Clarkson D M, Phillips C I
Trans Ophthalmol Soc U K (1962). 1975;95(4):477-81.
An ultrasonic lens-disintegrations system is added to the aspiration side of an irrigation-aspiration system. It incorporates an acoustic horn of which one part is a stainless steel cone 4 cm long with a 1 cm diameter base. From the apex of the cone projects the other part, viz. a 22 gauge needle, which is inserted into the anterior chamber at the limbus temporally (left eye) and which carries aspirated lens fragments with saline out into a duct drilled 2 cm into the cone along its axis. At that point the duct turns at right-angles to leave the cone; a polythene tube connects the duct with the aspiration syringe. A vibration generator (sandwich transducer) initiates ultrasonic vibrations which the needle-cone combination magnifies about 100-fold at the tip of the needle. Saline input to and output from the anterior chamber are maintained exactly equal (and simultaneous) by means of a 'push-pull' system of twin reciprocating hand-driven 30 ml. syringes (Fig. 7). Saline input is through a 25 gauge needle at the limbus at 6 o'clock (left eye).
在冲洗 - 抽吸系统的抽吸侧增加了一个超声晶状体破碎系统。它包括一个变幅杆，其一部分是一个4厘米长、底部直径为1厘米的不锈钢锥体。从锥体的顶点伸出另一部分，即一根22号针头，该针头经颞侧（左眼）角膜缘插入前房，并将带有盐水的吸出晶状体碎片沿锥体轴线钻入锥体2厘米处的管道中。在该点处，管道直角转弯离开锥体；一根聚乙烯管将管道与抽吸注射器相连。一个振动发生器（夹心换能器）产生超声振动，针 - 锥体组合在针尖处将其放大约100倍。通过双往复手动驱动的30毫升注射器的“推 - 拉”系统，精确保持前房的盐水输入和输出相等（且同时进行）（图7）。盐水通过6点钟位置（左眼）角膜缘处的一根25号针头输入。
