CN113476738B

CN113476738B - Blood pump with detection device

Info

Publication number: CN113476738B
Application number: CN202110632803.9A
Authority: CN
Inventors: 魏润杰; 高琪
Original assignee: Zhejiang Diyuan Medical Equipment Co ltd
Current assignee: Zhejiang Diyuan Medical Equipment Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2022-11-08
Anticipated expiration: 2041-06-07
Also published as: CN113476738A

Abstract

The embodiment of the application discloses blood pump with detection device, blood pump includes: the shell is provided with an accommodating cavity and a mounting hole, and the mounting hole is communicated with the accommodating cavity; the impeller is rotatably arranged in the accommodating cavity; the driving device is used for driving the impeller to rotate in the accommodating cavity; and the detection device is at least partially deformable, is inserted into the mounting hole and is used for detecting the parameters of the blood in the accommodating cavity. The blood pump of this application implementation detects through detection device the working condition of blood pump can be known to the parameter of holding the blood of intracavity, through inserting detection device and locate can reduce detection device's the space that sets up in the mounting hole, because at least part of detection device can warp, can reduce the degree of difficulty that detection device installed in the mounting hole.

Description

Blood pump with detection device

Technical Field

The present application relates to a blood pump with a detection device.

Background

A blood pump is an extracorporeal assist device that provides temporary cardiac maintenance to a patient. The blood pump is placed percutaneously in a blood vessel and the drive means simulates the blood supply function of the heart in order to maintain or replace the pumping function in the heart, maintaining the normal vital signs of the patient. Blood pumps pass through heart valves during operation, supplying blood directly to the heart, and therefore blood parameters within the blood pump are very important. Currently, detecting blood parameters within a blood pump is becoming an ongoing problem.

Disclosure of Invention

In view of this, the present disclosure provides a blood pump with a detection device.

In order to achieve the purpose, the technical scheme of the application is realized as follows:

the embodiment of the present application provides a blood pump with detection device, blood pump includes: the shell is provided with an accommodating cavity and a mounting hole, and the mounting hole is communicated with the accommodating cavity;

the impeller is rotatably arranged in the accommodating cavity;

the driving device is used for driving the impeller to rotate in the accommodating cavity;

and the detection device is at least partially deformable, is inserted into the mounting hole and is used for detecting the parameters of the blood in the accommodating cavity.

In some optional implementations, the detecting means includes:

the base body is at least partially deformable and is at least partially inserted into the mounting hole;

at least one detection piece is arranged in the seat body and used for detecting parameters of the blood in the accommodating cavity.

In some optional implementations, the detecting means includes:

the first detection piece is arranged on the seat body and used for detecting the pressure of the blood;

the second detection piece is arranged on the seat body and used for detecting the flow of the blood;

the third detection piece is arranged on the seat body and is used for detecting the temperature of the blood;

wherein the first detecting member, the second detecting member and the third detecting member are provided at intervals in a circumferential direction of the housing.

In some optional implementations, the detecting device further includes:

the flexible piece is arranged on the side, facing the accommodating cavity, of the base body and is in contact with the at least one detection piece.

In some optional implementations, the housing comprises:

the base part can deform, is inserted into the mounting hole and is provided with a through groove;

the at least one detection piece is arranged in the through groove;

the flexible piece is blocked at the through groove and is positioned on the side, facing the accommodating cavity, of the base part;

and a cover portion connected to the base portion and covering the at least one detection member.

In some alternative implementations, the at least one sensing element is configured to sense at least one of a flow rate, a pressure, and a temperature of the blood.

In some optional implementations, the blood pump further comprises:

an inlet disposed at a first end of the housing;

an outlet disposed at a second end of the housing;

two sets of detection devices; the first group of detection devices in the two groups of detection devices are arranged at the inlet and are used for detecting a first pressure of blood at the inlet; a second set of the two detection devices is arranged at the outlet and is used for detecting a second pressure of the blood at the outlet;

and the controller is electrically connected with the two detection devices respectively and determines a first flow rate of the blood based on the pressure difference of the second pressure minus the first pressure.

In some alternative implementations, the detection device is further configured to detect a second flow rate of the blood;

the controller is further configured to calculate a mean flow rate of the blood based on the first flow rate and the second flow rate.

