WO2016027868A1 - 血液循環システム - Google Patents
血液循環システム Download PDFInfo
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- WO2016027868A1 WO2016027868A1 PCT/JP2015/073428 JP2015073428W WO2016027868A1 WO 2016027868 A1 WO2016027868 A1 WO 2016027868A1 JP 2015073428 W JP2015073428 W JP 2015073428W WO 2016027868 A1 WO2016027868 A1 WO 2016027868A1
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- removal
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3621—Extra-corporeal blood circuits
- A61M1/3666—Cardiac or cardiopulmonary bypass, e.g. heart-lung machines
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- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
- A61M1/1601—Control or regulation
- A61M1/1603—Regulation parameters
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- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
- A61M1/1621—Constructional aspects thereof
- A61M1/1629—Constructional aspects thereof with integral heat exchanger
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- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
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- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
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- A61M60/109—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body incorporated within extracorporeal blood circuits or systems
- A61M60/113—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body incorporated within extracorporeal blood circuits or systems in other functional devices, e.g. dialysers or heart-lung machines
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- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
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- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/247—Positive displacement blood pumps
- A61M60/253—Positive displacement blood pumps including a displacement member directly acting on the blood
- A61M60/268—Positive displacement blood pumps including a displacement member directly acting on the blood the displacement member being flexible, e.g. membranes, diaphragms or bladders
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- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/30—Medical purposes thereof other than the enhancement of the cardiac output
- A61M60/36—Medical purposes thereof other than the enhancement of the cardiac output for specific blood treatment; for specific therapy
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- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/40—Details relating to driving
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
- A61M60/408—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable
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Definitions
- the present invention relates to a blood circulation system for circulating blood that has been removed by a blood pump.
- This application claims priority based on Japanese Patent Application No. 2014-167559 filed in Japan on August 20, 2014 and Japanese Patent Application No. 2015-53600 filed in Japan on March 17, 2015. The contents are incorporated here.
- a cardiopulmonary or auxiliary blood circulation system is used to circulate blood as needed. Has been.
- the blood removal line 501 transfers the blood received from the vein of the patient (human body) P to the reservoir 502.
- the blood removal line 501 is configured by a tube formed of a resin such as polyvinyl chloride, for example.
- the reservoir 502 has a tank inside, and temporarily stores the transferred blood.
- the blood pump 504 is stored in the reservoir 502 via a blood line 503 that connects the reservoir 502 and the blood pump 504 and a first blood line 505 that connects the blood pump 504 and the artificial lung 506.
- the collected blood is transferred to the artificial lung 506.
- a roller pump or a centrifugal pump is used as the blood pump 504, and the blood pump 504 is controlled by a signal output from the blood pump controller 540.
- the artificial lung 506 includes, for example, a hollow fiber membrane or a flat membrane excellent in gas permeability, and has a function of discharging carbon dioxide in blood and adding oxygen.
- the second blood supply line 507 receives blood added with oxygen by discharging carbon dioxide in the oxygenator 506 and transfers it to the artery of the patient P.
- the blood removal line 501 is clamped with forceps and the blood flow rate in the blood removal line 501 is determined. Need to be adjusted with forceps.
- Patent Document 1 discloses a technique for adjusting the blood flow rate by deforming the blood removal line 501 in order to accurately and easily operate the adjustment of the blood flow rate by the oxygenator. Has been.
- the artificial heart-lung machine described in Patent Document 1 sandwiches the blood removal line 501 by operating the blood removal regulator 521 having a clamper and a servo motor including a pair of clamp members by the blood removal regulator operation unit 520, for example. To adjust the amount of blood removed from the blood through the blood removal line 501.
- Patent Document 2 a blood removal regulator control unit and a blood supply regulator control unit are interlocked, and either one of these control units is operated to simultaneously control the blood removal amount and the blood flow rate.
- a technique for efficiently adjusting the blood flow rate in the oxygenator is disclosed.
- the amount of blood to be removed may vary depending on the situation of the operation, etc., and when the amount of blood flow varies greatly, the amount of blood corresponding to the amount of blood removal can be quickly and stably delivered. It can be difficult.
- the present invention has been made in view of such circumstances, and in a blood circulation system for circulating blood removed by a blood pump, a blood circulation system capable of stably circulating blood at an appropriate flow rate is provided.
- the purpose is to provide.
- a first aspect according to the present invention is a blood circulation system that is connectable to a human body and sends blood that has been removed to a human body using a blood pump, and the blood supply pump and the blood that has been removed from blood
- the control unit is configured such that, based on the blood removal volume parameter measured by the blood removal amount measurement unit, the blood flow amount flowing through the blood supply line corresponds to the blood removal amount flowing through the blood removal line. Since the blood flow rate by the blood pump is controlled so as to be within the specific range, the blood flow rate in the specific range can be ensured with respect to the blood removal rate. As a result, even when the blood flow is changed, blood within a specific range with respect to the blood flow is sent to the human body, and blood with an appropriate flow rate can be circulated stably.
- the blood removal line is a blood line formed on the side of the blood line constituting the blood circulation system where the blood removed from the human body is directed to the blood pump, and more specifically, the reservoir.
- a blood supply line means the blood line which goes to a human body side from a blood supply pump.
- a blood line that is located downstream of a site (for example, a reservoir) where blood is released into the space and continually loses its blood flow continuity is a blood removal line or a delivery line. May not apply to blood line.
- a blood removal line and the blood supply line it may be described as a blood line for convenience.
- “within a specific range with respect to the blood removal amount” means within a range set with respect to the blood removal amount. This is expressed by a flow rate difference (for example, an upper limit flow rate difference or a lower limit flow rate difference) or a ratio.
- the blood removal rate measurement means includes, of course, measurement means for measuring the blood removal amount itself, but measurement for measuring various blood removal volume parameters for specifying the blood removal amount. Including means.
- the blood removal volume parameter is a parameter that fluctuates in accordance with the blood removal volume, as a matter of course, including the blood removal volume itself. That is, for example, the flow rate of blood that has been removed when the flow path cross-sectional area of the blood removal line is known, and the parameters for identifying this flow rate (for example, changes in the frequency of ultrasound) Various parameters for specifying are included.
