JP5241337B2 - Roller pump and blood purification apparatus equipped with roller pump - Google Patents

Description

  The present invention relates to a roller pump for flowing a fluid in the flexible tube by compressing the flexible tube capable of flowing the fluid in the longitudinal direction while compressing the tube in the radial direction, and a blood purification device including the roller pump. It relates to the device.

  Generally, in dialysis treatment, a blood circuit composed of a flexible tube is used to circulate a patient's blood extracorporeally. This blood circuit is mainly composed of an arterial blood circuit in which an arterial puncture needle for collecting blood from a patient is attached to the tip, and a venous blood circuit in which a venous puncture needle for returning blood to the patient is attached to the tip. The dialyzer is interposed between the arterial blood circuit and the venous blood circuit to purify blood circulating outside the body.

  A part of the arterial blood circuit is connected to a flexible tube having a softer and larger diameter than the others, and such a part is attached to a ironing type blood pump (roller pump) disposed in the dialysis machine. It is configured as follows. As shown in FIGS. 13 and 14, the conventional blood pump sandwiches the stator 100 having the mounting recess 100a to which the flexible tube C can be attached and the flexible tube C attached to the mounting recess 100a. Clamping means 101, a rotor 102 that can be rotationally driven (rotated relative to the horizontal axis) in the mounting recess 100a by the driving force of the motor M, and a flexible tube C that is formed on the rotor 102 and compresses the flexible tube C However, it is mainly composed of a roller 103 in the longitudinal direction along with the rotation of the rotor 102.

The flexible tube C attached to the attachment recess 100a includes an ironing part C1 (center part) that is squeezed by the roller 103, and an inlet part C2 (lower part) that allows fluid to flow toward the ironing part C1. And an outlet part C3 (upper part) for allowing fluid to flow out from the ironing part C1, and other flexible tubes constituting the blood circuit are connected to the tips Ca and Cb, respectively ( There is no prior art document that discloses a blood pump having the same shape as that of FIGS. 13 and 14, but a similar shape is disclosed in, for example, Patent Document 1).
Japanese Patent Laid-Open No. 06-154310

  However, in the conventional blood pump (roller pump), for example, when the priming liquid such as physiological saline is driven to fill in the blood circuit at the time of priming and the priming liquid flows, There was a problem that air easily stayed at the inlet portion C2 and the outlet portion C3. If the air stays, work by the operator to remove the air is required separately, so workability during priming deteriorates and it is difficult to automate from the priming process to the treatment process. End up.

  The present invention has been made in view of such circumstances, and by suppressing the retention of air at the inlet portion and the outlet portion of the flexible tube, the workability at the time of priming is improved. An object of the present invention is to provide a roller pump and a blood purification apparatus including the roller pump that can easily automate the process to the treatment process.

The invention according to claim 1 is a stator provided with a mounting recess to which a flexible tube capable of allowing fluid to flow is attached, a rotor capable of being driven to rotate within the mounting recess, and the rotor formed on the rotor. A roller for causing fluid to flow in the flexible tube by squeezing the flexible tube attached to the recess in the longitudinal direction along with the rotation of the rotor while compressing the flexible tube in the radial direction. A roller having a squeezing portion in which a flexible tube attached to the recess is squeezed by the roller, an inlet portion for allowing fluid to flow toward the squeezing portion, and an outlet portion for allowing fluid to flow out from the squeezing portion In the pump, the stator can be attached with the flexible tube while the inlet portion and the outlet portion face upward with respect to the fluid flow direction. Parts are formed, and, together with the stator is arranged such that the rotor is driven to rotate about a horizontal axis, said attachment portion, the inlet portion and an outlet portion of the flexible tube moves away from the ironing portion The flexible tube is provided with an elastic force in a direction in which it is wound .

Those invention of claim 2, wherein, in the roller pump according to claim 1, wherein said attachment portion, the inlet portion and an outlet portion of the flexible tube to extend inclined approximately 20 to 40 ° to the horizontal plane It is characterized by being.

According to a third aspect of the invention, the roller pump according to claim 1, wherein said mounting portion is an inlet portion or outlet portion of the flexible tube is guided while gradually bending outward respectively, away from the ironing portion And extending in a direction away from each other.

