JP2019054831A - Extracorporeal circulation treatment device - Google Patents

Abstract

To prevent bubbles from being injected into a patient without using tube clamping means.SOLUTION: An extracorporeal circulation treatment device is provided that comprises: a device body including an arterial blood circuit and a venous blood circuit, and provided with a blood circuit for extracorporeally circulating patient's blood from the distal end of the arterial blood circuit to the distal end of the venous blood circuit; and a blood pump of a tube pump type for wiping a wiper part arranged in a portion of the arterial blood circuit, and causing the blood in the blood circuit to flow. The extracorporeal circulation treatment device further comprises: an arterial bubble detector arranged in the arterial blood circuit and monitoring an amount of cumulative bubbles; and a control unit controlling to stop the blood pump when the immixing of the bubbles in an amount equal to or more than a first predetermined value is detected by the arterial bubble detector.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an extracorporeal circulation treatment apparatus that performs treatment by circulating blood extracorporeally.

  Conventionally, hemodialysis apparatuses, hemofiltration apparatuses, hemodiafiltration apparatuses and the like exist as extracorporeal circulation treatment apparatuses that perform treatment by circulating the collected patient's blood extracorporeally. Here, as an extracorporeal circuit of a hemodialysis apparatus, for example, one disclosed in Patent Document 1 is known. This extracorporeal circuit uses a blood circuit consisting of a flexible tube. The blood circuit is an arterial blood circuit with an arterial puncture needle for collecting blood from the patient attached to the tip, and returns blood to the patient. Blood that circulates extracorporeally by interposing a dialyzer as a blood purification means between the arterial blood circuit and the venous blood circuit, and comprising a venous blood circuit with a venous puncture needle attached to the tip. Purifying.

  In this hemodialysis apparatus, after a priming process in which physiological saline is filled into the blood circuit, a blood removal process for introducing blood from the patient into the blood circuit before the dialysate is introduced into the dialyzer, A blood purification process for circulating the patient's blood extracorporeally in the blood circuit while introducing and discharging, and a blood return process for replacing the residual blood remaining in the blood circuit with physiological saline and returning the residual blood to the patient in sequence. It is configured so that it can be adjusted.

JP 2010-253130 A

  In the extracorporeal circulation circuit of the hemodialysis apparatus described above, a bubble detector and a tube clamp means are provided in the arterial blood circuit and the venous blood circuit, respectively, as safety devices that prevent air bubbles from being injected into the patient. However, since the actuator for driving the tube clamp means provided in the arterial blood circuit and the venous blood circuit is large and heavy, it is difficult to reduce the size and weight of the hemodialyzer. It was.

  An object of the present invention is to provide an extracorporeal circulation treatment device that can prevent air bubbles from being injected into a patient without using a tube clamping means.

  The extracorporeal circulation treatment device according to claim 1 includes an arterial blood circuit and a venous blood circuit, and a blood circuit that extracorporeally circulates patient blood from the distal end of the arterial blood circuit to the distal end of the venous blood circuit. An extracorporeal circulation treatment device comprising: a device main body; and a tube pump type blood pump for squeezing a squeezing portion disposed in a part of the arterial blood circuit to flow blood in the blood circuit. An arterial-side bubble detector disposed in the arterial-side blood circuit for monitoring a cumulative amount of bubbles, and the blood pump when the arterial-side bubble detector detects a bubble amount equal to or greater than a first predetermined value. And a control unit that performs control to stop the operation.

  The extracorporeal circulation treatment device according to claim 2 is the extracorporeal circulation treatment device according to claim 1, wherein when the control to stop the blood pump is performed, a state where any part of the ironing portion is blocked is ensured. The closed state security means is provided.

  The extracorporeal circulation treatment device according to claim 3 is the extracorporeal circulation treatment device according to claim 2, wherein the obstruction state securing means ensures that any portion of the ironing portion is obstructed at least during patient connection. To do.

  The extracorporeal circulation treatment device according to claim 4 is the extracorporeal circulation treatment device according to any one of claims 1 to 3, further comprising a vein-side bubble detector that is disposed in the vein-side blood circuit and detects bubbles. And the control unit performs control to stop the blood pump when the amount of bubbles equal to or greater than a second predetermined value is detected by the vein-side bubble detector.

