JP2016189830A - Pressing system and pressing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressing system capable of preferably pressing a target region, part of a living body.SOLUTION: A pressing system performs control of making actual underpants/panties pressure be closer to target underpants/panties pressure, by feeding back underpants/panties pressure before adjusting the amount of second compressed air in pressed underpants/panties depending on the fed-back underpants/panties pressure, to cancel a respiration origin variation in underpants/panties pressure (for example, the target underpants/panties pressure is made to be constant even when respiration exists, under the condition that the target underpants/panties pressure does not vary). Thereby, problems such as difficulty in respiration and shortage of pressing force can be eliminated.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a compression system and a compression device.

  As the compression system, for example, Patent Literature 1 discloses a blood pressure control device for non-invasively controlling blood pressure of a living body, and periodically detects a blood pressure related value related to the blood pressure value of the living body. A value detection device, a living body compression device attached to a part of the living body to compress a part of the living body, and a blood pressure related value detected by the blood pressure related value detection device is within a target value or a target range. Thus, there is disclosed a blood pressure control device including a compression state control device that automatically changes the compression state of the living body compression device based on the blood pressure related value.

JP 2005-348903 A

  In the blood pressure control device (compression system) described in Patent Document 1, it is difficult to compress a part of the living body (target part) with a suitable 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 inhibit abdominal breathing.) Moreover, the living body compression apparatus (compression apparatus) in Patent Document 1 is a general pants type, and has a disadvantage that the living body is difficult to move when worn.

  The first object of the present invention is to provide a compression system capable of suitably compressing a target site. A second 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 first aspect of the present invention is:
A compression device that compresses a target part that is a part of a living body;
A control unit that controls a compression force with which the compression device compresses the target portion, and
The control unit performs control to change the compression force according to a volume change of the target part.
It is characterized by that.
The control unit may decrease the compression force when the volume of the target region increases and / or increase the compression force when the volume of the target region decreases.

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 in accordance with a volume change of the target region, thereby the compression force Close to the target value,
You may do it.

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 it.

The compression system according to the second aspect of the present invention is:
A compression device that compresses a target part that is a part of a living body;
A control unit that controls a compression force with which the compression device compresses the target portion;
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 present invention is:
It is attached to a target part that is a part of a living body, and includes a compression wearing body that compresses the target part.
The compression mounting body is composed of a plurality of mounting bodies divided at the 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 attached to the target part. Yes,
It is characterized by that.

  According to the compression system according to the first and second aspects of the present invention, a part of the living body can be suitably compressed. Moreover, according to the compression apparatus which concerns on the 3rd viewpoint of this invention, even if the said compression apparatus is mounted | worn, a biological body is easy to move.

It is a figure showing the whole compression system composition concerning one embodiment of the present invention. It is a figure which shows the block configuration of the pressure control circuit which concerns on one Embodiment of this invention. It is a figure which shows relationship graphs, such as an ideal underpants pressure and an actual underpants pressure. It is a figure which shows relationship graphs, such as underpants pressure, blood pressure, and brain oxygen saturation. It is a figure which shows relationship graphs, such as underpants pressure, blood pressure, and brain oxygen saturation. It is a figure of a 1st mounting part. It is a figure of the 2nd mounting part. It is a figure which shows a mode when compression pants are mounted | worn with the human body.

  A 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 a compression pant 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 spaces that inflate and contract the compression pants 20 attached to the patient X. Configure the pressure system.

  The compression pants 20 are attached to the lower body of the patient X suffering from orthostatic hypotension and press the lower body of the patient X. Specifically, the lower body of the patient X is pressed when the patient X gets up (when blood pressure or the like decreases). By this compression, the blood of the lower body of the patient X is squeezed out to the upper body, and the lowering of the blood pressure of the upper body and the decrease of the brain oxygen concentration (also referred to as brain oxygen saturation) when the patient X gets up from the sleeping state are suppressed. To do. This prevents fainting due to a decrease in blood pressure or a decrease in brain 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 a first attachment part 20A attached to the abdomen, the other is a second attachment part 20B attached to the left foot, and the last one is attached to the right foot. It is the 3rd mounting part 20C with which it mounts.

