Low frequency cataract fragmenting device
View Patent ↗A control circuit that provides a driving signal to a transducer coupled to a mechanical cutting element. The transducer is capable of operating in a resonant mode. The driving signal contains a plurality of pulses provided in a time interval that does not cause the transducer to operate in the resonant mode.
1. A console that can be coupled to a handpiece that has at least one transducer and a reciprocating tip that can be inserted through a tissue of a patient, comprising:
a control circuit that can be coupled to the tip and generates packets of pulses at approximately a resonant frequency of the transducer to reciprocate the tip, each packet being separated by a pause period of no pulses so that the tip operates in a non-resonant mode and does not generate heat that denatures the tissue.
2. The console of claim 1 , wherein each packet has a time duration between 0.5–5.0 milliseconds.
3. The console of claim 2 , wherein each pause period has a time duration between 3.5–50 milliseconds.
4. A medical system, comprising:
a handpiece that has at least one transducer and a tip that can be inserted through a tissue of a patient; and,
a control circuit that is coupled to said handpiece and generates packets of pulses at approximately a resonant frequency of said transducer to reciprocate said tip, each packet being separated by a pause period of no pulses so that said tip operates in a non-resonant mode and does not generate heat that denatures the tissue.
5. The system of claim 4 , wherein each packet has a time duration between 0.5–5.0 milliseconds.
6. The system of claim 5 , wherein each pause period has a time duration between 3.5–50 milliseconds.
7. A console that can be coupled to a handpiece that has at least one transducer and a reciprocating tip that can be inserted through a cornea of a patient, comprising:
a control circuit that be coupled to the tip and generates packets of pulses at approximately a resonant frequency of the transducer to reciprocate the tip, each packet being separated by a pause period of no pulses so that the tip operates in a non-resonant mode and does not generate heat that denatures the cornea.
8. The console of claim 7 , wherein each packet has a time duration between 0.5–5.0 milliseconds.
9. The console of claim 8 , wherein each pause period has a time duration between 3.5–50 milliseconds.
10. The console of claim 7 , wherein the temperature does not exceed 45 degrees centigrade.
11. A medical system, comprising:
a handpiece that has at least one transducer and a tip that can be inserted through a cornea of a patient; and,
a control circuit that is coupled to said handpiece and generates packets of pulses at approximately a resonant frequency of said transducer to reciprocate said tip, each packet being separated by a pause period of no pulses so that said tip operates in a non-resonant mode and does not generate heat that denatures the cornea.
12. The system of claim 11 , wherein each packet has a time duration between 0.5–5.0 milliseconds.
13. The system of claim 12 , wherein each pause period has a time duration between 3.5–50 milliseconds.
14. The system of claim 11 , wherein the temperature does not exceed 45 degrees centigrade.
15. A medical system, comprising:
a cutting element that can be placed in contact with a tissue of a patient;
a transducer coupled to said cutting element; and,
a control circuit that is coupled to said transducer and generates packets of pulses at approximately a resonant frequency of said transducer to reciprocate said cutting element, each packet being separated by a pause period of no pulses so that said tip operates in a non-resonant mode and does not generate heat that denatures the tissue.
16. The system of claim 15 , wherein each packet has a time duration between 0.5–5.0 milliseconds.
17. The system of claim 16 , wherein each pause period has a time duration between 3.5–50 milliseconds.
18. A medical system, comprising:
a cutting element that can be placed in contact with a cornea of a patient;
a transducer coupled to said cutting element; and,
a control circuit that is coupled to said transducer and generates packets of pulses at approximately a resonant frequency of said transducer to reciprocate said cutting element, each packet being separated by a pause period of no pulses so that said tip operates in a non-resonant mode and does not generate heat that denatures the cornea.
19. The system of claim 18 , wherein each packet has a time duration between 0.5–5.0 milliseconds.
20. The system of claim 19 , wherein each pause period has a time duration between 3.5–50 milliseconds.
21. The system of claim 18 , wherein the temperature does not exceed 45 degrees centigrade.