- the blood flow rate parameter is calculated without calculating the blood flow loss. It is also included that the blood pump is directly controlled based on the measured value.
- the control unit determines that the blood flow rate flowing through the blood flow line is based on the blood flow parameter measured by the blood flow measuring unit.
- the blood flow rate by the blood pump is controlled so as to be synchronized with the flowing blood flow rate.
- the blood circulation system based on the blood removal parameter measured by the blood removal measurement unit, the blood flow flowing through the blood supply line is synchronized with the blood removal flowing through the blood removal line. Since the control unit controls the amount of blood flow by the blood pump, blood of the same amount as the removed blood can be sent to the human body. As a result, even when the blood removal amount fluctuates, an amount of blood equal to the amount of blood removed is sent to the human body, and blood at an appropriate flow rate can be circulated stably.
- the phrase “the blood flow rate flowing through the blood removal line is synchronized with the blood flow loss flowing through the blood removal line” means that the blood flow rate by the blood pump is made equal to the blood removal rate. That is, for example, an error caused by a time lag of the control signal output to the blood pump and the response time of the blood pump is allowed.
- the term “synchronized” includes not only the case where the blood removal amount and the amount of blood flow are completely matched, but also the case where they almost match.
- the term “synchronized” also includes the case where blood is fed by an amount equal to the amount of blood removed after a preset time by a blood pump.
- the third aspect includes a correction processing setting unit, and the control unit uses a blood pump based on the correction processing data input to the correction processing setting unit. It correct
- the correction processing setting unit is provided, and the control unit converts the blood flow rate by the blood pump based on the correction processing data input to the correction processing setting unit. Correct to correspond to. Therefore, for example, the combination of the blood flow rate measuring means and the blood pump is changed, and due to the individual difference between the blood flow rate measuring means and the blood pump, the blood pump is controlled by the blood flow parameter. When the blood flow volume does not correspond to the blood removal volume, it can be corrected efficiently so that the blood flow volume corresponds to the blood removal volume.
- a blood pump is provided with a roller pump, and the control unit is a roller based on the blood flow parameter measured by the blood flow measuring means. Control the number of revolutions of the pump.
- the roller pump is provided as the blood pump, and the control unit controls the rotation speed of the roller pump based on the blood flow parameter measured by the blood flow measuring means. It is possible to secure a stable blood flow rate by controlling the rotation speed.
- a fifth aspect of the present invention in the first to third aspects, includes blood flow measuring means provided in the blood supply line, and the control unit measures the blood flow measured by the blood flow measuring means.
- the blood delivery pump is controlled by comparing the parameter and the blood removal volume parameter measured by the blood removal volume measurement means.
- the blood flow measuring means provided in the blood supply line is provided, and the blood flow parameter measured by the blood flow measuring means and the removal measured by the blood removal measuring means. Since the control unit controls the blood pump in comparison with the blood flow parameter, the difference between the blood flow and the blood flow can be efficiently reduced. As a result, a stable blood circulation can be performed by efficiently matching the blood flow rate with the blood removal rate.
- the blood flow measurement means includes, of course, measurement means for measuring the blood flow itself, but is a measurement for measuring various blood removal parameters for specifying the blood flow. Including means.
- the blood flow parameter is a parameter that fluctuates corresponding to the blood flow rate, as a matter of course, including the blood flow rate itself. That is, for example, when the flow cross-sectional area of the blood supply line is known, the flow rate of the blood that has been sent, and the parameters for specifying this flow rate (for example, changes in the frequency of the ultrasound) Various parameters for specifying are also included in the blood flow parameter.
- the comparison between the blood flow parameter and the blood flow parameter is to compare when the blood flow parameter and the blood flow parameter are the same type, and the types of the blood flow parameter and the blood flow parameter are different. In some cases, these may include direct comparison of these, or conversion of either or both into a comparable form.
- a centrifugal pump is provided as a blood pump, and the control unit controls the rotation speed of the centrifugal pump.
- the centrifugal pump is provided as the blood pump, and the blood flow parameter measured by the blood flow measuring means is compared with the blood flow parameter measured by the blood flow measuring means. Since the control unit controls the rotation speed of the centrifugal pump, the blood flow rate corresponding to the blood removal rate can be quickly and stably sent.
- the blood removal line is provided with a flow rate adjusting means.
- the flow rate adjusting means is provided in the blood removal line, the blood flow rate can be adjusted efficiently.
- the blood flow adjusting means is provided in both the blood removal line and the blood supply line.
- the flow rate adjusting means is provided in both the blood removal line and the blood supply line, the blood flow rate can be adjusted efficiently. Further, when the blood pump is a centrifugal pump, it is possible to prevent blood from flowing backward when the centrifugal pump is stopped.
- blood can be fed in such a manner that the blood flow rate by the blood pump is associated with the blood removal rate.
- blood can be circulated stably.
- FIG. 1 is a circuit diagram illustrating a schematic configuration of a heart-lung machine according to a first embodiment of the present invention. It is a block diagram explaining the schematic structure of the control part of the heart-lung machine concerning the 1st Embodiment of this invention. It is a flowchart explaining the operation
- FIG. 1 is a schematic configuration diagram for explaining a heart-lung machine according to a first embodiment of the present invention.
- Reference numeral 100 denotes a heart-lung machine
- numeral 111 denotes a blood flow sensor
- numeral 120 denotes a roller pump
- Reference numeral 140 denotes a control unit
- reference numeral 160 denotes a correction processing setting unit.
- the oxygenator 100 includes, for example, a blood removal line 101, a reservoir 102, a blood line 103, a first blood supply line (blood supply line) 104, an oxygenator 105, 2 blood supply line (blood supply line) 106, blood removal rate sensor (blood removal rate measurement means) 111, roller pump (blood supply pump) 120, blood removal regulator (flow rate adjustment means) 121, and control unit 140 and a correction processing setting unit 160.
- the blood removal line 101, the reservoir 102, the blood line 103, the roller pump 120, the first blood supply line 104, the oxygenator 105, and the second blood supply line 106 are connected in this order, and the blood removal line 101
- the blood removal regulator 121 and the blood removal volume sensor 111 are arranged in this order.
