GB2502538A - Negative pressure wound therapy system with a buffering unit - Google Patents
Negative pressure wound therapy system with a buffering unit Download PDFInfo
- Publication number
- GB2502538A GB2502538A GB1209540.2A GB201209540A GB2502538A GB 2502538 A GB2502538 A GB 2502538A GB 201209540 A GB201209540 A GB 201209540A GB 2502538 A GB2502538 A GB 2502538A
- Authority
- GB
- United Kingdom
- Prior art keywords
- negative pressure
- therapy system
- buffering unit
- actuator
- wound therapy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003139 buffering effect Effects 0.000 title claims abstract description 77
- 238000009581 negative-pressure wound therapy Methods 0.000 title claims abstract description 60
- 206010052428 Wound Diseases 0.000 claims abstract description 74
- 208000027418 Wounds and injury Diseases 0.000 claims abstract description 74
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002033 PVDF binder Substances 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 6
- -1 Polypropylene Polymers 0.000 claims description 5
- 239000006261 foam material Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 229920005992 thermoplastic resin Polymers 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract description 4
- 239000000872 buffer Substances 0.000 abstract description 2
- 208000015181 infectious disease Diseases 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 230000029663 wound healing Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- A61M1/88—Draining devices having means for processing the drained fluid, e.g. an absorber
-
- 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
- A61M1/912—Connectors between dressing and drainage tube
- A61M1/913—Connectors between dressing and drainage tube having a bridging element for transferring the reduced pressure from the connector to 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
- A61M27/00—Drainage appliance for wounds or the like, i.e. wound drains, implanted drains
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Otolaryngology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
A negative pressure wound therapy system has a buffering unit 50 connected between an actuator 30 and a wound dressing 60, a sensor 20 connected to the buffering unit 50, a controller 10 connected to the sensor 20 and an actuator 30, and a collector 40 connected to the actuator 30. The buffering unit 50 compensates for negative pressure loss in the wound and resists pressure rise in the wound during slight leakage, dampens the pressure variations from the actuator 30 which may be turned on and off according to the controller 40 and sensor 20, and keeps the actuator 30 from directly operating on the wound to reduce the pain of the patient while lowering the pressure in the wound. The buffering unit 50 may comprise a water-absorbing layer 51, an air-permeating layer 52 which stops liquid flowing into the sensor, and a mesh layer 53 to keep the buffer from collapsing (see figure 3). Under negative pressure the water-absorbing layer 51 compresses and water drains out into the collector. When the actuator is stopped, the water-absorbing layer expands.
Description
NEGATIVE PRESSURE WOUND THERAPY SYSTEM WITH A BUFFERING
UNIT
1. Field of the Invention
The present invention relates a negative pressure wound therapy system, especially to a negative pressure wound therapy system with a buffering unit.
2. Description of the Prior Arts
Negative pressure wound therapy utilizes wound sheets, soft suction pads, or biocompatible 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. To provide negative pressure wound therapy, a conventional negative pressure wound therapy system is developed.
With reference to Fig. 6, when the conventional negative pressure wound therapy system is operated, the inner pressure of the collector 92 in front of the actuator 91 or the pressure at the detecting position 93 near the wound 94 is used as the feedback control pressure. The detecting position 93 is nearer the wound 94 than the collector 92 so that the pressure detected at the detecting position 93 is closer to the pressure in the wound 94. The controller 95 receives the signal from the sensor to actuate feedback control to determine whether the actuator 91 is restarted to maintain the negative pressure in the wound 94. Then the negative pressure in the wound 94 is kept in a certain range. However, the pressures at the detecting position 93 and in the collector 92 are both different from the pressure in the wound 94 so that the timing to restart the actuator 91 is inaccurate.
