Instruments designed for laparoscopic irrigation and aspiration often can deliver (pump under pressure) a large amount of fluid (selected by the operating surgeon) through an inflow port and suction out this fluid (under pressure) through an outflow port. The surgeon opens (controls) the ports by buttons on the irrigator aspirator device. The pressure applied to the inflow and outflow fluid is variable and also under the control of the surgeon.
Irrigator devices can be used to separate tissues under the pressure of the inflowing liquid (called hydrodissection). Most often, the instrument is used simply to wash off and then remove blood or char from an operative site.
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