In some optional implementations, the first set of detection means comprises: a first detecting means; the second set of detection means comprises: a second detecting means; the first detection device and the second detection device are symmetrically arranged in the circumferential direction of the shell; or the like, or, alternatively,

the first set of detection means comprises: the two first detection devices are symmetrically arranged along the circumferential direction of the shell; the second set of detection means comprises: the two second detection devices are symmetrically arranged along the circumferential direction of the shell; the two first detection devices and the two second detection devices are uniformly arranged in the circumferential direction of the shell.

In some optional implementations, the housing further has:

the at least two connecting parts are positioned at the second end of the shell, are connected with the driving device and are provided with the mounting holes; an outlet is formed between two adjacent connecting parts of the at least two connecting parts;

the detection device is used for detecting the parameters of the blood at the outlet.

In some optional implementations, the blood pump further comprises:

a first connection line; the first end of the first connecting wire is arranged in the driving device, and the second end of the first connecting wire extends out of the driving device;

a second connecting line; the first end of the second connecting wire is electrically connected with the detection device, and the second end of the second connecting wire is arranged in the driving device in a penetrating way and is electrically connected with the first connecting wire;

the detection device and at least one of the two connecting parts meet an overlapping condition in the axial direction of the shell, and the middle part of the second connecting line is attached to the surface of the at least one connecting part.

The blood pump in the embodiment of the present application includes: the shell is provided with an accommodating cavity and a mounting hole, and the mounting hole is communicated with the accommodating cavity; the impeller is rotatably arranged in the accommodating cavity; the driving device is used for driving the impeller to rotate in the accommodating cavity; and the detection device is at least partially deformable, is inserted into the mounting hole and is used for detecting the parameters of the blood in the accommodating cavity. The blood pump of this application implementation detects through detection device the working condition of blood pump can be known to the parameter of holding the blood of intracavity, through inserting detection device and locate can reduce detection device's the space that sets up in the mounting hole, because at least part of detection device can warp, can reduce the degree of difficulty that detection device installed in the mounting hole.

Drawings

Fig. 1 is a schematic view of an alternative configuration of a blood pump with a detection device according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of an alternative embodiment of a detection device of a blood pump with a detection device according to the present disclosure;

FIG. 3 is a schematic view of an alternative configuration of a blood pump with a detection device according to an embodiment of the present disclosure;

FIG. 4 is an exploded view of the blood pump with the detection device corresponding to FIG. 3;

FIG. 5 is an exploded view of the blood pump with the detection device corresponding to FIG. 3;

FIG. 6 is a schematic view of another perspective of the blood pump with the detection device corresponding to FIG. 3;

FIG. 7 is a schematic view of an alternative embodiment of a blood pump with a detection device according to the present disclosure;

FIG. 8 is an exploded view of the blood pump with the detection device corresponding to FIG. 7;

FIG. 9 is a schematic view of another perspective of the blood pump with the detection device corresponding to FIG. 7;

FIG. 10 is a schematic view of an alternative configuration of a first detecting member of a blood pump having a detecting device according to an embodiment of the present disclosure;

FIG. 11 is a schematic view of an alternative structure of a second detecting member of the blood pump with a detecting device according to the embodiment of the present application;

fig. 12 is an alternative structural diagram of a third detecting element of a blood pump with a detecting device provided in the embodiment of the present application.

Reference numerals: 101. an outlet; 102. an inlet; 103. an opening; 110. a housing; 111. an accommodating chamber; 112. a connecting portion; 113. mounting holes; 120. an impeller; 130. a drive device; 140. a detection device; 141. a first detecting member; 1411. a positive plate; 1412. a negative plate; 1413. a dielectric layer; 142. a second detecting member; 1421. a first temperature transmitter chip structure; 1422. a second temperature transmitter chip structure; 1423. a heat source; 143. a third detecting member; 1431. a temperature sensitive material layer; 144. a base portion; 145. a flexible member; 146. a cover portion; 147. a first set of detection devices; 148. a second set of detection devices; 151. a first connection line; 152. and a second connecting line.

Detailed Description

Various combinations of the specific features in the embodiments described in the detailed description may be made without contradiction, for example, different embodiments may be formed by different combinations of the specific features, and in order to avoid unnecessary repetition, various possible combinations of the specific features in the present application will not be described separately.

