JP4571156B2 - Compression treatment system - Google Patents

Abstract

A compression treatment system (10) is provided that includes a first bladder (46a, 46b, 46c, 48a, 48b, 48c) supported about a limb. A second bladder is supported about the limb. The bladders are in fluid communication with a fluid source (50) and the bladders are inflated such that the first bladder is inflated for a first time period and the second bladder is inflated for a second time period. The second time period is initiated within the first time period. A single pressure sensor communicates with the first bladder and the second bladder.

Description

Detailed Description of the Invention

Background 1. TECHNICAL FIELD The present disclosure relates generally to the field of vascular therapy for application to a body limb, and more particularly to a compression treatment system having a controller that regulates fluid flow.

2. 2. Description of Related Art Conditions that form blood clots, such as deep vein thrombosis (DVT) and peripheral edema, are a significant problem for immobile patients. Such patients include patients undergoing surgery, patients with numbness, long-term bed care patients and others. These clot symptoms typically occur in the deep veins of the lower limbs and / or pelvis. These veins such as the iliac, femoral, popliteal and tibia circulate oxygen-depleted blood to the heart. When these venous blood circulations are suppressed due to disease, injury or inactivity, blood tends to accumulate or become congested. Static congestion leads to a good environment for dangerous clot formation. The major risk associated with this condition is cardiovascular circulatory disturbance. The most serious is that the clot fragments peel off and move. Pulmonary embolism forms a main pulmonary artery occlusion and is life threatening.

  Symptoms associated with the patient's immobility and the resulting risks can be suppressed or alleviated by applying intermittent pressure to the legs, including the patient's limbs, such as the thighs, calves, feet, etc., to assist in blood circulation. Well known devices such as one-piece pads and compression boots have been used to assist in blood circulation. See, for example, US Pat. Nos. 6,290,662 and 6,494,852.

  For example, sequential compression devices consisting of an air pump connected to a disposable wrap pad with a series of air tubes have been used. The wrap pad is configured to be placed around a portion of the patient's leg, such as the thigh, calf, or foot. Multiple pads can be attached to the leg to cover various parts of the leg. Next, air is sequentially forced through different parts of the wrapping pad to create pressure around the thigh, calf, or foot, thereby improving venous perfusion.

  These known devices have various drawbacks due to their bulky and cumbersome use. These disadvantages are disadvantageous in that they reduce patient comfort and adaptability and hinder patient mobility during postoperative recovery.

  In addition, these known sequential compression devices typically include a controller assembly that regulates the air flow and pressure flow and pressure in the winding pad. The controller assembly can be attached to the bed and plugged into a wall power outlet during use. However, this organization can be a challenge when the patient needs to perform a specific task, such as bathing or physical therapy. In such a situation, it is disadvantageous that the vascular treatment must be interrupted because the pad is usually removed. Accordingly, these controller assemblies suffer from various drawbacks because they are not amenable to patient transport or movement and are usually not suitable for inflation of the thigh, calf, and foot pads.

  Thus, a compression treatment system having a controller that provides continuous vascular therapy in response to patient transport and movement, suitable for inflating the thigh, calf, and foot sleeve, is a disadvantage of the prior art. There is a need to overcome certain points and drawbacks. It would be more desirable if the system could automatically detect the type of sleeve connected to it. It is further desirable to include a pneumatic circuit in the system that facilitates pressure monitoring with a single pressure transducer to achieve the benefits of the present disclosure. The compression treatment system is intended to be simple and efficient to manufacture.

Summary Therefore, to overcome the disadvantages and drawbacks of the prior art, the thigh, calf and foot sleeves are adapted to be inflated and provide continuous vascular treatment in response to patient transport and movement A compression treatment system having a controller is provided. Preferably, the system automatically detects the type of sleeve connected to it. Most desirably, the system includes the pneumatic circuit that facilitates pressure monitoring with a single pressure transducer to achieve the benefits of the present disclosure. The compression treatment system can be manufactured easily and efficiently.

  A compression treatment system according to the principles of the present disclosure can provide intermittent pneumatic compression for DVT prevention. The compression treatment system can also include vein refill detection, which will be described later, and is compact, quiet, lightweight, and equipped with a battery power source. The compression treatment system also has the ability to provide sequential tilt compression for each limb individually and the flexibility to provide compression for various sleeves including, for example, three bladders. The sleeve may include a thigh length tear mechanism and a knee length sleeve as described below. In addition, the compression treatment system can provide high pressure and slow compression to the leg sleeve. The compression treatment system provides DVT prevention without interruption wherever the system is used within the treatment facility, so that the patient can be worn and used continuously throughout the entire risk period.

  The compression treatment system can be portable to provide continuous therapy for patients at risk for DVT. This configuration has the advantage that continuous vascular treatment is facilitated even during the execution of patient activities and tasks, such as transport for examination, bathing, physical therapy, and the like. Therefore, the compression treatment system provides a battery-operated controller even when it is not plugged into the outlet so that it is comfortable, compact, and lightweight so that treatment can be interrupted and moved with the patient as needed. The

  The compression treatment system includes a controller, a tube set, and a sleeve. For example, the compression treatment system delivers air through a tube set to a pair of disposable sleeves, each corresponding to each limb. Each sleeve has three bladders corresponding to the ankle, calf, and thigh. The compression treatment system compresses one of the extremities independently, that is, left or right. If both the left and right are connected, inflation is alternated between both limbs. Alternatively, only one sleeve may be connected.

  Alternatively, the compression treatment system is used as a slow foot compression device. In this configuration, the compression treatment system includes a pair of disposable foot covers for a single patient and a single bladder instead of a sleeve. A single foot cover may be used. The compression treatment system also provides the use of foot covers for the first limb and the use of sleeves for the second limb.

  The compression treatment system includes a tube set connector port that interlocks with the tube set in a paired configuration. When the pressure treatment system is first turned on, the system determines which ports are connected to the sleeves and what kind of sleeves are leg sleeves or foot covers are connected to these ports. Air is sent through the port until it recognizes. Compression therapy is delivered to the appropriately connected port of the sleeve.

  For example, the compression treatment system provides clinical parameters for vascular therapy, such as an 11 second inflation cycle followed by a 20-60 second evacuation period depending on the venous refill measurement. The compression time for 11 seconds is sequential, and the first bladder starts to expand at 0 seconds. At 2.67 seconds, the second bladder begins to expand, and at 5.67 seconds, the third bladder begins to expand. After 11 seconds, all three bladders evacuate. The pressure during the inflation period must remain inclined so that the first bladder exceeds the second bladder and the second bladder exceeds the third bladder. By way of example only, the pressure at the end of the cycle can be 45 mmHg for the first bladder, 40 mmHg for the second bladder, and 30 mmHg for the third bladder. Compression continues in this cycle pattern until the compression treatment system is turned off or the controller issues a warning.

