{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Fractional+Exhaled+Nitric+Oxide+%28FENO%29",
    "query": {
      "intervention": "Fractional Exhaled Nitric Oxide (FENO)"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 12,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Fractional+Exhaled+Nitric+Oxide+%28FENO%29&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-10-05T09:56:06.394Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT01648920",
      "title": "A Study to Explore the Utility of Fractional Exhaled Nitric Oxide (FeNO) Compared With Methacholine Challenge (MCC) Testing in the Assessment of Patients With Suspected But Undiagnosed Asthma",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Asthma"
      ],
      "interventions": [
        {
          "name": "NIOX MINO® Instrument (09-1100)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Aerocrine AB",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "7 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "7 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2012-06",
      "completion_date": "2012-11",
      "has_results": true,
      "last_update_posted_date": "2014-04-09",
      "last_synced_at": "2026-10-05T09:56:06.394Z",
      "location_count": 8,
      "location_summary": "Blue Bell, Pennsylvania • Collegeville, Pennsylvania • Doylestown, Pennsylvania + 5 more",
      "locations": [
        {
          "city": "Blue Bell",
          "state": "Pennsylvania"
        },
        {
          "city": "Collegeville",
          "state": "Pennsylvania"
        },
        {
          "city": "Doylestown",
          "state": "Pennsylvania"
        },
        {
          "city": "Jenkintown",
          "state": "Pennsylvania"
        },
        {
          "city": "King of Prussia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01648920"
    },
    {
      "nct_id": "NCT07675044",
      "title": "Quantifying the Burden of Type 2 (T2) Inflammation in Asthma",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Asthma",
        "Type 2 Asthma"
      ],
      "interventions": [
        {
          "name": "FeNO Breath Test",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Icahn School of Medicine at Mount Sinai",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 200,
      "start_date": "2026-07",
      "completion_date": "2027-05",
      "has_results": false,
      "last_update_posted_date": "2026-06-30",
      "last_synced_at": "2026-10-05T09:56:06.394Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07675044"
    },
    {
      "nct_id": "NCT07228026",
      "title": "Use of fenoTRACK Device for Monitoring Changes of Fractional Exhaled Nitric Oxide (FeNO) in Uncontrolled Asthma Subjects and Controlled Asthma Subjects",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Asthma"
      ],
      "interventions": [
        {
          "name": "fenoTRACK Device",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Biometry Inc",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "5 Years to 100 Years"
      },
      "enrollment_count": 160,
      "start_date": "2025-09-17",
      "completion_date": "2026-09-30",
      "has_results": false,
      "last_update_posted_date": "2026-06-02",
      "last_synced_at": "2026-10-05T09:56:06.394Z",
      "location_count": 13,
      "location_summary": "Stockton, California • Panama City, Florida • Columbus, Georgia + 10 more",
      "locations": [
        {
          "city": "Stockton",
          "state": "California"
        },
        {
          "city": "Panama City",
          "state": "Florida"
        },
        {
          "city": "Columbus",
          "state": "Georgia"
        },
        {
          "city": "Bangor",
          "state": "Maine"
        },
        {
          "city": "Ellicott City",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07228026"
    },
    {
      "nct_id": "NCT04450108",
      "title": "Vivatmo Pro™ for Fractional Exhaled Nitric Oxide (FeNO) Monitoring in U.S. Asthmatic Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Asthma",
        "Asthma in Children"
      ],
      "interventions": [
        {
          "name": "Vivatmo pro FeNO Test",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Bosch Healthcare Solutions GmbH",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "7 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "7 Years to 80 Years"
      },
      "enrollment_count": 122,
      "start_date": "2020-09-08",
      "completion_date": "2021-04-13",
      "has_results": true,
      "last_update_posted_date": "2022-06-06",
      "last_synced_at": "2026-10-05T09:56:06.394Z",
      "location_count": 6,
      "location_summary": "Birmingham, Alabama • Bakersfield, California • White Marsh, Maryland + 3 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Bakersfield",
          "state": "California"
        },
        {
          "city": "White Marsh",
          "state": "Maryland"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Raleigh",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04450108"
    },
    {
      "nct_id": "NCT02760329",
      "title": "Observational Study of Obstructive Lung Disease (NOVELTY)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Asthma",
        "COPD",
        "Chronic Obstructive Pulmonary Disease"
      ],
      "interventions": [
        {
          "name": "Blood draw",
          "type": "PROCEDURE"
        },
        {
          "name": "Urine",
          "type": "PROCEDURE"
