JP4802534B2 - Medical roller pump and blood extracorporeal treatment device - Google Patents

Description

  The present invention relates to a medical roller pump and a blood extracorporeal treatment apparatus.

  In the medical field, a part of the patient's blood is once taken out of the body, and various blood extracorporeal treatments such as purification and oxygenation are performed on the derived blood, and then this blood is returned to the patient's body again. May be processed. As an example of such a process, there is a hemodialysis (HD) process for a person with renal function disease or an artificial cardiopulmonary process in cardiovascular surgery. Among these, the hemodialysis treatment is to remove waste products (for example, urine toxic substances) and water from blood led out of the patient's body or to correct various components in the blood.

  For hemodialysis treatment, a disposable blood circuit, a dialyzer (dialyzer) attached to the blood circuit, and the patient's blood are circulated while being controlled based on various conditions in the blood circuit. A hemodialysis system including a console is used. The console is equipped with a blood pump for transferring the blood in the blood circuit. In consideration of safety, the blood pump handles the outside of the tube in the blood circuit with the rotor and the housing. A roller pump that can perform blood transfer in a different manner is used.

By the way, when setting the blood circuit to the console or returning the blood remaining in the blood circuit to the patient at the final stage of dialysis treatment (returning blood collection), the roller pump may require a reverse function. is there. However, during normal dialysis processing, etc., it is necessary to ensure the safety by preventing the reverse rotation of the roller pump. For this reason, as a method of satisfying these two requirements, for example, a reverse rotation prevention mechanism in a roller pump can be attached and detached, and the reverse rotation prevention mechanism is functioned during normal dialysis processing. A technique relating to a roller pump (see Patent Document 1) has been proposed that enables reverse rotation while securing safety by removing the reverse rotation prevention mechanism from the pump body when the reverse rotation is required.
JP 2004-60590 A

  However, in the conventional techniques including the above-mentioned Patent Document 1, it has been difficult to realize a roller pump that can be reversely operated without complicated work and that can ensure high safety. . For example, in a conventional roller pump that does not include a reverse rotation prevention mechanism, for example, when the roller pump is manually rotated, the safety of the patient is left to the attention of the nurse who is the operator. Specifically, when an unexpected situation such as a power outage occurs during hemodialysis, the nurse must manually rotate the roller pump to continue the process. Leave a problem from the viewpoint of ensuring safety.

  In addition, the roller pump according to Patent Document 1 is provided with a reverse rotation prevention mechanism, so that safety is ensured at the time of steady dialysis treatment, but, for example, when the blood circuit is set, the roller pump is slightly changed. Even when the rotor is rotated in the reverse direction, the reverse rotation prevention mechanism must be removed from the main body each time, and the operation becomes very complicated. For this reason, a problem is left from the viewpoint of swiftness when processing is urgently executed.

  The present invention has been made to solve the above-described problem, and can switch the rotation direction without complicated work, and reliably rotate the rotation direction when the user manually rotates the rotation direction. It is an object of the present invention to provide a medical roller pump that can be regulated and a blood extracorporeal treatment apparatus including the roller pump.

  In order to achieve the above-mentioned object, the present invention compresses a part of an elastic tube in which a flow path for liquid such as blood is formed inward and deforms it from the outside. A pump that moves the liquid in the liquid flow path by moving the area along the liquid flow path, and a squeezing unit that moves the compressed area by rotation while squeezing a partial area of the elastic tube; A rotational power source that supplies rotational power to the pressing unit, a rotating operation unit that is rotated by a user such as a nurse, and a rotating operation to the rotating operation unit, only one-way rotating operation is transmitted to the pressing unit. The first transmission unit that performs the transmission, the second transmission unit that transmits the rotational operation in both directions to the rotary operation unit, and the transmission that selectively switches between the first transmission unit and the second transmission unit by the user's selection operation. And a switching unit.

  A blood extracorporeal treatment apparatus according to the present invention includes the medical roller pump according to the present invention.

  The roller pump of the medical roller pump and the blood extracorporeal treatment apparatus according to the present invention includes a first transmission unit, a second transmission unit, and a transmission switching unit. For this reason, when a 1st transmission part is selected by the user's selection operation to a transmission switching part, only rotation operation of one direction of rotation operation to a rotation operation part is transmitted to a pressing part. Become. On the other hand, when the second transmission unit is selected by the user's selection operation to the transmission switching unit, the bi-directional rotation operation to the rotation operation unit is transmitted to the pressing unit. That is, in the medical roller pump according to the present invention and the roller pump of the blood extracorporeal processing apparatus, when the user selects the second transmission unit with respect to the transmission switching unit, the squeezing unit and the rotation operation unit are moved by the second transmission unit. It will rotate in the same direction. For this reason, in this state, the squeezing unit can be rotated in both forward and reverse directions according to a rotation operation performed on the rotation operation unit by the user. Therefore, in the medical roller pump and the blood extracorporeal treatment apparatus according to the present invention, for example, when a tube portion such as a blood circuit is attached to the pump, an operation of slightly reversing the pressing portion is possible.

