JP2005304681A - Blood purifying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blood purifying apparatus capable of maintaining an operability of an operation input means for setting a pump driving speed and also capable of preventing the setting of the pump driving speed on the basis of an operational error. <P>SOLUTION: A dialyzer is provided which comprises a blood circuit for performing extracorporeal circulation of the blood of a patient, a blood purifying means connected to the blood circuit for purifying the blood flowing within the blood circuit, a blood pump arranged within the blood circuit, and the operation input means 7 for setting the driving speed of the blood pump arbitrarily on the basis of operation amount which is always in an initial state when an operation starts. The dialyzer is further provided with a validity determining means 17 for determining whether the setting by the operation input means 7 is based on an operational error or not. When the setting is determined to be not on the basis of an operational error, the validity determining means validates the setting by the operation input means 7, and when the setting is determined to be on the basis of an operational error, the validity determining means invalidates the setting by the operation input means 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a blood purification apparatus for purifying a patient's blood while circulating it outside the body.

  In general, a blood purification device, for example, a dialysis device used in dialysis treatment, is mainly composed of a blood circuit for circulating a patient's blood extracorporeally, a dialyzer connected to the blood circuit, and a so-called ironing type blood pump. The blood of the patient is circulated extracorporeally in the blood circuit by driving the blood pump, and the blood is purified by the dialyzer in the middle of the circulation. The dialyzer is composed of a housing having a plurality of hollow fibers therein, and minute holes (pores) are formed in the wall surface of the hollow fibers to form a blood purification membrane.

  By the way, the driving speed of the blood pump is set by, for example, a dial type operation input means comprising a rotary encoder formed in the dialyzer body. That is, when the operation input means is rotated in the right or left direction, the driving speed of the blood pump can be set faster or slower than the current state according to the rotation amount. As a result, in addition to the initial stage of dialysis treatment (until the priming solution in the blood circuit is replaced with blood) and the final stage of dialysis treatment (when returning the blood remaining in the blood circuit to the patient), When it is desired to change the blood flow rate (when the patient eats or when the patient's blood pressure decreases), the driving speed of the blood pump can be changed and set at an arbitrary timing. In addition, since this prior art does not relate to the literature known invention, there is no prior art document information to be described.

  However, in the above-described conventional blood purification apparatus, when an operation is made by accidentally touching the operation input means for setting the driving speed of the blood pump, the blood pump may be driven with the setting based on the erroneous operation. was there. In order to avoid such problems, it is conceivable to provide a cover that can be opened and closed on the operation input means, to prevent erroneous operation by the cover during normal operation, and to be able to operate by opening the cover during operation. When the method is applied to a device with a relatively high frequency of use such as the operation input means, there is a problem that the operation becomes troublesome.

  The present invention has been made in view of such circumstances, and can maintain the operability of the operation input means for setting the drive speed of the pump, and the drive speed of the pump is set based on an erroneous operation. It is an object of the present invention to provide a blood purification device that can prevent this.

  According to the first aspect of the present invention, a blood circuit for circulating the patient's blood extracorporeally, blood purification means connected to the blood circuit and purifying the blood flowing through the blood circuit, and the blood circuit are provided. In a blood purification apparatus having a pump and an operation input means that is always in an initial state at the start of operation and can arbitrarily set the drive speed of the pump based on an operation amount, the setting by the operation input means is caused by an erroneous operation If it is determined whether the operation is not an erroneous operation, the setting by the operation input unit is validated. If the operation input unit is determined to be an erroneous operation, the setting by the operation input unit is invalidated. It is provided with.

  The invention according to claim 2 is the blood purification apparatus according to claim 1, further comprising a timer for detecting that the operation has been continuously performed for a predetermined time from the start of the operation by the operation input means, and the validity determination. The means determines that it is not an erroneous operation when the timer detects a continuous operation for a predetermined time and determines that it is an erroneous operation when an operation for a predetermined time is not detected.

  The invention according to claim 3 is the blood purification apparatus according to claim 1, further comprising operation permission input means for permitting an operation by the operation input means, and the validity determining means has an input by the operation permission input means. In this case, it is determined that the operation is not an erroneous operation, and when there is no input, it is determined that the operation is an erroneous operation.

  According to a fourth aspect of the present invention, in the blood purification apparatus according to any one of the first to third aspects of the present invention, the blood purification apparatus includes display means for displaying the set driving speed of the pump, The display form is characterized in that the display form is changed based on the determination by the validity determining means.

