JPH10290831A - Dialyzer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To preclude the possibility of causing a malfunction such as slipping- out and a kind of a connector without forming an unreasonable blood circuit even if a patient is arranged on the right side or the left side to a lying down bed and also on the bed head part side and even when the patient is a right shunt or a left shunt. SOLUTION: A stator 11 of a blood pump is rotatably installed in a casing while holding the axis of a rotor in the same shape. A motor 13 of the blood pump is formed as a reciprocally rotatable structure, and the rotational direction of the motor is decided on the basis of detecting signals from detecting means 26a, 26b to detect a rotating condition of the stator of the blood pump. A lock mechanism 25 to decide a rotating position of the stator in a prescribed position, is interposed between the device casing and the stator of the blood pump.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dialysis apparatus used for hemodialysis, and more particularly to a dialysis apparatus which can be arranged at an arbitrary position such as a right side or a left side with respect to a bed on which a patient lies.

[0002]

2. Description of the Related Art Conventionally, a dialysis apparatus having a structure as shown in FIG. 6 has been known for use in hemodialysis.
In the dialysis apparatus 1, a blood pump 3 is incorporated in a casing 2, and an arterial chamber 5, a venous chamber 6, and a dialyzer 7 are supported by a rod 4 arranged in an upright state near the casing 2, respectively. ,
Among these devices, those related to each other are connected to each other via a tube 8. And
In the dialysis apparatus 1, blood drawn from a patient flows into a blood pump 3 via a tube 8, and is sent therefrom with a predetermined pressure so as to sequentially pass through an arterial chamber 5, a dialyzer 7, and a venous chamber 6. After starting
It will be pushed back to the patient again. Then, predetermined impurities are removed when the blood passes through the dialyzer 7.

[0003]

The conventional dialysis apparatus has the following disadvantages because the blood pump is fixedly attached to the casing.

That is, in many facilities, a dialysis device is installed between beds, and as shown in FIG.
Using the bed 9 located on the left side of the dialysis device 1,
When dialysis is performed on a patient in the left shunt, each device or a tube 8 connecting the device and the patient has a relatively short length without crossing each other, and is applied to the patient via a blood pump through each device such as a dialyzer. Although a return blood circuit can be formed, as shown in FIG. 8, when using the bed 9 located on the left side of the dialysis apparatus 1 and using it for a patient with a right shunt, the tube 8 connecting the device and the patient is The disposition is such that it fits over the patient's body, causing discomfort to the patient. Further, the arrangement is such that the pulling force easily acts on the tube 8, and the connection portion between the tube 8 and the shunt is easily detached. In addition, the length of the tube connecting the device and the patient is longer. In addition, when trying to share such a longer tube 8 with a left shunt patient, the longer tube 8 may be used.
Has to be used, there is an inconvenience that the filling amount of the tube 8 increases.

As shown in FIG. 9, when dialysis is performed on a patient with a right shunt by using a bed 9 located on the right side of the dialysis apparatus 1, a tube 8 connecting the equipment and the patient is connected to the patient. Although it is not arranged to fit over the body, the tube 8 is bent so as to change its direction by 180 degrees when it comes out of the blood pump 8, and the blood circuit may be kinked.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to arrange a patient on the right or left side with respect to a bed on which the patient is lying, and further, even if the patient is arranged on the bed head side. Also, the present invention provides a dialysis apparatus which does not form an unreasonable blood circuit even when a patient is in a right shunt or a left shunt, and is free from problems such as disconnection of a connector or kink.

[0007]

The present invention has the following features to attain the object mentioned above. That is, in the dialysis device according to claim 1, a blood pump including a motor, a stator, a rotor arranged coaxially with each other, and a motor for rotating the rotor is provided on the casing such that the axis of the rotor is oriented in the horizontal direction. In a dialysis apparatus which is attached and feeds blood through a dialyzer for removing wastes by the blood pump, a stator of the blood pump faces a vertical surface against the casing while keeping the axis of the rotor the same. It is configured to be rotatable along the. In the dialysis device according to claim 2, the motor of the blood pump has a structure capable of rotating forward and backward, detects a rotation state of a stator of the blood pump, and determines a rotation direction of the motor based on a detection signal thereof. It is configured to have means. According to a third aspect of the present invention, in the dialysis device, a lock mechanism for determining a rotation position of the stator at a predetermined position is interposed between the device casing and a stator of the blood pump. Claim 4
In the dialysis device described above, the rotation lock mechanism is provided with the detection means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the dialysis apparatus according to the present invention will be described below with reference to FIGS. Note that among the constituent elements of the embodiment of the present invention, the same constituent elements as those described in the conventional example are denoted by the same reference numerals, and the description will be simplified.

