cables to the probe. The structure is rationally designed and highly practical.

[0045] 4、In the patent, the profile of the first mounting station and the probe is matched, which can not only limit the axial movement of the probe along the pump shell, but also limit the circumferential movement of the probe along the pump shell, and play a certain positioning role in the assembly process, facilitating the quick assembly of the probe and the first mounting station. At the same time, the cross-sectional size of the second mounting station is smaller than that of the first mounting station, which can further limit the axial movement of the probe along the pump shell, greatly reducing the translation of the probe, thereby further improving the stable fixation of the probe and the first mounting station. Relatively, the fixed groove on the pump shell can also limit the translation of the cover plate when connected with the two ends of the cover plate in the circumferential direction of the pump shell, which is firm and more conducive to the assembly of the cover plate, and facilitates the user to inject glue into the mounting space through the glue injection hole.

[0046] 5、In the patent, the side of the cover plate away from the first mounting station is a convex arc surface, and the two end faces of the cover plate in the axial direction of the pump shell and the two end faces of the cover plate in the circumferential direction of the pump shell are all convex arc surfaces, which can not only prevent the cover plate from scratching the internal tissues of the human body, further improving the safety of the catheter pump, but also prevent the cover plate from scratching other parts, improving the service life and actual 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, thereby reducing the probability of thrombosis and hemolysis, and reducing the risk of surgery. In addition, the two end faces of the cover plate in the circumferential direction of the pump shell are provided as convex arc surfaces, which is also conducive to the adhesion of glue, so that the user can firmly fix the cover plate in the fixed groove. BRIEF DESCRIPTION OF DRAWINGS

[0047] The application will be further described in detail below in combination with the drawings and specific embodiments:

[0048] Figure 1 is a schematic diagram of the catheter pump provided by the application in a state;

[0049] Figure 2 is a schematic diagram of the first shell provided by the application;

[0050] Figure 3 is a schematic diagram of the second shell provided by the application;

[0051] Figure 4 is a schematic diagram of the sensing device provided by the application;

[0052] Figure 5 is an assembly diagram of the first shell, the cover plate and the sensing device provided by the application;

[0053] Figure 6 is a schematic diagram of the cover plate provided by the application in a state;

[0054] Figure 7is a schematic view of the cover plate in another state according to the present application;

[0055] Figure 8 is a schematic view of the conduit pump in another state according to the present application.

[0056] BRIEF DESCRIPTION OF DRAWINGS

[0057] 100, pump shell; 110, first shell; 111, first mounting station; 112, flow outlet; 113, support rod; 114, fixing groove; 115, flow inlet; 120, second shell; 121, through hole; 122, butt joint; 1221, screw thread; 130, second mounting station; 131, first part; 1311, overflow groove; 1312, glue storage groove; 132, second part; 1321, via hole;

[0058] 200, sensing device; 210, probe; 211, sensing area; 220, transmission cable;

[0059] 300, cover plate; 310, first avoiding hole; 320, glue injection hole; 330, mounting space; 340, overflow hole;

[0060] 400, glue layer;

[0061] 500, impeller. DETAILED DESCRIPTION

[0062] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, technologies, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can 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.

[0063] In order to describe the technical solutions of the embodiments of the present application or the prior art more clearly, the specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without any creative effort, and other embodiments can also be obtained.

[0064] In order to make the drawings simple, only the parts related to the present application are shown in the drawings, and they do not represent the actual structure of the product. In addition, in order to make the drawings simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown schematically, or only one of them is marked. In this document, "one" not only means "only one", but also means "more than one" situation.

[0065] It should also be further understood that the term "and / or" where used in the specification and in the claims, indicates that the associated listed items are one or both of the items and that the combination of the items is included.