  According to a fifth aspect of the present invention, in the blood purification apparatus according to the fourth aspect, the display means comprises a touch panel capable of predetermined input, and the display portion of the driving speed constitutes the operation permission input means. It is characterized by.

  According to the first aspect of the present invention, since the validity determining means determines whether or not the setting by the operation input means is due to an erroneous operation, the operability of the operation input means for setting the pump driving speed can be maintained. At the same time, it is possible to prevent the pump drive speed from being set based on an erroneous operation.

  According to the invention of claim 2, the validity determining means determines that it is not an erroneous operation when the timer detects a continuous operation for a predetermined time, and determines that it is an erroneous operation when it does not detect the continuous operation for a predetermined time. The operation object is sufficient with one operation input means, and the operability can be further improved.

  According to the invention of claim 3, the validity determining means determines that there is no erroneous operation when there is an input from the operation permission input means, and determines that it is an erroneous operation when there is no such input. It is possible to prevent the setting due to the erroneous operation.

  According to the invention of claim 4, since the display form of the display portion of the driving speed in the display means is changed based on the judgment of the validity judgment means, is the setting by the operation input means invalidated or validated? Can be visually observed, and the operability can be further improved.

  According to the invention of claim 5, since the display portion of the drive speed on the touch panel constitutes the operation permission input means, the device configuration can be further simplified and the operability can be further improved.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The blood purification apparatus according to the first embodiment is applied to a dialysis apparatus used for dialysis treatment. As shown in FIG. 1, a blood circuit comprising an arterial blood circuit 1a and a venous blood circuit 1b A dialyzer 2 as a blood purification means, a blood pump 3, a drip chamber 4, and a dialyzer body 5 are mainly configured. The blood pump 3 is disposed at a predetermined position of the dialyzer body 5 as shown in FIG.

  As shown in FIG. 1, the blood circuit is mainly composed of an arterial blood circuit 1a and a venous blood circuit 1b made of a flexible tube. Between the arterial blood circuit 1a and the venous blood circuit 1b, the blood circuit is formed. Is connected to the dialyzer 2. An arterial puncture needle a is connected to the distal end of the arterial blood circuit 1a, and an iron blood pump 3 is disposed in the middle. On the other hand, a vein side puncture needle b is connected to the distal end of the vein side blood circuit 1b, and a drip chamber 4 is connected in the middle.

  Then, when the blood pump 3 is driven with the patient punctured with the artery side puncture needle a and the vein side puncture needle b, the patient's blood reaches the dialyzer 2 through the artery side blood circuit 1a, Blood purification is performed by the dialyzer 2, and bubbles are removed in the drip chamber 4, and then returned to the patient's body through the venous blood circuit 1 b. That is, the blood of the patient is purified by the dialyzer 2 while circulating outside the body by the blood circuit 1.

  The dialyzer 2 is formed with a blood introduction port 2a, a blood outlet port 2b, a dialysate inlet port 2c, and a dialysate outlet port 2d in the casing. Among these, the blood inlet port 2a has an arterial blood circuit 1a. However, the venous blood circuit 1b is connected to the blood outlet port 2b. The dialysate introduction port 2c and the dialysate lead-out port 2d are connected to a dialysate introduction line L1 and a dialysate discharge line L2 extending from the dialyzer body 5, respectively.

  A plurality of hollow fibers are accommodated in the dialyzer 2, 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. A hollow fiber membrane is formed in the hollow fiber by forming a large number of minute holes (pores) penetrating the outer circumferential surface and the inner circumferential surface, and impurities in the blood are passed through the membrane in the dialysate. It is comprised so that it can permeate | transmit.

  On the other hand, the dialyzer body 5 is provided with a water removal pump (not shown) for removing water from the blood of the patient flowing in the dialyzer 2. Furthermore, one end of the dialysate introduction line L1 is connected to the dialyzer 2 (dialyte introduction port 2c), and the other end is connected to a dialysate supply device (not shown) for preparing a predetermined concentration of dialysate. One end of the dialysate discharge line L2 is connected to the dialyzer 2 (dialysate outlet port 2d), and the other end is connected to a waste fluid means (not shown), so that the dialysate supplied from the dialysate supply device is After reaching the dialyzer 2 through the dialysate introduction line L1, the dialysate discharge line L2 is sent to the waste liquid means.

