Respiratory Disorders Non-invasive Monitoring of Work of Breathing in Outpatients

Inclusion Criteria

• •Patient seen at the Stanford University Hospital Chest Clinic
• •Patient age 18 or older
• •Patient able to consent
• •Patient with one of the following two medical conditions: Chronic Obstructive Pulmonary - Disease or Asthma
• •Participant (or accompanying family / caretaker) able to speak English
• •Patient is hospitalized
• •Patient is having an acute exacerbation of their respiratory condition
• •Patient is having an acute exacerbation of a comorbid condition
• •Patient has comorbid cardiac disease, including one of the conditions listed below:
• •Arrhythmias (including atrial fibrillation, NSVT, etc.)
• •Congestive Heart Failure
• •Unstable angina
• •Myocardial infarction within the last 3 months prior to enrollment
• •Uncorrected congenital heart disease
• •Uncorrected severe valvular disease
• •Pulmonary Hypertension (moderate or higher grade)
• •Patient has one of the following conditions:
• •Moderate pleural effusion
• •Large pleural effusion
• •Advanced stage lung cancer (Stage III or Stage IV disease)
• •Active infectious process, including viral process or pneumonia
• •Interstitial lung disease
• •Pleural disease, including pleural malignancies, trapped lung, etc
• •Active Cheyne-Stokes respiration
• •Patient has baseline increased work of breathing not due to their underlying respiratory disease (ie. COPD or asthma)
• •Ongoing substance abuse (not including cigarette use)