According to a fourth aspect of the present invention, there is provided a stator having a mounting recess to which a flexible tube capable of flowing a fluid is attached, a rotor capable of being driven to rotate in the mounting recess, and the rotor formed on the rotor. A roller for causing fluid to flow in the flexible tube by squeezing the flexible tube attached to the recess in the longitudinal direction along with the rotation of the rotor while compressing the flexible tube in the radial direction. A roller having a squeezing portion in which a flexible tube attached to the recess is squeezed by the roller, an inlet portion for allowing fluid to flow toward the squeezing portion, and an outlet portion for allowing fluid to flow out from the squeezing portion In the blood purification apparatus provided with the pump, the roller pump has a stator in which the inlet portion and the outlet portion face upward with respect to the fluid flow direction. One said flexible tube attachable attachment portion is formed, and, together with the stator is arranged such that the rotor is driven to rotate about a horizontal axis, said attachment portion, said flexible tube The inlet portion and the outlet portion of the tube are extended in a direction away from the ironing portion, and the flexible tube is provided with an elastic force in a wound state. And

According to the first and fourth aspects of the invention, the stator is formed with the attachment portion to which the flexible tube can be attached while the inlet portion and the outlet portion are directed upward with respect to the fluid flow direction. By suppressing air from staying at the inlet and outlet of the flexible tube, workability during priming can be improved and automation from the priming process to the treatment process can be facilitated.

In addition , the stator is arranged so that the rotor is driven to rotate about a horizontal axis, and the attachment portion extends in a direction in which the inlet portion and the outlet portion of the flexible tube are separated from the ironing portion. Therefore, air can be prevented from staying at the inlet and outlet of the flexible tube, and maintenance of the rotor, adjustment of the roller, and the like can be easily performed.

  In other words, the attachment portion causes the inlet portion and the outlet portion of the flexible tube to extend away from the ironing portion, so that the separation dimension between the inlet portion and the outlet portion is wider than before. The adjustment work etc. can be easily performed by inserting a tool etc. with respect to a rotor or a roller from the widened separation part.

Furthermore , since the flexible tube is provided with an elastic force in a direction in which the flexible tube is wound, when the flexible tube is attached to the attachment recess, the inlet portion and the outlet portion are wound. An elastic force acts inward to return to the state, and the inlet portion and the outlet portion are firmly attached to the attachment portion by the elastic force.

  Therefore, the conventional clamping means becomes unnecessary, the configuration can be simplified and the number of parts can be reduced. Further, since the clamping means is not necessary, it is not necessary to extend the inlet part and the outlet part to the formation position of the clamping means as in the prior art. Therefore, the length of the flexible tube to be attached to the attachment recess can be shortened, and the raw material of the flexible tube can be reduced and the filling capacity (priming volume) of the flexible tube can be reduced.

According to the second aspect of the present invention, since the attachment portion is formed such that the inlet portion and the outlet portion of the flexible tube are inclined by approximately 20 to 40 ° with respect to the horizontal plane, the inlet portion and the outlet portion are provided. In this case, it is possible to more reliably suppress air from being retained.

According to the invention of claim 3 , the attachment portion guides the inlet portion or the outlet portion of the flexible tube while being gradually bent outward, and extends in a direction away from the ironing portion. Therefore, the inlet portion or the outlet portion of the flexible tube can be extended in a natural state with no load, and the flexible tube can be prevented from bending unnaturally.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
In the hemodialysis apparatus, the roller pump according to the present embodiment compresses the flexible tube constituting a part of the blood circuit for circulating blood extracorporeally in the longitudinal direction while handling (compressing) it in the longitudinal direction. The present invention is applied to a blood pump for flowing blood (the same applies to other fluids such as a priming liquid during priming) in the blood circuit. Hereinafter, a hemodialysis apparatus (including a blood circuit) to which the present blood pump is applied will be described.

  As shown in FIG. 1, the hemodialysis apparatus mainly includes a blood circuit 1 to which a dialyzer 2 is connected, and a dialyzer body 5 that removes water while supplying dialysate to the dialyzer 2. As shown in the figure, the blood circuit 1 is mainly composed of an arterial blood circuit 1a and a venous blood circuit 1b made of a flexible tube. The arterial blood circuit 1a and the venous blood circuit 1b A dialyzer 2 is connected between them.

  The dialyzer 2 is formed by housing a plurality of hollow fibers in which micropores (pores) are formed in a casing portion, and the blood inlet port 2a, blood outlet port 2b, dialysate inlet port are provided in the casing portion. 2c and dialysate outlet port 2d are formed, and the blood introduction port 2a is connected to the proximal end of the arterial blood circuit 1a, and the blood outlet port 2b is connected to the proximal end of the venous blood circuit 1b. Yes. The dialysate introduction port 2c and the dialysate lead-out port 2d are connected to a dialysate introduction line L1 and a dialysate discharge line L2 extending from the dialyzer body 5, respectively.