  In another non-limiting example, the foot compression parameters include a 5-second inflation cycle followed by the same exhaust time (20-60 seconds) as provided above for sleeve compression. Can do. The set pressure target at the end of the cycle for the foot sleeve is 130 mmHg by the end of the 5 second inflation time.

  Vein refill detection is performed with this compression treatment system. Venous refill detection includes trapping a small amount of air in the second bladder and monitoring the blood in the limb of the patient to refill and increase pressure. When the compression treatment system reaches the set pressure and every 30 minutes thereafter, the controller measures venous refill and adjusts the evacuation time between inflation cycles for any of the individual limbs between 20-60 seconds. . Adjust the evacuation time using the longer venous refill measurement from both limbs.

  The compression treatment system benefits from several advantages, including a portable, small and lightweight battery power controller. The compression treatment system can also be used on one or both limbs and can provide slow compression on the foot cover. The compression treatment system can also detect the type of sleeve connected and apply the appropriate compression automatically.

  The compression treatment system also includes a pneumatic circuit for use with the compression treatment system designed to allow bladder monitoring and pressure monitoring using a single transducer. The pressure monitored from the manifold side of the solenoid valve accounts for the pressure drop across the valve, taking advantage of the additional advantage that only one transducer is required to monitor any connected bladder. This arrangement has the advantage of low production costs and reduced maintenance requirements, particularly with respect to transducer calibration.

  In one embodiment in accordance with the principles of the present disclosure, a compression treatment system includes a first bladder that is supported about a limb. The second bladder is also supported around the limbs. The bladder is in fluid communication with the fluid source and expands so that the first bladder expands for a first time period and the second bladder expands for a second time period. The second time period starts within the first time period. A single pressure sensor is in communication with the first bladder and the second bladder. The pressure transducer is configured to monitor the pressure of each bladder.

  The compression treatment system can include a controller in communication with the pressurized fluid source and the pressure transducer. The controller is configured to monitor and regulate the bladder pressure. The controller can be placed in a portable housing. The housing can include a plurality of ports connectable to a plurality of bladders.

  The pressure transducer can monitor the pressure for each of a plurality of ports to determine whether a bladder is connected to it and send a signal representative of it to the controller. The controller may include a separate valve that regulates bladder expansion. A pneumatic circuit may be formed in the compression treatment system. The pressure transducer is coupled to the pneumatic circuit and can be disposed between the pressurized fluid source and the valve in the pneumatic circuit.

  The compression treatment system can include a third bladder supported around the foot. The third bladder is in fluid communication with the fluid source and a single pressure sensor is in communication with the bladder. The pressurized fluid source can alternately inflate bladders arranged around the limbs and bladders arranged around the legs.

  In an alternative embodiment, the compression treatment system includes a first plurality of bladders supported around the first limb. A second plurality of bladders are supported around the second limb, and the bladders are in fluid communication with a fluid source. The first bladder of the first plurality of bladders expands for a first time period, and the second bladder of the first plurality of bladders expands for a second time period. The second time period starts within the first time period.

  The first bladder of the second plurality of bladders expands for a third time period, and the second bladder of the second plurality of bladders expands for a fourth time period. The fourth time period starts within the third time period. A single pressure sensor communicates with the bladder. The pressurized fluid source can inflate alternately a bladder placed around the first limb and a bladder placed around the second limb.

  In another embodiment, a compression treatment system includes a first plurality of bladders supported around a first limb and a second plurality of bladders supported around a second limb. Each bladder of the first plurality of bladders and the second plurality of bladders has a separate valve in communication therewith. The valve is in fluid communication with a fluid source.

  The first valve opens so that the first bladder of the first plurality of bladders expands for a first time period, and the second valve causes the second bladder of the first plurality of bladders to expand for a second time period. open. The second time period starts within the first time period. The third valve opens so that the third bladder of the first plurality of bladders expands for a third time period. The third time period starts within the second time period.

  The fourth valve opens so that the first bladder of the second plurality of bladders expands for a fourth time period, and the fifth valve allows the second bladder of the second plurality of bladders to expand for a fifth time period. open. The fifth time period starts within the fourth time period. The sixth valve opens so that the sixth bladder of the second plurality of bladders expands for a sixth time period. The sixth time period starts within the fifth time period. A single pressure sensor communicates with the bladder.

Detailed Description of Exemplary Embodiments An exemplary embodiment of the disclosed compression treatment system and method of operation is described in terms of vascular therapy including a prophylactic compression device for application to the extremities of the body, and the thigh This will be described in more detail in terms of a compression treatment system having a controller that is adapted to inflate the calf, ankle, and foot sleeve and can accommodate patient transport and movement. The compression treatment system is intended to be used to prevent and overcome risks associated with patient immobility. It is further contemplated that the compression treatment system may relieve a medical condition resulting from the patient's immobility to prevent, for example, DVT, peripheral edema, and the like. The compression treatment system according to the present disclosure is intended to be attributed to any type of venous compression system, including but not limited to prophylactic sequential compression devices. The term “prophylactic sequential” should not be construed as limiting the general venous compression treatment system described herein. Rather, it is envisaged that the present disclosure covers a wide range of, for example, patients undergoing surgery, patients with sensory paralysis, long-term bed therapy, obese patients, elderly patients, malignant tumor patients, thromboembolic patients, and the like. We are considering application to a wide range of stationary medical conditions.

  In the following description, the term “proximal” refers to the portion of the structure that is closer to the subject's torso and the term “distal” refers to the portion of the structure that is further away from the torso. As used herein, the term “subject” refers to a patient who receives vascular treatment using a compression device. According to the present disclosure, the term “therapist” refers to an individual handling a prophylactic sequential compression device and may include support personnel.

  The following description includes a description of the compression treatment system followed by a description of an exemplary method of operating the compression treatment system according to the principles of the present disclosure. Reference will now be made in detail to the exemplary embodiments and disclosure, which are illustrated in the accompanying figures.

  In the figures, like elements are designated by like reference numerals throughout the several views. Reference is first made to FIGS. 1-5 illustrating a compression treatment system 10 constructed in accordance with the principles of the present disclosure. The compression treatment system 10 includes a housing 12. The housing 12 houses components of a controller 14 (shown schematically in FIG. 5) disposed therein.