- the blood removed through the blood removal line 101 is circulated to the patient (human body) P via the first blood supply line 104 and the second blood supply line 106.
- the blood removal line 101 is composed of, for example, a tube formed of a resin such as polyvinyl chloride. One end of the blood removal line 101 can be connected to the patient P, and the blood received from the vein is transferred to the reservoir 102. Further, the blood removal line 101 is provided with a sensor or the like (not shown) for monitoring the blood concentration or oxygen concentration as necessary. Note that the above-described sensor or the like may be provided in the blood line 103 and the first blood supply line 104 instead of the blood removal line 101.
- the reservoir 102 has a tank inside, and temporarily stores the transferred blood. Further, for example, a suction line (not shown) for sucking blood in the surgical field of the patient P and a vent line (not shown) for sucking blood in the right heart chamber are connected to the reservoir 102. Yes.
- the blood line 103 has the same configuration as the blood removal line 101, the upstream is connected to the reservoir 102 and the downstream is connected to the roller pump 120, and the blood received from the reservoir 102 is transferred to the roller pump 120.
- the roller pump 120 includes, for example, a rotating roller and a tube formed of a flexible resin that is disposed outside the rotating roller, and the rotating roller rotates to squeeze the tube and suck blood out.
- the blood stored in the reservoir 102 is sucked through the blood line 103, and the blood is transferred to the oxygenator 105 through the first blood supply line 104.
- the roller pump 120 controls the rotation speed of the rotation roller by the rotation control signal output from the control unit 140, and sucks and delivers blood according to the rotation speed of the rotation roller.
- the first blood supply line 104 has the same configuration as the blood removal line 101, and the upstream is connected to the roller pump 120, the downstream is connected to the oxygenator 105, and the blood sent from the roller pump 120. Is transferred to the oxygenator 105.
- the artificial lung 105 includes, for example, a hollow fiber membrane or a flat membrane excellent in gas permeability, and discharges carbon dioxide in blood to add oxygen.
- the oxygenator 105 is integrally formed with a heat exchanger for adjusting the temperature of blood, for example.
- the second blood supply line 106 has the same configuration as the blood removal line 101, receives blood from which oxygen is added by discharging carbon dioxide from the oxygenator 105, and transfers it to the artery of the patient P.
- the second blood supply line 106 is provided with a filter (not shown) for removing foreign substances in the blood such as thrombus and bubbles.
- the blood removal regulator 121 is provided in the blood removal line 101, and includes, for example, a clamper 121A including a pair of clamp members, a servo motor (not shown) that operates the clamper 121A, and a blood removal regulator operation unit 121B. Yes.
- the operator manually operates the blood removal regulator operation unit 121B, adjusts the clamp amount (clamping amount) of the clamper 121A with a servo motor, and changes the cross-sectional area of the blood removal line 101 to change the blood removal line 101. Adjust the flowing blood flow.
- the blood removal rate sensor (blood removal rate measurement means) 111 is provided in the blood removal line 101 and controls, for example, a blood removal rate parameter signal measured using an ultrasonic sensor that measures the flow velocity of blood using ultrasonic waves. To part 140.
- FIG. 2 is a block diagram illustrating a schematic configuration of the control unit 140 according to the first embodiment.
- the control unit 140 includes, for example, a blood removal volume parameter signal reception unit 141, a blood removal flow calculation unit 142, a roller pump control amount calculation unit 143, a roller pump control unit 144, and a correction processing data reception unit 151. ing.
- control unit 140 is connected to the blood removal rate sensor 111, the correction processing setting unit 160, and the roller pump 120 by a cable.
- the correction processing setting unit 160 includes, for example, a measurement error for each individual of the blood removal rate sensor 111, a difference in blood flow characteristics (relationship between the rotation speed and the blood flow rate) for each individual of the roller pump 120, and a blood removal rate.
- Correction data can be set.
- the correction processing data is preferably defined by, for example, a deviation amount (for example, an offset amount, a ratio, etc.) of the blood flow rate with respect to the blood flow loss.
- the correction process setting unit 160 outputs a correction process execution instruction for executing the correction process.
- the correction processing data includes, for example, the previously confirmed measurement error of the blood removal rate sensor 111, the blood flow rate characteristics (relationship between the rotation speed and the blood flow rate) for each roller pump 120, and the like. It is preferable to set based on at least one of the deviation from the basic blood flow characteristic of the roller pump 120. Further, the correction processing data may be set based on, for example, increase / decrease of the liquid level in the reservoir 102 that occurs after the start of blood circulation.
- the blood removal volume parameter signal receiving unit 141 is connected to the blood removal volume sensor 111 and receives the blood removal volume parameter signal sent from the blood removal volume sensor 111.
- the blood removal amount calculation unit 142 calculates the blood removal amount based on the signal sent from the blood removal amount parameter signal reception unit 141. Specifically, for example, the blood removal rate can be calculated from the product of the blood removal flow rate (flow rate parameter) calculated from the blood removal flow rate parameter signal and the flow passage area of the blood removal line 101.
- the correction process data receiving unit 151 receives the correction process data and the correction process execution instruction set in the correction process setting unit 160 from the correction process setting unit 160.
- the roller pump control amount calculation unit 143 is based on the blood removal amount received from the blood removal amount calculation unit 142 (for example, to synchronize the blood flow amount by the roller pump 120 with the blood removal amount (basic blood flow amount). Calculate the number of revolutions (based on the characteristics).
- the rotation speed based on the basic blood flow characteristics is, for example, a data table indicating the relationship between the rotation speed of the roller pump 120 and the blood flow volume, or a calculation indicating the relationship between the rotation speed of the roller pump 120 and the blood flow volume. It can be calculated using an equation. Then, the number of rotations output to the roller pump 120 is calculated based on the number of rotations based on the basic blood flow characteristics and the correction processing data received from the correction processing data receiving unit 151.
- synchronizing the blood flow rate by the roller pump 120 with the blood removal rate means that the blood flow rate is within a specific range with respect to the blood flow loss (for example, a range indicated by a ratio to the blood flow loss or a flow rate with respect to the blood flow loss). This is one mode of control within the range indicated by the difference.
