{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+Protocol&page=4",
    "query": {
      "intervention": "Observational Protocol",
      "page": 4
    },
    "page_size": 10
  },
  "pagination": {
    "page": 4,
    "page_size": 10,
    "total_count": 258,
    "total_pages": 26,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+Protocol&page=5&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+Protocol&page=3&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-31T19:51:51.899Z",
  "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": "NCT05257551",
      "title": "Tempus Small Cell Lung Cancer Observational Study (Sculptor)",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Small Cell Lung Cancer"
      ],
      "interventions": [
        {
          "name": "Observation",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Tempus AI",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 200,
      "start_date": "2022-07-13",
      "completion_date": "2029-03",
      "has_results": false,
      "last_update_posted_date": "2026-06-15",
      "last_synced_at": "2026-10-31T19:51:51.899Z",
      "location_count": 11,
      "location_summary": "Los Alamitos, California • Aurora, Colorado • Peoria, Illinois + 7 more",
      "locations": [
        {
          "city": "Los Alamitos",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Peoria",
          "state": "Illinois"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Englewood",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05257551"
    },
    {
      "nct_id": "NCT02087813",
      "title": "Pilot Study of alpha1-antitrypsin to Treat Neuromyelitis Optica Relapses",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Neuromyelitis Optica"
      ],
      "interventions": [
        {
          "name": "Alpha1-antitrypsin",
          "type": "DRUG"
        },
        {
          "name": "methylprednisolone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 0,
      "start_date": "2014-03",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2019-04-12",
      "last_synced_at": "2026-10-31T19:51:51.899Z",
      "location_count": 1,
      "location_summary": "Stanford, California",
      "locations": [
        {
          "city": "Stanford",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02087813"
    },
    {
      "nct_id": "NCT03650413",
      "title": "An Extension Study to Evaluate the Long-Term Safety and Tolerability of UTTR1147A in Participants With Moderate to Severe Ulcerative Colitis or Crohn's Disease",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Ulcerative Colitis",
        "Crohn's Disease"
      ],
      "interventions": [
        {
          "name": "UTTR1147A",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Genentech, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 143,
      "start_date": "2019-01-14",
      "completion_date": "2022-07-12",
      "has_results": true,
      "last_update_posted_date": "2023-09-29",
      "last_synced_at": "2026-10-31T19:51:51.899Z",
      "location_count": 1,
      "location_summary": "Greenville, North Carolina",
      "locations": [
        {
          "city": "Greenville",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03650413"
    },
    {
      "nct_id": "NCT03211897",
      "title": "Olanzapine, Haloperidol, Ziprasidone, Midazolam for Acute Undifferentiated Agitation",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Agitation,Psychomotor"
      ],
      "interventions": [
        {
          "name": "Haloperidol Injection",
          "type": "DRUG"
        },
        {
          "name": "Ziprasidone Injection",
          "type": "DRUG"
        },
        {
          "name": "OLANZapine Injection",
          "type": "DRUG"
        },
        {
          "name": "Midazolam injection",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hennepin Healthcare Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 737,
      "start_date": "2017-06-15",
      "completion_date": "2017-10-01",
      "has_results": false,
      "last_update_posted_date": "2018-03-16",
      "last_synced_at": "2026-10-31T19:51:51.899Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03211897"
    },
    {
      "nct_id": "NCT07728708",
      "title": "Effects of Axatilimab on Skin in Chronic Graft-versus-Host Disease",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Chronic Graft vs. Host Disease",
        "GVHD",
        "cGVHD",
        "Graft Versus Host Disease in Skin"
      ],
      "interventions": [
        {
          "name": "Axatilimab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Northwestern University",
      "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": "2026-11",
      "completion_date": "2027-12",
      "has_results": false,
      "last_update_posted_date": "2026-09-22",
      "last_synced_at": "2026-10-31T19:51:51.899Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07728708"
    },
    {
      "nct_id": "NCT03884400",
      "title": "Distribution of Biospecimens From Biorepositories/Biobanks for Research Use",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cancer",
        "Pregnancy Related",
        "Gastro-Intestinal Disorder",
        "Cardio-Respiratory Distress",
        "Women's Health: Endometriosis",
        "Autoimmune Diseases",
        "Nephritis",
        "Healthy",
        "Neuro-Degenerative Disease"
      ],
      "interventions": [
        {
          "name": "Specimens obtained from surgical, phlebotomy or other non-invasive procedure",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "iSpecimen Inc",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 0,
      "start_date": "2021-01-01",
      "completion_date": "2026-03-01",
      "has_results": false,
      "last_update_posted_date": "2022-11-14",
      "last_synced_at": "2026-10-31T19:51:51.899Z",
      "location_count": 1,
      "location_summary": "Lexington, Massachusetts",
      "locations": [
        {
          "city": "Lexington",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03884400"
    },
    {
      "nct_id": "NCT07652034",
      "title": "EMBRACE-OBS: Single-Site Observational Registry of Patient-Reported Outcomes Following MMA Embolization for Migraine",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Migraine Disorders",
        "Chronic Migraine Headache",
        "Migraine"
      ],
      "interventions": [
        {
          "name": "Middle Meningeal Artery Embolization",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Cortex Neurovascular",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "18 Years to 64 Years"
      },
      "enrollment_count": 50,
      "start_date": "2026-09-01",
      "completion_date": "2028-06-01",
      "has_results": false,
      "last_update_posted_date": "2026-09-23",
      "last_synced_at": "2026-10-31T19:51:51.899Z",
      "location_count": 1,
      "location_summary": "Tacoma, Washington",
      "locations": [
        {
          "city": "Tacoma",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07652034"
    },
    {
      "nct_id": "NCT01584037",
      "title": "Adenovirus Vaccine Pregnancy Registry",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Adenovirus"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Teva Branded Pharmaceutical Products R&D, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "17 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "17 Years to 50 Years · Female only"
      },
      "enrollment_count": 0,
      "start_date": "2011-12",
      "completion_date": "2014-04",
      "has_results": false,
      "last_update_posted_date": "2014-04-21",
      "last_synced_at": "2026-10-31T19:51:51.899Z",
      "location_count": 1,
      "location_summary": "Wilmington, North Carolina",
      "locations": [
        {
          "city": "Wilmington",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01584037"
    },
    {
      "nct_id": "NCT04558307",
      "title": "Feasibility of Rapid COVID-19 Testing in Disadvantaged Populations",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Coronavirus Disease (COVID-19)"
      ],
      "interventions": [
        {
          "name": "Pilot a rapid SARS-CoV-2 testing strategy",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Community-driven messages to promote COVID-19 testing",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST",
        "OTHER"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 1000,
      "start_date": "2020-06-03",
      "completion_date": "2021-06-01",
      "has_results": false,
      "last_update_posted_date": "2021-07-13",
      "last_synced_at": "2026-10-31T19:51:51.899Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04558307"
    },
    {
      "nct_id": "NCT02660398",
      "title": "Incidence and Severity of Residual Neuromuscular Blockade",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Residual Neuromuscular Blockade"
      ],
      "interventions": [
        {
          "name": "Standardized NMBD Management",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 78,
      "start_date": "2016-01",
      "completion_date": "2017-01",
      "has_results": false,
      "last_update_posted_date": "2019-05-20",
      "last_synced_at": "2026-10-31T19:51:51.899Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02660398"
    }
  ]
}