US20190192746A1 - Method for providing negative pressure to a negative pressure wound therapy bandage - Google Patents

Method for providing negative pressure to a negative pressure wound therapy bandage Download PDF

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Publication number
US20190192746A1
US20190192746A1 US16/234,241 US201816234241A US2019192746A1 US 20190192746 A1 US20190192746 A1 US 20190192746A1 US 201816234241 A US201816234241 A US 201816234241A US 2019192746 A1 US2019192746 A1 US 2019192746A1
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negative pressure
pressure
wound
source
target
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US16/234,241
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John Buan
Richard Willems
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Smith and Nephew Inc
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Smith and Nephew Inc
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Priority to US201161490118P priority Critical
Priority to US13/299,783 priority patent/US9067003B2/en
Priority to US14/737,387 priority patent/US10300178B2/en
Application filed by Smith and Nephew Inc filed Critical Smith and Nephew Inc
Priority to US16/234,241 priority patent/US20190192746A1/en
Publication of US20190192746A1 publication Critical patent/US20190192746A1/en
Application status is Pending legal-status Critical

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/0023Suction drainage systems
    • A61M1/0031Suction control
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/00051Accessories for dressings
    • A61F13/00068Accessories for dressings specially adapted for application or removal of fluid, e.g. irrigation or drainage of wounds, under-pressure wound-therapy
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/0023Suction drainage systems
    • A61M1/0037Intermittent or pulsating suction
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/008Drainage tubes; Aspiration tips
    • A61M1/0088Drainage tubes; Aspiration tips with a seal, e.g. to stick around a wound for isolating the treatment area
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F2013/00089Wound bandages
    • A61F2013/0017Wound bandages possibility of applying fluid
    • A61F2013/00174Wound bandages possibility of applying fluid possibility of applying pressure
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F2013/00361Plasters
    • A61F2013/00365Plasters use
    • A61F2013/00536Plasters use for draining or irrigating wounds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/33Controlling, regulating or measuring
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M2210/00Anatomical parts of the body
    • A61M2210/04Skin

Abstract

A method for providing a negative pressure wherein a pump is cycled on and off to achieve a target negative pressure, which is set slightly lower than the therapeutic negative pressure. A device determines the actual pressure by averaging samples which may occur at a different rate than the pump cycle.

Description

    CROSS REFERENCE TO RELATED APPLICATIONS
  • This application claims priority to U.S. Provisional Application No. 61/490,118 filed May 26, 2011, the entirety of which is incorporated herein by reference.
  • FIELD OF THE INVENTION
  • The invention relates to a method for providing negative pressure to a negative pressure wound therapy bandage.
  • BACKGROUND OF THE INVENTION
  • Negative pressure wound therapy is one method that is used to treat certain wounds or sores on people. In general the treatment includes, a bandage being placed over a wound site, and connected to a pumping device. The pumping device provides suction, creating a negative pressure under the bandage at the wound site. Exudates and other materials are removed from the wound site, allowing the wound to heal faster than under ambient pressure.
  • The pumping device includes, amongst other things, a pump. Typically, a user selects (or otherwise enters) an appropriate therapeutic pressure on the pumping device that correlates to the specific negative pressure treatment for that patient. It is important that the pump and pumping device achieve the therapeutic pressure that is to be used in association with the negative pressure wound therapy quickly and correctly.
  • The speed at which the pump can achieve the therapeutic pressure is important because the speed can detrimentally effect the treatment. Moreover, the ability for the pump to recognize that the therapeutic pressure has been achieved is important to avoid applying too little or too much negative pressure. Thus, for a pump device, the speed and the accuracy at which it obtains the therapeutic pressure is an important characteristic.
  • In order to accurately and quickly achieve the therapeutic pressure, some pumps are left on continuously. In some devices this can be problematic. For example, some pumps can quickly achieve the therapeutic pressure; however, the pump and system tends to overshoot the therapeutic pressure value. This requires additional valves and other components that allow the pumping device to release negative pressure until the appropriate negative pressure is obtained.
  • Moreover, leaving the pump on continuously can act as a power drain, and for pumping devices that operate on batteries or other portable power sources, this can negatively impact the life time of the power source.
  • The present invention is directed to resolving these and other matters.
  • SUMMARY OF THE INVENTION
  • In one embodiment of the invention, the invention is directed towards a method for providing negative pressure to a negative pressure wound therapy bandage by providing a pumping device having a pump and setting a therapeutic negative pressure on the pumping device. The pumping device determines a target negative pressure associated with the therapeutic negative pressure and the target negative pressure is less than the therapeutic negative pressure (as discussed herein, “less than” means it is less negative, or a lower amount of a negative pressure, in other words, closer to zero). The pumping device is connected to a negative pressure wound therapy bandage. The target negative pressure is achieved by cycling the pump on and off to create a negative pressure in the negative pressure wound therapy bandage, obtaining a plurality of samples of the negative pressure in the negative pressure wound therapy bandage, each sample being obtained at a first set time interval, calculating an average of a predetermined number of consecutive samples, comparing the average to the target negative pressure, and, continuing to cycle the pump on and off until the average is greater than the target pressure.
  • The method may also include after cycling the pump on and off until the average of samples is greater than the target pressure after the complete off cycle, sampling the negative pressure in the negative pressure wound therapy bandage at a second set time interval greater than the first set time interval.
  • In another embodiment of the invention, the sampling of the negative pressure in the negative pressure wound therapy bandage at the second set time interval begins when the pump has been off for a predetermined amount of time.
  • The predetermined amount of time may be 300 milliseconds.
  • The second set time interval may be 1000 milliseconds and the first set time interval is 100 milliseconds.
  • In an embodiment, the cycling of the pump on and off to create negative pressure in the negative pressure wound therapy bandage on is performed by turning the pump on for 80 milliseconds and then turning the pump off for 80 milliseconds.
  • In some embodiments of the present invention, the therapeutic negative pressure is 125 mmHg and the target negative pressure is approximately 115 mmHg.
  • In some embodiments of the present invention, the therapeutic negative pressure is 90 mmHg and the target negative pressure is approximately 85 mmHg.
  • In some embodiments of the present invention, the therapeutic negative pressure is 60 mmHg and the target negative pressure is approximately 54 mmHg.
  • In some embodiments of the present invention, the therapeutic negative pressure is 40 mmHg and the target negative pressure is approximately 34 mmHg.
  • In another embodiment of the invention, the invention is for a method for providing negative pressure to a negative pressure wound therapy bandage by providing a pumping device having a pump and setting a therapeutic negative pressure on the pumping device. The pumping device determines a target negative pressure associated with the therapeutic negative pressure and the target negative pressure is less than the therapeutic negative pressure. The pumping device is connected to a negative pressure wound therapy bandage. The target negative pressure is achieved by cycling the pump on and off for a first predetermined amount of time to create a negative pressure in the negative pressure wound therapy bandage, obtaining a plurality of samples of the negative pressure in the negative pressure wound therapy bandage, each sample being obtained at a first set time interval, calculating an average of a predetermined number of consecutive samples, comparing the average to the target negative pressure, and, if the average is not greater than the target negative pressure, repeating the steps of cycling the pump on and off, obtaining a plurality of samples, calculating an average and comparing the average, until the average is greater than the target negative pressure.
  • In some embodiments the comparing of the average occurs at a rate faster than the rate of calculating the average.
  • In some embodiments, if the average is greater than the target negative pressure, the target negative pressure is maintained by obtaining a plurality of second samples of the negative pressure in the negative pressure wound therapy bandage at a second set time interval begin greater than the first time interval, and, comparing each second sample to the target negative pressure, and, repeating the steps of obtaining and comparing if a second sample is greater than the target negative pressure.
  • In some embodiments, if a second sample is not greater than the target negative pressure, the step of achieving the target negative pressure by: cycling the pump on and off; obtaining a plurality of samples; calculating an average; and, comparing the average until the average is greater than the target negative pressure, is repeated.
  • In the various embodiments of the present invention, the therapeutic negative pressure may be selected from the group consisting of: 40 mmHg; 60 mmHg; 90 mmHg; and, 125 mmHg.
  • An invention according to one or more of the disclosed embodiments allows the pump to achieve the therapeutic negative pressure/target negative pressure reasonably quickly and limit exceeding the therapeutic negative pressure/target negative pressure as much as practical.
  • Moreover, at least one of the embodiments also provides a reliable method to detect when the bandage pressure was being “topped-up” too frequently due to a leak (i.e., often returning to cycle the pump on and off to increase negative pressure). It is expected that the system will leak a small amount over time, for example, due to the imperfect plumbing connections in the system. A leak rate of one “top-up” per minute is normal. However, a leak rate four times that is cause for a minor leak to be declared. Such a leak rate is still within the bounds of the system to handle long term but the user should be informed so that it is corrected and system battery life is extended. It is also desirable to clear the fault as soon as it appears that the leaking has returned to normal levels.
  • It is to be understood that the aspects and objects of the present invention described above may be combinable and that other advantages and aspects of the present invention will become apparent upon reading the following description of the drawings and detailed description of the invention.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • The present invention will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. Understanding that the accompanying drawings depict only typical embodiments, and are, therefore, not to be considered to be limiting of the scope of the present disclosure, the embodiments will be described and explained with specificity and detail in reference to the accompanying drawings as provided below.
  • FIG. 1 is a front perspective view of a device used in association with one or more embodiments of the present invention.
  • FIG. 2 is a front side cutaway view of a device provided according to one or more embodiments of the present invention.
  • FIG. 3 is a flow chart of a method according to one or more embodiments of the present invention.
  • DETAILED DESCRIPTION OF THE DRAWINGS
  • While this invention is susceptible of embodiment in many different forms, there is shown in the drawings and will herein be described in detail one or more embodiments with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the embodiments illustrated.
