Controlling operation of a reduced pressure therapy system based on dynamic duty cycle threshold determination
First Claim
1. An apparatus for applying negative pressure to a wound, the apparatus comprising:
- a negative pressure source configured to be fluidically coupled to a wound dressing via a fluid flow path;
a power source configured to supply power to the negative pressure source; and
a controller configured to;
monitor a duty cycle of the negative pressure source, a time elapsed from an initial activation of the negative pressure source, and a remaining capacity of the power source, the time elapsed from the initial activation being monitored independently from the remaining capacity of the power source;
adjust a duty cycle threshold based at least in part on the remaining capacity of the power source and the time elapsed from the initial activation; and
when a leak is present in the fluid flow path, operate the negative pressure source based at least in part on a comparison of the duty cycle and the duty cycle threshold.
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Accused Products
Abstract
Negative pressure wound therapy apparatuses and dressings, and systems and methods for operating such apparatuses for use with dressings are disclosed. In some embodiments, controlling the delivery of therapy can be based on monitoring and detecting various operating conditions. An apparatus can have a controller configured to monitor a duty cycle of a source of negative pressure. Based on the monitored duty cycle, the controller can determine whether a leak is present and provide an indication to a user. The controller can determine a duty cycle threshold in order to achieve an optimal or near optimal balance between an uninterrupted delivery of therapy, avoidance inconveniencing a user, conserving power, achieving optimal or near optimal efficiency, and/or limiting vibrational noise. In some embodiments, the duty cycle threshold is determined based at least in part on a capacity of a power source and an operational time of the apparatus.
411 Citations
28 Claims
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1. An apparatus for applying negative pressure to a wound, the apparatus comprising:
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a negative pressure source configured to be fluidically coupled to a wound dressing via a fluid flow path; a power source configured to supply power to the negative pressure source; and a controller configured to; monitor a duty cycle of the negative pressure source, a time elapsed from an initial activation of the negative pressure source, and a remaining capacity of the power source, the time elapsed from the initial activation being monitored independently from the remaining capacity of the power source; adjust a duty cycle threshold based at least in part on the remaining capacity of the power source and the time elapsed from the initial activation; and when a leak is present in the fluid flow path, operate the negative pressure source based at least in part on a comparison of the duty cycle and the duty cycle threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for operating a negative pressure apparatus comprising a negative pressure source and a power source, the method comprising:
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delivering negative pressure from the negative pressure source to a wound dressing via a fluid flow path; supplying power to the negative pressure source with the power source; monitoring a duty cycle of the negative pressure source, a time elapsed from initial activation of the negative pressure source, and a remaining capacity of the power source, the time elapsed from the initial activation being monitored independently from the remaining capacity of the power source; adjusting a duty cycle threshold based at least in part on the remaining capacity of the power source and the time elapsed from the initial activation; and when a leak is present in the fluid flow path, operating the negative pressure source based at least in part on a comparison of the duty cycle and the duty cycle threshold. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification