Phacoemulsification Hand Piece With Integrated Aspiration Pump

Abstract

An ophthalmic surgical hand piece comprises a driver coupled to a horn. The horn is coupled to a needle. An aspiration pump is integral with the hand piece and is located close to the needle. A rigid length of aspiration line is located between the aspiration pump and the needle. An optional pressure sensor is located between the aspiration pump and the needle as well.

1 . An ophthalmic surgical hand piece comprising:
 a driver coupled to a horn, the horn coupled to a needle;   an aspiration pump integral with the hand piece, the aspiration pump located close to the needle; and   a rigid length of aspiration line located between the aspiration pump and the needle.   
     
     
         2 . The hand piece of  claim 1  further comprising:
 an aspiration pressure sensor located between the aspiration pump and the needle. 
 
     
     
         3 . The hand piece of  claim 1  further comprising:
 a vent valve located in parallel with the aspiration pump, the vent valve being variably controlled to variably control a vacuum produced by the aspiration pump. 
 
     
     
         4 . The hand piece of  claim 1  further comprising:
 a moveable member that engages a flexible length of aspiration line, a position of the moveable member with respect to the flexible length of aspiration line determining a leakage that decreases vacuum pressure in the rigid length of aspiration line. 
 
     
     
         5 . An ophthalmic surgical hand piece comprising:
 a driver coupled to a horn, the horn coupled to a needle;   an aspiration pump integral with the hand piece, the aspiration pump located close to the needle;   a disposable segment coupled to the aspiration pump; and   a rigid length of aspiration line located between the aspiration pump and the needle.   
     
     
         6 . The hand piece of  claim 5  further comprising:
 an aspiration pressure sensor located between the aspiration pump and the needle. 
 
     
     
         7 . The hand piece of  claim 5  further comprising:
 a vent valve located in parallel with the aspiration pump, the vent valve being variably controlled to variably control a vacuum produced by the aspiration pump. 
 
     
     
         8 . The hand piece of  claim 5  further comprising:
 a moveable member that engages disposable segment, a position of the moveable member with respect to the disposable segment determining a leakage that decreases vacuum pressure in the rigid length of aspiration line.