JP6775280B2 - Compression system - Google Patents

Description

The present invention also relates to a pressure system.

As the compression system, for example, Patent Document 1 describes a blood pressure-related device for non-invasively controlling a blood pressure of a living body, which periodically detects a blood pressure-related value related to the blood pressure value of the living body. The value detection device, the biological compression device attached to the part of the living body to compress the part of the living body, and the blood pressure-related value detected by the blood pressure-related value detecting device are the target value or the target range. Disclosed is a blood pressure control device including a compression state control device that automatically changes the compression state of the biological compression device based on the blood pressure-related value.

Japanese Unexamined Patent Publication No. 2005-348903

In the blood pressure control device (compression system) described in Patent Document 1, it is difficult to compress a part (target site) of the living body with an appropriate force only by feeding back the blood pressure value (for example, as described later). In addition, it is difficult to apply pressure that does not interfere with abdominal breathing.) Further, the biological compression device (compression device) in Patent Document 1 is a general pants type, and has an inconvenience that the living body is difficult to move when worn.

An object of the present invention and other inventions is to provide a compression system capable of suitably compressing a target portion of the lower body of a living body . Another object of the present invention is to provide a compression device in which a living body can easily move even when worn.

The compression system according to the present invention is
A compression wearing body that is attached to a target part of the lower body including at least the abdomen of the living body and presses the target part is provided, and the target part is pressed by the compression wearing body to suppress a decrease in blood pressure of the upper body of the living body. With a compression device
A control unit that controls the compression force by which the compression device presses the target portion by adjusting the amount of air inside the compression mounting body is provided.
The control unit acquires the pressure of the breath exhaled by the living body as a physical quantity that changes according to the volume change of the target part in a cycle sufficiently shorter than the respiratory cycle of the living body, and the acquired physical quantity is the target part. wherein reducing the amount of air when the change in the direction in which the volume is increased, and / or, the increasing amount of air when the physical amount acquired is changed in the direction in which the volume is reduced to the target site.

The compression system further includes a first feedback mechanism that feeds back the brain oxygen concentration of the living body to the control unit.
The control unit
A target value of the compression force is set based on the brain oxygen concentration fed back by the first feedback mechanism.
The compression force is brought closer to the target value according to the acquired change in the physical quantity.
You may do so.
The compression system further includes a second feedback mechanism that feeds back the blood pressure of the living body to the control unit.
The control unit sets a target value of the compression force based on the blood pressure and the brain oxygen concentration fed back by the second feedback mechanism.
You may do so .
Before SL pressing attachment member is formed in a shape the covering in or elastic member to expose a joint site of sites when attached to the target site,
You may do so.

The compression system according to the first aspect of the other invention
A compression device that compresses the target part, which is a part of the living body,
The compression device includes a control unit that controls a compression force that presses the target portion.
The control unit controls to change the compression force according to the volume change of the target portion.
It is characterized by that.
The control unit may reduce the compression force when the volume of the target portion increases, and / or increase the compression force when the volume of the target portion decreases.
In addition, the compression system further includes a first feedback mechanism that feeds back the brain oxygen concentration of the living body to the control unit.
The control unit sets a target value of the compression force based on the brain oxygen concentration fed back by the first feedback mechanism, and changes the compression force according to a volume change of the target site to change the compression force. To approach the target value,
You may do so.
In addition, the compression system further includes a second feedback mechanism that feeds back the blood pressure of the living body to the control unit.
The control unit sets a target value of the compression force based on the blood pressure and the brain oxygen concentration fed back by the second feedback mechanism.
You may do so.

The compression system according to the second aspect of the other invention
A compression device that compresses the target part, which is a part of the living body,
A control unit that controls the compression force with which the compression device presses the target portion,
It is provided with a feedback mechanism that feeds back the brain oxygen concentration of the living body to the control unit.
The control unit controls the compression force so that the brain oxygen concentration fed back by the feedback mechanism falls within a target value or a target range.
It is characterized by that.

The compression device according to the third aspect of the other invention is
It is equipped with a compression attachment body that is attached to a target part that is a part of the living body and presses the target part.
The compression wearing body is composed of a plurality of wearing bodies separated by a joint part of the target part, or is formed in a shape that exposes the joint part or is covered with an elastic member when it is worn on the target part. Yes,
It is characterized by that.

According to the compression system of the first and second aspects of the compression system and other invention according to the present invention can suitably compress the target site of the lower body of a living body. Further, according to the compression device according to the third aspect of the other invention, the living body is easy to move even if the compression device is attached.

It is a figure which shows the whole structure of the compression system which concerns on one Embodiment of this invention. It is a figure which shows the block structure of the pressure control circuit which concerns on one Embodiment of this invention. It is a figure which shows the relationship graph of the ideal pants pressure, the actual pants pressure and the like. It is a figure which shows the relationship graph of the pants pressure, the blood pressure, the cerebral oxygen saturation and the like. It is a figure which shows the relationship graph of the pants pressure, the blood pressure, the cerebral oxygen saturation and the like. It is a figure of the 1st mounting part. It is a figure of the 2nd mounting part. It is a figure which shows the state when the compression pants are attached to a human body.

