US20120053541A1 - Negative pressure wound therapy system and a feedback control method for the same - Google Patents
Negative pressure wound therapy system and a feedback control method for the same Download PDFInfo
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- US20120053541A1 US20120053541A1 US12/872,973 US87297310A US2012053541A1 US 20120053541 A1 US20120053541 A1 US 20120053541A1 US 87297310 A US87297310 A US 87297310A US 2012053541 A1 US2012053541 A1 US 2012053541A1
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- negative pressure
- positive pressure
- wound
- fluid
- detecting
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/71—Suction drainage systems
- A61M1/74—Suction control
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/71—Suction drainage systems
- A61M1/79—Filters for solid matter
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
- A61M1/96—Suction control thereof
- A61M1/962—Suction control thereof having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
- A61M1/96—Suction control thereof
- A61M1/966—Suction control thereof having a pressure sensor on or near the dressing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/80—Suction pumps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
- A61M1/91—Suction aspects of the dressing
- A61M1/915—Constructional details of the pressure distribution manifold
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
- A61M2205/3344—Measuring or controlling pressure at the body treatment site
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
- A61M2205/3351—Controlling upstream pump pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
- A61M2205/3355—Controlling downstream pump pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/75—General characteristics of the apparatus with filters
- A61M2205/7545—General characteristics of the apparatus with filters for solid matter, e.g. microaggregates
Definitions
- the present invention relates to a negative pressure wound therapy system and a feedback control method for the same, especially to a therapy system creating negative pressure in the wound environment to promote healing in wounds.
- Negative pressure wound therapy utilizes wound sheets, soft suction pads, or biocompatibility pore materials to attach on the wounds and connects to a vacuum pump.
- the vacuum pump creates negative pressure in the wound to extract the pus and infection subjects and to draw the healthy tissue fluid so that a moist therapy environment is maintained. Therefore, the blood circulation around the wound is promoted to accelerate wound healing.
- One of the conventional negative pressure wound therapy systems has a rigid collector connecting to a front end of the vacuum pump to extract the pus and the infection subjects into the rigid collector.
- a negative pressure sensor detects the negative pressure in the collector to determine whether the traditional system is operated normally.
- the vacuum pump is connected to the rear end of the rigid collector, the pump is further from the wound so that the pump needs more power to create negative pressure in the wound and to extract the pus and the infection subjects from the wound.
- the collector is connected to the rear end of the vacuum pump.
- the vacuum pump is directly connected to the wound sheet attached on the wound so that the vacuum pump uses less power.
- the collector does not have the same negative pressure environment as the wound. Therefore, the negative pressure sensor is not useful to detect.
- the present invention provides a negative pressure wound therapy system and a feedback control method for the same to mitigate or obviate the aforementioned problems.
- the main objective of the present invention is to provide a negative pressure wound therapy system and a feedback control method for the same.
- the system creates a negative pressure environment in the opening of a wound-dressing unit and a positive pressure environment in the collecting bag. Then a positive pressure detecting procedure is proceeded in the positive pressure environment and a negative pressure detecting procedure is proceeded in the negative pressure environment. The detecting results are sent to determine whether a micro pump is stopped.
- FIG. 1 is a perspective view of a negative pressure wound therapy system in accordance with the present invention
- FIG. 2 is a block diagram shown the connection of the negative pressure wound therapy system in FIG. 1 ;
- FIG. 3 is a perspective view of a wound-dressing unit of the negative pressure wound therapy system
- FIG. 4 is an exploded perspective view of the negative pressure wound therapy system in FIG. 1 ;
- FIG. 5 is an exploded perspective view of a sensor assembly and an actuator of the negative pressure wound therapy system in FIG. 1 ;
- FIG. 6 is a partial perspective view of the actuator of the negative pressure wound therapy system in FIG. 1 ;
- FIG. 7 is a flow chart shown test mode of a feedback control method in accordance with the present invention for the negative pressure wound therapy system in FIG. 1 ;
- FIG. 8 is a flow chart shown operating mode of the feedback control method for the negative pressure wound therapy system in FIG. 1 .
- a negative pressure wound therapy system in accordance with the present invention comprises a controller 10 , a sensor assembly 20 , an actuator 30 , a collector 40 and a wound-dressing unit 50 .
- the controller 10 comprises a microprocessor 11 , a power supply unit 12 and a control panel 13 .