  Further, for example, when the blood extracorporeal treatment apparatus according to the present invention is applied to execution of hemodialysis processing or the like, no user selection operation is required when the blood return processing is performed automatically, that is, using a rotational power source. is there. Further, when a user such as a nurse manually executes the blood return process, the process can be executed with a simple operation in which the user simply selects the second transmission unit. For this reason, in the medical roller pump and the blood extracorporeal treatment apparatus including the medical roller pump according to the present invention, squeezing of blood return or the like is performed without performing the complicated work of removing the reverse rotation prevention mechanism as in the pump according to Patent Document 1. A process involving reverse rotation of the unit can be executed.

  On the other hand, when the user performs an operation of selecting the first transmission unit with respect to the transmission switching unit, only the rotation operation is transmitted to the squeezing unit in one direction among the rotation operations to the rotation operation unit. The pressing unit is prevented from rotating in a direction not intended by the user. For this reason, when a user selects the 1st transmission part and rotates a pressing part using a rotation operation part, even if a rotation operation part is rotated in the wrong direction, a pressing part rotates in conjunction. Patient safety is ensured. For example, when a power failure or the like occurs during the hemodialysis process and the nurse manually rotates the squeezing unit via the rotary operation unit, the first transmission unit is selected. It is suppressed that a pressing part rotates in an undesired direction, and high safety is ensured also in such a case.

In the medical roller pump and the blood extracorporeal treatment apparatus according to the present invention, the first transmission unit and the second transmission unit can be alternatively selected only by the user's selection operation from the transmission switching unit. The reverse rotation of the squeezing portion in a state in which safety is ensured is possible without the complicated work of removing the reverse rotation prevention mechanism one by one as in the technique according to 1.
Therefore, in the medical roller pump and the blood extracorporeal treatment apparatus according to the present invention, the rotation direction can be switched without complicated operations, and the rotation direction can be reliably ensured when the user manually rotates the rotation direction. Regulation is possible.

  In the medical roller pump and the blood extracorporeal treatment apparatus according to the present invention, the specific first transmission unit includes a ratchet or a one-way clutch, and the specific second transmission unit is integrally connected to the squeezing unit. And a configuration including an engagement operation tool capable of engaging between the rotation operation unit and the rotation body as the transmission switching unit. In this case, the first transmission unit is selected when the engagement between the rotation operation unit and the rotating body is released by the user's selection operation, and the rotation operation unit and the rotating body are engaged. The second transmission unit is selected at a certain time.

  More specifically, the engagement operation tool is a lock pin, which is attached to an operation handle that is configured to be foldable in the rotation operation portion, and has an engagement hole that can receive the lock pin in the rotating body. It is possible to adopt a configuration that is provided. When such a configuration is adopted, the operation handle is folded, and when the lock pin is inserted through the engagement hole, the rotation operation unit and the rotating body are engaged, and the operation handle is deployed. When the lock pin is detached from the engagement hole, the rotation operation unit and the rotating body are brought into a disengaged state, and the above effect can be obtained with a simple configuration. That is, by adopting a configuration in which the lock pin is attached to the operation handle, when the operation part is to be manually rotated, the one-way clutch that is always the first transmission part when the operation handle is opened. Will be selected. For this reason, in this structure, a pressing part cannot be reversely rotated by rotation operation by an operation handle.

  Further, in the medical roller pump and the blood extracorporeal treatment apparatus including the medical roller pump according to the present invention, it is further ensured that the rotation detecting unit for detecting the rotation direction is connected to the pressing unit. It is desirable from the viewpoint of. This is by electrically monitoring the rotation direction of the squeezing unit, thereby checking the control command against the direction in which the squeezing unit is actually rotating, and whether the squeezing unit is rotating in the normal direction. Can be confirmed. For this reason, when adopting the configuration, even if the user manually rotates the rotation operation unit with the second transmission means selected by the user, the rotation detection unit performs monitoring of the rotation direction, thereby allowing the user to It can be made to grasp, and it can be constituted so that a warning may be issued to a user. In addition, in the said structure, connection with a pressing part and a rotation detection part may be direct, for example, the state which interposed the gear head, the rotational power source, etc. in between may be sufficient.