The compression system 1 according to an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the compression system 1 includes compression pants 20, a compressor 21, an air tank 22, a decompressor 23, an electropneumatic regulator 24, an exhaust valve 25, and a relief valve 26.

The compressor 21, the air tank 22, the decompressor 23, the electropneumatic regulator 24, the exhaust valve 25, and the relief valve 26 are empty to inflate or contract the compression pants 20 attached to the patient X. Configure the pressure system.

The compression pants 20 are worn on the lower body of the patient X suffering from orthostatic hypotension or the like, and press the lower body of the patient X. Specifically, when the patient X gets up (when the blood pressure or the like drops), the lower body of the patient X is pressed. This compression causes the blood in the lower body of patient X to be squeezed out to the upper body, and suppresses the decrease in blood pressure and cerebral oxygen concentration (also referred to as cerebral oxygen saturation) in the upper body when patient X wakes up from a sleeping state. To do. This prevents fainting due to a decrease in blood pressure and cerebral oxygen concentration.

The compression pants 20 are formed of chemical fibers or the like and are divided into three parts (detailed structure will be described later). One of the three parts is the first mounting part 20A mounted on the abdomen, the other is the second mounting part 20B mounted on the left foot, and the last one is on the right foot. This is the third mounting portion 20C to be mounted.

Each of the first mounting portion 20A to the third mounting portion 20C has a bag shape, and expands when air is supplied to the inside. The amount of air in the first mounting portion 20A to the third mounting portion 20C is adjusted by the electropneumatic regulator 24. The expansion of the first mounting portion 20A compresses the abdomen of patient X. The expansion of the second mounting portion 20B compresses the left foot of patient X. The expansion of the third mounting portion 20C compresses the right foot of patient X. Due to such compression, the lower body of patient X is compressed.

The compressor 21 compresses air (atmosphere) and supplies the compressed air (hereinafter, referred to as first compressed air) to the air tank 22.

The air tank 22 is a tank that stores the first compressed air supplied from the compressor 21. The air tank 22 can store the energy of the compressed air generated by the compressor 21. The first compressed air stored in the air tank 22 is supplied to the decompressor 23.

The decompressor 23 decompresses the air pressure of the first compressed air supplied from the air tank 22 to the air pressure that can be used by the electropneumatic regulator 24. The air decompressed by the decompressor 23 is air having a pressure higher than the atmospheric pressure, and is therefore compressed more than the atmosphere. The air decompressed by the decompressor 23 (hereinafter referred to as the second compressed air). It is supplied to the electropneumatic regulator 24.

The electropneumatic regulator 24 supplies the second compressed air supplied from the decompressor 23 to the compression pants 20, and removes the second compressed air supplied to the compression pants 20 from the compression pants 20. That is, the electropneumatic regulator 24 adjusts the amount of air in the compression pants 20 (first mounting portion 20A to third mounting portion 20C). When the second compressed air is removed from the compression pants 20, the electropneumatic regulator 24 may exhaust the second compressed air to the outside of the compression system 1. The electropneumatic regulator 24 is controlled by the controller 70.

The exhaust valve 25 is an electromagnetic valve that opens and closes under the control of the controller 70. When the exhaust valve 25 is opened, the first compressed air in the pneumatic system is exhausted to the outside of the pneumatic system. A silencer may be attached to the exhaust valve 25, whereby the exhaust noise may be reduced.

The relief valve 26 is arranged in the vicinity of the electropneumatic regulator 24, and releases the second compressed air when the atmospheric pressure of the second compressed air supplied from the electropneumatic regulator 24 to the compression pants 20 becomes equal to or higher than a predetermined atmospheric pressure. .. In this way, the relief valve 26 functions as a safety valve that prevents the pressure of the second compressed air in the compression pants 20 from becoming excessively large.

The compression system 1 further includes a pressure sensor 31, a pants pressure sensor 33, a blood pressure sensor 41, a brain oxygen concentration sensor 43, an emergency stop switch 52, an operation unit 54, a display unit 56, a controller 70, and the like. To be equipped with. These constitute a control system that controls the pneumatic system.

The barometric pressure sensor 31 is a semiconductor pressure sensor or the like. The air pressure sensor 31 is arranged between the air tank 22 and the decompressor 23, and detects the air pressure of the first compressed air supplied from the air tank 22 to the decompressor 23. The atmospheric pressure sensor 31 supplies an electric signal (hereinafter, referred to as an atmospheric pressure signal) indicating the atmospheric pressure of the detected first compressed air to the controller 70.