  The extracorporeal circulation treatment apparatus according to claim 5 is the extracorporeal circulation treatment apparatus according to any one of claims 1 to 4, wherein the blood pump is controlled by a sensor that detects a driving state of the blood pump and the control unit. After performing the control to stop, when the sensor detects that the blood pump is being driven, the driving power source of the blood pump is turned off.

  The extracorporeal circulation treatment device according to claim 6 is the extracorporeal circulation treatment device according to any one of claims 1 to 5, wherein the blood pump includes the ironing portion set between a tube pressing portion and a finger. The finger pump is a finger pump.

  The extracorporeal circulation treatment device according to claim 7 is the extracorporeal circulation treatment device according to any one of claims 1 to 5, wherein the blood pump includes the ironing portion set between a tube pressing portion and a roller. The roller is a squeezing roller pump.

  The extracorporeal circulation treatment device according to claim 8 is the extracorporeal circulation treatment device according to claim 6 or 7, wherein the closed state ensuring means presses the tube pressing portion against the ironing portion under the control of the control portion. By securing the position, the closed state is secured.

  The extracorporeal circulation treatment device according to claim 9 is the extracorporeal circulation treatment device according to claim 6 or 7, wherein the closed state securing means closes the lid that covers the tube pressing portion and the ironing portion under the control of the control portion. And fixing means for fixing in a state of being attached.

  According to the first aspect of the present invention, the amount of air bubbles accumulated in the arterial blood circuit is monitored by the arterial air bubble detector disposed in the arterial blood circuit, and the amount of air bubbles greater than or equal to the first predetermined value is monitored. In order to stop the flow of blood in the blood circuit by the control unit when the control unit detects that air bubbles are detected, air bubbles are injected into the patient without using tube clamp means. Can be prevented.

  According to the second aspect of the present invention, when the control for stopping the blood pump is performed by the blocking state securing means, it is ensured that any part of the squeezing unit is blocked. It is possible to reliably prevent air bubbles from being injected into the patient by releasing the closed state.

  According to the third aspect of the present invention, the closed state securing means secures the state in which any part of the ironing portion is closed at least during the patient connection, thereby reliably preventing air bubbles from being injected into the patient. can do.

  According to the fourth aspect of the present invention, the bubble is detected by the venous-side bubble detector disposed in the venous-side blood circuit, and the blood is detected by the control unit when the amount of bubbles exceeding the second predetermined value is detected. Since the pump is controlled to stop, it is possible to reliably prevent bubbles from being injected into the patient.

  According to the fifth aspect of the present invention, when it is detected that the blood pump is being driven by the sensor after performing the control to stop the blood pump by the control unit, the driving power of the blood pump is turned off, Since the driving of the blood pump is forcibly stopped, air bubbles can be reliably prevented from being injected into the patient.

  According to the sixth aspect of the present invention, when the blood pump is a finger pump in which the squeezing part set between the tube pressing part and the finger is a squeezing finger pump, air bubbles are reliably prevented from being injected into the patient. Can do.

  According to the seventh aspect of the present invention, it is possible to reliably prevent air bubbles from being injected into a patient when the blood pump is a roller pump that uses a roller for the ironing portion set between the tube pressing portion and the roller. Can do.

  According to the invention described in claim 8, since the closed state securing means secures the closed state by fixing the tube pressing portion to the position pressed against the ironed portion under the control of the control unit, the manual operation is performed. Since the closed state of the part cannot be released, air bubbles can be reliably prevented from being injected into the patient.

  According to the ninth aspect of the present invention, since the closed state securing means includes the fixing means for fixing the cover that covers the tube pressing part and the ironing part under the control of the control part, the ironing part of the ironing part is manually operated. Since the closed state cannot be released, air bubbles can be reliably prevented from being injected into the patient.

It is a figure showing the whole hemodialysis apparatus concerning an embodiment. It is a figure which shows the internal structure of the apparatus main body which concerns on embodiment. It is a figure which shows the system configuration | structure of the hemodialysis apparatus which concerns on embodiment. It is a flowchart which shows the process of the hemodialysis in the hemodialysis apparatus which concerns on embodiment. It is a flowchart which shows the bubble detection process in the hemodialysis which concerns on embodiment.