- the power supply unit 12 electrically connects to the microprocessor 11 , provides electricity and may be a battery set, or may be a power converter connected to an external power source.
- the control panel 13 is attached to an outer surface of the controller 10 and electrically connects to the microprocessor 11 and the power supply unit 12 .
- the sensor assembly 20 comprises a negative pressure sensor 21 , a positive pressure sensor 22 and a relief valve 23 .
- the relief valve 23 adjusts the pressure of the system and may apply an intermittent mode.
- the actuator 30 comprises a micro pump 31 .
- the collector 40 comprises a collecting bag 41 and a liquid absorber 42 .
- the liquid absorber 42 is mounted in the collecting bag 41 .
- the wound-dressing unit 50 comprises a wound sheet 51 and a conduit 52 .
- the wound sheet 51 has an opening 511 .
- the conduit 52 is attached securely to the wound sheet 51 and is connected to the opening 511 and has a filter strip 521 .
- the filter strip 521 is made of biocompatibility materials and keeps solid chips such as tissue fragment from flowing into the conduit 52 .
- the conduit 52 is attached securely to the wound sheet 51 by ultrasonic welding.
- the negative pressure wound therapy system in accordance with the present invention comprises electrical connection and fluid connection to connect aforementioned elements.
- the controller 10 is electrically connected to the sensor assembly 20 , and the sensor assembly 20 is electrically connected to the actuator 30 .
- Detachable electrical wire set forms the electrical connection.
- an electrical wire 61 with a plug 62 protrudes out from the sensor assembly 20 .
- the controller 10 has a corresponding socket 63 .
- the plug 62 is plugged detachably into the socket 63 to form the electrical connection.
- a fluid connection is formed between the pump inlet 311 of the micro pump 31 and the conduit 52 .
- a fluid connection is formed between the pump outlet 312 of the micro pump 31 and the entry end of the collecting bag 41 .
- a check valve is mounted in the entry end 411 of the collecting bag 41 to keep the liquid in the collecting bag 41 from flowing back to infect the wound.
- Detachable fluid tube set forms the fluid connections. For example, a first tube 64 with a fluid connector 65 protrudes out from the micro pump 31 and a second tube 64 with a fluid connector 65 protrudes out from the conduit 52 .
- the fluid connectors 65 detachably connect to each other to form the fluid connection.
- a fluid connection is formed between the positive pressure sensor 22 and the detecting end 412 of the collecting bag 41 .
- a fluid connection is formed between the negative pressure sensor 21 , the relief valve 23 and the conduit 52 , especially through the pump inlet 311 of the micro pump 31 .
- Detachable tube set forms the fluid connections.
- a tube 64 with a first fluid connector 65 protrudes out from the positive pressure sensor 22 .
- a second fluid connector 65 is mounted on the detecting end 412 of the collecting bag 41 .
- the fluid connectors 65 detachably connect to each other to form the fluid connection.
- the sensor assembly 20 has a first connecting interface 201
- the actuator 30 has a second connecting interface 301 .
- the first connecting interface 201 has a first electrical connector 202 and a first fluid connector 203 .
- the second connecting interface 301 has a second electrical connector 302 and a second fluid connector 303 .
- the micro pump 31 is electrically connected to the second electrical connector 302 .
- the connecting interfaces 201 , 301 are connected detachably to each other.
- the first electrical connector 202 is connected to the second electrical connector 302 .
- the first fluid connector 203 is connected to the second fluid connector 303 .
- a fluid division 66 may be a manifold and comprises a first passage 661 and a second passage 662 .
- the first passage 661 connects the pump inlet 311 of the micro pump 31 and the conduit 52 .
- the second passage 662 connects the second fluid connector 303 and the conduit 52 .
- filters 70 are mounted in the detecting end 412 of the collecting bag 41 and the second fluid connector 303 of the actuator 30 to keep the infections from flowing into the sensor assembly 20 .
- the wound sheet 51 covers the wound of the patient with the opening 511 facing the wound.
- the user actuates the micro pump 31 through the control panel 13 .
- the micro pump 31 creates a negative pressure environment in the wound through the fluid connections and extracts the pus and infection subjects from the wound.
- the pus and infection subjects pass through the actuator 30 and are collected in the collecting bag 41 .
- the system as described has following advantages.
