JP6438227B2 - Blood purification equipment - Google Patents

Description

  The present invention relates to a blood purification apparatus for performing blood purification treatment such as dialysis treatment.

  For example, a hemodialysis apparatus (blood purification apparatus) collects the dialysate while supplying dialysate to the blood circuit (arterial blood circuit and vein side blood circuit) in which a dialyzer (blood purifier) is formed, and the dialyzer. The main body of the treatment apparatus is configured to puncture a patient with a puncture needle attached to the tip of the blood circuit, and circulate the patient's blood extracorporeally in the blood circuit and perform blood purification and water removal with a dialyzer. Etc.

  As a conventional blood purification device, for example, as disclosed in Patent Document 1, when the power supply from the power source is cut off due to a disaster such as an earthquake or a power transmission failure, the blood purification treatment is continued. A battery with a built-in battery that can supply power has been proposed. Such a battery is normally stored by power supply from a commercial power source, and can be supplied to a blood pump or the like included in the blood purification device when power supply from the power source is interrupted due to a power failure or the like. Has been.

JP 2008-283996 A

  However, in the above prior art, at the time of a power failure, although the blood pump or the like can be continuously driven by power supply by the battery, the capacity of the battery is limited, so the blood purification treatment is normally terminated. There was a risk that the battery would run out before. For example, when the power supply from the power source is cut off due to a power failure or the like, if the battery capacity runs out before the blood purification treatment is finished and the blood in the blood circuit is returned to the patient, the blood pump is manually It was necessary to return the blood by rotating.

  The present invention has been made in view of such circumstances, and provides a blood purification device capable of continuously supplying power from a battery for a long time when power supply from a power source is interrupted due to a power failure or the like. There is to do.

The invention described in claim 1 includes a blood purification apparatus main body having pump means including a blood pump for circulating the patient's blood extracorporeally and to which a blood purifier for purifying the extracorporeal circulating blood can be attached; Provided in the blood purification apparatus main body, mounted on the blood purification apparatus main body, a control means that can control the operation of the pump means, a power supply determination means that can determine that the power supply from the power source is cut off, and In the blood purification apparatus comprising a battery capable of supplying power when it is determined by the power supply determination means that power supply from the power supply is cut off, the control means is configured to supply power from the power supply by the power supply determination means. It is when the power supply is determined to be blocked, with may carry out at preset power power supply to the pump means by the battery, the power supply cutoff Only if prior towards preset power from a small power that is characterized by causing at preset power power supply to the pump means by the battery.

According to a second aspect of the invention, the blood purification apparatus according to claim 1 Symbol placement, the control means, the power supply time by the battery, or the preset power sequentially changeable in accordance with the voltage drop of the battery Alternatively, the power supply can be stopped.

According to a third aspect of the present invention, in the blood purification apparatus according to the second aspect , in addition to the pump means, the blood purification apparatus main body includes clamp means capable of clamping a liquid flow path, and monitoring for monitoring extracorporeal circulation of blood. And a display means capable of displaying related to treatment, and the priority order in which the priority of the blood pump is set highest for the pump means, clamp means, monitoring means and display means can be set in advance. The power supply by the battery is sequentially reduced or stopped from the lowest priority order.

According to a fourth aspect of the present invention, in the blood purification apparatus according to any one of the first to third aspects, the control unit determines that the power supply from the power source is interrupted by the power supply determination unit. The power supply to the pump means by the battery can be performed with preset power on condition that a predetermined time has elapsed from the time.

  According to the first aspect of the present invention, when it is determined by the power supply determination means that the power supply from the power source has been cut off, the control means causes the battery to supply power to the pump means with preset power. Therefore, when the power supply from the power source is interrupted due to a power failure or the like, the power supply by the battery can be continuously performed for a long time. .

In addition , when the power supply determination unit determines that the power supply from the power source has been cut off, the control unit is provided only when the preset power is smaller than the power before the power supply is cut off. Since the electric power supply to the pump means is performed with the preset electric power, the electric power supply by the battery can always be reduced from the normal time.

According to the second aspect of the present invention, the control means is capable of sequentially changing the power supply time by the battery or the preset power according to the voltage drop of the battery or stopping the power supply. Thus, when the power supply from the power source is interrupted, the power supply by the battery can be continued for a longer time.

According to the invention of claim 3 , it is possible to set in advance the priority set with the highest priority of the blood pump for the pump means, the clamp means, the monitoring means and the display means. Since the power supply is sequentially reduced or stopped, the power supply can be continued or stopped according to the priority.

