CA2663530A1 - System and method for determining a fill status of a canister of fluid in a reduced pressure treatment system - Google Patents
System and method for determining a fill status of a canister of fluid in a reduced pressure treatment system Download PDFInfo
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- CA2663530A1 CA2663530A1 CA002663530A CA2663530A CA2663530A1 CA 2663530 A1 CA2663530 A1 CA 2663530A1 CA 002663530 A CA002663530 A CA 002663530A CA 2663530 A CA2663530 A CA 2663530A CA 2663530 A1 CA2663530 A1 CA 2663530A1
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- reduced pressure
- canister
- pressure
- conduit
- decay
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- 239000012530 fluid Substances 0.000 title claims abstract 18
- 238000000034 method Methods 0.000 title claims 11
- 238000001514 detection method Methods 0.000 claims 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/71—Suction drainage systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
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- A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
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- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
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- Fluid Mechanics (AREA)
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- General Physics & Mathematics (AREA)
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- Rehabilitation Therapy (AREA)
- Pain & Pain Management (AREA)
- Physical Education & Sports Medicine (AREA)
- Epidemiology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- External Artificial Organs (AREA)
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Abstract
A reduced pressure treatment system is provided that includes a canister that is fluidly connected to a tissue site and is configured to receive fluid drawn from the tissue site under the influence of a reduced pressure. A reduced pressure source provides the reduced pressure and is fluidly connected to the tissue site by a fluid communication path, which may include a source conduit, the canister, and a target conduit. A sensing device communicates with the source conduit and is configured to sense a pressure in the source conduit. A valve communicates with the source conduit and is configured to vent the reduced pressure. A processing unit communicates with the sensing device and the valve and is configured to open the valve for a selected amount of time, determine a decay of reduced pressure, and determine a fill status of the canister based on the decay of reduced pressure.
Claims (23)
1. A method for detecting a fill status of a canister of fluid in a tissue treatment system, the method comprising:
creating a reduced pressure in a fluid communication path of the tissue treatment system;
applying the reduced pressure to a tissue site;
collecting fluid from the tissue site in the canister;
releasing the reduced pressure;
measuring a decay of the reduced pressure as the reduced pressure is released;
and determining from the measured decay a fill status of the canister.
creating a reduced pressure in a fluid communication path of the tissue treatment system;
applying the reduced pressure to a tissue site;
collecting fluid from the tissue site in the canister;
releasing the reduced pressure;
measuring a decay of the reduced pressure as the reduced pressure is released;
and determining from the measured decay a fill status of the canister.
2. The method of claim 1, wherein the reduced pressure is released in at least a portion of the fluid communication path.
3. The method of claim 1, wherein the fill status indicates that the canister is full or is not full.
4. The method of claim 1, wherein measuring the decay further comprises:
setting a pressure threshold below the reduced pressure;
upon release of the reduced pressure, measuring the time for the canister to attain the pressure threshold; and determining the fill status of the canister based on the measured time.
setting a pressure threshold below the reduced pressure;
upon release of the reduced pressure, measuring the time for the canister to attain the pressure threshold; and determining the fill status of the canister based on the measured time.
5. The method of claim 1, wherein releasing the reduced pressure and measuring the decay further comprises:
releasing the reduced pressure for a selected amount of time;
measuring a pressure attained within the at least a portion of the fluid communication path following the selected amount of time; and determining the fill status of the canister based on the pressure attained.
releasing the reduced pressure for a selected amount of time;
measuring a pressure attained within the at least a portion of the fluid communication path following the selected amount of time; and determining the fill status of the canister based on the pressure attained.
6. The method of claim 1, wherein releasing the reduced pressure and measuring the decay further comprises:
releasing the reduced pressure for a selected amount of time;
measuring a flow rate from the fluid communication path during the reduced pressure release; and determining a fill status of the canister based on the flow rate.
releasing the reduced pressure for a selected amount of time;
measuring a flow rate from the fluid communication path during the reduced pressure release; and determining a fill status of the canister based on the flow rate.
7. The method of claim 1, wherein determining a fill status includes determining a fill level.
8. The method of claim 1 further comprising:
if the fill level of the canister indicates a full canister, alerting a user that the canister is full.
if the fill level of the canister indicates a full canister, alerting a user that the canister is full.
9. The method of claim 1, wherein the fluid communication path includes the canister, a source conduit fluidly connecting the canister to a reduced pressure source, and a target conduit fluidly connecting the canister to the tissue site.