  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 abdomen of the patient X is compressed by the expansion of the first mounting part 20A. The left foot of the patient X is compressed by the expansion of the second mounting portion 20B. The right foot of the patient X is compressed by expanding the third mounting portion 20C. By such compression, the lower body of the 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 reduces the pressure of the first compressed air supplied from the air tank 22 to a pressure that can be used by the electropneumatic regulator 24. Note that 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 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 extracts 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 (the first mounting portion 20A to the third mounting portion 20C). When extracting the second compressed air 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 and opens and closes under the control of the controller 70. When opened, the exhaust valve 25 exhausts the first compressed air in the pneumatic system to the outside of the pneumatic system. It should be noted that a silencer may be attached to the exhaust valve 25, thereby reducing the sound during exhaust.

  The relief valve 26 is disposed in the vicinity of the electropneumatic regulator 24, and releases the second compressed air when the 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 pressure. . Thus, 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 an atmospheric pressure sensor 31, a pant 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, Is provided. These constitute a control system for controlling the pneumatic system.

  The atmospheric pressure sensor 31 is a semiconductor pressure sensor or the like. The atmospheric pressure sensor 31 is disposed between the air tank 22 and the decompressor 23 and detects the atmospheric 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 detected atmospheric pressure of the first compressed air to the controller 70.

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

  The blood pressure sensor 41 is attached to the arm of the patient X and includes a sphygmomanometer that detects the blood pressure of the upper body of the patient X. The blood pressure sensor 41 calculates an average blood pressure based on the detected blood pressure, and supplies an electrical 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 that is attached to the head (such as a forehead) of the patient X and detects a cerebral oxygen concentration (concentration of oxygen supplied to the brain by blood flow) that is the concentration of the cerebral oxygen of the patient X. is there. The brain oxygen concentration sensor 43 supplies an electric signal indicating the detected brain oxygen concentration (hereinafter referred to as a brain oxygen concentration signal) to the controller 70.

  The emergency stop switch 52 includes a push button and 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 is used to input a target value of the blood pressure of the patient X when the lower body of the patient X is compressed with the compression pants 20, and includes a dial type operation input device. The operation unit 54 is a target value (hereinafter referred to as target blood pressure) input by a user who operates the compression system 1 (may be the patient X itself or another person such as a doctor or a nurse). Is supplied to the controller 70 (hereinafter referred to as a target blood pressure signal). 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 anything predicted by a doctor or the like.

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

  The controller 70 includes various processors such as a microcomputer that executes processing in accordance with a program and logic circuits that do not use the program. The controller 70 controls the operation of the compression system 1. The controller 70 may be a digital circuit or an analog circuit. 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 (a value of atmospheric pressure that is determined to be an abnormal high pressure), the exhaust valve Open 25. By such control, when the pressure of the first compressed air in the pneumatic system of FIG. 1 becomes an abnormally high pressure, the first compressed air in the pneumatic system can be discharged. Thereby, the atmospheric pressure in the pneumatic system can be lowered, and the safety of the compression system 1 can be ensured.

  In addition, when an emergency stop signal is supplied from the emergency stop switch 52 (for example, pressed when there is an abnormality in the patient X), 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. Such an operation can ensure the safety of the compression system 1.

  Further, the controller 70 controls the electropneumatic regulator 24 with a control signal to adjust the amount of the second compressed air in the compression pants 20 and compress the lower body of the patient X (hereinafter referred to as compression force). To control. The electropneumatic regulator 24 is controlled by a 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 for realizing a block diagram as shown in FIG. 2 may be prepared.

  The pressure control circuit 70 </ b> A 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 second, 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 “moving average blood pressure”) and supplies it to the combination point 703. The average blood pressure may be calculated on the moving average filter 701 side. Specifically, the blood pressure sensor 41 outputs an electrical signal indicating blood pressure, and the moving average filter 701 samples a blood pressure value based on the electrical signal (for example, sampling every 0.01 seconds). The moving average blood pressure may be calculated from the blood pressure value of a predetermined sampling number (200 samples).