- the roller pump control unit 144 outputs a signal corresponding to the control amount (corrected rotation speed) received from the roller pump control amount calculation unit 143 to the roller pump 120.
- FIG. 3 is a flowchart for explaining the operation procedure of the control unit 140 when the correction process is not used in the oxygenator 100.
- the control unit 140 receives a blood removal volume parameter signal (S11).
- the control unit 140 calculates a blood removal amount based on the received blood removal parameter signal (S12).
- the control unit 140 calculates a control amount (number of rotations) based on, for example, basic blood flow characteristics of the roller pump 120 based on the received blood removal amount (S13).
- the control unit 140 outputs a signal corresponding to the control amount to the roller pump 120 (S14).
- S14 is executed, the process proceeds to S11.
- the above S11 to S14 are repeatedly executed at a predetermined cycle until, for example, the operation is completed and the blood circulation is completed.
- FIG. 4 is a flowchart for explaining an operation procedure of the control unit 140 when the correction process is used in the oxygenator 100.
- the control unit 140 receives a blood removal volume parameter signal (S21).
- the control unit 140 calculates a blood removal amount based on the received blood removal parameter signal (S22).
- the control unit 140 calculates the rotation speed based on the basic blood flow characteristics of the roller pump 120 based on the received blood removal volume (S23).
- the control unit 140 receives correction processing data (S24).
- the control unit 140 corrects the rotation speed based on the basic blood flow characteristic of the roller pump 120 calculated in S23 based on the correction processing data, and outputs the correction to the roller pump 120.
- the amount (rotated speed after correction) is calculated (S25).
- the control unit 140 outputs a signal corresponding to the control amount (corrected rotation speed) to the roller pump 120 (S26).
- S26 is executed, the process proceeds to S21.
- the above S21 to S26 are repeatedly executed at a predetermined cycle until, for example, the operation is completed and the blood circulation is completed.
- the control part 140 controls the roller pump 120 so that the blood flow rate by the roller pump 120 may synchronize with the blood flow rate which flows through the blood removal line 101. . Therefore, an amount of blood suitable for the amount of blood that has been removed can be sent to the patient P via the first blood supply line 104, the artificial lung 105, and the second blood supply line 106. As a result, even when the amount of blood removal varies, blood with an appropriate flow rate can be circulated stably.
- the blood flow sensor is provided with the correction processing setting unit 160, and the control unit 140 is based on the correction processing data input to the correction processing setting unit 160.
- the deviation of the measurement characteristic 111, the blood flow characteristic of the roller pump 120, and the like are corrected. Therefore, according to the heart-lung machine 100 which concerns on 1st Embodiment, the blood flow rate by the roller pump 120 can be efficiently synchronized with the blood removal rate.
- roller pump 120 since the roller pump 120 is provided as a blood pump, it becomes difficult to receive to the influence of a pressure and can supply blood with the stable blood flow volume. .
- the blood removal regulator 121 is provided in the blood removal line 101, the blood flow rate which removes blood via the blood removal line 101 is adjusted suitably. .
- the artificial heart-lung machine 100 includes the reservoir 102, the artificial heart-lung machine 100 can adjust the blood flow rate to synchronize with the de-blood flow rate or to a specific range. The generation of negative pressure is suppressed. Therefore, the artificial heart-lung machine 100 of FIG. 1 may be used as an auxiliary circulation device (blood circulation system) without the reservoir 102 and by applying the roller pump 120.
- auxiliary circulation device blood circulation system
- FIG. 5 is a schematic configuration diagram for explaining the heart-lung machine according to the first embodiment of the present invention, in which reference numeral 200 denotes an artificial heart-lung machine, reference numeral 112 denotes a blood flow sensor (blood flow measuring means), Reference numeral 220 denotes a centrifugal pump (blood feeding pump), reference numeral 260 denotes a correction processing setting unit, and reference numeral 240 denotes a control unit.
- reference numeral 200 denotes an artificial heart-lung machine
- reference numeral 112 denotes a blood flow sensor (blood flow measuring means)
- Reference numeral 220 denotes a centrifugal pump (blood feeding pump)
- reference numeral 260 denotes a correction processing setting unit
- reference numeral 240 denotes a control unit.
- the oxygenator 200 includes, for example, a blood removal line 101, a reservoir 102, a blood line 103, a centrifugal pump 220, a first blood supply line (blood supply line) 104, and an artificial line. Lung 105, second blood supply line (blood supply line) 106, blood removal rate sensor 111, blood flow rate sensor 112, blood removal regulator (flow rate adjusting means) 121, blood supply regulator 122, and control Unit 240 and a correction processing setting unit 260.
- the blood removal line 101, the reservoir 102, the blood line 103, the centrifugal pump 220, the first blood supply line 104, the oxygenator 105, and the second blood supply line 106 are connected in this order.
- the blood removal regulator 121 and the blood flow sensor 111 are arranged in this order, and the blood supply regulator 122 and the blood flow sensor 112 are arranged in this order on the first blood supply line 104.
- the blood removal line 101, the reservoir 102, the blood line 103, the first blood supply line 104, the artificial lung 105, the second blood supply line 106, the blood removal flow rate sensor 111, and the blood removal regulator 121 are Since it is the same as that of embodiment, description is abbreviate
- the blood flow sensor (blood flow measuring means) 112 for example, an ultrasonic sensor is used similarly to the blood flow sensor 111, and the measurement result is sent to the control unit 240.
- the centrifugal pump 220 rotates the impeller blades by, for example, an AC servo motor or a DC servo motor, sucks blood stored in the reservoir 102 through the blood line 103, and passes through the first blood supply line 104. Transfer to oxygenator 105.
- the rotation speed of the centrifugal pump 220 is controlled by feedback control so that the blood flow measured by the blood flow sensor 112 is synchronized with the blood flow measured by the blood flow sensor 111.
- the blood supply regulator 122 is provided in the first blood supply line 104.
- a clamper 122A composed of a pair of clamp members, a servo motor (not shown) that operates the clamper 122A, a blood supply regulator operation unit 122B, It has. Then, the operator manually operates the blood supply regulator operation unit 122B, adjusts the clamp amount (clamping amount) of the clamper 122A by a servo motor, and closes the first blood supply line 104, whereby the centrifugal pump Prevents backflow of blood when 220 is stopped.