[0066] In this document, the terms "mounting", "connected", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0067] In the embodiments shown in the drawings, the indications of directions such as up, down, left, right, front and back are used to explain the structure and movement of various components of the present application, which are not absolute but relative. When these components are in the position shown in the drawings, these descriptions are appropriate. If the position of these components changes, the indications of these directions also change accordingly.

[0068] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0069] According to a specific embodiment of the present application, see Figures 1 to 8 A catheter pump assembly, a catheter pump and a fixing method of a sensing device 200. Wherein the catheter pump assembly can specifically include a pump shell 100, a sensing device 200 and a cover plate 300, the pump shell 100 has a flow inlet 115 for fluid to flow in and a flow outlet 112 for fluid to flow out, and the outer wall of the pump shell 100 is provided with a first mounting station 111 near the flow outlet 112. The sensing device 200 has a probe, and the cover plate is arranged on the first mounting station 111 to form a mounting space 330 for accommodating the probe 210 with the first mounting station 111. At this time, the cover plate 300 is provided with a first avoiding hole 310 for avoiding the probe 210, and a glue injection hole 320 for injecting glue into the mounting space 330. Specifically, the sensing area 211 of the probe 210 for detecting pressure is located on the 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 with the fluid through the first avoiding hole 310 to detect the parameters of the fluid (such as fluid temperature, fluid flow rate or fluid pressure, etc.).

[0070] The conduit pump provided in the embodiment is preferably a micro axial conduit pump. By arranging the cover plate 300 to cover the first mounting station 111 on the outer side wall of the pump shell 100 close to the flow outlet 112, and forming a mounting space 330 for accommodating the probe 210 together with the first mounting station 111, the probe 210 of the sensing device 200 can be directly fixed on the outer side wall of the pump shell 100. At this time, the first avoiding hole 310 is arranged on the cover plate 300 to avoid the probe 210, so that the probe 210 can directly contact the fluid for detection, thereby improving the accuracy of the parameters detected by the sensing device 200, and further improving the physiological control effect of the conduit pump. Preferably, the sensing device 200 in the embodiment is a pressure sensing device, which facilitates the user to adjust the pressurization effect of the conduit pump on the fluid in real time according to the detected parameters, so as to avoid the occurrence of extreme phenomena such as suction and reflux, and improve the clinical treatment effect of heart failure patients.

[0071] It is worth noting that the probe 210 in the embodiment is arranged between the cover plate 300 and the first mounting station 111. On the one hand, the arrangement of the cover plate 300 reduces the impact of the fluid on the probe 210, which can not only avoid the loosening of the probe 210 due to the impact of the fluid, and ensure the stable fixation of the sensing device 200 and the pump shell 100, but also reduce the influence of the fluid impact on the accuracy of the probe 210, and further improve the use performance of the probe 210. On the other hand, when the conduit pump is implanted in the human body, the cover plate 300 is first subjected to external pressure rather than the probe 210, which can effectively prevent the probe 210 from being damaged by the human tissue, and reduce the physical damage to the probe 210 during the implantation process.

[0072] In addition, the first mounting station 111 arranged in the embodiment can reduce the radial size of the part of the probe 210 protruding from the pump shell 100, thereby reducing the radial size of the part of the cover plate 300 protruding from the pump shell 100, and further reducing the overall radial size of the conduit pump, which is beneficial to improve the passability of the conduit pump in the operation, avoid scratching the inside of the human body during implantation and withdrawal, and improve the safety of the conduit pump.

[0073] It is worth noting that, referring to Figure 1 and Figures 5 to 8 The cover plate 300 in the embodiment is further provided with a glue injection hole 320, and the user can directly inject glue into the glue injection hole 320 by using a syringe, so that the glue uniformly fills the mounting space 330, increases the contact area between the probe 210 and the glue, forms a glue layer 400, and thereby more stably fixes the probe 210 on the first mounting station 111.

[0074] The thickness of the glue injected into the mounting space 330 through the glue injection hole 320 in the radial direction of the pump shell 100 should not be greater than the thickness of the probe 210 in the radial direction of the pump shell 100.