  An arterial puncture needle a is connected to the tip of the arterial blood circuit 1a, and an iron type blood pump 3 (roller pump) is disposed in the middle, while the venous blood circuit 1b includes A venous puncture needle b is connected to the tip, and a defoaming air trap chamber 4 is connected midway. When the blood pump 3 is driven while the patient is punctured with the arterial puncture needle a and the venous side puncture needle b, the blood of the patient reaches the dialyzer 2 through the arterial blood circuit 1a. After the blood purification, the air trap chamber 4 removes bubbles and returns to the patient's body through the venous blood circuit 1b. That is, the blood of the patient is purified by the dialyzer 2 while circulating outside the body by the blood circuit 1.

  In addition, a saline feed line L3 is connected in the middle of the arterial blood circuit 1a, and a saline bag 6 containing physiological saline is connected to the tip of the saline feed line L3. The saline feed line L3 is normally clamped by a clamping means (not shown) and the flow path is closed. However, when the priming, replacement fluid, or blood collection is performed, the clamping means is opened to open the saline eating line 6 The physiological saline is introduced into the blood circuit 1.

  On the other hand, as shown in FIG. 2, a flexible tube C that is softer and thicker than the others is connected to a part of the arterial blood circuit 1a, and the flexible tube C is connected to the dialyzer body 5. It is comprised so that it may attach to the blood pump 3 arrange | positioned. In addition, the code | symbol Ca and Cb in the figure has shown the connection part fixed to the both ends of the flexible tube C, and the flexible tube C which comprises the artery side blood circuit 1a to the said connection part Ca and Cb is shown. Each is connected.

  Here, as shown in FIGS. 3 and 4, the blood pump 3 according to this embodiment includes a stator 7, a rotor 8 that can be driven to rotate by driving a motor M, and a pair of rollers 9 formed on the rotor 8. And mounting portions 10a, 10b formed in a groove shape on the stator 7, and the stator 7 so that the rotation axis L1 of the rotor 8 becomes a horizontal axis (virtual axis extending in the horizontal direction with respect to the floor surface). Is arranged. That is, the blood pump 3 is attached with the upper surface 7c of the stator 7 facing upward and the lower surface 7d facing downward.

  The stator 7 is formed with an attachment recess 7a to which the flexible tube C is attached, and is configured such that the flexible tube C is attached along the inner peripheral wall surface forming the attachment recess 7a. A rotor 8 that can be driven to rotate about the rotation axis L1 by the motor M is disposed at the approximate center of the mounting recess 7a. A pair of rollers 9 is disposed on the side surface of the rotor 8 (the surface facing the inner peripheral wall surface of the mounting recess 7a).

  Reference numeral 8a in the figure denotes a guide pin made of a pin-like member that protrudes from the upper end side and the lower end side of the rotor 8 toward the inner peripheral wall surface of the mounting recess 7a, and is flexible between the guide pins 8a. The sex tube C is held. That is, when the rotor 8 is driven to rotate, the upper and lower guide pins 8a hold the flexible tube C in a normal position and are not detached from the mounting recess 7a. Note that a cover (not shown) is attached to the stator 7 so as to be freely opened and closed.

  The roller 9 compresses the flexible tube C attached to the attachment recess 7a in the radial direction while compressing the flexible tube C in the longitudinal direction (blood flow direction) with the rotation of the rotor 8, thereby allowing blood in the blood circuit 1 to flow. It can be made to flow. That is, when the flexible tube C is mounted in the mounting recess 7a and the rotor 8 is driven to rotate, the flexible tube C is compressed between the roller 9 and the inner peripheral wall surface of the mounting recess 7a. With the rotational drive of 8, the rotation direction (longitudinal direction) can be squeezed. Due to the ironing action, blood in the blood circuit 1 flows in the rotation direction of the rotor 8, so that the patient's blood can be circulated extracorporeally in the blood circuit 1.

  Thus, as shown in FIGS. 5 and 6, the flexible tube C attached to the attachment recess 7a causes the fluid to flow toward the ironing portion C1 and the ironing portion C1 to be ironed by the roller 9, as shown in FIGS. It has three parts, an inlet part C2 and an outlet part C3 that allows fluid to flow out from the ironing part C1, and the ironing part C1 is along the inner peripheral wall surface of the mounting recess 7a as described above. At the same time, the inlet portion C2 and the outlet portion C3 are attached to attachment portions 10a and 10b formed on the stator 7, respectively.