  The housing 12 has a semi-circular configuration and there is a handle cutout 16 along the apex 18 to facilitate carrying and subject movement. The housing 12 is assumed to have various configurations and dimensions such as a rectangle and a sphere. Furthermore, it is assumed that the housing 12 can be assembled by an appropriate process such as snap fitting, adhesion, solvent welding, heat welding, ultrasonic welding, screws, rivets and the like. In addition, the housing 12 may be integrally molded, or may be integrally assembled by integrating a number of housing sections, and may be substantially transparent, opaque, or the like. The housing 12 may include ribs, ridges, etc. to facilitate operation of the compression treatment system 10.

  The components of the housing 12 can be manufactured from materials suitable for medical applications, such as, for example, polymers or metals such as stainless steel, depending on the particular medical application and / or clinician preference. Production from semi-rigid and rigid polymers as well as molded medical grade polypropylene and other resilient materials is contemplated. However, it will be apparent to those skilled in the art that other materials and manufacturing methods suitable for assembly and production according to the present disclosure may be used.

  The housing 12 is portable so as to facilitate continuous blood vessel treatment for a subject (not shown). The housing 12 includes a bracket 20 that allows the housing 12 to be easily attached to and detached from, for example, a hospital bed or table. The bracket 20 extends from the back portion 22 of the housing 12 and has a hook-type configuration so that the housing 12 is suspended from the subject's bed or the like. It is intended that the bracket 20 can be suspended from a variety of structures from which the housing 12 can be attached and removed, and alternatively, the housing 12 does not include a bracket, but can be a floor or other support surface. You may arrange on top. Further, the housing 12 includes a shoulder strap 24 as shown in FIG. 2 so that the housing 12 can be worn by a subject or a therapist during movement. The shoulder strap 24 can be used with or without the bracket 20 and can be secured to any part of the housing 12 including, for example, the handle 16.

  The compression treatment system 10 utilizes an AC / DC switched power source to operate its components. A power cord 26 is connected to the housing 12 to direct power to the components of the controller 14. The power cord 26 accesses the AC power source through a wall outlet or the like. The controller 14 can include a transformer or other electronic circuit for connecting to a power source. It is envisaged that the power cord 26 may be wound around the bracket 20 for storage and during carrying or movement of the subject. Further, it is envisioned that the compression treatment system 10 may include a retractable storage mechanism that holds the power cord 26 in the housing 12. The retractable storage mechanism may include a resilient cord, pulley, and the like.

  The compression treatment system 10 also utilizes a battery 28 to provide power to the components of the controller 14 to facilitate carrying and subject movement. The battery 28 is disposed in the battery chamber 30 of the housing 12. It is envisioned that the battery 28 can include one or more cells. The battery cell may be a lithium ion type or the like. Furthermore, it is envisioned that the battery 28 may be rechargeable and may be available for various operating time ranges such as 6 hours, 8 hours, 10 hours, and the like. For example, the power cord 26 may be pulled out by being pulled out by a pull-in storage mechanism of the housing 12. Thus, the compression treatment system 10 operates with the electric power of the battery 28, and the subject can walk.

  It is envisioned that battery 28 may be attached to or removed from the outer surface of housing 12. Further, it is envisioned that the compression treatment system 10 may include alternative sources of power, such as, for example, solar cells, non-electricity, or alternatively may not include battery power.

  The housing 12 has a control panel 32 disposed on the front surface 34 thereof. The control panel 32 includes a controller and an indicator for operating the compression treatment system 10. The control panel 32 has an LED display 36 that provides status indications, messages, etc. of various components of the system 10, such as power supply, battery, sleeve identification and connection, inflation, exhaust, venous refill, error, etc. . The control panel 32 also includes a manual switch for supplying power to the system 10. These switches are intended to be membrane-types that operate with finger pressure.

  The rear portion 22 of the housing 12 defines ports 38, 40 (FIG. 4). The ports 38, 40 include output ports 38a, 38b, 38c and output ports 40a, 40b, 40c, respectively. The output ports 38a, 38b, 38c and the output ports 40a, 40b, 40c are connected to an expansion chamber 46a of a compression sleeve 46 configured to fit around the leg of the subject through the engagement of a combination connector 42 and a tube set 44, which will be described later. , 46b, 46c, and the expansion chambers 48a, 48b, 48c of the compression sleeve 48, respectively. The output ports 38a, 38b, 38c, 40a, 40b, 40c are configured to connect to the tube set 44. Each port 38, 40 can be connected to a specific compression sleeve, such as a leg sleeve, a foot sleeve, for example.

  Ports 38 and 40 are also connected to components of controller 14 located within housing 12 to facilitate inflating selected compression sleeves as described in the pneumatic circuit shown in FIG. The controller 14 includes a source of pressurized fluid, such as a pump 50 in fluid communication with a valve manifold 52 for connection to ports 38, 40, as described below. The pump 50 includes a motor that compresses air to the valve manifold 52 via a tube or the like. The speed of the pump motor is electronically controlled to provide a compressor speed corresponding to the desired pressure for each output. A power supply board, including the necessary electronic circuits, circuit configurations, software, etc., well known to those skilled in the art, is intended to be connected to the pump motor and other components of the controller 14 to regulate power to them. The It is envisioned that the pump 50 may be a diaphragm pump.

  The controller 14 includes a check valve 54 that prevents backflow of air through the pump 50 when monitoring the pressure of the bladder during venous refill detection, as described below. A pressure relief valve 56 is disposed in the pneumatic circuit and protects against excessive pressure on the compression sleeve. The pressure relief valve 56 is configured to discharge excessive air pressure as necessary. For example, it is contemplated that various valves such as spring loaded plunger valves can be utilized.

  The valve manifold 52 includes solenoid valves 58a, 58b, 58c, 60a, 60b, 60c that couple to the output ports 38a, 38b, 38c, 40a, 40b, 40c, respectively. Each solenoid valve 58a, 58b, 58c, 60a, 60b, 60c has an associated solenoid that is electrically driven via the control processor of the controller 14. The solenoid is coupled to the valve seat of each particular solenoid valve 58a, 58b, 58c, 60a, 60b, 60c so that when the solenoid is actuated, the seat operates to open and close the individual solenoid valves. See, for example, the solenoid valve described in Bock et al., US Pat. No. 5,876,359, which is incorporated herein by reference in its entirety. The control processor of the controller 14 includes solenoid valves 58a, 58b, 58c, 60a, 60b, 60c depending on the wide variety of conditions of the compression treatment system 10, other instructions, and measurements sensed by components of the controller 14. It is intended that necessary electronic circuits, circuit configurations, software, and the like well known to those skilled in the art to be included. It is also envisioned that one or more solenoid valves can be utilized, and other types of valves may alternatively be used.