[0009] A blood pump 14 having a stator 11 and a rotor 12 disposed coaxially with each other and a motor 13 for rotating the rotor 12 is provided on the casing 2.
2 is attached so as to extend along the horizontal direction, but the feature of the present invention is that the stator 11 of the blood pump 14 is vertically attached to the casing 2 while keeping the axis L of the rotor 12 the same. The point is that it is rotatably mounted along the surface. The blood pump 14 will be described in more detail. As shown in FIG. 1, a horseshoe-shaped stator 11 is provided on the head side of the blood pump 14, and one side (left side in FIG. 1) of the stator 11 has one side. The blood connection port 11a is located on the lower side, and the other blood connection port 11b is located on the upper side. The distal ends of the tubes 8a, 8b are connected to the blood connection ports 11a, 11b.

The rotor 12 is rotatably provided in a central space of the stator 11. The rotor 12 is provided with a pair of support arms 15 extending from the center of rotation by 180 ° with respect to each other.
These support arms 1 are shifted from the center of rotation by 90 ° from 5 °.
An intermediate arm 16 is provided so as to extend between the support arms 5 and 15.
7, 17 are attached. And this rotor 1
2 is rotated along with the motor 13 and the speed reducer 18 (see FIG. 3), so that the stator 2 is arranged along the inner wall of the stator 11 and connected to the blood connection port 11a and the blood connection port 11b. When the pressed portion of the inner tube (not shown) moves with the rotation of the roller 17, the blood flowing through the tube is pushed out to the blood connection port (blood outlet) 11b, and the blood connection port ( New blood flows in from the blood inlet 11a.

A disk 20 is provided on the stator 11 so as to rotate integrally with the stator 11. As shown in FIGS. 2 and 5, a flat plate 21 is provided on the back surface of the casing 2 via a pin 22 so as to be rotatable in a direction orthogonal to the surface of the casing 2. Flat plate 21
On the upper side of the disk, a lock convex portion 21a can be engaged with the notches 20a and 20b provided in the disk 20, and as shown by a solid line in FIG. When the projections 21a are on the same plane, the projections 21a are engaged with the notches 20a and 20b. However, when the unlocking pin 24 penetrating the casing 2 is pushed and the flat plate 21 is displaced from the disc 20, The engagement of the projection 21a with the notches 20a, 20b is released. When the unlocking pin 24 is released, the flat plate 21 is returned to the original position integrally with the unlocking pin 24 by a spring (not shown), and the projection 21a is engaged with the notches 20a and 20b again. State.

The notches 20a, 20b of the disc 20
And the positions of the blood connection ports 11a and 11b attached to the stator 11 correspond to each other. That is, the notches 20a and 20b of the disc 20 are approximately 180
When the locking projection 21a of the flat plate is engaged with one of the notches 20a, as shown in FIG. 1 (a), the two blood connection ports 11a, 11b is disposed so as to face the left side with respect to the surface of the casing 2, and when the protrusion 21a engages with the cutout 20b on the other side, as shown in FIG. Are disposed so as to face the right side with respect to the surface of the casing 2. That is, the disk 20 and the flat plate 21 constitute a lock mechanism 25 that determines and holds the rotational position of the stator 11 at a predetermined position.

The lock mechanism 25 is provided with a limit switch 26. That is, as shown in FIG.
Limit switches 26a and 26b are fixed to the back side of the casing 2 and behind the locking projection 21a of the flat plate 21 (front side in FIG. 5) with a space left and right, and these limit switches 26a and 26b are , The disc 20
Are turned on and off individually by being pressed by cut-and-raised portions 27a and 27b at both ends of an arc plate 27 provided along the half-peripheral edge of. For example, as shown in FIG. 5, when the convex portion 21a of the flat plate 21 is engaged with the one concave portion 20a, one cut-and-raised portion 27a presses the right limit switch 26a in FIG. When the disk 20 is rotated 180 ° counterclockwise in FIG. 5 and the projection 21a of the flat plate 21 engages with the other recess 20b, the other cut-and-raised portion 27
b, the left limit switch 26b in FIG.
Is pressed.

