Fluid management pump system for surgical procedures
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United States of America Patent
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Sep 22, 1998
Grant Date -
N/A
app pub date -
Dec 13, 1996
filing date -
Dec 13, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A fluid management pump system (30) for supplying sterile solution to a surgical site. The system includes an inflow tube (42) for supplying sterile solution to the surgical site. The solution is forced through the inflow tube by a pump (40). Fluid is drained from the surgical site in order to maintain the pressure at the site through an outflow tube (44). Both the inflow and outflow tubes are attached to a cassette (52). The cassette is mounted to a control unit (50). Internal to the cassette are pinch valves (54, 56) for controlling fluid flow through, respectively, the inflow and outflow tubes. The open/closed states of the inflow and outflow tubes are controlled by solenoids (58, 60) internal to the control unit that act on the pinch valves. The control unit actuates the solenoids and supplies the energization current to the pump based on operator entered commands and indication that the pressure at the surgical site. A column of air representative of liquid-state fluid pressure at the surgical site is supplied to the control unit through the cassette.
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