Control system and process for application of energy to...

Details Control system and process for application of energy to... Control system and process for application of energy to...

2006-09-12

2006-09-12

Peffley, Michael (Department: 3739)

Surgery

Instruments

Electrical application

C606S041000

Reexamination Certificate

active

07104987

ABSTRACT:
The present invention includes a system for delivering energy to an airway wall of a lung comprising an energy delivering apparatus and a PID controller having one or more variable gain factors which are rest after energy deliver has begun. The energy delivering apparatus may include a flexible elongated member and a distal expandable basket having at least one electrode for transferring energy to the airway wall and at least one temperature sensor for measuring temperature. The PID controller determines a new power set point base on an error between a preset temperature and the measured temperature. The algorithm can be Pi+1=Pi+G(αei+βei−1+γei−2) where α, β and γ are preset values and α is from 1 to 2; βis from −1 to −2; and γ is from −0.5 to 0−5. In another variation, the controller is configured to shut down if various measured parameters are exceeded such as, for example, energy, impedance, temperature, temperature differences, activation time and combinations thereof. Methods for treating a target medium using a PID algorithm are also provided.

REFERENCES:
patent: 5688267 (1997-11-01), Panescu et al.
patent: 5702386 (1997-12-01), Stern et al.
patent: 6071281 (2000-06-01), Burnside et al.
patent: 6458121 (2002-10-01), Rosenstock et al.

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