  Hereinafter, a hemodialysis apparatus that is an extracorporeal circulation treatment apparatus according to an embodiment will be described with reference to the drawings. As shown in FIG. 1, the hemodialysis apparatus 2 is mainly composed of a blood circuit 6 to which a dialyzer 4 as blood purification means is connected, and an apparatus main body 7 for removing water while supplying dialysate to the dialyzer 4. As shown in the figure, the blood circuit 6 is mainly composed of an arterial blood circuit 6a and a venous blood circuit 6b made of flexible tubes. The arterial blood circuit 6a and the venous blood circuit 6b A dialyzer 4 is connected between them.

  A connector c is formed at the tip of the arterial blood circuit 6a, and an arterial puncture needle a is connected via the connector c. A tube pump type blood pump (hereinafter referred to as a blood pump) 8 is disposed in the middle of the arterial blood circuit 6a as a blood pump. Here, the blood pump 8 sets the squeezing part 9 disposed in a part of the arterial blood circuit 6a between the plate-like tube pressing part 8a and the finger 8b, and squeezes the squeezing part 9 with the finger 8b. The blood inside the blood circuit 6 flows. Further, an arterial bubble detector 10 is disposed on the distal end side (near the connector c) of the arterial blood circuit 6a. Here, the arterial bubble detector 10 is for monitoring the accumulated amount of bubbles so that a large amount of bubbles (bubble amount equal to or greater than the first predetermined value) does not enter the blood circuit 6. Further, a priming solution supply line L4 is connected between the blood pump 8 of the artery side blood circuit 6a and the artery side bubble detector 10, and physiological saline (priming solution) is accommodated via the clamping means K. The accommodating means 12 is connected.

  A connector d is formed at the tip of the venous blood circuit 6b, and a venous puncture needle b is connected via the connector d. Further, a venous drip chamber 14 for defoaming is connected in the middle of the venous blood circuit 6b. Furthermore, a venous-side bubble detector 16 for detecting a bubble amount equal to or greater than a second predetermined value is disposed on the distal end side (near the connector d) of the venous-side blood circuit 6b.

  Here, the bubbles detected by the arterial-side bubble detector 10 are a large amount of bubbles (the amount of bubbles above the first predetermined position), and a single minute bubble (second predetermined bubble) detected by the vein-side bubble detector 16. The amount of bubbles above the position is not detected by the arterial bubble detector 10. That is, the amount of bubbles above the first predetermined position detected by the artery-side bubble detector 10 is detected even though the bubbles are detected by the vein-side bubble detector 16 and the blood pump 8 is stopped, as will be described in detail later. The amount of air bubbles that are injected into the body due to the expansion of the accumulated air (in this embodiment, 27 cc, for example, the amount of air bubbles of 27 cc or more, or a collection of 270 0.1 cc bubbles, etc. ). On the other hand, the amount of bubbles above the second predetermined position detected by the venous-side bubble detector 16 is the amount of bubbles that should not be injected into the patient, and is an extremely small amount of bubbles compared to the aforementioned 27 cc. .

  The dialyzer 4 is formed with a blood introduction port 4a, a blood outlet port 4b, a dialysate inlet port 4c, and a dialysate outlet port 4d in the casing, and the blood inlet port 4a has a proximal end of the arterial blood circuit 6a. However, the proximal end of the venous blood circuit 6b is connected to the blood outlet port 4b. The dialysate introduction port 4c and the dialysate lead-out port 4d are connected to a dialysate introduction line L1 and a dialysate discharge line L2 extending from the apparatus main body 7, respectively.

  A plurality of hollow fibers are accommodated in the dialyzer 4, the inside of the hollow fibers is used as a blood flow path, and the flow of dialysate is between the hollow fiber outer peripheral surface and the inner peripheral surface of the housing. It is considered a road. The hollow fiber is composed of a hollow fiber membrane in which a large number of minute holes (pores) penetrating the outer peripheral surface and the inner peripheral surface are formed, and impurities and the like in the blood enter the dialysate through the membrane. It is configured to be transmissive.

  As shown in FIG. 2, the apparatus main body 7 is connected to the dual pump 20 formed across the dialysate introduction line L1 and the dialysate discharge line L2, bypassing the dual pump 20 in the dialysate discharge line L2. It is mainly composed of a bypass line L3 and a water removal pump 22 connected to the bypass line L3. One end of the dialysate introduction line L1 is connected to the dialyzer 4 (dialyte introduction port 4c), and the other end is connected to a dialysate supply device 24 for preparing a dialysate having a predetermined concentration.