Further, in the medical roller pump and the blood extracorporeal treatment apparatus including the medical roller pump according to the present invention, the squeezing unit and the rotational power source are connected in a state where the rotational operation in both directions is transmitted, and a specific rotation detecting unit It is also possible to employ a magnetic field detection element incorporated in the rotational power source.
Furthermore, in the blood extracorporeal treatment apparatus according to the present invention, as a specific configuration, an input receiving unit that outputs an output of a rotation operation instruction to the rotational power source and receives information on the rotation direction from the rotation detection unit, and a user The information providing unit that provides information to the display by means of at least one of display on the screen and sound notification, and drive control based on the input information from the input receiving unit, and the information providing unit It is possible to employ a configuration in which a control unit that instructs the user to provide information is provided. In this case, the control unit has predetermined input information related to the rotation direction from the rotation direction detection unit. It is also possible to perform control such that an instruction to issue a warning regarding the rotation direction to the user is output to the information providing unit when it is opposite to the direction. When adopting such a configuration, as described above, by electrically monitoring the rotation direction of the squeezing unit, the control command and the direction in which the squeezing unit is actually rotating are collated, and the rotation direction of the squeezing unit It can be confirmed whether or not is normal.

  Further, in the blood extracorporeal treatment apparatus according to the present invention, a purification unit for purifying blood is inserted in a blood circuit to be mounted, and blood is guided from the patient by the pumping action of the roller pump in the apparatus to be in the blood flow path. When the processing operation for returning the blood to the patient after passing through the purification unit is set as the specified operation, the control unit issues a warning to the user when the compression unit is input from the rotation direction detection unit It is desirable to configure so that the rotation direction is opposite to a preset direction of blood transfer. This is for the following reason.

  In the hemodialysis treatment, blood is usually derived from a patient, transferred through a blood circuit, and returned to the patient's body after passing through a purification unit. For this reason, in the normal hemodialysis process, the squeezing part of the roller pump cannot be rotated in the reverse direction. Therefore, it is appropriate to issue an alarm when the impossible operation occurs as in the blood extracorporeal treatment apparatus according to the present invention.

In the following, the best mode for carrying out the present invention will be described with reference to a hemodialysis system as an example, and its configuration, action and effect. In addition, the form provided for the following description shows an example of the present invention, and the present invention is not limited to this except for the main feature described above, and can be appropriately replaced. It is.
1. Configuration of Hemodialysis System 1 The configuration of the hemodialysis system 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a front view showing the main configuration of the hemodialysis system 1.

  As shown in FIG. 1, a hemodialysis system 1 includes a dialysis monitoring device (hereinafter referred to as “console”) 10 and a blood circuit in which a part of the dialysis monitoring device 1 is mounted on a panel surface of a housing 100 of the console 10. 20, a dialyzer (hereinafter referred to as “dialyzer”) connected to the blood circuit 20, an isotonic solution bag 501, a drug syringe 601, and the like. Although not shown, the dial 10 supply unit and the drainage processing unit are connected to the console 10.

The console 10 includes an input panel 101 serving as an input receiving unit, a display panel 102 serving as an information display unit, and an alarm lamp 103 on the panel surface of the housing 100. The board surface of the housing 100 is also provided with a roller pump 104 for transferring blood in the blood circuit 20 and a drug injection pressurizing unit 105 for sending the drug from the drug syringe 601.
Furthermore, although not shown in FIG. 1, a control unit that executes drive control related to dialysis is provided inside the console 10.

The blood circuit 20 is a disposable circuit and includes a plurality of tubes 201 to 205 and 207, a vein chamber 206, puncture needles ND _A and ND _V , and the like. The tubes 201 to 205 and 207 are made of an elastic material, and the inner tube 203 is set on the roller pump 104. The dialyzer 30 is set between the tube 204 and the tube 205 in the blood circuit 20.

  The dialyzer 30 contains a large number of thin tubes (about 10,000 hollow fibers) in the dialyzer main body 300, and blood from the tube 204 flows into the tube 205 through the hollow fibers. The hollow fiber is composed of a dialysis membrane and has pores through which only water molecules and extremely fine substances pass. The dialyzer main body 300 is provided with two connectors 301 and 302, to which a dialysate supply tube 401 and a dialysate recovery tube 402 are connected.