  The addition point 703 includes a subtracter and the like, and a target blood pressure is also supplied. 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 point 703, the value of moving average blood pressure is subtracted from the value of 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 pant pressure. The parameter of the transfer function of 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 pant pressure increases when the blood pressure indicated by the blood pressure signal (that is, the blood pressure value of the 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. Such a relationship makes it possible to appropriately control the force with which the compression pants 20 compress the lower body of the patient X. The target pant pressure is supplied from the PID controller 705 to the addition point 715.

  The pressure control circuit 70 </ b> A includes a moving average filter 707, an addition point 709, and a PID controller 711.

  The moving oxygen 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 a moving average for 20 samples (data of brain oxygen concentration for 0.2 seconds). The moving average filter 707 adds the obtained moving average (hereinafter referred to as a moving average brain oxygen concentration) and supplies the sum to the matching point 709.

  The addition point 709 includes a subtractor and the like, and a target brain oxygen concentration is also supplied. It is assumed that the target brain oxygen concentration is a fixed value stored in advance in a memory of the controller 70 and supplied to the addition point 709. In addition point 709, the value of moving average brain oxygen concentration is subtracted from the value of target brain oxygen concentration. The reduced value 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 pant pressure correction value. The target pant 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. Such a relationship makes it possible to appropriately control the force with which the compression pants 20 compress the lower body of the patient X. The target pant pressure correction value is supplied from the PID controller 711 to the addition point 715.

  The pressure control circuit 70 </ b> A includes a moving average filter 713, an addition point 715, and a PID controller 717.

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

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

  The PID controller 717 performs PID control based on the pant pressure deviation supplied from the addition point 715 to obtain an operation amount of the electropneumatic regulator 24 and supplies a control signal indicating the obtained operation amount to the electropneumatic regulator 24. To do. When the pant pressure deviation is a positive value (when the actual pant pressure is smaller than the target pant pressure + correction value), the operation amount is to supply the compressed pant 20 with new second compressed air. (The magnitude of the absolute value of the manipulated variable is a magnitude corresponding to the magnitude of the absolute value of the pants pressure deviation). The manipulated variable indicates that the second compressed air is newly extracted from the compressed pant 20 when the pant pressure deviation is a negative value (when the actual pant pressure is larger than the target pant pressure + correction value). (The magnitude of the absolute value of the manipulated variable is a magnitude corresponding to the magnitude 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 Or pull out a new one. The amount of the second compressed air to be supplied varies depending on 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 pant pressure deviation is a positive value, a predetermined amount (fixed amount) of second compressed air is newly supplied to the compression pant 20, and if the pant pressure deviation is a negative value, the compression pant 20 The pressure control circuit 70 </ b> A may be configured to supply the electropneumatic regulator 24 with an operation amount that newly extracts a predetermined amount (fixed amount) of the second compressed air. Further, the electropneumatic regulator 24 may be configured such that the new supply amount and the extraction amount of the second compressed air are fixed regardless of the absolute value of the operation amount.

  With the above configuration, the pressure control circuit 70A controls the electropneumatic regulator 24 to increase the amount of the second compressed air in the compression pants 20 as the blood pressure and brain oxygen concentration of the patient X decrease, and the compression pants 20 The amount of the second compressed air inside (the internal pressure of the compression pants 20) is increased. As a result, the compression pant 20 expands, the compression force on the lower body of the compression pant 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. It is possible to bring it closer to the normal range (including making 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 (brain oxygen deficiency) can be prevented.