  Solenoid valves 58a, 58b, 58c, 60a, 60b, 60c and their associated valve components are attached to ports 38, 40 in housing 12. Solenoid valves 58a, 58b, 58c, 60a, 60b, and 60c are normally closed valves with three circuits and two contacts, each having an opening 62a, 62b, 62c, 64a, 64b, and 64c. In the open position, air flows through the openings 62a, 62b, 62c, 64a, 64b, 64c to the associated output ports 38a, 38b, 38c, 40a, 40b, 40c, and the expansion chamber 46a, 46b, 46c and compression sleeve 48 into expansion chambers 48a, 48b, 48c. In the closed position, the openings 62a, 62b, 62c, 64a, 64b, 64c are blocked and the air from the compression sleeves 46, 48 passes through the output ports 38a, 38b, 38c, 40a, 40b, 40c and is associated with Backflow through the valve exhaust ports 66a, 66b, 66c, 68a, 68b, 68c causes the expansion chambers 46a, 46b, 46c, 48a, 48b, 48c to contract.

  The solenoid valves 58a, 58b, 58c, 60a, 60b, 60c operate in sequence to pressurize the expansion chambers 46a, 46b, 46c, 48a, 48b, 48c under the control processor of the controller 14, and the sequential application thereof. Provides pressure and chamber exhaust. It is envisioned that the solenoid valves 58a, 58b, 58c, 60a, 60b, 60c are selectively operable when a sleeve cooling operation is desired. See Bock et al., US Pat. No. 5,876,359.

  The solenoid valves 58a, 58b, 58c, 60a, 60b, and 60c are driven by a pulse width modulation signal provided by the control processor of the controller 14. The solenoid drive signal is initially at a high power level in order to operate the solenoid valve quickly and actively. After the start operation, the drive signal can be reduced to, for example, about 70% to maintain the valve operation, thereby reducing power consumption. The solenoid valves 58a, 58b, 58c, 60a, 60b, 60c may be stopped as desired. Furthermore, the control processor of the controller 14 may include the ability to verify the status of the solenoid valves 58a, 58b, 58c, 60a, 60b, 60c. When the state of the solenoid valves 58a, 58b, 58c, 60a, 60b, 60c changes, the control processor verifies that state. For example, if a specific valve short circuit or exhaust is detected, the compression treatment system 10 enters a specific error mode as described below.

  The controller 14 also includes a pressure transducer 66 disposed within the housing 12. The pressure transducer 66 is coupled to a pneumatic circuit, and is disposed between the pump 50 and the solenoid valves 58a, 58b, 58c, 60a, 60b, 60c via a tube or the like. The pressure transducer 66 is in fluid communication with the expansion chambers 46a, 46b, 46c, 48a, 48b, 48c to monitor the pressure for each expansion chamber 46a, 46b, 46c, 48a, 48b, 48c. The control processor of the controller 14 directs the pressure transducer 66 to measure any of the expansion chambers 46a, 46b, 46c, 48a, 48b, 48c that are in fluid communication by being connected to their respective solenoid valves. Let Placing the pressure transducer 66 in front of the solenoid valve on the manifold side of the pneumatic circuit has the advantage that only a single pressure transducer is required to measure the pressure in the expansion chamber. This configuration facilitates expansion of one or more expansion chambers. This configuration also has the advantage of contributing to the compact and lightweight design of the compression treatment system 10 so that the controller 14 is not bulky, making it easier for the carryer and patient to move and reducing manufacturing costs.

  For example, during a selected compression cycle, solenoid valves 58a, 58b, 58c, 60a, 60b, 60c are sequentially energized to sequentially pressurize expansion chambers 46a, 46b, 46c, 48a, 48b, 48c. Open position. In this open position, solenoid valves 58a, 58b, 58c, 60a, 60b, 60c allow air from pump 50 to pass through the respective output ports 38a, 38b, 38c, 40a, 40b, 40c to the expansion chamber. The pressure transducer 66 monitors the pressure in the pneumatic circuit for each of the expansion chambers 46a, 46b, 46c, 48a, 48b, 48c and provides an electrical signal input to the control processor of the controller 14 for feedback control.

  At the end of the selected compression cycle, the solenoid valves 58a, 58b, 58c, 60a, 60b, 60c are simultaneously shut down to the closed position to disconnect the pump 50 from the sleeves 46,48. In the closed position, the air of the pump 50 is shut off and the solenoid valves 58a, 58b, 58c, 60a, 60b, 60c are connected to the sleeve pressure via the exhaust ports 66a, 66b, 66c, 68a, 68b, 68c of the valve manifold 52. To atmospheric pressure. The compression treatment system 10 can alternately inflate the chamber between the first limb and the second limb. Further, the compression treatment system 10 can inflate each bladder individually.

  Referring to FIG. 6, a compression treatment system 10 similar to that described above is assembled and packaged for use. In use, the compression treatment system 10 includes a controller 14 and a sleeve disposed on the housing 12 as described above. The sleeve 112 includes a thigh bladder 114, a calf bladder 116, and an ankle bladder 118. The sleeve 112 includes a connector 120 that mates with a mating connector 42 that connects to the port 38 via a tube. The connector 120 is in fluid communication with the chamber of the sleeve 112 via the tube set 122. Accordingly, this configuration facilitates fluid communication between the bladders 114, 116, 118 and the pump 50. It is also contemplated that the connector 120 further includes a valve mechanism that controls fluid flow.

  The sleeve 112 is provided and operated so as to be arranged around the leg L of the subject (not shown). The connector 120 is mated with the mating connector 42 to establish fluid communication between the sleeve 112 and the pneumatic circuit. The sleeve 112 is wound around the leg L and fastened to the leg via hook loop pads (magic tape (registered trademark)) 124 and 126. It is contemplated that the compression treatment system 10 can treat a subject's second leg with a compression sleeve similar to the sleeve 112 via a connection to the port 40. The second leg is alternatively treated with a compression cycle alternating with the following compression cycle for treatment of leg L, as described below.

  The portable functions of the housing 12 and controller 14 described above provide a compression treatment system 10 that facilitates carrying and patient movement. This highly advantageous configuration provides DVT prevention without interruption wherever the system is used in the treatment facility, so that the patient can be worn and used continuously throughout the risk period. The compression treatment system 10 has the advantage that continuous vascular therapy is facilitated even during patient activities and task execution, such as transport for examination, bathing, physical therapy, and the like. The compression treatment system 10 provides a controller 14 that operates on a battery 28 even when the power cord 26 is not plugged into the outlet, thereby preventing treatment interruption and being comfortable, small, and lightweight so it can move with the patient as needed it can.

  The power is turned on by a manual switch on the control panel 32 of the controller 14 to turn on the compression treatment system 10. When the compression treatment system 10 is first switched on, a series of self tests are performed by the control processor of the controller 14. The LED indicator on the display 36 lights up, an audible instruction sounds, and the operation of the indicator is verified visually and audibly. The display 36 lights up and the display operation is verified. The controller 14 also verifies the software operation of the control processor. If any verification fails, the error code provides an audible and / or visual indication that represents it.

