Abdominal compression system, control method, and program

Abstract

To compress decrease in blood pressure of a patient under artificial dialysis.SOLUTION: An abdominal compression apparatus 200 compresses an abdomen of a patient. A lifting detection part 103 detects lifting of a lower extremity of the patient during artificial dialysis of the patient. When the lifting detection part 103 detects lifting of the lower extremity of the patient, a compression control part 104 compresses the abdomen of the patient repeatedly by controlling the abdominal compression apparatus 200.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present disclosure provides an abdominal compression system, control This invention relates to a method and a program. [Background technology]

[0002] Patients with kidney problems may undergo dialysis. Dialysis is a technique that removes waste products and fluids from the body in place of damaged kidneys. During dialysis, fluid is removed from the blood flowing through the blood vessels, which often causes the patient's blood pressure to drop. If the patient's blood pressure drops too much, dialysis cannot be continued.

[0003] Therefore, currently, there are known technologies to prevent a drop in a patient's blood pressure during dialysis. For example, Patent Document 1 describes a system that automatically raises the patient's feet to assume an emergency position when the patient's blood pressure drops during dialysis, raising the patient's feet above the level of the heart. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-225916 Summary of the Invention [Problem to be solved by the invention]

[0005] However, simply elevating the feet above the heart is unlikely to increase the patient's blood pressure. This is because simply elevating the legs causes blood returning to the trunk from the venous system of the lower limbs to pool in the inferior vena cava and abdominal visceral vessels, preventing an increase in cardiac output. For this reason, there is a need for technology to prevent a drop in a patient's blood pressure during dialysis.

[0006] The present disclosure has been made in consideration of the above-mentioned problems, and provides an abdominal compression system that suppresses a drop in blood pressure of a patient during dialysis; controlThe present invention aims to provide a method and a program. [Means for solving the problem]

[0007] In order to achieve the above object, an abdominal compression system according to a first aspect of the present disclosure includes: an abdominal compression means for compressing the patient's abdomen; an elevation detection means for detecting elevation of the patient's lower limbs during dialysis; and a compression control means for controlling the abdominal compression means to repeatedly compress the abdomen of the patient when the lift detection means detects that the patient's lower limbs have been lifted.

[0008] The lift detection means detects a lift height, which is a height to which the patient's lower limbs are lifted, The compression control means may compress the abdomen of the patient with a compression force according to the elevation height detected by the elevation detection means.

[0009] Further provided is a height measuring means for measuring the lift height, The lift detection means may acquire the lift height measured by the height measurement means.

[0010] An angle measuring means is further provided for measuring an elevation angle, which is an angle formed between a direction in which the patient's thigh extends and a horizontal plane, The elevation detection means may acquire the elevation angle from the angle measurement means, and calculate the elevation height based on the elevation angle and the length of the patient's thigh.

[0011] a lower limb lifting means for lifting the lower limbs of the patient; a blood pressure drop detection means for detecting a drop in blood pressure of the patient during artificial dialysis of the patient; The device may further comprise lift control means for controlling the lower limb lifting means to lift the lower limbs of the patient when the blood pressure drop detection means detects a drop in blood pressure of the patient.

[0012] In order to achieve the above object, the present disclosure relates to a second aspect of the present invention. control The method is: A control device for controlling an abdominal compression device that compresses the abdomen of a patient The lift detection means The aforementioned Detecting elevation of a patient's lower limbs during dialysis The process of , compression control means in the control device However, when the lifting detection means detects that the patient's lower limbs are lifted, the abdomen of the patient is repeatedly compressed. and transmitting control information to the abdominal compression device instructing the abdominal compression device to .

[0013] In order to achieve the above object, a program according to a third aspect of the present disclosure includes: Computer, an elevation detection means for detecting elevation of the patient's lower limbs during dialysis; When the lifting detection means detects that the patient's lower limbs have been lifted, the lifting detection means functions as a compression control means for repeatedly compressing the patient's abdomen by controlling an abdominal compression means for compressing the patient's abdomen. [Effects of the Invention]

[0014] According to the present disclosure, a drop in a patient's blood pressure during dialysis can be suppressed. [Brief explanation of the drawings]

[0015] [Figure 1] Configuration diagram of an abdominal compression system according to embodiment 1 [Figure 2] An explanatory diagram of the operation of the abdominal compression system according to the first embodiment. [Figure 3] Configuration diagram of a control device according to the first embodiment [Figure 4] Configuration diagram of an abdominal compression device according to embodiment 1 [Figure 5] External view of the compression garment according to the first embodiment [Figure 6] Configuration diagram of a lower limb lifting device according to embodiment 1 [Figure 7] Illustration of how to measure lift height [Figure 8] Functional configuration diagram of an abdominal compression system according to embodiment 1 [Figure 9] 10 is a flowchart showing an abdominal compression process executed by the control device according to the first embodiment. [Figure 10] Functional configuration diagram of an abdominal compression system according to embodiment 2 [Figure 11] Illustration of how to measure the elevation angle DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals.

[0017] (Embodiment 1) FIG. 1 is a diagram showing the configuration of an abdominal compression system 1000 according to a first embodiment. The abdominal compression system 1000 is a system that compresses the abdomen of a patient 500 undergoing dialysis so as to increase the blood pressure of the patient 500 when the patient's blood pressure drops. The patient 500 has kidney damage and reduced kidney function. The patient 500 has difficulty excreting waste products and water from the body using his or her own kidneys. Therefore, the patient 500 undergoes dialysis to excrete waste products and water from the body.

[0018] During dialysis, water is rapidly removed from the blood flowing in the blood vessels, which can cause a drop in the blood pressure of the patient 500. If the blood pressure of the patient 500 drops too much, it can have adverse effects on the patient's body. Therefore, if the blood pressure of the patient 500 drops during dialysis, the abdominal compression system 1000 repeatedly compresses the abdomen of the patient 500 so that the blood pressure of the patient 500 increases. Specifically, the abdominal compression system 1000 elevates the lower limbs of the patient 500 and then repeatedly compresses the abdomen of the patient 500. Note that elevating the lower limbs of the patient 500 means raising the position of the patient's 500's feet above the position of the patient's 500's heart, as shown in FIG. 2. Furthermore, compressing the abdomen of the patient 500 means applying pressure to the abdomen of the patient 500 from around the abdomen.