On the other hand, the motor 13 assembled to the blood pump 14 has a structure capable of rotating forward and backward, and when one of the limit switches 26a and 26b is pressed, and the other limit switch 26b Is pressed, the rotation direction of the motor 13 is switched.

Next, the operation of the dialysis apparatus having the above configuration will be described. For example, as described in the prior art, when dialysis is performed on a patient on the left shunt using the bed 9 located on the left side of the dialysis apparatus, as shown in FIG. The tubes 8 connecting the tubes 8 have a relatively short length without crossing each other, and can constitute a blood circuit for returning the blood from the blood pump 3 to the patient via devices such as a dialyzer.

When dialysis is performed on a right shunt patient using the bed 9 located on the right side of the dialysis apparatus using this dialysis apparatus, as shown in FIG. Although various problems as described above have occurred, in this dialysis apparatus, the lock mechanism 25 is released, and the head of the blood pump 14 in which the stator 11 is incorporated is rotated by 180 degrees, and as shown in FIG. As shown in FIG. 4, the above problem can be solved by setting the directions of the blood connection ports 11a and 11b of the blood pump 14 so as to face right.

That is, the lock release pin 24 is pressed against a spring (not shown), and the flat plate 21 is shifted so as not to be located on the same plane as the disk 20 as shown by a two-dot chain line in FIG. The engagement of the portion 21a with the notch 20a is released. Then, the head of the blood pump 14 that has been freely rotated is rotated 180 degrees counterclockwise in FIG. As a result, the blood connection ports 11a, 11
b can be turned to the right. Thereafter, fine rotation adjustment of the head of the blood pump 14 is performed, the projection 21a of the flat plate 21 is set to a position corresponding to the notch 20a of the disk 20, and the pressing on the lock release pin 24 is released. Flat plate 21 with unlock pin by spring
Returns to a position on the same plane as the disk 20, and the projection 21a engages with the notch 20b. That is, the rotation of the blood pump 14 on the head side is regulated by the operation of the lock mechanism 25.

When the disc 20 is rotated integrally with the stator 11, one of the raised portions 27a of the arc plate 27 is formed.
Releases the pressing of the right limit switch 26a in FIG. 5, and the other cut-and-raised portion 27b
Is pressed on the left limit switch 26b. Thereby, the rotation of the motor 13 for driving the blood pump 14 is switched in the opposite direction.

Here, when the head side of the blood pump 14 is rotated by 180 °, as shown in FIG. 1 (b), one blood connection port 11a, which has been the blood inflow side, goes upward, The other blood connection port 11b on the blood outflow side
Are positioned below, but by switching the rotation of the motor 13, the inlet side and the outlet side of these blood connection ports are respectively switched, and the other lower blood connection port 11b is connected to the blood inflow side, One of the upper blood connection ports 11a is on the blood outflow side.

As described above, the motor 13 is automatically switched according to the rotation state of the head of the blood pump 14, so that the blood connection port located on the lower side of the blood pump 14 is always on the blood inflow side, and The blood connection port located on the side is always the blood outflow side. Therefore, as shown in FIG. 4, even when dialysis is performed on a patient on the right shunt using the bed 9 located on the right side of the dialysis device, the tubes 8 connecting the devices or the devices and the patient are mutually connected. With a relatively short length without crossing, a blood circuit that returns from the blood pump 3 to the patient via devices such as a dialyzer can be formed. In addition to this, it is clear from comparison with FIG. 9 that the operator can set the blood circuit in a normal state without hesitation about the insertion side of the tube, and can perform priming (physiological saline). (E.g., filling with water or the like), and at the same time, the occurrence of air accumulation around the blood pump 14 can be prevented.