  It is intended that an error code be generated if the control processor of the controller 14 cannot continue normal software execution. Thereby, the compression treatment system 10 is reset and normal operation is resumed. The sleeve 112 will be evacuated during the restart procedure. Auditory and visual instructions may be combined to represent the situation.

  When the self-test sequential compression on the treatment system 10 is complete, the controller 14 initiates a sleeve detection procedure to determine the type of sleeve attached to the ports 38,40. Sleeve detection is performed during the first expansion (detection) cycle after the controller 14 is first turned on. During the detection cycle, air is alternately delivered through ports 38, 40 by pump 50 operating for 2 seconds or until pressure reaches a predetermined threshold. After 1 second, pressure transducer 66 measures the pressure and determines whether the bladder is connected to a particular output port 38a, 38b, 38c, 40a, 40b, or 40c based on sleeve detection.

  For example, the detection procedure is performed for bladders 114, 116, 118 for sleeve ports 38, 40, respectively. If no back pressure is applied to the specific outlet port connected to the bladder, the control processor of the controller 14 determines that no bladder is used for the specific outlet port. The control processor adjusts the compression treatment for the detected sleeve configuration accordingly. When connected to the controller 14, back pressure is detected by the bladders 114, 116, 118 in the 3- bladder sleeve. In this procedure, if a sleeve is not detected at either port 38 or 40, or if the detected configuration is not recognized, a low pressure error is intended to be generated with a corresponding audible indication. It is further contemplated that various timing periods can be utilized to detect inflation and pressure measurements according to the requirements of a particular application.

  Alternatively, the thigh bladder 114 is removed from the calf bladder 116. For example, the calf bladder 116 is detachably connected to the thigh bladder 114 via a perforated attachment. For example, a sleeve described in US patent application Ser. No. 10 / 784,607, filed Feb. 23, 2004, entitled “Compression Device”, incorporated herein by reference in its entirety. See For the removable thigh bladder 114, the control processor of the controller 14 performs a sleeve detection procedure similar to that described above. The control processor detects the 3-bladder sleeve by a flow restriction valve (not shown) fixed to the connector 120. For example, the flow restriction valve described in US patent application Ser. No. 10 / 784,639, filed Feb. 23, 2004, entitled “Fluid Conduit Connector Device”, filed February 23, 2004, which is incorporated herein by reference in its entirety See The flow restriction valve simulates the back pressure created by the thigh bladder 114 when the connected bladder is not actually present. Thus, switching from a 3-bladder thigh length sleeve to a 2-bladder knee length sleeve does not have a significant impact on the compression parameters, and the controller 14 may Continue vascular treatment as if 114 is still present.

  In an alternative embodiment, as shown in FIG. 7, the sleeve 112 includes a thigh bladder 114 and an integral second bladder 218. Second bladder 218 has a calf portion 220 and an ankle portion 222. The pump 50 is connected to the sleeve 112 and fluid via the valve connector 224 and separate tubes 226, 228 to utilize similar ones as described above, including optional removal of the femoral bladder 114, such as by drilling. Communicate.

In one specific compression cycle for the compression treatment system 10, the compression parameters include an 11 second inflation period for the inflation bladders 114, 116, 118 followed by a 60 second exhaust for the deflation bladders 114, 116, 118. The 11 second expansion period is sequential.
1) Initially the ankle bladder 118 inflates during the first time period starting at 0 seconds.
2) Thereafter and during the first time period, inflation of the calf bladder 116 begins during the second time period. The start of the second time period coincides with the passage of about 2.67 seconds of the first time period.
3) Thereafter and during the second time period, inflation of the thigh bladder 114 begins during the third time period. The start of the third time period is about 3.0 seconds after the second time period and about 5.67 seconds after the first time period.
4) After a first time period of 11 seconds, bladders 114, 116, 118 are evacuated for a minimum of 20 seconds and a maximum of 60 seconds. Examples are shown in Table 1 below.

  The exhaust time period is intended to measure from the end of one expansion cycle applied to leg L to the start of the next expansion cycle. It is further contemplated that both limbs of the subject are treated and the compression treatment system 10 provides vascular therapy alternately from leg L to the second leg. The time from the end of the expansion cycle for the leg L to the start of the expansion cycle for the second leg can be, for example, in the range of 4.5 to 24.5 seconds.

  During the first expansion cycle to treat leg L as described above, pump 50 starts at a predetermined low voltage so that bladders 114, 116, 118 are not over-inflated in the first cycle. Solenoid valves 58a, 58b, and 58c are applied to the open position as described above, thereby opening the valve to the ankle bladder 118 of the sleeve 112, then the calf bladder 116, and then the thigh bladder 114. Deliver air according to the desired cycle timing sequence. The pressure transducer 66 monitors the pressure of each of the bladders 114, 116, 118 over the entire 11 second compression cycle. When the expansion cycle is completed, the pump 50 is stopped, the energization of the solenoid valves 58a, 58b, 58c is cut off to the closed position, and the bladders 114, 116, 118 contract through the exhaust ports 66a, 66b, 66c.

  When vascular therapy is performed on the subject's second leg, solenoid valves 60a, 60b, 60c are applied as described above to the open position, thereby opening the valve and resembling sleeve 112. Air is delivered using a desired cycle timing sequence to the corresponding bladder of the sleeve placed around. The pressure transducer 66 monitors the respective pressure of the corresponding bladder over the entire 11 second compression cycle. At the completion of the expansion cycle, the pump 50 is stopped, the energization of the solenoid valves 60a, 60b, 60c is cut off to the closed position, and the corresponding bladder is contracted through the exhaust ports 68a, 68b, 68c. Further, it is contemplated that the inflation cycle for the second leg treatment may begin at about 24.5 seconds after completion of the inflation cycle for the leg L treatment. This process can be repeated for cycles associated with both legs. In addition to this, other cycle times are assumed.

In the present embodiment, during the inflation cycle, the pressure of the bladders 114, 116, 118 and the corresponding signals measured by the pressure transducer 66 and relayed to the control processor of the controller 14 remain tilted. The pressure in the ankle bladder 118 is higher than the pressure in the calf bladder 116, and the pressure in the calf bladder 116 is higher than the pressure in the thigh bladder 114. The end-of-cycle pressure includes, for example, 45 mm Hg for ankle bladder 118, 40 mm Hg for calf bladder 116, and 30 mm Hg for thigh bladder 114. Examples are shown in Table 2 below. It is contemplated that compression will continue in this cycle pattern until the compression treatment system 10 is turned off or the controller 14 indicates an error code by audible or visual indication. Other cycle pressures are also envisioned.

