Patent ID: 11896294
Assignee: NUVAIRA, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 9:
10. A method for ablating target tissue of an airway of a patient, the method comprising:
providing a catheter assembly including an ablation assembly coupled to the distal end of the elongate shaft, the ablation assembly being configured to be positioned within the airway to deliver energy to the target tissue, the ablation assembly including an energy emitter;
positioning the ablation assembly within the airway such that the energy emitter is in contact with surface tissue of an airway wall of the airway;
causing the energy emitter to deliver energy to the airway wall for a treatment time to ablate the target tissue; and
during energy delivery, varying current to the energy emitter to achieve a predetermined output value during at least a portion of the treatment time, wherein the predetermined output value is a current target, the method further comprising:
measuring an impedance of tissue in contact with the energy emitter during the treatment time;
holding the current constant if a predetermined impedance target is reached before the current target is reached; and
varying the power to achieve the current target if the predetermined impedance target is not met during the treatment time wherein the predetermined impedance target is a percent impedance drop calculated by:, %
    ⁢
       
    Impedance
    ⁢
       
    Drop
   
   =
   
    
     
      
       
        RT
        ⁢
        0
       
       -
       RTactual
      
      
       R
       ⁢
       T
       ⁢
       0
      
     
     ·
     100
    
    ⁢
    %
   
  
  ,, in which RTO is an impedance at a beginning of the treatment time, and RTactual is an impedance at a time t during the treatment time.