JP2001170166A - Liquid supply pump - Google Patents

Abstract

(57) [Problem] To provide a liquid supply pump that can be quickly and easily and reliably attached to and detached from a piping system. A pump is a centrifugal pump in which a pedestal is rotatably provided inside a housing having a tubular liquid inlet and a liquid outlet, and a plurality of blades are provided substantially upright on an upper surface side of the pedestal. The liquid supply pump according to claim 1, wherein one of a liquid inlet portion and a liquid outlet portion of the housing is provided with a male luer lock type joint, and the other is provided with a female luer lock type joint. I do.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a pump for supplying a body fluid, particularly blood.

[0002]

2. Description of the Related Art In some cases, it is necessary to supply blood at a constant flow rate in the operation or treatment of the circulatory system due to a heart disease or the like. In such a case, a blood pump is used. There are various types of blood pumps, and roller pumps have been widely used as low-cost blood pumps. However, the roller pump has a problem in that the mechanically operated portion of the roller pump crushes or crushes blood cell components in blood, thereby destroying the blood cells to be supplied. Therefore, centrifugal pumps have been increasingly used recently because of their advantages such as downsizing and easy securing of a steady flow of blood. The blood pump is connected between various devices used as needed, such as a heart-lung machine, and a patient via a tube made of a flexible plastic material or the like,
A blood flow circuit is formed.

As a conventional joint structure of a blood pump, as shown in FIG. 10, a liquid inlet 104 through which blood flows into the pump and a liquid outlet 105 through which blood flows out of the pump are provided. The inlet portion 104 and the liquid outlet portion 105 are generally formed in a circular tube shape. In order to connect the tube to the blood pump, a connection form in which the ends of the tubes to be connected are directly covered and fitted to the liquid inlet portion 104 and the liquid outlet portion 105 provided in the pump housing 110, respectively, is generally used. Had been adopted.

[0004] A plurality of annular protrusions 111 are adjacent to the liquid inlet 104 and the liquid outlet 105, which are substantially circular tubular connecting parts, at a portion near each end on the outer surface of the circular tube. It is provided. When observed in a cross-sectional view passing through the axis of the cylinder, the annular protrusion has a shape of a plurality of adjacent peaks, and the slopes forming the respective peaks have slopes 111 farther from the end.
a is almost vertically steep, and the slope 1 near the end is
11b is formed in a form having an ascending gradient toward the vertex of the protruding portion, and therefore, can be described as having a substantially sawtooth shape in cross section. When the tube is placed over and connected to the inlet 104 or the liquid outlet 105 in such a form, the annular projecting portion 111 has a so-called retaining function of preventing the tube from coming off. In addition, the above-mentioned form is a well-known thing as a form of the tubular connection part for connecting a tube.

[0005] Further, the liquid inlet portion 10 having the above-described configuration is used.
When a tube is connected to the liquid outlet 4 and the liquid outlet 105, the inner diameter of the tube generally has a dimension substantially equal to the outer diameter of the circular tube forming the liquid inlet 104 or the liquid outlet 105. Alternatively, when the tube has elasticity, a tube having a dimension slightly smaller than its outer diameter has been used.
When connecting, considerable effort was required to push the end of the tube into the tubular connection. Also, simply pushing the tube into the tubular connection may make it difficult to connect the tube to the tubular connection. In such a case, the inside of the end of the tube to be connected to the tubular connection is made of a saline solution or the like. It was made slippery by moistening with a pipe and then connected to the tubular connecting part by covering. As described above, in the conventional connection mode, connection requires time and labor, and it is difficult to quickly connect.

[0006] In the blood pump having such a configuration, it is most important to prevent the tube from coming off during the operation of the pump. Therefore, it is desirable that the tube once connected does not come off easily. The annular projection as described above is provided with a projection having a sawtooth cross section in a form in which the largest frictional force acts in the direction in which the tube comes off, so that such a retaining function is maximized. Is considered. Furthermore,
It is also attempted to wrap a tightening band or the like from the outside of the tube fitted in the tubular connecting portion to secure the tube from falling off.