  • Reference throughout this description to features, advantages, objects or similar language does not imply that all of the features and advantages that may be realized with the present invention should be or are in any single embodiment of the invention. Rather, language referring to the features and advantages is understood to mean that a specific feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention. Thus, discussion of the features and advantages, and similar language, throughout this specification may, but do not necessarily, refer to the same embodiment.
  • As shown in the attached FIGS. 1 and 2, the present invention is directed towards a method used with a pumping device 10 having a pump 20. The pumping device 10 generally includes a pressure sensor 22, a check valve 24, a control circuit 26 (with microcontroller), internal plumbing 28, LEDs 30 and a power source 32.
  • In order to provide negative pressure to a wound, the pumping device 10 is connected to a negative pressure wound therapy bandage 12, typically with tubing 14.
  • In order to achieve a target negative pressure the pumping device 10 turns the pump 20 on for short amounts of time when the pressure is below the target pressure.
  • The pump device 10 typically operates as follows: a microcontroller turns the pump 20 on via a digital output; the pump 20 starts producing a vacuum; the vacuum is converted to a voltage by a pressure sensor 22; the voltage is converted by an analog to digital converter (“the A/D”) to a standard, recognized pressure engineering unit; and, the microcontroller compares the monitored pressure to the target pressure.
  • In order to achieve the target negative pressure in a short amount of time and avoid overshooting the target negative pressure, the pump 20 is cycled. The duty cycle, the percentage of pump on time relative to pump off time, after examining several pumps in action, can be constant for a variety of pumps 20. How much vacuum the pump 20 can draw in a short time period will influence the pump on time. Moreover, bandage 14 and plumbing 28 elasticity and how quickly the pressure sensor 22 and the A/D can take a measurement will influence the pump off time.
  • In one embodiment, the pressure sensor 22 measurement time is 20 milliseconds; while the A/D measurement time is 16 microseconds. Therefore, since a change in pressure must first be converted by the pressure sensor 22 and then the A/D, the minimum measurement time is 20.016 milliseconds.
  • It is believed to be advantageous to average readings before they are used to mitigate occasional measurement system anomalies. The number of samples in the average, on the one hand, when it tends to be low, do some anomaly mitigation but also remain the most responsive to quick changes in the parameter they are measuring. The best anomaly mitigation appears to occur when the number of samples is high, but then the averaging is not very responsive to quick changes in the parameter they are measuring.
  • It was determined that it would be advantageous to use a sliding 5 sample average. If the pressure were sampled continuously, a complete average would be ready in: 5×20.016=100.090 milliseconds. However, it would not be necessary to wait for all 5 samples to be acquired before a pump control decision was made on the value because just a few samples still mitigates against system anomalies sufficiently. However, sampling the pressure continuously, especially since the pressure sensor 22 places the largest mA load of any component (other than the pump 20) on the system would unnecessarily shorten battery life for too little gain in pump control.
  • Consequently, a measurement process asynchronous to the pump on/off cycle was used wherein pressure samples are contributed to the average every 100 milliseconds, and if the pump on/off control logic compared the average every 80 milliseconds it would compare it often enough to determine an average affected by the very last contribution that was made to that average. This can be achieved by: starting the process every 100 milliseconds; waiting the 20 milliseconds pressure sensor measurement time; then, measuring the pressure with the A/D.
  • It is contemplated to synchronize the completion of the A/D measurement to the pump on/off control logic exactly but software design best practice says that dependencies between software modules should be avoided where possible and synchronization is not necessary here—the pump on/off control logic (cycle) will see every change any contribution makes to the average.
  • When the pump 20 has met its target pressure, the A/D sampling and comparing process detailed above changes from, for example, a repeat rate of 100 milliseconds to a repeat rate of 1000 milliseconds when the pump has been off for a sufficient amount of time. This further saves battery life at a time when the pressure is not likely to change very much. The period of time the pump 20 has to be off to switch to the slower repeat rate may be, for example, 300 milliseconds; however, it may be any value that was larger than the off period in the pump on/off duty cycle (more later on the duty cycle). Moreover, it should be at least that long to distinguish the “off” that is due to the pump 20 having reached the target pressure and the “off” of the pump control duty cycle. (The 300 milliseconds was utilized as it is a sufficient amount of time for the A/D to wait before it samples the battery voltage after the pump is turned off The battery is only sampled when the pump 20 is turned off because the mA load that the pump places on the system is significantly different than when it is off and battery life is more easily predicted when the pump is not loading the system.)
  • The pump control on/off duty cycle is preferably 80 milliseconds on and 80 milliseconds off. It was determined that an “on” time of 40 or 80 milliseconds was sufficient for constraining the overshoot for a variety of bandages 12. The 40 milliseconds value constrained it better, yielded end pressures closer to the target pressure, but took longer to get to the target pressure. The “on” times longer than 80 milliseconds created out-of-bounds overshoot for some bandages—no matter what the “off” time was. As mentioned above, the “off” time has an effect on the measurement part of the control / measurement algorithm. Further, plumbing and bandage elasticity, although minor, can contort the average or “steady” pressure for a short while. It is believed that it is advantageous to let such pressure contortions settle before measurement. Moreover, the pressure sensor 22 and A/D measurements need time also as noted above.
  • An “off” time of approximately 30 milliseconds would cover both but it was convenient to use the same 80 milliseconds timer to control both the on time and the off time. Further, letting the system settle longer, for one or more multiples of the 80 milliseconds, would improve the quality of the measurement because it would let the sliding average fill more completely—at the cost of taking longer to get to the end pressure. While these times have been discussed, nothing herein should be construed to limit the present invention to these times.
  • In use, a user inputs the therapeutic negative pressure into the pumping device. Of course, this can be accomplished with the pumping device having pre-set therapeutic negative pressures and the user merely selects one.
  • In one or more embodiments of the present invention, a target negative pressure is set slightly less than the therapeutic negative pressure entered by the user into pumping device. In a working example of an embodiment of the invention, the following parameters were used with the object to obtain the therapeutic negative pressure of 40/60/90/125 mmHg within 15 seconds and limit overshoot to +/−10% of the therapeutic negative pressure. However, for the 40 mmHg therapeutic negative pressure, the tolerance is preferably +/−10 mmHg (not +/−10%).
  • Using a target negative pressure that is set slightly less than the 40/60/90/125 therapeutic negative pressure allows for compensation of the system's tendency to undervalue the actual negative pressure within the bandage. Therefore, the target pressures contemplated to be used with the previously mentioned therapeutic negative pressure values are 34, 54, 85 and 115 mmHg (respectively). Other target pressures can be used depending on the variety of parameters discussed above (pump, bandage, elasticity, etc.) without departing from the spirit of the present invention.
  • In a device according to one or more embodiments of the present invention, the pump 20 will reasonably quickly achieve the target negative pressure, stop, “top-up” once or twice after a few seconds and transition to the state where it only tops-up every minute or so to compensate for system leaking. The initial one or two top-ups are due to the pressure completely settling.
  • In sum, in one or more embodiments of the present invention, pressure is sampled every 100 ms; with the sampling by the pressure sensor and A/D taking 20.016 milliseconds. Samples go into a sliding 5 element average. The pumping device 10 asynchronously compares the average every 80 milliseconds s (slightly faster than the pressure is sampled). The pumping device 10 turns the pump 20 on for no more than one cycle (80 milliseconds) if pressure is below target pressure. After waiting one off cycle (80 milliseconds), if the pressure is still below the target pressure, the pump 20 is turned on again. These last two steps repeat until the pressure is greater than the target pressure, at which point the pump 20 is left off until the normal leaking in the system reduces the pressure below the target pressure. During the period when the pressure is above the target pressure, starting when the pump 20 has been continuously off for 300 milliseconds, sampling may be reduced to the 1000 milliseconds rate (to extend battery life).
  • A flow chart for performing the steps of some embodiments is shown in FIG. 3. As shown therein, and as discussed above, a method according to one or more embodiments of the present invention may begin with the setting of a therapeutic negative pressure 100. In response to same, the pumping device will determine a target negative pressure 102. As previously discussed the target negative pressure is less than the therapeutic negative pressure.
  • At this point, the pumping device will begin to cycle the pump on and off 104. In addition, the pumping device will also begin sampling the pressure at the bandage 106. This sampling is preferably done at a set time. In FIG. 3, this is shown as being at “Timing A.” The pumping device determines if there are at least five samples measured 108. If less than five samples have been collected 100, the pumping device continues to sample the pressure at the bandage 106.
  • If, however, more than five samples have been collected 112, the pumping device will calculate the average of the last five samples taken 114. The pumping device will then compare the average of the last five samples to the target negative pressure 116. If the average of the last five samples is less than the target negative pressure 118, the pumping device will continue to sample the pressure at the bandage 106.
  • If the average of the last five samples is greater than the target pressure 120, the pumping device will cease the pump cycling. It is contemplated, although not required, that if the pump is in the middle of a cycle, that specific cycle be completed, before the pumping cycling is stopped. Alternatively, the pump cycling can be immediately stopped when the average is determined to be greater than the target negative pressure.
  • After the pump cycling has been stopped, the device begins sampling the pressure at the bandage 124. This sampling is conducted, preferably at a predetermined time interval, and as shown, occurs at “Timing B.” As previously mentioned, in order to increase the life of the batteries that may be powering the pumping device, it is preferred that Timing B is greater than Timing A.
  • Finally, the device continues to compare the sample of the pressure (taken in step 124) with the target negative pressure 126. If the most recent sample is greater than the target negative pressure 128, the device continues to sampling the pressure at the bandage 124.
  • If the most recent sample is less than the target pressure 130, the device may turn the pump on for one cycle 132, and continue to sample the pressure under the bandage 124. Alternatively, the device can return to cycling the pumping on and off 104 and the subsequent steps previously taken to achieve the target negative pressure.