  The isotonic solution bag 501 contains an isotonic solution (for example, physiological saline) to be supplied into the blood circuit 20 at the start of dialysis, and is stored in the blood circuit 20 via the tube 502. The blood circuit 20 can be supplied from between the tube 201 and the tube 202. The drug cylinder 601 is pre-filled with a drug such as heparin, and can be supplied into the circuit 20 from between the tube 202 and the tube 203 in the blood circuit 20 by the tube 602 connected to the luer part. ing.

2. Hemodialysis treatment using the hemodialysis system 1 The hemodialysis treatment using the hemodialysis system 1 having the above-described configuration is performed as follows.
The puncture needles ND _A and ND _V are punctured at a predetermined position of a shunt provided in advance in the patient 70. Then, the blood derived from the patient 70 by the driving of the roller pump 104 in the console 10 is transferred in the order of the tube 201, the tube 202, the tube 203, and the tube 204 and passes through the dialyzer 30, and then the tube 205 and the vein chamber 206. and it returned to the patient from the puncture needle ND _V through the tube 207.

In the dialyzer 30, blood flows from the top to the bottom in the X-axis direction of FIG. 1, whereas the dialysate flows from the bottom to the top. Then, wastes and water in the blood, and further supply components are exchanged through the pores of the hollow fiber in the dialyzer 30.
At the end of the hemodialysis process, the nurse operates the roller pump 104 and the blood circuit 20 to return the blood in the tubes 201 to 204 of the blood circuit 20 to the patient. Here, in recent years, an apparatus that performs blood return based on a program set in a control unit of the console 10 has also been developed.

3. Configuration of Roller Pump 104 Next, the configuration of the roller pump 104, which is a main characteristic part of the hemodialysis system 1 according to the present embodiment, will be described with reference to FIGS. 2 is an external perspective view showing the roller pump 104, and FIG. 3 is a partial sectional view and a developed sectional view.
As shown in FIG. 2, the roller pump 104 includes a handle block 1041 serving as a rotation operation unit, a plate 1042 disposed near the lower portion thereof as a rotating pair, a housing 1043 serving as a side wall when the tube 203 is handled, A gear 1044 and a motor 1045 are attached to the lower part of the housing 1043. Here, although omitted in FIG. 2, the motor 1045 (or the gear 1044) has a rotation detection unit (for example, a magnetic field detection element incorporated in the motor 1045) for detecting the rotation direction and the number of rotations. (Applicable) is connected, and the detection data relating to the rotation direction and the rotation speed is output to the control unit.

As shown in FIG. 3A, the roller pump 104 has a rotor 1046 in a state where the roller pump 104 is housed in a concave portion of the housing 1043 below the plate 1042. The rotor 1046 has a function of squeezing a partial region of the tube 203 between the rotor 1043 and moving the squeezed region along a flow path inside the tube 203.
A one-way clutch 1047 provided for joining between the rotor shaft portion 1046c and the handle block 1041 is provided inside the handle block 1041. The one-way clutch 1047 is for transmitting only the rotation operation in one direction to the plate 1042 when the user performs the rotation operation on the handle block 1041.

As shown in FIG. 2, the handle block 1041 is provided at the top of the block main body 1041b, and can be opened and closed. The handle base 1041a can be opened and closed, and the handle base is provided at the base of the block main body 1041b. Part 1041c.
As shown in FIG. 3A, the handle block 1041 also has a lock pin portion 1041d that stands in the vicinity of the end of the operation handle portion 1041a and extends in the direction of the plate 1042 with the operation handle portion 1041a closed. The rotor 1046 includes a rotor main body 1046a, a plurality of roller portions 1046b provided on the outer circumferential portion, and a rotor shaft portion 1046c provided so as to enter the inner portion of the handle block 1041.

When the tube 203 in the blood circuit 20 is mounted, a partial region is squeezed between the roller portion 1046b and the inner wall of the housing 1043. As the rotor 1046 rotates, the squeezing region moves, and the blood in the tube 203 is transferred by this handling action.
As shown in FIG. 3B, the operation handle portion 1041a in the handle block 1041 is attached to the hinge of the block main body portion 1041b with the lock pin portion 1041d inserted through the through hole 1041h. The block body 1041b has a recess 1041g formed inwardly from its lower surface, and a one-way clutch 1047 is attached to the recess 1041g.

  The rotor shaft portion 1046c of the rotor 1046 is inserted into the hole portion 1047h at the center portion of the one-way clutch 1047. When the handle block 1041, the one-way clutch 1047, and the rotor 1046 are assembled and the operation handle portion 1041a is in the closed state, the distal end portion of the lock pin portion 1041d of the handle block 1041 is inserted into the hole 1042h of the plate 1042. It becomes a state.