According to the invention of claim 4 , the control means supplies power to the pump means by the battery on the condition that a predetermined time has elapsed since the time when it was determined by the power supply determination means that the power supply from the power source was cut off. Since it can be performed with preset power, it is possible to avoid changing to power supply with preset power when the power supply is momentarily interrupted (instantaneous power failure).

The perspective view which shows the blood purification apparatus which concerns on embodiment of this invention Block diagram showing the configuration of the blood purification apparatus Flow chart showing control contents by control means of blood purification apparatus The graph for demonstrating the determination method by the electric power supply determination means of the blood purification apparatus

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The blood purification apparatus 1 according to the present embodiment is applied to a dialysis treatment apparatus that is disposed in the vicinity of a bed as a treatment table on which a patient can sit or lie down and to perform hemodialysis treatment (blood purification treatment) on the patient. As shown in FIG. 1, a dialysis machine main body 2 (blood purification device main body), a blood pump 3, a syringe pump 4, a monitor screen 5, an alarm lamp 6, a blood concentration sensor 7, and air bubbles And a detector 8.

  The dialyzer main body 2 includes various treatment means for purifying the patient's blood while circulating it outside the body. For example, a dialyzer to which a blood circuit is connected can be attached, and a dialysate is applied to the dialyzer. A port, a flow path, and the like for introducing and deriving the gas are disposed. The dialyzer main body 2 is provided with a blood pump 3 composed of a squeezing type pump, and is configured to circulate the patient's blood extracorporeally in the blood circuit by driving the blood pump 3.

  Further, as shown in FIG. 2, the dialysis machine main body 2 includes a control unit 13, a pump unit 14, a clamp unit 15, a monitoring unit 16, and a display unit 17. The power supply and control to the pump means 14, the clamp means 15, the monitoring means 16 and the display means 17 are performed. The control means 13 comprises a CPU or the like mounted on the dialyzer body 2 and can control the operations of the pump means 14 and the clamp means 15 and the operations of the monitoring means 16 and the display means 17.

  The pump means 14 is mainly composed of actuators capable of supplying a liquid by energization, and in addition to the blood pump 3 for circulating the patient's blood extracorporeally, other pumps (a drug such as an anticoagulant) that can be supplied by energization. A syringe pump 4 that can be injected into blood circulating outside the body, a liquid feed pump for feeding dialysate to the dialyzer, a water removal pump for water removal, a fluid replacement pump for fluid replacement, etc. . The clamping means 15 is capable of opening and closing by energization and clamping a liquid flow path composed of blood, dialysate or physiological saline flow path, etc., and clamp means for opening and closing the tip of the blood circuit, and supply of physiological saline It comprises clamping means for opening and closing the path, clamping means for opening and closing an overflow line extending from the blood circuit, and the like.

  The monitoring means 16 is composed of sensors for monitoring the extracorporeal circulation of blood. In addition to the blood concentration sensor 7 and the bubble detector 8, the venous pressure monitoring sensor, the blood pressure removal monitoring sensor, the dialyzer inlet pressure monitoring sensor, and the blood discriminator. It consists of various sensors such as blood pressure monitors and measuring devices. The display means 17 can display related to treatment by energization, and includes a monitor screen 5, an alarm lamp 6, and the like. Note that the monitor screen 5 according to the present embodiment includes a touch panel, and various inputs are possible in addition to the display related to treatment.

  Furthermore, the dialysis machine main body 2 includes a power unit 10 having a power supply determination unit 11 and a battery voltage monitoring unit 12 and a battery 9, and an AC power source (commercial power source) is connected to the power unit 10. It is configured. The power supply determining means 11 can determine that the power supply from the AC power source has been cut off. For example, as shown in FIG. 4, the power supply determining unit 11 is set to 0 (V) in the waveform generated with the power supply from the AC power source. It has a circuit configuration capable of detecting a certain time point (zero cross α) and outputting a pulse when the zero cross α is detected. And it is comprised so that it may determine with the electric power supply from AC power supply having been interrupted on condition that a pulse output is no longer detected.

  The battery 9 is mounted on the dialysis machine main body 2, and when it is determined by the power supply determination unit 11 that the power supply from the AC power source is cut off, the pump unit 14, the clamp unit 15, the monitoring unit 16, and the display unit 17. Such a secondary battery can be supplied with power and can be charged and discharged. In a normal time when power is supplied from the AC power supply, the battery 9 is charged by the power supply from the AC power supply.

  The battery voltage monitoring means 12 is connected to the battery 9 and can monitor the remaining capacity (voltage drop) of the battery 9. The remaining capacity of the battery 9 detected by the battery voltage monitoring unit 12 and the determination by the power supply determination unit 11 are configured to be transmitted to the control unit 13 in real time. Therefore, the control means 13 is configured to switch to the power supply by the battery 9 when the power supply determination means 11 determines that the power supply from the AC power source is cut off. The state of the battery 9 can be grasped from the detected remaining capacity of the battery 9.

