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Vapor treatment of lung nodules and tumors

  • US 10,485,604 B2
  • Filed: 12/02/2015
  • Issued: 11/26/2019
  • Est. Priority Date: 12/02/2014
  • Status: Active Grant
First Claim
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1. A method of treating a lesion in a lung of a patient, the method comprising:

  • navigating a vapor exit port of a vapor delivery catheter along an airway and to a point near a lung region in which the lesion resides, and in which the lung region can be isolated from a portion of the airway, wherein the lung region comprises a lung segment, subsegment or sub-subsegment having segmental boundaries encompassing both the lesion and healthy tissue surrounding the lesion and extending to the segmental boundaries;

    delivering condensable vapor from the exit port of the vapor delivery catheter for a first treatment time into said lung region sufficient to create a uniform field of necrosis in the lesion, the healthy tissue around the lesion and along said segmental boundaries by allowing the condensable vapor to condense; and

    determining, prior to the step of delivering, a first amount of energy to cause said uniform field of necrosis in the healthy tissue around the lesion, and to cause a well-defined ablation boundary between the uniform field of necrosis in the healthy tissue around the lesion and healthy non-targeted tissue along the segmental boundaries; and

    wherein the determining step is based on an airway diameter at said point.

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