In the description of the embodiments of the present application, it should be noted that, unless otherwise specified and limited, the term "connected" should be interpreted broadly, for example, as an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

It should be noted that the terms "first \ second \ third" referred to in the embodiments of the present application are only used for distinguishing similar objects, and do not represent a specific ordering for the objects, and it should be understood that "first \ second \ third" may interchange a specific order or sequence when allowed. It should be understood that "first \ second \ third" distinct objects may be interchanged under appropriate circumstances such that the embodiments of the application described herein may be implemented in an order other than those illustrated or described herein.

As shown in fig. 1, the blood pump includes: a housing 110, an impeller 120, a drive means 130 and a detection means 140. The housing 110 has an accommodation chamber 111 and a mounting hole 113, and the mounting hole 113 communicates with the accommodation chamber 111. The impeller 120 is rotatably disposed in the receiving chamber 111. The driving device 130 is used for driving the impeller 120 to rotate in the accommodating cavity 111. The detection device 140 is at least partially deformable, the detection device 140 is inserted into the mounting hole 113, and the detection device 140 is used for detecting parameters of blood in the accommodating cavity 111; the working condition of the blood pump can be known by detecting the parameters of the blood in the accommodating cavity 111 through the detection device 140, the arrangement space of the detection device 140 can be reduced by inserting the detection device 140 into the mounting hole 113, and the difficulty of installing the detection device 140 in the mounting hole 113 can be reduced because at least part of the detection device 140 can be deformed.

In the embodiment of the present application, the structure of the housing 110 is not limited as long as the housing 110 has the accommodating chamber 111 so that blood can flow in the accommodating chamber 111. For example, the housing 110 has a cylindrical structure.

Here, the shape of the receiving cavity 111 is not limited. For example, the receiving cavity 111 may have a cylindrical structure.

Here, the sectional shape of the mounting hole 113 is not limited. For example, the sectional shape of the mounting hole 113 may be rectangular or circular. The position where the mounting hole 113 is provided is not limited. For example, the mounting hole 113 may be disposed at a first end of the housing 110, at a second end of the housing 110, or at a middle portion of the housing 110.

Here, the housing 110 may have an opening 103, and the opening 103 communicates with the receiving chamber 111 such that at least a portion of the impeller 120 is rotatably disposed in the receiving chamber 111 through the opening 103. For example, the housing 110 has a cylindrical structure, and a port at the second end of the housing 110 forms an opening.

Here, the housing 110 may further have an inlet 102, and the inlet 102 communicates with the accommodating chamber 111 so that blood can enter the accommodating chamber 111 from the inlet 102. For example, the inlet 102 may be disposed at a first end of the housing 110. As an example, the housing 110 is a cylindrical structure, and a port at a first end of the housing 110 forms the inlet 102.

In the present embodiment, the outlet 101 may be provided at both ends of the housing 110. For example, the housing 110 has a cylindrical structure, and the outlet 101 is provided on a circumferential wall of the second end of the housing 110.

As an example, as shown in fig. 1, the housing 110 may further have: at least two connecting portions 112. At least two connecting portions 112 are located at the second end of the housing 110, and at least two connecting portions 112 are connected with the driving device 130; the outlet 101 is formed between two adjacent connecting portions 112 of the at least two connecting portions 112. Here, at least two connection portions 112 may have mounting holes 113, and the detection means 140 may be used to detect a parameter of blood at the outlet 101.

Here, the shape of the connection portion 112 is not limited. For example, the connection portion 112 may have a strip structure.

Here, the number of the connection portions 112 is not limited. For example, as shown in fig. 4 and 5, the number of the connection portions 112 is four.

Here, the blood pump may further include: first connection lines 151 and second connection lines 152; a first end of the first connecting wire 151 is disposed inside the driving device 130, and a second end of the first connecting wire 151 extends out of the driving device 130; a first end of the second connection line 152 is electrically connected to the detection device 140, and a second end of the second connection line 152 is disposed in the driving device 130 and electrically connected to the first connection line 151; the detecting device 140 and at least one connecting portion 112 of the at least two connecting portions 112 satisfy an overlapping condition in the axial direction of the housing 110, and a middle portion of the second connecting wire 152 is attached to a surface of the at least one connecting portion 112, so that the second connecting wire 152 is directly electrically connected to the first connecting wire 151 through the connecting portion 112 in the axial direction of the housing 110, and the arrangement length of the second connecting wire 152 is reduced.

A second end of the first connection wire 151 extends out of the driving device 130 to be electrically connected with a controller of the blood pump.

Overlapping conditions refer to overlapping or substantially overlapping.