However, during operation of the blood pump, it is necessary to replace the blood pump at a predetermined time, for example, or the housing, the liquid inlet and the housing due to physical shock such as poor rotation of the blood pump and dropping of the blood pump. It is necessary to remove the tubing from the blood pump and connect another tubing, or connect another blood pump to the removed tubing, for reasons such as a crack at the outlet and blood clotting in the blood pump. May be done.

In the connection type of the conventional type described above, when the tube is to be removed from the blood pump, for example, the operation of the blood pump is stopped, and the operation of the tube connected to the blood pump is stopped. The blood flow is stopped by sandwiching the portion with forceps or the like, and the tube is cut with scissors at a portion slightly away from the liquid inlet or the liquid outlet circular tube, and then the liquid inlet or the liquid outlet circular tube is cut off. An operation of cutting open the tube covering the part or forcibly extracting the tube from the blood pump is required, and it has been difficult to remove the tube in a short time. Further, in the case of removing the blood, when the operation of cutting or incising the tube with scissors or the operation of forcibly pulling out the tube, blood remaining in the tube may be scattered around. For example, HIV
Diseases that can be transmitted through the blood, such as (human immunodeficiency virus) and hepatitis, also have the potential to be transmitted by such blood splatters. Therefore, in order to prevent the possibility of accidental infection, such scattering of blood is not preferable, and it is necessary to take other measures to prevent blood from scattering and attaching to the operator. Become.

Further, in a blood circuit formed by connecting a blood pump to various devices such as a heart-lung machine by a tube, the direction of blood flow is fixed in a certain direction. Also, the blood inlet side and the blood outlet side are strictly defined, and therefore, a tube (inlet side tube) to be connected to the inlet 104 of the blood pump and a tube (outlet) to be connected to the outlet 105 of the blood pump. The connection destination (that is, the inlet 104 and the outlet 105) of each of the side tubes is strictly specified. Therefore, when performing an operation of replacing a blood pump, a tube, or the like in such a blood circuit, the inlet tube is connected to the outlet 105 and the outlet tube is connected to the inlet 1.
If a situation occurs in which the connection is mistakenly made to the connection 04, there is a great possibility that a fatal accident involving human life will be caused, and such an erroneous connection must be strictly prevented.
However, when using a tube having a joint structure like a conventional type, between the inlet side tube and the outlet side tube, and between the inlet part 104 and the outlet part 10 of the blood pump.
In the case where there is no particular difference in the dimensions and the shape of the tube between the tube 5 and the tube 5, the possibility of incorrect connection cannot be eliminated, and even if a slight difference is provided. In the case of heart surgery, for example, since it is necessary to make a connection in a short time, it has been difficult to completely eliminate the possibility of erroneous connection due to rush operation. Therefore, for example, in the case of a cardiac operation, it was necessary for a clinical engineer or the like to pay particular attention to the operation so as not to cause a misconnection, but this is an excessive mental burden Therefore, it is difficult to eliminate erroneous connection due to human error.

[0010]

SUMMARY OF THE INVENTION One object of the present invention is to solve the problems associated with the conventional connection configuration as described above, and to make the operation of attaching and detaching tubes quick and accurate, as well as easy and reliable. The present invention is to provide a liquid supply pump that can be used for the following. It is another object of the present invention to provide a liquid supply pump having a joint capable of quickly and accurately as well as easily and reliably detaching a tube.

[0011]

According to one aspect of the present invention, a pedestal is rotatably provided inside a housing having a tubular liquid inlet and a liquid outlet, and a plurality of blades are provided on an upper surface side of the pedestal. Is a centrifugal type liquid supply pump having a radial luer lock, a male luer lock type fitting on one of a liquid inlet and a liquid outlet of a housing, and a female luer lock on the other. Provided is a pump characterized in that a type joint is provided.

The luer lock type joint used in the present invention is formed by engaging a male joint part and a female joint part in combination as disclosed in, for example, US Pat. No. 4,439,188. It is a joint capable of connecting a pipe such as a tube so as to form a connection such that liquid does not leak out from the joint portion to the outside, and is known as a joint mechanism.