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

  Even if the amount of the second compressed air in the first mounting portion 20A of the compression pant 20 is the same, the volume of the patient's abdomen increases or decreases due to the abdominal breathing of the patient X, and thereby the pant pressure also increases or decreases. Specifically, if the volume of the abdomen increases (when inhaling), the actual pant pressure increases, and if the volume of the abdomen decreases (when exhaled), the actual pant pressure decreases. For this reason, the ideal pant pressure for preventing a decrease in cerebral oxygen concentration and a decrease in blood pressure does not actually match the actual pant pressure (pant pressure that increases or decreases by respiration) (see FIG. 4). When the pant pressure rises above the ideal pant pressure, the patient X feels that breathing is difficult due to the compression of the compression pant 20, and when the pant pressure decreases below the ideal pant pressure, the compression force becomes insufficient. Thus, 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 pant pressure is fed back, and the amount of the second compressed air in the compressed pant 20 is adjusted according to the fed back pant pressure, thereby controlling the actual pant pressure closer to the target pant pressure. (Especially, by correcting the supply amount of the second compressed air according to the actual pant pressure), the change of the pant pressure due to breathing is canceled out (if the target pant pressure is the same, The target pants pressure is kept constant even if there is a breath). As a result, the inconveniences such as difficulty in breathing and insufficient compression force can be solved.

  4 and 5 show that this compression system 1 was not applied to a 69-year-old male with multisystem atrophy and hypotension (orthostatic) (however, brain oxygen concentration feedback was not performed. Even if brain oxygen concentration feedback was performed) It is thought that a good result can be obtained.) Is a graph when using the brain oxygen saturation (brain oxygen concentration), standing angle (sleeping state is 0 degree), blood pressure, The breathing curve and the pants pressure are shown. The graph in 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 does not operate, the standing of the male causes a significant decrease in cerebral oxygen concentration and a decrease in blood pressure, and the male is in a prefainting state in 2 minutes and 30 seconds. . 4B is a graph when the compression pants 20 are operated, and FIG. 5 is a graph in which a part of FIG. 4B is enlarged. As these graphs show, when the compression system was operated, even if the man stood up, he could prevent a decrease in cerebral oxygen concentration and a decrease in blood pressure, and there was no sign of fainting. Moreover, the influence on the pant pressure due to respiration was canceled by the feedback control of the pant pressure, and the man did not feel breathing difficulty (see FIG. 5).

  Further, as in the above embodiment, the feedback control can be performed by varying the moving average period (input period of feedback information used for PID control) for blood pressure, cerebral oxygen concentration, and pant pressure. It can be made more appropriate. In particular, the pant pressure changes abruptly in a short time due to breathing compared to the blood pressure, etc., so by making the moving average of the pant pressure shorter than the blood pressure etc., more accurate feedback on the pant pressure Control becomes possible.

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

  FIG. 6 is a diagram showing the first mounting portion 20A. 20 A of 1st mounting parts are provided with the expansion part 211, the 1st surface fastener part 212, the 2nd surface fastener part 213, and the air supply tube 214. As shown in FIG.

  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.

  A first hook-and-loop fastener portion 212 and a second hook-and-loop fastener portion 213 each having a hook-and-loop fastener are connected to both ends of the inflatable portion 211, and the first mounting portion 20A has a band shape. 20 A of 1st mounting parts are wound around the trunk | drum (especially lower part of a trunk | drum) containing the abdominal part of the patient X. FIG. When the first mounting portion 20A is wound around the patient's torso, the first hook-and-loop fastener portion 212 and the second hook-and-loop fastener portion 213 wrap around the back, and the hook-and-loop fasteners engage with each other. Is wound around the body and fixed (shown in FIG. 8). As a result, the first attachment portion 20A is attached to the abdomen. When the first attachment part 20A is attached to the trunk, the inflating part 211 is located in the abdomen on the front side of the trunk.

  The inflating part 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. By supplying the second compressed air, the bag body 211A is inflated, and thus the inflating part 211 (first mounting part 20A) is inflated, and thereby the front X of the patient X, in particular, is compressed.

  FIG. 7 is a diagram showing the second mounting portion 20B. The second mounting part 20 </ b> B includes an inflating part 221, a first hook-and-loop fastener part 222, a second hook-and-loop fastener part 223, an air supply tube 224, and a telescopic part 225.

  The inflatable portion 221, the first hook-and-loop fastener portion 222, the second hook-and-loop fastener portion 223, and the stretchable portion 225 are formed of chemical fibers or the like.