  • In addition to achieving and maintaining negative pressure, one or more embodiments of the present invention also include a method for detecting a leak. For example, if the target negative pressure has been reached and at least 20 top-ups have occurred at the target negative pressure and the average of the last N (=3) top-up intervals is less than 15 seconds, a leak may be declared by the pump device. The minor leak detection may be cleared if the pump is disabled by the user or the top-up intervals are greater than or equal to 15 seconds.
  • The 15 seconds time value is related to an unacceptable leak rate (4 top-ups per minute) that was determined to be optimal. The pumping device records the time (since unit reset) of every top-up into a circular array of N elements and checks the top-up interval at every top-up or every 80 milliseconds, whichever occurs first. (The “or 80 milliseconds” facet is more useful for clearing the fault than declaring it.)
  • The time in the oldest of the array elements is subtracted from the current time and then divided by N to either yield the average of the last N top-ups (or what the average would have been if the 80 milliseconds timer tick that prompted the check was a top-up). An example of setting the fault and clearing the fault is given below:
  • Table One:
  • Setting the fault (assume 17 top-ups for this pressure have already
    occurred):
    Top-Up # Time Note
    18 05:42:23.000
    19 05:42:33.000
    20 05:42:43.000 Check called due to this top-up.
    System time is 05:42:43.
    System time − oldest top-up time = 00:00:20
    00:00:20/3 = 6
    6 < 15, fault declared
  • The checks called due to the 80 milliseconds timer expiring are not shown in the above because they would have had no effect and their omission makes it easier to understand how the checks due to just the top-ups take place.
  • TABLE TWO
    Clearing the fault (assume a continuation of the above TABLE ONE)
    Top-Up # Time Note
    18 05:42:23.000
    19 05:42:33.000
    20 05:42:43.000 Check called due to this top-up.
    System time is 05:42:43.
    System time − oldest top-up time = 00:00:20
    00:00:20/3 = 6
    6 < 15, fault declared
    05:42:43.080 Check called due to 80 ms timer tick,
    System time is 05:42:43.080
    System time − oldest top-up time =
    00:00:20.080
    00:00:20.080/3 = 6
    6 still less than 15, fault stands
    05:42:43.160 Similar to the previous, fault stands
    etc No top-ups
    etc No top-ups
    05:43:08.000 Check called due to 80 ms timer tick
    System time is 05:43:08.000
    System time − oldest top-up time = 00:00:45
    00:00:45/3 = 15
    15 is not less than 15, fault cleared.
  • In the example above, the fault was cleared within 25 seconds of the last top-up, a fraction of three times the 15 seconds threshold (the threshold used to declare the fault). This is consistent with the goal of clearing the fault quickly if it appears as though the fault has been corrected. It could have been cleared even sooner, as fast as within 15 seconds, if the system time was compared to the newest recorded top-up instead of the oldest—but using more than one top-up time gives greater confidence that the fault has really been cleared.
  • It is to be understood that additional embodiments of the present invention described herein may be contemplated by one of ordinary skill in the art and that the scope of the present invention is not limited to the embodiments disclosed. While specific embodiments of the present invention have been illustrated and described, numerous modifications come to mind without significantly departing from the spirit of the invention, and the scope of protection is only limited by the scope of the accompanying claims.

Claims (21)

1.-17. (canceled)
18. A method of operating a negative pressure wound therapy device, the method comprising, by a controller of the negative pressure wound therapy device:
operating a source of negative pressure of the negative pressure wound therapy device in a first mode to provide negative pressure to a wound covered by a wound dressing, the source of negative pressure configured to be fluidically connected to the wound;
determining pressure at the wound;
comparing the pressure at the wound to a target negative pressure;
in response to determining that the target negative pressure has not been established at the wound, continue operating the source of negative pressure in the first mode; and
in response to determining that the target negative pressure has been established at the wound, operating the source of negative pressure in a second mode in which less power is consumed than in the first mode.
19. The method of claim 18, wherein operating the source of negative pressure in the first mode comprises cycling the source of negative pressure on and off to provide negative pressure to the wound.
20. The method of claim 18, further comprising, in the second mode, in response to determining that the pressure at the wound is more positive than the target negative pressure, activating the source of negative pressure.
21. The method of claim 20, further comprising activating the source of negative pressure for one cycle.
22. The method of claim 20, further comprising, in response to determining that the pressure at the wound is more positive than the target negative pressure, operating the source of negative pressure in the first mode.
23. The method of claim 18, further comprising, in the first mode, determining the pressure at the wound at a first sampling rate and, in the second mode, determining the pressure at the wound at a second sampling rate lower than the first sampling rate.
24. The method of claim 23, further comprising, by the controller, indicating a presence of a leak in response to determining that the source of negative pressure has been activated more than a threshold number of activations over a time period.
25. The method of claim 18, wherein determining the pressure at the wound comprises averaging a plurality of pressures at the wound.
26. The method of claim 25, wherein comparing the pressure at the wound to the target negative pressure comprises comparing the average pressure to the target negative pressure.
27. The method of claim 18, wherein the target negative pressure is between −40 mmHg to −125 mmHg.
28. A negative pressure wound therapy apparatus comprising:
a source of negative pressure configured to provide negative pressure to a wound covered by a wound dressing, the source of negative pressure configured to be fluidically connected to the wound;
a pressure sensor configured to determine pressure at the wound; and
a controller configured to:
operate the source of negative pressure in a first mode;
determine pressure at the wound;
compare the pressure at the wound to a target negative pressure;
in response to determining that the target negative pressure has not been established at the wound, continue operating the source of negative pressure in the first mode; and
in response to determining that the target negative pressure has been established at the wound, operate the source of negative pressure in a second mode in which less power is consumed than in the first mode.
29. The apparatus of claim 28, wherein the controller is further configured to:
operate the source of negative pressure in the first mode by cycling the source of negative pressure on and off to provide negative pressure to the wound.
30. The apparatus of claim 28, wherein the controller is further configured to:
in response to determining that the pressure at the wound is more positive than the target negative pressure in the second mode, activate the source of negative pressure.
31. The apparatus of claim 30, wherein the controller is further configured to:
activate the source of negative pressure for one cycle.
32. The apparatus of claim 30, wherein the controller is further configured to:
in response to determining that the pressure at the wound is more positive than the target negative pressure, operate the source of negative pressure in the first mode.
33. The apparatus of claim 28, wherein the controller is further configured to:
in the first mode, determine the pressure at the wound at a first sampling rate; and
in the second mode, determine the pressure at the wound at a second sampling rate lower than the first sampling rate.
34. The apparatus of claim 33, wherein the controller is further configured to:
indicate a presence of a leak in response to determining that the source of negative pressure has been activated more than a threshold number of activations over a time period.
35. The apparatus of claim 28, wherein the controller is further configured to:
determine the pressure at the wound by averaging a plurality of pressures at the wound.
36. The apparatus of claim 35, wherein comparing the pressure at the wound to the target negative pressure comprises comparing the average pressure to the target negative pressure.
37. The apparatus of claim 28, wherein the target negative pressure is between −40 mmHg to −125 mmHg.
US16/234,241 2011-05-26 2018-12-27 Method for providing negative pressure to a negative pressure wound therapy bandage Pending US20190192746A1 (en)

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Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0224986D0 (en) 2002-10-28 2002-12-04 Smith & Nephew Apparatus
US7753894B2 (en) 2004-04-27 2010-07-13 Smith & Nephew Plc Wound cleansing apparatus with stress
US9408954B2 (en) 2007-07-02 2016-08-09 Smith & Nephew Plc Systems and methods for controlling operation of negative pressure wound therapy apparatus
GB0723855D0 (en) 2007-12-06 2008-01-16 Smith & Nephew Apparatus and method for wound volume measurement
AU2009251802B2 (en) * 2008-05-27 2013-05-30 Smith & Nephew, Inc. Control unit with pump module for a negative pressure wound therapy device
GB201015656D0 (en) 2010-09-20 2010-10-27 Smith & Nephew Pressure control apparatus
WO2012051278A1 (en) 2010-10-12 2012-04-19 Tanis Kevin J Medical device
GB201108229D0 (en) 2011-05-17 2011-06-29 Smith & Nephew Tissue healing
JP2014516709A (en) 2011-05-24 2014-07-17 カリプト・メディカル・インコーポレイテッド Device with controller and pump module for providing a negative pressure for wound treatment
US9067003B2 (en) 2011-05-26 2015-06-30 Kalypto Medical, Inc. Method for providing negative pressure to a negative pressure wound therapy bandage
US9737649B2 (en) 2013-03-14 2017-08-22 Smith & Nephew, Inc. Systems and methods for applying reduced pressure therapy
US10328188B2 (en) 2013-03-14 2019-06-25 Smith & Nephew, Inc. Systems and methods for applying reduced pressure therapy
AU2014306876B2 (en) 2013-08-13 2019-05-02 Smith & Nephew, Inc. Systems and methods for applying reduced pressure therapy
US20180318476A1 (en) * 2014-12-22 2018-11-08 Smith & Nephew Plc Negative pressure wound therapy apparatus and methods
TWI641397B (en) * 2015-12-15 2018-11-21 雃博股份有限公司

Family Cites Families (386)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB114754A (en) 1918-04-18
US695270A (en) 1901-12-05 1902-03-11 George M Beringer Vaccine-shield.
