초록 ▼

An improved ultrasonic surgical aspirator for use in breaking up and removing tissue from an operative site recessed within a tissue body employs an elongated probe having an oval or elliptical cross section to more closely conform to and fit an incision in the tissue and to expose a wider area of t

An improved ultrasonic surgical aspirator for use in breaking up and removing tissue from an operative site recessed within a tissue body employs an elongated probe having an oval or elliptical cross section to more closely conform to and fit an incision in the tissue and to expose a wider area of tissue to ultrasonic vibrations as the operative tip of the probe is moved over the tissue. An improved method of performing a lensectomy on the human eye using the improved apparatus is also disclosed.

대표청구항 ▼

In an ultrasonic surgical aspirator for breaking apart and removing tissue from an operative site recessed within a body, the aspirator including a transducer for converting high-frequency electrical energy to mechanical vibrations, an elongated vibration transmitting body having one end operably as

In an ultrasonic surgical aspirator for breaking apart and removing tissue from an operative site recessed within a body, the aspirator including a transducer for converting high-frequency electrical energy to mechanical vibrations, an elongated vibration transmitting body having one end operably associated with the transducer and its other end adapted to threadably receive and support an operative probe, and a housing for supporting the transmitting body and the transducer and providing an inlet and outlet for irrigation fluid to be circulated over the operative site, the improvement wherein said operative probe comprises, a threaded mounting base portion adapted to be threadably mounted onto said transmitting body and an elongated slender body portion means having a longitudinal axis adapted to be inserted into a tissue body, said elongated portion terminating in an open end having free end surface means defining an operative tip for engaging and breaking apart tissue at the recessed operative site, an axial opening extending through said probe to enable the removal of broken-up tissue from the operative site through the probe, said free end surface means extending in a plane disposed at an acute angle relative to the longitudinal axis of the slender body portion, said slender body portion means having a substantially elliptical cross section defining a major axis and a minor axis from said free end surface means throughout at least a major portion of its length, and vibrating along said longitudinal axis, and a plane containing the longitudinal axis of the slender body portion means and the major axis of the substantially elliptical cross section thereof intersecting the plane of said free end surface means along the major axis of the oval or elliptical open end at said tip, wherein ultrasonic cutting time is reduced by the removal of said tissue in furrows corresponding in width to the major axis of said free end surface means and wherein wound spreading is reduced along the minor axis of said free end surface means of the slender body portion means.