In the present invention, in one embodiment, a luer lock type joint having such a normal joint mechanism is used. Further, in another embodiment of the present invention, as described below, a joint mechanism having a feature in its internal structure is used while having a normal form.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of an embodiment of the present invention will be described in more detail with reference to the drawings.
The present invention is not limited to these embodiments.

[First Embodiment] FIG. 1 is a side view when a liquid supply pump of the present invention is used as a blood pump. In order to make it easy to understand the internal mechanism of the pump, main internal components are shown by dashed lines in this side view.

In FIG. 1, the pump 10 is composed of a pump head section 20 for flowing a liquid and giving a flow to the liquid, and a pump driving mechanism section 30 having a mechanism for driving the pump head section 20. . Pump head 2
0 and the pump drive mechanism 30 are separated by a partition wall 40 so that the liquid does not leak.

The pump head section 20 has a funnel-like housing 21 forming an outer wall portion thereof. A pedestal 22 formed in the shape of an open umbrella is provided inside the housing 21 so as to be rotatable around the axis of the umbrella. On the upper surface side of the pedestal 22, a plurality of (six in the embodiment shown) flat plate blades 23 are equal to each other on the pedestal 22, which is substantially circular in plan view, according to the number thereof. It is erected almost radially at an angle. That is, as the pedestal 22 rotates, the flat surface of each wing plate 23 can push out the liquid existing in the housing 21.

The pedestal 22 includes a drive shaft 3 penetrating the partition wall 40.
1 is connected to a motor mechanism (not shown) provided in the pump drive mechanism section 30. As described above, the partition 40 is sealed in a portion where the drive shaft 31 penetrates so that the liquid does not leak. As the motor mechanism, the sealing means, and the means for driving the drive shaft 31 by the motor mechanism via the sealing means, various known means can be adopted.

The housing 21 of the pump head 20 is provided with a liquid inlet 24 opening upward from the housing 21 in FIG. 1 and a liquid outlet 25 extending leftward from the housing 21 in FIG. ing. The liquid inlet 24 is in the form of a circular tube substantially concentric with the rotation axis of the pedestal 22. In the embodiment shown in FIG. 1, the liquid inlet 24 is provided with a female luer lock type joint 26. .

At the end of the liquid inlet 24, a male luer lock type joint 51 which can be engaged with the female luer lock type joint 26 in a liquid-tight manner is attached. The tube 52 is connected. The other end of the tube 52 is connected to a blood supply unit (not shown) via another device provided as needed.

The liquid outlet portion 25 is also in the form of a circular tube, and has a tangential direction from the circular pedestal 22 as shown in FIG. 2 as a plan view corresponding to the AA line arrow in FIG. It is open to extend outward. 1 and 2, the liquid outlet 25 is provided with a male luer lock type joint 27.

At the end of the liquid outlet 25, a female luer lock type joint 53 which can be engaged in a liquid-tight manner with the male luer lock type joint 27 is mounted. The tube 54 is connected. The other end of the tube 54 is connected to a patient (not shown) or the like via another device provided as necessary.

In the pump 10 having such a structure, the tubes 52 and 54 are connected to predetermined connection destinations to fill the pump head 20 with blood, and the pump driving mechanism 3
When the drive shaft 31 is rotated by 0, the pedestal 22 rotates around the rotation axis in the direction indicated by the arrow a in FIG. 2, and as a result, the plurality of blade plates 23 that rotate around the rotation axis of the pedestal 22 Then, a flow in the direction of arrow b is formed in the blood. That is, the blood flow as described above is formed by the centrifugal force that rotates the blade plate 23 of the pump 10.

When the pump 10 is separated from the tubes 52 and / or 54, the operation of the pump 10 is stopped, and the tube 52 is moved near the luer lock type fitting 51 and / or the tube 54 is moved to the luer. Close the lock type joint 53 with forceps or clips to prevent the liquid from leaking, and then twist the coupled male and female luer lock type joints 51 and 26 and / or 53 and 27. It can be separated by pulling it apart.