US1480562A (en) 1922-11-03 1924-01-15 Mock Hugo Crumb collector
US2280915A (en) 1941-04-03 1942-04-28 John H Johnson Device for irrigating and treating wounds
US2568933A (en) 1942-07-04 1951-09-25 Cutler Hammer Inc Mounting and operating means for electric switches
US2367690A (en) 1943-07-31 1945-01-23 Edgar H Purdy Wound protector
GB641061A (en) 1947-09-06 1950-08-02 James Donald Maclaurin Improvements in method of treating wounds
US2632443A (en) 1949-04-18 1953-03-24 Eleanor P Lesher Surgical dressing
US2682873A (en) 1952-07-30 1954-07-06 Johnson & Johnson General purpose protective dressing
FR1163907A (en) 1956-10-25 1958-10-02 Apparatus for skin care
US3367332A (en) 1965-08-27 1968-02-06 Gen Electric Product and process for establishing a sterile area of skin
US3486504A (en) 1967-11-20 1969-12-30 Lawthan M Austin Jr Device for applying dressing,medication and suction
US3572340A (en) 1968-01-11 1971-03-23 Kendall & Co Suction drainage device
GB1224009A (en) 1968-07-25 1971-03-03 Beiersdorf Ag Wound dressings
US3610238A (en) 1970-04-28 1971-10-05 Us Health Education & Welfare Wound infection prevention device
US3874387A (en) 1972-07-05 1975-04-01 Pasquale P Barbieri Valved hemostatic pressure cap
USRE29319E (en) 1975-04-07 1977-07-26 Hollister Incorporated Drainage system for incisions or wounds in the body of an animal
ZA7602197B (en) 1975-04-15 1977-04-27 Int Paper Co Fluid evacuator
US3993080A (en) 1974-03-01 1976-11-23 Loseff Herbert S Suction tube and retrograde flushing for wounds, body cavities and the like
US4062012A (en) 1974-07-11 1977-12-06 The United States Of America As Represented By The Secretary Of The Navy Digital radar signal processor
US4058123A (en) 1975-10-01 1977-11-15 International Paper Company Combined irrigator and evacuator for closed wounds
US4102342A (en) 1975-12-29 1978-07-25 Taichiro Akiyama Valved device
GB1549756A (en) 1977-03-10 1979-08-08 Everett W Wound irrigating device
US4184510A (en) 1977-03-15 1980-01-22 Fibra-Sonics, Inc. Valued device for controlling vacuum in surgery
DE2721752C2 (en) 1977-05-13 1983-12-29 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
US4224945A (en) 1978-08-30 1980-09-30 Jonathan Cohen Inflatable expansible surgical pressure dressing
BR7908937A (en) 1978-12-06 1981-06-30 Svedman Paul Device for treating tissues, for example skin
US4250882A (en) 1979-01-26 1981-02-17 Medical Dynamics, Inc. Wound drainage device
US4219019A (en) 1979-02-07 1980-08-26 The Kendall Company Bandage
US5328614A (en) 1979-05-21 1994-07-12 Matsumura Kenneth N Methods and apparati for removing protein-bound molecules from body fluids
US5445604A (en) 1980-05-22 1995-08-29 Smith & Nephew Associated Companies, Ltd. Wound dressing with conformable elastomeric wound contact layer
US4316466A (en) 1980-06-27 1982-02-23 Biomedics, Inc. Body fluid drainage device
US4465485A (en) 1981-03-06 1984-08-14 Becton, Dickinson And Company Suction canister with unitary shut-off valve and filter features
US4468227A (en) 1981-05-29 1984-08-28 Hollister Incorporated Wound drainage device with resealable access cap
SE429197B (en) 1981-10-14 1983-08-22 Frese Nielsen Device for the treatment of wounds
DE3146266A1 (en) 1981-11-21 1983-06-01 Braun Melsungen Ag Combined device for a medical aspirator
US4534356A (en) 1982-07-30 1985-08-13 Diamond Shamrock Chemicals Company Solid state transcutaneous blood gas sensors
SE445298B (en) 1982-11-17 1986-06-16 Gunnar Pontus Em Swanbeck Device for cleaning and treating wounds and infected skin areas
US4795435A (en) 1983-02-25 1989-01-03 E. R. Squibb & Sons, Inc. Device for protecting a wound
SU1251912A1 (en) 1983-04-27 1986-08-23 Горьковский государственный медицинский институт им.С.М.Кирова Method of treatment of unformed fistula
DE3321151C2 (en) 1983-06-11 1986-09-18 Beck, Walter, Kuesnacht, Ch
US4778446A (en) 1983-07-14 1988-10-18 Squibb & Sons Inc Wound irrigation and/or drainage device
US4551141A (en) 1983-08-02 1985-11-05 Surgidyne Inc. Method and apparatus for removing liquids from a drainage device
US4573965A (en) 1984-02-13 1986-03-04 Superior Plastic Products Corp. Device for draining wounds
US4643641A (en) 1984-09-10 1987-02-17 Mici Limited Partnership Iv Method and apparatus for sterilization of a centrifugal pump
DE3441891C2 (en) 1984-11-16 1988-05-19 Walter Kuesnacht Ch Beck
US4655766A (en) 1985-08-01 1987-04-07 Alza Corporation Fluid imbibing pump with self-regulating skin patch
US4710165A (en) 1985-09-16 1987-12-01 Mcneil Charles B Wearable, variable rate suction/collection device
CH670049A5 (en) 1986-04-24 1989-05-12 Vebo
GB2195255B (en) 1986-09-30 1991-05-01 Vacutec Uk Limited Apparatus for vacuum treatment of an epidermal surface
AT87838T (en) 1987-01-20 1993-04-15 Medinorm Ag Device for suction of wundfluessigkeiten.
US4778456A (en) 1987-04-03 1988-10-18 Oddvin Lokken Method of sterilizing an operating field and sterilized cassette therefor
US5176663A (en) 1987-12-02 1993-01-05 Pal Svedman Dressing having pad with compressibility limiting elements
US4921488A (en) 1988-01-15 1990-05-01 Maitz Carlos A Aspirator device for body fluids
US4950483A (en) 1988-06-30 1990-08-21 Collagen Corporation Collagen wound healing matrices and process for their production
US4972829A (en) 1988-11-23 1990-11-27 Knerr Richard P Air cure bandage
US4994022A (en) 1989-02-02 1991-02-19 Stryker Corporation Blood conservation system
US5100396A (en) 1989-04-03 1992-03-31 Zamierowski David S Fluidic connection system and method
US5527293A (en) 1989-04-03 1996-06-18 Kinetic Concepts, Inc. Fastening system and method
US4969880A (en) 1989-04-03 1990-11-13 Zamierowski David S Wound dressing and treatment method
US5261893A (en) 1989-04-03 1993-11-16 Zamierowski David S Fastening system and method
US5056510A (en) 1989-04-13 1991-10-15 The Kendall Company Vented wound dressing
SE8902498A (en) 1989-07-11 1990-07-09
US5358494A (en) 1989-07-11 1994-10-25 Svedman Paul Irrigation dressing
US4979944A (en) 1989-08-21 1990-12-25 The Pullman Company Surgical vacuum evacuation device
DE3935818A1 (en) 1989-10-27 1991-05-02 Wolfgang Dr Neher Washing appts. for infected wound - consists of cap fitted with nozzle for spraying cleansing solution
US5152757A (en) 1989-12-14 1992-10-06 Brigham And Women's Hospital System for diagnosis and treatment of wounds
US5215519A (en) 1990-03-07 1993-06-01 Shettigar U Ramakrishna Autotransfusion membrane system with means for providing reverse filtration
US5055198A (en) 1990-03-07 1991-10-08 Shettigar U Ramakrishna Autologous blood recovery membrane system and method
IT1240136B (en) 1990-03-19 1993-11-27 Marelli Autronica An ignition system for an internal combustion engine
DE4012232A1 (en) 1990-04-14 1991-10-17 Franz Josef Gross Dressing for deep wounds - has main sheet applied to skin with centre hole over wound, fed and drainage tubes with perforated ends at wound, and overall cover film
AU658845B2 (en) 1990-08-20 1995-05-04 Abbott Laboratories Medical drug formulation and delivery system
GB9027422D0 (en) 1990-12-18 1991-02-06 Scras Osmotically driven infusion device
US5149331A (en) 1991-05-03 1992-09-22 Ariel Ferdman Method and device for wound closure
DE69232589T2 (en) 1991-10-23 2002-12-05 Holdings L L C Patent Wound dressing system
US5645081A (en) 1991-11-14 1997-07-08 Wake Forest University Method of treating tissue damage and apparatus for same
US5636643A (en) 1991-11-14 1997-06-10 Wake Forest University Wound treatment employing reduced pressure
US7198046B1 (en) 1991-11-14 2007-04-03 Wake Forest University Health Sciences Wound treatment employing reduced pressure
US5167613A (en) 1992-03-23 1992-12-01 The Kendall Company Composite vented wound dressing
US5266928A (en) 1992-05-29 1993-11-30 Johnson Lonnie G Wet diaper detector
US6465708B1 (en) 1992-06-19 2002-10-15 Augustine Medical, Inc. Covering
US5964723A (en) 1992-06-19 1999-10-12 Augustine Medical, Inc. Normothermic tissue heating wound covering
US6406448B1 (en) 1992-06-19 2002-06-18 Augustine Medical, Inc. Normothermic heater covering for tissue treatment
US5678564A (en) 1992-08-07 1997-10-21 Bristol Myers Squibb Liquid removal system
GB2272645B8 (en) 1992-11-23 2010-02-10 Johnson & Johnson Medical Wound dressing
US5616121A (en) 1993-08-17 1997-04-01 Mckay; Douglas W. Method for alleviating pain in a wound
US5437651A (en) 1993-09-01 1995-08-01 Research Medical, Inc. Medical suction apparatus
EP0642779A1 (en) 1993-09-13 1995-03-15 E.R. Squibb &amp; Sons, Inc. Wound filler
US5380280A (en) 1993-11-12 1995-01-10 Peterson; Erik W. Aspiration system having pressure-controlled and flow-controlled modes
GB9400994D0 (en) 1994-01-20 1994-03-16 Squibb Bristol Myers Co Wound dressing
US5549584A (en) 1994-02-14 1996-08-27 The Kendall Company Apparatus for removing fluid from a wound
US5701917A (en) 1994-03-30 1997-12-30 Khouri Biomedical Research, Inc. Method and apparatus for promoting soft tissue enlargement and wound healing
ZA9506968B (en) 1994-08-22 1996-03-29 Kinetic Concepts Inc Wound drainage equipment
DE4433450A1 (en) 1994-09-20 1996-03-21 Wim Dr Med Fleischmann An apparatus for sealing a wound area
US5489280A (en) 1994-10-31 1996-02-06 Zimmer, Inc. Surgical preparation solution applicator
US6110197A (en) 1994-11-21 2000-08-29 Augustine Medical, Inc. Flexible non-contact wound treatment device with a single joint
US5643189A (en) 1994-12-07 1997-07-01 Masini; Michael A. Composite wound dressing including inversion means
US6225523B1 (en) 1994-12-07 2001-05-01 Masini Michael A Invertible wound dressings and method of making the same
US6599262B1 (en) 1994-12-07 2003-07-29 Masini Michael A Bandage with thermal insert
US5733337A (en) 1995-04-07 1998-03-31 Organogenesis, Inc. Tissue repair fabric
US5562107A (en) 1995-09-27 1996-10-08 Hollister Incorporated Reclosable wound cover
GB9523253D0 (en) 1995-11-14 1996-01-17 Mediscus Prod Ltd Portable wound treatment apparatus
US5857502A (en) 1995-11-22 1999-01-12 Millburn Marketing Associates Packaging system for concentrated materials
US5868933A (en) 1995-12-15 1999-02-09 Patrick; Gilbert Antimicrobial filter cartridge
US5785688A (en) 1996-05-07 1998-07-28 Ceramatec, Inc. Fluid delivery apparatus and method
US5798266A (en) 1996-08-27 1998-08-25 K-Quay Enterprises, Llc Methods and kits for obtaining and assaying mammary fluid samples for breast diseases, including cancer
US6673028B1 (en) 1996-09-26 2004-01-06 Wake Forest University Health Sciences Passive joint movement device and method for using the same
US6092992A (en) 1996-10-24 2000-07-25 Imblum; Gregory G. System and method for pump control and fault detection
TW501934B (en) 1996-11-20 2002-09-11 Tapic Int Co Ltd Collagen material and process for making the same
DE19722075C1 (en) 1997-05-27 1998-10-01 Wilhelm Dr Med Fleischmann Medication supply to open wounds
US7759538B2 (en) 1997-05-27 2010-07-20 Wilhelm Fleischmann Process and device for application of active substances to a wound surface
US5876611A (en) 1997-06-16 1999-03-02 Shettigar; U. Ramakrishna Intraoperative blood salvaging system and method
NL1006457C2 (en) 1997-07-03 1999-01-05 Polymedics N V A drainage system to be applied to an open wound, hereby used element for placing a drainage tube or hose, and a method for using the drainage system.
