초록 ▼

A surgical device for excision of tissue, the device being particularly suitable for removal of cataracts from the eye, includes a rotating stylus, a source of fluid for washing away excised tissue and a vacuum tube for removal of slurry consisting of excised tissue suspended in washing fluid. The a

A surgical device for excision of tissue, the device being particularly suitable for removal of cataracts from the eye, includes a rotating stylus, a source of fluid for washing away excised tissue and a vacuum tube for removal of slurry consisting of excised tissue suspended in washing fluid. The assembly is small enough to be hand-held and insertable through a small incision.

대표청구항 ▼

A surgical device for excision of tissue and flushing same away, comprising housing means adapted for support in a hand of a user; motor means mounted in said housing and having a rotatable output shaft projecting through a wall in said housing means; means for powering said motor means in said hous

A surgical device for excision of tissue and flushing same away, comprising housing means adapted for support in a hand of a user; motor means mounted in said housing and having a rotatable output shaft projecting through a wall in said housing means; means for powering said motor means in said housing means, said housing means being formed to provide a watertight seal about said motor means shaft extending therethrough; a fitting; releasable coupling means formed in said fitting and in the exterior region of said housing means surrounding said motor shaft extending therethrough for releasably coupling said fitting and said housing means; said fitting being formed with a chamber therein defined, in part, by an end wall formed with an aperture therethrough in registration with said motor means shaft; a first hollow needle mounted on said fitting with its inner end in communication with said chamber and in registration with said aperture and said motor means shaft and its outer end being completely open and free of end wall; a first tube mounted on said fitting and having an inner end communicating with said chamber and an outer end for connection to a vacuum source to decrease the pressure in said chamber and first hollow needle; a rotatable stylus shaft releasably coupled to the end of said motor means shaft projecting outside of said housing means, said stylus shaft being journalled through said end wall aperture and extending through said chamber and first hollow needle, said stylus shaft being shaped to provide a clearance between the side periphery thereof and the inner wall of said first hollow needle for the passage of tissue and fluid therebetween, and being shaped to at least aid in the drawing of tissue from the end thereof to and through a portion of said first needle when said shaft is rotated, the end of said stylus being shaped to cut tissue in contact therewith; a second hollow needle parallel to and secured to said first needle and essentially contiguous therewith; the outer end of said second needle being essentially flush with the outer end of said first needle, the outer ends of said first and second needles being bevelled, the cutting end of said stylus being positioned essentially at the cutaway region defined by the bevel in the end of said first needle; a second tube mounted on said fitting for support thereby and having an inner end coupled to the inner end of said second hollow needle and its outer end adapted for connection to a source of washing fluid; whereby the combination of introduction of washing fluid into the vicinity of the cutting end of said stylus shaft when rotating, a drop of pressure in said first hollow needle and the operation of said stylus shaft results in the flushing away through said first hollow needle, said fitting chamber and out said first tube of tissue excised by said rotating stylus shaft and fluid associated therewith, and whereby said fitting, first and second tubes and first and second hollow needles may be removed from said housing as a unit.