In the expansion cycle following the first expansion cycle for the described leg L, the pressure feedback adjustment can be made according to the pressure measurement obtained by the pressure transducer 66. At the completion of the first inflation cycle for leg L, the last pressure of the ankle bladder 118 cycle is measured by pressure transducer 66 and compared to a set pressure of 45 mmHg by the control processor of controller 14. If the pressure in the ankle bladder 118 is higher or lower than the set pressure, a corresponding increase or decrease in the number of revolutions of the pump 50 is requested to increase or decrease the pressure delivery. The pump speed adjustment is based on the following calculation:
Adjustment = | 45−P |, where P = pressure at the ankle

  If the pressure is less than the set pressure, the pump speed of the next cycle is increased by an adjustment amount. When the pressure is higher than the set pressure, the pump speed of the next cycle is decreased by an adjustment amount. The adjustment process is intended to continue after reaching the set pressure range. It is further contemplated that the compression treatment system 10 can be adjusted to a separate pump speed for each sleeve connected to the controller 14. Other sequential compression cycles are also contemplated.

  In an alternative embodiment, compression treatment system 10 performs a venous refill time measurement. Venous refill time (VRT) measurement is an air plethysmo technique that determines the time at which a vein of a limb has completely refilled with blood after compression. See, for example, venous refill time measurement as described in Watson et al., US Pat. No. 6,231,352, which is incorporated herein by reference in its entirety. VRT minimizes the amount of time that blood stays inside the vein. See, for example, venous refill time measurement as described in Watson et al., US Pat. No. 6,231,352, which is incorporated herein by reference in its entirety. The VRT is replaced instead of the default pause time (60 seconds) as long as the VRT is between 20 and 60 seconds. If VRT is less than 20 seconds, the default value of 20 seconds is used. When VRT exceeds 60 seconds, the maximum value of 60 seconds is used. The VRT measurement is performed when the system first reaches the set pressure and then once every 30 minutes. It is contemplated that VRT techniques and algorithms can be used for both sleeve and foot compression.

  VRT measurements use an air plethysmo technique when low pressure is applied to the calf bladder. As the vein fills with blood, the pressure in the calf bladder increases until a steady state is reached. The time when the pressure reaches a steady state is VRT. If two sleeves are connected to the controller 14, the VRT is determined separately for each limb being compressed and the larger of the two measurements is used as the new exhaust time for the compression cycle. The VRT measurement for each sleeve is performed independently when each particular sleeve reaches the set pressure. However, the exhaust time does not update until VRT measurements are calculated for both sleeves.

  For example, the compression treatment system 10 can utilize VRT measurements after the system begins vascular therapy. Subsequently, after 30 minutes, the VRT measurement is performed on the next full expansion cycle. After any of the above sleeves are inflated, the bladder of the particular sleeve is evacuated and reduced to zero in a predetermined expansion cycle.

  The pressure of the selected bladder is monitored and the bladder exhaust is intended to be closed when the pressure drops to 5-7 mm Hg. When the bladder pressure reaches 5-7 mmHg in the current cycle, VRT measurement is performed. If the bladder pressure does not drop after evacuating to 5-7 mmHg, leave the evacuation time at the current value and take another measurement within 30 minutes. When an error occurs, a corresponding warning is provided audibly and / or visually.

  The VRT measurement algorithm determines the time during which the pressure in the selected bladder is in a steady state after compression. VRT is determined separately for both legs. The longer of the two refill times is used as the new exhaust time. If compression is applied to only one leg, the VRT for that leg is used as the new exhaust time. The VRT measurement algorithm is initiated by a time counter that starts at the end of the expansion cycle that occurs after the exhaust stops, when the selected bladder reaches 5-7 mmHg (sufficient pressure to keep the bladder in contact with the leg surface). . The VRT measurement is started by a time counter that starts from the end of the expansion cycle.

  The pressure in the selected bladder is then monitored. By way of example only, the pressure is monitored by a 10 second moving sample window. The window moves at 1 second intervals. If the difference between the first and last value in the window is less than about 0.3 mmHg, the curve has reached a steady state. The VRT measurement is considered complete and the time interval is determined. The end of the window is considered to be when the venous system in the limb has refilled.

  With independent VRT measurements, selected bladders can be evacuated for at least 15 seconds before the next compression cycle in the same limb begins. As a safety factor, add 5 seconds to the measured refill time so that the limbs are not compressed too quickly. The intention is that the exhaust time is equal to the measured refill time + 5 seconds. For example, as a result of the patient's exercise, the standard deviation in the sample window may be too high resulting in a measurement error. In this case, the calculation is discarded and the old value of VRT is used. If at any time during the measurement, the pressure of the selected bladder is less than 2 mmHg, the VRT measurement is considered an error, the calculation is discarded, and the old value of VRT is used. This can happen if there is a leak in the system. It is also contemplated that the old value of VRT is used if the pressure exceeds 20 mmHg at any time during the VRT measurement. Furthermore, when the VRT calculation is performed on both legs, it is also intended to use the VRT with the longer of both legs. If the VRT is calculated to be longer than 60 seconds, it is also assumed that a value of 60 seconds is used. If VRT is calculated to be less than 20 seconds, a value of 20 seconds is used.

  Alternatively, the compression treatment system 10 utilizes one, multiple, or all of the following error codes to provide an audible and / or visual indication of a system error or defect. These features have the advantage of enhancing safety to the subject during vascular treatment. In some error situations, the compression treatment system 10 may alert and stop a particular compression cycle. The compression treatment system 10 is intended to flash an error indicator, sound a continuous signal, etc. to cause the user to reset the compression treatment system 10. The controller 14 may provide error warnings for one, more than one, or all of the following error situations. That is, a high pressure error including a pressure detected exceeding a set pressure; a pressure detected below the set pressure, and a low pressure error including a case where no sleeve is detected; an expansion cycle that deviates from a desired parameter within the expansion cycle System pressure error including pressure determined within; valve error; software error; pump error; exhaust and contraction error; battery error; and temperature error including temperature detected to be outside specified environmental conditions.

  In an alternative embodiment, as shown in FIG. 8, a compression treatment system 10 similar to that described above includes a foot sleeve 312 configured to provide vascular therapy to the subject's leg. The foot sleeve 312 includes a bladder 314 that is inflated with air to provide pressure application to the foot and then contracts. See, for example, the sleeve described in US patent application Ser. No. 10 / 784,604, filed Feb. 23, 2004, entitled “Compression Device”, which is incorporated herein by reference in its entirety.