- each component Since all of the components connect to each other by detachable electrical wire sets and detachable tube sets, each component is available to be disassembled and repaired independently.
- the components have different lifespan.
- the collector 40 and the wound-dressing unit 50 directly contact the infections so that the collector 40 and the wound-dressing unit 50 need to be replaced frequently while the controller 10 , the actuator 30 and the sensor assembly 20 can be used for a long time. Therefore, the detachable connections are convenient for users to disassemble and replace each component.
- the detachable connections allow the user only bring some of the components to move.
- the user only carries the controller 10 , the sensor assembly 20 and the actuator 30 , and leaves the collectors 40 and the wound-dressing units 50 at different places, and vice versa. Therefore, the user only needs to carry part of the system.
- the actuator 30 is located in front of the collecting bag 41 .
- the micro pump 31 is directly connected to the wound sheet attached on the wound so that the micro pump uses less power.
- a feedback control method in accordance with the present invention for the system as described comprises a test mode and an operating mode.
- the system enters the test mode.
- the micro pump 31 inflates the fluid connections in the system.
- the positive pressure sensor 22 detects whether the positive pressure at the detecting end 412 of the collecting bag 41 is normal.
- the test mode is ended.
- the positive pressure is normal. If the positive pressure is normal, the system enters the operating mode.
- the micro pump 31 creates a negative pressure environment in the wound through the opening 511 of the wound sheet 51 and extracts the pus and infection subjects from the wound. Then the collecting bag 41 is accordingly formed as a positive pressure environment. Then the positive pressure detecting procedure and negative pressure detecting procedure are started.
- the positive pressure detecting procedure detects the positive pressure in the collecting bag 41 .
- the positive pressure sensor 22 detects whether the positive pressure in the collecting bag 41 is normal. When the fluid connections between the collecting bag 41 and other elements are disconnected, or an external overload is applied to the collecting bag 41 , or the collecting bag 41 is full of liquid, the positive pressure of the detecting end 412 of the collecting bag 41 is abnormal. If the positive pressure is abnormal, the positive pressure sensor 22 sends a signal to the microprocessor 11 to stop the micro pump 31 and send an alarm signal to notify the user. Therefore, the pus and the infection subjects are prevented from leaking out of the fluid connections or the collecting bag 41 is prevented from breaking because of overload or being full. Then the operating mode is ended. If the positive pressure is normal, the positive pressure sensor 22 keeps processing the positive pressure detecting procedure.
- the negative pressure detecting procedure detects the negative pressure in the wound.
- the negative pressure sensor 21 detects whether the negative pressure in the opening 511 of the wound sheet 51 is normal. When the fluid connections is obstructed or is disconnected, the negative pressure is abnormal. If the negative pressure is abnormal, the negative pressure sensor 21 sends a signal to the microprocessor 11 to stop the micro pump 31 and send an alarm signal to notify the user. If the negative pressure is normal, the negative pressure sensor 23 keeps processing the positive pressure detecting procedure.
Abstract
A negative pressure wound therapy system creates a negative pressure environment in the opening of a wound-dressing unit and a positive pressure environment in the collecting bag. Then a positive pressure detecting procedure is proceeded in the positive pressure environment and a negative pressure detecting procedure is proceeded in the negative pressure environment. The detecting results are sent to determine whether a micro pump is stopped.
Description
- 1. Field of the Invention
- The present invention relates to a negative pressure wound therapy system and a feedback control method for the same, especially to a therapy system creating negative pressure in the wound environment to promote healing in wounds.
- 2. Description of the Prior Arts
- Negative pressure wound therapy utilizes wound sheets, soft suction pads, or biocompatibility pore materials to attach on the wounds and connects to a vacuum pump. The vacuum pump creates negative pressure in the wound to extract the pus and infection subjects and to draw the healthy tissue fluid so that a moist therapy environment is maintained. Therefore, the blood circulation around the wound is promoted to accelerate wound healing.
- One of the conventional negative pressure wound therapy systems has a rigid collector connecting to a front end of the vacuum pump to extract the pus and the infection subjects into the rigid collector. A negative pressure sensor detects the negative pressure in the collector to determine whether the traditional system is operated normally. However, since the vacuum pump is connected to the rear end of the rigid collector, the pump is further from the wound so that the pump needs more power to create negative pressure in the wound and to extract the pus and the infection subjects from the wound.
