| 摘要 |
<p>A pneumatic tissue dissector (10) useful for cutting or dissecting living tissue during endoscopic or laparoscopic procedures includes a dissector tip (16) for exuding a flow of pressurized gas, an inlet arrangement (24) for controlling the flow of gas from the tip (16), and an exhaust system (30) for exhausting the gas exuded from the tip (16). The exhaust system includes an inlet (32) adjacent to the tip (16) and an outlet spaced from the inlet (32). The outlet (34) is operable in coordination with the inlet arrangement (24) and is capable of exhausting a flow of gas about equal to that exuded by the tip (16), ensuring that the pressure in the cavity in which the procedure is performed does not increase or fluctuate. A method of using the dissector (10) to cut or dissect tissue includes the steps of establishing an insufflated cavity in a patient, positioning the dissector tip (16) and the inlet (32) in the cavity, and actuating the inlet arrangement (24) so as to exude a flow of pressurized gas from the dissector tip (16) and out the outlet (34).</p> |