[0019] Such an action is expected to have the effect of increasing the blood pressure of the patient 500. In other words, when the lower limbs of the patient 500 are raised, blood is more likely to return from the venous system of the lower limbs of the patient 500 to the trunk of the patient 500. Here, when the abdomen of the patient 500 is repeatedly compressed, the blood that has returned to the trunk of the patient 500 is supplied to the heart. As a result, the cardiac output of the patient 500 increases, and the blood pressure of the patient 500 rises. In this way, raising the lower limbs while compressing the abdomen is expected to increase the blood pressure of the patient 500.

[0020] However, raising the lower limbs without abdominal compression cannot be expected to sufficiently increase the blood pressure of the patient 500. This is because simply raising the lower limbs of the patient 500 causes blood to return from the venous system of the patient's 500 lower limbs to the patient's 500 trunk to pool in the inferior vena cava and abdominal visceral blood vessels, preventing an increase in the cardiac output of the patient 500. The fact that the cardiac output of the patient 500 does not increase simply by raising the lower limbs is described, for example, in the non-patent document: Yamashita Masashi, Aikawa Takeshi, Kitama Masataka, "Basic Study on Temporary Countermeasures for Dialysis Hypotension," Biomedical Engineering, 55(2), pp. 84-90, 2017.

[0021] As shown in Fig. 1, the abdominal compression system 1000 includes a control device 100, an abdominal compression device 200, a lower limb lifting device 300, a blood pressure sensor 410, and a distance measurement sensor 420. The control device 100 is communicably connected to each of the abdominal compression device 200, the lower limb lifting device 300, the blood pressure sensor 410, and the distance measurement sensor 420. Note that Fig. 1 does not show an apparatus that performs dialysis on the patient 500.

[0022] The control device 100 is a device that controls the overall operation of the abdominal compression system 1000. For example, the control device 100 acquires blood pressure information indicating the blood pressure of the patient 500 from the blood pressure sensor 410, and detects a drop in the blood pressure of the patient 500. Furthermore, when the control device 100 detects a drop in the blood pressure of the patient 500, it controls the lower limb lifting device 300 to lift the lower limbs of the patient 500. Furthermore, the control device 100 acquires height information indicating the lifting height, which is the height to which the lower limbs of the patient 500 are lifted, from the distance measurement sensor 420, and detects the lifting of the lower limbs of the patient 500. Furthermore, when the control device 100 detects the lifting of the lower limbs of the patient 500, it controls the abdominal compression device 200 to compress the abdomen of the patient 500.

[0023] The control device 100 may be a dedicated computer specialized for controlling the abdominal compression system 1000, or may be a general-purpose computer such as a smartphone, tablet terminal, laptop computer, etc. As shown in FIG. 3 , the control device 100 includes a control unit 11, a storage unit 12, a display unit 13, an operation reception unit 14, and a communication unit 15.

[0024] The control unit 11 includes a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), RTC (Real Time Clock), etc. The CPU is also called a central processing unit, central arithmetic unit, processor, microprocessor, microcomputer, DSP (Digital Signal Processor), etc., and functions as a central processing unit that executes processes and calculations related to the control of the control device 100. In the control unit 11, the CPU reads programs and data stored in the ROM and uses the RAM as a work area to perform overall control of the control device 100. The RTC is, for example, an integrated circuit with a timekeeping function. The CPU can determine the current date and time from the time information read from the RTC.

[0025] The storage unit 12 includes a nonvolatile semiconductor memory such as a flash memory, an EPROM (Erasable Programmable ROM), or an EEPROM (Electrically Erasable Programmable ROM), and serves as a so-called auxiliary storage device. The storage unit 12 stores programs and data used by the control unit 11 to execute various processes. The storage unit 12 also stores data generated or acquired by the control unit 11 as a result of executing various processes.

[0026] The display unit 13 displays various images under the control of the control unit 11. The display unit 13 includes a touch screen, a liquid crystal display, etc. The operation reception unit 14 receives various operations from the user and supplies information indicating the contents of the received operations to the control unit 11. The operation reception unit 14 includes a touch screen, a button, a lever, etc.

[0027] The communication unit 15 communicates with various devices under the control of the control unit 11. The communication unit 15 communicates with various devices in accordance with various wireless communication standards or various wired communication standards. Examples of various wireless communication standards include Wi-Fi (registered trademark), LTE (Long Term Evolution), 4G (4th Generation), 5G (5th Generation), Bluetooth (registered trademark), Zigbee (registered trademark), etc. Examples of various wired communication standards include USB (Universal Serial Bus, registered trademark), Thunderbolt (registered trademark), etc. The communication unit 15 has a communication interface that complies with various communication standards.

[0028] The abdominal compression device 200 is a device that compresses the abdomen of the patient 500. In this embodiment, the abdominal compression device 200 compresses the abdomen of the patient 500 by adjusting the air pressure inside a compression band 220 attached around the abdomen of the patient 500. In this embodiment, the abdominal compression device 200 repeatedly compresses the abdomen of the patient 500 and releases the compression of the abdomen of the patient 500 at a predetermined cycle. This predetermined cycle is, for example, approximately the same as the respiratory cycle of the patient 500.

[0029] 4, the abdominal compression device 200 includes an air pressure control unit 210, a compression cuff 220, a display unit 230, an operation reception unit 240, a communication unit 250, a compressor 261, an air tank 262, a pressure reducer 263, an electro-pneumatic regulator 264, an exhaust valve 265, a relief valve 266, an air pressure sensor 267, and a compression pressure sensor 268. It should be noted that a compressed air cylinder may be used instead of the compressor 261 and the air tank 262.