  As shown in FIG. 2, an operation unit 6 is disposed on the upper part of the dialyzer body 5, and the operation unit 6 is provided with a touch panel 6 a as a display unit, an operation input unit 7, and the like. As shown in FIG. 3, in addition to the operation input means 7, the operation unit 6 stops when the main power switches 8 a (off) and 8 b (on) and a buzzer as an alarm are sounding are pressed. A buzzer stop switch 9 and a blood pump power switch 10 that enables the blood pump 3 to be operated are disposed, and a set driving speed (blood flow rate) of the blood pump 3 is shown in the lower right corner of the screen of the touch panel 6a. A display portion H is displayed.

  The operation input means 7 is a dial type operation means composed of a rotary encoder. As shown in FIGS. 4 and 5, the operation input means 7 is a rotation in which a knob portion 11 that can be picked by an operator and a slit 13a formed on the entire periphery. It is mainly composed of a plate 13, a fixed plate 14 having slits 14a formed at two locations corresponding to the slits 13a, a light emitting element 15, and a pair of light receiving elements 16. The rotating plate 13 is connected to the knob portion 11 via the shaft 12 and is configured to be able to rotate together with the knob portion 11.

  Further, the knob portion 11 has a predetermined moderation (click) at the time of rotation, and the slit 13a of the rotating plate 13 and the slit 14a of the fixed plate 14 do not coincide with each other at the normal time. When the operator picks the knob portion 11 and rotates it in either the left or right direction (forward or reverse), the slits 13a and 14a are matched while moderation is given to the knob portion 11, and these slits The light emitted from the light-emitting element 15 passes through the light-receiving element 16 and is transmitted as a detection signal, so that the driving speed of the blood pump 3 can be set.

  That is, since the order of light from the light emitting elements 15 detected by the pair of light receiving elements 16 is different between the forward rotation and the reverse rotation of the knob section 11, whether the knob section 11 is rotated forward or reverse based on the order. The setting can be changed to increase the driving speed of the blood pump 3 during normal rotation and decrease the driving speed during reverse rotation. Further, if the knob portion 11 is continuously rotated (including normal rotation or reverse rotation), the light detection by the light receiving element 16 is performed a plurality of times, so that the driving speed of the blood pump 3 can be set as desired.

  Thus, since the operation input means 7 is composed of a rotary encoder, the setting value of the driving speed does not correspond to the angle of the knob portion, and is always in the initial state (increase / decrease of the driving speed from the current setting value) at the start of the operation. Will be performed). Incidentally, in other types of operation input means that set the driving speed using a variable resistor or the like, the angle and position of the knob portion correspond to the set value, and the `` always initial state at the start of operation '' is I can't say that. In this embodiment, the operation input means 7 is composed of a rotary encoder. However, the operation input means 7 is always in an initial state at the start of operation, and the drive speed of the blood pump can be arbitrarily set based on the operation amount. If it exists, it is good also as another form of operation input means.

  As shown in FIG. 6, the operation input means 7 is electrically connected to the validity determination means 17, the timer 18, the setting change processing section 19, the setting storage section 20, the touch panel 6 a (all disposed in the dialyzer body 5). It is connected to the. The validity determining means 17 determines whether or not the setting by the operation input means 7 is due to an erroneous operation. When it is determined that the setting is not an erroneous operation, the validity determining means 17 validates the setting by the operation input means 7 and determines that the setting is an erroneous operation. This is for invalidating the setting by the operation input means.

  The timer 18 is for detecting that the operation has been continuously performed for a predetermined time (for example, about 0.7 seconds) from the start of the operation by the operation input means 7. That is, when the timer 18 detects a continuous operation for a predetermined time by the operation input unit 7, the validity determining unit 17 determines that the operation is not an erroneous operation, and an erroneous operation is not performed when the continuous operation for the predetermined time is not detected (instantaneous operation). It comes to judge that. As a result, when the operation input unit 7 is accidentally touched, for example, when the operation input unit 7 is instantaneously operated (erroneous operation), the validity determination unit 17 invalidates the operation and sets the driving speed of the blood pump 3. Is impossible.

  On the other hand, when the validity judging means 17 judges that it is not an erroneous operation (ie, judged to be valid), a control signal is sent to the driving mechanism (control section such as a motor) of the blood pump 3 via the setting change processing section 19. The driving speed is set based on the setting by the operation input means 7, and the set value (blood flow rate) is displayed on the display portion H of the touch panel 6a. The setting storage unit 20 includes storage means such as a memory, and stores setting values, and the driving speed of the blood pump 3 by the setting change processing unit 19 is changed based on the setting values.