- Another conventional negative pressure wound therapy system solves the above problem. The collector is connected to the rear end of the vacuum pump. The vacuum pump is directly connected to the wound sheet attached on the wound so that the vacuum pump uses less power. However, the collector does not have the same negative pressure environment as the wound. Therefore, the negative pressure sensor is not useful to detect.
- To overcome the shortcomings, the present invention provides a negative pressure wound therapy system and a feedback control method for the same to mitigate or obviate the aforementioned problems.
- The main objective of the present invention is to provide a negative pressure wound therapy system and a feedback control method for the same. The system creates a negative pressure environment in the opening of a wound-dressing unit and a positive pressure environment in the collecting bag. Then a positive pressure detecting procedure is proceeded in the positive pressure environment and a negative pressure detecting procedure is proceeded in the negative pressure environment. The detecting results are sent to determine whether a micro pump is stopped.
- Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
-
FIG. 1 is a perspective view of a negative pressure wound therapy system in accordance with the present invention; -
FIG. 2 is a block diagram shown the connection of the negative pressure wound therapy system inFIG. 1 ; -
FIG. 3 is a perspective view of a wound-dressing unit of the negative pressure wound therapy system; -
FIG. 4 is an exploded perspective view of the negative pressure wound therapy system inFIG. 1 ; -
FIG. 5 is an exploded perspective view of a sensor assembly and an actuator of the negative pressure wound therapy system inFIG. 1 ; -
FIG. 6 is a partial perspective view of the actuator of the negative pressure wound therapy system inFIG. 1 ; -
FIG. 7 is a flow chart shown test mode of a feedback control method in accordance with the present invention for the negative pressure wound therapy system inFIG. 1 ; and -
FIG. 8 is a flow chart shown operating mode of the feedback control method for the negative pressure wound therapy system inFIG. 1 . - With reference to
FIG. 1 , a negative pressure wound therapy system in accordance with the present invention comprises acontroller 10, asensor assembly 20, anactuator 30, acollector 40 and a wound-dressing unit 50. - With reference to
FIGS. 1 and 2 , thecontroller 10 comprises amicroprocessor 11, apower supply unit 12 and acontrol panel 13. Thepower supply unit 12 electrically connects to themicroprocessor 11, provides electricity and may be a battery set, or may be a power converter connected to an external power source. Thecontrol panel 13 is attached to an outer surface of thecontroller 10 and electrically connects to themicroprocessor 11 and thepower supply unit 12. - The
sensor assembly 20 comprises anegative pressure sensor 21, apositive pressure sensor 22 and arelief valve 23. Therelief valve 23 adjusts the pressure of the system and may apply an intermittent mode. - The
actuator 30 comprises amicro pump 31. - The
collector 40 comprises acollecting bag 41 and a liquid absorber 42. Theliquid absorber 42 is mounted in thecollecting bag 41. - With reference to
FIG. 3 , the wound-dressing unit 50 comprises awound sheet 51 and aconduit 52. Thewound sheet 51 has anopening 511. Theconduit 52 is attached securely to thewound sheet 51 and is connected to the opening 511 and has afilter strip 521. Thefilter strip 521 is made of biocompatibility materials and keeps solid chips such as tissue fragment from flowing into theconduit 52. In a preferred embodiment, theconduit 52 is attached securely to thewound sheet 51 by ultrasonic welding. - With reference to
FIGS. 2 and 4 , the negative pressure wound therapy system in accordance with the present invention comprises electrical connection and fluid connection to connect aforementioned elements. - The
controller 10 is electrically connected to thesensor assembly 20, and thesensor assembly 20 is electrically connected to theactuator 30. Detachable electrical wire set forms the electrical connection. For example, anelectrical wire 61 with aplug 62 protrudes out from thesensor assembly 20. Thecontroller 10 has acorresponding socket 63. Theplug 62 is plugged detachably into thesocket 63 to form the electrical connection. - A fluid connection is formed between the