  A first hook-and-loop fastener portion 222 and a second hook-and-loop fastener portion 223 each having a hook-and-loop fastener are connected to both ends of the inflatable portion 221, and the second mounting portion 20B wraps around a leg including a thigh and a calf. It has a shape. When the second mounting portion 20B is wound around the patient's foot, the first hook-and-loop fastener portion 222 and the second hook-and-loop fastener portion 223 wrap around the inside of the foot and the hook-and-loop fasteners engage with each other. The portion 20B is wound around the foot and fixed (shown in FIG. 8). As a result, the second mounting portion 20B is mounted on the left foot of the patient X. When the second mounting portion 20B is mounted on the left foot, the inflating portion 221 is positioned outside the left foot.

  The inflating part 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 is inflated, so that the inflating portion 221 (second mounting portion 20B) is inflated, and thereby the foot of the patient X is compressed.

  Note that the second mounting portion 20B has a notch 226 at a portion that covers the knee when it is mounted on a foot, or an expansion / contraction portion 225 (formed by an expandable rubber fiber or the like). Accordingly, 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 stretchable portion 225 (the stretchable portion 225 is omitted in FIG. 8). .)

  In addition, since the 3rd mounting part 20C has the structure of the 2nd mounting part 20B and right and left object, description of the structure of the 3rd mounting part 20C is abbreviate | omitted.

  When the compression pants 20 are attached to the patient X, the hip joint part is divided into a first attachment part 20A, a second attachment part 20B, and a third attachment part 20C, and the second attachment part 20B and The third mounting portion 20C exposes the knee joint or covers it with an extendable portion. For this reason, 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 can move easily even when the compression pants 20 are worn.

  In addition, you may change the shape of the compression pants 20 suitably. The first mounting portion 20A may be configured such that the back side portion is inflated, but the back may be warped when the patient X is sleeping due to the expansion, so as described above, It is better to inflate the part. The second mounting portion 20B and the third mounting portion 20C may inflate at least one of the back side (rear side) portion, the inner side (inner crotch side) portion, and the front side (front side) portion of the foot. When these portions are inflated, the patient X becomes difficult to move. Therefore, it is better that the second mounting portion 20B and the third mounting portion 20C have the portions on the outside of the foot expanded as described above.

  The present invention is not limited to this embodiment, and various changes (including deletion of the configuration) can be added to this embodiment. Although a modification is shown below, the modification illustrated below can be combined suitably.

  In the above-described embodiment, the second compressed air is supplied to the first mounting portion 20A to the third mounting portion 20C through the same supply line, but the supply of air to each of the first mounting portion 20A to the third mounting portion 20C. Separate lines may be used to individually control the amount of air (compression force).

  The object to be compressed may be a part of the living body. Further, the subject to be compressed may be only the waist, the feet, or the like. Further, the object to be compressed may be another part.

  In the above description, the blood pressure to be fed back is the blood pressure of the arm, but it may be blood pressure related to the blood pressure of blood flow to the brain, and may be the blood pressure of other parts.

  Further, in the above embodiment, the control is performed using the average blood pressure, but these are set so that the systolic blood pressure, the diastolic blood pressure, or the range between them is within an allowable range for preventing fainting. Any of the above may be fed back. The blood pressure, brain oxygen concentration, and pant pressure to be fed back may not be the blood pressure (average blood pressure) itself, the brain oxygen concentration itself, or the pant pressure itself as described above, but information that indirectly indicates these (however, the blood pressure itself) It is desirable that there is a one-to-one correlation between the information indirectly indicating blood pressure, and the same applies to brain oxygen concentration and pant pressure. Even when these pieces of information are fed back, blood pressure, brain oxygen concentration, and pants pressure are fed back.