The pants pressure sensor 33 is a semiconductor pressure (atmospheric pressure) sensor or the like. The pants pressure sensor 33 is provided at a position near the first mounting portion 20A on the supply path for supplying the second compressed air to the first mounting portion 20A, and is the atmospheric pressure of the second compressed air, that is, the internal pressure of the first mounting portion 20A. (Hereinafter referred to as pants pressure) is detected. The pants pressure sensor 33 supplies the detected electric signal (hereinafter, referred to as a pants pressure signal) indicating the internal pressure to the controller 70.

The blood pressure sensor 41 is attached to the arm of patient X and includes a sphygmomanometer or the like that detects the blood pressure of the upper body of patient X. The blood pressure sensor 41 calculates an average blood pressure based on the detected blood pressure, and supplies an electric signal (hereinafter, referred to as a blood pressure signal) indicating the calculated average blood pressure to the controller 70. The average blood pressure is, for example, a value calculated by ((systolic blood pressure value + diastolic blood pressure value) ÷ 3) + lower blood pressure value.

The cerebral oxygen concentration sensor 43 is a sensor attached to the head (forehead, etc.) of the patient X and detects the cerebral oxygen concentration (the concentration of oxygen supplied to the brain by the bloodstream), which is the concentration of the cerebral oxygen of the patient X. is there. The cerebral oxygen concentration sensor 43 supplies an electric signal (hereinafter, referred to as a cerebral oxygen concentration signal) indicating the detected cerebral oxygen concentration to the controller 70.

The emergency stop switch 52 is composed of a push button or the like, and supplies a signal (hereinafter, referred to as an emergency stop signal) indicating that the emergency stop switch 52 has been operated to the controller 70.

The operation unit 54 inputs a target value of the blood pressure of the patient X when the lower body of the patient X is pressed by the compression pants 20, and includes a dial-type operation input device and the like. The operation unit 54 is a target value (hereinafter referred to as a target blood pressure) operated and input by a user (patient X himself or another person such as a doctor or a nurse) who operates the compression system 1. (Hereinafter referred to as a target blood pressure signal) is supplied to the controller 70. In this embodiment, the target blood pressure is set as the target value of the average blood pressure when the patient X gets up (such as when standing up). The target blood pressure may be one predicted by a doctor or the like.

The display unit 56 includes a liquid crystal display device or the like, and under the control of the controller 70, for example, displays the target blood pressure input by the operation unit 54.

The controller 70 is composed of various processors that execute processing according to a program such as a microcomputer, and various circuits such as logic circuits that do not use a program. The controller 70 controls the operation of the compression system 1. The controller 70 may be a digital circuit or an analog circuit. Further, the controller 70 may be a partial analog circuit and a partial digital circuit.

The controller 70 monitors the atmospheric pressure indicated by the atmospheric pressure signal from the atmospheric pressure sensor 31, and when the value of the atmospheric pressure exceeds a predetermined threshold value (the value of the atmospheric pressure that causes the determination to be abnormally high pressure), the exhaust valve Open 25. With such control, when the air pressure of the first compressed air in the pneumatic system of FIG. 1 becomes abnormally high, the first compressed air in the pneumatic system can be discharged. As a result, the air pressure in the pneumatic system can be lowered, and the safety of the compression system 1 can be ensured.

Further, when the emergency stop signal is supplied from the emergency stop switch 52 (for example, the controller 70 is pressed when the patient X has an abnormality), the controller 70 opens the exhaust valve 25 and the electropneumatic regulator 24. Is controlled to discharge the second compressed air in the compression pants 20. By such an operation, the safety of the compression system 1 can be ensured.

Further, the controller 70 adjusts the amount of the second compressed air in the compression pants 20 by controlling the electropneumatic regulator 24 by the control signal, and presses the lower body of the patient X (hereinafter, referred to as a compression force). To control. The control of the electropneumatic regulator 24 is performed by the pressure control circuit 70A (see FIG. 2) included in the controller 70.

The pressure control circuit 70A is configured to have, for example, a block configuration as shown in FIG. For example, when the controller 70 is realized by a processor such as a microcomputer, a program that realizes the block diagram as shown in FIG. 2 may be prepared.

The pressure control circuit 70A includes a moving average filter 701, an addition point 703, and a PID (Proportional-Integral-Derivative) controller 705.

A blood pressure signal from the blood pressure sensor 41 is supplied to the moving average filter 701. The moving average filter 701 samples the average blood pressure value indicated by the blood pressure signal every 0.01 seconds, and obtains a moving average for 200 samples (average blood pressure data for 2 seconds). The moving average filter 701 adds the obtained moving average (hereinafter referred to as a moving average blood pressure) and supplies it to the summing point 703. The average blood pressure may be calculated on the moving average filter 701 side. Specifically, the blood pressure sensor 41 outputs an electric signal indicating blood pressure, and the moving average filter 701 samples the blood pressure value based on the electric signal (for example, sampling every 0.01 seconds). , The moving average blood pressure may be calculated from the blood pressure value of a predetermined number of samplings (200 samples).