[0075] In the prior art, the probe 210 of the medical sensing device 200 is small in size, for example, the probe 210 has a diameter of 0.33 mm and a length of 2.2 mm, and is difficult to be fixed, so that clamping and surface gluing are often used to fix the probe 210, but the above two fixing methods can easily affect the detection accuracy of the probe 210. In the embodiment, the mounting space 330 for injecting glue is formed between the cover plate 300 and the first mounting station 111, and the thickness of the glue injected into the mounting space 330 in the radial direction of the pump shell 100 is not more than the thickness of the probe 210 in the radial direction of the pump shell 100, so that the probe 210 can be fixed without covering the sensing area 211 of the probe 210, and the sensing area 211 of the probe 210 can be in contact with the blood as much as possible, thereby reducing the influence of external factors on the measurement accuracy of the probe 210.

[0076] In the embodiment, referring to Figure 1 and Figures 4 to 8 , the shape of the probe 210 is cylindrical, but in actual production, the shape of the probe 210 can also be a geometric body with a certain thickness or diameter, such as a triangular prism, a quadrangular prism, a sphere, etc., which are not limited herein and are within the protection scope of the present application. Correspondingly, in the embodiment, the glue injection holes 320 have a circular hole structure and are four in number and are uniformly and spacedly arranged around the first avoiding hole 310, but in actual production, the shape, number and distribution of the glue injection holes can be flexibly set according to actual conditions, which are not limited herein and are within the protection scope of the present application.

[0077] Specifically, referring to Figures 1 to 3 , the pump shell 100 includes a first shell 110 with an opening and a second shell 120 covering the opening. The first shell 110 and the second shell 120 jointly form a first chamber suitable for mounting an impeller 500; the second shell 120 is internally provided with a second chamber suitable for mounting a motor capable of driving the impeller 500 to rotate. The first shell 110 is provided with an inlet 115 at an end away from the second shell 120, and a plurality of outlet holes 112 are arranged around the central axis of the first shell 110.

[0078] At this time, referring to Figure 1 , Figure 5 and Figure 8 , the probe 210 is arranged on the outer sidewall of the first shell 110, and the plurality of outlet holes 112 are located on the side of the probe 210 facing the second shell 120. When the impeller 500 is driven to rotate by the motor, the fluid can be drawn into the first chamber through the inlet 115, and then the fluid can be discharged through the outlet holes 112. In this way, the probe 210 can detect the pressure of the fluid outside the outlet holes 112.

[0079] Preferably, the impeller 500 is located in the central region of the first chamber, and the flow inlet 115 is coaxially arranged with the impeller 500, so that the suction effect of the impeller 500 on the fluid can be effectively improved, and the use performance of the catheter pump is improved.

[0080] Specifically, when the catheter pump is implanted in the human body, under the rotating driving action of the impeller 500, the blood flows through the flow inlet 115 of the first shell 110, the impeller, and finally flows out from the flow outlet 112 into the arterial blood vessel. At this time, the sensor device 200 can obtain the aortic pressure of the human body by measuring the blood pressure outside the flow outlet 112, so as to monitor the physiological parameter changes of the cardiovascular system of the human body in real time, and change the rotating speed of the impeller 500 through the feedback of the pressure data, so as to realize the physiological control of the catheter pump auxiliary treatment of heart failure patients. While improving the aortic blood pulsatility, the occurrence of adverse events such as suction and reflux is avoided, which is beneficial to improve the clinical quality effect and life quality of heart failure patients.

[0081] Further, referring to Figure 1 , the end of the second shell 120 towards the first shell is in a conical structure, the small end of the conical structure is arranged towards the impeller 500, and the large end is located at the flow outlet 112, so as to guide the fluid in the first chamber to flow out from the flow outlet 112.

