Systems and methods for controlling operation of a reduced pressure therapy system

摘要

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 the duty cycle of a source of negative pressure and, based on the monitored duty cycle, determine whether a leak is present. The controller can be configured to provide an indication that a leak is present. For example, the controller can be configured to suspend and/or pause the delivery of therapy, and to restart the delivery of therapy due to a timeout, request from a user, etc. In addition, the controller can be configured to pause and/or restart the delivery of therapy upon a request from the user, such as in response to the user operating a switch.

主权项

1. An apparatus for applying negative pressure to a wound, comprising:
a source of negative pressure configured to be coupled to a dressing configured to be placed over the wound and to create a substantially fluid impermeable seal over the wound; and a controller configured to:
activate the source of negative pressure to establish a desired negative pressure level under the dressing;deactivate the source of negative pressure when a pressure level under the dressing has reached the desired negative pressure level;in response to detecting a loss of negative pressure under the dressing due to a leak, periodically activate the source of negative pressure to restore the desired negative pressure level under the dressing;monitor a plurality of duty cycles of the source of negative pressure over a plurality of time durations;update a duty cycle metric of the source of negative pressure in response to comparing each duty cycle of the plurality of duty cycles to a duty cycle threshold; andin response to determining that the duty cycle metric exceeds an overload threshold, indicate that the leak has a flow rate that exceeds a flow threshold.