Of course, the detecting device 140 and at least one connecting portion 112 of the at least two connecting portions 112 may not satisfy the overlapping condition in the axial direction of the housing 110; that is, the first connecting lines 151 may also be disposed in a bent shape.

In the embodiment of the present application, the structure of the impeller 120 is not limited as long as the impeller 120 can rotate to push the blood to flow.

In the embodiment of the present application, the structure of the driving device 130 is not limited as long as the driving device 130 can drive the impeller 120 to rotate in the accommodating cavity 111. For example, the driving device 130 may include a motor, and an output shaft of the motor is connected to the impeller 120, so that the driving device 130 drives the impeller 120 to rotate in the accommodating cavity 111 through the output shaft.

Here, the driving means 130 is connected to the impeller 120 through an output shaft such that the impeller 120 is rotatably disposed in the receiving chamber 111.

In the embodiment of the present application, the structure of the detection device 140 is not limited as long as the detection device 140 can detect the parameter of the blood in the accommodating cavity 111.

For example, the detection device 140 may include a pressure sensor so as to detect the pressure of the blood in the accommodating chamber 111 through the detection device 140. For another example, the detection device 140 may include a flow sensor so as to detect the flow of blood in the accommodating chamber 111 through the detection device 140. As another example, the detection device 140 may include a temperature sensor so as to detect the temperature of the blood in the accommodating chamber 111 through the detection device 140.

Here, at least part of the detection device 140 may be deformable, so that the entire structure of the detection device 140 may be deformable, or part of the structure of the detection device 140 may be deformable.

Here, the detection device 140 is inserted into the mounting hole 113 to reduce the installation space of the detection device 140, and the first surface of the detection device 140 and the second surface of the housing 110 may satisfy an alignment condition so as to prevent flowing blood from striking the detection device 140; the first surface of the detection device 140 refers to the surface facing into the accommodating cavity 111; the second surface of the housing 110 refers to a surface where the mounting hole 113 is located to form the receiving cavity 111; at the same time, blood can also be prevented from depositing at the detection device 140. The alignment condition may be alignment or substantial alignment.

The shape of the first surface of the detection device 140 may match the shape of the second surface of the housing 110. For example, the first surface of the detecting device 140 is an arc surface, the second surface of the housing 110 is an arc surface, and the arcs of the first surface of the detecting device 140 and the second surface of the housing 110 are the same.

Of course, the first surface of the detecting device 140 may be recessed into the second surface of the housing 110, that is, the first surface of the detecting device 140 is recessed into the mounting hole 113; the first surface of the detecting device 140 may also protrude from the second surface of the housing 110, that is, the first surface of the detecting device 140 protrudes from the mounting hole 113.

Here, the detecting unit 140 may be connected to the housing 110 by an adhesive to secure the connection strength between the detecting unit 140 and the housing 110. Of course, the detecting device 140 can be fixedly connected to the housing 110 in other manners.

Here, the blood parameter is not limited. For example, the parameter of the blood may include at least one of flow rate, pressure, and temperature.

In some optional implementations of the embodiment of the present application, the detecting device 140 may include: the pedestal and at least one detection piece. At least part of the seat body can deform, and at least part of the seat body is inserted into the mounting hole 113; at least one detecting element is arranged in the seat body, and the at least one detecting element is used for detecting parameters of blood in the accommodating cavity 111; so that a parameter of the blood inside said containing cavity 111 can be detected by at least one detecting member.

In this embodiment, the seat body may be a deformable structure as a whole, or may be a deformable structure as a partial structure.

In this embodiment, the shape of the seat is not limited. For example, the seat body may have a bent plate-shaped structure or a straight plate-shaped structure.

In this embodiment, the structure of the detecting member is not limited. For example, the detecting member may be a chip capable of detecting a parameter of blood. For another example, the detecting member may be a sensor capable of detecting a parameter of blood.

The number of the detecting members may be one, and may be plural. When the number of the detecting members is plural, the plural detecting members may measure different parameters of the blood or may measure the same parameter of the blood.

As an example, the at least one detection member may be adapted to detect at least one of a flow rate, a pressure and a temperature of the blood.

In this implementation, the detecting device 140 may further include: the flexible piece 145 is arranged on the side, facing the accommodating cavity 111, of the holder body, and the flexible piece 145 is in contact with the at least one detection piece; so that at least one detecting member detects a parameter of the blood in the accommodating chamber 111 through the flexible member 145; here, the detecting member may be a chip structure.

Of course, the detecting device 140 may not be provided with the flexible member 145, and at least one detecting member may directly detect the parameter of the blood in the accommodating cavity 111. Here, the detecting member may be a sensor.

Here, the structure of the flexible member 145 is not limited as long as the at least one sensing member can sense a parameter of the blood in the accommodating chamber 111 through the flexible member 145. For example, the flexible member 145 may be a film-like structure.

The outer surface of the flexible member 145 forms a first surface of the detection device 140, and when flowing blood exists in the accommodating cavity 111, the flowing blood contacts with the outer surface of the flexible member 145, so that impact damage of the detection device 140 to the blood can be reduced; meanwhile, since the flowing blood has a set pressure, the flexible member 145 can be deformed to match the shape of the second surface of the housing 110 based on the pressure of the flowing blood, and the deposition of blood on the surface of the flexible member 145 can be further reduced.

In this implementation, the implementation of the at least one detection member disposed within the seat is not limited.

For example, as shown in fig. 2, the seat body may include: base portion 144, flexible member 145 and cover portion 146. The base portion 144 is deformable, the base portion 144 is inserted into the mounting hole 113, and the base portion 144 has a through groove; the at least one detection piece is arranged in the through groove; the flexible part 145 is blocked at the through slot, and the flexible part 145 is positioned at the side of the base part 144 facing the accommodating cavity 111; a cover portion 146 is connected to the base portion 144, the cover portion 146 is blocked at the through slot, and the cover portion 146 is located on the side of the base portion 144 facing away from the accommodating cavity 111; to support at least one sensing element by base portion 144; meanwhile, since the base portion 144 can be deformed, the difficulty of inserting the base portion 144 into the mounting hole 113 can be reduced.

In this example, the structure of the base portion 144 is not limited as long as the base portion 144 is deformable. For example, the base portion 144 may have a bent plate-like structure or a straight plate-like structure.

Here, the material of the base portion 144 is not limited. For example, the material of the base portion 144 may be a composite material.

Here, the shape of the through groove is not limited as long as it is convenient to dispose the at least one detection member in the through groove.

In this example, the structure of the cover 146 is not limited. For example, the cover 146 may have a bent plate-like structure or a straight plate-like structure.

Here, the lid portion 146 may be deformable or rigid.

Here, the cover 146 and the flexible member 145 can seal the at least one detection member from the channel of the base 144, preventing blood from entering the channel. Here, at least one of the sensing members may be a chip structure in order to simplify the structure of the sensing device 140.

Of course, in other examples, the base portion 144 may be provided only, and in this case, the base portion 144 may have a groove, and the flexible member 145 is blocked at the groove of the groove, so as to simplify the structure of the base body.

As an example, as shown in fig. 2, the detecting device 140 may include: a first detecting member 141, a second detecting member 142, and a third detecting member 143. The first detecting element 141 is disposed on the seat, and the first detecting element 141 is used for detecting the pressure of the blood; the second detecting element 142 is disposed on the seat, and the second detecting element 142 is used for detecting the flow of the blood; the third detecting element 143 is disposed on the seat, and the third detecting element 143 is configured to detect the temperature of the blood; so that the pressure, flow rate and temperature of blood can be detected by the same detection device 140, the number of detection devices 140 is reduced, the space for arranging the detection devices 140 is reduced, and the structure of the detection devices 140 is simplified.

In the first example, the structure of the first detecting member 141 is not limited as long as the first detecting member 141 can detect the pressure of the blood. For example, the first detection member 141 may be a resistance type pressure sensor. For another example, the first detecting element 141 may be a chip structure of the resistance type pressure sensor, that is, the first detecting element 141 does not include a housing, and in this case, the seat body forms a housing of the chip structure of the resistance type pressure sensor, and the seat body is used for protecting the chip structure of the resistance type pressure sensor.

As an example, as shown in fig. 10, the first detection member 141 is a chip structure of a capacitance type pressure sensor. The first sensing piece 141 includes a positive electrode plate 1411, a negative electrode plate 1412, and a dielectric layer 1413; a dielectric layer 1413 is disposed between the positive plate 1411 and the negative plate 1412.