[0082] Further, referring to Figure 1 , Figure 2 , Figure 5 and Figure 8 , a strut 113 is formed between each two adjacent flow outlets 112, which improves the structural strength of the first shell 110, so that the catheter pump has good overall strength, improves the service life of the catheter pump, and also ensures the safety of the catheter pump.

[0083] In one embodiment, referring to Figures 1 to 3 and Figure 5 and Figure 8 , the outer side wall of the pump shell 100 is provided with a second mounting station 130 for fixing the transmission cable 220, and the second mounting station 130 is communicated with the first mounting station 111. Wherein, one side of the cover plate 300 towards the first mounting station 111 is a concave arc surface, and a gap is formed between the cover plate 300 and the outer side wall of the pump shell 100, which is suitable for connecting the transmission cable 220 to the probe 210 through the gap. At this time, the gap formed between the cover plate 300 and the outer side wall of the pump shell 100 also expands the size of the mounting space 330 to a certain extent, which is helpful for storing a large amount of glue, thereby increasing the contact area between the probe 210 and the glue, so that the probe 210 is more stably fixed between the first mounting station 111 and the cover plate 300.

[0084] Specifically, the pump shell 100 is in a cylindrical configuration, at this time, in order to form a gap between the arc surface of the cover plate 300 and the outer side wall of the pump shell 110, the radius of the arc surface of the cover plate 300 and the radius of the pump shell 100 should be inconsistent, that is, the arc of the outer side wall of the pump shell 100 should be flatter than the arc of the arc surface of the cover plate 300, and for this, the radius of the pump shell 100 should be larger than the radius of the arc surface of the cover plate 300.

[0085] Notably, the side of the cover plate 300 facing the first mounting station 111 is provided with a concave arc surface, which also plays a certain flow guiding role. In this way, when the user injects glue into the glue injection hole 320 using a syringe, the glue can flow along the arc surface of the cover plate 300 to the four edges of the mounting space 300, and then converge together, so that the glue can uniformly fill the mounting space 330 layer by layer until the appropriate position.

[0086] As a preferred, referring to Figures 5 to 8 , the cover plate 300 can be in an arc plate configuration, that is, the side of the cover plate 300 away from the first mounting station 111 is an outward convex arc surface similar to the arc surface profile of the side of the cover plate 300 facing the first mounting station 111, so as to avoid scratching the human body during implantation and removal of the catheter pump, thereby improving the safety and actual performance of the catheter pump. Notably, by improving the actual performance of the catheter pump, the blood compatibility of the catheter pump can be effectively improved, thereby reducing the probability of thrombosis and hemolysis and reducing the risk of surgery.

[0087] Further, the end of the cover plate 300 facing the flow inlet 115 is provided with a first sealing plate, which can block the side of the mounting space 330 facing the flow inlet 115, so as to prevent the fluid from washing the glue layer 400 and the probe 210 in the mounting space 330, and further strengthen the connection strength between the probe 210 and the first mounting station 111 and the cover plate 300.

[0088] Of course, in actual production, a second sealing plate can also be provided at the end of the cover plate 300 facing the transmission cable 220 to block the side of the mounting space 330 away from the flow inlet 115. However, at this time, the second sealing plate should be provided with a second avoiding hole corresponding to the transmission cable 220 for the transmission cable 220 to pass through.

[0089] Specifically, referring to Figure 2 and Figure 4, the profile of the first mounting station 111 and the probe 210 is matched, at this time, the distance between the two side walls of the first mounting station 111 in the axial direction of the pump shell 100 should be slightly larger than the length of the probe 210 in the axial direction of the pump shell 100, and the distance between the two side walls of the first mounting station 111 in the tangential direction of the pump shell 100 should be slightly larger than the length of the probe 210 in the tangential direction of the pump shell 100. In this way, the first mounting station 111 can not only limit the movement of the probe 210 in the axial direction of the pump shell 100, but also limit the movement of the probe 210 in the circumferential direction of the pump shell 100, and play a certain positioning role during assembly, so that the probe 210 of the sensing device 200 can be more easily placed in the first avoiding hole 311, and the assembly is convenient and fast.

