Apparatus and method for controlling a vacuum source to establish fluid flow
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United States of America Patent
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May 14, 2013
Grant Date -
May 27, 2010
app pub date -
Nov 21, 2008
filing date -
Nov 21, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A flow control system that includes a vacuum device configured to control the level of vacuum applied for urging the flow of aspirated fluid from a surgical site, and a vacuum sensor configured to communicate a signal representative of the sensed vacuum level. A flow sensor control is configured to generate a signal indicative of the rate of aspirated fluid flow. A flow controller monitors the vacuum sensor and the flow measurement device, and communicates a requested vacuum level to the vacuum device for establishing a desired vacuum level. The flow controller employs a first feed back loop that compares the actual sensed vacuum level with the requested vacuum level and adjusts the requested vacuum level as needed. The flow controller implements a second feedback loop that compares the actual flow rate of aspirated fluid with a desired flow rate, and adjusts the requested vacuum level to achieve the desired flow rate.
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