초록 ▼

An endoscopic surgical instrument for aspiration and irrigation of a surgical site is disclosed. Connection ports for irrigation fluid and a suction source are provided which communicate with a single lumen cannula which transports both the irrigation fluid and the suction pressure to the surgical s

An endoscopic surgical instrument for aspiration and irrigation of a surgical site is disclosed. Connection ports for irrigation fluid and a suction source are provided which communicate with a single lumen cannula which transports both the irrigation fluid and the suction pressure to the surgical site. A valve mechanism having a novel valve stem and valve arrangement is also disclosed for providing higher pressure capabilities for the instrument. In one embodiment, the single lumen cannula is provided with a sliding sleeve to vary the pressure of the irrigation fluid to provide for high pressure application of the irrigation fluid to perform hydrodissection. The aspiration-irrigation instrument may also include electrocautery capabilities and a detachable cannula assembly for interchanging cannulas having different working tool members. In one embodiment, a sliding outer sleeve is also provided for selectively exposing the working tool members. An insertion port for reception of a surgical instrument which may be utilized with the suction and irrigation device during surgical procedures is also disclosed.

대표청구항 ▼

A surgical instrument for communication of a pressure source to a surgical site, comprising: at least one pressure source connection member; at least one passageway extending from the connection member; a cannula extending from the passageway to the surgical site, the cannula having a proximal and a

A surgical instrument for communication of a pressure source to a surgical site, comprising: at least one pressure source connection member; at least one passageway extending from the connection member; a cannula extending from the passageway to the surgical site, the cannula having a proximal and a distal end; and at least one valve mechanism including a valve body disposed at least partially within the at least one passageway, the valve mechanism further including: an actuator; a valve stem movable in response to the actuator between a first position in which the at least one passageway is blocked from communication with the surgical site and a second position in which the passageway is opened to allow communication of the pressure source with the surgical site, the valve stem including a valve having an aperture which is positioned in the at least one passageway when the stem is in the second position, and the valve having a membrane adjacent the aperture, the membrane being bounded by a first frustroconical wall and being positioned in the at least one passageway when the stem is in the first position.