- FIG. 6 is a block diagram illustrating a schematic configuration of the control unit 240 according to the second embodiment.
- the control unit 240 includes, for example, a blood removal volume parameter signal reception unit 141, a blood removal volume calculation unit 142, a centrifugal pump control amount calculation unit 243, a centrifugal pump control unit 244, and a blood flow rate parameter signal reception unit 245.
- the blood flow rate calculation unit 246 and the correction processing data reception unit 151 are provided.
- control unit 240 is connected to the blood removal rate sensor 111, the blood flow rate sensor 112, the correction processing setting unit 260, and the centrifugal pump 220 by cables.
- the blood removal volume parameter signal reception unit 141 the blood removal volume calculation unit 142, and the correction processing data reception unit 151 are the same as those in the first embodiment, and thus description thereof is omitted.
- the centrifugal pump 220 in the second embodiment is feedback control, there is little need to consider the blood flow error caused by the blood flow characteristic.
- the blood removal rate sensor 111 and the blood flow rate sensor 112 have different measurement characteristics for each individual. Therefore, if the measurement characteristics (measurement error, etc.) of the blood removal rate sensor 111 and the blood flow rate sensor 112 are different, due to the combination of the blood removal rate sensor 111 and the blood flow rate sensor 112, the blood flow rate and the blood removal rate Deviation may occur. Therefore, it is preferable to correct a deviation between the blood flow rate and the blood flow loss caused by the combination of the blood flow rate sensor 111 and the blood flow rate sensor 112.
- the correction processing setting unit 260 corrects a deviation caused by the combination of the blood removal rate sensor 111 and the blood flow rate sensor 112, and the blood flow rate temporarily increases or decreases with respect to the blood loss rate. Correction processing data for correcting this is set.
- the correction processing data is preferably defined by, for example, a deviation amount (for example, an offset amount, a ratio, etc.) of the blood flow rate with respect to the blood removal rate.
- the correction process data may be defined by another method as long as the blood flow rate by the centrifugal pump 220 can be within a specific range with respect to the blood removal rate.
- the correction process setting unit 260 outputs a correction process execution instruction for executing the correction process.
- the correction processing data is preferably set based on, for example, a deviation amount between the measurement characteristic of the blood removal rate sensor 111 and the measurement characteristic of the blood flow rate sensor 112 that has been confirmed in advance. Further, the correction processing data may be set based on, for example, increase / decrease of the liquid level in the reservoir 102 that occurs after the start of blood circulation.
- the blood flow parameter signal receiving unit 245 is connected to the blood flow sensor 112 and receives the blood flow parameter signal sent from the blood flow sensor 112.
- the blood flow rate calculation unit 246 calculates the blood flow rate based on the signal sent from the blood flow rate parameter signal reception unit 245. Specifically, for example, the blood flow rate is calculated from the product of the blood flow rate (flow rate parameter) calculated from the blood flow rate parameter signal and the flow area of the first blood flow line 104.
- the centrifugal pump control amount calculation unit 243 first calculates a target blood flow rate for synchronizing the blood flow rate by the centrifugal pump 220 with the blood flow rate, based on the blood flow rate received from the blood removal rate calculation unit 142. . Next, the target blood flow rate is corrected based on the correction processing data received from the correction processing data receiving unit 151, and the corrected target blood flow rate is calculated. By comparing the corrected target blood flow rate with the blood flow rate received from the blood flow rate calculation unit 246, the centrifugal pump control amount calculation unit 243 determines the control amount (corrected rotation speed) to be output to the centrifugal pump 220. Increase or decrease.
- synchronizing the blood flow with the blood removal by the centrifugal pump 220 means that the blood flow is within a specific range with respect to the blood removal (for example, a range indicated by a ratio to the blood flow or a flow rate with respect to the blood removal) This is one mode of control within the range indicated by the difference. Further, the centrifugal pump 220 may be controlled by the number of rotations when there is no deviation in the measurement characteristics without performing the correction process.
- the correction process data receiving unit 151 receives the correction process data and the correction process execution instruction set in the correction process setting unit 260 from the correction process setting unit 260.
- the centrifugal pump control unit 244 outputs a signal corresponding to the rotation speed to the centrifugal pump 220 based on the control amount (corrected rotation number) received from the centrifugal pump control amount calculation unit 243.
- FIG. 7 is a flowchart illustrating an operation procedure of the control unit 240 when the correction process is not used in the oxygenator 200.
- the control unit 240 receives a blood removal volume parameter signal (S31).
- the control unit 240 calculates a blood removal amount based on the received blood removal parameter signal (S32).
- the control unit 240 calculates a target blood flow rate (S33).
- the controller 240 receives a blood flow parameter signal (S34).
- the control unit 240 calculates the blood flow (S35). (6) Next, by comparing the target blood flow rate calculated in S33 with the blood flow rate calculated in S35, for example, (target blood flow rate ⁇ blood flow rate) is calculated, and (target blood flow rate) The control unit 240 determines whether or not ⁇ (blood flow rate) (S36). If (target blood flow rate ⁇ blood flow rate) (S36: Yes), the process proceeds to S37, and if not (target blood flow rate ⁇ blood flow rate) (S36: No), the process proceeds to S38.
- FIG. 8 is a flowchart for explaining the operation procedure of the control unit 240 when the correction process is used in the oxygenator 200.
- the control unit 240 receives a blood removal volume parameter signal (S41).
- the control unit 240 calculates the blood removal amount based on the received blood removal amount parameter signal (S42).
- the control unit 240 calculates a target blood flow rate based on the blood removal rate calculated in S42 (S43).
- the control unit 240 receives correction processing data (S44).
- the control unit 240 corrects the target blood flow rate based on the correction processing data, and calculates a corrected target blood flow rate (S45).
- the controller 240 receives a blood flow parameter signal (S46).
- the control unit 240 calculates the blood flow rate based on the received blood flow rate parameter signal (S47).