The addition point 703 is composed of a subtractor or the like, and a target blood pressure is also supplied. It is assumed that the target blood pressure is input by the operation unit 54, held in the memory of the controller 70, and supplied to the addition point 703. In addition, at the summation point 703, the value of the moving average blood pressure is subtracted from the value of the target blood pressure. The reduced value is supplied to the PID controller 705 as a blood pressure deviation.

The PID controller 705 performs PID control based on the blood pressure deviation supplied from the addition point 703 and outputs a new target pants pressure. The parameters of the transfer function of the PID control performed by the PID controller 705 may be obtained and set in advance by simulation or the like (the same applies to other PID controllers). The target pants pressure increases when the blood pressure indicated by the blood pressure signal (that is, the value of the blood pressure of patient X) is lower than the target blood pressure, and decreases when the blood pressure indicated by the blood pressure signal is higher than the target blood pressure value. With such a relationship, the force with which the compression pants 20 press the lower body of the patient X can be appropriately controlled. The target pants pressure is supplied from the PID controller 705 to the addition point 715.

Further, the pressure control circuit 70A includes a moving average filter 707, an addition point 709, and a PID controller 711.

The moving average filter 707 is supplied with a brain oxygen concentration signal from the brain oxygen concentration sensor 43. The moving average filter 707 samples the value of the brain oxygen concentration indicated by the brain oxygen concentration signal every 0.01 seconds, and obtains the moving average for 20 samples (data of the brain oxygen concentration for 0.2 seconds). The moving average filter 707 adds the obtained moving average (hereinafter referred to as the moving average brain oxygen concentration) and supplies it to the summing point 709.

The addition point 709 is composed of a subtractor or the like, and a target brain oxygen concentration is also supplied. The target cerebral oxygen concentration is a fixed value stored in advance in the memory of the controller 70 or the like, and is supplied to the addition point 709. In addition, at the summation point 709, the value of the moving average cerebral oxygen concentration is subtracted from the value of the target cerebral oxygen concentration. The value after subtraction is supplied to the PID controller 711 as a brain oxygen concentration deviation.

The PID controller 711 performs PID control based on the brain oxygen concentration deviation supplied from the addition point 709, and outputs a target pants pressure correction value. The target pants pressure correction value increases if the brain oxygen concentration indicated by the brain oxygen concentration signal (that is, the brain oxygen concentration of patient X) is lower than the target brain oxygen concentration, and the brain oxygen concentration indicated by the brain oxygen concentration signal is the target brain. If it is higher than the oxygen concentration, it decreases. With such a relationship, the force with which the compression pants 20 press the lower body of the patient X can be appropriately controlled. The target pants pressure correction value is supplied from the PID controller 711 to the addition point 715.

Further, the pressure control circuit 70A includes a moving average filter 713, an addition point 715, and a PID controller 717.

A pants pressure signal from the pants pressure sensor 33 is supplied to the moving average filter 713. The moving average filter 713 samples the value of the pants pressure indicated by the pants pressure signal every 0.002 seconds, and obtains the moving average for 20 samples (data of the pants pressure for 0.04 seconds). The moving average filter 713 adds the obtained moving average (hereinafter referred to as the moving average pants pressure) and supplies it to the summing point 715.

The addition point 715 is composed of an adder, a subtractor, and the like, adds a target pants pressure value and a target pants pressure correction value, and subtracts a moving average pants pressure value from the added values. The value calculated in this way is supplied to the PID controller 717 as the pants pressure deviation.

The PID controller 717 performs PID control based on the pants pressure deviation supplied from the addition point 715 to obtain the operation amount of the electropneumatic regulator 24, and supplies a control signal indicating the obtained operation amount to the electropneumatic regulator 24. To do. If the pants pressure deviation is a positive value (when the actual pants pressure is smaller than the target pants pressure + correction value), the operation amount is to newly supply the second compressed air to the compression pants 20. (The magnitude of the absolute value of the manipulated variable is the magnitude corresponding to the magnitude of the absolute value of the pants pressure deviation). The operation amount indicates that if the pants pressure deviation is a negative value (when the actual pants pressure is larger than the target pants pressure + correction value value), the second compressed air is newly removed from the compression pants 20. (The size of the absolute value of the operation amount becomes the size according to the size of the absolute value of the pants pressure deviation).

The electropneumatic regulator 24 operates with the operation amount indicated by the control signal supplied from the PID controller 717, and newly supplies the second compressed air in an amount corresponding to the operation amount to the compression pants 20, or the compression pants 20. I pull it out anew. The amount of the second compressed air to be supplied or the like changes according to the magnitude of the absolute value of the manipulated variable. By controlling the operation of the electropneumatic regulator 24 in this way, the internal pressure (that is, the compression force, the degree of expansion, etc.) of the compression pants 20 is controlled.