US7214202B1 (en) 1997-07-28 2007-05-08 Kci Licensing, Inc. Therapeutic apparatus for treating ulcers
US6135116A (en) 1997-07-28 2000-10-24 Kci Licensing, Inc. Therapeutic method for treating ulcers
US5843011A (en) 1997-08-11 1998-12-01 Lucas; Gregory Self adhesive bandage roll
US6402724B1 (en) 1997-09-09 2002-06-11 Wolfe Tory Medical, Inc. Wound irrigation shield
GB9719520D0 (en) 1997-09-12 1997-11-19 Kci Medical Ltd Surgical drape and suction heads for wound treatment
EP1051451B1 (en) 1998-01-30 2004-03-31 Coloplast A/S An article having a surface showing adhesive properties
US6071267A (en) 1998-02-06 2000-06-06 Kinetic Concepts, Inc. Medical patient fluid management interface system and method
US5989222A (en) 1998-06-12 1999-11-23 Abbott Laboratories Pressure (occlusion) sensor
US6458109B1 (en) 1998-08-07 2002-10-01 Hill-Rom Services, Inc. Wound treatment apparatus
US6168800B1 (en) 1998-08-20 2001-01-02 Medwrap Corporation Antimcrobial multi-layer island dressing
DE19844355A1 (en) 1998-09-28 2000-04-06 Rainer E Sachse Adhesive wound dressing of flexible, membrane like material penetrable by air comprises integrated device which drains wound secretions or produces reduced pressure, or can be connected to an external suction system
US6103951A (en) 1998-10-13 2000-08-15 Freeman; Frank Releasable wound dressing for efficient removal of exuded fluid
GB9822341D0 (en) 1998-10-13 1998-12-09 Kci Medical Ltd Negative pressure therapy using wall suction
US6767334B1 (en) 1998-12-23 2004-07-27 Kci Licensing, Inc. Method and apparatus for wound treatment
US6176307B1 (en) 1999-02-08 2001-01-23 Union Oil Company Of California Tubing-conveyed gravel packing tool and method
US6254567B1 (en) 1999-02-26 2001-07-03 Nxstage Medical, Inc. Flow-through peritoneal dialysis systems and methods with on-line dialysis solution regeneration
BR0009511A (en) 1999-04-02 2004-06-08 Kinetic Concepts Inc combination therapy to promote wound healing in breast
US20070014837A1 (en) 1999-04-02 2007-01-18 Kci Licensing, Inc. System and method for use of agent in combination with subatmospheric pressure tissue treatment
US6994702B1 (en) 1999-04-06 2006-02-07 Kci Licensing, Inc. Vacuum assisted closure pad with adaptation for phototherapy
CA2367460C (en) 1999-04-09 2009-07-14 Kci Licensing, Inc. Wound therapy device
US6695823B1 (en) 1999-04-09 2004-02-24 Kci Licensing, Inc. Wound therapy device
GB9909301D0 (en) 1999-04-22 1999-06-16 Kci Medical Ltd Wound treatment apparatus employing reduced pressure
US6261283B1 (en) 1999-08-31 2001-07-17 Alcon Universal Ltd. Liquid venting surgical system and cassette
SE9903331D0 (en) 1999-09-16 1999-09-16 Gambro Lundia Ab Method and Apparatus for sterilizing a heat sensitive fluid
US6998509B1 (en) 1999-10-07 2006-02-14 Coloplast A/S Wound care device
GB9926538D0 (en) 1999-11-09 2000-01-12 Kci Medical Ltd Multi-lumen connector
US6824533B2 (en) 2000-11-29 2004-11-30 Hill-Rom Services, Inc. Wound treatment apparatus
US6764462B2 (en) 2000-11-29 2004-07-20 Hill-Rom Services Inc. Wound treatment apparatus
EP1977776B1 (en) 1999-11-29 2016-02-10 KCI Medical Resources Wound treatment apparatus
US6794554B2 (en) 2000-02-01 2004-09-21 Ferris Pharmaceuticals, Inc. Wound packing material
US6977323B1 (en) 2000-02-17 2005-12-20 3M Innovative Properties Company Foam-on-film medical articles
AU4565001A (en) 2000-03-10 2001-09-24 Ana Gen Technologies Inc Mutation detection using denaturing gradients
GB0011202D0 (en) 2000-05-09 2000-06-28 Kci Licensing Inc Abdominal wound dressing
NL1015146C2 (en) 2000-05-10 2001-11-13 Two Beats B V An apparatus for treating a wound in the skin of a patiÙnt.
US6471685B1 (en) 2000-05-18 2002-10-29 David James Johnson Medical dressing assembly and associated method of using the same
MXPA02011416A (en) 2000-05-22 2004-08-12 Arthur C Coffey Combination sis and vacuum bandage and method.