  Here, the control unit 13 according to the present embodiment is configured so that when the power supply determination unit 11 determines that the power supply from the AC power source is cut off, the power supply to the pump unit 14 by the battery 9 is set in advance. It is configured such that it can be performed by (power supply by a predetermined voltage). That is, when the power supply from the AC power source is interrupted due to a power failure or the like, the power supply is switched to the power supply by the battery 9 and the preset power is supplied to the pump means 14 having a relatively large power consumption. It has been done. The preset power is set to be lower than the normally supplied power, and it is preferable that the pump means 14 be the minimum power that can exhibit the pump function.

  In addition, when the power supply determination unit 11 determines that the power supply from the AC power supply is cut off, the control unit 13 according to the present embodiment has a power set in advance from the power before the power supply is cut off. Only when the direction is smaller, the power supply to the pump means 14 by the battery 9 is performed with preset power. That is, when the power supply from the AC power source is cut off due to a power failure or the like, and the power supplied to the pump means 14 before the cutoff is smaller than the preset power, the preset power supply The electric power before being cut off is continuously supplied to the pump means 14 without being switched.

  Furthermore, the control means 13 according to the present embodiment is configured so that the power supply time by the battery 9 (that is, the elapsed time after the power supply from the AC power supply is interrupted due to a power failure or the like and switched to the power supply by the battery 9), or the battery The preset power can be sequentially changed or the power supply can be stopped according to the voltage drop of the battery 9 monitored by the voltage monitoring means 12. Thereby, when the power supply from the AC power source is interrupted due to a power failure or the like, the power supply by the battery 9 can be continued for a longer time.

  Furthermore, in the blood purification apparatus 1 according to this embodiment, the priority order in which the priority of the blood pump 3 is set highest for the pump unit 14, the clamp unit 15, the monitoring unit 16, and the display unit 17 can be set in advance. The power supply by the battery 9 is sequentially reduced or stopped from the lowest priority order. That is, in the configuration that the dialysis device main body 2 needs to supply power, what is necessary for completely ending the treatment even when the power supply is interrupted (especially the blood pump 3 is most necessary). The power supply by the battery 9 can be performed for a longer period of time by sequentially reducing or stopping the power supply other than the above (for example, lowering or stopping the power supplied sequentially from the lowest priority order). It can be done. Note that a method of reducing the clock frequency of a CPU or the like can be employed as one of the methods of sequentially reducing power supply.

  In addition, the control unit 13 according to the present embodiment is configured so that the power supplied to the pump unit 14 by the battery 9 is obtained on the condition that a predetermined time has elapsed since the power supply determination unit 11 determined that the power supply from the power source was cut off. The power supply is configured to be performed with preset power. That is, the power supply from the battery 9 to the pump unit 14 with a predetermined delay time from the time when it is determined that the power supply from the AC power supply is cut off is performed at a preset power. When power supply is interrupted (instantaneous power failure), it is possible to avoid changing to power supply using preset power.

Next, a control method of the blood pump 3 by the control means 13 according to the present embodiment will be described based on the flowchart of FIG.
When dialysis treatment is being performed, it is determined whether or not power supply by an AC power source is performed based on a signal from the power supply determination unit 11 (S1), and it is determined that power supply is being performed. In S2, the operation of the apparatus is continued, and if it is determined that the power supply is not performed, the process proceeds to S3 and the power supply by the battery 9 is switched.

Thereafter, it is determined whether or not a predetermined time has elapsed since switching to the power supply by the battery 9 in S4. If the predetermined time has not elapsed, 1 (s) is added to the elapsed time in S5. When it is determined in S4 that the predetermined time has elapsed, the power Q _B before the power supply from the AC power supply is cut off is compared with the preset power Q _BB, and the power Q _BB If it is determined that the power is smaller than the power Q _B , the process proceeds to S7, and the power supplied to the pump means 14 is changed to the power Q _BB set in advance.

On the other hand, if it is determined in S6 that the power Q _BB is larger than the power Q _B , the process proceeds to S8, where the power supplied to the pump means 14 is the power Q before the power supply from the AC power supply is cut off. _The operation is continued by being held in _B. Then, after the power supplied to the pump unit 14 is changed to the power Q _BB in S7 or after the power supplied to the pump unit 14 is held in the power Q _B in S8, the battery 9 uses the battery 9 in S9. The power supply time or the voltage drop of the battery 9 is compared with a preset priority (priority set with the highest priority of the blood pump 3).