  The mounting portions 10a and 10b are formed in the flexible tube C while the inlet portion C2 and the outlet portion C3 are in a state in which the inlet portion C2 and the outlet portion C3 face upward with respect to the fluid flow direction (inclined upward from the horizontal plane with respect to the fluid flow direction). It is a part that can be attached. More specifically, the mounting portions 10a and 10b have a groove shape that extends from the peripheral portion of the mounting recess 7a of the stator 7 to the upper surface 7c and the lower surface 7d, and is open while facing the mounting recess 7a on the upper surface 7c and the lower surface 7d. .

  Thus, if the inlet portion C2 and the outlet portion C3 of the flexible tube C are attached along the groove shape (attachment portions 10a and 10b), the inlet portion C2 is directed toward the ironing portion C1 (see FIG. The outlet portion C3 is inclined upward (toward the middle right side), and the outlet portion C3 is inclined downward toward the ironing portion C1 side (toward the right side in the figure). In other words, the attachment portions 10a and 10 are attached so that the inlet portion C2 and the outlet portion C3 face upward with respect to the fluid flow direction.

  Further, since the mounting portions 10a and 10b have the above-described configuration, the direction in which the inlet portion C2 and the outlet portion C3 of the flexible tube C are separated from each other as they move away from the ironing portion C1 (toward the left in FIG. 5). (Approximate C-shape). Here, a notch 7b facing the mounting recess 7a is formed on a side surface of the stator 7 (a position where the conventional clamping means is formed), and the inlet C2 and the notch 7b are separated from each other. It is located between the outlet portions C3.

  The mounting portions 10a and 10b are formed with holding portions 10aa and 10ba having dimensions slightly narrower than the outer diameters of the inlet portion C2 and the outlet portion C3, respectively. The holding portions 10aa and 10ba include the inlet portion C2 and the outlet portion. The portion C3 is fitted and held so that the flexible tube C does not shift when the blood pump 3 is driven. Of course, the sandwiching portions 10aa and 10ba may not be formed.

  According to the above embodiment, for example, in priming before treatment (before puncturing the puncture needles a and b into the patient), the blood pump 3 is driven and physiological saline (priming solution) is fed from the saline bag 6 into the blood circuit 1. ), The inlet portion C2 and the outlet portion C3 of the flexible tube C are attached to the attachment portions 10a and 10b while facing upward with respect to the flow direction of the fluid (saline). Therefore, by suppressing the retention of air (bubbles) at the inlet portion C2 and the outlet portion C3 of the flexible tube C, workability at the time of priming is improved, and automation from the priming process to the treatment process is performed. Can be easily achieved.

  In addition, the stator 7 is disposed so that the rotor 8 rotates around a horizontal axis (rotation axis L1 horizontal to the floor surface), and the attachment portions 10a and 10b are the inlet portions of the flexible tube C. Since C2 and the outlet part C3 are extended in a direction away from the ironing part C1, the air stays at the inlet part C2 and the outlet part C3 of the flexible tube C as described above. In addition, the maintenance of the rotor 8 and the adjustment work of the roller 9 can be easily performed.

  That is, because the attachment portions 10a and 10b extend the inlet portion C2 and the outlet portion C3 of the flexible tube C in a direction away from the ironing portion C1, the inlet portion C2 and the outlet portion C3 As shown in FIG. 7, a tool T or the like is inserted into the rotor 8 or the roller 9 from the notch portion 7b formed in the widened separation portion, as shown in FIG. Thus, adjustment work (for example, discharge pressure adjustment work by adjusting the position of the roller 9) and the like can be easily performed.

  Furthermore, as shown in FIG. 8, the flexible tube C to be applied is preferably one in which an elastic force is applied in a wound state (direction indicated by an arrow in the drawing). Usually, since the flexible tube C is often transported and stored in a wound state, the flexible tube C has a so-called “wrapping” (a state in which an elastic force is applied in a direction of being wound). Yes. When such a flexible tube C is used, when the flexible tube C is attached to the attachment recess 7a, the inside of the inlet portion C2 and the outlet portion C3 is returned toward the inside (that is, inward). The elastic force acts in a direction close to each other, and the inlet portion C2 and the outlet portion C3 are pressed against the inner peripheral wall surfaces of the attachment portions 10a and 10b by the elastic force, respectively, and are firmly attached.