If the pants pressure deviation is a positive value, a predetermined amount (fixed amount) of second compressed air is newly supplied to the compression pants 20, and if the pants pressure deviation is a negative value, the compression pants 20 is used. The pressure control circuit 70A may be configured to newly supply a predetermined amount (fixed amount) of the operation amount for removing the second compressed air to the electropneumatic regulator 24. Further, the electropneumatic regulator 24 may be configured so that the new supply amount and the withdrawal amount of the second compressed air are fixed regardless of the magnitude of the absolute value of the operation amount.

With the above configuration, the pressure control circuit 70A controls the electropneumatic regulator 24 as the blood pressure and cerebral oxygen concentration of the patient X decrease to increase the amount of the second compressed air in the compression pants 20. The amount of the second compressed air inside (internal pressure of the compression pants 20) is increased. As a result, the compression pants 20 expands, the compression force on the lower body of the compression pants 20 increases, and the lower body is compressed, so that the blood of the lower body of the patient X can be squeezed out to the upper body, thereby causing the patient X to squeeze the blood. It is possible to approach the normal range (including keeping the blood pressure within the normal range) that can prevent fainting due to a decrease in blood pressure and cerebral oxygen concentration. Therefore, fainting due to a decrease in blood pressure (deficiency of cerebral oxygen) can be prevented.

In particular, in this embodiment, the compression force of the compression pants 20 is controlled by feeding back the cerebral oxygen concentration. The inventor of the present application has found that compression by the compression pants 20 improves not only blood pressure but also cerebral oxygen concentration, and has found that the cerebral oxygen concentration can be controlled by controlling the compression force of the compression pants 20. Since the cerebral oxygen concentration is directly related to syncope, the control based on the cerebral oxygen concentration can suitably compress the lower body of the patient X (for example, the cerebral oxygen concentration can be appropriately controlled) as in this embodiment. .. Further, by feeding back both the blood pressure and the cerebral oxygen concentration, the lower body of the patient X can be more preferably compressed.

Further, even if the amount of the second compressed air in the first wearing portion 20A of the compression pants 20 is the same, the volume of the patient's abdomen increases or decreases due to the abdominal breathing of the patient X, and the pants pressure also increases or decreases. Specifically, as the volume of the abdomen increases (when inhaling), the actual pants pressure increases, and when the volume of the abdomen decreases (when exhaling), the actual pants pressure decreases. Therefore, the ideal pants pressure for preventing a decrease in cerebral oxygen concentration and a decrease in blood pressure does not actually match the actual pants pressure (pants pressure that increases or decreases with breathing) (see FIG. 4). When the pants pressure rises above the ideal pants pressure, the patient X feels that breathing is difficult due to the compression of the compression pants 20, and when the pants pressure decreases below the ideal pants pressure, the compression force becomes insufficient. As described above, if the amount of the second compressed air in the first mounting portion 20A is constant regardless of the volume change of the abdomen, a stable compression force may not be obtained.

In this embodiment, the pants pressure is fed back, and the amount of the second compressed air in the compression pants 20 is adjusted according to the fed-back pants pressure to control the actual pants pressure to approach the target pants pressure. (In particular, by correcting the supply amount of the second compressed air according to the actual pants pressure), the change in the pants pressure due to breathing is canceled out (here, if the target pants pressure is the same, Even if there is breathing, the target pants pressure is kept constant). This makes it possible to eliminate the above-mentioned inconveniences such as difficulty in breathing and insufficient compression force.

4 and 5 show this compression system 1 (however, no feedback on cerebral oxygen concentration was given to a 69-year-old man with multiple system atrophy and hypotension (orthostatic hypotension). It is a graph when using (it is considered that good results can be obtained)), and the cerebral oxygen saturation (cerebral oxygen concentration), the standing angle (sleeping state is 0 degrees), and the blood pressure of the man. , Breath curve and pants pressure. The graph of FIG. 4A is a graph when the compression pants 20 are not operated (when compression is not performed). As shown in FIG. 4, when the compression system 1 did not operate, the man's standing caused a marked decrease in cerebral oxygen concentration and blood pressure, and the man became presyncope in 2 minutes and 30 seconds. .. The graph of FIG. 4B is a graph when the compression pants 20 are operated, and FIG. 5 is an enlarged graph of a part of FIG. 4B. As these graphs show, when the compression system was activated, even when the man stood up, he was able to prevent a decrease in cerebral oxygen concentration and blood pressure, and there was no sign of fainting. In addition, the effect of breathing on the pants pressure was canceled by the feedback control of the pants pressure, and the man did not feel respiratory distress (see FIG. 5).