pump inlet 311 of themicro pump 31 and theconduit 52. A fluid connection is formed between thepump outlet 312 of themicro pump 31 and the entry end of thecollecting bag 41. A check valve is mounted in theentry end 411 of thecollecting bag 41 to keep the liquid in thecollecting bag 41 from flowing back to infect the wound. Detachable fluid tube set forms the fluid connections. For example, afirst tube 64 with afluid connector 65 protrudes out from themicro pump 31 and asecond tube 64 with afluid connector 65 protrudes out from theconduit 52. Thefluid connectors 65 detachably connect to each other to form the fluid connection. - A fluid connection is formed between the
positive pressure sensor 22 and the detectingend 412 of thecollecting bag 41. A fluid connection is formed between thenegative pressure sensor 21, therelief valve 23 and theconduit 52, especially through thepump inlet 311 of themicro pump 31. Detachable tube set forms the fluid connections. For example, atube 64 with afirst fluid connector 65 protrudes out from thepositive pressure sensor 22. Asecond fluid connector 65 is mounted on the detectingend 412 of thecollecting bag 41. Thefluid connectors 65 detachably connect to each other to form the fluid connection. - With reference to
FIGS. 5 and 6 , in a preferred embodiment thesensor assembly 20 has a first connectinginterface 201, and theactuator 30 has a second connectinginterface 301. The first connectinginterface 201 has a firstelectrical connector 202 and a firstfluid connector 203. The second connectinginterface 301 has a secondelectrical connector 302 and a secondfluid connector 303. Themicro pump 31 is electrically connected to the secondelectrical connector 302. The connectinginterfaces electrical connector 202 is connected to the secondelectrical connector 302. The firstfluid connector 203 is connected to the secondfluid connector 303. Afluid division 66 may be a manifold and comprises afirst passage 661 and asecond passage 662. Thefirst passage 661 connects thepump inlet 311 of themicro pump 31 and theconduit 52. Thesecond passage 662 connects the secondfluid connector 303 and theconduit 52. - Furthermore, filters 70 are mounted in the detecting
end 412 of the collectingbag 41 and the secondfluid connector 303 of theactuator 30 to keep the infections from flowing into thesensor assembly 20. - With the aforementioned electrical connections and the fluid connections being detachably, the elements are available to detach from each other to be repaired independently.
- When the system as described is operated, the
wound sheet 51 covers the wound of the patient with theopening 511 facing the wound. The user actuates themicro pump 31 through thecontrol panel 13. Themicro pump 31 creates a negative pressure environment in the wound through the fluid connections and extracts the pus and infection subjects from the wound. The pus and infection subjects pass through theactuator 30 and are collected in the collectingbag 41. - The system as described has following advantages.
- 1. Since all of the components connect to each other by detachable electrical wire sets and detachable tube sets, each component is available to be disassembled and repaired independently.
- 2. The components have different lifespan. For example, the
collector 40 and the wound-dressing unit 50 directly contact the infections so that thecollector 40 and the wound-dressing unit 50 need to be replaced frequently while thecontroller 10, theactuator 30 and thesensor assembly 20 can be used for a long time. Therefore, the detachable connections are convenient for users to disassemble and replace each component. - 3. When the user moves between different places such as hospital and home, the detachable connections allow the user only bring some of the components to move. For example, the user only carries the
controller 10, thesensor assembly 20 and theactuator 30, and leaves thecollectors 40 and the wound-dressingunits 50 at different places, and vice versa. Therefore, the user only needs to carry part of the system. - 4. In the fluid connections, the
actuator 30 is located in front of the collectingbag 41. Themicro pump 31 is directly connected to the wound sheet attached on the wound so that the micro pump uses less power. - To ensure the system as described is operated safely, a feedback control method in accordance with the present invention for the system as described comprises a test mode and an operating mode.