[0030] The air pressure control unit 210 controls the overall operation of the abdominal compression device 200. For example, the air pressure control unit 210 controls each unit so that the compression pressure, which is the pressure of the air inside the compression cuff 220 attached to the abdomen of the patient 500, becomes a pressure corresponding to the compression force instructed by the control device 100 via the communication unit 250. The air pressure control unit 210 repeatedly compresses the abdomen of the patient 500 and releases the compression of the abdomen of the patient 500. In other words, the air pressure control unit 210 increases and decreases the compression pressure at a predetermined cycle to repeatedly compress the abdomen of the patient 500.

[0031] In this embodiment, the compression pressure when compressing the abdomen of the patient 500, that is, the compression pressure when the compression cuff 220 is inflated, will be referred to simply as the compression pressure, as appropriate. Similarly, the compression force when compressing the abdomen of the patient 500, that is, the compression force when the compression cuff 220 is inflated, will be referred to simply as the compression force, as appropriate. The air pressure control unit 210 includes a CPU, ROM, RAM, RTC, etc.

[0032] Compression cuff 220 is a belt-shaped member that is worn around the abdomen of patient 500 to compress the abdomen of patient 500. As shown in Fig. 5, compression cuff 220 includes inflatable portion 221, attachment portion 222, attachment portion 223, and air supply tube 224. Compression cuff 220 is formed by connecting inflatable portion 221, attachment portion 222, and attachment portion 223.

[0033] The inflation section 221 is a section that inflates to compress the abdomen of the patient 500. A bag body 225 is provided inside the inflation section 221. An air supply tube 224 is connected to the bag body 225. The bag body 225 is inflated with air supplied from the electropneumatic regulator 264 via the air supply tube 224, causing the inflation section 221 to inflate. The inflation of the inflation section 221 compresses the abdomen of the patient 500. Furthermore, the bag body 225 contracts when air is released via the air supply tube 224, causing the inflation section 221 to contract. When the inflation section 221 contracts, the compression of the abdomen of the patient 500 is released.

[0034] The attachment parts 222 and 223 are parts for attaching the inflation part 221 to the abdomen of the patient 500. The attachment part 222 is provided at one end of the inflation part 221, and the attachment part 223 is provided at the other end of the inflation part 221. The attachment parts 222 and 223 are equipped with hook-and-loop fasteners. The air supply tube 224 is a tube for supplying air to the bag body 225 and releasing air from the bag body 225.

[0035] The compression belt 220 is wrapped around the abdomen of the patient 500, that is, the lower part of the torso of the patient 500. When the compression belt 220 is wrapped around the abdomen of the patient 500, the attachment parts 222 and 223 wrap around the back of the patient 500. The hook-and-loop fasteners on the attachment parts 222 and 223 engage with each other, thereby securing the compression belt 220 to the abdomen of the patient 500. When the compression belt 220 is secured to the abdomen of the patient 500, the inflation part 221 is positioned on the abdomen of the patient 500.

[0036] The display unit 230 displays various images in accordance with the control of the air pressure control unit 210. The display unit 230 includes a touch screen, a liquid crystal display, etc. The operation reception unit 240 receives various operations from the user and supplies information indicating the content of the received operations to the air pressure control unit 210. The operation reception unit 240 includes a touch screen, a button, a lever, etc. The communication unit 250 communicates with various devices in accordance with the control of the air pressure control unit 210. The communication unit 250 communicates with various devices in accordance with various wireless communication standards or various wired communication standards. The communication unit 250 includes a communication interface that complies with various communication standards.

[0037] The compressor 261, air tank 262, pressure reducer 263, electro-pneumatic regulator 264, exhaust valve 265, and relief valve 266 constitute a pneumatic system that inflates and deflates the compression garment 220 attached to the abdomen of the patient 500.

[0038] The compressor 261 compresses air and supplies the compressed air (hereinafter referred to as "first compressed air" as appropriate) to an air tank. The air tank 262 stores the first compressed air supplied from the compressor 261. The first compressed air stored in the air tank 262 is supplied to the pressure reducer 263. The pressure reducer 263 reduces the pressure of the first compressed air supplied from the air tank 262 to produce second compressed air. The air pressure of the second compressed air is lower than that of the first compressed air and higher than atmospheric pressure. The air pressure of the second compressed air is at a level that can be handled by the electro-pneumatic regulator 264.

[0039] The electropneumatic regulator 264 supplies the second compressed air, supplied from the pressure reducer 263, to the compression cuff 220. The electropneumatic regulator 264 also bleeds the second compressed air from the compression cuff 220. In other words, the electropneumatic regulator 264 adjusts the amount of air inside the compression cuff 220. The exhaust valve 265 is an electromagnetic valve that opens and closes under the control of the pneumatic control unit 210. When the exhaust valve 265 opens, the first compressed air inside the pneumatic system is discharged to the outside of the pneumatic system. The relief valve 266 releases the second compressed air when the pressure of the second compressed air supplied from the electropneumatic regulator 264 to the compression cuff 220 reaches or exceeds a threshold. The relief valve 266 functions as a safety valve that prevents the air pressure of the second compressed air inside the compression cuff 220 from becoming excessively high.

[0040] Air pressure sensor 267 detects the air pressure of the first compressed air. Air pressure sensor 267 supplies air pressure information indicating the air pressure of the first compressed air to air pressure control unit 210. Compression pressure sensor 268 detects the air pressure of the second compressed air. Compression pressure sensor 268 supplies compression pressure information indicating the air pressure of the second compressed air to air pressure control unit 210. The air pressure of the second compressed air is the pressure of the air inside compression cuff 220, and will be referred to as compression pressure as appropriate. Air pressure sensor 267 and compression pressure sensor 268 are, for example, semiconductor air pressure sensors.

[0041] The lower limb lifting device 300 is a device that lifts the lower limbs of a patient 500. In this embodiment, the lower limb lifting device 300 lifts the lower limbs of the patient 500 by lifting a part of a placement table 320, on which the lower limbs of the patient 500 are placed, from the floor. The lifting height, which is the height to which the lower limbs of the patient 500 are lifted, may be determined in advance or may be specified by the control device 100. For example, the control device 100 may determine the lifting height based on the degree of decrease in blood pressure of the patient 500. For example, the control device 100 may increase the lifting height as the degree of decrease in blood pressure of the patient 500 increases. As shown in FIG. 6 , the lower limb lifting device 300 includes a drive control unit 310, a placement table 320, a display unit 330, an operation receiving unit 340, a communication unit 350, a drive circuit 360, a motor 370, and an encoder 380.

[0042] The drive control unit 310 controls the overall operation of the lower limb lifting device 300. For example, when the drive control unit 310 receives a lifting instruction from the control device 100 via the communication unit 350, the drive control unit 310 controls the drive circuit 360 that drives the motor 370 to lift a part of the placement table 320 from the floor and lift the lower limbs of the patient 500. The drive control unit 310 includes a CPU, a ROM, a RAM, an RTC, etc.

[0043] The placement table 320 is a table on which the lower limbs of the patient 500 are placed. As shown in FIG. 7 , the placement table 320 includes a fixed portion 321, an inclined portion 322, and an elevation portion 323. The fixed portion 321, the inclined portion 322, and the elevation portion 323 are plate-shaped members. The placement table 320 is plate-shaped as a whole when the elevation portion 323 is not raised from the floor. The state of the placement table 320 changes when the motor 370 is driven.

[0044] The fixed part 321 is a member fixed to the floor. The state of the fixed part 321 does not change with the driving of the motor 370. In other words, the fixed part 321 remains placed on the floor even when the motor 370 is driven. The buttocks 501 of the patient 500 are placed on the fixed part 321.

[0045] Inclined portion 322 is a member that is inclined with respect to the floor surface. Inclined portion 322 rotates around rotation axis 324 relative to fixed portion 321 by driving motor 370. The inclination angle of inclined portion 322, which is the inclination with respect to the floor surface, changes by driving motor 370. Thigh 502 of patient 500 is placed on inclined portion 322.

[0046] The lifting / lowering unit 323 is a member that rises or falls when driven by the motor 370. When driven by the motor 370, the lifting / lowering unit 323 rotates around a rotation axis 325 relative to the inclined unit 322. The lifting / lowering unit 323 rises or falls while maintaining a state parallel to the floor surface. The lower leg 503 of the patient 500 is placed on the lifting / lowering unit 323. Note that in FIG. 7, the mechanism for rotating or moving the inclined unit 322 and the lifting / lowering unit 323 when driven by the motor 370 is not shown.

[0047] The display unit 330 displays various images under the control of the drive control unit 310. The display unit 330 includes a touch screen, a liquid crystal display, etc. The operation reception unit 340 receives various operations from the user and supplies information indicating the contents of the received operations to the drive control unit 310. The operation reception unit 340 includes a touch screen, a button, a lever, etc. The communication unit 350 communicates with various devices under the control of the drive control unit 310. The communication unit 350 communicates with various devices in accordance with various wireless communication standards or various wired communication standards. The communication unit 350 includes a communication interface that complies with various communication standards.

[0048] The drive circuit 360 is a circuit that drives the motor 370 in accordance with the control of the drive control unit 310. For example, the drive circuit 360 outputs a pulse signal to the motor 370 in accordance with a drive instruction from the drive control unit 310. The drive circuit 360 includes a driver IC (Integrated Circuit) for driving the motor 370.

[0049] The motor 370 is a device that converts electrical energy into mechanical energy. The motor 370 rotates in a forward or reverse direction in accordance with a pulse signal supplied from the drive circuit 360. As the motor 370 rotates, a portion of the placement table 320 rotates or moves. Specifically, as the motor 370 rotates, the inclination of the inclined portion 322 changes, causing the lifting portion 323 to rise or fall. When the motor 370 rotates in the forward direction, the inclination of the inclined portion 322 increases, causing the lifting portion 323 to rise. When the motor 370 rotates in the reverse direction, the inclination of the inclined portion 322 decreases, causing the lifting portion 323 to fall. The motor 370 is, for example, a stepping motor.

[0050] Encoder 380 is a sensor that detects changes in mechanical position and outputs an electrical signal indicating the detection result. In this embodiment, encoder 380 detects the angle that changes as motor 370 is driven, and supplies an electrical signal indicating the detected angle to drive control unit 310. Encoder 380 may detect the rotation angle of motor 370, or may detect the inclination angle of inclined portion 322 with respect to the floor surface. Encoder 380 is, for example, a rotary encoder.

[0051] The blood pressure sensor 410 detects the blood pressure of the patient 500. The blood pressure sensor 410 is, for example, a blood pressure monitor attached to the arm of the patient 500 to detect the blood pressure of the upper body of the patient 500. The blood pressure sensor 410 supplies blood pressure information indicating the blood pressure of the patient 500 to the control device 100. How the blood pressure of the patient 500 is defined can be adjusted as appropriate. For example, the blood pressure of the patient 500 may be the systolic blood pressure, the diastolic blood pressure, or the mean blood pressure. The mean blood pressure is calculated, for example, by the formula (systolic blood pressure - diastolic blood pressure) / 3 + diastolic blood pressure. In this embodiment, the blood pressure of the patient 500 indicates the systolic blood pressure.

[0052] The distance measurement sensor 420 is a sensor that measures the distance to an object. For example, as shown in FIG. 7, the distance measurement sensor 420 is installed on the lifting unit 323 and measures the distance to the floor. Alternatively, the distance measurement sensor 420 may be installed on the floor and measure the distance to the lifting unit 323. In this embodiment, the distance measurement sensor 420 measures a lift height, which is the length from the floor to the lifting unit 323. In FIG. 7, the lift height is h1. The distance measurement sensor 420 transmits height information indicating the measured lift height to the control device 100. The distance measurement sensor 420 may be a LiDAR (Light Detection and Ranging) sensor, a RADAR (Radio Detection and Ranging) sensor, or an ultrasonic sensor.