  Pump 50 is in fluid communication with foot sleeve 312. The sleeve 312 includes a connector 316 that mates with the combination connector 42 that is connected to the port 40 via the tube 44. Valve connector 316 is in fluid communication with bladder 314 of sleeve 312 via tube 318. Therefore, this configuration facilitates fluid communication between the bladder 314 and the pump 50. The foot sleeve 312 wraps around the side portion of the foot via a hook loop fastener flap 320 that crosses the instep and an ankle strap 322 of the hook loop fastener.

  When the treatment system 10 has been subjected to the same self-test sequential compression as described above, the controller 14 initiates a sleeve detection procedure to determine the type of sleeve attached to the ports 38,40. For the foot sleeve 312, the control processor of the controller 14 detects the back pressure corresponding to the bladder 314 connecting to the outlet port 40b. It is contemplated that the compression treatment system 10 may treat the leg of the subject's second leg with the foot sleeve 312 in an alternating inflation cycle and treat the leg L as well, as described above.

In one particular exemplary compression cycle for leg sleeve 312, the compression parameters include 5 seconds of inflation time followed by 60 seconds of exhaust. Examples are shown in Table 3 below.

  The intent is that the evacuation time is measured from the end of one inflation cycle applied to the subject's foot until the beginning of the next inflation cycle. Furthermore, it is also intended that both limbs of the subject are treated and the compression treatment system 10 alternately provides vascular therapy from the leg L to the second leg. Further, it is assumed that the time from the end of the expansion cycle of the leg L to the start of the expansion cycle of the second leg can be in the range of 7.5 to 27.5 seconds.

  During the first inflation cycle to treat the subject's foot, the pump 50 begins at a predetermined low voltage so as not to overinflate the bladder 314 in the first cycle as described above. Solenoid valve 60b is opened as voltage is applied as described above, thereby opening the valve and delivering air to bladder 314 using the desired cycle timing sequence. The pressure transducer 66 monitors the pressure of the bladder 314 over the entire 5 second compression cycle. When the expansion cycle is completed, the pump 50 is stopped, the solenoid valve 60b is deenergized to the closed position, and the bladder 314 contracts through the exhaust port 68b.

  When applying vascular therapy to the subject's second leg, the solenoid valve 58b is energized as described above to the open position, thereby opening the valve and, like the leg sleeve 312, the other leg circumferences. Air is delivered to the corresponding bladder of the sleeve placed in the desired cycle timing sequence. For example, the pressure transducer 66 monitors the corresponding bladder pressure over the entire 5 second compression cycle. At the completion of the expansion cycle, the pump 50 is stopped, the solenoid valve 58b is deenergized to the closed position, and the corresponding bladder contracts through the exhaust port 66b. Further, it is envisioned that the second foot treatment inflation cycle may begin at approximately 27.5 seconds after completion of the inflation cycle for treating the foot treated by foot sleeve 312. This process can be repeated with a cycle suitable for both feet, or alternatively for the first leg leg sleeve and the second leg leg sleeve. The intent is that the compression treatment system 10 can provide alternating compression for any combination of sleeve and foot cover, and when utilizing such a combination, for example, an additional exhaust timing 6 second buffer, Add to all exhaust times after the expansion cycle. Thereby, the overall timing remains consistent with the predetermined sleeve compression parameters. Other cycle times are possible.

  In the present embodiment, the target pressure of bladder 314 for the pressure measured by pressure transducer 66 and the corresponding signal relayed to the control processor of controller 14 is, for example, 130 mmHg. The intent is that compression continues in this cycle pattern until the compression treatment system 10 is turned off or the controller 14 indicates an error code by audible or visual indication.

In the expansion cycle following the first expansion cycle for the foot sleeve 312 described above, pressure feedback adjustment can be made in accordance with the pressure measurement obtained by the pressure transducer 66. At the completion of the first inflation cycle for the foot sleeve 312, the pressure at the end of the cycle of the bladder 314 is measured by the pressure transducer 66 and compared to a set pressure of 130 mmHg by the control processor of the controller 14. If the pressure in the ankle bladder 314 is higher or lower than the set pressure, a corresponding increase or decrease in the number of revolutions of the pump 50 is requested to increase or decrease pressure delivery. The pump speed adjustment is based on the following calculation:
Adjustment = | 130-P |, where P = foot pressure

  If the pressure is less than the set pressure, the pump speed of the next cycle is increased by an adjustment amount. When the pressure is higher than the set pressure, the pump speed of the next cycle is decreased by an adjustment amount. The intent is that the adjustment process continues after reaching the set pressure range. A further intent is that the compression treatment system 10 can be adjusted to a separate pump speed for each sleeve connected to the controller 14. Other sequential compression cycles are also conceivable.

  Needless to say, various modifications can be made to the embodiments disclosed herein. Therefore, the above description should not be construed as limiting, but merely as exemplifications of various embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the claims appended hereto.

The objects and features of the disclosure believed to be novel are set forth with particularity in the appended claims. The present disclosure, both in terms of operation schemes and techniques in conjunction with further objects and advantages, may be best understood by reference to the following description, taken in conjunction with the accompanying drawings, described below.
FIG. 1 is a front view of one particular embodiment of a compression treatment system according to the principles of the present disclosure. FIG. 2 is a side view of the compression treatment system shown in FIG. FIG. 3 is a top view of the compression treatment system shown in FIG. 4 is a rear view of the compression treatment system shown in FIG. FIG. 5 is a schematic diagram of a pneumatic circuit of the compression treatment system shown in FIG. FIG. 6 is a plan view of a sleeve arranged around the extremities of the compression treatment system shown in FIG. 1. FIG. 7 is an alternative embodiment of the sleeve shown in FIG. FIG. 8 is another alternative embodiment of the sleeve shown in FIG.

