High-Flow Oxygen in Reducing Shortness of Breath Caused by Exercise in Patients With Cancer

PRIMARY OBJECTIVES:

I. Obtain preliminary estimates of the effect size of oxygen and high flow rate on exertional
dyspnea (modified Borg Scale adjusted for work rate and baseline dyspnea).

SECONDARY OBJECTIVES:

I. Determine the completion rate of a randomized controlled trial of exertional dyspnea in
cancer patients.

II. Obtain preliminary estimates of the effects of oxygen and flow rate on physiologic
function (respiratory rate and oxygen saturation) and exercise capacity (work rate and
exercise duration).

OUTLINE: All patients undergo a baseline structured exercise session with air. Patients are
then randomized to 1 of 4 treatments for a second session approximately 3 days later.

ARM I: Patients receive high-flow oxygen via nasal prongs during a structured stationary
bicycle exercise session.

ARM II: Patients receive high-flow air via nasal prongs during a structured stationary
bicycle exercise session.

ARM III: Patients receive low-flow oxygen via a nasal cannula during a structured stationary
bicycle exercise session.

ARM IV: Patients receive low-flow air via a nasal cannula during structured stationary
bicycle exercise session.

Inclusion Criteria:

- Diagnosis of cancer, with evidence of primary or secondary lung involvement

- Average dyspnea Borg Scale >= 4 of 10 with severe exertion over the past week

- Oxygen saturation > 90% on ambient air at time of assessment

- Able to communicate in English or Spanish

- Karnofsky performance status >= 50%

- Seen at Supportive Care, cardiopulmonary center, thoracic radiation oncology or
thoracic medical oncology

Exclusion Criteria:

- Resting dyspnea modified Borg Scale > 7 of 10 at enrollment

- Severe obstructive lung disease (forced expiratory volume in 1 second [FEV1]/forced
vital capacity [FVC] < 70% post bronchodilator and forced expiratory volume in 1
second < 30% predicted)

- Delirium (i.e., Memorial Delirium Rating Scale > 13)

- History of unstable angina or myocardial infarction in the last week

- Acute pulmonary embolus or pulmonary infarction in the last week

- Thrombosis of lower extremities in the last week

- Acute myocarditis, pericarditis, or endocarditis in the last week

- Symptomatic aortic stenosis or syncope in the last week

- Suspected dissecting aneurysm

- Severe untreated resting arterial hypertension (> 200 mmHg systolic, > 120 mmHg
diastolic) at the time of enrollment

- Uncontrolled arrhythmias causing symptoms or hemodynamic compromise in the last week

- Uncontrolled heart failure in the last week

- Pleural effusion requiring thoracentesis within 1 week of study enrollment or
scheduled during the study period

- Airway obstruction requiring stenting within 1 week of study enrollment or scheduled
during the study period

- Pneumonia requiring antibiotics at the time of study enrollment