- the corrected target blood flow rate corrected in S45 is compared with the blood flow rate calculated in S47, for example, (corrected target blood flow rate ⁇ blood flow rate) is calculated, The control unit 240 determines whether or not (corrected target blood flow rate ⁇ blood flow rate) (S48).
- the control unit 240 synchronizes the blood flow to be sent to the first blood feed line 104 with the blood flow to be removed from the blood removal line 101. Since the adjustment is performed, the same amount of blood as the removed blood can be sent to the patient P. As a result, even if the blood removal amount varies, an appropriate blood flow rate corresponding to the blood removal amount can be ensured, and appropriate blood circulation can be performed.
- the correction processing setting unit 260 is provided, and the control unit 240 is based on the correction processing data input to the correction processing setting unit 260 to remove the blood flow rate sensor. Since the deviation of the measurement characteristics of 111 and the blood flow sensor 112 is corrected, the blood flow by the centrifugal pump 220 can be efficiently synchronized with the blood removal.
- the blood pump is constituted by the centrifugal pump 220, a stable blood flow can be rapidly fed.
- the blood removal regulator 121 is provided in the blood removal line 101, so that the blood removal amount is appropriately adjusted.
- the blood supply regulator 122 is provided in the first blood supply line 104, when the centrifugal pump 220 stops, the first blood supply line 104 is blocked to prevent blood from flowing backward. be able to.
- this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of invention, it can change variously.
- the blood flow rate is synchronized with the blood removal rate in the oxygenator 100 or 200 has been described.
- the blood flow rate is adjusted to be in a specific range with respect to the blood flow loss. May be.
- the case where the heart-lung machine 100, 200 includes the correction processing setting units 160, 260 has been described.
- whether the correction processing setting units 160, 260 are included can be arbitrarily set. it can.
- the correction processing setting units 160 and 260 are provided, for example, the correction processing setting units 160 and 260 may be detachably provided outside.
- the blood removal rate sensor 111 and the blood flow rate sensor 112 that measure the blood flow velocity are used as the blood removal rate measurement unit and the blood flow rate measurement unit, respectively.
- the case where an ultrasonic sensor is used as the blood removal rate sensor 111 and the blood flow rate sensor 112 has been described.
- various known types using lasers, infrared rays, or the like are used.
- the flow rate measuring means may be used.
- the blood pump is the roller pump 120 and the centrifugal pump 220 has been described in the above embodiment, other blood pumps may be used.
- the first blood flow line 104 and the second blood flow line 106 are flow sensors such as an ultrasonic sensor. (Flow parameter measurement means) may be provided as appropriate.
- the case where the blood removal regulator 121 is provided as the flow rate adjusting unit, and the blood removal regulator 121 and the blood supply regulator 122 are provided in the second embodiment has been described.
- neither the blood removal regulator 121 nor the blood supply regulator 122 need be provided, and when the flow rate adjusting means is provided, either the blood removal regulator 121 or the blood supply regulator 122 is used. Whether to provide both or both, or whether to provide the blood removal regulator 121 and the blood supply regulator 122 in the blood removal line or the blood supply line can be appropriately set.
- a flow rate adjusting means other than the blood removal regulator 121 and the blood supply regulator 122 may be provided.
- the case where the blood supply regulator 122 and the blood flow sensor 112 are arranged in this order on the first blood supply line 104 has been described.
- the first blood supply line 104 is described.
- the second blood supply line 106 may be disposed.
- the blood flow sensor 112 and the blood regulator 122 may be arranged in this order.
- FIG.3 Although the example of schematic structure of the flowchart for controlling the roller pump 120 which concerns on this invention, and the centrifugal pump 220 was shown in FIG.3, FIG.4, FIG.7, FIG. You may control using methods (algorithms) other than a flowchart.
- auxiliary circulation device blood circulation system
- a cardiopulmonary apparatus that does not include a reservoir in cardiac surgery, etc. You may apply other than a cardiopulmonary apparatus.
- the blood circulation system according to the present invention can stably deliver blood at an appropriate flow rate when the removed blood is circulated by the blood delivery pump.
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Abstract
Description
本願は、2014年8月20日に、日本に出願された特願2014-167559号及び2015年3月17日に、日本に出願された特願2015-53600号に基づき優先権を主張し、その内容をここに援用する。
リザーバ502は、内部に槽を有していて、移送されてきた血液を一時的に貯留する。
第2の送血ライン507は、人工肺506において二酸化炭素を排出して酸素を付加された血液を受け取って、患者Pの動脈に移送する。
そこで、例えば、特許文献1には、人工心肺装置による脱血流量の調整を正確かつ簡易に操作するために、脱血ライン501を挟んで変形させることにより、脱血流量を調整する技術が開示されている。
本発明に係る第一の態様は、人体に接続可能とされ、脱血された血液を送血ポンプによって人体に送血する血液循環システムであって、送血ポンプと、脱血された血液が送血ポンプに向かう脱血ラインと、送血ポンプから送られる血液を人体に向かって移送する送血ラインと、脱血ラインに設けられた脱血流量測定手段と、制御部と、を備え、制御部は、脱血流量測定手段が測定した脱血流量パラメータに基づいて、送血ラインを流れる送血流量が脱血ラインを流れる脱血流量に対して特定範囲内となるように、送血ポンプによる送血流量を制御する。
その結果、脱血流量が変動した場合でも、脱血流量に対して特定範囲内の血液が人体に送血され、適切な流量の血液を安定して循環させることができる。
また、脱血ライン及び送血ラインのうちの一部分を指す場合においても、便宜上、血液ラインと記載する場合がある。
その結果、脱血流量が変動した場合でも、脱血した量と等しい量の血液が人体に送血され、適切な流量の血液を安定して循環させることができる。
また、同期するとは、脱血流量と送血流量が完全に一致する場合は勿論のこと、ほぼ一致する場合を含む。
また、同期するとは、送血ポンプによって、予め設定された時間だけ遅れて脱血流量と等しい量の血液を送血する場合も含む。
その結果、送血流量を効率的に脱血流量と対応させて、安定した血液循環を行うことができる。
その結果、脱血流量が変動した場合であっても、適切な流量の血液を安定して循環させることができる。
以下、図1~図3を参照して、本発明の第1の実施形態に係る人工心肺装置(血液循環システム)について説明する。
図1は、本発明の第1の実施形態に係る人工心肺装置を説明する概略構成図であり、符号100は人工心肺装置を、符号111は脱血流量センサを、符号120はローラポンプを、符号140は制御部を、符号160は補正処理設定部を示している。
そして、脱血ライン101を介して脱血された血液は、第1の送血ライン104、第2の送血ライン106を介して患者(人体)Pに循環される。
また、脱血ライン101には、必要に応じて血液の濃度や酸素の濃度をモニターするためのセンサ等(不図示)が設けられている。なお、上記センサ等は、脱血ライン101に代えて、血液ライン103、第1の送血ライン104に設けてもよい。
また、リザーバ102には、例えば、患者Pの手術野における血液を吸引するためのサクションライン(不図示)、及び右心腔内における血液を吸引するためのベントライン(不図示)が接続されている。
なお、人工肺105は、例えば、血液の温度を調整するための熱交換器が一体に形成されている。
なお、第2の送血ライン106には、例えば、血栓や気泡など血液中の異物を取り除くためのフィルター(不図示)が設けられている。
制御部140は、例えば、脱血流量パラメータ信号受付部141と、脱血流量算出部142と、ローラポンプ制御量算出部143と、ローラポンプ制御部144と、補正処理データ受付部151とを備えている。
また、補正処理データは、例えば、脱血流量に対する送血流量のずれ量(例えば、オフセット量、比率等)により定義することが好適であるが、ローラポンプ120による送血流量を脱血流量に対して特定範囲内とすることが可能であれば、他の手法により定義されていてもよい。
また、この実施形態において、補正処理設定部160は、補正処理を実行する際の補正処理実行指示を出力する。
また、補正処理データは、例えば、血液循環開始後に生じたリザーバ102における液位の増減に基づいて設定してもよい。
そして、基本的な送血流量特性に基づく回転数と補正処理データ受付部151から受け取った補正処理データに基づいてローラポンプ120に出力する回転数を算出する。
(1)まず、制御部140は、脱血流量パラメータ信号を受け取る(S11)。
(2)次に、制御部140は、受取った脱血流量パラメータ信号に基づいて脱血流量を算出する(S12)。
(3)次いで、制御部140は、受取った脱血流量に基づいて、例えば、ローラポンプ120の基本的な送血流量特性に基づく制御量(回転数)を算出する(S13)。
(4)次に、制御部140は、ローラポンプ120に対して制御量と対応する信号を出力する(S14)。
S14が実行されたら、S11に移行される。
上記S11~S14は、例えば、手術が完了して血液循環を終了するまで、所定の周期で繰り返し実行される。
(1)まず、制御部140は、脱血流量パラメータ信号を受け取る(S21)。
(2)次に、制御部140は、受取った脱血流量パラメータ信号に基づいて脱血流量を算出する(S22)。
(3)次いで、制御部140は、受取った脱血流量に基づいて、ローラポンプ120の基本的な送血流量特性に基づく回転数を算出する(S23)。
(4)次に、制御部140は、補正処理データを受け取る(S24)。
(5)次いで、制御部140は、S23で算出されたローラポンプ120の基本的な送血流量特性に基づく回転数を、補正処理データに基づいて補正して、ローラポンプ120に対し出力する制御量(補正後回転数)を算出する(S25)。
(6)次に、制御部140は、ローラポンプ120に対して制御量(補正後回転数)と対応する信号を出力する(S26)。
S26が実行されたら、S21に移行される。
上記S21~S26は、例えば、手術が完了して血液循環を終了するまで、所定の周期で繰り返し実行される。
その結果、脱血流量が変動した場合であっても、適切な流量の血液を安定して循環させることができる。