Further, when the operation handle portion 1041a is in the unfolded state, the lock pin portion 1041d is detached from the hole 1042h of the plate 1042.
4). Driving of Roller Pump 104 The driving mode of the roller pump 104 will be described with reference to FIG. 3A and FIGS.

4-1. First, a drive mode of the roller pump 104 when the operation handle portion 1041a of the handle block 1041 is closed with respect to the block main body portion 1041b will be described.
As shown in FIG. 3A, the operation handle 1041a is closed with respect to the block main body 1041b, that is, the tip of the lock pin 1041d is inserted through the through hole 1041h of the block main body 1041b and the hole 1042h of the plate 1042. In this state, the handle block 104 and the plate 1042 have the same rotational direction. In other words, in this state, the user's rotational operation applied to the handle block 1041 is transmitted to the plate 1042 and the roller 1046 in both the forward and reverse directions, and as shown in FIG. With the user's operation on 1041, both directions of direction rotA and direction rotB can be taken.

  The rotation of the rotor 1046 in both directions rotA and rotB by the user's operation on the handle block 1041 can be considered, for example, when the tube 203 of the blood circuit 20 is set on the console 10. During the actual dialysis treatment, the cover (not shown) provided so as to cover the outside of the roller pump 104 is closed, so that the operation handle portion 1041a is closed. .

  As shown in FIG. 6A, when the operation handle portion 1041a is in the closed state, the handle block 1041 and the plate 1042 are directly engaged by inserting the lock pin portion 1041d into the hole 1042h of the plate 1042. The one-way clutch 1047 inserted in the meantime does not fulfill its function of restricting the rotational direction in one direction. Even in this state, the user can rotate the rotor 1046 using the block main body 1041b, but it is difficult to think of continuing the operation for a long time, and such an operation is performed for a long time, such as during a power failure. I can't think of that. Further, as described above, the rotation detection unit 1049 is connected to the motor 1045 (or the gear 1044), and the rotation direction is monitored, and the rotor 1046 is rotated in reverse by a manual operation by mistake. No such situation can occur. A method for ensuring electrical safety will be described later.

  Note that the motor 1045 and the rotor 1046 are connected to each other via a gear 1044, and the rotor 1046 rotates in the same direction as the motor 1045. At the end of the hemodialysis process, the motor 1045 rotates in the direction rotB based on an instruction from the control unit, and accordingly, the rotor 1046 also rotates in the direction rotB. Thereby, in the hemodialysis system 1, the blood return collection process at the time of completion | finish of a dialysis process is performed.

4-2. Next, a driving mode of the roller pump 104 when the operating handle portion 141a is open with respect to the block main body portion 1041b will be described.
As shown in FIG. 5B, when the operation handle portion 1041a is in the unfolded state, the user can grasp the operation handle portion 1041a and manually rotate the handle block 1041. In this state, as shown in FIG. 6B, the handle block 1041 and the plate 1042 are connected only by a route via the one-way clutch 1047. That is, in this state, the one-way clutch 1047 functions as a transmission unit.

  As shown in FIG. 5A, in this state, when the user rotates the operation handle portion 1041a toward the one direction rotA, the one-way clutch 1047 plate the rotation operation of the user from the handle block 1041. 1042, the rotor 1046 that is directly connected to the plate 1042 rotates in the same direction as the handle block 1041.

  On the other hand, in this state, if the user accidentally rotates the operation handle portion 1041a in the direction opposite to the direction rotA, the one-way clutch 1047 rotates idly, and the rotation operation of the user from the handle block 1041 is not performed. There is no transmission to the plate 1042. Therefore, in this case, no matter how much the user rotates the handle block 1041, the rotor 1046 does not rotate.

As described above, when the operation handle portion 1041a is in the open state, the rotor 1046 rotates only in one direction rotA in the same direction as the handle block 1041, and blood flows back in the hemodialysis system 1. Thus, the rotation of the rotor 1046 in the opposite direction is prevented.
As a situation where the user manually rotates the rotor 1046 with the operation handle 1041a in the open state in this way, for example, due to an unexpected situation such as a power failure when the patient is already performing hemodialysis There may be a case where the nurse 10 rotates the rotor 1046 manually in an emergency when the motor 1045 stops operating. In the hemodialysis system 1 according to the present embodiment, since the medical roller pump 104 having the function of preventing reverse rotation during manual operation is used as described above, the operation handle is also used in the case of an emergency as described above. It is possible to manually rotate the rotor 1046 only by opening the portion 1041a, and the reverse rotation is reliably suppressed against erroneous operation, so that high safety is ensured.