That is, it is determined in S9 whether or not the power supply time by the battery 9 or the voltage drop of the battery 9 has exceeded a predetermined threshold value. If not, the elapsed time is 1 (s) in S10. Or subtracts 0.5 (V) from the battery voltage, and if the threshold value is exceeded, the process proceeds to S11, and the supply voltage is set to Q _BB ′ (Q _BB > Q Change to _BB ') or stop power supply. A series of control is complete | finished above. When the power supply determination unit 11 determines that the power supply from the AC power supply has been restored, the power supply from the battery 9 is switched to the power supply from the AC power supply.

  According to the above embodiment, when the power supply determination unit 11 determines that the power supply from the AC power supply is cut off, the control unit 13 sets the power supply from the battery 9 to the pump unit 14 to a preset power. Therefore, when the power supply from the power source is interrupted due to a power failure or the like, the power supply by the battery is continuously performed for a long time. Can be made.

Furthermore, the control means 13 according to the present embodiment is set in advance from the power (Q _B ) before the power supply is cut off when the power supply judgment means 11 determines that the power supply from the power supply is cut off. Only when the power (Q _BB ) is smaller, the power supply to the pump means by the battery is performed with the preset power, so that the power supply by the battery can always be reduced from the normal time.

  Moreover, the priority set with the highest priority of the blood pump for the pump unit 14, the clamp unit 15, the monitoring unit 16, and the display unit 17 (the treatment is completely terminated even in an emergency when the power supply is cut off). Therefore, the power supply by the battery is sequentially reduced or stopped in order from the lowest priority order, so that the power supply can be continued or stopped according to the priority.

  Although the present embodiment has been described above, the present invention is not limited to this. For example, when the power supply determination unit 11 determines that the power supply from the power source is cut off, the battery 9 supplies power to the pump unit 14. May be performed at a preset power, and power supply to other means (clamping means 15, monitoring means 16 or display means 17) may be stopped. The applied blood purification apparatus may be applied to other blood purification apparatuses that can purify the patient's blood while circulating it outside the body, in addition to the dialysis apparatus as in the present embodiment.

  The control means replaces the configuration in which the power supply to the pump means by the battery can be performed with the preset power when the power supply from the power supply is cut off by the power supply determination means. It is good also as a structure which can be changed into speed.

When it is determined by the power supply determination means that the power supply from the power source has been cut off, the power supply to the pump means by the battery can be performed at a preset power, and from the power before the power supply is cut off As long as the preset power is smaller, the blood purification apparatus having a control means for performing power supply to the pump means by the battery with the preset power is different in appearance or other The present invention can also be applied to those with functions added.

1 Blood purification device 2 Dialysis machine main body (blood purification device main body)
DESCRIPTION OF SYMBOLS 3 Blood pump 4 Syringe pump 5 Monitor screen 6 Warning lamp 7 Blood concentration sensor 8 Bubble detector 9 Battery 10 Power unit 11 Power supply determination means 12 Battery voltage monitoring means 13 Control means 14 Pump means 15 Clamp means 16 Monitoring means 17 Display means

Claims (4)

A blood purification apparatus main body having a pump means including a blood pump for circulating the patient's blood extracorporeally and capable of being attached with a blood purifier for purifying the extracorporeally circulating blood;
Control means provided in the blood purification apparatus main body and capable of controlling the operation of the pump means;
Power supply determination means capable of determining that power supply from the power source has been interrupted;
A battery that is mounted on the blood purification device main body and can supply power when it is determined by the power supply determination means that power supply from a power supply is cut off, and
In the blood purification apparatus comprising
When the power supply determining means determines that the power supply from the power supply is cut off, the control means can cause the power supply to the pump means by the battery to be performed with preset power , and the power supply The blood purification apparatus is characterized in that the power supply to the pump means by the battery is performed with the preset power only when the preset power is smaller than the power before the power is cut off . The control means, the power supply time by the battery, or claim 1 Symbol mounting, characterized in that sequential changeable or power supply power the previously set according to the voltage drop of the battery was set to be stopped Blood purification device. The blood purification apparatus main body includes, in addition to the pump means, a clamping means capable of clamping a liquid flow path, a monitoring means for monitoring the extracorporeal circulation of blood, and a display means capable of displaying related to treatment, The priority set with the highest priority of the blood pump can be set in advance for the pump means, the clamp means, the monitoring means, and the display means, and the power supply by the battery is sequentially reduced or stopped from the lowest priority order. The blood purification apparatus according to claim 2, wherein The control means sets a predetermined power supply to the pump means by the battery on the condition that a predetermined time has elapsed from the time when the power supply determination means determines that the power supply from the power source is cut off. The blood purification apparatus according to any one of claims 1 to 3 , wherein the blood purification apparatus is capable of being performed in the same manner.

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