FIG. 3 shows a male luer lock type joint.
A joint 61 having a collar 60 as shown in FIG.
And a joint 62 having no collar as shown in FIG. The male luer lock type joint has a tapered cylindrical portion 6 whose outer diameter gradually decreases toward the tip.
Five. The degree of the taper may be such that the tip portion has a slightly smaller dimension than the base portion of the cylindrical portion 65. Similarly, the inner diameter of the cylindrical portion 65 can also be changed so as to gradually decrease toward the tip, but the inner diameter does not need to be substantially changed over the entire length of the cylindrical portion.

FIG. 4 shows a female luer lock type joint.
FIG. 4A shows a joint 63 having a thread form as shown in FIG.
As shown in FIG. 3B, there is a joint 64 having a flange portion that protrudes in the circumferential direction at the tip end. Inside the female luer lock type fitting, the fitting portion is sealed in a liquid-tight state by fitting the male luer lock type fitting with the cylindrical portion 65, and the female luer lock type fitting and the male luer lock type fitting are further sealed. A hole 66 having a taper capable of connecting to a luer lock type joint is provided.

Therefore, when the corresponding male luer lock type joint and female luer lock type joint are fitted,
The two tapered surfaces of the cylindrical portion 65 and the hole 66 are in close contact with each other, and the mating state is maintained mainly by the frictional force between the tapered surfaces of the cylindrical portion 65 and the hole 66, and the liquid-tight state is achieved. A sealed connection can be formed. Such luer lock type coupling mechanisms are known per se, and are available in various sizes and shapes from, for example, S4J Manufacturing Service, Inc. (New Jersey, USA).

In this embodiment, the female luer lock type joint 26 at the liquid inlet 24 of the housing 21 and the male luer lock type joint 27 at the liquid outlet 25 are both made of the same plastic as the housing 21. It is formed integrally with the housing 21 using a material. In this case, the male luer lock type joint 27 provided in the liquid outlet 25 can be formed by molding only the collar as a separate body and then fitting it into the cylinder. Therefore, the cost can be reduced by integrally molding the housing and the joint portion of the pump.

When the male luer lock type joint 61 shown in FIG. 3 (a) and the female luer lock type joint 63 shown in FIG. 4 (a) are connected, a connection state shown in FIG. 5 (a) is obtained. In this case, the threaded portion of the female luer lock type joint 63 is guided into the thread groove inside the collar 60 of the male luer lock type joint 61, and the other joint is formed into a tubular shape with respect to one of the joints. Twist several degrees to one hundred and several tens of degrees around the center axis of the joint, the male luer lock type joint tube 65
In addition to the fact that the tapered surfaces of the female luer lock type fitting and the hole portions 66 of the female luer lock type fitting are fitted, the thread portion of the female luer lock type fitting 63 and the collar 60 of the male luer lock type fitting 61 Engages with the inside thread groove of
Both can be connected in a liquid-tight state.

When the male luer lock type joint 61 shown in FIG. 3 (a) and the female luer lock type joint 64 shown in FIG. 4 (b) are connected, a state shown in FIG. 5 (b) is obtained.
In this case, the flange portion 64-f of the female luer lock type joint 64 is guided into the thread groove inside the collar 60 of the male luer lock type joint 61, and one of the joints is circular. Twist a few tens to a hundred and a few tens of degrees around the central axis of the tubular joint, the male luer lock type joint tube 6
In addition to the fact that the tapered surfaces of the female luer lock type fitting 5 and the hole portions 66 of the female luer lock type fitting are fitted, the flange portion 64-f of the female luer lock type fitting 64 and the male luer lock type fitting 61 The thread groove on the inside of the collar 60 is engaged, and both can be connected in a liquid-tight state.

When the male luer lock type joint 62 shown in FIG. 3 (b) and the female luer lock type joint 63 shown in FIG. 4 (a) are connected, a state shown in FIG. 6 (a) is obtained.
In this case, the respective tapered surfaces of the cylindrical portion 65 of the male luer lock type joint 62 and the holes of the female luer lock type joint 63 are fitted mainly by frictional force so that they are in a liquid-tight state. Can be connected.

When the male luer lock type joint 62 shown in FIG. 3 (b) and the female luer lock type joint 64 shown in FIG. 4 (b) are connected, a state shown in FIG. 6 (b) is obtained.
In this case, the connection between the male luer lock type joint 62 and the female luer lock type joint 64 is the same as that described above with reference to FIG.

In the above description, a female luer lock type fitting is attached to the liquid inlet portion of the pump, and a male luer lock type fitting is attached to the liquid outlet portion. A male luer lock type fitting can be attached to the liquid inlet of the pump, and a female luer lock type fitting can be attached to the liquid outlet.
Further, in the above description, the luer lock type joint is described as having a circular tube shape, but is not necessarily limited to the circular tube shape as long as the above-mentioned attaching / detaching operation can be performed, and is not limited to the circular tube shape. In the drawing, the outer shape of the luer lock type joint and the liquid flow path inside may be formed in a polygonal shape. However, it is preferable that the cross-sectional shape of the liquid flow path inside the luer lock type joint is circular in order to ensure a smooth flow of the fluid.

This is because, at the site where the pump of the present invention is used, for example, by providing an arrangement such that a female luer lock type joint is provided on the side into which the liquid flows, it is possible to use a tube ( Whether it is piping or other equipment, the side to which the female luer lock type fitting is attached is always the side where the liquid flows in. Therefore, in this case, the male luer lock type fitting is used. It is clear that the side provided is the side from which the liquid always flows. Conversely, when the inflow side is a male luer lock type joint, the outflow side is a female luer lock type joint. Neither the male luer lock type joint nor the female luer lock type joint can be connected.

For example, when blood is supplied using a blood pump during an operation or the like, if the connection between the pipe and the pump is incorrectly connected, there is a risk of causing an accident that may be life-threatening. By using the pump described above, it is possible to prevent a mistake in connection of piping that connects the liquids in the wrong direction, and to prevent a medical accident in which blood flows in the opposite direction.

Embodiment 2 Another embodiment of the present invention will be described mainly with reference to FIG. In the embodiment shown in the second embodiment, the female luer lock type joint 76 at the liquid inlet 74 of the housing 71 and the male luer lock type joint 77 at the liquid outlet 75 are both separate from the housing 71. Is different from the mode shown in the first embodiment.

In this embodiment, the luer lock type joint 7
The housing 71 is used as a common member in a unified standard, and a suitable luer lock is used according to the type of liquid, flow rate or tube size, etc. Type joint 76
-77 and the housing 71 can be used in combination. However, the housing 71 may be provided in various sizes and shapes, and the luer lock type joint and the housing may be appropriately combined according to the application. The connecting portion between the luer lock type joints 76 and 77 and the housing 71 can be formed by applying a known connecting means such as a screw engaging means.

Embodiment 3 Another embodiment of the present invention will be described with reference to FIGS. In this embodiment, the internal mechanism of the pump head unit 20 that forms the blood flow of the blood pump
It is intended to have a structure capable of preventing the formation of thrombus and coagulation.

Therefore, in another embodiment of the present invention, in a state where the male and female luer lock type joints are connected, the tubular liquid inside the cylindrical portion 65 of the male luer lock type joint is connected. The flow path and the tubular liquid flow path inside the hole of the female luer-lock type fitting have a typical inner diameter as shown in FIG. 5 (a) and substantially the same size. Provided.

Therefore, when the luer lock type joint is connected, the tubular liquid flow path formed inside the connection portion forms a pipe having substantially the same inside diameter as a single pipe. can do. When blood is supplied using the pump according to the present invention having such a Luer lock type joint, no dead space is formed in the connecting portion of the tube and the Luer lock type joint, and the structure of the piping portion is complicated. The occurrence of thrombus and coagulation due to stagnation of blood cells can be prevented.

Further, in this embodiment of the present invention, in a blood pump employing a Luer lock type joint for connection to a tube, the inner surface of the joint portion has no complicated unevenness and the inner surface is smooth. It is another feature to provide a luer lock type fitting that is cylindrical.

FIG. 8 shows a liquid inlet portion 84 of the housing 81.
The female luer lock type joint 8 of the type shown in FIG.
6 is provided with a female luer lock type joint 87 of the type shown in FIG. 3 (a) at the liquid outlet portion 85 of the housing 81, and both luer lock type joints 86 and 8 are provided.
That the inside of 7 is provided in a smooth cylindrical shape,
It is shown partially broken.

