Blood pump device for ECMO

Abstract

The utility model discloses a blood pump device for ECMO, which comprises a pump lower cover, a pump upper cover is arranged at the upper end of the pump lower cover, the pump lower cover and the pump upper cover are mutually assembled to form a blood circulation chamber, an impeller component is arranged at one end, connected with the pump upper cover, of the pump lower cover, and the impeller component provides power through a driving structure. A liquid inlet channel is formed in the top of the pump upper cover, the inner surface of the liquid inlet channel is hollow and communicates with the pump upper cover, and a liquid inlet is formed in an opening in the top of the liquid inlet channel and used for blood entering. Blood enters the hollow part between the upper pump cover and the lower pump cover through the liquid inlet in the liquid inlet channel and is located at the upper end of the impeller component, then the multiple blade pieces in the rotating state move, the blood is thrown out through the liquid outlet channel, and therefore under the condition that the impeller component is at a low speed, an impeller cannot deflect and can rotate stably, and the blood circulation efficiency is improved. Therefore, the characteristic of stability under small flow is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of ECMO blood pumps, and in particular relates to a blood pump device used for ECMO. Background Art

[0002] Artificial membrane lung, also known as ECMO (extracorporeal membrane oxygenation), is an artificial heart-lung machine, mainly used for patients with critical heart and lung failure. It provides patients with continuous extracorporeal oxygenation and circulatory support, reduces the patient's cardiopulmonary burden, and buys medical staff more time for treatment.

[0003] In the ECMO systems currently on the market, the blood pumps used usually use magnetic drive to drive the pump impeller to rotate, thereby driving the blood flow of the entire ECMO system; however, this drive method, at low speeds, can easily cause the impeller to vibrate violently and affect the flow accuracy, i.e., it is unstable at low flows. However, clinically, a lower flow rate is required before ECMO withdrawal;

[0004] To this end, a blood pump device for ECMO is designed, which rotates smoothly at low speed or even ultra-low speed, so as to achieve the purpose of clinical low flow stability. Utility Model Content

[0005] The utility model aims to provide a blood pump device for ECMO, so as to solve the problem that the blood pump proposed in the background technology is prone to cause severe vibration of the impeller and affect the flow accuracy when the speed is low.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows: a blood pump device for ECMO, comprising a pump lower cover, a pump upper cover is arranged on the upper end of the pump lower cover, the pump lower cover and the pump upper cover are assembled with each other to form a blood circulation chamber, and an impeller component is arranged at one end where the pump lower cover and the pump upper cover are connected, and the impeller component is powered by a driving structure.

[0007] In a specific embodiment, a liquid inlet channel is provided on the top of the pump cover, the inner surface of the liquid inlet channel is hollow and interconnected with the pump cover, and the top opening of the liquid inlet channel is a liquid inlet for the entry of blood.

[0008] In a specific embodiment, one end of the upper cover surface of the pump is connected to a liquid outlet channel, and the liquid outlet channel is used for discharging blood.

[0009] In a specific embodiment, the bottom of the impeller component is equipped with an impeller lower cover, and the upper end of the impeller component is connected with a blade member.

[0010] In a specific implementation, a linkage shaft for power transmission is connected to the middle of the lower end of the impeller lower cover, and the bottom of the linkage shaft passes through the bottom of the pump lower cover.

[0011] In a specific embodiment, a sealing member is sleeved on the surface of the linkage shaft body, and a shaft connection member is movably sleeved on the surface of the linkage shaft body and located at the bottom of the sealing member.

[0012] In a specific implementation manner, a flexible coupling is installed at the bottom of the linkage shaft, a driving member is provided at the bottom end of the pump upper cover, and a transmission member is connected to the power output end of the driving member.

[0013] In a specific embodiment, in order to install the driving member, the outer end of the driving member is provided with a fixing sleeve, the inner surface of the fixing sleeve is hollow, and the top of the fixing sleeve is provided with a through hole, and a fastener is provided through the top of the fixing sleeve.

[0014] In a specific embodiment, the outer end of the fixing sheath is sleeved with a connecting cylinder.