<Modification of Embodiment of the Invention> In the embodiment of the invention, the circular plate 20 is provided with the circular plate 27,
The operation of switching the rotation of the motor 13 in the reverse direction is performed by detecting the rotation status of the cut-and-raised portions 27a and 27b at both ends of the arc plate 27 by the limit switches 26a and 26b, but is not limited thereto. Stator 11
A detecting means such as a limit switch is provided so as to face the motor, and the detecting means detects a rotation state of the stator 11 through a protrusion or a concave portion provided on the stator 11, and detects a rotation state of the motor 13 based on the detection signal. A configuration in which the rotation direction is switched may be adopted. In addition, by increasing the number of concave portions 20a and 20b provided in the disc 20, the blood connection ports 11a and 11b of the blood pump 14 are oriented rightward,
It is not limited to the leftward orientation, and can be fixed at any position (for example, diagonally lower left, right below, diagonally lower right, etc.).

[0022]

As described above, according to the present invention, the following excellent effects can be obtained. According to the dialysis apparatus of the first aspect, the stator of the blood pump is rotatably attached to the casing while keeping the axis of the rotor the same, so that the blood connection of the blood pump can be performed as necessary. You can change the direction of your mouth freely. For this reason, even if the dialysis device is arranged on the right or left side with respect to the bed on which the patient lies, or further on the bed head side,
Even when the patient is in the right shunt or the left shunt, there is no possibility that a problem such as disconnection of the connector or kink will occur without forming an unreasonable blood circuit. According to the dialysis device according to claim 2, since the detection means detects the rotation state of the stator of the blood pump and determines the rotation direction of the motor based on a detection signal issued from the detection means, for example,
Among the blood connection ports located above and below, the blood connection port located on the upper side can be defined as a blood outlet, and the blood connection port located on the lower side can be defined as a blood inlet, so that the operator of the dialysis device can connect the tube. The blood circuit can be set and primed without hesitation, and at the same time, air accumulation is less likely to occur. According to the dialysis device of the third aspect, since the lock mechanism for determining the rotation position of the stator at the predetermined position is provided, it is possible to prevent the stator of the blood pump from rotating carelessly during dialysis, and The rotational position of the pump can be accurately determined. According to the dialysis device of the fourth aspect, since the rotation lock mechanism is provided with the detection means, the number of components can be reduced by sharing the components, thereby reducing the cost and weight. Can be achieved.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a main part of an embodiment of a dialysis apparatus according to the present invention, wherein (a) is a front view of a certain situation, and (b) is a front view of the situation when the stator is rotated 180 ° from the situation. It is.

FIG. 2 is a rear view of a casing near the blood pump used in the embodiment.

FIG. 3 is a side view of a part of a blood pump and a casing used in the embodiment.

FIG. 4 is a plan view for explaining the operation of the embodiment.

FIG. 5 is a perspective view of the back surface side of the casing near the blood pump used in the embodiment.

FIG. 6 is a front view showing a conventional dialysis device.

FIG. 7 is a plan view showing an example of a blood circuit using the dialysis device.

FIG. 8 is a plan view showing an example of a blood circuit using the dialysis device.

FIG. 9 is a plan view showing an example of a blood circuit using the dialysis device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dialysis apparatus 2 Casing 11 Stator 12 Rotor 13 Motor 14 Blood pump 17 Roller 18 Reduction gear 20 Disc 20a, 20b Notch 21 Flat plate 21a Convex part 22 Pin 25 Lock mechanism 26a, 26b Limit switch (detection means) 27a, 27b Department

Claims (4)

[Claims] A blood pump including a motor, a stator arranged coaxially with each other, a rotor, and a motor for rotating the rotor is mounted on a casing so that the axis of the rotor is oriented in a horizontal direction. In a dialysis apparatus for feeding blood through a dialyzer for removing waste products, a stator of the blood pump is rotatable along a vertical plane while keeping the axis of the rotor the same with respect to the casing. A dialysis device, which is attached. 2. The blood pump motor has a structure capable of rotating forward and backward, and has a detecting means for detecting a rotation state of a stator of the blood pump and determining a rotation direction of the motor based on a detection signal thereof. The dialysis device according to claim 1, wherein 3. The blood pump according to claim 1, wherein a lock mechanism for determining a rotation position of the stator at a predetermined position is interposed between the device casing and a stator of the blood pump. Dialysis machine. 4. The dialysis apparatus according to claim 3, wherein said rotation lock mechanism is provided with said detection means.