- With reference to
FIG. 7 , when the system as described is started, the system enters the test mode. Themicro pump 31 inflates the fluid connections in the system. Then thepositive pressure sensor 22 detects whether the positive pressure at the detectingend 412 of the collectingbag 41 is normal. When the fluid connections are not connected properly, the positive pressure is abnormal. If the positive pressure is abnormal, the system outputs an alarm signal. Then the test mode is ended. When the fluid connections are connected properly, the positive pressure is normal. If the positive pressure is normal, the system enters the operating mode. - With reference to
FIG. 8 , when the system enters the operating mode, themicro pump 31 creates a negative pressure environment in the wound through theopening 511 of thewound sheet 51 and extracts the pus and infection subjects from the wound. Then the collectingbag 41 is accordingly formed as a positive pressure environment. Then the positive pressure detecting procedure and negative pressure detecting procedure are started. - The positive pressure detecting procedure detects the positive pressure in the collecting
bag 41. Thepositive pressure sensor 22 detects whether the positive pressure in the collectingbag 41 is normal. When the fluid connections between the collectingbag 41 and other elements are disconnected, or an external overload is applied to the collectingbag 41, or the collectingbag 41 is full of liquid, the positive pressure of the detectingend 412 of the collectingbag 41 is abnormal. If the positive pressure is abnormal, thepositive pressure sensor 22 sends a signal to themicroprocessor 11 to stop themicro pump 31 and send an alarm signal to notify the user. Therefore, the pus and the infection subjects are prevented from leaking out of the fluid connections or the collectingbag 41 is prevented from breaking because of overload or being full. Then the operating mode is ended. If the positive pressure is normal, thepositive pressure sensor 22 keeps processing the positive pressure detecting procedure. - The negative pressure detecting procedure detects the negative pressure in the wound. The
negative pressure sensor 21 detects whether the negative pressure in theopening 511 of thewound sheet 51 is normal. When the fluid connections is obstructed or is disconnected, the negative pressure is abnormal. If the negative pressure is abnormal, thenegative pressure sensor 21 sends a signal to themicroprocessor 11 to stop themicro pump 31 and send an alarm signal to notify the user. If the negative pressure is normal, thenegative pressure sensor 23 keeps processing the positive pressure detecting procedure. - With the aforementioned modes, the system as described is operated safely.
- Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Claims (18)
1. A feedback control method for a negative pressure wound therapy system that the system has a wound-dressing unit and a collecting bag communicating with the wound-dressing unit, the method comprising an operating mode, which comprises acts of:
(a) creating a negative pressure environment in an opening of a wound-dressing unit and a positive pressure environment in the collecting bag;
(b) proceeding a positive pressure detecting procedure in the positive pressure environment and proceeding a negative pressure detecting procedure in the negative pressure environment; and
(c) sending the detecting results to determine whether the operating mode is ended.
2. The feedback control method as claimed in claim 1 , wherein before step (a) further comprises an act of applying a micro pump between the wound-dressing unit and the collecting bag to creating the negative pressure environment and extracting the fluid in the opening.
3. The feedback control method as claimed in claim 2 , wherein positive pressure detecting procedure further comprises acts of:
detecting the positive pressure in a detecting end of the collecting bag by a positive pressure sensor; and
determining whether the positive pressure is normal; if the positive pressure is abnormal, the micro pump is stopped and the operating mode is ended; if the positive pressure is normal, the micro pump is kept operating and back to the act of the detecting positive pressure.
4. The feedback control method as claimed in claim 2 , wherein negative pressure detecting procedure further comprises acts of:
detecting the negative pressure in the opening of the wound-dressing unit by a negative pressure sensor; and
determining whether the negative pressure is normal; if the negative pressure is abnormal, the micro pump is stopped and the operating mode is ended; if the negative pressure is normal, the micro pump is kept operating and back to the act of the detecting negative pressure.
5. The feedback control method as claimed in claim 3 , wherein negative pressure detecting procedure further comprises acts of:
detecting the negative pressure in the opening of the wound-dressing unit by a negative pressure sensor; and
determining whether the negative pressure is normal; if the negative pressure is abnormal, the micro pump is stopped and the operating mode is ended; if the negative pressure is normal, the micro pump is kept operating and back to the act of the detecting negative pressure.
6. The feedback control method as claimed in claim 2 further comprising a test mode before proceeding the operating mode, wherein the test mode comprises acts of:
inflating fluid connections in the system by the micro pump;
detecting the positive pressure in a detecting end of the collecting bag by a positive pressure sensor; and
determining whether the positive pressure is normal; if the positive pressure is abnormal, an alarm signal is output and the test mode is ended; if the positive pressure is normal, the test mode is end and the operating mode is entered.
7. The feedback control method as claimed in claim 3 further comprising a test mode before proceeding the operating mode, wherein the test mode comprises acts of:
inflating fluid connections in the system by the micro pump;
detecting the positive pressure in the detecting end of the collecting bag by the positive pressure sensor; and
determining whether the positive pressure is normal; if the positive pressure is abnormal, an alarm signal is output and the test mode is ended; if the positive pressure is normal, the test mode is end and the operating mode is entered.