  One end of the dialysate discharge line L2 is connected to the dialyzer 4 (dialysate outlet port 4d), and the other end is connected to a drainage means (not shown). After the liquid reaches the dialyzer 4 through the dialysate introduction line L1, the liquid is sent to the drainage means through the dialysate discharge line L2 and the bypass line L3.

  The dewatering pump 22 is for removing water from the blood of the patient flowing through the dialyzer 4. That is, when the dewatering pump 22 is driven, since the duplex pump 20 is a fixed type, the volume of liquid discharged from the dialysate discharge line L2 is larger than the amount of dialysate introduced from the dialysate introduction line L1. Thus, water is removed (dehydrated) from the blood by the large volume.

  The control unit 26 arranged in the apparatus main body 7 is constituted by a microcomputer or the like, and as shown in FIG. 3, each step in the arterial side bubble detector 10, the venous side bubble detector 16, and hemodialysis. An input unit 28 for inputting a start instruction, a pump driving unit 30 for driving the blood pump 8, a tube pressing unit driving unit 32 for driving the tube pressing unit 8a of the blood pump 8, and an alarm unit 34 for generating an alarm when a bubble is detected. Is connected.

  Next, hemodialysis using the hemodialysis apparatus 2 according to this embodiment will be described with reference to the flowchart shown in FIG. First, the ironing portion 9 disposed in a part of the arterial blood circuit 6a is set between the tube pressing portion 8a and the finger 8b of the blood pump 8. When a pressing instruction for the ironing section 9 is given by the input section 28, the control section 26 controls the tube pressing section driving section 32 to move the tube pressing section 8a in the direction of the finger 8b and press the pressing section 9; The closed state is secured by fixing the tube pressing portion 8a at that position (step S10). In this state, the operator cannot manually release the tube pressing portion 8a.

  That is, the release of the fixing of the tube pressing portion 8a is prohibited until the end of each step in hemodialysis, and after the end of each step of the hemodialysis as described later, an instruction to release the fixing of the tube pressing portion 8a is given from the input portion 28. Fixing is released. Therefore, in the hemodialysis apparatus 2, the tube pressing part 8a, the finger 8b, the control part 26, and the tube pressing part driving part 32 function as a closed state securing means that secures a state where any part of the ironing part is closed, While the tube pressing part 8a is fixed, the blockage of any part of the ironing part 9 is ensured.

  When an instruction to start the priming process is input from the input unit 28, the control unit 26 starts processing of the priming process (step S11). Here, the priming step refers to a step of filling the priming solution into the blood circuit 6 and the dialyzer 4, and the connector c at the distal end of the arterial blood circuit 6a and the connector d at the distal end of the venous blood circuit 6b are connected and closed. This is performed by forming the blood circuit 6. In this state, the blood pump 8 is driven while releasing the blockage by the clamp means K and the priming liquid supply line L4 is opened, so that the physiological circuit (priming liquid) in the storage means 12 is filled into the blood circuit 6.

  After the completion of the priming process, when an instruction to start the blood removal process is input through the input unit 28, the control unit 26 starts the blood removal process (step S12). In the blood removal step, puncture needles (arterial puncture needle a and venous puncture needle b) are attached to the distal end of arterial blood circuit 6a and venous blood circuit 6b, and the puncture needle is attached to patient shunt C. In this step, the blood pump 8 is driven before blood is supplied to the dialysate flow path of the dialyzer 4 to introduce blood from the patient into the blood circuit 6. That is, the blood removal step refers to a step of introducing the patient's blood into the blood circuit 6 before the blood purification step, and refers to a state in which dialysate is not supplied into the dialyzer 4 (a state where the dual pump 20 is stopped). .

  When the blood purification process start instruction is input by the input unit 28 after the blood removal process is completed, the control unit 26 starts the blood purification process (step S13). In the blood purification step, the blood pump 8 is driven while maintaining the state where the puncture needles (arterial puncture needle a and venous puncture needle b) have been punctured into the patient, and the dialysate is supplied to the dialyzer 4 (water removal pump). The blood circuit 6 causes the patient's blood to circulate extracorporeally while the blood circuit 22 is driven. That is, the blood purification step refers to a step of purifying the patient's blood by the dialyzer 4 while circulating it outside the blood circuit 6 and removing water by the water removal pump 22.