When blood flows through the accommodating chamber 111 in the direction of the graph a, the blood generates a pressure in the direction of the graph B on the first detection element 141, and the positive electrode and the negative electrode are brought close to the dielectric layer 1413 by the pressure of the blood, respectively, so that the capacitance signal changes, and the change in pressure can be detected based on the change in the capacitance signal.

The capacitance value C of the first detecting element 141 is:

C＝e ₀ ∈ _r A/d

wherein e is ₀ Is a vacuum dielectric constant; e is the same as _r Is a relative dielectric constant; a is the effective area of the electrode plate; d is the distance between the positive plate 1411 and the negative plate 1412, for a device made of a soft material, except that the effective area is unchanged, the change of other 3 quantities is easily affected by pressure, so when the charge distance is about 1nm, the capacitance density can be improved by 6 orders of magnitude compared with that of a common capacitance type sensor, the sensitivity is also improved, and the sensitivity S is:

wherein S represents sensitivity; x ₀ Represents an initial capacitance value; Δ X represents the relative change in capacitance, P represents the applied pressure, and δ represents the partial derivative sign. After the appropriate capacitance value and sensitivity are considered, the required pressure response range can be controlled, and the requirement of the test can be met.

In the first example, the structure of the second detecting member 142 is not limited as long as the second detecting member 142 can detect the flow rate of the blood. For example, the second sensing member 142 may be a thermal temperature difference sensing assembly. For another example, the second detecting element 142 may be a chip structure of the thermal difference detecting element, that is, the second detecting element 142 does not include a housing, and at this time, the base forms a housing of the chip structure of the thermal difference detecting element, and the base is used for protecting the chip structure of the thermal difference detecting element.

As an example, as shown in fig. 11, the second detecting member 142 may include a heat source 1423, a first temperature transmitter chip structure 1421 and a second temperature transmitter chip structure 1422, the first temperature transmitter chip structure 1421 and the second temperature transmitter chip structure 1422 are spaced apart from each other along the axial direction of the housing 110, and the first temperature transmitter chip structure 1421 and the second temperature transmitter chip structure 1422 are used for detecting the temperature of blood; a heat source 1423 is disposed between the first temperature transmitter chip structure 1421 and the second temperature transmitter chip structure 1422. A first temperature sensor chip structure 1421 and a second temperature sensor chip structure 1422 are disposed on symmetrical sides of the heat source 1423. In operation, with blood flowing through the receiving chamber 111 in the direction of diagram a, the heat source 1423 heats region C of fig. 11 to a temperature 1-2 ℃ above ambient temperature, and the temperatures monitored by the first temperature sensor chip structure 1421 and the second temperature sensor chip structure 1422 are the same if no blood flows through; if blood flows through the heat source 1423, the blood will carry the heat of the heat source 1423 downstream, so that the temperature distribution is asymmetric, and the temperature monitored by the second temperature transmitter chip structure 1422 at the downstream is higher than that of the first temperature transmitter chip structure 1421 at the upstream, so that the flow can be determined according to the corresponding relationship between the temperature difference and the flow; the correspondence of the temperature difference to the flow rate may be stored in the processor chip structure of the first sensing member 141.

In example one, the structure of the third detecting element 143 is not limited as long as the third detecting element 143 can detect the temperature of the blood. For example, the third detecting member 143 may be a resistance type temperature sensor. For another example, the third detecting element 143 may be a chip structure of the resistance temperature sensor, that is, the third detecting element 143 does not include a housing, and at this time, the seat body forms a housing of the chip structure of the resistance temperature sensor, and the seat body is used for protecting the chip structure of the resistance temperature sensor.

As an example, as shown in fig. 12, the third detecting member 143 may be a chip structure of a resistance temperature sensor, and the third detecting member 143 includes a temperature sensitive material layer 1431. Temperature resistivity (TCR) is an important indicator of the sensitivity of a resistance temperature sensor. It is defined as the relative change in resistance with a 1 ℃ change in temperature. Various resistive temperature sensors have been reported to use pure metal elements (Pt, au, cu), metal oxide particles, carbon Nanotube (CNT) polymer composites, and graphene as sensitive materials. As shown in fig. 12, the temperature measurement is performed by using the temperature-sensitive material layer 1431, and in the case where the blood flows through the accommodating chamber 111 in the direction of diagram a, the flowing blood contacts the third detecting member 143 in the direction of D, and the temperature of the blood enhances the thermal vibration of the crystal lattice, resulting in strong scattering of the electron wave, thereby increasing the resistivity of the temperature-sensitive material layer 1431; in addition, the signal output can improve the sensitivity of the temperature sensor by a signal amplifier (static differential circuit).