US6856821B2 (en) 2000-05-26 2005-02-15 Kci Licensing, Inc. System for combined transcutaneous blood gas monitoring and vacuum assisted wound closure
IL137689D0 (en) 2000-08-03 2001-10-31 L R Res & Dev Ltd System for enhanced chemical debridement
US6787679B1 (en) 2000-10-12 2004-09-07 Joy L. Cantor Scented adhesive bandage
US6685681B2 (en) 2000-11-29 2004-02-03 Hill-Rom Services, Inc. Vacuum therapy and cleansing dressing for wounds
US6855135B2 (en) 2000-11-29 2005-02-15 Hill-Rom Services, Inc. Vacuum therapy and cleansing dressing for wounds
US7700819B2 (en) 2001-02-16 2010-04-20 Kci Licensing, Inc. Biocompatible wound dressing
US7070584B2 (en) 2001-02-20 2006-07-04 Kci Licensing, Inc. Biocompatible wound dressing
US7799004B2 (en) 2001-03-05 2010-09-21 Kci Licensing, Inc. Negative pressure wound treatment apparatus and infection identification system and method
US6450773B1 (en) 2001-03-13 2002-09-17 Terabeam Corporation Piezoelectric vacuum pump and method
US6695824B2 (en) 2001-04-16 2004-02-24 The United States Of America As Represented By The Secretary Of The Army Wound dressing system
US7108683B2 (en) 2001-04-30 2006-09-19 Kci Licensing, Inc Wound therapy and tissue management system and method with fluid differentiation
US7645269B2 (en) 2001-04-30 2010-01-12 Kci Licensing, Inc. Gradient wound treatment system and method
US20020180608A1 (en) 2001-05-04 2002-12-05 Sphericon Ltd. Driver alertness monitoring system
WO2002092783A2 (en) 2001-05-15 2002-11-21 Children's Medical Center Corporation Methods and apparatus for application of micro-mechanical forces to tissues
US6491684B1 (en) 2001-05-22 2002-12-10 Durect Corporation Fluid delivery device having a water generating electrochemical/chemical pump and associated method
US6866994B2 (en) 2001-05-30 2005-03-15 Neomatrix, Llc Noninvasive intraductal fluid diagnostic screen
GB0115054D0 (en) 2001-06-20 2001-08-15 Recuperatio Ltd Fluid transfer device
US7002054B2 (en) 2001-06-29 2006-02-21 The Procter & Gamble Company Absorbent article having a fever indicator
AU2002316630A1 (en) 2001-07-12 2003-01-29 Hill-Rom Services, Inc. Control of vacuum level rate of change
US20030021775A1 (en) 2001-07-27 2003-01-30 Ramot University Authority For Applied Research & Industrial Development Ltd. Device for and method of controlled enzymatic removal and retrieval of tissue
US7364565B2 (en) 2001-07-27 2008-04-29 Ramot At Tel Aviv University Ltd. Controlled enzymatic removal and retrieval of cells
US7004915B2 (en) 2001-08-24 2006-02-28 Kci Licensing, Inc. Negative pressure assisted tissue treatment system
US8426670B2 (en) 2001-09-19 2013-04-23 Nippon Shokubai Co., Ltd. Absorbent structure, absorbent article, water-absorbent resin, and its production process and evaluation method
GB2380135B (en) 2001-09-27 2005-01-12 Johnson & Johnson Medical Ltd Therapeutic wound dressing
EP1450878A1 (en) 2001-10-11 2004-09-01 Hill-Rom Services, Inc. Waste container for negative pressure therapy
US20030125649A1 (en) 2001-10-31 2003-07-03 Mcintosh Laura Janet Method and system apparatus using temperature and pressure for treating medical disorders
US6787682B2 (en) 2001-11-05 2004-09-07 Hollister Incorporated Absorbent foam wound dressing
US6960179B2 (en) 2001-11-16 2005-11-01 National Quality Care, Inc Wearable continuous renal replacement therapy device
US7645253B2 (en) 2001-11-16 2010-01-12 National Quality Care, Inc. Wearable ultrafiltration device
US6648862B2 (en) 2001-11-20 2003-11-18 Spheric Products, Ltd. Personally portable vacuum desiccator
WO2003043553A1 (en) 2001-11-23 2003-05-30 Coloplast A/S A wound dressing
JP3973886B2 (en) 2001-11-29 2007-09-12 岡本レース株式会社 Sericin extraction method, modification processing method of the extract and the fiber or fabric
US7195624B2 (en) 2001-12-26 2007-03-27 Hill-Rom Services, Inc. Vented vacuum bandage with irrigation for wound healing and method
DE60225480T2 (en) 2001-12-26 2009-03-19 Hill-Rom Services, Inc., Batesville Vacuum packing bandages
WO2003057307A1 (en) 2001-12-26 2003-07-17 Hill-Rom Services, Inc. Wound vacuum therapy dressing kit
AU2003211461C1 (en) 2002-03-04 2008-10-23 New X-National Technology K.K. Closed cell culture system
US20030212357A1 (en) 2002-05-10 2003-11-13 Pace Edgar Alan Method and apparatus for treating wounds with oxygen and reduced pressure
AU2003231886A1 (en) 2002-05-13 2003-11-11 Salviac Limited Retrieval catheter for an embolic filter
US20030225347A1 (en) 2002-06-03 2003-12-04 Argenta Louis C. Directed tissue growth employing reduced pressure
JP2005536275A (en) 2002-08-21 2005-12-02 ヒル−ロム サービシズ,インコーポレイテッド Wound packing for preventing wound closure
US7381211B2 (en) 2002-08-21 2008-06-03 Kci Licensing, Inc. Medical closure screen device and method
US20040039391A1 (en) 2002-08-23 2004-02-26 Argenta Louis C. Bone treatment employing reduced pressure
US20040122434A1 (en) 2002-08-23 2004-06-24 Argenta Louis C. Bone treatment employing reduced pressure
US7846141B2 (en) 2002-09-03 2010-12-07 Bluesky Medical Group Incorporated Reduced pressure treatment system
AU2003272310A1 (en) 2002-09-11 2004-04-30 The Cleveland Clinic Foundation Ultrafiltration membrane, device, bioartificial organ and methods
US6979324B2 (en) 2002-09-13 2005-12-27 Neogen Technologies, Inc. Closed wound drainage system
US7815616B2 (en) 2002-09-16 2010-10-19 Boehringer Technologies, L.P. Device for treating a wound
US7625362B2 (en) 2003-09-16 2009-12-01 Boehringer Technologies, L.P. Apparatus and method for suction-assisted wound healing
GB0224986D0 (en) 2002-10-28 2002-12-04 Smith & Nephew Apparatus
US7814932B2 (en) * 2002-12-18 2010-10-19 David Stinson Digital pressure gauge
AU2003294368B2 (en) 2002-12-31 2009-01-22 Bsn Medical Gmbh Wound dressing
US6951553B2 (en) 2002-12-31 2005-10-04 Kci Licensing, Inc Tissue closure treatment system and method with externally-applied patient interface
US7976519B2 (en) 2002-12-31 2011-07-12 Kci Licensing, Inc. Externally-applied patient interface system and method
GB0300625D0 (en) 2003-01-10 2003-02-12 Squibb Bristol Myers Co Wound dressing
US8353857B2 (en) 2003-06-23 2013-01-15 Codman & Shurtleff, Inc. Implantable medical device having pressure sensors for diagnosing the performance of an implanted medical device
MXPA06000740A (en) 2003-07-22 2006-03-30 Kci Licensing Inc Negative pressure wound treatment dressing.
US20050033211A1 (en) 2003-08-08 2005-02-10 Samuel Scheinberg Friction reducing bandage
US7361184B2 (en) 2003-09-08 2008-04-22 Joshi Ashok V Device and method for wound therapy
NL1025938C2 (en) 2003-09-17 2005-03-18 Broockeville Corp N V Wound Drainage device.
US7118545B2 (en) 2003-10-14 2006-10-10 Boyde Sandra M Wound dressing retainer and fastening device
GB0325120D0 (en) 2003-10-28 2003-12-03 Smith & Nephew Apparatus with actives
GB0325130D0 (en) 2003-10-28 2003-12-03 Smith & Nephew Apparatus with scaffold
GB0325126D0 (en) 2003-10-28 2003-12-03 Smith & Nephew Apparatus with heat
GB0325129D0 (en) 2003-10-28 2003-12-03 Smith & Nephew Apparatus in situ
US7128735B2 (en) 2004-01-02 2006-10-31 Richard Scott Weston Reduced pressure wound treatment appliance
JP4660171B2 (en) 2004-02-05 2011-03-30 阿蘇製薬株式会社 First aid bandage
GB2429161B (en) 2004-02-13 2008-12-24 Squibb Bristol Myers Co Multi layered wound dressing
GB0403969D0 (en) 2004-02-24 2004-03-31 Huntleigh Technology Plc Tissue treatment device
US8100887B2 (en) 2004-03-09 2012-01-24 Bluesky Medical Group Incorporated Enclosure-based reduced pressure treatment system
US10058642B2 (en) 2004-04-05 2018-08-28 Bluesky Medical Group Incorporated Reduced pressure treatment system
US7776028B2 (en) 2004-04-05 2010-08-17 Bluesky Medical Group Incorporated Adjustable overlay reduced pressure wound treatment system
US7708724B2 (en) 2004-04-05 2010-05-04 Blue Sky Medical Group Incorporated Reduced pressure wound cupping treatment system
US7790945B1 (en) 2004-04-05 2010-09-07 Kci Licensing, Inc. Wound dressing with absorption and suction capabilities
US7909805B2 (en) 2004-04-05 2011-03-22 Bluesky Medical Group Incorporated Flexible reduced pressure treatment appliance
US7753894B2 (en) 2004-04-27 2010-07-13 Smith & Nephew Plc Wound cleansing apparatus with stress
GB0409444D0 (en) 2004-04-28 2004-06-02 Smith & Nephew Apparatus
GB0409443D0 (en) 2004-04-28 2004-06-02 Smith & Nephew Apparatus
GB0409446D0 (en) 2004-04-28 2004-06-02 Smith & Nephew Apparatus