In the embodiment shown in FIG. 8, the hole 66 of the female luer lock type joint 86 existing at the liquid inlet 84 is shown to have a slight taper. The degree of the taper is such that the side closer to the housing 81 of the hole 66 is the housing 81 of the hole 66.
It may have a dimension slightly smaller than the side far from the side. The degree of this taper is formed so as to correspond to the degree of taper of a male luer lock type joint (not shown) fitted to the female luer lock type joint 86.

[Embodiment 4] In this embodiment, as shown in FIG. 9, a male luer lock type joint 96 and a female luer lock type joint 97 are formed in the same manner as in the second embodiment.
The blood pump is formed separately from the housing 91 of the blood pump 10, and further provided is a blood pump in which a joint having a smooth cylindrical inner surface is combined with the housing 91 as in the third embodiment. The connecting portion between the luer lock type joint and the housing can be formed by applying a known connecting means such as a screw engaging means.

FIG. 9 shows the liquid inlet 94 of the housing 91.
7 is provided with a joint 96 similar to the male luer lock type joint 76 shown in FIG. 7 and a joint 97 similar to the female luer lock type joint 77 shown in FIG.
Are respectively provided, and the insides of both the luer lock type joints 96 and 97 are provided in a smooth cylindrical shape, which is partially broken away. Note that the inner diameter of the joint portion in the embodiment shown in FIG.
In the third embodiment shown in FIG.

As described above, various embodiments in the case where the pump of the present invention is used as a blood pump have been described.
The pump of the present invention can be quickly and easily attached to and detached from the piping system,
And because it can be done reliably, not only blood,
It can also be used for supplying body fluids at medical sites such as in the case of plasma, infusions, drug solutions and the like. Furthermore, in biochemical experiments, etc., it is necessary to quickly and easily and surely attach and detach a pump and a piping system for supplying a fluid (liquid) containing blood and body fluids and components similar thereto. However, the pump and / or luer lock type joint of the present invention is also useful in such a case.

[0047]

According to the present invention, a male luer lock type joint is provided at one of the liquid inlet and the liquid outlet of the pump housing, and a female luer lock type joint is provided at the other. In addition, it is possible to prevent a mistake in connecting the pump and the pipe of the tube by changing the flowing direction of the liquid.

When the pump of the present invention is used as a blood pump or a bodily fluid pump, as described above, a male luer lock type fitting is provided at one of the liquid inlet and the liquid outlet of the housing of the pump, and the other is provided at the other. By providing the female luer lock type joint, it is possible to prevent a piping connection error at the medical site where the blood flows in the opposite direction.

Further, by employing a luer lock type joint between the pump and the pipe (tube), the pipe (or tube) can be quickly and easily and reliably attached and detached. Therefore, it can be suitably used for medical use. In the pump of the present invention, when the luer lock type joint is formed integrally with the housing, it is possible to reduce the manufacturing cost of the housing and the joint part of the pump.

In the pump of the present invention, when the luer lock type joint is formed separately from the housing, a plurality of types of luer lock type joints 76 and 77 are provided with respect to the diameter and shape. Also, various sizes and shapes can be provided, and the luer lock type joint and the housing can be appropriately combined and used according to the type or flow rate of the liquid to be supplied.

In the pump of the present invention, when the pipes having the corresponding luer lock type fittings are connected to the liquid inlet and the liquid outlet, respectively, the pumps are formed inside the connecting portions formed by the connected male and female luer lock type fittings. When the liquid flow path provided is provided so that the inner diameters of substantially the same dimensions are continuous, the liquid flow path becomes a pipe as if it were a single pipe, in which dead space is provided. Is not formed, so that in the case of disrupting the flow of the liquid to be supplied or supplying blood, it is possible to prevent blood clots and blood clots due to the complicated internal structure of the piping portion.