Claims (20)

Compression treatment system:
A first bladder supported around the limbs;
A second bladder supported around the limbs, wherein both bladders are in fluid communication with a fluid source, wherein both bladders are inflated by the first bladder for a first time period and the second bladder is for a second time period. Inflated to expand for a period of time, and the second time period begins within the first time period; and
A pneumatic circuit spaced apart from the inflatable bladder, the pneumatic circuit including a controller, a single pressure sensor, a single check valve, a fluid source and a plurality of solenoid valves;
The plurality of solenoid valves are disposed between the first bladder and the fluid source and between the second bladder and the fluid source;
It said single check valve located between the operably connected to the fluid source and the plurality of solenoid valves to the fluid source, said single check valve prevents backflow of air,
The single pressure sensor is located between the fluid source and the solenoid valve and communicates with the first bladder and the second bladder, and the single pressure sensor is a vein refill time in the first bladder. Measuring the pressure of the first bladder downstream of the check valve as viewed from the fluid source . Said controller communicates with said fluid source and the pressure sensor under pressure, wherein the controller, by the pressure of the bladder in communication with the fluid source said pressure sensor for monitoring, said communication with said fluid source bladder Configured to adjust the pressure of the
The compression treatment system according to claim 1. The controller is disposed in a portable housing;
The compression treatment system according to claim 1. The housing includes a plurality of ports connectable to a plurality of bladders;
The compression treatment system according to claim 1. The pressure sensor monitors the pressure for each of the plurality of ports, determines whether a bladder is connected to the port based on whether back pressure is applied to the port, and signals to the controller Send,
The compression treatment system according to claim 4. The controller includes separate solenoid valves that respectively adjust the expansion of the plurality of bladders;
The compression treatment system according to claim 2. The pressure sensor is configured to monitor the pressure of the black da in communication with the fluid source,
The compression treatment system according to claim 1. A foot bladder in communication with the pressure sensor;
The compression treatment system according to claim 1. Compression treatment system:
A first bladder supported around the limbs;
A second bladder supported around the limbs, wherein the first and second bladders are in fluid communication with a fluid source, the first and second bladders wherein the first bladder is inflated for a first time period; The second bladder expands such that it expands for a second time period, the second time period starting within the first time period;
A third bladder supported around the foot, wherein the third bladder is in fluid communication with the fluid source;
A pneumatic circuit disposed separately from the inflatable bladder, the pneumatic circuit including a controller, a single pressure sensor, a single check valve, a fluid source and a plurality of solenoid valves;
The plurality of solenoid valves are disposed between the first bladder and the fluid source, between the second bladder and the fluid source, and between the third bladder and the fluid source,
The single check valve is operatively connected to the fluid source and located between the fluid source and the plurality of solenoid valves; the single check valve prevents backflow of air;
The single pressure sensor is located between the fluid source and the solenoid valve and communicates with the plurality of bladders, the single pressure sensor for calculating the venous refill time in the bladder being measured. Measuring the pressure of the bladder to be measured downstream of the check valve as viewed from the fluid source ;
Pressure treatment system comprising: The pressurized fluid source alternately inflates the bladder placed around the limbs and the bladder placed around the legs;
The compression treatment system according to claim 9. Said controller communicates with said fluid source and said single pressure sensor pressurized, the controller communicates the pressure of the bladder in communication with the fluid source by the pressure sensor monitors, the fluid source Configured to regulate the pressure of the bladder
The compression treatment system according to claim 9. The controller is disposed in a portable housing;
The compression treatment system according to claim 10. The controller includes separate solenoid valves that respectively adjust the expansion of the bladder;
The compression treatment system according to claim 10. Wherein the single pressure sensor is configured to monitor the pressure of the black da in communication with the fluid source,
The compression treatment system according to claim 9. Compression treatment system:
A first plurality of bladders supported around the first limb;
A second plurality of bladders supported about a second limb, wherein the bladders are in fluid communication with a fluid source, the bladders:
The first bladder of the first plurality of bladders expands for a first time period, the second bladder of the first plurality of bladders expands for a second time period, and the second time period is within the first time period. Started on;
The first bladder of the second plurality of bladders expands for a third time period, the second bladder of the second plurality of bladders expands for a fourth time period, and the fourth time period is within the third time period. Started on;
A pneumatic circuit spaced apart from the inflatable bladder, the pneumatic circuit including a controller, a single pressure sensor, a single check valve, a fluid source and a plurality of solenoid valves;
The plurality of solenoid valves are disposed between the first bladder of the first plurality of bladders and the fluid source, between the second bladder of the first plurality of bladders and the fluid source, and Between the first bladder of the plurality of bladders and the fluid source and between the second bladder of the second plurality of bladders and the fluid source;
The single check valve is operatively connected to the fluid source and located between the fluid source and the plurality of solenoid valves, the single check valve prevents backflow of air;
The single pressure sensor is located between the fluid source and the solenoid valve and communicates with the plurality of bladders, the single pressure sensor for calculating the venous refill time in the bladder being measured. Measuring the pressure of the bladder to be measured downstream of the check valve as viewed from the fluid source ;
Pressure treatment system comprising: Wherein the controller is arranged to portable housing, said fluid source under pressure and communicating with said pressure sensor, by the pressure of the bladder in communication with the fluid source said pressure sensor for monitoring, communicating with said fluid source Configured to regulate the pressure of the bladder
The compression treatment system according to claim 15. The pressurized fluid source alternately inflates the bladder placed around the first limb and the bladder placed around the second limb;
The compression treatment system according to claim 15. Compression treatment system:
A first plurality of bladders supported around the first limb and a second plurality of bladders supported around the second limb;
Each bladder of the first plurality of bladders and the second plurality of bladders has a separate valve in communication therewith, wherein the valve is in fluid communication with a fluid source, and the bladder is:
The first valve is opened so that the first bladder of the first plurality of bladders expands for a first time period, and the second valve is expanded so that the second bladder of the first plurality of bladders expands for a second time period. Open, the second time period begins within the first time period, the third valve opens so that the third bladder of the first plurality of bladders expands for a third time period, and the third time period Starting within the second time period; and
The fourth valve is opened so that the first bladder of the second plurality of bladders expands for a fourth time period, and the fifth valve is expanded so that the second bladder of the second plurality of bladders expands for a fifth time period. Open, the fifth time period begins within the fourth time period, the sixth valve opens so that the sixth bladder of the second plurality of bladders expands for the sixth time period, and the sixth time period Begins within the fifth time period;
A pneumatic circuit spaced apart from the inflatable bladder, the pneumatic circuit including a controller, a single pressure sensor, a single check valve, a fluid source and a plurality of the valves ;
Said controller communicates with said fluid source and the pressure sensor under pressure, as the controller by monitoring the previous SL pressure sensor the pressure of the bladder to adjust the pressure of the bladder in communication with the fluid source Configured,
The single check valve is operably connected to the fluid source and located between the fluid source and the valve , the single check valve prevents backflow;
The single pressure sensor is located between the fluid source and the valve and communicates with the plurality of bladders, the single pressure sensor for calculating the venous refill time in the bladder being measured. Measuring the pressure of the bladder to be measured downstream of the check valve as viewed from the fluid source ;
Pressure treatment system comprising: The check valve is operated based on a pressure difference between an upstream pressure and a downstream pressure of the check valve ;
The compression treatment system according to claim 1, 9, 15, 18. Bladder of the measurement target, the first plurality of first bladder of bladder, the first plurality of black da of the second bladder, the second plurality of first bladder and said second plurality of bladder 16. The compression treatment system of claim 15, selected from the group consisting of a second bladder of bladders.

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