  Further, the timer 18 is configured to detect that a predetermined time (for example, 60 seconds) has elapsed since the operation of the operation input unit 7 is not performed, and recognizes that the operation has ended after the predetermined time has elapsed. Thus, the state returns to the initial state (a state of waiting for an operation by the operation input means 7). Thereby, when performing the operation by the operation input means 7 after the next time, it is possible to make a determination again as to whether or not the operation is erroneous.

  Further, the display portion H of the touch panel 6a is configured such that the display form (display color in the case of the present embodiment) is changed based on the determination by the validity determining means 17. Specifically, when the operation by the operation input unit 7 is performed and the validity determination unit 17 determines that it is invalid, or when the operation by the operation input unit 7 is not performed, the display portion H is displayed. When the operation input unit 7 is operated and the validity determination unit 17 determines that the color is light blue or the like and the validity determination unit 17 determines that the color is valid, the display color of the display portion H is changed to red or the like.

  Thereby, it can be visually observed whether the setting by the operation input means 7 is invalid or valid, and the operability can be further improved. In the present embodiment, the display color of the display portion H is changed based on the determination by the validity determining means 17; however, if the display form changes, the display portion of another configuration (for example, the shape of the display portion H is changed). Or the display portion H may be blinked when it is determined to be valid.

  According to the present embodiment, the validity determining means 17 determines that there is no erroneous operation when the timer 18 detects a continuous operation for a predetermined time, and determines that it is an erroneous operation when no continuous operation for a predetermined time is detected. As compared with the case where the operation target is only one operation input means and a cover for preventing erroneous operation is provided, the operability can be further improved.

Next, a second embodiment according to the present invention will be described.
As in the first embodiment, the blood purification apparatus according to the present embodiment is applied to a dialysis apparatus used for dialysis treatment. As shown in FIG. 1, an arterial blood circuit 1a and a venous blood circuit are used. It is mainly composed of a blood circuit composed of 1b, a dialyzer 2 as blood purification means, a blood pump 3, a drip chamber 4, and a dialyzer body 5. The same constituent elements as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 7, the dialysis machine body 5 includes an operation input means 7, a validity determination means 17 ′, a timer 18 ′, a setting change processing section 19, a setting storage section 20, a touch panel 6 a (display part H), and an operation permission. Input means 21 is electrically connected and arranged. The operation permission input means 21 permits the operation by the operation input means 7, and the validity determination means 17 ′ determines that there is no erroneous operation when there is an input by the operation permission input means 21, and there is no input and simply When there is only an operation by the operation input means 7, the operation is determined to be an erroneous operation.

  The operation permission input means 21 includes a display portion H that displays the driving speed of the blood pump, and allows the operation by the operation input means 7 by touching the display portion H with a finger. Further, the display portion H is configured so that the display form (display color also in the case of this embodiment) is changed based on the determination of the validity determination means 17 ′, as in the first embodiment. In the state where the operation by is invalid, the display color is, for example, light blue, and in the state where it is valid, the display color is changed to, for example, red.

  That is, even when the operation input means 7 is simply operated when the display portion H is light blue or the like, the validity determining means 17 ′ determines that the operation is invalid, invalidates the operation, and instructs the setting change processing unit 19 While no signal is transmitted, if the operation input means 21 is operated after touching the display portion H and then the operation input means 7 is operated, the validity determining means 17 ′ determines that the operation is not erroneous and the operation is performed. The instruction signal based on the setting by the operation input means 7 is transmitted to the setting change processing unit 19.

  Note that the timer 18 ′ does not detect the elapse of time from the start of operation of the operation input means 7 as in the first embodiment, but does not detect the operation input means 7 for a predetermined time (for example, 60 seconds) can be detected. As a result, after the predetermined time has elapsed, the operation is recognized and the initial state (the state waiting for the operation by the operation permission input means 21 and the operation input means 7) is returned, and the operation permission input after the next time When performing an operation using the means 21 and the operation input means 7, it is possible to make a determination again as to whether or not the operation is incorrect.

