Control of vacuum level rate of change
First Claim
1. A vacuum wound therapy device for providing a negative pressure at a wound bed, the vacuum wound therapy device comprising:
- a vacuum bandage configured to fluidly communicate with the wound bed, a vacuum source fluidly coupled to the vacuum bandage to provide negative pressure for presentation at the wound bed, and a controller controlling the rate of change of negative pressure presented at the wound bed.
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Accused Products
Abstract
A wound treatment apparatus has a vacuum bandage covering a wound of a patient, a vacuum source coupled to the vacuum bandage, and a controller that operates the vacuum source to apply negative pressure to the wound through the bandage in a controlled manner. The controller is programmed to limit the rate of change of the negative pressure applied to the wound. A caregiver has the ability to change one or more negative pressure setpoint values and the controller of the wound treatment apparatus controls the rate of change of the negative pressure to reduce patient discomfort.
289 Citations
16 Claims
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1. A vacuum wound therapy device for providing a negative pressure at a wound bed, the vacuum wound therapy device comprising:
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a vacuum bandage configured to fluidly communicate with the wound bed, a vacuum source fluidly coupled to the vacuum bandage to provide negative pressure for presentation at the wound bed, and a controller controlling the rate of change of negative pressure presented at the wound bed. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A controller for regulating a negative pressure provided to a wound bed of a patient through a vacuum bandage fluidly coupled to a vacuum source, the controller comprising:
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a regulator configured to regulate the negative pressure provided at the wound bed by the vacuum bandage and vacuum source in response to a pressure regulation signal, a pressure transducer positioned to detect the negative pressure at the wound bed and provide a pressure signal indicative of the negative pressure at the wound bed, setpoint circuitry configured to provide a setpoint signal indicative of a desired negative pressure at the wound bed, and control circuitry electrically coupled to the pressure transducer, the setpoint circuitry and the regulator, whereby the control circuitry generates the pressure regulation signal in response to the pressure signal and setpoint signal to limit the rate of change of negative pressure at the wound bed while adjusting the negative pressure at the wound bed to the desired negative pressure. - View Dependent Claims (8, 9, 10, 11, 13, 14, 15)
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12. A method of providing vacuum wound therapy to a wound bed comprising the steps of providing a vacuum bandage in fluid communication with the wound bed, adjusting the air pressure at the wound bed through the vacuum bandage, and controlling the rate of change of the air pressure at the wound bed.
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16. A method for applying a vacuum to a space above an open wound bed, thereby to enhance the rate of healing of the wound, the method comprising:
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establishing a predetermined vacuum pressure level to be achieved in the space, applying a suction from a vacuum source to the space, the suction being applied through a proportional valve, and controlling the proportional valve in incremental steps to increase the vacuum up to the predetermined pressure.
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Specification