10. A reduced pressure treatment system comprising:
a canister fluidly connected to a tissue site and configured to receive fluid drawn from the tissue site under the influence of a reduced pressure;
a reduced pressure source configured to provide the reduced pressure and fluidly connected to the tissue site by a fluid communication path, the fluid communication path including a source conduit, the canister, and a target conduit, the canister being positioned between the reduced pressure source and the tissue site and being fluidly connected to the reduced pressure source by the source conduit, the canister further being fluidly connected to the tissue site by the target conduit;
a sensing device in communication with the source conduit and configured to sense a pressure in the source conduit;
a valve in communication with the source conduit and configured to vent the reduced pressure; and a processing unit in communication with the sensing device and the valve and configured to:
open the valve for a selected amount of time;
receive sensing data from the sensing device during the selected amount of time to determine a decay of reduced pressure; and determine a fill status of the canister based on the decay of reduced pressure.
a canister fluidly connected to a tissue site and configured to receive fluid drawn from the tissue site under the influence of a reduced pressure;
a reduced pressure source configured to provide the reduced pressure and fluidly connected to the tissue site by a fluid communication path, the fluid communication path including a source conduit, the canister, and a target conduit, the canister being positioned between the reduced pressure source and the tissue site and being fluidly connected to the reduced pressure source by the source conduit, the canister further being fluidly connected to the tissue site by the target conduit;
a sensing device in communication with the source conduit and configured to sense a pressure in the source conduit;
a valve in communication with the source conduit and configured to vent the reduced pressure; and a processing unit in communication with the sensing device and the valve and configured to:
open the valve for a selected amount of time;
receive sensing data from the sensing device during the selected amount of time to determine a decay of reduced pressure; and determine a fill status of the canister based on the decay of reduced pressure.
11. The system of claim 10, wherein the fill status indicates that the canister is full or is not full.
12. The system of claim 10, wherein:
the valve selectively vents the reduced pressure from at least a portion of the fluid communication path; and the decay of reduced pressure is determined in the at least a portion f the fluid communication path.
the valve selectively vents the reduced pressure from at least a portion of the fluid communication path; and the decay of reduced pressure is determined in the at least a portion f the fluid communication path.
13. The system of claim 10, wherein the processing unit is further configured to:
upon opening the valve, determine the time required for the canister to attain a pressure threshold; and determine the fill status of the canister using the time.
upon opening the valve, determine the time required for the canister to attain a pressure threshold; and determine the fill status of the canister using the time.
14. The system of claim 10, wherein the processing unit is further configured to:
determine a pressure attained within the fluid communication path following the selected amount of time, and determining the fill status of the canister based on the pressure attained.
determine a pressure attained within the fluid communication path following the selected amount of time, and determining the fill status of the canister based on the pressure attained.
15. The system of claim 10, wherein the processing unit is further configured to determine whether a blockage exists in the fluid communication path:
16. The system of claim 10 further comprising:
a second valve fluidly coupled to the target conduit and configured to close when the first valve is open.
a second valve fluidly coupled to the target conduit and configured to close when the first valve is open.
17. The system of claim 16, wherein the first valve and the second valve comprise electrically or mechanically-actuated valves.
18. The system of claim 10 further comprising:
an alarm in communication with the processing unit and configured to alert a user when the canister is full.
an alarm in communication with the processing unit and configured to alert a user when the canister is full.
19. A reduced pressure treatment system having full canister detection capabilities, the system comprising:
a reduced pressure source to provide a reduced pressure;
a porous pad positioned at the tissue site and fluidly connected to the reduced pressure source;
a canister fluidly connected between the porous pad and the reduced pressure source to collect fluid drawn from the tissue site;
a solenoid valve fluidly connected to a conduit between the canister and the reduced pressure source; and means for determining a pressure decay in the conduit when the solenoid valve is opened.
a reduced pressure source to provide a reduced pressure;
a porous pad positioned at the tissue site and fluidly connected to the reduced pressure source;
a canister fluidly connected between the porous pad and the reduced pressure source to collect fluid drawn from the tissue site;
a solenoid valve fluidly connected to a conduit between the canister and the reduced pressure source; and means for determining a pressure decay in the conduit when the solenoid valve is opened.
20. The system as defined in Claim 19, wherein the means for determining a pressure decay further comprises a flow sensor in communication with the conduit.
21. The system as defined in Claim 19, wherein the means for determining a pressure decay further comprises a pressure sensor in communication with the conduit.
22. The system as defined in Claim 19, wherein the means for determining a pressure decay further comprises a timer to measure an amount of time it takes for pressure in the conduit to reach a selected pressure threshold.
23. The system as defined in Claim 19 further comprising means to activate an alarm in response to the pressure decay being determined to indicate a full canister condition.
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US11/901,664 | 2007-09-18 | ||
PCT/US2007/020374 WO2008036360A2 (en) | 2006-09-19 | 2007-09-19 | System and method for determining a fill status of a canister of fluid in a reduced pressure treatment system |
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CA2663530C CA2663530C (en) | 2012-08-14 |
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CA2663530A Active CA2663530C (en) | 2006-09-19 | 2007-09-19 | System and method for determining a fill status of a canister of fluid in a reduced pressure treatment system |
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EP (2) | EP3222300A1 (en) |
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