US7998125B2 (en) 2004-05-21 2011-08-16 Bluesky Medical Group Incorporated Hypobaric chamber treatment system
US8062272B2 (en) 2004-05-21 2011-11-22 Bluesky Medical Group Incorporated Flexible reduced pressure treatment appliance
US8961461B2 (en) 2004-05-27 2015-02-24 Baxter International Inc. Multi-state alarm system for a medical pump
GB2415908A (en) 2004-07-09 2006-01-11 Ethicon Inc Vacuum wound dressings
US7612247B2 (en) 2004-09-29 2009-11-03 Oyaski Michael F Wound alternative treatment system
US20060069365A1 (en) 2004-09-30 2006-03-30 Sperl Michael D Absorbent composite having selective regions for improved attachment
US20060083623A1 (en) 2004-10-08 2006-04-20 Mark Higgins Compression pump system
US7717313B2 (en) 2004-10-18 2010-05-18 Tyco Healthcare Group Lp Surgical apparatus and structure for applying sprayable wound treatment material
GB0424046D0 (en) 2004-10-29 2004-12-01 Smith & Nephew Apparatus
DE202004017052U1 (en) 2004-11-02 2005-06-09 Riesinger, Birgit Device for treatment of wounds using reduced pressure
SI1807145T1 (en) 2004-11-05 2016-05-31 ConvaTec Technologies Inv. Vacuum wound dressing
US7485112B2 (en) 2004-11-08 2009-02-03 Boehringer Technologies, L.P. Tube attachment device for wound treatment
DE202004018245U1 (en) 2004-11-24 2005-07-07 Riesinger, Birgit Drainage device for treating wounds using reduced pressure has absorption body with layer(s) of textile section enriched with super-absorbents enclosed by liquid transmissive sleeve; absorbed wound secretions remain in absorption body
DE102005007016A1 (en) 2005-02-15 2006-08-24 Fleischmann, Wilhelm, Dr.med. Device for treatment of wounds
GB0506308D0 (en) 2005-03-29 2005-05-04 Taylor Michael Bandage pressure monitor
GB0508531D0 (en) 2005-04-27 2005-06-01 Smith & Nephew Sai with ultrasound
GB0508529D0 (en) 2005-04-27 2005-06-01 Smith & Nephew Sai with microstress
GB0508528D0 (en) 2005-04-27 2005-06-01 Smith & Nephew SAI with macrostress
CA2611492C (en) 2005-06-10 2014-05-13 The Ohio Willow Wood Company Prosthetic device utilizing electric vacuum pump
KR20140033248A (en) 2005-06-27 2014-03-17 스미쓰 앤드 네퓨 피엘씨 Antimicrobial biguanide metal complexes
US7931630B2 (en) 2005-07-05 2011-04-26 C. R. Bard, Inc. Multi-functional and modular urine collection system
US7857806B2 (en) 2005-07-14 2010-12-28 Boehringer Technologies, L.P. Pump system for negative pressure wound therapy
US20110077605A1 (en) 2005-07-14 2011-03-31 Boehringer Technologies, L.P. Pump system for negative pressure wound therapy
US7438705B2 (en) 2005-07-14 2008-10-21 Boehringer Technologies, L.P. System for treating a wound with suction and method detecting loss of suction
CA2614794C (en) 2005-07-24 2014-02-18 Carmeli Adahan Wound closure and drainage system
US7837673B2 (en) 2005-08-08 2010-11-23 Innovative Therapies, Inc. Wound irrigation device
WO2007024230A1 (en) 2005-08-26 2007-03-01 Spheric Products, Ltd. Chest tube drainage system
CA2949821A1 (en) 2005-09-06 2007-03-15 Smith & Nephew, Inc. Self contained wound dressing with micropump
JP2009506877A (en) 2005-09-07 2009-02-19 タイコ ヘルスケア グループ リミテッド パートナーシップ Wound dressing having a vacuum reservoir
EP2708216B1 (en) 2005-09-07 2016-04-06 Smith & Nephew, Inc. Self contained wound dressing apparatus
GB0518804D0 (en) 2005-09-15 2005-10-26 Smith & Nephew Exudialysis tissue cleanser
GB0518826D0 (en) 2005-09-15 2005-10-26 Smith & Nephew Apparatus with actives from tissue - exudialysis
GB0518825D0 (en) 2005-09-15 2005-10-26 Smith & Nephew Apparatus with actives from tissue - sai
DK2010245T3 (en) 2005-11-21 2016-01-18 Joshua David Smith Wound Care System
US8025052B2 (en) 2005-11-21 2011-09-27 Ric Investments, Llc System and method of monitoring respiratory events
DE202005019670U1 (en) 2005-12-14 2006-04-27 Riesinger, Birgit Wound treatment device with elastically deformable vacuum producing element
US7896823B2 (en) 2006-01-17 2011-03-01 Theranova, Llc Method and apparatus for treating wound using negative pressure therapy
US7503910B2 (en) 2006-02-01 2009-03-17 Carmeli Adahan Suctioning system, method and kit
EP1981561A1 (en) 2006-02-02 2008-10-22 Coloplast A/S Device, pump and system for stimulating the healing of a wound
CA2635697A1 (en) 2006-02-02 2007-08-09 Coloplast A/S A suction system
JP5263882B2 (en) 2006-02-07 2013-08-14 コビディエン・リミテッド・パートナーシップCovidien Lp Surgical wound dressing
US8852149B2 (en) 2006-04-06 2014-10-07 Bluesky Medical Group, Inc. Instructional medical treatment system
US7779625B2 (en) 2006-05-11 2010-08-24 Kalypto Medical, Inc. Device and method for wound therapy
US7615036B2 (en) 2006-05-11 2009-11-10 Kalypto Medical, Inc. Device and method for wound therapy
US8025650B2 (en) 2006-06-12 2011-09-27 Wound Care Technologies, Inc. Negative pressure wound treatment device, and methods
SE0601536A (en) 2006-07-11 2008-01-12 Moelnlycke Health Care Ab Spolförband
GB0712735D0 (en) 2006-07-26 2007-08-08 Smith & Nephew Dressing
US7858838B2 (en) 2006-08-10 2010-12-28 3M Innovative Properties Company Conformable wound dressing
US7876546B2 (en) * 2006-09-19 2011-01-25 Kci Licensing Inc. Component module for a reduced pressure treatment system
US7862339B2 (en) 2006-09-21 2011-01-04 Tyco Healthcare Group Lp Negative wound pressure therapy test system
WO2008039223A1 (en) * 2006-09-26 2008-04-03 Boehringer Technologies L.P. Pump system for negative pressure wound therapy
US8641691B2 (en) 2006-09-28 2014-02-04 Smith & Nephew, Inc. Portable wound therapy system
EP2079507B1 (en) 2006-10-13 2016-11-23 KCI Licensing, Inc. Reduced pressure delivery system having a manually-activated pump for providing treatment to low-severity wounds
ES2564519T3 (en) 2006-10-13 2016-03-23 Bluesky Medical Group Inc. Pressure control medical vacuum pump
CA2666797C (en) 2006-10-17 2017-06-20 Bluesky Medical Group Inc. Auxiliary powered negative pressure wound therapy apparatuses and methods
US8377016B2 (en) 2007-01-10 2013-02-19 Wake Forest University Health Sciences Apparatus and method for wound treatment employing periodic sub-atmospheric pressure
KR101217918B1 (en) 2007-02-09 2013-01-02 케이씨아이 라이센싱 인코포레이티드 Apparatus and method for managing reduced pressure at a tissue site
CA2675263C (en) 2007-02-20 2012-01-03 Kci Licensing Inc. System and method for distinguishing leaks from a disengaged canister condition in a reduced pressure treatment system
CA2581698A1 (en) 2007-03-14 2008-09-14 Canica Design Inc. Viscera protector
US8057411B2 (en) 2007-04-25 2011-11-15 General Patent, Llc Wound care vacuum bandaging in combination with acoustic shock wave applications
EP2152333B1 (en) 2007-05-07 2012-10-17 Carmeli Adahan Suction system
US7794426B2 (en) 2007-05-21 2010-09-14 Asante Solutions, Inc. Infusion pump system with contamination-resistant features
GB0710846D0 (en) 2007-06-06 2007-07-18 Squibb Bristol Myers Co A wound dressing
SE531259C2 (en) 2007-06-27 2009-02-03 Moelnlycke Health Care Ab Device for treating wounds with reduced pressure
GB0712759D0 (en) 2007-07-02 2007-08-08 Smith & Nephew Measuring pressure
US9408954B2 (en) 2007-07-02 2016-08-09 Smith & Nephew Plc Systems and methods for controlling operation of negative pressure wound therapy apparatus
GB0712760D0 (en) 2007-07-02 2007-08-08 Smith & Nephew Status indication
GB0712764D0 (en) 2007-07-02 2007-08-08 Smith & Nephew Carrying Bag
GB0712757D0 (en) 2007-07-02 2007-08-08 Smith & Nephew Pressure control
GB0712739D0 (en) 2007-07-02 2007-08-08 Smith & Nephew Apparatus
US7790946B2 (en) 2007-07-06 2010-09-07 Tyco Healthcare Group Lp Subatmospheric pressure wound therapy dressing
US20100036333A1 (en) 2008-08-06 2010-02-11 Schenk Iii Albert A Fluid level sensor for a container of a negative pressure wound treatment system
GB0715211D0 (en) 2007-08-06 2007-09-12 Smith & Nephew Apparatus
GB0715264D0 (en) 2007-08-06 2007-09-12 Smith & Nephew Determining flow rate
GB0715259D0 (en) 2007-08-06 2007-09-12 Smith & Nephew Canister status determination
RU2010102860A (en) 2007-08-21 2011-09-27 КейСиАй Лайсензинг Инк. (US) low pressure system and method that use a gasket
WO2009047524A2 (en) 2007-10-10 2009-04-16 Talley Group Limited Medical apparatus for use in negative pressure wound therapy
WO2009049232A1 (en) 2007-10-11 2009-04-16 Spiracur, Inc. Closed incision negative pressure wound therapy device and methods of use
MX2010004377A (en) 2007-10-23 2010-10-25 Boehringer Technologies Lp Thin film wound cover andsuction assisted wound treatment system using the same.