Additionally, the negative pressure in the wound undergoes slight changes frequently since a slight leakage occurs because a trace of pus and plasma may permeate out of the wound or the wound dress may be torn. If the controller restarts the actuator frequently because of the slightly changed negative pressure in the wound, or the actuator is kept operated at low speed when the negative pressure is steady, energy is consumed and the cost is increased. If the actuator is restarted when the true negative pressure in the wound is far from the desired negative pressure in the wound to recover the desired negative pressure, the rapid change of the pressure in the wound causes pain.
Moreover, one of the conventional negative pressure wound therapy systems has the actuator connected between the collector and the wound. The actuator directly operates on the wound so that the patient easily feels the pain when the actuator is operated.
The main objective of the present invention is to provide a negative pressure wound therapy system with a buffering unit to maintain the negative pressure in the wound without restarting the actuator. The negative pressure wound therapy system has a buffering unit connected between an actuator and a wound dressing. The buffering unit has the same physical condition with the wound, consumes its negative pressure to compensate for the negative pressure loss in the wound to resist the pressure rise in the wound during slight leakage. The buffering unit also keeps the actuator from directly operating on the wound to reduce the pain of the patient while lowering the pressure in the wound.
IINTHEDRAWINGS
Fig. 1 is a perspective view of a negative pressure wound therapy system with a buffering unit in accordance with the present invention; Fig. 2 is a block diagram of the negative pressure wound therapy in Fig. 1; Fig. 3 is an exploded perspective view of the buffering unit of the negative pressure wound therapy system in Fig. 1; Fig. 4 is a graph depicting time plotted against pressure of the negative pressure wound therapy system in Fig. 1, showing the pressure variation during the leaking and slight leakage; Fig. 5 is a graph depicting time plotted against pressure of the negative pressure wound therapy system in Fig. 1, showing the pressure variation while alternatively opening the valve and restarting the actuator; and Fig. 6 is a block diagram of a conventional negative pressure wound therapy
system in accordance with the prior art.
With reference to Figs. 1 and 2, a negative pressure wound therapy system in accordance with the present invention comprises a controller 10, a sensor 20, an actuator 30, a collector 40, a buffering unit 50 and a wound dressing 60.
The controller 10 is electrically connected to the sensor 20 and the actuator 30. The sensor 20 sends signals to the controller 10, and then the controller 10 determines whether the actuator 30 is restarted. The actuator is connected respectively to the buffering unit 50 and the collector 40. In a preferred embodiment, the actuator 30 is connected between the buffering unit 50 and the collector 40. The sensor 20 is connected to the buffering unit 50. The buffering unit 50 is connected between the wound dressing 60 and the actuator 30.
The buffering unit 50 has similar physical condition with the wound.
Because the buffering unit 50 is connected to the wound dressing 60, the pressure at the buffering unit 50 is similar to the pressure in the wound.
Therefore, the sensor 20 detects the pressure at the buffering unit 50 as a reference for feedback control. The buffering unit 50 consumes its negative pressure to compensate for the negative pressure loss in the wound dressing 60.
With reference to Fig. 3, in a preferred embodiment, the buffering unit 50 comprises a water-absorbing layer 51, an air-permeating layer 52 and a meshed layer 53. The buffering unit 50 may comprise one of the layers 51, 52, 53, or may comprise all of the layers 51, 52, 53. The air-permeating layer 52 is connected to the sensor 20. The water-absorbing layer 51 may be made of polymer foam material such as Polyvinyl Alcohol (PVA). The water-absorbing layer 51 has high water-absorbability and the volume of the water-absorbing layer 51 is easily expanded. The water-absorbing feature of the water-absorbing layer 51 is reversible. When the buffering unit 50 is in negative pressure, the volume of the water-absorbing layer 51 is compressed and the water-absorbing layer 51 drains out the water. When the buffering unit 50 comes off the negative pressure status, the volume of the water-absorbing layer 51 is expanded and performs sufficient water-absorption to absorb and save the remaining liquid in the tubes. The air-permeating layer 52 may be made of air-permeating but water-impermeable material such as Polyvinylidene fluoride (PVDF). The air-permeating layer 52 keeps the liquid from flowing into the sensor 20 and allows the air to flow into the sensor 20 so that the sensor 20 detects the negative pressure in the buffering unit 50 through the air-permeating layer 52. The meshed layer 53 may be made of thermoplastic resin such as Polypropylene (PP). The meshed layer 53 has meshes to simulate the wound tissue so that the liquid has appropriate flowing path to keep the buffering unit 50 from collapsing and pathological closing.