[0015] The utility model provides a blood pump device for ECMO with the following advantages:

[0016] The blood pump device for ECMO is driven by a driving member, and can transmit power to the linkage shaft body through the transmission member under the action of the flexible coupling member, and the linkage shaft body and the impeller lower cover are arranged as an integral whole and are interconnected by a plurality of reinforcing ribs to realize the transmission of torque, and the linkage shaft body is stably rotated by a plurality of shaft connectors, and is sealed with the pump lower cover by a sealing member; blood enters the hollow part between the pump upper cover and the pump lower cover relative to each other through the liquid inlet on the liquid inlet channel, and is at the upper end of the impeller component, and then the plurality of blades in a rotating state move to throw the blood out through the liquid outlet channel, so that the impeller component cannot deflect at a low speed and can rotate smoothly, so as to achieve the characteristic of stability under small flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic cross-sectional view of the overall structure of the utility model;

[0019] Figure 2The utility model is a three-dimensional schematic diagram of the overall structure

[0020] Figure 3 This is a schematic diagram of the overall inclined explosion structure of the utility model;

[0021] Figure 4 It is a schematic diagram of the overall structure of the utility model in a front view and a cross-sectional view;

[0022] Figure 5 It is a schematic diagram of the overall exploded structure of the utility model;

[0023] Figure 6 This is a schematic diagram of the assembly structure of the impeller component of the utility model;

[0024] Figure 7 It is a three-dimensional exploded schematic diagram of the impeller component structure of the utility model;

[0025] Figure 8 It is a schematic diagram of the assembly of the fixed sleeve and the driving member structure of the utility model.

[0026] Description of the markings in the figure:

[0027] 100, pump lower cover; 110, pump upper cover; 120, liquid inlet channel; 121, liquid inlet; 130, liquid outlet channel;

[0028] 200, impeller component; 201, impeller lower cover; 202, blade component; 203, linkage shaft body; 210, sealing component; 220, shaft connection component; 230, flexible coupling component;

[0029] 300, fixed sheath; 301, through hole; 302, fastener; 310, connecting cylinder;

[0030] 400, driving member; 410, transmission member. DETAILED DESCRIPTION

[0031] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0032] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0035] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0036] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of a blood pump device for ECMO of the present invention in conjunction with the accompanying drawings.

[0037] like Figure 1-Figure 5 As shown, a blood pump device for ECMO of the utility model comprises a pump lower cover 100, and a pump upper cover 110 for cooperating therewith is arranged at the upper end of the pump lower cover 100, and the pump lower cover 100 and the pump upper cover 110 are assembled with each other to form a blood circulation chamber; a liquid inlet channel 120 is arranged at the top of the pump upper cover 110, and the inner surface of the liquid inlet channel 120 is hollow and communicated with the pump upper cover 110, and the top opening of the liquid inlet channel 120 is a liquid inlet 121 for blood to enter; wherein the liquid inlet channel 120 is conical, and a reinforcing blade is connected to the lower end of the surface of the liquid inlet channel 120, and the bottom end of the reinforcing blade is connected to the surface of the pump upper cover 110, so as to increase the connection strength between the pump upper cover 110 and the liquid inlet channel 120 by reinforcing the blade;

[0038] In order to allow the blood to flow out of the chamber between the pump upper cover 110 and the pump upper cover 110 , one end of the surface of the pump upper cover 110 is connected to a liquid outlet channel 130 , and the liquid outlet channel 130 is used for discharging blood.

[0039] like Figure 1-Figure 7 As shown, an impeller component 200 is provided at one end where the pump lower cover 100 and the pump upper cover 110 are connected, and the impeller component 200 is powered by a driving structure; an impeller lower cover 201 is assembled at the bottom of the impeller component 200, and a blade member 202 is connected to the upper end of the impeller component 200, wherein the blade member 202 is a plurality of top ends connected to the impeller component 200, and the plurality of blade members 202 are in a symmetrically screwed state;

[0040] The middle part of the lower end of the impeller lower cover 201 is connected with a linkage shaft 203 for power transmission, and the bottom of the linkage shaft 203 penetrates the bottom of the pump lower cover 100. The impeller component 200 is preferably made of stainless steel. At the same time, the material of the impeller component 200 can also be a ceramic material. The actual material of the impeller component 200 should be selected according to actual needs.

[0041] As a further optimization of this solution, in order to enhance the connection strength between the impeller lower cover 201 and the linkage shaft 203, the impeller lower cover 201 and the linkage shaft 203 are connected at one end thereof by a plurality of symmetrically arranged reinforcing ribs, so as to increase the connection strength between the two, and the reinforcing ribs are preferably three and symmetrically arranged;

[0042] The surface of the linkage shaft 203 is sleeved with a seal 210 for sealing the connection between the linkage shaft 203 and the pump lower cover 100, and the surface of the linkage shaft 203 and the bottom of the seal 210 is movably sleeved with a shaft connection 220. The shaft connection 220 is preferably in three groups, and one end of the shaft connection 220 is embedded in the inner surface of the pump lower cover 100 to increase the stability of the linkage shaft 203 during transmission. A flexible coupling 230 is installed at the bottom of the linkage shaft 203 to drive the impeller component 200.