Further, as in the above embodiment, the feedback control is performed by differentiating the cycle for taking the moving average (input cycle of the feedback information used for PID control) with respect to the blood pressure, the cerebral oxygen concentration, and the pants pressure. It can be more optimized. In particular, the pants pressure changes rapidly due to respiration compared to the blood pressure, etc., so by making the cycle for taking the moving average of the pants pressure shorter than the blood pressure, etc., more accurate feedback on the pants pressure etc. Control is possible.

Next, the shape of the compression pants 20 will be described.

FIG. 6 is a diagram showing the first mounting portion 20A. The first mounting portion 20A includes an expansion portion 211, a first surface fastener portion 212, a second surface fastener portion 213, and an air supply tube 214.

The expansion portion 211, the first surface fastener portion 212, and the second surface fastener portion 213 are formed of chemical fibers or the like.

The first surface fastener portion 212 and the second surface fastener portion 213, which are provided with hook-and-loop fasteners, are connected to both ends of the expansion portion 211, and the first mounting portion 20A has a band shape. The first mounting portion 20A is wrapped around the torso (particularly the lower part of the torso) including the abdomen of patient X. When the first mounting portion 20A is wound around the body of the patient, the first surface fastener portion 212 and the second surface fastener portion 213 wrap around the back and the surface fasteners engage with each other, so that the first mounting portion 20A Is wrapped around the body and fixed (Fig. 8 shows the mounted state). As a result, the first mounting portion 20A is mounted on the abdomen. When the first mounting portion 20A is mounted on the fuselage, the expanding portion 211 is located on the abdomen on the front side of the fuselage.

The expansion portion 211 has a bag body 211A inside. An air supply tube 214 is connected to the bag body 211A. The air supply tube 214 is connected to the electropneumatic regulator 24, and the second compressed air from the electropneumatic regulator 24 is supplied to the bag body 211A via the air supply tube 214. The supply of the second compressed air causes the bag body 211A to swell, thus expanding the swelling portion 211 (first mounting portion 20A), which compresses the patient X, especially the anterior abdomen.

FIG. 7 is a diagram showing the second mounting portion 20B. The second mounting portion 20B includes an expansion portion 221, a first surface fastener portion 222, a second surface fastener portion 223, an air supply tube 224, and an expansion / contraction portion 225.

The expansion portion 221, the first surface fastener portion 222, the second surface fastener portion 223, and the expansion / contraction portion 225 are formed of chemical fibers or the like.

The first surface fastener portion 222 and the second surface fastener portion 223, which are provided with hook-and-loop fasteners, are connected to both ends of the expansion portion 221, and the second mounting portion 20B wraps around the foot including the thigh and calf. It has a shape. When the second mounting portion 20B is wound around the patient's foot, the first surface fastener portion 222 and the second surface fastener portion 223 wrap around inside the foot and the surface fasteners engage with each other, so that the second mounting portion 20B is mounted. The portion 20B is wrapped around the foot and fixed (the attached state is shown in FIG. 8). As a result, the second mounting portion 20B is mounted on the left foot of patient X. When the second mounting portion 20B is mounted on the left foot, the expanding portion 221 is located on the outside of the left foot.

The expansion portion 221 has a bag body 221A inside. An air supply tube 224 is connected to the bag body 221A. The air supply tube 224 is connected to the electropneumatic regulator 24, and the second compressed air from the electropneumatic regulator 24 is supplied to the bag body 221A via the air supply tube 224. By supplying the second compressed air, the bag body 221A swells, and thus the swelling portion 221 (second mounting portion 20B) expands, whereby the foot of the patient X is compressed.

The second mounting portion 20B has a notch 226 for a portion that covers the knee when mounted on the foot, or a stretchable portion 225 (formed by a stretchable rubber fiber or the like). As a result, when the second mounting portion 20B is mounted on the foot, the knee and the back of the knee can be exposed or covered with the telescopic portion 225 (the telescopic portion 225 is omitted in FIG. 8). .).

Since the third mounting portion 20C has a left-right symmetrical structure with the second mounting portion 20B, the description of the configuration of the third mounting portion 20C will be omitted.

When the compression pants 20 are attached to the patient X, the compression pants 20 are divided into a first attachment portion 20A, a second attachment portion 20B and a third attachment portion 20C at the hip joint portion, and further, the second attachment portion 20B and the second attachment portion 20B. The third mounting portion 20C exposes the knee joint or covers it with an elastic portion. Therefore, even when the patient X performs an operation such as standing up, the compression pants 20 do not hinder the operation, and the patient X is easy to move even when the compression pants 20 are worn.

The shape of the compression pants 20 may be changed as appropriate. The back side portion of the first mounting portion 20A may be inflated, but the expansion may cause the back to warp when the patient X is sleeping. Therefore, as described above, the abdominal side It is better to inflate the part. Further, the second mounting portion 20B and the third mounting portion 20C may inflate at least one of the sole side (rear side) portion, the inner side (inner crotch side) portion, and the front side (front side) portion of the foot. If these portions are inflated, the patient X becomes difficult to move. Therefore, it is better for the second mounting portion 20B and the third mounting portion 20C to inflate the outer portion of the foot as described above.