With reference to Fig. 2, when the negative pressure wound therapy system operates, the wound dressing 60 covers the patient's wound. The actuator 30 is started to create a negative pressure environment in the wound and to extract pus and infection subjects through the buffering unit 50. When the negative pressure reaches the predetermined value, the actuator 30 is stopped. The sensor 20 detects the negative pressure in the buffering unit 50 and sends feedback to the controller 10. The controller 10 depends on the detected negative pressure to determine whether the actuator 30 is restarted. The pus and infection subjects flows through the wound dressing 60, the buffering unit 50, and the actuator 30 in sequence, and then flows into the collector 40.
With reference to Fig. 4, the present invention creates leaking and slight leakage statuses to test the effect of the buffering unit. Initially, the actuator is started to make the pressure in the buffering unit to -210 mmHg and the pressure in the wound to -150 mmHg. Then the actuator is stopped.
At the time t1, the system is leaked for a few seconds. The pressure in the wound is raised to almost -90 mmHg and then the system is stopped from leaking. The pressure of the buffering unit is raised up slowly to compensate for the negative pressure loss in the wound. The pressure in the wound is lowered to -120 mmHg and is not able to reach the initial negative pressure since the leaking status raises too much pressure.
However, the buffering unit still compensates for some negative pressure loss in the wound.
At the times t2 and t3, the system is slightly leaked for a few seconds. The pressure in the wound is raised to almost -90 mmHg and then the system is stopped from slightly leaking. The pressure of the buffering unit is raised up slowly to compensate for the negative pressure loss in the wound. The pressure in the wound is lowered to -120 mmHg to reach the pressure before the slight leakage occurs since the slight leakage makes less negative pressure loss. Therefore, the buffering unit effectively compensates for the negative pressure loss in the wound during slight leakage and the negative pressure in the wound quickly returns to the value betore the slight leakage occurs.
With the aforementioned experiment, it is noted that the buffering unit immediately compensates for the negative pressure loss in the wound resulting from a trace of pus and plasma permeating out of the wound or the wound dress being torn without restarting the actuator. Therefore, the energy is saved since the actuator is not restarted frequently.
With reference to Fig. 5, the actuator is restarted manually and the valve is opened manually to create an active negative pressure environment. Initially, the actuator is started to make the negative pressure in the buffering unit reach -180 mmHg and the negative pressure in the At the time t4 and t5, the valve is opened manually in a few seconds to raise the pressure in the buffering unit. In the same time, the pressure in the buffering unit rapidly raises from -100 mmHg toO mmHg but the pressure in the wound slowly raises from -70 mmHg to -30 mmHg.
Therefore, it is noted that the rise of the pressure in the wound is less than the rise of the pressure in the buffering unit. At the time t8, even the valve opening time is doubled, the pressure in the wound still rises slowly.
At the time t5, t7 and t9, when the valve is closed, the actuator is restarted to lower the pressure. In the same time, the pressure in the buffering unit rapidly drops from 0 mmHg to -210 mmHg, but the pressure in the wound slowly drops from -30 mmHg to -60 mmHg and then keeps steady. Therefore, it is noted that the fall of the pressure in the wound is less than the tall of the pressure in the buffering unit.
With the aforementioned experiment, it is noted that since the actuator is directly operated on the buffering unit and is indirectly operated on the wound through the buffering unit, the buffering unit effectively buffers the impact to the wound while the actuator operates. Therefore, the pressure in the wound is raised and lowered in a gentle way, and the pain of the patient is reduced while the pressure is lowered.
