Patent ID: 11937913
Assignee: PULMONX CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 16:
17. A system for determining a disease state of a portion of a lung in a patient, the system comprising:
a catheter configured to be introduced into an airway leading to a targeted lung compartment, the catheter comprising a distal end, a proximal end, and a lumen therebetween, wherein the distal end comprises an expandable occluding element which is configured to sealingly engage the airway, wherein the proximal end comprises an inflation port to expand the occluding element, wherein the lumen is in-line with at least one sensor for measuring flow or volume to or from the targeted lung compartment;
a display configured to display data generated from a diagnostic procedure performed with the catheter to determine a disease state of the targeted lung compartment; and
a control unit coupled to the catheter and the display, wherein the control unit is configured to:
measure flow or volume to the targeted lung compartment of the patient during inhalation;
measure flow or volume from the targeted lung compartment of the patient during exhalation;
determine a peak volume at end of inhalation;
determine an expiratory volume and a rate of change in volume based on the measured flow or volume from the targeted lung compartment during exhalation; and
determine a disease state of the targeted lung compartment by comparing the expiratory volume and the rate of change in volume for the peak volume for the targeted lung compartment to the expiratory volume and the rate of change in volume for the peak volume for one or more additional lung compartments within a same patient;
wherein the disease state of the targeted lung compartment is a monitored state if an expiratory volume for the peak volume for the targeted lung compartment falls within a threshold range in a determined time period and a rate of change in volume for the peak volume for the targeted lung compartment remains below a threshold value in the determined time period.