[0053] LiDAR sensors are sensors that determine the distance to an object using the phase difference of light, typically infrared light. LiDAR sensors calculate the distance to an object from the difference between the phase of the output optical signal and the phase of the reflected optical signal. RADAR sensors are sensors that determine the distance to an object using the propagation time of radio waves. RADAR sensors calculate the distance to an object from the time between transmitting and receiving radio waves. Ultrasonic sensors are sensors that determine the distance to an object using the propagation time of ultrasonic waves. Ultrasonic sensors calculate the distance to an object from the time between transmitting and receiving ultrasonic waves.

[0054] Next, the functions of the abdominal compression system 1000 will be described with reference to Fig. 8. Below, the functions of the control device 100 provided in the abdominal compression system 1000 will be mainly described. Functionally, the control device 100 includes a blood pressure decrease detection unit 101, an elevation control unit 102, an elevation detection unit 103, and a compression control unit 104. Each of these functions is realized by software, firmware, or a combination of software and firmware. The software and firmware are written as programs and stored in the ROM or storage unit 12. Then, the CPU executes the programs stored in the ROM or storage unit 12 to realize each of these functions.

[0055] The blood pressure drop detection unit 101 detects a drop in blood pressure of the patient 500 while the patient 500 is undergoing dialysis. For example, the blood pressure drop detection unit 101 determines whether the blood pressure indicated by the blood pressure information acquired from the blood pressure sensor 410 is equal to or lower than a blood pressure threshold. In this embodiment, the blood pressure used to determine whether the patient 500 has dropped in blood pressure is the systolic blood pressure of the patient 500. Therefore, the blood pressure drop detection unit 101 determines that a drop in blood pressure has occurred when the systolic blood pressure is equal to or lower than the blood pressure threshold, and determines that a drop in blood pressure has not occurred when the systolic blood pressure exceeds the blood pressure threshold. The value of the blood pressure threshold can be adjusted as appropriate. For example, the blood pressure threshold may be set to 90% of the patient 500's normal systolic blood pressure. The blood pressure drop detection unit 101 is an example of a blood pressure drop detection means.

[0056] When the blood pressure drop detection unit 101 detects a drop in blood pressure of the patient 500, the lift control unit 102 controls the lower limb lifting device 300 to lift the lower limbs of the patient 500. For example, when the lift control unit 102 detects a drop in blood pressure, it transmits lift instruction information to the lower limb lifting device 300 to instruct the device to lift the lower limbs of the patient 500. Upon receiving the lift instruction information from the lift control unit 102, the lower limb lifting device 300 lifts the lower limbs of the patient 500. The lift control unit 102 is an example of a lift control means. The lower limb lifting device 300 is an example of a lower limb lifting means.

[0057] The elevation detection unit 103 detects elevation of the lower limbs of the patient 500 during dialysis of the patient 500. The method by which the elevation detection unit 103 detects elevation of the lower limbs of the patient 500 can be adjusted as appropriate. For example, the elevation detection unit 103 may determine whether the lower limbs of the patient 500 are elevated based on the elevation height indicated by the height information acquired from the distance measurement sensor 420. For example, the elevation detection unit 103 may determine that the lower limbs of the patient 500 are elevated if the elevation height is equal to or greater than a height threshold, and may determine that the lower limbs of the patient 500 are not elevated if the elevation height is less than the height threshold. The height threshold can be adjusted as appropriate. For example, the height threshold may be 10 cm.

[0058] Alternatively, the lift detection unit 103 may determine whether the lower limbs of the patient 500 are lifted or not based on the lift state indicated by the lift state information acquired from the lift control unit 102. For example, the lift detection unit 103 may determine that the lower limbs of the patient 500 are lifted when the lift state is a raised state, and may determine that the lower limbs of the patient 500 are not lifted when the lift state is a lowered state. Note that the lift control unit 102 outputs lift state information indicating the raised state when the lower limbs of the patient 500 are lifted, and outputs lift state information indicating the lowered state when the lower limbs of the patient 500 are not lifted. The lift detection unit 103 is an example of a lift detection means.

[0059] When the lift detection unit 103 detects that the lower limbs of the patient 500 are lifted, the compression control unit 104 controls the abdominal compression device 200 to repeatedly compress the abdomen of the patient 500. For example, when the lift detection unit 103 detects that the lower limbs of the patient 500 are lifted, the compression control unit 104 transmits compression start instruction information to the abdominal compression device 200 to instruct the abdominal compression device 200 to start compressing the abdomen of the patient 500. Upon receiving the compression start instruction information from the compression control unit 104, the abdominal compression device 200 repeatedly compresses the abdomen of the patient 500. The compression control unit 104 is an example of a compression control means. The abdominal compression device 200 is an example of an abdominal compression means.

[0060] The lift detection unit 103 may detect a lift height, which is the height to which the lower limbs of the patient 500 are lifted, and detect the lifting of the lower limbs of the patient 500 based on the lift height. For example, the lift detection unit 103 may identify the lift height based on height information acquired from the distance measurement sensor 420, and determine that the lower limbs of the patient 500 are lifted if the lift height exceeds a height threshold. The distance measurement sensor 420 measures the lift height and supplies height information indicating the measured lift height to the lift detection unit 103. Meanwhile, the lift detection unit 103 acquires height information from the distance measurement sensor 420 and acquires the lift height measured by the distance measurement sensor 420, as described above. The distance measurement sensor 420 is an example of a height measurement means.