Claims (20)
- CLAIMS: 1. A negative pressure wound therapy system comprising a controller (10), a sensor (20), an actuator (30), a collector (40), a wound dressing (60), and a buffering unit (50) that responds to the negative pressure variation and compensates for the negative pressure loss in the wound, wherein the controller (10) is electrically connected to the sensor (20) and the actuator (30); the actuator (30) is connected to the buffering unit (50) and the collector (40); the sensor (20) is connected to the buffering unit (50); and the buffering unit (50) is connected between the wound dressing (60) and the actuator (30).
- 2. The negative pressure wound therapy system as claimed in claim 1, wherein the buffering unit (50) comprises a water-absorbing layer (51)draining water while the volume of the water-absorbing layer (51) is compressed and absorbing water while the volume of the water-absorbing layer (51) is expanded.
- 3. The negative pressure wound therapy system as claimed in claim 1, wherein the buffering unit (50) comprises an air-permeating layer (52) connected to the sensor (20).
- 4. The negative pressure wound therapy system as claimed in claim 1, wherein the buffering unit (50) comprises a meshed layer (53) having meshes.
- 5. The negative pressure wound therapy system as claimed in claim 1, wherein the buffering unit (50) comprises a water-absorbing layer (51) draining water while the volume of the water-absorbing layer (51) is compressed and absorbing water while the volume of the water-absorbing layer (51) is expanded; an air-permeating layer (52) connected to the sensor (20); and a meshed layer (53) having meshes.
- 6. The negative pressure wound therapy system as claimed in claim 2, wherein the water-absorbing layer (51) is made of polymer foam material.
- 7. The negative pressure wound therapy system as claimed in claim 5, wherein the water-absorbing layer (51) is made of polymer foam material.
- 8. The negative pressure wound therapy system as claimed in claim 4, wherein the meshed layer (53) is made of thermoplastic resin.
- 9. The negative pressure wound therapy system as claimed in claim 5, wherein the meshed layer (53) is made of thermoplastic resin.
- 10. The negative pressure wound therapy system as claimed in claim 4, wherein the meshed layer (53) is made of Polypropylene.
- 11. The negative pressure wound therapy system as claimed in claim 5, wherein the meshed layer (53) is made of Polypropylene.
- 12. The negative pressure wound therapy system as claimed in claim 3, wherein the air-permeating layer (52) is made of air-permeating but water-impermeable material.
- 13. The negative pressure wound therapy system as claimed in claim 5, wherein the air-permeating layer (52) is made of air-permeating but water-impermeable material.
- 14. The negative pressure wound therapy system as claimed in claim 3, wherein the air-permeating layer (52) is made of Polyvinylidene fluoride.
- 15. The negative pressure wound therapy system as claimed in claim 5, wherein the air-permeating layer (52) is made of Polyvinylidene fluoride.
- 16. The negative pressure wound therapy system as claimed in claim 1, wherein the actuator (30) is connected between the buffering unit (50) and the collector (40).
- 17. The negative pressure wound therapy system as claimed in claim 5, wherein the actuator (30) is connected between the buffering unit (50) and the collector (40).
- 18. The negative pressure wound therapy system as claimed in claim 7, wherein the actuator (30) is connected between the buffering unit (50) and the collector (40).
- 19. The negative pressure wound therapy system as claimed in claim 11, wherein the actuator (30) is connected between the buffering unit (50) and the collector (40).