  According to the present embodiment, the validity determining unit 17 ′ determines that there is no erroneous operation when there is an input by the operation permission input unit 21, and determines that it is an erroneous operation when there is no such input. Compared to the configuration in which the setting operation by the operation input unit 7 waits for a predetermined time as in the embodiment, the setting operation can be performed quickly, and the setting due to an erroneous operation can be prevented more reliably. Moreover, since the display part H of the drive speed in the touch panel 6a comprises the operation permission input means 21, the apparatus configuration can be further simplified, and the operability can be further improved.

  As mentioned above, although this embodiment was described, this invention is not limited to these, For example, it is judged whether the setting by the operation input means 7 is based on an erroneous operation or operation based on an operator's consciousness, As long as the validity or invalidity is determined, the determination may be based on another determination form. In the present embodiment, the present invention is applied to a dialysis apparatus in dialysis treatment, but other apparatuses that can purify the patient's blood while circulating it outside the body (for example, blood filtration dialysis, blood filtration, blood used in AFBF) The present invention may be applied to a purification device, a plasma adsorption device, and the like.

  Furthermore, although the operation input means in this embodiment sets the drive speed of the blood pump, it may set the drive speed of another pump of the blood purification apparatus. For example, a replacement pump that is driven during replacement, a plasma pump (pump for removing plasma from a plasma separator) used in a plasma adsorption method, or a replacement liquid pump (an activation liquid and a replacement liquid to regenerate the adsorber) It is also possible to set the drive speed of a pump for flowing through the container. Furthermore, the operation input means for setting the driving speed of the pump for injecting drugs such as heparin used at the time of dialysis treatment and plasma adsorption method and sodium citrate used at the time of treatment by plasma adsorption method into the blood circuit You may apply.

  Any blood purification apparatus that determines whether or not the setting by the operation input means is caused by an erroneous operation by the validity determining means can be applied to a device having a different external shape or having other functions added.

1 is an overall schematic diagram showing a blood purification apparatus (dialysis apparatus) according to a first embodiment of the present invention. The perspective view which shows the dialysis machine main body in the dialysis machine Front view showing the operation section of the dialysis machine body Longitudinal sectional view showing operation input means arranged in the operation unit Exploded perspective view showing the internal configuration of the operation input means Block diagram showing each component arranged in the main body of the dialysis machine The block diagram which shows each component arrange | positioned in the dialyzer main body in the blood purification apparatus (dialysis apparatus) which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

1a Arterial blood circuit 1b Venous blood circuit 2 Dialyzer (blood purification means)
3 Blood pump 4 Drip chamber 5 Blood device body 6 Operation unit 6a Touch panel (display means)
7 Operation input means 8a, 8b Main power switch 9 Buzzer stop switch 10 Blood pump power switch 11 Knob part 12 Shaft 13 Rotating plate 14 Fixed plate 15 Light emitting element 16 Light receiving element 17, 17 'Validity judging means 18, 18' Timer 19 setting Change processing part 20 Setting storage part 21 Operation permission input means H Display part

Claims (5)

A blood circuit for extracorporeal circulation of the patient's blood;
Blood purification means connected to the blood circuit for purifying blood flowing through the blood circuit;
A pump disposed in the blood circuit;
An operation input means that is always in an initial state at the start of operation and that can arbitrarily set the driving speed of the pump based on the operation amount;
In the blood purification apparatus having
It is determined whether the setting by the operation input means is due to an erroneous operation. When it is determined that the operation input means is not an erroneous operation, the setting by the operation input means is validated. A blood purification apparatus comprising validity determining means for invalidating the blood pressure.   A timer for detecting that the operation has been continuously performed for a predetermined time from the start of the operation by the operation input unit, and the validity determining unit is not erroneously operated when the timer detects an operation for a predetermined time. The blood purification apparatus according to claim 1, wherein the blood purification device is determined to be an erroneous operation when an operation for a predetermined time is not detected.   An operation permission input unit that permits an operation by the operation input unit is provided, and the validity determination unit determines that there is no erroneous operation when there is an input by the operation permission input unit, and an erroneous operation when there is no input. The blood purification apparatus according to claim 1, wherein the blood purification apparatus is determined.   The display device for displaying the set drive speed of the pump is provided, and the display form of the display portion of the drive speed is changed based on the determination of the validity determination device. 4. The blood purification apparatus according to any one of items 3.   5. The blood purification apparatus according to claim 4, wherein the display means comprises a touch panel capable of predetermined input, and the display portion of the driving speed constitutes the operation permission input means.

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