[0061] Here, the compression control unit 104 may compress the abdomen of the patient 500 with a compression force according to the elevation height detected by the elevation detection unit 103. Specifically, the higher the elevation height, the stronger the compression force the compression control unit 104 increases. Note that the strength of the compression force corresponds to the compression pressure, which is the pressure of the air inside the compression cuff 220. Therefore, the higher the elevation height, the higher the compression pressure the compression control unit 104 increases. For example, the compression control unit 104 may increase the compression force in proportion to the elevation height. For example, p = k × h may be used, where h is the elevation height, p is the compression pressure, and k is a coefficient.

[0062] Alternatively, the compression control unit 104 may set the compression force in stages. For example, the height threshold described above is assumed to be a first height threshold, and a second height threshold greater than the first height threshold and a third height threshold greater than the second height threshold are assumed. First, when the detected elevation height is equal to or greater than the first height threshold and less than the second height threshold, the compression force for compressing the abdomen of the patient 500 is set to the first compression force. Then, when the detected elevation height is equal to or greater than the second height threshold and less than the third height threshold, the compression force is set to the second compression force, which is stronger than the first compression force. Furthermore, when the detected elevation height is equal to or greater than the third height threshold, the compression force is set to the third compression force, which is stronger than the second compression force.

[0063] Next, the abdominal compression process executed by the control device 100 will be described with reference to the flowchart of Fig. 9. The abdominal compression process is executed, for example, when artificial dialysis of the patient 500 is started and the control device 100 receives a start instruction from the user.

[0064] First, the control unit 11 included in the control device 100 acquires blood pressure information (step S101). For example, the control unit 11 acquires the blood pressure information from the blood pressure sensor 410 via the communication unit 15. After completing the process of step S101, the control unit 11 determines whether the blood pressure of the patient 500 is equal to or lower than the blood pressure threshold (step S102). For example, the control unit 11 determines whether the systolic blood pressure indicated by the acquired blood pressure information is equal to or lower than the blood pressure threshold. Information indicating the blood pressure threshold is stored in, for example, the storage unit 12.

[0065] If the control unit 11 determines that the blood pressure of the patient 500 is not equal to or lower than the blood pressure threshold (step S102: NO), the control unit 11 returns the process to step S101. If the control unit 11 determines that the blood pressure of the patient 500 is equal to or lower than the blood pressure threshold (step S102: YES), the control unit 11 instructs the patient 500 to lift the lower limbs (step S103). For example, the control unit 11 transmits lift instruction information instructing the patient 500 to lift the lower limbs to the lower limb lift device 300 via the communication unit 15. Upon receiving the lift instruction information, the lower limb lift device 300 lifts the lower limbs of the patient 500.

[0066] Upon completing the process of step S103, the control unit 11 acquires height information (step S104). For example, the control unit 11 acquires the height information from the distance measurement sensor 420 via the communication unit 15. Upon completing the process of step S104, the control unit 11 determines whether the lift height is equal to or greater than a height threshold (step S105). For example, the control unit 11 determines whether the lift height indicated by the acquired height information is equal to or greater than a height threshold. Information indicating the height threshold is stored in the storage unit 12, for example.

[0067] When the control unit 11 determines that the lifting height is not equal to or greater than the height threshold (step S105: NO), it determines whether a certain time has elapsed since the lifting instruction was issued (step S106). This certain time is, for example, a time slightly longer than the time required for the lower limb lifting device 300 to complete lifting of the lower limbs of the patient 500 after receiving the lifting instruction. Information indicating this certain time is stored, for example, in the storage unit 12.

[0068] If the control unit 11 determines that a certain time has not elapsed since the lifting instruction was issued (step S106: NO), it returns the process to step S104. If the control unit 11 determines that a certain time has elapsed since the lifting instruction was issued (step S106: YES), it displays an error message (step S107). For example, the control unit 11 controls the display unit 13 to display an error message notifying that the lower limbs of the patient 500 are not being lifted normally. When the control unit 11 completes the process of step S107, it ends the abdominal compression process.

[0069] When the control unit 11 determines that the elevation height is equal to or greater than the height threshold (step S105: YES), it determines a compression force according to the elevation height (step S108). For example, the control unit 11 determines the compression pressure by multiplying the elevation height by a predetermined coefficient. When the control unit 11 completes the processing of step S108, it instructs the abdominal compression device 200 to compress the abdomen of the patient 500 with the determined compression force (step S109). For example, the control unit 11 transmits compression start instruction information to the abdominal compression device 200 via the communication unit 15, instructing the start of processing to repeatedly compress the abdomen of the patient 500 with the determined compression pressure. When the abdominal compression device 200 receives this compression start instruction information, it repeatedly compresses the abdomen of the patient 500 with the compression pressure specified in the compression instruction information.

[0070] Upon completing the process of step S109, the control unit 11 acquires blood pressure information (step S110). Upon completing the process of step S110, the control unit 11 determines whether the blood pressure of the patient 500 is equal to or lower than the blood pressure threshold (step S111). If the control unit 11 determines that the blood pressure of the patient 500 is equal to or lower than the blood pressure threshold (step S111: YES), the control unit 11 returns the process to step S110.

[0071] When the control unit 11 determines that the blood pressure of the patient 500 is not equal to or lower than the blood pressure threshold (step S111: NO), it instructs the end of compression of the abdomen of the patient 500 (step S112). For example, the control unit 11 transmits compression end instruction information instructing the end of compression of the abdomen of the patient 500 to the abdominal compression device 200 via the communication unit 15. When the abdominal compression device 200 receives this compression end instruction information, it ends compression of the abdomen of the patient 500.

[0072] Upon completing the process of step S112, the control unit 11 instructs the end of lifting the lower limbs of the patient 500 (step S113). For example, the control unit 11 transmits lift end instruction information, which instructs the end of lifting the lower limbs of the patient 500, to the lower limb lift device 300 via the communication unit 15. Upon receiving this lift end instruction information, the lower limb lift device 300 ends the lifting of the lower limbs of the patient 500. Upon completing the process of step S113, the control unit 11 returns the process to step S101.