- 20. The negative pressure wound therapy system as claimed in claim 15, wherein the actuator (30) is connected between the buffering unit (50) and the collector (40).Amendments to the claims have been filed as follows CLAIMS: 1. A negative pressure wound therapy system comprising a controller (10), a sensor (20), an actuator (30), a collector (40), a wound dressing (60), and a buffering unit (50) that responds to the negative pressure variation and compensates for the negative pressure loss in the wound, wherein the controller (10) is electrically connected to the sensor (20) and the actuator (30); the actuator (30) is connected to the buffering unit (50) and the collector (40); C') the sensor (20) is connected to the buffering unit (50); and the buffering unit (50) is connected between the wound dressing (60) and the actuator (30), and is positioned nearer to the actuator (30) than to the a) (\,j wound dressing (60), and consumes its negative pressure to compensate for the negative pressure loss in the wound dressing (60).2. The negative pressure wound therapy system as claimed in claim 1, wherein the buffering unit (50) comprises a water-absorbing layer (51) draining water while the volume of the water-absorbing layer (51) is compressed and absorbing water while the volume of the water-absorbing layer (51) is expanded.3. The negative pressure wound therapy system as claimed in claim 1, wherein the buffering unit (50) comprises an air-permeating layer (52) connected to the sensor (20).4. The negative pressure wound therapy system as claimed in claim 1, wherein the buffering unit (50) comprises a meshed layer (53) having meshes.5. A negative pressure wound therapy system comprising a controller (10), a sensor (20), an actuator (30), a collector (40), a wound dressing (60), and a buffering unit (50) that responds to the negative pressure variation and compensates for the negative pressure loss in the wound, wherein the controller (10) is electrically connected to the sensor (20) and the actuator (30); the actuator (30) is connected to the buffering unit (50) and the C') 10 collector (40); the sensor (20) is connected to the buffering unit (50); and 0 the buffering unit (50) is connected between the wound dressing (60) and the actuator (30) and has a water-absorbing layer (51) draining water while the volume of the water-absorbing layer (51) is compressed and absorbing water while the volume of the water-absorbing layer (51) is expanded; an air-permeating layer (52) connected to the sensor (20); and a meshed layer (53) having meshes.6. The negative pressure wound therapy system as claimed in claim 2, wherein the water-absorbing layer (51) is made of polymer foam material.7. The negative pressure wound therapy system as claimed in claim 5, wherein the water-absorbing layer (51) is made of polymer foam material.8. The negative pressure wound therapy system as claimed in claim 4, wherein the meshed layer (53) is made of thermoplastic resin.9. The negative pressure wound therapy system as claimed in claim 5, wherein the meshed layer (53) is made of thermoplastic resin.10. The negative pressure wound therapy system as claimed in claim 4, wherein the meshed layer (53) is made of Polypropylene.11. The negative pressure wound therapy system as claimed in claim 5, wherein the meshed layer (53) is made of Polypropylene.12. The negative pressure wound therapy system as claimed in claim C') 10 3, wherein the air-permeating layer (52) is made of air-permeating but water-impermeable material.0 13. The negative pressure wound therapy system as claimed in claim 5, wherein the air-permeating layer (52) is made of air-permeating but water-impermeable material.14. The negative pressure wound therapy system as claimed in claim 3, wherein the air-permeating layer (52) is made of Polyvinylidene fluoride.15. The negative pressure wound therapy system as claimed in claim 5, wherein the air-permeating layer (52) is made of Polyvinylidene fluoride.16. The negative pressure wound therapy system as claimed in claim 1, wherein the actuator (30) is connected between the buffering unit (50) and the collector (40).17. The negative pressure wound therapy system as claimed in claim 5, wherein the actuator (30) is connected between the buffering unit (50) and the collector (40).18. The negative pressure wound therapy system as claimed in claim 7, wherein the actuator (30) is connected between the buffering unit (50) and the collector (40).19. The negative pressure wound therapy system as claimed in claim 11, wherein the actuator (30) is connected between the buffering unit (50) and the collector (40).C') 10 20. The negative pressure wound therapy system as claimed in claim 15, wherein the actuator (30) is connected between the buffering unit (50) and 0 the collector (40). a)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1209540.2A GB2502538B (en) | 2012-05-29 | 2012-05-29 | Negative pressure wound therapy system with a buffering unit |
