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 - 8 . (canceled) 
     
     
         9 . 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 comprising:
 a motor; and 
 a shaft having a spiral structure coupled to the motor; 
   a rigid length of aspiration line located between the aspiration pump and the needle, and   a removable cartridge that is releasably securable to the aspiration pump, the removable cartridge comprising a flexible tubing pressed against the spiral structure operable to cause movement of fluid within the flexible tubing as the shaft is rotated by the motor.   
     
     
         10 . The hand piece of  claim 9  further comprising:
 an aspiration pressure sensor located between the removable cartridge and the needle. 
 
     
     
         11 . The hand piece of  claim 9  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. 
 
     
     
         12 . The hand piece of  claim 9  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. 
 
     
     
         13 . 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 comprising:
 a motor; and 
 a shaft having a spiral structure coupled to the motor; 
   a disposable segment that is removably coupled to the aspiration pump, the disposable segment comprising a flexible tubing pressed against the spiral structure operable to cause movement of fluid within the flexible tubing as the shaft is rotated by the motor; and   a rigid length of aspiration line located between the aspiration pump and the needle.   
     
     
         14 . The hand piece of  claim 13  further comprising:
 an aspiration pressure sensor located between the disposable segment and the needle. 
 
     
     
         15 . The hand piece of  claim 13  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. 
 
     
     
         16 . The hand piece of  claim 13  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.