5. Configuration Regarding Monitoring of Driving of Roller Pump 104 in Hemodialysis System 1 Hereinafter, a configuration regarding monitoring of driving of the roller pump 104 included in the hemodialysis system 1 according to the present embodiment will be described with reference to FIG. FIG. 7 is a partial configuration block diagram showing a part relating to the drive monitoring of the roller pump 104 in the configuration of the hemodialysis system 1.

  As shown in FIG. 7, the hemodialysis system 1 according to the present embodiment is provided with a backup power supply 80 as a system, and when the power supply from the commercial power supply is interrupted (during a power failure), the console 10 The control power supply is backed up by the control unit 106 or the like. The control unit 106 is provided with means for recognizing the state when the power supply from the commercial power supply is interrupted.

  The control unit 106 in the console 10 is connected to a drive data storage unit 107 that stores preset drive data. In addition, as described above, the input panel 101, the display panel 102, the warning lamp 103, and the buzzer 108 are connected to the control unit 106. In the console 10, the display panel 102, the warning light 103, and the buzzer 108 are provided as components that provide various information to the user.

A motor driver 1048 for driving the motor 1045 of the roller pump 104 is connected to the motor pump 1048. The motor driver 1048 is connected to the control unit 106 and receives a drive instruction signal related to driving of the motor 1045. The drive of 1045 is executed.
The motor 1045 is connected to a rotation detection unit 1049 for detecting the rotation direction and the number of rotations, and a detection signal from the rotation detection unit 1049 is input to the control unit 106.

  In the hemodialysis system 1 configured as described above, the control unit 106 refers to the drive data stored in the drive data storage unit 107 based on the instruction content input by the user through the input panel 101, and sends a motor to the motor driver 1048. A signal related to driving of 1045 is output. The motor driver 1045 that has received this signal drives the motor 1045 to rotate based on the content of the instruction signal from the control unit 106. Then, the rotation detection unit 1049 connected to the motor 1045 feeds back a detection signal regarding the rotation direction and the number of rotations of the motor 1045 to the control unit 106.

  In an emergency such as a power failure, the control unit 106 notifies the user of information related to the rotation stop of the motor 1045 via the display panel 102 and the warning lamp 103 while receiving power supply from the backup power supply 80. Then, a nurse or the like opens the operation handle portion 1041a of the roller pump 104 as shown in FIG. 5A, and manually rotates the rotor 1046 to continue the hemodialysis process. At this time, as shown in FIG. 5B, the rotor 1046, the gear 1044, and the motor 1045 are in a state in which the rotation shafts are connected. Therefore, even in manual rotation, the rotation direction and the number of rotations are determined by the rotation detection unit 1049. As a result, the feedback to the control unit 106 is maintained.

  In the hemodialysis system 1 according to the present embodiment, even in the case of an emergency such as a power failure as described above, when the operation handle portion 1041a is manually opened and rotated as described above, the operation handle portion 1041a is erroneously set. Even if it is rotated in the reverse direction, the rotor 1046 does not rotate in the reverse direction, and safety is ensured. Even if a nurse or the like directly rotates the block main body 1041b without opening the operation handle 1041a, as shown in FIG. 7, it is based on the detection information of the rotation detector 1049. Since the rotation direction and the number of rotations of the rotor 1046 are monitored, high safety is ensured. For example, when the control unit 106 determines that the rotor 1046 of the roller pump 104 is rotating in reverse based on input information from the rotation detection unit 1049, the control unit 106 uses the display panel 102, the warning lamp 103, and the buzzer 108. Alerts nurses and patients.

  As described above, the hemodialysis system 1 according to the present embodiment has a configuration in which the rotor 1046 in the roller pump 104 can be reversely rotated, for example, when the blood circuit 20 is set, as shown in FIGS. By adopting the structure of the roller pump 104, it is possible to reliably prevent the reverse rotation when the user manually rotates the rotor 1046 in an emergency or the like. Further, as shown in FIG. 7, the motor 1045 or the like in the roller pump 104 is connected to a rotation detection unit 1049 for detecting the rotation direction and the number of rotations, and the signal is input to the control unit 106. Thus, when the user manually rotates the rotor 1046 while the operation handle portion 1041a of the roller pump 104 is in the closed state, the user can be surely made aware of the state related to the rotation of the rotor 1046. Therefore, in the hemodialysis system 1, secure safety is ensured also from this viewpoint.