  Therefore, the conventional clamping means (see reference numeral 101 in FIGS. 13 and 14) is not required, and the configuration can be simplified and the number of parts can be reduced. Further, since the clamping means is not required, it is not necessary to extend the inlet part C2 and the outlet part C3 to the formation position of the clamping means as in the prior art. Therefore, the length of the flexible tube C to be attached to the attachment recess 7a can be shortened, and the raw material of the flexible tube C can be reduced and the filling capacity (priming volume) of the flexible tube C can be reduced. be able to.

  Furthermore, it is preferable that the attachment portions 10a and 10b are such that the inlet portion C2 and the outlet portion C3 of the flexible tube C extend so as to be inclined by approximately 10 to 60 ° with respect to the horizontal plane. More preferably, it is inclined and extended. However, if the inlet portion C2 and the outlet portion C3 of the flexible tube C are extended with an inclination of about 20 to 40 ° with respect to the horizontal plane, air will stay in the inlet portion C2 and the outlet portion C3. Can be more reliably suppressed.

  Here, instead of the mounting portion 10a, as shown in FIGS. 9 and 10, a guide portion 11 is provided for guiding the inlet portion C2 of the flexible tube C while gradually bending it outward (downward in the figure). The mounting portion 10a ′ may be extended in a direction in which the inlet portion C2 and the outlet portion C3 are separated from the ironing portion C1. Thereby, the inlet part C2 of the flexible tube C can be extended in a natural state with no load, and the flexible tube C can be prevented from bending unnaturally. In addition, you may comprise so that the said attaching part 10b side may also provide the guide part 11, and it guides, gradually bending the exit part C3 of the flexible tube C to the outer side (upper side in the figure).

  In addition, as described above, when the flexible tube C to be applied is applied with an elastic force in a direction in which the flexible tube C is wound (a direction indicated by an arrow in the drawing) as shown in FIG. Since the inlet portion C2 (or the outlet portion C3) to be displaced by the elastic force abuts along the guide portion 11, the flexible tube C is bent unnaturally, for example, in a V shape. It can be avoided reliably.

  Although the present embodiment has been described above, the present invention is not limited thereto. For example, as shown in FIGS. 11 and 12, the rotation axis L2 of the rotor 8 is a vertical axis (a virtual axis extending in a direction perpendicular to the floor surface). The blood pump 3 ′ in which the stator 7 is disposed may be used. In this case, the blood pump 3 ′ is attached with the front surface 7 e of the stator 7 facing upward.

  In the case where the stator 7 is disposed so that the rotation axis L2 of the rotor 8 is a vertical axis, the mounting portions 12a and 12b are used instead of the mounting portions 10a and 10b. The attachment portions 12a and 12b are flexible tubes while the inlet portion C2 and the outlet portion C3 are respectively facing upward with respect to the fluid flow direction (inclined upward from the horizontal plane with respect to the fluid flow direction). C is a part to which C can be attached, and more specifically, has a groove shape that extends from the peripheral edge of the mounting recess 7a of the stator 7 to one side surface and opens while facing the mounting recess 7a on the side surface.

  Thus, if the inlet portion C2 and the outlet portion C3 of the flexible tube C are attached along the groove shape (attachment portions 12a, 12b), the inlet portion C2 is inclined upward toward the ironing portion C1 side. In addition, the outlet portion C3 is inclined downward toward the ironing portion C1 side. In other words, the attachment portions 12a and 12 are attached so that the inlet portion C2 and the outlet portion C3 face upward with respect to the fluid flow direction.

  Similarly to the blood pump 3, the blood pump 3 ′ as described above is driven from the saline bag 6 by driving the blood pump 3 ′, for example, during priming before treatment (before puncturing the puncture needles a and b into the patient). When the physiological saline (priming solution) is introduced into the blood circuit 1, the inlet C2 and the outlet C3 of the flexible tube C are respectively oriented upward with respect to the fluid (saline) flow direction. However, since it is attached by the attachment parts 12a and 12b, the workability at the time of priming is suppressed by suppressing the retention of air (bubbles) at the inlet part C2 and the outlet part C3 of the flexible tube C. It is possible to easily improve the automation from the priming process to the treatment process.

Further, in this embodiment, is applied to a dialyzer which performs hemodialysis treatment, as long as it comprises a squeeze-type roller pump in the blood circuit for may a patient's blood is extracorporeally circulated, other It can also be applied to treatments (blood purification devices). In addition, it can apply not only to a blood pump but to the various roller pumps of another form, for example, the replacement fluid pump etc. which are used for a multi-use dialysis apparatus are mentioned.