  After the blood purification process is completed, when an instruction to start the blood return process is input from the input unit 28, the control unit 26 starts processing of the blood return process (step S14). The blood return step is a step of replacing the residual blood remaining in the dialyzer 4 and the blood circuit 6 with physiological saline and returning the residual blood to the patient. The occlusion by the clamping means K is released and the priming liquid supply line L4 is connected. The blood pump 8 is driven while being opened, the residual blood remaining in the dialyzer 4 and the blood circuit 6 is replaced with physiological saline, and the residual blood is returned to the patient.

  After completion of the blood return process, the arterial puncture needle a and the venous puncture needle b are removed from the patient. Then, when an instruction to release the fixation of the tube presser 8a is given by the input unit 28, the control unit 26 controls the tube presser drive unit 32 to move the tube presser 8a in the direction away from the finger 8b. The fixing of the part 8a is released (step S15).

  Therefore, in the hemodialysis apparatus 2 according to this embodiment, the tube presser part of the blood pump 8 is fixed at the position where the tube presser part 8a of the blood pump 8 is pressed against the ironing part 9 in step S10, and then the tube presser part of the blood pump 8 in step S15. The arterial puncture needle a connected to the distal end of the arterial blood circuit 6a and the venous puncture needle connected to the distal end of the venous blood circuit 6b until the fixation of 8a is released, that is, at least being connected to the patient Between the time when the patient punctures b and the time when the artery side puncture needle a and the vein side puncture needle b are withdrawn from the patient, any portion of the ironing part 9 constituting the blood pump 8 is blocked. Secured.

  In the hemodialysis according to this embodiment, the blood circuit is operated by the arterial bubble detector 10 and the venous bubble detector 16 during the period from when the artery side puncture needle a and the vein side puncture needle b are punctured to when the needle is removed. The bubbles in 6 are detected. That is, as shown in the flowchart of FIG. 5, first, the arterial bubble detector 10 monitors the accumulated amount of bubbles so that a large amount of bubbles (the amount of bubbles greater than the first predetermined value) does not enter the arterial blood circuit 6a. It performs (step S20). In this hemodialysis apparatus 2, the blood pump 8 monitors the venous-side bubble detector 16 to monitor the arterial-side bubble detector 10 so that a large amount of bubbles (the amount of bubbles larger than the first predetermined value) is not mixed. Therefore, when there is a bubble accumulated between the blood pump 8 and the venous bubble detector 16, for example, bubbles mixed in the arterial blood circuit 6 a are transferred from the blood pump 8 to the venous bubble. This is because when the pressure is accumulated between the detectors 16, the pressure is released and may expand and be injected into the patient. Therefore, in order to eliminate the possibility that air bubbles accumulated between the blood pump 8 and the venous-side air bubble detector 16 exist, a large amount of air bubbles (the amount of air bubbles greater than the first predetermined value) is mixed in the blood circuit 6. The accumulated air bubble amount is monitored by the arterial air bubble detector 10 so that it does not occur.

The allowable amount of bubbles can be calculated under the condition that when the accumulated air pressure is released, the priming volume from the venous bubble detector 16 to the patient is not exceeded. For example, if the accumulated pressure is venous pressure maximum value 500 mmHg (= 0.66 atm) and the priming volume is 18 cc, the allowable air bubble amount A is from Boyle's law (PV = constant) A * 1.66 = (A + 18) * 1 A = 27 cc can be calculated.

  When the arterial bubble detector 10 does not detect the amount of bubbles equal to or greater than the first predetermined value (step S20: NO), the processing in each step of hemodialysis is continued. When the amount of bubbles equal to or greater than the predetermined value is detected (step S21: YES), the control unit 26 issues a bubble detection alarm in the alarm unit 34 (step S22). Then, the control unit 26 controls the pump driving unit 30 to stop the blood pump 8 (step S23). In this case, the blood pump 8 stops in a state where any portion of the ironing portion 9 is closed by the tube pressing portion 8a and the finger 8b, and the blood flow in the blood circuit 6 is stopped. Therefore, as long as the tube pressing portion 8a is not released, the blood pump 8 is in a stopped state instead of the tube clamping means, so that bubbles are injected into the patient without using the tube clamping means for closing the blood circuit 6. Can be prevented.

  When the arterial-side bubble detector 10 detects a bubble amount equal to or greater than the first predetermined value (step S20: YES), the control unit 26 issues a large-volume bubble detection alarm in the alarm unit 34 (step S24). . Then, the control unit 26 controls the pump driving unit 30 to stop the blood pump 8 (step S23). Even in this case, the blood pump 8 stops in a state where any portion of the ironing portion 9 is blocked by the tube pressing portion 8a and the finger 8b, and the blood flow in the blood circuit 6 is stopped. Since the stop state of the blood pump 8 is an alternative to the tube clamp means, it is possible to prevent air bubbles from being injected into the patient without using the tube clamp means for closing the blood circuit 6.

  In the above-described embodiment, a finger pump is used as the tube pump 8, and the tube pressing portion 8a, the finger 8b, the control portion 26, and the tube pressing portion driving portion 32 are functioned as a closed state securing means. That is, while the patient is connected, the closed state of the ironing portion 9 by the tube pressing portion 8a and the finger 8b can be released only by driving the tube pressing portion driving portion 32 by the control portion 26, but the closed state is secured. It is not limited.

  For example, a lock mechanism is provided for fixing the tube pressing portion 8a under the control of the control unit 26 in a state where any portion of the ironing portion 9 is closed by pressing the tube pressing portion 8a against the finger 8b. It may be possible to secure the closed state by fixing the portion 8a and to release the closed state of the ironing portion 9 by the tube pressing portion 8a and the finger 8b only by releasing the lock of the lock mechanism by the control unit 26. In this case, the tube pressing part 8a, the finger 8b, the lock mechanism, and the control part 26 function as a closed state securing means.

  Further, a lid that covers the tube pressing portion 8a and the finger 8b and a motor that drives the lid by the control of the control unit 26 are provided, and the motor and the control unit 26 function as fixing means, and the motor is driven only by the control unit 26. You may make it open | close a lid | cover and ensure the obstruction | occlusion state of the ironing part 9 by the tube pressing part 8a and the finger 8b. In this case, the tube pressing part 8a, the finger 8b, the lid, the motor and the control part 26 function as a closed state securing means.

  In addition, a lid that covers the tube pressing portion 8a and the finger 8b and a lock mechanism that locks the lid under the control of the control unit 26 are provided. The lock mechanism and the control unit 26 function as fixing means, and the control unit 26 locks the lock mechanism. When the cover is released, the lid may be opened, and the closed state of the ironing portion 9 by the tube pressing portion 8a and the finger 8b may be secured. In this case, the tube pressing part 8a, the finger 8b, the lid, the lock mechanism, and the control part 26 function as a closed state securing means.

  In the above-described embodiment, a finger pump is used as the tube pump 8. However, a stator (tube pressing portion) for setting the ironing portion 9 connected to a part of the arterial blood circuit 6a, and a set on the stator are set. A roller pump provided with the squeezing unit 9 and a squeezing roller may be used. When a roller pump is used here, for example, a cover that covers the stator and the roller and a lock mechanism that locks the cover under the control of the control unit 26 are provided, and the lock mechanism and the control unit 26 function as a fixing unit. Thus, when the lock mechanism is unlocked, the lid can be opened to secure the closed state of the ironing portion 9 by the stator and the roller. In this case, the stator, the roller, the lid, the lock mechanism, and the control unit 26 function as a closed state securing means.

  In addition, a lid that covers the stator and the roller and a motor that drives the lid under the control of the control unit 26 are provided. The motor and the control unit 26 function as a fixing means, and the lid can be opened only by driving the motor by the control unit 26. As above, the closed state of the ironing portion 9 by the stator and the roller may be secured. In this case, the stator, the roller, the lid, the motor, and the control unit 26 function as a closed state securing means.

  Moreover, in the roller pump which drives a motor by control by the control part 26, moves a stator to a roller direction, and obstruct | occludes any part of the ironing part 9 with a stator and a roller, either of the ironing part 9 by a stator and a roller In a state where the portion is closed, the stator is fixed by the control of the control unit 26 to secure the closed state of the ironing unit 9, and the motor is driven by the control unit 26 so that the ironing unit 9 using the stator and the roller is secured. It may be possible to release the closed state. In this case, the stator, the roller, the motor, and the control unit 26 function as a closed state securing means.

  Further, by driving the motor by the control of the control unit 26, the stator is moved in the roller direction, and the position of the stator is controlled by the control of the control unit 26 in a state where any part of the ironing unit 9 is closed by the stator and the roller. A locking mechanism for locking is provided, and the position of the stator is locked by the locking mechanism, so that the closed state of the ironing portion 9 is ensured, and the ironing portion by the stator and the roller is only released by the controller 26 unlocking the locking mechanism. 9 may be releasable. In this case, the stator, the roller, the lock mechanism, and the control unit 26 function as the closed state securing means.