In the present embodiment, as described above, the rotation detection unit 1049 can detect the rotation direction of the rotor 1046 even when driven by the backup power source 80 at the time of a power failure. The function concerning is not necessary.
(Other matters)
In the above-described embodiment, the configuration of the present invention and the features of the operational effects have been described by taking the hemodialysis system as an example, but the present invention is not limited to these configurations except for the essential features. For example, the roller pump according to the present invention can be applied to a system other than the hemodialysis system 1, for example, a system for performing an artificial heart-lung process, for medical use. Thus, even when the roller pump according to the present invention is applied to a system other than hemodialysis, the same effects as those of the above-described embodiment can be obtained.

  In the above embodiment, the one-way clutch 1047 is used as a transmission unit between the handle block 1041 that is the rotation operation unit of the roller pump 104 and the rotor 1046 that is the compression unit. As long as it can be limited to this, it is also possible to employ other things. For example, a ratchet or the like can be employed. In the above embodiment, the lock pin portion 1041d of the handle block 1041 is detached from the hole 1042h of the plate 1042 by opening the operation handle portion 1041a, and the engagement state between the handle block 1041 and the plate 1042 is released. However, the transmission switching unit between the case where the rotation direction is restricted to one direction and the case where there is no restriction is not limited thereto. For example, instead of the operation handle portion 1041a, a sliding lever may be employed, and when this is pulled out from the block main body portion 1041b, the rotation direction of the rotor 1046 may be limited to one direction.

  In addition, a push pin protrudes from the upper surface portion of the block main body 1041b, and the handle block 1041 and the plate 1042 are in a disengaged state (a state in which the engagement is released) when the user does not perform a selection operation. The handle block 1041 and the plate 1042 can be engaged when the user pushes the push pin. That is, the push pin on the block main body 1041b is elastically biased in a direction to be removed from the hole 1042h of the plate 1042, and is configured to be inserted into the hole 1042h by performing a selection operation of being pushed by the user. It is something that can be done.

  INDUSTRIAL APPLICABILITY The present invention is effective in realizing a medical roller pump that requires both work speed and reliable safety, and a blood extracorporeal treatment apparatus including the roller pump.

1 is a front view schematically showing a hemodialysis system 1 according to an embodiment. 2 is an external perspective view showing a roller pump 104 mounted on the console 10. FIG. (A) is a partial cross-sectional view of the roller pump 104, and (b) is a developed cross-sectional view showing the connection relationship between the handle block 1041, the plate 1042 and the rotor 1046 in the roller pump 104. It is a model top view which shows the rotation direction of the rotor 1046 when the operation handle part 1041a is made into a closed state. (A) is a schematic cross-sectional view showing a rotatable direction of the rotor 1046 when the operation handle portion 1041a is in an open state, and (b) is a handle block 1041 and a plate when the operation handle portion 1041a is in an open state. 10 is a cross-sectional view showing a connection relationship with 1042. FIG. (A) is a schematic diagram which shows the connection relationship of each structure of the roller pump 104 when the operation handle part 1041a of the handle block 1041 is closed, (b) is the operation handle part 1041a opened. It is a schematic diagram which shows the connection relation of each structure of the roller pump 104 at the time. FIG. 3 is a configuration block diagram showing a part relating to driving monitoring of the roller pump 104 in the configuration of the hemodialysis system 1.

Explanation of symbols

1. Hemodialysis system 10. Console 20. Blood circuit 30. Dialyzer 80. Backup power supply 100. Housing 101. Input panel 102. Display panel 103. Warning light 104. Roller pump 105. Drug injection pressure unit 106. Control unit 107. Drive data storage unit 108. Buzzers 201-205, 207, 401, 402, 502, 602. Tube 206. Venous chamber 300. Dializer body 301, 302. Connector 501. Isotonic solution bag 601. Drug syringe 1041. Handle block 1042. Plate 1043. Housing 1044. Gear 1045. Motor 1046. Rotor 1047. One-way clutch 1048. Motor driver 1049. Rotation detectors ND _A , ND _V. Puncture needle

Claims (10)