[0043] like Figure 1 and Figure 3-Figure 5 As shown, a driving member 400 is provided at the bottom end of the pump upper cover 110, and a transmission member 410 is connected to the power output end of the driving member 400. The top end of the transmission member 410 is connected to the flexible coupling member 230, so that the transmission member 410 and the linkage shaft 203 are connected through 320, thereby realizing the transmission of torque.

[0044] like Figure 1-Figure 8As shown, in order to install the driving member 400, the outer end of the driving member 400 is sleeved with a fixing sleeve 300, the inner surface of the fixing sleeve 300 is hollow, and the top of the fixing sleeve 300 is provided with a through hole 301 for leading out the transmission member 410, and the top of the fixing sleeve 300 is penetrated by a fastener 302, and the bottom of the fastener 302 is threadedly fastened with the upper end of the driving member 400, so that the driving member 400 is installed on the top of the inner cavity of the fixing sleeve 300 through the fastener 302; and the driving member 400 is assembled with the pump lower cover 100, and the outer end of the fixing sleeve 300 is sleeved with a connecting cylinder 310, and the top of the connecting cylinder 310 is connected to the bottom of the pump lower cover 100, and the inner cavities of the two are connected to each other.

[0045] A blood pump device for ECMO has a working principle: driven by a driving member 400, under the action of a flexible coupling member 230, power can be transmitted to a linkage shaft body 203 through a transmission member 410, and the linkage shaft body 203 and an impeller lower cover 201 are integrally arranged and interconnected by a plurality of reinforcing ribs to achieve torque transmission, and the linkage shaft body 203 is stably rotated by a plurality of shaft connectors 220, and is sealed with a pump lower cover 100 through a sealing member 210;

[0046] The blood enters the hollow portion between the pump upper cover 110 and the pump lower cover 100 through the liquid inlet 121 on the liquid inlet channel 120 and is located at the upper end of the impeller component 200. Then, the blood is thrown out through the liquid outlet channel 130 by the movement of the plurality of rotating blades 202. In this way, the impeller component 200 cannot deflect at a low speed and can rotate smoothly, thereby achieving the characteristic of stability at a small flow rate.

[0047] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A blood pump device for ECMO, characterized in that: include A pump lower cover (100) is provided at the upper end of the pump lower cover (100), and the pump upper cover (110) and the pump lower cover (100) are assembled with each other to form a blood circulation chamber, and an impeller component (200) is provided at one end where the pump lower cover (100) and the pump upper cover (110) are connected, and the impeller component (200) is powered by a driving structure.

2. The blood pump device for ECMO according to claim 1, characterized in that: A liquid inlet channel (120) is provided on the top of the pump upper cover (110); the inner surface of the liquid inlet channel (120) is hollow and communicates with the pump upper cover (110); the top opening of the liquid inlet channel (120) is a liquid inlet (121) for the entry of blood.

3. The blood pump device for ECMO according to claim 2, characterized in that: One end of the surface of the pump upper cover (110) is connected to a liquid outlet channel (130), and the liquid outlet channel (130) is used for discharging blood.

4. The blood pump device for ECMO according to claim 3, characterized in that: The bottom of the impeller component (200) is equipped with an impeller lower cover (201), and the upper end of the impeller component (200) is connected with a blade member (202).

5. The blood pump device for ECMO according to claim 4, characterized in that: A linkage shaft (203) for power transmission is connected to the middle of the lower end of the impeller lower cover (201), and the bottom of the linkage shaft (203) penetrates to the bottom of the pump lower cover (100).

6. The blood pump device for ECMO according to claim 5, characterized in that: The surface of the linkage shaft body (203) is sleeved with a sealing member (210), and the surface of the linkage shaft body (203) and the bottom of the sealing member (210) are movably sleeved with a shaft connection member (220).

7. The blood pump device for ECMO according to claim 6, characterized in that: A flexible coupling member (230) is installed at the bottom of the linkage shaft (203), a driving member (400) is arranged at the bottom end of the pump upper cover (110), and a transmission member (410) is connected to the power output end of the driving member (400).

8. The blood pump device for ECMO according to claim 7, characterized in that: In order to install the driving member (400), a fixing sleeve (300) is sleeved on the outer end of the driving member (400), the inner surface of the fixing sleeve (300) is hollow, and a through hole (301) is opened at the top of the fixing sleeve (300), and a fastener (302) is provided through the top of the fixing sleeve (300).

9. The blood pump device for ECMO according to claim 8, characterized in that: The outer end of the fixed sheath (300) is sleeved with a connecting cylinder (310).

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