In order for lens ultrasonic emulsification absorption technique the flow sleeve, to surround the portion of the shaft of the needle for lens ultrasonic emulsification absorption technique, being tube condition itself area of the long elasticity where it was formed, it includes the tube condition itself area of the long elasticity where it possesses the distance destal and the proximal destal and the inside and the outside. The area which was formed to the proximal destal of tube condition itself area, is expanded, surrounds the hub of the needle for lens ultrasonic emulsification absorption technique and at the same time joints the flow sleeve to the hand piece for lens ultrasonic emulsification absorption technique. As for the flow sleeve, approaching to the distance destal of tube condition itself area, at least one which was formed slit condition being the flow port, reacting to the pressure drop in with the inside and the outside, in order to spread, one which is formed slit condition furthermore it possesses the flow port at least.水晶体超音波乳化吸引術用灌流スリーブが、水晶体超音波乳化吸引術用ニードルのシャフトの一部を囲むように構成された、細長い弾性のチューブ状本体区域であって、遠位端部及び近位端部並びに内面及び外面を有する、細長い弾性のチューブ状本体区域を含む。チューブ状本体区域の近位端部に形成された、拡大された区域が、水晶体超音波乳化吸引術用ニードルのハブを囲み且つ灌流スリーブを水晶体超音波乳化吸引術用ハンドピースに接続する。灌流スリーブは、チューブ状本体区域の遠位端部に近接して形成された少なくとも一つのスリット状灌流ポートであって、内面と外面との間における圧力降下に反応して広がるように構成された少なくとも一つのスリット状灌流ポートを更に具備する。