With respect to the elastic tube in which the liquid flow path is formed inward, a part of the area is compressed and deformed from the outside, and the compressed area is moved along the liquid flow path. A medical roller pump for flowing a liquid in a liquid flow path,
A plurality of rollers on the outer circumferential portion of the rotor body , and a rotatable rotor;
A housing having a gap between each of the plurality of rollers and a housing wall provided opposite to the circumferential surface of the rotor;
A rotational power source for supplying rotational power to the rotor;
A rotation operation unit that is rotated by a user;
A first transmission unit that is a ratchet or a one-way clutch, and transmits only one-way rotation operation to the rotor among the rotation operations to the rotation operation unit;
A plate integrally connected to the rotor, a second transmission unit transmitting a rotational operation in both directions to the rotational operation unit to the rotor;
A transmission switching unit that selectively switches the first transmission unit and the second transmission unit by the user's selection operation;
The transmission switching unit includes an engagement operation tool capable of engaging between the rotation operation unit and the plate,
When the engagement between the rotation operation unit and the plate is in a released state, the first transmission unit is selected,
When the rotation operation unit and the plate are in an engaged state, the second transmission unit is selected,
The medical roller pump, wherein the partial region of the elastic tube is squeezed between the roller and the housing wall as the rotor rotates. The engagement operation tool is a lock pin, and is attached to an operation handle configured to be foldable in the rotation operation unit,
The plate has an engagement hole that can receive the lock pin,
The rotation operation portion and the plate are engaged when the lock pin is inserted into the engagement hole when the operation handle is folded and when the operation handle is unfolded. The medical roller pump according to claim 1, wherein the lock pin is released from the engagement hole to be disengaged. The medical roller pump according to claim 1, wherein a rotation detection unit for detecting a rotation direction of the rotor is connected to the rotor. The rotor and the rotational power source are connected in a state where rotational motion in both directions is transmitted,
The medical roller pump according to claim 3, wherein the rotation detection unit is a magnetic field detection element incorporated in the rotational power source. With respect to the elastic tube in which the blood flow path is formed inward, a part of the area is squeezed and deformed from the outside, and the compressed area is moved along the blood flow path. A blood extracorporeal treatment apparatus comprising a roller pump for flowing blood in a blood flow path,
The roller pump is
A plurality of rollers on the outer circumferential portion of the rotor body , and a rotatable rotor;
A housing having a gap between each of the plurality of rollers and a housing wall provided opposite to the circumferential surface of the rotor;
A rotational power source for supplying rotational power to the rotor;
A rotation operation unit that is rotated by a user;
A first transmission unit that is a ratchet or a one-way clutch, and transmits only one-way rotation operation to the rotor among the rotation operations to the rotation operation unit;
A plate integrally connected to the rotor, a second transmission unit transmitting a rotational operation in both directions to the rotational operation unit to the rotor;
A transmission switching unit that selectively switches the first transmission unit and the second transmission unit by the user's selection operation;
The transmission switching unit includes an engagement operation tool capable of engaging between the rotation operation unit and the plate,
When the engagement between the rotation operation unit and the plate is in a released state, the first transmission unit is selected,
When the rotation operation unit and the plate are in an engaged state, the second transmission unit is selected,
The blood extracorporeal treatment apparatus, wherein the partial region of the elastic tube is squeezed between the roller and the housing wall as the rotor rotates. The engagement operation tool is a lock pin, and is attached to an operation handle configured to be foldable in the rotation operation unit,
The plate has an engagement hole that can receive the lock pin,
The rotation operation portion and the plate are engaged when the lock pin is inserted into the engagement hole when the operation handle is folded and when the operation handle is unfolded. The blood extracorporeal treatment apparatus according to claim 5, wherein the lock pin is released from the engagement hole to be disengaged. The blood extracorporeal treatment apparatus according to claim 5 or 6, wherein a rotation detection unit for detecting a rotation direction of the rotor is connected to the rotor. The rotor and the rotational power source are connected in a state where rotational motion in both directions is transmitted,
The blood body extracorporeal treatment apparatus according to claim 7, wherein the rotation detection unit is a magnetic field detection element incorporated in the rotational power source. An input receiving unit for receiving an input of information on a rotation direction from the rotation detection unit and an output of a rotation operation instruction to the rotational power source;
An information providing unit for providing information to the user with at least one of display on a screen and sound notification;
A drive unit that performs drive control based on input information from the input receiving unit, and that instructs the information providing unit to provide information to a user;
The control unit provides an instruction to issue a warning about the rotation direction to the user when input information related to the rotation direction from the rotation direction detection unit is opposite to a predetermined direction. The blood extracorporeal treatment apparatus according to claim 8, wherein the blood extracorporeal treatment apparatus outputs the blood to the unit. In the blood circuit, a purification unit that purifies blood is inserted in the circuit,
When the processing operation for deriving blood from a patient by the pumping action of the roller pump, transferring the blood in the blood flow path, and returning the blood to the patient after passing through the purification unit is a prescribed operation, The blood extracorporeal treatment apparatus according to claim 9, wherein the warning is issued when a rotation direction of the rotor input from the rotation direction detection unit is opposite to the transfer direction.

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