A Mechanistic Study of Inhaled Nitric Oxide in COPD

Study Purpose

There is a lack of effective treatments for chronic obstructive pulmonary disease (COPD) complicated with pulmonary hypertension. Previous studies have found that inhaled nitric oxide (iNO) can reduce pulmonary artery pressure and improve exercise capacity in COPD with pulmonary hypertension patients. However, the specific mechanism is unclear. The study aims to evaluate pulmonary ventilation/perfusion, pulmonary artery pressure, oxygenation, symptoms and quality of life in COPD with pulmonary hypertension patients after short-term treatment with iNO. Observing a series of pathophysiological changes caused by the treatment of pulmonary hypertension with iNO in COPD, the investigators hope to provide new theoretical basis and research ideas.

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Eligible Ages 40 Years - 75 Years
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

1. Age ≥ 40 years, ≤ 75 years. 2. Currently smoking or former smokers with at least 10 pack-years of tobacco cigarette smoking history. 3. Diagnosis of moderate and severe COPD by the Global initiative for chronic Obstructive Lung Disease (GOLD) 2022 criteria: A post-bronchodilatory forced expiratory volume in 1 second/forced vital capacity (FEV1/FVC) < 0.7, and 30%< FEV1 < 80% predicted. 4. Echocardiogram with technical adequacy demonstrating with Pulmonary Hypertension: Tricuspid regurgitation velocity (TRV) > 2.8 m/s or pulmonary arterial systolic pressure (sPAP) ≥38mmHg. 5. Signed informed consent prior to the initiation of any study mandated procedures or assessments.

Exclusion Criteria:

1. Experienced an exacerbation requiring start of or increase in systemic oral corticosteroid therapy during the last month. 2. Treatment with antibiotics. 3. Respiratory failure requiring supplemental oxygen therapy. 4. A diagnosis of Interstitial lung disease, asthma, tuberculosis, bronchiectasis, pneumonia, lung cancer, pulmonary embolism, or other non-COPD respiratory disease. 5. Any history of lung resection. 6. Left ventricular dysfunction: left ventricular ejection fraction (LVEF) < 40% 7. Clinically significant valvular heart disease, including aortic valvular disease (moderate or greater aortic stenosis or regurgitation) and/or mitral valve disease (moderate or greater mitral stenosis or regurgitation), or status post mitral valve replacement. 8. Use within 30 days of screening or current use of approved PH medications such as sildenafil, bosentan or prostacyclines. 9. Neuromuscular disease or musculoskeletal injuries that unable to complete exercise trials. 10. Use of investigational drugs or devices within 30 days prior to enrollment into the study. 11. Any underlying medical or psychiatric condition that, in the opinion of the Investigator, makes the subject an unsuitable candidate for the study

Trial Details

Trial ID:

This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.


Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

Principal Investigator Affiliation N/A
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Other, Industry
Overall Status Recruiting
Countries China

The disease, disorder, syndrome, illness, or injury that is being studied.

Chronic Obstructive Pulmonary Disease, Pulmonary Hypertension
Arms & Interventions


Experimental: Inhaled Nitric Oxide (iNO)

iNO 20ppm,≥8 hours/day for 3 days


Device: - Nitric Oxide Generation and Delivery System

The Nitric Oxide Generation and Delivery System is used to deliver nitric oxide for inhalation therapy into the inspiratory limb of the patient breathing circuit in a way that provides a constant concentration of nitric oxide (NO), as set by the user, to the patient throughout the inspired breath.

Contact a Trial Team

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International Sites

China-Japan Friendship Hospital, Beijing, China




China-Japan Friendship Hospital

Beijing, ,

Site Contact




For more information, please contact PHA at Research@PHAssociation.org and refer to the terms of service below.

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