8. The feedback control method as claimed in claim 4 further comprising a test mode before proceeding the operating mode, wherein the test mode comprises acts of:
inflating fluid connections in the system by the micro pump;
detecting the positive pressure in the detecting end of the collecting bag by the positive pressure sensor; and
determining whether the positive pressure is normal; if the positive pressure is abnormal, an alarm signal is output and the test mode is ended; if the positive pressure is normal, the test mode is end and the operating mode is entered.
9. The feedback control method as claimed in claim 5 further comprising a test mode before proceeding the operating mode, wherein the test mode comprises acts of:
inflating fluid connections in the system by the micro pump;
detecting the positive pressure in the detecting end of the collecting bag by the positive pressure sensor; and
determining whether the positive pressure is normal; if the positive pressure is abnormal, an alarm signal is output and the test mode is ended; if the positive pressure is normal, the test mode is end and the operating mode is entered.
10. A negative pressure wound therapy system comprising:
a controller;
a sensor assembly electrically connected to the controller and comprising a negative pressure sensor and a positive pressure sensor to detect pressure, and comprising a relief valve;
an actuator comprising a micro pump electrically connected to the sensor assembly;
a collector comprising a collecting bag;
a wound-dressing unit having an opening;
a first fluid connection connecting between the sensor assembly and the collecting bag;
a second fluid connection connecting between the sensor assembly and the wound-dressing unit;
a third fluid connection connecting between the wound-dressing unit, the actuator and the collecting bag, wherein the actuator is located between the wound-dressing unit and the collecting bag in the third fluid connection;
whereby the micro pump creates a negative pressure environment in the opening through the third fluid connection and extracts the fluid from the opening of the wound-dressing unit, and the fluid passes the actuator to flow into the collecting bag, and the collecting bag is defined as a positive pressure environment.
11. The negative pressure wound therapy system as claimed in claim 10 further comprising:
a first detachable electrical wire set connecting between the sensor assembly and the controller;
a second detachable electrical wire set connecting between the sensor assembly and the micro pump;
a first detachable tube set connecting between a pump inlet of the micro pump and the sensor assembly;
a second detachable tube set connecting between a detecting end of the collecting bag and the sensor assembly;
a third detachable tube set connecting between an inlet end of the collecting bag and a pump outlet of the micro pump;
a fourth detachable tube set connecting between the wound-dressing unit and the sensor assembly; and
a fifth detachable tube set connecting between the wound-dressing unit and the pump inlet of the micro pump, wherein
the first fluid connection is formed by the second detachable tube set;
the second fluid connection is formed by the fourth detachable tube set; and
the third fluid connection is formed by the first, third and fifth detachable tube sets.
12. The negative pressure wound therapy system as claimed in claim 11 , wherein
the wound-dressing unit comprises
a wound sheet, where the opening of the wound-dressing unit is formed through; and
a conduit attached securely to the wound sheet, connected to the opening and having a filter strip made of biocompatibility materials;
the fourth detachable tube set connects between the conduit and the negative pressure sensor and the relief valve; and
the fifth detachable tube set connects between the conduit and the pump inlet of the micro pump.
13. The negative pressure wound therapy system as claimed in claim 12 further comprising a fluid division, wherein
the sensor assembly has a first connecting interface having a first electrical connector and a first fluid connector; and
the actuator has a second connecting interface connected detachably to the first connecting interface and having
a second electrical connector electrically connected to the micro pump connected to the first electrical connector; and
a second fluid connector connected to the first fluid connector;
the fluid division comprises
a first passage connecting the pump inlet of the micro pump and the conduit; and
a second passage connecting the second fluid connector and the conduit.
14. The negative pressure wound therapy system as claimed in claim 12 , wherein the fifth detachable tube set comprises a first tube with a fluid connector protruding out from the micro pump and a second tube with a fluid connector protruding out from the conduit, and the fluid connectors detachably connect to each other.
15. The negative pressure wound therapy system as claimed in claim 13 , wherein the fifth detachable tube set comprises a first tube with a fluid connector protruding out from the micro pump and a second tube with a fluid connector protruding out from the conduit, and the fluid connectors detachably connect to each other.
16. The negative pressure wound therapy system as claimed in claim 15 , wherein the second detachable tube set comprises a tube with a first fluid connector protruding out from the positive pressure sensor and a second fluid connector mounted on the detecting end of the collecting bag, and the fluid connectors detachably connect to each other.