The present invention is not limited to this embodiment, and various modifications (including deletion of the configuration) can be made to this embodiment. Although the modified examples are presented below, the modified examples illustrated below can be combined as appropriate.

In the above embodiment, the second compressed air is supplied to the first mounting portion 20A to the third mounting portion 20C by the same supply line, but the air is supplied to each of the first mounting portion 20A to the third mounting portion 20C. The lines may be separated and the amount of air (compressive force) may be controlled individually.

The object to be pressed may be a part of the living body. Further, the object to be pressed may be only the waist, only the legs, or the like. Moreover, the object to be pressed may be another part.

The blood pressure fed back is the blood pressure of the arm in the above, but it may be a blood pressure related to the blood pressure of the blood flow to the brain, or may be a blood pressure of another part.

Further, in the above embodiment, control is performed using the average blood pressure, but these are controlled so that the systolic blood pressure, the diastolic blood pressure, or the range between the two is within the permissible range for preventing fainting. Either of the above may be fed back. The fed-back blood pressure, cerebral oxygen concentration, and pants pressure do not have to be the blood pressure (average blood pressure) itself, the cerebral oxygen concentration itself, or the pants pressure itself as described above, and the information indirectly indicating these (however, the blood pressure itself). It is desirable that there is a one-to-one correlation between the information indicating blood pressure and blood pressure. The same applies to cerebral oxygen concentration and pants pressure.) Even when this information is fed back, blood pressure, cerebral oxygen concentration, and pants pressure will be fed back.

The actual fluctuation of the pants pressure described with reference to FIG. 3 is caused not only by the above-mentioned respiration but also by contraction of muscles such as legs. That is, the actual fluctuation of the pants pressure is caused by the volume change of the compression target portion (particularly, the portion where the compression pants are worn). Therefore, the compression force (supply amount of the second compressed air, etc.) may be controlled by feeding back the pants pressure of the second mounting portion 20B. The control of the pants pressure may be, for example, a control that can reduce the difficulty of breathing and the lack of compression force.

The information fed back to control the compression force (such as the amount of the second compressed air supplied to the pressurized pants 20) may be a physical quantity that changes according to the volume change of the compression target portion, and the pants pressure may be used. In addition, the pressure of exhaled breath may be detected and fed back. In the above embodiment, the physical quantity increases as the volume of the compression target portion increases, and decreases as the volume of the compression target portion decreases. However, the physical quantity used for the feedback control may decrease as the volume of the compression target portion increases and increase as the volume of the compression target portion decreases (in such a case, for example, when the physical quantity increases). The second compressed air in the pressurized pants 20 may be reduced, and when the physical quantity is reduced, the second compressed air in the pressurized pants 20 may be increased.)

For example, the controller 70 may acquire a physical quantity that changes according to a change in the volume of the part to be compressed, and control the compression force according to the change in the acquired physical quantity (for example, a volume change that can be specified by a change in the physical quantity). A cycle such as breathing may be set in advance in the controller 70, and the controller 70 may increase or decrease the compression force according to the set cycle. The degree of increase / decrease in the compression force (the amount of decreasing or increasing the second compressed air) may be fixed.

The parameters of the transfer function in the PID control may be appropriately determined according to the information to be fed back and the like (the parameters may be set so as to appropriately control the compression force in order to prevent fainting).

The compression system 1 may be configured so as not to feed back blood pressure or cerebral oxygen concentration. For example, when the patient X stands up, a predetermined amount of second compressed air may be supplied to the compression pants 20. Even in such a case, the pants pressure may be fed back to adjust the pants pressure as in the above embodiment.

In the compression system 1, the pants pressure is reduced when the abdominal volume increases, and the pants pressure is increased when the abdominal volume decreases, but only the pants pressure is reduced when the abdominal volume increases. Alternatively, control may be performed so as to increase the pants pressure only when the volume of the abdomen decreases. For example, when the pants pressure is lower than the target pants pressure, the amount of the second compressed air of the compression pants 20 may be increased, but when the pants pressure is higher than the target pants pressure, the second compressed air may be decreased.

In the above compression system, the target pants pressure is set based on the blood pressure and the target pants pressure is corrected based on the cerebral oxygen concentration. However, the target pants pressure is set based on the cerebral oxygen concentration to obtain the blood pressure. The target pants pressure may be corrected based on the above. Further, when the blood pressure to be fed back is within a predetermined range, the feedback control using the cerebral oxygen concentration may be performed. Further, when the feedback cerebral oxygen concentration is within a predetermined range, feedback control using blood pressure may be performed. The target cerebral oxygen concentration and blood pressure may be specified by the user or may be fixed values.