[0090] At the same time, referring to Figure 1 , Figure 2 and Figure 4 , the cross-sectional size of the second mounting station 130 should also be smaller than that of the first mounting station 111, which cooperates with the first mounting station 111 to further limit the movement of the probe 210 in the axial direction of the pump shell, greatly reducing the translation of the probe 210, thereby further improving the stable fixation of the probe 210 and the first mounting station 111, reducing the probability of the cover plate 300 falling off under external force, and improving the actual performance and safety of the conduit pump.

[0091] Specifically, referring to Figure 2 and Figure 5 , the outer side wall of the pump shell 100 is located on both sides of the first mounting station 111 in the circumferential direction of the pump shell 100, and is provided with a fixed groove 114 for fixing the two ends of the cover plate 300 in the circumferential direction of the pump shell 100. At this time, the fixed groove 114 on the pump shell 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 shell 100, and the fixation is firm. Moreover, since the radius of the arc surface of the pump shell 100 is larger than the radius of the arc surface of the cover plate 300, when the two ends of the cover plate 300 in the circumferential direction of the pump shell 100 are fixed in the fixed groove 114, the cover plate 300 will arch on the outer side wall of the pump shell 100, forming a mounting space 330 with a large space volume to store glue. Therefore, limiting the translation of the cover plate 300 is also more conducive to the assembly of the cover plate 300, and facilitates the user to inject glue into the mounting space 330 through the glue injection hole 320.

[0092] Specifically, the two ends of the cover plate 300 in the circumferential direction of the pump shell 100 are fixed in the fixed groove 114 by gluing. Of course, in actual production, the two ends of the cover plate 300 in the circumferential direction of the pump shell 100 can also be fixed in the fixed groove 114 by welding. At this time, referring to Figure 1 , Figure 2 and Figures 5 to 8The cover plate 300 is fixedly connected with the fixed groove 114 by welding, and the welding is preferably laser welding.

[0093] Compared with the adhesive fixing, the welding fixing can make the fixing of the cover plate 300 and the fixed groove 114 more reliable and stable. In addition, in actual production, the welding fixing and the adhesive fixing can be combined and applied to the fixing connection of the cover plate 300 and the fixed groove 114, so as to further improve the stability of the cover plate 300 and the fixed groove 114.

[0094] Preferably, the two end faces of the cover plate 300 in the axial direction of the pump shell 100 and the two end faces of the cover plate 300 in the circumferential direction of the pump shell 100 are outwardly convex arc faces. In this way, the cover plate 300 can not only scratch the internal tissues of the human body, further improving the safety of the catheter pump, but also can not scratch other parts, improving the service life and actual performance of the catheter pump. In addition, the two end faces of the cover plate 300 in the axial direction of the pump shell 100 are outwardly convex arc faces, which is also conducive to the adhesion of the glue, so as to stably fix the cover plate 300 to the fixed groove 114.

[0095] Preferably, referring to Figures 2 to 5 The semicircular groove of the second mounting station 130 for fixing the transmission cable 220 can adapt to the profile of the transmission cable 220, and can play a better wire arrangement role, and the structure is reasonable. In addition, the setting of the second mounting station 130 can effectively reduce the size of the catheter pump in the radial direction, which is conducive to improving the passability of the catheter pump in the operation, reducing the radial size of the part of the transmission cable 220 protruding from the pump shell 100, and avoiding scratching the internal tissues of the human body during implantation and removal of the catheter pump, thereby improving the safety of the catheter pump.

[0096] Specifically, referring to Figures 1 to 3 The second mounting station 130 includes a first part 131 and a second part 132. The first part 131 is arranged on the first shell 110 and located on the support rod 113 corresponding to the first mounting station 111, and the second part 132 is arranged on the second shell 120. When the first shell 110 and the second shell 120 are fixedly connected, the first part 131 and the second part 132 are connected in communication to form the second mounting station 130.