A centrifugal type according to the present invention in which a pedestal is rotatably provided inside a housing having a tubular liquid inlet portion and a liquid outlet portion, and a plurality of vanes are provided substantially radially on the upper surface side of the pedestal. According to a luer-lock type joint, the liquid supply pump according to the above is attached to the liquid inlet portion and / or the liquid outlet portion of the housing, and the liquid passage inside has substantially the same inner diameter. When the male and female luer lock type joints are connected to each other, the liquid flow path formed inside the connection portion composed of the connected male and female luer lock type joints has substantially the same inner diameter as the inner diameter. A pipe is formed as if it were a single continuous pipe, and there is no dead space formed in the pipe, which disrupts the flow of the liquid to be supplied or supplies blood Expediently, blood clots internal structure of the pipe portion due to complicated, it is possible to prevent clotting.

When the above-described liquid supply pump according to the present invention is used to form a pipe in combination with a tube having a luer lock type fitting corresponding to a luer lock type fitting attached to the pump at an end portion, the liquid is supplied. A method is provided in which the effect as described above for the feed pump is obtained and / or the effect as described above for the luer lock type joint is obtained.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing the configuration of the whole blood pump of the present invention.

FIG. 2 is a horizontal sectional view schematically showing the blood pump of the present invention.

FIG. 3 is a typical side view of a male luer lock type joint used in the blood pump of the present invention.

FIG. 4 is a typical side view of a female luer lock type joint used in the blood pump of the present invention.

FIG. 5 is a side view showing a connected state of a luer lock type joint used in the blood pump of the present invention.

FIG. 6 is a side view showing a connected state of a luer lock type joint used for the blood pump of the present invention.

FIG. 7 is an exploded front view showing another embodiment of the blood pump of the present invention.

FIG. 8 is a partially cutaway front view showing still another embodiment of the blood pump of the present invention.

FIG. 9 is an exploded front view, partially broken away, showing still another embodiment of the blood pump of the present invention.

FIG. 10 is a partially broken front view showing a conventional blood pump.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Pump, 20 ... Pump head part, 21 ... Housing, 22 ... Pedestal, 23 ... Blade plate, 24 ... Liquid inlet part, 25 ... Liquid outlet part, 26 ... Female luer lock type joint, 27 ... Male luer lock Type joint, 30 ... Pump drive mechanism part, 31 ... Drive shaft, 40 ... Partition wall, 51 ... Male luer lock type joint, 52, 54 ... Tube,
53 ... female luer lock type joint, 60 ... collar, 61, 62 ... male luer lock type joint, 6
3, 64: female luer lock type joint, 64-f: flange portion, 71, 81, 91: housing, 74, 8
4, 94: liquid inlet, 75, 85, 95: liquid outlet, 76, 86, 96: male luer lock type joint,
77, 87, 97 ... female luer lock type joint, a,
b ... arrow.

Claims (7)

[Claims] 1. A centrifugal liquid in which a pedestal is rotatably provided inside a housing having a tubular liquid inlet and a liquid outlet, and a plurality of blades are provided substantially radially on the upper surface of the pedestal. A pump, characterized in that a male luer-lock type joint is provided on one of a liquid inlet and a liquid outlet of a housing, and a female luer-lock type joint is provided on the other. . 2. The pump according to claim 1, wherein the liquid is blood or body fluid. 3. The pump according to claim 1, wherein the luer lock type joint is formed integrally with the housing. 4. The pump according to claim 1, wherein the luer lock type joint is formed separately from the housing. 5. A liquid flow formed inside a connecting portion formed of a connected male and female luer lock type joint in a state where pipes having respective luer lock type joints are connected to the liquid inlet portion and the liquid outlet portion. A pump according to any of the preceding claims, characterized in that the passages are provided such that substantially the same inner diameter is continuous. 6. A centrifugal liquid in which a pedestal is rotatably provided inside a housing having a tubular liquid inlet portion and a liquid outlet portion, and a plurality of blade plates are provided substantially radially on the upper surface side of the pedestal. A feed pump attached to a liquid inlet and / or a liquid outlet of the housing;
A luer lock type joint, wherein the inner liquid flow path has substantially the same inner diameter. 7. A pump having a luer lock type fitting corresponding to the luer lock type fitting attached to the pump according to claim 1 and connected to the pump using a tube having an end portion. A method for forming a liquid flow path.