PHACOEMULSIFICATION HAND PIECE WITH INTEGRATED ASPIRATION PUMP
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.