[0097] Specifically, referring to Figure 3The second mounting station 130 is provided with a through hole 1321 through which the transmission cable 220 passes, so that the end of the transmission cable 220 away from the probe 210 enters the inside of the pump shell 100 and exits from the end of the pump shell 100 away from the flow inlet 115.

[0098] The through hole 1321 through which the transmission cable 220 passes is provided in the second shell 120 and is in communication with the second cavity inside the second shell 120, and the end of the transmission cable 220 away from the probe 210 enters the second cavity through the through hole 1321. The end of the second shell 120 away from the first shell 110 is provided with a through hole 121, and the end of the transmission cable 220 away from the probe 210 exits from the through hole 121 to electrically connect the probe 210 to an external display device, so that the parameters detected by the probe 210 can be acquired and displayed by the external display device.

[0099] In a specific embodiment, referring to Figure 3 The second shell 120 extends along the profile edge of the through hole 121 to the end away from the first shell 110 and is provided with a mating portion 122, and the outer side wall of the mating portion 122 is provided with threads 1221 for mating with an external device. As a preferred embodiment, the first mating portion and the through hole 121 are coaxial with the flow inlet and the impeller, which optimizes the overall structure of the conduit pump, is aesthetically pleasing and has strong practicability.

[0100] The transmission cable 220 is specifically fixed to the second mounting station 130 by gluing. As a preferred embodiment, the second mounting station 130 is provided with a glue storage groove 1312 for accommodating a large amount of glue to further stabilize the gluing of the transmission cable 220 and the second mounting station 130.

[0101] Specifically, referring to Figure 2 The cross section of the glue storage groove 1312 is a semicircular groove provided at the end of the first part 131 away from the first mounting station 111, and the cross section radius of the glue storage groove 1312 is much larger than the radius of the transmission cable 220, specifically 2-6 times the radius of the transmission cable 220, which strengthens the fixation of the transmission cable 220 by accommodating a large amount of glue.

[0102] Of course, in actual production, the glue storage groove 1312 can also be provided at the end of the second part 132 facing the first part 131, or at any other position of the second mounting station 130, or even multiple glue storage grooves 1312 can be provided uniformly on the second mounting station 130. This embodiment only lists some implementable solutions, which are not limited herein and are within the protection scope of the present application.

[0103] Preferably, referring to Figure 2The overflow groove 1311 is preferably a semicircular groove, and the cross-sectional radius of the overflow groove 1311 is greater than the radius of the transmission cable 220, specifically 2-6 times the radius of the transmission cable 220. In one aspect, the overflow groove 1311 can store excess glue in the installation space 330, and to a certain extent, plays a role in assisting in fixing the transmission cable 220; in another aspect, glue can also be injected into the overflow groove 1311 through the overflow hole 340, which can reinforce the fixing of the transmission cable 220, and increase the glue in the installation space 330 to reinforce the fixing of the probe 220.

[0104] In the embodiment, the purpose of predefining a certain distance between the overflow groove 1311 and the first installation station 111 is to prevent the overflow groove 1311 from being arranged next to the first installation station 111, which affects the limiting effect of the first installation station 111 and the second installation station 130 on the probe 220.

[0105] Referring to Figure 1 and Figure 8 The application further provides a conduit pump, which comprises an impeller 500, a motor for driving the impeller 500 to rotate, and the conduit pump assembly provided by any of the above embodiments. As mentioned in the above embodiments, the pump shell 100 comprises a first shell 110 having an opening and a second shell 120 covering the opening. The first shell 110 and the second shell 120 jointly form a first chamber, and the second shell 120 has a second chamber inside. The impeller 500 is arranged in the first chamber, and the motor is arranged in the second chamber. The first shell 110 has an inlet 115 at one end away from the second shell 120, and a plurality of outlets 112 arranged around the central axis of the first shell 110.