| GB1413520.6A GB2516379B (en) | 2012-05-29 | 2012-05-29 | Negative pressure wound therapy system with a buffering unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1209540.2A GB2502538B (en) | 2012-05-29 | 2012-05-29 | Negative pressure wound therapy system with a buffering unit |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201209540D0 GB201209540D0 (en) | 2012-07-11 |
| GB2502538A true GB2502538A (en) | 2013-12-04 |
| GB2502538B GB2502538B (en) | 2014-10-22 |
Family
ID=46546131
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1209540.2A Expired - Fee Related GB2502538B (en) | 2012-05-29 | 2012-05-29 | Negative pressure wound therapy system with a buffering unit |
| GB1413520.6A Expired - Fee Related GB2516379B (en) | 2012-05-29 | 2012-05-29 | Negative pressure wound therapy system with a buffering unit |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1413520.6A Expired - Fee Related GB2516379B (en) | 2012-05-29 | 2012-05-29 | Negative pressure wound therapy system with a buffering unit |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB2502538B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3175871A1 (en) * | 2015-12-03 | 2017-06-07 | Primed Halberstadt Medizintechnik GmbH | Arrangement for the removal of wound secretions from body cavities |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030050594A1 (en) * | 2001-04-30 | 2003-03-13 | Kci Licensing, Inc. | Wound therapy and tissue management system and method with fluid differentiation |
| US20040059284A1 (en) * | 2002-09-24 | 2004-03-25 | Nash John E. | Interventional procedure drive and control system |
| US20060025727A1 (en) * | 2003-09-16 | 2006-02-02 | Boehringer Laboratories, Inc. | Apparatus and method for suction-assisted wound healing |
| GB2466088A (en) * | 2008-12-11 | 2010-06-16 | Ind Tech Res Inst | Wound dressing with flexible drainage bag containing matrix |
| US20110196303A1 (en) * | 2010-02-11 | 2011-08-11 | Baxter International Inc. | Flow pulsatility dampening devices |
| EP2412392A1 (en) * | 2010-07-29 | 2012-02-01 | Koninklijke Philips Electronics N.V. | Piston pump with variable buffer |
| GB2483292A (en) * | 2010-09-03 | 2012-03-07 | Apex Medical Corp | Collecting bag for a negative pressure wound therapy system |
-
2012
- 2012-05-29 GB GB1209540.2A patent/GB2502538B/en not_active Expired - Fee Related
- 2012-05-29 GB GB1413520.6A patent/GB2516379B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030050594A1 (en) * | 2001-04-30 | 2003-03-13 | Kci Licensing, Inc. | Wound therapy and tissue management system and method with fluid differentiation |
| US20040059284A1 (en) * | 2002-09-24 | 2004-03-25 | Nash John E. | Interventional procedure drive and control system |
| US20060025727A1 (en) * | 2003-09-16 | 2006-02-02 | Boehringer Laboratories, Inc. | Apparatus and method for suction-assisted wound healing |
| GB2466088A (en) * | 2008-12-11 | 2010-06-16 | Ind Tech Res Inst | Wound dressing with flexible drainage bag containing matrix |
| US20110196303A1 (en) * | 2010-02-11 | 2011-08-11 | Baxter International Inc. | Flow pulsatility dampening devices |
| EP2412392A1 (en) * | 2010-07-29 | 2012-02-01 | Koninklijke Philips Electronics N.V. | Piston pump with variable buffer |
| GB2483292A (en) * | 2010-09-03 | 2012-03-07 | Apex Medical Corp | Collecting bag for a negative pressure wound therapy system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3175871A1 (en) * | 2015-12-03 | 2017-06-07 | Primed Halberstadt Medizintechnik GmbH | Arrangement for the removal of wound secretions from body cavities |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201209540D0 (en) | 2012-07-11 |
| GB2516379B (en) | 2015-08-26 |
| GB2502538B (en) | 2014-10-22 |
| GB201413520D0 (en) | 2014-09-10 |
| GB2516379A (en) | 2015-01-21 |
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| Date | Code | Title | Description |
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| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20210529 |