US7335997B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for controlling ultrasonic clamping and cutting instruments
Assignee: Cilag GmbH International
•
Filing: 2005-03-31
•
Granted: 2008-02-26
•
Expires: 2025-03-31
Abstract
Abstract A control system for use with an ultrasonic surgical instrument includes a generator supplying electrical energy to an ultrasonic surgical instrument, the electrical energy supplied by the generator being controlled such that power applied by the instrument is maintained constant once a predetermined pressure threshold is met. The control system operates by assigning a nominal power at which the ultrasonic instrument is to operate and adjusting the current and voltage applied to the ultrasonic surgical instrument so as to maintain the power applied by the ultrasonic surgical instrument at approximately the nominal power.
Inventors
- 👤 Eitan T. Wiener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:29
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/320068; A61B17/320092; A61B18/00; A61B18/18; A61B18/04; A61B18/12; A61N; A61N7/00; A61B2017/00017; A61B2017/00022; A61B2017/00026; A61B2017/00106; A61B2017/0011; A61B2017/320094; A61B2017/320095
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
An ultrasonic surgical system, comprising: an instrument and an ultrasonic signal generator linked to the instrument for supplying a desired signal to the instrument, the instrument includes an ultrasonic transducer, a housing and an end-effector; the ultrasonic signal generator includes a control system, the control system includes a generator supplying electrical energy to the instrument, the electrical energy supplied by the generator being controlled such that power applied by the instrument is maintained constant once a predetermined pressure threshold is met.
Claim 2
Dependent Claim
81 words
An ultrasonic surgical system, comprising: an instrument and an ultrasonic signal generator linked to the instrument for supplying a desired signal to the instrument, the instrument includes an ultrasonic transducer, a housing and an end-effector; the ultrasonic signal generator includes a control system, the control system includes a generator supplying electrical energy to the instrument, the electrical energy supplied by the generator being controlled such that power applied by the instrument is maintained constant once a predetermined pressure threshold is met.
Claim 3
Dependent Claim
30 words
The ultrasonic surgical system according to claim 1 , wherein the power applied by the instrument is equal to the product of the current and voltage generated by the generator.
Claim 4
Dependent Claim
29 words
The ultrasonic surgical system according to claim 2 , further including means for measuring impedance passing through the instrument and controlling the power level based upon the measured impedance.
Claim 5
Dependent Claim
29 words
The ultrasonic surgical system according to claim 3 , wherein the means for controlling the power level includes adjusting current passing through the instrument based upon the measured impedance.
Claim 6
Dependent Claim
24 words
The ultrasonic surgical system according to claim 1 , wherein voltage supplied by the generator is increased as the force applied continues to increase.
Claim 7
Dependent Claim
29 words
The ultrasonic surgical system according to claim 3 , further including means for measuring impedance passing through the instrument and controlling the power level based upon the measured impedance.
Claim 8
Dependent Claim
29 words
The ultrasonic surgical system according to claim 6 , wherein the means for controlling the power level includes adjusting current passing through the instrument based upon the measured impedance.
Claim 9
Dependent Claim
25 words
The ultrasonic surgical system according to claim 1 , further including means for balancing vibration levels of the instrument with pressure applied by the instrument.
References Cited (Backward Citations)
US4371816A
Cited
US4246490A
Cited
US4731545A
Cited
US5520633A
Cited
US6063098A
Cited
US5989275A
Cited
US5897569A
Cited
US6053906A
Cited
US5893835A
Cited
US6068647A
Cited
US6458142B1
Cited
US6633234B2
Cited
US6679899B2
Cited
US7004174B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2011-02-25 | 2011-08-27 | 2012-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2015-02-25 | 2015-08-27 | 2016-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2019-02-25 | 2019-08-27 | 2020-02-26 | $7700.00 | Window Closed / Lapsed |