In an example one, the first detecting member 141, the second detecting member 142 and the third detecting member 143 may be disposed at intervals in a circumferential direction of the housing 110, so that the first detecting member 141, the second detecting member 142 and the third detecting member 143 detect pressure, flow rate and temperature of blood in the accommodating chamber 111 at the same position in an axial direction.

Of course, the first detecting member 141, the second detecting member 142 and the third detecting member 143 may detect the pressure, flow rate and temperature of blood through the flexible member 145; in this case, the first detector 141, the second detector 142, and the third detector 143 do not need to be provided with a protective case separately, and the installation space of the detection device 140 can be reduced.

In some optional implementations of embodiments of the present application, the blood pump may further include: inlet, outlet and two sets of detection devices 140 and controllers; an inlet disposed at a first end of the housing; the outlet is arranged at the second end of the shell; a first set of detection means 147 of said two sets of detection means 140 is arranged at said inlet 102, said first set of detection means 147 being adapted to detect a first pressure of blood at said inlet 102; a second set 148 of the two detection devices 140 is disposed at the outlet 101, the second set 148 being for detecting a second pressure of the blood at the outlet 101; the controller is electrically connected with the two detection devices 140 respectively, and the controller determines a first flow rate of the blood based on the pressure difference of the second pressure minus the first pressure; so that both a first pressure of the blood at the inlet 102 and a second pressure of the blood at the outlet 101 can be detected by the two sets of detection means 140 and a first flow rate of the blood can be determined based on a pressure difference of the second pressure minus the first pressure.

In the present implementation, the first detection means 140 and the second detection means 140 are identical to the detection means 140 described above, simply by the first and second distinction due to the different arrangement positions; the above description of the detection device 140 is not repeated here.

Here, the distance from the inlet 102 to the first group of detecting devices 147 is not limited, as long as the first group of detecting devices 147 is disposed at a distance from the impeller 120, so as to prevent the impeller 120 from affecting the detection of the first group of detecting devices 147. For example, the first set of detection devices 147 is 2mm from the inlet 102.

Here, the distance of the second sensing device 140 from the outlet 101 is not limited. For example, the second detection device 140 is spaced from the outlet 101 by a distance of 0.5 mm.

Here, the number of the first sensing devices 140 in the first set of sensing devices 147 is not limited. The number of second sensing devices 140 in the second set of sensing devices 148 is not limited.

As an example, as shown in fig. 3, 4 and 5, the first group detection device 147 includes: a first detection device 140; the second set of detection means 148 comprises: a second detection device 140.

Here, the first detecting means 140 and the second detecting means 140 may be symmetrically disposed in the circumferential direction of the housing 110, as shown in fig. 6, so as to facilitate the identification of which position the first detecting means 140 and the second detecting means 140 have a problem and to adjust in time when one of the first detecting means 140 and the second detecting means 140 is in contact with the blood vessel wall of the human body to affect the use of the first detecting means 140 and the second detecting means 140.

As a further example, as shown in fig. 7 and 8, the first group detection device 147 includes: two first detection means 140. The second set of detection means 148 comprises: two second detection devices 140; if one of the two first detecting means 140 fails, the other one of the two first detecting means 140 can also detect the first pressure of the blood at the inlet 102, so that the safety of the first detecting means 140 detecting the first pressure of the blood at the inlet 102 can be improved, and similarly, the two second detecting means 140 can also improve the safety of the second detecting means 140 detecting the second pressure of the blood at the outlet 101.

Here, the arrangement positions of the two first detection devices 140 are not limited. For example, as shown in FIG. 9,

the two first detecting devices 140 may be symmetrically disposed along the circumferential direction of the housing 110; so as to facilitate the identification of which of the two first detection means 140 has a problem in its position and to adjust in time when one of the two first detection means 140 is in contact with the vessel wall of the human body to affect the use.

Here, the arrangement positions of the two second detection devices 140 are not limited. For example, as shown in fig. 9, the two second detection devices 140 are symmetrically arranged along the circumferential direction of the housing 110; so as to facilitate the identification of which one of the two second detection means 140 has a problem in its position and to adjust it in time when one of the two second detection means 140 is in contact with the vessel wall of the human body to affect the use.

