Patent ID: 8475403

Claim:
A medical device for aspirating fluid from and injecting fluid into a body cavity for use with first and second syringes, the device comprising: an outer needle having an outer lumen formed through the outer needle and a first opening at a distal end, the first opening being in fluid communication with the outer lumen, the distal end of the outer needle configured to puncture tissue for insertion of the outer needle into the body cavity; an inner cannula disposed within the outer lumen, the inner cannula having an inner lumen formed through the inner cannula and a second opening at a distal end of the inner cannula, the second opening being biasingly closed and in fluid communication with the inner lumen, the distal end of the inner cannula being disposed within the outer needle lumen; and a hub having a first hub opening for fluidly connecting the first syringe to the outer needle lumen and a second hub opening for fluidly connecting the second syringe to the inner cannula lumen, the inner cannula being disposed within the outer needle lumen from at least one of the first and second hub openings to the distal end of the inner cannula.