次に、図5~図8を参照して、本発明の第2の実施形態に係る人工心肺装置(血液循環システム)について説明する。
図5は、本発明の第1の実施形態に係る人工心肺装置を説明する概略構成図であり、符号200は人工心肺装置を、符号112は送血流量センサ(送血流量測定手段)を、符号220は遠心ポンプ(送血ポンプ)を、符号260は補正処理設定部を、符号240は制御部を示している。
制御部240は、例えば、脱血流量パラメータ信号受付部141と、脱血流量算出部142と、遠心ポンプ制御量算出部243と、遠心ポンプ制御部244と、送血流量パラメータ信号受付部245と、送血流量算出部246と、補正処理データ受付部151とを備えている。
また、補正処理データは、例えば、脱血流量に対する送血流量のずれ量(例えば、オフセット量、比率等)により定義することが好適である。しかしながら、遠心ポンプ220による送血流量を脱血流量に対して特定範囲内とすることが可能であれば、他の手法により補正処理データを定義してもよい。
また、この実施形態において、補正処理設定部260は、補正処理を実行する際の補正処理実行指示を出力する。
また、補正処理データは、例えば、血液循環開始後に生じたリザーバ102における液位の増減に基づいて設定されてもよい。
また、補正処理をせずに上記測定特性のずれがないとした場合における回転数により遠心ポンプ220を制御してもよい。
(1)まず、制御部240は、脱血流量パラメータ信号を受け取る(S31)。
(2)次に、制御部240は、受取った脱血流量パラメータ信号に基づいて脱血流量を算出する(S32)。
(3)次いで、S32において算出した脱血流量に基づいて、制御部240は、目標送血流量を算出する(S33)。
(4)次に、制御部240は、送血流量パラメータ信号を受け取る(S34)。
(5)次いで、受取った送血流量パラメータ信号に基づいて、制御部240は、送血流量を算出する(S35)。
(6)次いで、S33で算出した目標送血流量と、S35で算出した送血流量とを比較して、例えば、(目標送血流量-送血流量)を算出して、(目標送血流量≧送血流量)であるかどうかを、制御部240は判断する(S36)。
(目標送血流量≧送血流量)である場合(S36:Yes)はS37に移行され、(目標送血流量≧送血流量)でない場合(S36:No)はS38に移行される。
(7)S36における差異(=(目標送血流量-送血流量))に基づいて、制御部240は、遠心ポンプ220に対する制御量(増加回転数)を算出する(S37)。
なお、目標送血流量=送血流量である場合には、制御量(増加回転数)をゼロとする。
(8)S36における差異(=(目標送血流量-送血流量))に基づいて、制御部240は、遠心ポンプ220に対する制御量(減少回転数)を算出する(S38)。
(9)次に、制御部240は、遠心ポンプ220に対してS37又はS38で算出した制御量と対応する信号を出力する(S39)。
S39が実行されたら、S31に移行される。
上記S31~S39は、例えば、手術が完了して血液循環を終了するまで、所定の周期で繰り返し実行される。
(1)まず、制御部240は、脱血流量パラメータ信号を受け取る(S41)。
(2)次に、制御部240は、受取った脱血流量パラメータ信号に基づいて脱血流量を算出する(S42)。
(3)次いで、制御部240は、S42において算出した脱血流量に基づいて目標送血流量を算出する(S43)。
(4)次に、制御部240は、補正処理データを受け取る(S44)。
(5)次いで、制御部240は、補正処理データに基づいて、目標送血流量を補正処理して、補正後目標送血流量を算出する(S45)。
(6)次に、制御部240は、送血流量パラメータ信号を受け取る(S46)。
(7)次いで、制御部240は、受取った送血流量パラメータ信号に基づいて送血流量を算出する(S47)。
(8)次に、S45で補正した補正後目標送血流量と、S47で算出した送血流量とを比較して、例えば、(補正後目標送血流量-送血流量)を算出して、制御部240は、(補正後目標送血流量≧送血流量)であるかどうかを判断する(S48)。
(補正後目標送血流量≧送血流量)である場合(S48:Yes)はS49に移行され、(補正後目標送血流量≧送血流量)でない場合(S48:No)はS50に移行される。
(9)S48における差異(=(補正後目標送血流量-送血流量))に基づいて、制御部240は、遠心ポンプ220に対する制御量(増加回転数)を算出する(S49)。
なお、補正後目標送血流量=送血流量である場合には、制御量(増加回転数)をゼロとする。
(10)S48における差異(=(補正後目標送血流量-送血流量))に基づいて、制御部240は、遠心ポンプ220に対する制御量(減少回転数)を算出する(S50)。
(11)次に、制御部240は、遠心ポンプ220に対してS49又はS50で算出した制御量と対応する信号を出力する(S51)。
S51が実行されたら、S41に移行される。
上記S41~S51は、例えば、手術が完了して血液循環を終了するまで、所定の周期で繰り返し実行される。
その結果、脱血流量が変動しても、脱血流量と対応する適切な送血流量を確保することができ、適切な血液循環を行うことができる。
また、第1の送血ライン104に送血レギュレータ122が設けられているので、遠心ポンプ220が停止した際に、第1の送血ライン104を閉塞して、血液が逆流するのを防止することができる。
例えば、上記実施の形態においては、人工心肺装置100、200において、送血流量を脱血流量と同期させる場合について説明したが、送血流量が脱血流量に対して特定範囲となるように調整してもよい。
また、補正処理設定部160、260を備える場合に、例えば、外部に取り外し可能に備えてもよい。
また、流量調整手段として、脱血レギュレータ121、送血レギュレータ122以外の流量調整手段を設けてもよい。
100、200 人工心肺装置(血液循環システム)
101 脱血ライン
102 リザーバ
104 第1の送血ライン(送血ライン)
105 人工肺
106 第2の送血ライン(送血ライン)
111 脱血流量センサ(脱血流量測定手段)
112 送血流量センサ(送血流量測定手段)
120 ローラポンプ(送血ポンプ)
121 脱血レギュレータ(流量調整手段)
122 送血レギュレータ(流量調整手段)
140、240 制御部
160、260 補正処理設定部
220 遠心ポンプ(送血ポンプ)
Claims (8)
- 人体に接続可能とされ、脱血された血液を送血ポンプによって人体に送血する血液循環システムであって、
送血ポンプと、
脱血された血液が前記送血ポンプに向かう脱血ラインと、
前記送血ポンプから送られる血液を人体に向かって移送する送血ラインと、
前記脱血ラインに設けられた脱血流量測定手段と、
制御部と、
を備え、
前記制御部は、
前記脱血流量測定手段が測定した脱血流量パラメータに基づいて、前記送血ラインを流れる送血流量が前記脱血ラインを流れる脱血流量に対して特定範囲内となるように、前記送血ポンプによる送血流量を制御する血液循環システム。 - 請求項1に記載の血液循環システムであって、
前記制御部は、
前記脱血流量測定手段が測定した脱血流量パラメータに基づいて、前記送血ラインを流れる送血流量が前記脱血ラインを流れる脱血流量と同期するように、前記送血ポンプによる送血流量を制御する血液循環システム。 - 請求項1又は2に記載の血液循環システムであって、
補正処理設定部を備え、
前記制御部は、
前記補正処理設定部に入力された補正処理データに基づいて、前記送血ポンプによる送血流量が前記脱血流量と対応するように補正する血液循環システム。 - 請求項1~3のいずれか1項に記載の血液循環システムであって、
前記送血ポンプとしてローラポンプを備え、
前記制御部は、
前記脱血流量測定手段が測定した脱血流量パラメータに基づいて、前記ローラポンプの回転数を制御する血液循環システム。 - 請求項1~3のいずれか1項に記載の血液循環システムであって、
前記送血ラインに設けられた送血流量測定手段を備え、
前記制御部は、
前記送血流量測定手段が測定した送血流量パラメータと前記脱血流量測定手段が測定した脱血流量パラメータとを対比して、前記送血ポンプを制御する血液循環システム。 - 請求項5に記載の血液循環システムであって、
前記送血ポンプとして遠心ポンプを備え、
前記制御部は、
前記遠心ポンプの回転数を制御する血液循環システム。 - 請求項1~6のいずれか1項に記載の血液循環システムであって、
前記脱血ラインに流量調整手段が設けられている血液循環システム。 - 請求項1~3、5、6のいずれか1項に記載の血液循環システムであって、
前記脱血ラインと前記送血ラインの双方に流量調整手段が設けられている血液循環システム。
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