Portable negative pressure wound therapy device
First Claim
1. A portable negative pressure wound therapy system comprising:
- a dressing assembly for positioning over a wound to apply a negative pressure to the wound; and
a canister assembly dimensioned to be worn by a user, said canister assembly including;
a control unit having a negative pressure source and a controller; and
a collection canister in communication with the dressing assembly and having a chamber operable to receive fluid from the wound, the collection canister including;
a suction port in fluid communication with said negative pressure source; and
a ball float arrangement having a ball float operable to substantially close said suction port in response to one of collection of a predetermined volume of exudate in the collection canister, tilting of the collection canister beyond a predetermined angle of orientation or inversion of the collection canister,wherein said ball float has at least one groove.
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Accused Products
Abstract
A portable NPWT system includes a dressing assembly for positioning over a wound to apply a negative pressure to the wound and a canister assembly. The canister assembly includes a control unit having a vacuum source and a controller and a collection canister in communication with the dressing assembly operable to receive fluid from the wound. The collection canister has ports to introduce a vacuum from the vacuum source into the collection canister. A ball float is provided to substantially close the suction port in response to one of collection of a predetermined volume of exudate in the collection canister, tilting of the collection canister beyond a predetermined angle of orientation or inversion of the collection canister.
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Citations
11 Claims
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1. A portable negative pressure wound therapy system comprising:
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a dressing assembly for positioning over a wound to apply a negative pressure to the wound; and a canister assembly dimensioned to be worn by a user, said canister assembly including; a control unit having a negative pressure source and a controller; and a collection canister in communication with the dressing assembly and having a chamber operable to receive fluid from the wound, the collection canister including; a suction port in fluid communication with said negative pressure source; and a ball float arrangement having a ball float operable to substantially close said suction port in response to one of collection of a predetermined volume of exudate in the collection canister, tilting of the collection canister beyond a predetermined angle of orientation or inversion of the collection canister, wherein said ball float has at least one groove. - View Dependent Claims (2, 3, 5, 6, 7, 8, 10, 11)
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4. A portable negative pressure wound therapy system comprising,
a dressing assembly for positioning over a wound to apply a negative pressure to the wound; - and
a canister assembly dimensioned to be worn by a user, said canister assembly including; a control unit having a negative pressure source, a controller, and a pressure transducer operable to measure a pressure level in said collection canister; and a collection canister in communication with the dressing assembly and having a chamber operable to receive fluid from the wound, the collection canister including; a suction port in fluid communication with said negative pressure source; and a ball float arrangement having a ball float operable to substantially close said suction port in response to one of collection of a predetermined volume of exudate in the collection canister, tilting of the collection canister beyond a predetermined angle of orientation or inversion of the collection canister, wherein said control unit further comprises a first transducer port coupled to said pressure transducer, said first transducer port has a protrusion coupled thereto; and said collection canister has a second transducer port, said second transducer port having a valve to prevent exudate from exiting said collection canister, said protrusion opens said valve when said control unit is attached to said collection canister so that said pressure transducer can measure the pressure level in said collection canister.
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9. A portable negative pressure wound therapy system comprising,
a dressing assembly for positioning over a wound to apply a negative pressure to the wound; - and
a canister assembly dimensioned to be worn by a user, said canister assembly including; a control unit having a negative pressure source and a controller; and a collection canister in communication with the dressing assembly and having a chamber operable to receive fluid from the wound, the collection canister including; a suction port in fluid communication with said negative pressure source; and a ball float arrangement having a ball float operable to substantially close said suction port in response to one of collection of a predetermined volume of exudate in the collection canister, tilting of the collection canister beyond a predetermined angle of orientation or inversion of the collection canister, wherein said ball float has a coating, said coating includes a hydrophobic material, latex, or polytetrafluoroethylene (PTFE).
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Specification