TWI340653B (en) 2007-11-09 2011-04-21 Ind Tech Res Inst Detachable pump and the negative pressure wound therapy system using the same
EP3360519A1 (en) 2007-11-21 2018-08-15 Smith & Nephew PLC Wound dressing
ES2555204T3 (en) 2007-11-21 2015-12-29 T.J. Smith & Nephew Limited Suction device and sell
GB0722820D0 (en) 2007-11-21 2008-01-02 Smith & Nephew Vacuum assisted wound dressing
EP2214612B1 (en) 2007-11-21 2019-05-01 Smith & Nephew PLC Wound dressing
JP5976991B2 (en) 2007-12-04 2016-08-24 コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. A method of operating a medical device
GB0723855D0 (en) 2007-12-06 2008-01-16 Smith & Nephew Apparatus and method for wound volume measurement
GB0723876D0 (en) 2007-12-06 2008-01-16 Smith & Nephew Apparatus and method for topical negative pressure therapy
GB0724564D0 (en) 2007-12-18 2008-01-30 Smith & Nephew Portable wound therapy apparatus and method
CA2711620A1 (en) 2008-01-08 2009-07-16 Bluesky Medical Group Inc. Sustained variable negative pressure wound treatment and method of controlling same
JP5243560B2 (en) 2008-02-27 2013-07-24 ケーシーアイ ライセンシング インコーポレイテッド System and method for treating a wound at a tissue site
US8449508B2 (en) 2008-03-05 2013-05-28 Kci Licensing, Inc. Dressing and method for applying reduced pressure to and collecting and storing fluid from a tissue site
KR101615395B1 (en) 2008-03-05 2016-04-25 케이씨아이 라이센싱 인코포레이티드 Dressing and method for applying reduced pressure to and collecting and storing fluid from a tissue site
US9033942B2 (en) 2008-03-07 2015-05-19 Smith & Nephew, Inc. Wound dressing port and associated wound dressing
US9199012B2 (en) 2008-03-13 2015-12-01 Smith & Nephew, Inc. Shear resistant wound dressing for use in vacuum wound therapy
US20090234306A1 (en) 2008-03-13 2009-09-17 Tyco Healthcare Group Lp Vacuum wound therapy wound dressing with variable performance zones
US20090240218A1 (en) 2008-03-20 2009-09-24 Tyco Healthcare Group Lp Wound Therapy System
EP2277127B1 (en) 2008-04-01 2018-12-26 Smiths Medical ASD, Inc. Software features for medical infusion pump
JP2011516170A (en) 2008-04-04 2011-05-26 スリーエム イノベイティブ プロパティズ カンパニー Medical care provided with a valve supplies and kits containing the same
JP2011516167A (en) 2008-04-04 2011-05-26 スリーエム イノベイティブ プロパティズ カンパニー Wound dressing with a micropump
US7825289B2 (en) 2008-05-16 2010-11-02 Tyco Healthcare Group Lp Wound dressing adhesive compression device
AU2009250802B2 (en) 2008-05-21 2015-07-16 Moris Topaz Wound healing device
US8048046B2 (en) 2008-05-21 2011-11-01 Tyco Healthcare Group Lp Wound therapy system with housing and canister support
US20090299251A1 (en) 2008-05-27 2009-12-03 John Buan Negative pressure wound therapy device
AU2009251802B2 (en) 2008-05-27 2013-05-30 Smith & Nephew, Inc. Control unit with pump module for a negative pressure wound therapy device
AU2009262880B2 (en) 2008-05-30 2012-09-13 Kci Licensing, Inc. See-through, reduced-pressure dressings and systems
US8480641B2 (en) 2008-06-13 2013-07-09 Premco Medical Systems, Inc. Negative pressure wound treatment apparatus and method
US8257326B2 (en) 2008-06-30 2012-09-04 Tyco Healthcare Group Lp Apparatus for enhancing wound healing
EP2300069B1 (en) 2008-07-08 2017-12-13 Smith & Nephew, Inc Portable negative pressure wound therapy device
US20100036367A1 (en) 2008-08-05 2010-02-11 Bluesky Medical Group, Inc. Wound overlay with cuff for wound treatment employing reduced pressure
AU2009279525B2 (en) 2008-08-08 2015-04-09 Smith & Nephew Inc. Wound dressing of continuous fibers
US9414968B2 (en) 2008-09-05 2016-08-16 Smith & Nephew, Inc. Three-dimensional porous film contact layer with improved wound healing
GB0817041D0 (en) 2008-09-17 2008-10-22 Smith & Nephew Power generation
CN102143770B (en) 2008-09-18 2015-08-12 凯希特许有限公司 Laminar flow for the dressing applied to the tissue site and the reduced pressure system
EP2331162B1 (en) 2008-10-03 2013-12-11 KCI Licensing, Inc. System for using micro-electro-mechanical systems (mems) to heal wounds
US8158844B2 (en) 2008-10-08 2012-04-17 Kci Licensing, Inc. Limited-access, reduced-pressure systems and methods
JP2012508037A (en) 2008-11-07 2012-04-05 ケーシーアイ ライセンシング インコーポレイテッド Reduced pressure wound treatment dressing and systems
BRPI0915237A2 (en) 2008-11-14 2016-02-16 Kci Licensing Inc system for storing fluid removed from a tissue site, the apparatus for storing liquid from a tissue site, the method for storing liquid from a tissue site, and method for manufacturing an apparatus for storing liquid from a tissue site
JP2012509114A (en) 2008-11-19 2012-04-19 ケーシーアイ ライセンシング インク Multi-layer support system and method
US8276573B2 (en) 2008-11-26 2012-10-02 Electro-Pro, Inc. Failure prevention in portable target throwing machines
US20100150991A1 (en) 2008-12-15 2010-06-17 Bernstein Brent H Combination Wound Therapy
GB0900423D0 (en) 2009-01-12 2009-02-11 Smith & Nephew Negative pressure device
US8162907B2 (en) 2009-01-20 2012-04-24 Tyco Healthcare Group Lp Method and apparatus for bridging from a dressing in negative pressure wound therapy
US8167869B2 (en) 2009-02-10 2012-05-01 Tyco Healthcare Group Lp Wound therapy system with proportional valve mechanism
WO2010093753A1 (en) 2009-02-12 2010-08-19 Perfuzia Medical, Inc. Devices and methods for manipulating circulation in the circulatory system of a patient
US8663198B2 (en) 2009-04-17 2014-03-04 Kalypto Medical, Inc. Negative pressure wound therapy device
SE533726C2 (en) 2009-04-30 2010-12-14 Moelnlycke Health Care Ab Device with negative pressure wound treatment
US8251979B2 (en) 2009-05-11 2012-08-28 Tyco Healthcare Group Lp Orientation independent canister for a negative pressure wound therapy device
US20100298866A1 (en) 2009-05-19 2010-11-25 Tyco Healthcare Group Lp Wound closure system and method of use
US8298200B2 (en) 2009-06-01 2012-10-30 Tyco Healthcare Group Lp System for providing continual drainage in negative pressure wound therapy
US20100318043A1 (en) 2009-06-10 2010-12-16 Tyco Healthcare Group Lp Negative Pressure Wound Therapy Systems Capable of Vacuum Measurement Independent of Orientation
US20100324516A1 (en) 2009-06-18 2010-12-23 Tyco Healthcare Group Lp Apparatus for Vacuum Bridging and/or Exudate Collection
DE102009031992A1 (en) 2009-07-06 2011-01-13 Paul Hartmann Ag An apparatus for vacuum treatment of wounds
US8444613B2 (en) 2009-07-14 2013-05-21 Richard Vogel Pump leak monitor for negative pressure wound therapy
US20110034892A1 (en) 2009-08-10 2011-02-10 John Buan Passive wound therapy device
US8690844B2 (en) 2009-08-27 2014-04-08 Kci Licensing, Inc. Re-epithelialization wound dressings and systems
DE102009039515A1 (en) * 2009-08-31 2011-03-03 Vcs Medical Technology Gmbh Vacuum therapy device
US8241018B2 (en) 2009-09-10 2012-08-14 Tyco Healthcare Group Lp Compact peristaltic medical pump
US8529526B2 (en) 2009-10-20 2013-09-10 Kci Licensing, Inc. Dressing reduced-pressure indicators, systems, and methods
CA2785388A1 (en) 2009-12-22 2011-07-21 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
JP5727516B2 (en) 2010-01-29 2015-06-03 ケーシーアイ ライセンシング インク Pump cassette and wound treatment device
JP5507284B2 (en) 2010-02-17 2014-05-28 富士重工業株式会社 Control apparatus for an electric vehicle
US8814842B2 (en) 2010-03-16 2014-08-26 Kci Licensing, Inc. Delivery-and-fluid-storage bridges for use with reduced-pressure systems
US8821458B2 (en) 2010-04-16 2014-09-02 Kci Licensing, Inc. Evaporative body-fluid containers and methods
US9061095B2 (en) 2010-04-27 2015-06-23 Smith & Nephew Plc Wound dressing and method of use
US8641693B2 (en) 2010-05-18 2014-02-04 Kci Licensing, Inc. Reduced-pressure canisters and methods for recycling
US20120197229A1 (en) 2010-08-04 2012-08-02 Kalypto Medical, Inc. Sacral wound dressing and method of manufacturing a wound therapy device
ES2461916T3 (en) 2010-08-19 2014-05-21 Paul Hartmann Ag Foam dressing containing ointment base and for negative pressure therapy
GB201015656D0 (en) 2010-09-20 2010-10-27 Smith & Nephew Pressure control apparatus
RU2016112340A (en) 2010-09-20 2018-11-27 СМИТ ЭНД НЕФЬЮ ПиЭлСи providing negative pressure means
CA140189S (en) 2010-10-15 2011-11-07 Smith & Nephew Medical dressing
USD679819S1 (en) 2010-10-15 2013-04-09 Smith & Nephew Plc Medical dressing
JP2014516709A (en) 2011-05-24 2014-07-17 カリプト・メディカル・インコーポレイテッド Device with controller and pump module for providing a negative pressure for wound treatment
US9058634B2 (en) 2011-05-24 2015-06-16 Kalypto Medical, Inc. Method for providing a negative pressure wound therapy pump device
US9067003B2 (en) 2011-05-26 2015-06-30 Kalypto Medical, Inc. Method for providing negative pressure to a negative pressure wound therapy bandage
US9084845B2 (en) 2011-11-02 2015-07-21 Smith & Nephew Plc Reduced pressure therapy apparatuses and methods of using same
EP2827917A1 (en) 2012-03-20 2015-01-28 Smith & Nephew PLC Controlling operation of a reduced pressure therapy system based on dynamic duty cycle threshold determination
US9427505B2 (en) 2012-05-15 2016-08-30 Smith & Nephew Plc Negative pressure wound therapy apparatus
US10328188B2 (en) 2013-03-14 2019-06-25 Smith & Nephew, Inc. Systems and methods for applying reduced pressure therapy
US9737649B2 (en) 2013-03-14 2017-08-22 Smith & Nephew, Inc. Systems and methods for applying reduced pressure therapy

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