        },
        {
          "name": "Lung function measurements",
          "type": "PROCEDURE"
        },
        {
          "name": "Fractional Exhaled Nitric Oxide (FENO)",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "130 Years",
        "sex": "ALL",
        "summary": "12 Years to 130 Years"
      },
      "enrollment_count": 12255,
      "start_date": "2016-07-25",
      "completion_date": "2023-05-31",
      "has_results": false,
      "last_update_posted_date": "2024-10-03",
      "last_synced_at": "2026-10-05T09:56:06.394Z",
      "location_count": 40,
      "location_summary": "Loma Linda, California • Long Beach, California • Roseville, California + 33 more",
      "locations": [
        {
          "city": "Loma Linda",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Roseville",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Colorado Springs",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02760329"
    },
    {
      "nct_id": "NCT01729247",
      "title": "Study to Evaluate the Impact of FeNO Assessments on Asthma Management Decisions in Subject 7 to 60 Years of Age",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Asthma"
      ],
      "interventions": [
        {
          "name": "NIOX MINO® Instrument (09-1100)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Aerocrine AB",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "7 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "7 Years to 60 Years"
      },
      "enrollment_count": 50,
      "start_date": "2012-10",
      "completion_date": "2012-11",
      "has_results": true,
      "last_update_posted_date": "2014-03-03",
      "last_synced_at": "2026-10-05T09:56:06.394Z",
      "location_count": 1,
      "location_summary": "Raleigh, North Carolina",
      "locations": [
        {
          "city": "Raleigh",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01729247"
    },
    {
      "nct_id": "NCT05801224",
      "title": "Vascular ARDS Recruitment After Inhaled Nitric Oxide",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Acute Respiratory Distress Syndrome",
        "Ventilation Perfusion Mismatch"
      ],
      "interventions": [
        {
          "name": "Nitric Oxide",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 70,
      "start_date": "2026-07-10",
      "completion_date": "2028-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-10-02",
      "last_synced_at": "2026-10-05T09:56:06.394Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05801224"
    },
    {
      "nct_id": "NCT06675435",
      "title": "Inhaled Nitric Oxide in Severe Obesity",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity",
        "Respiratory Insufficiency",
        "Hypoxemic Respiratory Failure",
        "Nitric Oxide"
      ],
      "interventions": [
        {
          "name": "Nitric oxide",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2026-10",
      "completion_date": "2028-12",
      "has_results": false,
      "last_update_posted_date": "2026-05-20",
      "last_synced_at": "2026-10-05T09:56:06.394Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06675435"
    },
    {
      "nct_id": "NCT06572228",
      "title": "Efficacy of Dupilumab Added to Medium Dose Inhaled Corticosteroid/Long-acting Beta-agonist (ICS/LABA) in Comparison to ICS Dose Escalation to High Dose ICS/LABA in Adolescent and Adult Patients With Uncontrolled Asthma",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Asthma"
      ],
      "interventions": [
        {
          "name": "dupilumab",
          "type": "DRUG"
        },
        {
          "name": "Matching Placebo",
          "type": "DRUG"
        },
        {
          "name": "ICS/LABA",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Regeneron Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "12 Years to 80 Years"
      },
      "enrollment_count": 120,
      "start_date": "2024-08-26",
      "completion_date": "2027-04-24",
      "has_results": false,
      "last_update_posted_date": "2026-05-22",
      "last_synced_at": "2026-10-05T09:56:06.394Z",
      "location_count": 51,
      "location_summary": "Bakersfield, California • La Jolla, California • Lancaster, California + 47 more",
      "locations": [
        {
          "city": "Bakersfield",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Lancaster",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Newport Beach",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06572228"
    },
    {
      "nct_id": "NCT00739531",
      "title": "Measuring Exhaled Nitric Oxide (eNO) Using the Apieron INSIGHT System and the Aerocrine NIOX System",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Asthma"
      ],
      "interventions": [
        {
          "name": "Exhaled nitric oxide (eNO)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Apieron",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "5 Years and older"
      },
      "enrollment_count": 150,
      "start_date": "2007-10",
      "completion_date": "2007-12",
      "has_results": false,
      "last_update_posted_date": "2008-08-21",
      "last_synced_at": "2026-10-05T09:56:06.394Z",
      "location_count": 2,
      "location_summary": "Shreveport, Louisiana • Lake Oswego, Oregon",
      "locations": [
        {
          "city": "Shreveport",
          "state": "Louisiana"
        },
        {
          "city": "Lake Oswego",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00739531"
    }
  ]
}