[0106] At this time, the probe 210 is arranged on the outer wall of the first shell 110, and the plurality of outlets 112 are located on the side of the probe 210 facing the second shell 120. When the impeller 500 rotates under the drive of the motor, the fluid can be drawn into the first chamber through the inlet 115, and then discharged through the outlets 112. In this way, the probe 210 can detect the fluid pressure outside the outlets 112.

[0107] Further, the application further provides a fixing method of a sensing device 200, which is suitable for the conduit pump provided by the above embodiments, and the specific steps are as follows:

[0108] First, the position of the probe 210 and the transmission cable 220 relative to the first installation station 111 and the second installation station 130 is arranged. Then, the transmission cable 220 is fixed to the second part 132 of the second installation station 130 and the via hole 1321 by potting. Next, the glue is applied to the storage tank 1312 and the first part 131 of the second installation station 130, and the fixing of the transmission cable is completed.

[0109] After that, a small amount of glue is applied to the first installation station 111, and the cover plate 300 is placed in the first installation station 111. Then the cover plate 300 is covered, and the cover plate 300 is fixed at the two ends of the pump shell 100 in the corresponding fixed groove 114. Among them, the fixing mode of the cover plate 300 and the fixed groove 114 has two kinds, which are glue and welding.

[0110] After the cover plate 300 is fixed, the user first injects glue into the installation space 330 through the glue injection hole 320 by using a syringe, and tries to ensure that the sensing area 211 of the probe 210 is not covered by the glue. Then, a proper amount of glue is injected into the overflow tank 1311 through the overflow hole 340 to reinforce the part of the transmission cable 220 close to the probe 210, so as to prevent the probe 210 and the transmission cable 220 from falling off.

[0111] In addition, in order to further stabilize and fix the cover plate 300, prevent the cover plate 300 and the probe 210 from loosening due to friction during implantation, and prevent the edges of the cover plate 300 from causing damage to the human body during implantation, glue needs to be applied to the two ends of the cover plate 300 in the axial direction of the pump shell 100, and to the two ends of the cover plate 300 in the circumferential direction of the pump shell 100. The cover plate 300 is more stably fixed on the pump shell 100 by the glue, and the edges of the cover plate 300 are smoothly transitioned. If the first sealing plate is provided at one end of the cover plate 300 facing the inlet 115, and / or the second sealing plate is provided at one end of the cover plate 300 facing the transmission cable 220, then glue should also be applied to the two ends of the first sealing plate and / or the second sealing plate in the axial direction of the pump shell 100 and in the circumferential direction of the pump shell 100, so that the edges of the first sealing plate and / or the second sealing plate are smoothly transitioned.

[0112] Finally, the above components with glue are placed in a temperature control box for solidification, realizing the integration of the sensing device 200 on the pump shell 100.

[0113] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0114] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present application, and it should be pointed out that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A conduit pump assembly, characterized by, The catheter pump assembly comprises: a pump shell having a fluid inlet and a fluid outlet, and a first mounting site provided on the outer wall of the pump shell near the fluid outlet; a sensor device having a probe; a cover plate covering the first mounting site and forming a mounting space with the first mounting site for accommodating the probe; the cover plate is provided with a first avoiding hole for avoiding the probe, the sensing area of the probe for detecting pressure is located on the side of the probe away from the first mounting site, the first avoiding hole allows the sensing area to be in contact with the fluid, and the cover plate is provided with a glue injection hole for injecting glue into the mounting space; the thickness of the glue injected into the mounting space through the glue injection hole in the radial direction of the pump shell is not greater than the thickness of the probe in the radial direction of the pump shell.

2. The catheter pump assembly according to claim 1, wherein the pump shell is in a cylindrical structure, and the side of the cover plate facing the first mounting site is a concave arc surface; the radius of the pump shell is greater than the radius of the arc surface of the cover plate.