  In addition, the fluctuation | variation of the actual pants pressure demonstrated with reference to FIG. 3 arises not only by said respiration but by contraction of muscles, such as a foot. That is, the actual fluctuation of the pants pressure is caused by the volume change of the compression target part (particularly, the part where the compression pant is attached). For this reason, you may control compression force (the supply amount of 2nd compressed air, etc.) by feeding back the underpants pressure of the 2nd mounting part 20B. Note that the control of the pant pressure may be, for example, 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 part. In addition, the pressure of the exhaled breath may be detected and fed back. In the above-described embodiment, the physical quantity increases as the volume of the compression target part increases, and decreases as the volume of the compression target part decreases. However, the physical quantity used for feedback control may be decreased when the volume of the compression target part is increased, and may be increased when the volume of the compression target part is reduced (in this case, for example, when the physical quantity is increased). The second compressed air in the pressurized pants 20 is 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 in accordance with a change in volume of the compression target part, and may control the compression force in accordance with the change in the acquired physical quantity (for example, a volume change that can be specified by a change in physical quantity). For example, the controller 70 may set a cycle of breathing in advance in the controller 70, and the controller 70 may increase or decrease the compression force in accordance with the set cycle. The degree of increase / decrease in the compression force (the amount by which the second compressed air is reduced or increased) 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 (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 not to feed back blood pressure or cerebral oxygen concentration. For example, when the patient X stands up, a predetermined amount of the second compressed air may be supplied to the compression pants 20. Even in such a case, the pant pressure may be adjusted by feeding back the pant pressure as in the above embodiment.

  In the compression system 1, the pant pressure is decreased when the volume of the abdomen is increased, and the pant pressure is increased when the volume of the abdomen is decreased, but only the pant pressure is decreased when the volume of the abdomen is increased. Or you may make it perform control which only increases pants pressure, when the volume of an abdominal part reduces. For example, when the pant pressure is lower than the target pant pressure, the amount of the second compressed air of the compressed pant 20 is increased, but when the pant pressure is higher than the target pant pressure, the second compressed air may be decreased.

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

  The brain oxygen concentration may be fed back, and the blood pressure and pant pressure may not be fed back. That is, the compression force may be controlled based on the information indicating the brain oxygen concentration so that the brain oxygen concentration becomes a normal value (target value), and at least one of blood pressure and pant pressure may not be used. In the compression system 1, for example, blood pressure and / or cerebral oxygen concentration are set to or close to respective target values (an ideal normal value or a value that is low enough to prevent fainting). What is necessary is just to increase / decrease the amount of the 2nd compressed air (pants pressure etc.) in the pressurization underpants 20 (for example, if the blood pressure to be fed back is lower than the target value, the amount of the 2nd compressed air is increased and the blood pressure fed back. If the value is higher than the target value, the amount of the second compressed air may be reduced, and the same applies to the brain oxygen concentration.)

  The compression system 1 only needs to perform servo control for at least one of, for example, blood pressure, brain oxygen concentration, and volume change of the compression target portion, and the detailed configuration thereof is not limited to the above embodiment and can be changed as appropriate. .

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

  The operation amount (air supply amount or discharge amount) of the electropneumatic regulator 24 and the operation amount may be in a certain relationship, and the relationship is arbitrary.

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

  Target values such as blood pressure, cerebral oxygen concentration, and pant pressure may vary, and the operation amount (compression) of the electropneumatic regulator 24 is set so that the blood pressure, cerebral oxygen concentration, pant pressure, and the like fall within the target value range. 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, diabetic neuropathy and the like. The present invention is also applicable to a compression system for preventing fainting of a fighter pilot.

DESCRIPTION OF SYMBOLS 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 (6)

A compression device that compresses a target part that is a part of a living body;
A control unit that controls a compression force with which the compression device compresses the target portion, and
The control unit performs control to change the compression force according to a volume change of the target part.
A compression system characterized by that. The control unit decreases the compression force when the volume of the target part increases, and / or increases the compression force when the volume of the target part decreases.
The compression system according to claim 1. A first feedback mechanism for feeding 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 in accordance with a volume change of the target region, thereby the compression force Close to the target value,
The compression system according to claim 1 or 2, characterized in that. A second feedback mechanism for feeding 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.
The compression system according to claim 3. A compression device that compresses a target part that is a part of a living body;
A control unit that controls a compression force with which the compression device compresses the target portion;
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.
A compression system characterized by that. It is attached to a target part that is a part of a living body, and includes a compression wearing body that compresses the target part.
The compression mounting body is composed of a plurality of mounting bodies divided at the 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 attached to the target part. Yes,
A compression device characterized by that.