Here, as shown in fig. 9, the two first detection devices 140 and the two second detection devices 140 may be uniformly arranged in the circumferential direction of the housing 110, so that when one of the two second detection devices 140 and the two first detection devices 140 is in contact with the blood vessel wall of the human body to affect the use, which detection device 140 has a problem in position is identified to be timely adjusted.

Of course, the two first detecting devices 140 and the two second detecting devices 140 may also be disposed unevenly in the circumferential direction of the housing 110.

In this implementation, the implementation in which the controller determines the first flow rate of blood based on the pressure difference of the second pressure minus the first pressure is not limited. For example, a first flow rate correspondence relationship is stored in the controller for the second pressure minus the first pressure, and the controller determines the first flow rate based on the correspondence relationship. For another example, the controller stores a curve corresponding to the pressure difference between the second pressure and the first flow rate, and determines the first flow rate based on the corresponding curve.

Of course, the detection device 140 may also be used to directly detect the second flow rate of the blood. Here, the controller may be further configured to calculate an average flow rate of the blood based on the first flow rate and the second flow rate, so as to improve accuracy of detecting the flow rate by the detecting device 140.

The blood pump of the embodiment of this application includes: a housing 110 having an accommodation chamber 111 and a mounting hole 113, the mounting hole 113 communicating with the accommodation chamber 111; an impeller 120 rotatably disposed in the accommodating chamber 111; a driving device 130 for driving the impeller 120 to rotate in the accommodating cavity 111; a detection device 140, at least a part of which is deformable, inserted into the mounting hole 113, for detecting a parameter of the blood in the accommodating cavity 111; the working condition of the blood pump can be known by detecting the parameters of the blood in the accommodating cavity 111 through the detection device 140, the arrangement space of the detection device 140 can be reduced by inserting the detection device 140 into the mounting hole 113, and the difficulty of installing the detection device 140 in the mounting hole 113 can be reduced because at least part of the detection device 140 can be deformed.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A blood pump with a detection device, the blood pump comprising:

the shell is provided with an accommodating cavity and a mounting hole, and the mounting hole is communicated with the accommodating cavity;

the impeller is rotatably arranged in the accommodating cavity;

the detection device is at least partially deformable and is inserted into the mounting hole to detect parameters of blood in the accommodating cavity, wherein the mounting hole penetrates through the shell so that the detection device can be inserted into the mounting hole from outside to inside;

the detection device includes: the base body is at least partially deformable and at least partially inserted into the mounting hole; at least one detection member, arranged in the seat body, for detecting a parameter of the blood in the containing cavity; the flexible part is arranged on the side, facing the accommodating cavity, of the seat body and is in contact with the at least one detection part;

the pedestal includes: the base part can deform, is inserted into the mounting hole and is provided with a through groove; the at least one detection piece is arranged in the through groove; the flexible piece is blocked at the through groove and is positioned on the side, facing the accommodating cavity, of the base part; and a cover portion connected to the base portion and covering the at least one detection member.

2. The blood pump of claim 1, wherein the detection device comprises:

the third detection piece is arranged on the seat body and used for detecting the temperature of the blood;

3. The blood pump of claim 1, wherein the at least one sensing element is configured to sense at least one of a flow rate, a pressure, and a temperature of blood.

4. The blood pump of claim 1, further comprising:

an inlet disposed at a first end of the housing;

an outlet disposed at a second end of the housing;

two sets of detection devices; the first group of detection devices in the two groups of detection devices are arranged at the inlet and are used for detecting a first pressure of blood at the inlet; a second set of detection devices of the two sets of detection devices is disposed at the outlet, the second set of detection devices being configured to detect a second pressure of the blood at the outlet;

and the controller is electrically connected with the two groups of detection devices respectively and determines a first flow rate of the blood based on the pressure difference of the second pressure minus the first pressure.

5. The blood pump of claim 4, wherein the detection device is further configured to detect a second flow rate of the blood;

6. The blood pump of claim 4, wherein the first set of detection devices comprises: a first detection device; the second set of detection means comprises: a second detecting means; the first detection device and the second detection device are symmetrically arranged in the circumferential direction of the shell; or the like, or, alternatively,

7. The blood pump of any one of claims 1 to 6, wherein the housing further comprises:

8. The blood pump of claim 7, further comprising:

a first connecting line; the first end of the first connecting wire is arranged in the driving device, and the second end of the first connecting wire extends out of the driving device;