  In the above-described embodiment, a sensor for detecting the driving state of the blood pump 8 is provided, and the amount of bubbles equal to or greater than the first predetermined value is detected by the artery-side bubble detector 10, or the vein-side bubble detector 16 When it is detected that the blood pump 8 is being driven by the sensor after the amount of bubbles equal to or more than a predetermined value is detected and the control unit 26 performs control to stop the blood pump 8, When the control signal output to the drive unit 30 is not received by the pump drive unit 30 or when the blood pump 8 does not stop due to a failure of the pump drive unit 30, the drive power supply of the blood pump 8 is turned off. May be. By comprising in this way, the inflow of the bubble to a patient can be prevented reliably.

  In the above-described embodiment, a so-called double needle composed of an arterial puncture needle a and a venous puncture needle b is used as the puncture needle, but the tip of the arterial blood circuit 6a and the vein are formed from one puncture needle. A so-called single needle puncture needle connected to the distal end of the side blood circuit 6b may be used.

  In the above-described embodiment, the present invention is applied to the hemodialysis apparatus 2 used at the time of dialysis treatment. However, other blood purification apparatuses that can purify the patient's blood while circulating outside the body (for example, blood filtration dialysis apparatus) , Blood filtration devices, etc.).

2 ... hemodialysis device, 4 ... dialyzer (blood purification means), 6 ... blood circuit, 6a ... arterial blood circuit, 6b ... vein side blood circuit, 7 ... device body, 8 ... blood pump, 8a ... tube presser, 8 ... Finger, 9 ... Ironing part, 10 ... Arterial side bubble detector, 12 ... Accommodating means, 14 ... Venous side drip chamber, 16 ... Venous side bubble detector, 26 ... Control part, 28 ... Input part, 30 ... Pump Drive part 32 ... Tube presser part drive part 34 ... Alarm part L1 ... Dialysate introduction line L2 ... Dialysate discharge line L3 ... Bypass line L4 ... Priming liquid supply line K ... Clamping means

Claims (9)

An apparatus main body including an arterial blood circuit and a venous blood circuit, and a blood circuit that extracorporeally circulates patient blood from the distal end of the arterial blood circuit to the distal end of the venous blood circuit;
A tube pump type blood pump for squeezing a squeezing portion disposed in a part of the arterial blood circuit to flow blood in the blood circuit;
An extracorporeal circulation treatment device comprising:
An arterial bubble detector disposed in the arterial blood circuit for monitoring the amount of accumulated bubbles;
A control unit that performs control to stop the blood pump when the amount of bubbles of a first predetermined value or more is detected by the artery-side bubble detector;
An extracorporeal circulation treatment device comprising:   The extracorporeal circulation treatment device according to claim 1, further comprising: a closed state securing means that secures a state where any part of the ironing portion is closed when performing control to stop the blood pump.   The extracorporeal circulation treatment device according to claim 2, wherein the blockage state securing means secures a state in which any part of the ironing unit is blocked at least during patient connection. A venous-side bubble detector that is disposed in the venous-side blood circuit and detects bubbles;
The extracorporeal body according to any one of claims 1 to 3, wherein the control unit performs control to stop the blood pump when the amount of bubbles of a second predetermined value or more is detected by the vein-side bubble detector. Circulatory treatment device. A sensor for detecting a driving state of the blood pump;
The drive power of the blood pump is turned off when it is detected that the blood pump is being driven by the sensor after performing the control for stopping the blood pump by the control unit. The extracorporeal circulation treatment device according to any one of the above.   The extracorporeal circulation treatment device according to any one of claims 1 to 5, wherein the blood pump is a finger pump in which the ironing portion set between a tube pressing portion and a finger is ironed by the finger.   The extracorporeal circulation treatment device according to any one of claims 1 to 5, wherein the blood pump is a roller pump that uses the roller to squeeze the ironing portion set between a tube pressing portion and a roller.   The extracorporeal circulation treatment device according to claim 6 or 7, wherein the closed state securing means secures the closed state by fixing the tube pressing portion to a position pressed against the ironing portion under the control of the control unit.   The extracorporeal circulation treatment device according to claim 6 or 7, wherein the closed state securing unit includes a fixing unit configured to fix the tube pressing unit and the cover that covers the ironing unit in a closed state under the control of the control unit.

Images