17. The negative pressure wound therapy system as claimed in claim 16 further comprising two filters respectively mounted in the detecting end of the collecting bag and the second fluid connector of the actuator to keep the infections from flowing into the sensor assembly.
18. The negative pressure wound therapy system as claimed in claim 17 further comprising check valve mounted in an entry end of the collecting bag to keep the liquid in the collecting bag from flowing back.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US12/872,973 US20120053541A1 (en) | 2010-08-31 | 2010-08-31 | Negative pressure wound therapy system and a feedback control method for the same |
US13/930,193 US9278164B2 (en) | 2010-08-31 | 2013-06-28 | Negative pressure wound therapy system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US12/872,973 US20120053541A1 (en) | 2010-08-31 | 2010-08-31 | Negative pressure wound therapy system and a feedback control method for the same |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/930,193 Division US9278164B2 (en) | 2010-08-31 | 2013-06-28 | Negative pressure wound therapy system |
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US20120053541A1 true US20120053541A1 (en) | 2012-03-01 |
Family
ID=45698167
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US12/872,973 Abandoned US20120053541A1 (en) | 2010-08-31 | 2010-08-31 | Negative pressure wound therapy system and a feedback control method for the same |
US13/930,193 Expired - Fee Related US9278164B2 (en) | 2010-08-31 | 2013-06-28 | Negative pressure wound therapy system |
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US13/930,193 Expired - Fee Related US9278164B2 (en) | 2010-08-31 | 2013-06-28 | Negative pressure wound therapy system |
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Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140148768A1 (en) * | 2012-11-26 | 2014-05-29 | Apex Medical Corp. | Wound drainage therapy system |
GB2508696A (en) * | 2012-09-21 | 2014-06-11 | I2R Medical Ltd | Negative pressure wound therapy with relief valve and multi-compartment container |
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US10624794B2 (en) | 2018-02-12 | 2020-04-21 | Healyx Labs, Inc. | Negative pressure wound therapy systems, devices, and methods |
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US20220080105A1 (en) * | 2012-03-12 | 2022-03-17 | Smith & Nephew Plc | Reduced pressure apparatus and methods |
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Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4681562A (en) * | 1984-11-16 | 1987-07-21 | Walter Beck | Method and apparatus for aspirating secreted fluids from a wound |
US20100010477A1 (en) * | 2008-07-08 | 2010-01-14 | Tyco Healthcare Group Lp | Portable Negative Pressure Wound Therapy Device |
US20100312202A1 (en) * | 1998-08-07 | 2010-12-09 | Alan Wayne Henley | Wound Treatment Apparatus |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4798583A (en) * | 1984-11-16 | 1989-01-17 | Walter Beck | Method and apparatus for aspirating secreted fluids from a wound |
DE3943300A1 (en) * | 1989-12-29 | 1991-07-11 | Werner Margrit Dipl Ing Fh | SYSTEM FOR COLLECTION AND RETRANSFUSION OF AUTOLOGOUS BLOOD |
AU2006287461A1 (en) * | 2005-09-07 | 2007-03-15 | Tyco Healthcare Group L.P. | Self contained wound dressing apparatus |
DK2010245T3 (en) * | 2005-11-21 | 2016-01-18 | Joshua David Smith | WOUND CARE SYSTEM |
WO2008021306A2 (en) * | 2006-08-15 | 2008-02-21 | Bio-Innovative Operations, Inc. | Computer adjusted pressure wound care devices, systems & methods |
US20090281526A1 (en) * | 2008-05-09 | 2009-11-12 | Tyco Healthcare Group Lp | Negative Pressure Wound Therapy Apparatus Including a Fluid Line Coupling |
-
2010
- 2010-08-31 US US12/872,973 patent/US20120053541A1/en not_active Abandoned
-
2013
- 2013-06-28 US US13/930,193 patent/US9278164B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4681562A (en) * | 1984-11-16 | 1987-07-21 | Walter Beck | Method and apparatus for aspirating secreted fluids from a wound |
US20100312202A1 (en) * | 1998-08-07 | 2010-12-09 | Alan Wayne Henley | Wound Treatment Apparatus |
US20100010477A1 (en) * | 2008-07-08 | 2010-01-14 | Tyco Healthcare Group Lp | Portable Negative Pressure Wound Therapy Device |
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