An attachment portion to which a flexible tube can be attached while the inlet portion and the outlet portion are directed upward with respect to the fluid flow direction is formed , and the stator is driven to rotate about a horizontal axis. And the attachment portion extends in a direction in which the inlet portion and the outlet portion of the flexible tube move away from the ironing portion, and the flexible tube is in a wound state. As long as it is a roller pump having a stator to which an elastic force is applied in a certain direction , or a blood purification device having the roller pump, the one having a different external shape or having another function added, etc. Can be applied.

The schematic diagram which shows the dialysis apparatus with which the roller pump of this invention is applied. An enlarged schematic diagram showing a flexible tube attached to the roller pump Side view and front view showing the roller pump Perspective view showing the roller pump Side view and front view showing the roller pump (with a flexible tube attached) The perspective view which shows the roller pump (state which attached the flexible tube) Schematic diagram showing a state where adjustment work is performed by inserting a tool T or the like in the roller pump Schematic diagram showing a flexible tube attached to the roller pump and having an elastic force applied in a rolled state. Front view showing a roller pump according to another embodiment of the present invention. The front view which shows the roller pump (state which attached the flexible tube) which concerns on the other embodiment. The perspective view which shows the roller pump which concerns on other embodiment of this invention. The perspective view which shows the roller pump (state which attached the flexible tube) which concerns on other embodiment same as the above A perspective view showing a conventional roller pump Front view showing a conventional roller pump (with a flexible tube attached)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Blood circuit 1a Arterial blood circuit 1b Venous blood circuit 2 Dializer 3 Blood pump (roller pump)
4 Air Trap Chamber 5 Dialyzer Main Body 6 Saline Bag 7 Stator 8 Rotor 9 Roller 10a, 10b Mounting Portion 11 Guide Portion 12a, 12b Mounting Portion C Flexible Tube C1 Ironing Portion C2 Inlet Portion C3 Outlet Portion L1 Rotating Shaft (Horizontal Shaft) )
L2 rotation axis (vertical axis)

Claims (4)

A stator having a mounting recess to which a flexible tube capable of flowing fluid is mounted;
A rotor capable of being driven to rotate in the mounting recess;
For fluidizing the fluid in the flexible tube by compressing the flexible tube formed in the rotor and attached to the attachment recess in the longitudinal direction while compressing the flexible tube in the radial direction. Laura,
And a flexible tube attached to the attachment recess includes an ironing part that is squeezed by the roller, an inlet part that allows a fluid to flow toward the squeezing part, and a fluid that flows out from the ironing part. In a roller pump having an outlet portion,
The stator has an attachment portion to which the flexible tube can be attached while the inlet portion and the outlet portion are directed upward with respect to the fluid flow direction , and the rotor is centered on a horizontal axis. The stator is disposed so as to be rotationally driven, and the attachment portion extends in a direction in which the inlet portion and the outlet portion of the flexible tube move away from the ironing portion. A roller pump , wherein the flexible tube is provided with an elastic force in a direction in which it is wound . The mounting portion, the roller pump according to claim 1, wherein the inlet portion and an outlet portion of the flexible tube is characterized in that to extend inclined approximately 20 to 40 ° to the horizontal plane. The mounting portion is configured to guide the inlet portion or the outlet portion of the flexible tube while gradually bending outward, and to extend in a direction away from the ironing portion. Item 2. The roller pump according to Item 1 . A stator having a mounting recess to which a flexible tube capable of flowing fluid is mounted;
A rotor capable of being driven to rotate in the mounting recess;
For fluidizing the fluid in the flexible tube by compressing the flexible tube formed in the rotor and attached to the attachment recess in the longitudinal direction while compressing the flexible tube in the radial direction. Laura,
And a flexible tube attached to the attachment recess includes an ironing part that is squeezed by the roller, an inlet part that allows a fluid to flow toward the squeezing part, and a fluid that flows out from the ironing part. In a blood purification apparatus comprising a roller pump having an outlet portion,
The roller pump has an attachment portion to which the flexible tube can be attached while the stator is in a state in which the inlet portion and the outlet portion face upward with respect to the fluid flow direction , and the rotor The stator is disposed so as to rotate about a horizontal axis, and the attachment portion extends in a direction in which the inlet portion and the outlet portion of the flexible tube separate away from the ironing portion. A blood purification apparatus comprising a roller pump , wherein the flexible tube is provided with an elastic force in a direction in which the flexible tube is wound .

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