[0073] In this embodiment, if elevation of the lower limbs of the patient 500 is detected during dialysis of the patient 500, the abdomen of the patient 500 is repeatedly compressed. For example, if a nurse who has confirmed a drop in the blood pressure of the patient 500 raises the lower limbs of the patient 500, a process of repeatedly compressing the abdomen of the patient 500 is executed. Therefore, according to this embodiment, a drop in the blood pressure of the patient 500 during dialysis can be suppressed.

[0074] Furthermore, in this embodiment, the abdomen of the patient 500 is compressed with a pressure corresponding to the elevation height, which is the height to which the lower limbs of the patient 500 are elevated. Here, the higher the elevation height, the more likely blood is to pool in the inferior vena cava. Therefore, the higher the elevation height, the stronger the abdominal compression required, but it can be expected that the blood pressure of the patient 500 will increase more. Therefore, according to this embodiment, it is possible to more appropriately suppress a drop in the blood pressure of the patient 500 during dialysis.

[0075] Furthermore, in this embodiment, the lift detection unit 103 acquires the lift height measured by the distance measurement sensor 420. Therefore, according to this embodiment, it is possible to accurately identify the lift height used to determine the compression force.

[0076] Furthermore, in this embodiment, when the blood pressure decrease detection unit 101 detects a decrease in blood pressure of the patient 500, the lower limbs of the patient 500 are raised. Therefore, according to this embodiment, it is possible to reduce the effort required of the user to suppress a decrease in blood pressure of the patient 500.

[0077] (Embodiment 2) In the first embodiment, an example in which the lift height is detected using the distance measurement sensor 420 has been described. The method for detecting the lift height is not limited to this method. In the present embodiment, a method for detecting the lift height from the lift angle will be described. Note that the description of the same configurations and functions as those in the first embodiment will be omitted or simplified as appropriate.

[0078] The function of an abdominal compression system 1100 according to this embodiment will be described with reference to Fig. 10. The abdominal compression system 1100 has the same configuration as the abdominal compression system 1000, except that it does not include a distance measurement sensor 420 and includes a control device 110 instead of the control device 100. The control device 110 has the same configuration as the control device 100, except for the operation of the lift detection unit 103.

[0079] Encoder 380 measures the elevation angle, which is the angle between the extension direction of thigh 502 of patient 500 and the horizontal plane. For example, as shown in Fig. 11 , encoder 380 is provided at the connection portion between fixed portion 321 and inclined portion 322, and measures the inclination angle, which is the angle at which inclined portion 322 is inclined with respect to fixed portion 321. That is, in this embodiment, encoder 380 measures the inclination angle of inclined portion 322, rather than the rotation angle of motor 370.

[0080] Here, the fixed portion 321 extends along a horizontal plane, and the direction in which the inclined portion 322 extends is substantially the same as the direction in which the thigh 502 of the patient 500 extends. Therefore, the inclination angle of the inclined portion 322 is essentially the elevation angle. The encoder 380 supplies angle information indicating the measured elevation angle to the control device 110. The encoder 380 is an example of an angle measuring means.

[0081] The elevation detection unit 103 acquires the elevation angle from the encoder 380 and calculates the elevation height based on the elevation angle and the length of the thigh 502 of the patient 500. For example, assume that the elevation angle is θ1, the elevation height is h1, and the length of the thigh 502 is L1. In this case, h1 can be calculated using the formula h1=L1×sinθ1. Note that information indicating the length of the thigh 502 is stored, for example, in the storage unit 12. Furthermore, the length of the thigh 502 may be considered to be approximately the same as the length of the inclined portion 322. In this case, it is sufficient that information indicating the length of the inclined portion 322 is stored in the storage unit 12.

[0082] In this embodiment, the lift height is calculated from the lift angle. Therefore, according to this embodiment, distance measuring sensor 420 that measures the lift height is not required. For example, if lower limb lifting device 300 is equipped with encoder 380 that measures the lift angle, it is possible to calculate the lift height without providing distance measuring sensor 420 that measures the lift height.

[0083] (Variation) Although the embodiments have been described above, modifications and applications in various forms are possible. It is up to the discretion of the individual to adopt any of the configurations, functions, and operations described in the above embodiments. Furthermore, in addition to the above-described configurations, functions, and operations, additional configurations, functions, and operations may be adopted. Furthermore, the configurations, functions, and operations described in the above embodiments can be freely combined.

[0084] In the first embodiment, an example has been described in which the control device 100 having a control function for controlling the operation of the entire system, the abdominal compression device 200 having an abdominal compression function for compressing the abdomen of the patient 500, and the lower limb lifting device 300 having a lower limb lifting function for lifting the lower limbs of the patient 500 work together. The system configuration is not limited to the configuration shown in the first embodiment as long as the entire system has the control function, the abdominal compression function, and the lower limb lifting function. For example, if the abdominal compression device 200 has the control function in addition to the abdominal compression function, the control device 100 is not required. Also, if the lower limb lifting device 300 has the control function in addition to the lower limb lifting function, the control device 100 is not required. Also, a single device having the control function, the abdominal compression function, and the lower limb lifting function may be employed.

[0085] In the first embodiment, an example has been described in which the lower limb lifting device 300 lifts the lower limbs of the patient 500. The lifting of the lower limbs of the patient 500 may be achieved manually. For example, when a nurse detects a drop in the blood pressure of the patient 500, the nurse may manually lift the lower limbs of the patient 500. In this case, when the lifting of the lower limbs of the patient 500 is detected, the abdomen of the patient 500 may be compressed.

[0086] In the first embodiment, an example has been described in which the lifting height of the lower limb lifting device 300 is constant regardless of the degree of decrease in blood pressure of the patient 500. The lifting height of the lower limb lifting device 300 may be adjusted according to the degree of decrease in blood pressure of the patient 500. For example, the greater the degree of decrease in blood pressure of the patient 500, the higher the lifting height of the lower limb lifting device 300 may be adjusted.