The cerebral oxygen concentration may be fed back, and the blood pressure and pants pressure may not be fed back. That is, the compression force may be controlled based on the information indicating the cerebral oxygen concentration so that the cerebral oxygen concentration becomes a normal value (target value), and at least one of the blood pressure and the pants pressure may not be used. The compression system 1 is set so that, for example, the blood pressure and / or cerebral oxygen concentration reaches or approaches each preset target value (in addition to an ideal normal value, a value low enough to prevent fainting). The amount of the second compressed air (pants pressure, etc.) in the pressurized pants 20 may be increased or decreased (for example, if the fed blood pressure is lower than the target value, the amount of the second compressed air is increased and the fed blood pressure is fed back. If is higher than the target value, the amount of the second compressed air should be reduced. The same applies to the cerebral oxygen concentration.)

The compression system 1 may be any one that performs servo control for at least one of blood pressure, cerebral oxygen concentration, and volume change of the compression target site, and its detailed configuration is not limited to the above embodiment and can be appropriately changed. ..

In the above embodiment, feedback control is performed by PID control, but feedback control may be performed by various methods. For example, in order to moderate the change in the target pants pressure, an upper limit value may be set for the increase amount of the target pants pressure to be increased according to the blood pressure deviation, or the increase amount may be fixed. The same applies to the target pants pressure correction value and the amount of operation. Further, in the above embodiment, the target pants pressure is set based on the deviation between the fed-back blood pressure and cerebral oxygen concentration and each of these target values, and the target pants pressure is set based on the fed-back pants pressure. The operation amount of the electropneumatic regulator 24 is determined by correction. For example, the target operation amount (which can be regarded as a kind of target pants pressure) is fed back to the blood pressure and cerebral oxygen concentration, and each of these targets. The actual operation amount of the electropneumatic regulator 24 may be determined by setting based on the deviation from the value and correcting the target operation amount based on the fed back pants pressure.

The operating amount (air supply amount and discharge amount) of the electropneumatic regulator 24 and the operating amount need only have a certain relationship, and the relationship is arbitrary.

As a method of pressurizing a part of the body of patient X, in addition to expansion by air, expansion by supply of various gases or liquids may be performed, or a part of the body may be mechanically tightened (for example,). Tighten with something like a belt whose inner circumference changes mechanically).

The target values such as blood pressure, cerebral oxygen concentration, and pants pressure may have a range, and the amount of operation (compression) of the electropneumatic regulator 24 so that the blood pressure, cerebral oxygen concentration, pants pressure, etc. are within the target values. Force etc.) may be controlled.

The present invention can also be applied to a compression system for preventing hypotension during emergency shock, surgery, blood donation, and dialysis. It can also be applied to a compression system for improving orthostatic hypotension such as neurological diseases (Shy-Drager syndrome, Parkinson's disease, etc.), spinal cord injury, and diabetic neuropathy. The present invention can also be applied to a compression system for preventing fainting of a fighter pilot.

1 ... compression system, 20 ... compression pants, 20A ... 1st mounting part, 20B ... 2nd mounting part, 20C ... 3rd mounting part, 24 ... electropneumatic regulator, 31 ... Barometric pressure sensor, 33 ... Pants pressure sensor, 41 ... Blood pressure sensor, 43 ... Brain oxygen concentration sensor, 70 ... Controller, 70A ... Pressure control circuit

Claims (4)

A compression wearing body that is attached to a target part of the lower body including at least the abdomen of the living body and presses the target part is provided, and the target part is pressed by the compression wearing body to suppress a decrease in blood pressure of the upper body of the living body. With a compression device
A control unit that controls the compression force by which the compression device presses the target portion by adjusting the amount of air inside the compression mounting body is provided.
The control unit acquires the pressure of the breath exhaled by the living body as a physical quantity that changes according to the volume change of the target part in a cycle sufficiently shorter than the respiratory cycle of the living body, and the acquired physical quantity is the target part. wherein reducing the amount of air when the change in the direction in which the volume is increased, and / or, the increasing amount of air when the physical amount acquired is changed in the direction in which the volume is reduced to the target site,
Compression system. A first feedback mechanism for feeding back the brain oxygen concentration of the living body to the control unit is further provided.
The control unit
A target value of the compression force is set based on the brain oxygen concentration fed back by the first feedback mechanism.
The compression force is brought closer to the target value according to the acquired change in the physical quantity.
The compression system according to claim 1. A second feedback mechanism for feeding back the blood pressure of the living body to the control unit is further provided.
The control unit sets a target value of the compression force based on the blood pressure and the brain oxygen concentration fed back by the second feedback mechanism.
The compression system according to claim 2. Before SL pressing attachment member is formed in a shape the covering in or elastic member to expose a joint site of sites when attached to the target site,
The compression system according to any one of claims 1 to 3 .