3. The catheter pump assembly according to claim 1, wherein an end of the probe away from the fluid inlet is connected with a transmission cable, and the transmission cable is used to connect an external display device; the outer wall of the pump shell is provided with a second mounting site for fixing the transmission cable, and the second mounting site is connected with the first mounting site; wherein the side of the cover plate facing the first mounting site is a concave arc surface, and a gap is formed between the arc surface and the outer wall of the pump shell, which is suitable for connecting the transmission cable to the probe through the gap.

4. The catheter pump assembly according to claim 3, wherein the first mounting site and the profile of the probe are matched, and the cross-sectional size of the second mounting site is smaller than that of the first mounting site, so as to limit the axial movement or the circumferential movement of the probe along the pump shell.

5. The catheter pump assembly according to claim 4, wherein the outer wall of the pump shell is provided with a fixing groove on both sides of the first mounting site in the circumferential direction of the pump shell, for fixing the two ends of the cover plate in the circumferential direction of the pump shell.

6. The catheter pump assembly according to claim 5, wherein the two ends of the cover plate in the circumferential direction of the pump shell are fixed in the fixing grooves by gluing, or the two ends of the cover plate in the circumferential direction of the pump shell are fixed in the fixing grooves by welding.

7. The catheter pump assembly according to claim 3, wherein the second mounting site is provided with an overflow groove, and a certain distance is preset between the overflow groove and the first mounting site; and the cover plate is provided with an overflow hole corresponding to the overflow groove; and / or the transmission cable is fixed in the second mounting site by gluing, and the second mounting site is provided with a glue storage groove for accommodating glue to stably fix the transmission cable and the second mounting site by gluing.

8. The catheter pump assembly according to claim 3, wherein The second installation station is away from one end of the first installation station, and is provided with a through hole through which the transmission cable passes, so that the transmission cable passes into the interior of the pump shell away from one end of the probe and passes out of the pump shell away from one end of the flow inlet; And / or The surface of the cover plate away from the first installation station is a convex circular surface, and the two end surfaces of the cover plate in the axial direction of the pump shell and the two end surfaces of the cover plate in the circumferential direction of the pump shell are all convex circular surfaces.

9. A conduit pump characterized by, Comprise: The impeller, the motor driving the rotation of the impeller, and the catheter pump assembly of any one of claims 1-8; The pump shell comprises a first shell body having an opening and a second shell body covering the opening; The first shell body and the second shell body jointly form a first chamber, and the second shell body is internally provided with a second chamber, the impeller is arranged in the first chamber, and the motor is arranged in the second chamber; Wherein, the first shell body is provided with the flow inlet away from one end of the second shell body, and the first shell body is provided with a plurality of flow outlets around the central axis thereof; the probe is arranged on the outer side wall of the first shell body, and the plurality of flow outlets are all located on the side of the probe facing the second shell body; The impeller, under the driving of the motor, draws fluid into the interior of the first chamber through the flow inlet, and then discharges the fluid through the flow outlet.

10. A fixing method of a sensing device, suitable for the catheter pump of claim 9, characterized in that, The probe is connected with a transmission cable away from one end of the flow inlet; and the outer side wall of the pump shell is provided with a second installation station for fixing the transmission cable, and the second installation station is communicated with the first installation station; The transmission cable is glued to the second installation station; The probe is placed in the first installation station; The cover plate is fixed on the outer side wall of the pump shell, so that the first avoiding hole is opposite to the probe; Glue is injected into the installation space through the glue injection hole, so that the probe and the first installation station are fixedly connected, and the thickness of the glue injected into the installation space in the radial direction of the pump shell does not exceed the thickness of the probe in the radial direction of the pump shell; The assembled pump shell, cover plate and sensing device are placed in a temperature control box to solidify the glue.

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