[0087] In the first embodiment, an example has been described in which the pressure applied to the abdomen of the patient 500 is adjusted depending on the elevation height. When elevation of the lower limbs of the patient 500 is detected, the abdomen of the patient 500 may be compressed with a constant pressure regardless of the elevation height.

[0088] In the first embodiment, an example has been described in which the lower leg 503 of the patient 500 is maintained horizontal when the lower leg of the patient 500 is lifted, and the distance from the floor to the lower leg 503 is set as the lifting height. How the lifting height is set can be adjusted as appropriate. For example, the lower leg of the patient 500 may be maintained in a straight state when the lower leg of the patient 500 is lifted, and the lifting height may be set to the distance from the floor to the knee of the patient 500, the distance from the floor to the toe of the patient 500, the distance from the floor to the center of the lower leg 503 of the patient 500, or the like.

[0089] In the first embodiment, an example has been described in which the abdomen of the patient 500 is compressed by supplying air to expand the expansion section 221. The method of compressing the abdomen of the patient 500 is not limited to this example. For example, the abdomen of the patient 500 may be compressed by supplying a gas other than air or a liquid to expand the expansion section 221. Furthermore, the abdomen of the patient 500 may be compressed by tightening using an elastic body such as a spring or rubber.

[0090] In the above embodiment, the control unit 11 functions as each of the units shown in FIGS. 8 and 10 by the CPU executing a program stored in the ROM or the storage unit 12. However, in the present disclosure, the control unit 11 may be dedicated hardware. Dedicated hardware may be, for example, a single circuit, a composite circuit, a programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof. When the control unit 11 is dedicated hardware, the functions of each unit may be realized by individual hardware, or the functions of each unit may be realized collectively by a single piece of hardware. Furthermore, some of the functions of each unit may be realized by dedicated hardware, and the other functions may be realized by software or firmware. In this way, the control unit 11 can realize each of the above-described functions by hardware, software, firmware, or a combination thereof.

[0091] By applying an operation program that defines the operation of the control device 100, 110 according to the present disclosure to a computer such as an existing personal computer or information terminal device, it is also possible to cause the computer to function as the control device 100, 110 according to the present disclosure. In addition, the method of distributing such a program is arbitrary, and for example, the program may be distributed by being stored on a computer-readable recording medium such as a CD-ROM (Compact Disk ROM), a DVD (Digital Versatile Disk), an MO (Magneto Optical Disk), or a memory card, or may be distributed via a communication network such as the Internet.

[0092] The present disclosure allows various embodiments and modifications without departing from the broad spirit and scope of the present disclosure. Furthermore, the above-described embodiments are intended to explain the present disclosure and do not limit the scope of the present disclosure. That is, the scope of the present disclosure is defined by the claims, not the embodiments. Various modifications made within the scope of the claims and the meaning of equivalent disclosures are considered to be within the scope of the present disclosure. [Explanation of symbols]

[0093] 11 control unit, 12 memory unit, 13,230,330 display unit, 14,240,340 operation reception unit, 15,250,350 communication unit, 100,110 control device, 101 blood pressure drop detection unit, 102 lift control unit, 103 lift detection unit, 104 compression control unit, 200 abdominal compression device, 210 air pressure control unit, 220 compression cuff, 221 inflation unit, 222,223 mounting unit, 224 air supply tube, 225 bag body, 261 compressor, 262 air tank, 263 pressure reducer, 264 electro-pneumatic regulator, 265 exhaust valve, 266 relief valve, 267 air pressure sensor, 268 compression pressure sensor, 300 lower limb lift device, 310 drive control unit, 320 placement stand, 321 Fixed part, 322 tilt part, 323 lift part, 324, 325 rotating shaft, 360 drive circuit, 370 motor, 380 encoder, 410 blood pressure sensor, 420 distance measurement sensor, 500 patient, 501 buttocks, 502 thigh, 503 lower leg, 1000, 1100 abdominal compression system

Claims

1. an abdominal compression means for compressing the patient's abdomen; an elevation detection means for detecting elevation of the patient's lower limbs during dialysis; and a compression control means for controlling the abdominal compression means to repeatedly compress the abdomen of the patient when the lift detection means detects that the patient's lower limbs are being lifted. Abdominal compression system.

2. The lift detection means detects a lift height, which is a height to which the patient's lower limbs are lifted, The compression control means compresses the abdomen of the patient with a compression force corresponding to the elevation height detected by the elevation detection means. The abdominal compression system of claim 1 .

3. Further provided is a height measuring means for measuring the lift height, The lift detection means acquires the lift height measured by the height measurement means. The abdominal compression system of claim 2 .

4. An angle measuring means is further provided for measuring an elevation angle, which is an angle formed between a direction in which the patient's thigh extends and a horizontal plane, The elevation detection means acquires the elevation angle from the angle measurement means, and calculates the elevation height based on the elevation angle and the length of the patient's thigh. The abdominal compression system of claim 2 .

5. a lower limb lifting means for lifting the lower limbs of the patient; a blood pressure drop detection means for detecting a drop in blood pressure of the patient during artificial dialysis of the patient; and an elevation control means for controlling the lower limb elevation means to elevate the lower limbs of the patient when the blood pressure decrease detection means detects a decrease in blood pressure of the patient. An abdominal compression system according to any one of claims 1 to 4.

6. A step in which an elevation detection means in a control device that controls an abdominal compression device that compresses the abdomen of a patient detects elevation of the patient's lower limbs during artificial dialysis of the patient; a step in which the compression control means in the control device transmits control information to the abdominal compression device when the lift detection means detects that the patient's lower limbs are lifted, the control information instructing the abdominal compression device to repeatedly compress the patient's abdomen; Control method.

7. Computer, an elevation detection means for detecting elevation of the patient's lower limbs during dialysis; When the lift detection means detects that the lower limbs of the patient are lifted, the lift detection means functions as a compression control means for repeatedly compressing the abdomen of the patient by controlling an abdominal compression means for compressing the abdomen of the patient. program.

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