{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=CO2&page=2",
    "query": {
      "intervention": "CO2",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=CO2&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-19T12:42:36.438Z",
  "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": "NCT02473354",
      "title": "Predictors of Opioid-Induced Respiratory Depression (OIRD)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Respiratory Depression"
      ],
      "interventions": [
        {
          "name": "Remifentanil",
          "type": "DRUG"
        },
        {
          "name": "Oxygen",
          "type": "DRUG"
        },
        {
          "name": "Carbon dioxide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 30,
      "start_date": "2015-04",
      "completion_date": "2018-04-29",
      "has_results": false,
      "last_update_posted_date": "2020-03-10",
      "last_synced_at": "2026-09-19T12:42:36.438Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02473354"
    },
    {
      "nct_id": "NCT01523275",
      "title": "Study of Mitomycin-C Application in Laryngotracheal Stenosis",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Laryngeal Stenosis",
        "Subglottic Stenosis",
        "Tracheal Stenosis"
      ],
      "interventions": [
        {
          "name": "Mitomycin -C",
          "type": "DRUG"
        },
        {
          "name": "Saline application",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 15,
      "start_date": "2012-08",
      "completion_date": "2018-02",
      "has_results": true,
      "last_update_posted_date": "2019-05-22",
      "last_synced_at": "2026-09-19T12:42:36.438Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01523275"
    },
    {
      "nct_id": "NCT01477177",
      "title": "Polar Wand Carbon Dioxide Cryotherapy for Barrett's Esophagus",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Barrett's Esophagus"
      ],
      "interventions": [
        {
          "name": "Polar Wand carbon dioxide cryotherapy",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "98 Years",
        "sex": "ALL",
        "summary": "18 Years to 98 Years"
      },
      "enrollment_count": 4,
      "start_date": "2011-08",
      "completion_date": "2014-04",
      "has_results": true,
      "last_update_posted_date": "2019-05-15",
      "last_synced_at": "2026-09-19T12:42:36.438Z",
      "location_count": 1,
      "location_summary": "Jacksonville, Florida",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01477177"
    },
    {
      "nct_id": "NCT01665560",
      "title": "Neural, Behavioral and Physiological Correlates of Feeding in Humans",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Magnetic Resonance Imaging, Functional"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Yale University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "ALL",
        "summary": "18 Years to 45 Years"
      },
      "enrollment_count": 27,
      "start_date": "2005-06",
      "completion_date": "2009-07",
      "has_results": false,
      "last_update_posted_date": "2012-08-15",
      "last_synced_at": "2026-09-19T12:42:36.438Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01665560"
    },
    {
      "nct_id": "NCT06578468",
      "title": "End-Tidal Oxygen for Intubation in the Emergency Department",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Critical Illness",
        "Hypoxia",
        "Respiratory Failure"
      ],
      "interventions": [
        {
          "name": "End-tidal oxygen monitor",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Sydney Local Health District",
      "sponsor_class": "OTHER_GOV",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1400,
      "start_date": "2024-08-05",
      "completion_date": "2025-12-31",
      "has_results": false,
      "last_update_posted_date": "2024-09-19",
      "last_synced_at": "2026-09-19T12:42:36.438Z",
      "location_count": 3,
      "location_summary": "Minneapolis, Minnesota • Albuquerque, New Mexico • The Bronx, New York",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        },
        {
          "city": "Albuquerque",
          "state": "New Mexico"
        },
        {
          "city": "The Bronx",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06578468"
    },
    {
      "nct_id": "NCT06275308",
      "title": "Effect of Raised End-Tidal pCo2 on Choroidal Volume",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Intraocular Pressure"
      ],
      "interventions": [
        {
          "name": "Ventilation manipulation",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Pittsburgh",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "8 Years",
        "sex": "ALL",
        "summary": "Up to 8 Years"
      },
      "enrollment_count": 20,
      "start_date": "2023-02-27",
      "completion_date": "2026-12-30",
      "has_results": false,
      "last_update_posted_date": "2026-01-09",
      "last_synced_at": "2026-09-19T12:42:36.438Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06275308"
    },
    {
      "nct_id": "NCT07357090",
      "title": "Carbon Dioxide Administration and Brain Waste Clearance",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Traumatic Brain Injury",
        "Aging Disorder",
        "Magnetic Resonance Imaging (MRI)"
      ],
      "interventions": [
        {
          "name": "Hypercapnia task performed during fMRI",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Andrew Mayer",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "82 Years",
        "sex": "ALL",
        "summary": "18 Years to 82 Years"
      },
      "enrollment_count": 200,
      "start_date": "2026-04",
      "completion_date": "2032-02",
      "has_results": false,
      "last_update_posted_date": "2026-02-23",
      "last_synced_at": "2026-09-19T12:42:36.438Z",
      "location_count": 1,
      "location_summary": "Albuquerque, New Mexico",
      "locations": [
        {
          "city": "Albuquerque",
          "state": "New Mexico"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07357090"
    },
    {
      "nct_id": "NCT03018548",
      "title": "Improvised Explosive Device (IED) Level Blasting of Human Blood With Slosh Prevention",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Brain Injuries"
      ],
      "interventions": [
        {
          "name": "blood draw",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Children's Hospital Medical Center, Cincinnati",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 40,
      "start_date": "2016-01",
      "completion_date": "2016-12",
      "has_results": false,
      "last_update_posted_date": "2020-08-24",
      "last_synced_at": "2026-09-19T12:42:36.438Z",
      "location_count": 1,
      "location_summary": "Cincinnati, Ohio",
      "locations": [
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03018548"
    },
    {
      "nct_id": "NCT02653638",
      "title": "Blood Brain Flow and Exercise",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Cerebrovascular Circulation"
      ],
      "interventions": [
        {
          "name": "Control",
          "type": "OTHER"
        },
        {
          "name": "Indomethacin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DRUG"
      ],
      "sponsor": "University of Wisconsin, Madison",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 80,
      "start_date": "2016-06",
      "completion_date": "2019-04",
      "has_results": false,
      "last_update_posted_date": "2019-12-18",
      "last_synced_at": "2026-09-19T12:42:36.438Z",
      "location_count": 1,
      "location_summary": "Madison, Wisconsin",
      "locations": [
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02653638"
    },
    {
      "nct_id": "NCT05304000",
      "title": "Psychophysiological Effects of Controlled Respiration and Mindfulness",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Stress, Physiological",
        "Stress, Emotional",
        "Insomnia"
      ],
      "interventions": [
        {
          "name": "Mindfulness Meditation",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Cyclic Sighing Breathing",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Box Breathing",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Cyclic Hyperventilation with Retention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 108,
      "start_date": "2020-06-02",
      "completion_date": "2020-09-17",
      "has_results": false,
      "last_update_posted_date": "2022-05-06",
      "last_synced_at": "2026-09-19T12:42:36.438Z",
      "location_count": 2,
      "location_summary": "Palo Alto, California • Stanford, California",
      "locations": [
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05304000"
    }
  ]
}