{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Blood+samples+collected&page=31",
    "query": {
      "intervention": "Blood samples collected",
      "page": 31
    },
    "page_size": 10
  },
  "pagination": {
    "page": 31,
    "page_size": 10,
    "total_count": 4260,
    "total_pages": 426,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Blood+samples+collected&page=32&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Blood+samples+collected&page=30&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-15T04:41:53.184Z",
  "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": "NCT03734822",
      "title": "Comparative Analysis of CO2 Monitoring Methods in Patients With CF Undergoing General Anesthesia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cystic Fibrosis"
      ],
      "interventions": [
        {
          "name": "End tidal CO2 (EtCO2)",
          "type": "OTHER"
        },
        {
          "name": "Transcutaneous CO2 (TCO2)",
          "type": "DEVICE"
        },
        {
          "name": "Capillary CO2 (CapCO2)",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Arterial blood gas (ABG)",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DEVICE",
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Nationwide Children's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 47,
      "start_date": "2016-03-10",
      "completion_date": "2017-12-20",
      "has_results": true,
      "last_update_posted_date": "2019-03-14",
      "last_synced_at": "2026-10-15T04:41:53.184Z",
      "location_count": 1,
      "location_summary": "Columbus, Ohio",
      "locations": [
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03734822"
    },
    {
      "nct_id": "NCT03372902",
      "title": "Development Of A Blood Test To Improve The Performance Of Breast Cancer Screening",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Breast Cancer",
        "Breast Benign"
      ],
      "interventions": [
        {
          "name": "Breast MRI",
          "type": "DEVICE"
        },
        {
          "name": "Breast Mammogram",
          "type": "DEVICE"
        },
        {
          "name": "Blood draw",
          "type": "OTHER"
        },
        {
          "name": "Breast Biopsy",
          "type": "PROCEDURE"
        },
        {
          "name": "online participant reported questionnaire",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "OTHER",
        "PROCEDURE",
        "BEHAVIORAL"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 628,
      "start_date": "2017-12-07",
      "completion_date": "2025-03-12",
      "has_results": false,
      "last_update_posted_date": "2025-03-14",
      "last_synced_at": "2026-10-15T04:41:53.184Z",
      "location_count": 7,
      "location_summary": "Hartford, Connecticut • Miami, Florida • Basking Ridge, New Jersey + 4 more",
      "locations": [
        {
          "city": "Hartford",
          "state": "Connecticut"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Basking Ridge",
          "state": "New Jersey"
        },
        {
          "city": "Middletown",
          "state": "New Jersey"
        },
        {
          "city": "Commack",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03372902"
    },
    {
      "nct_id": "NCT04216342",
      "title": "Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of Fx-5A in Healthy Volunteers",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Cardiovascular Disease"
      ],
      "interventions": [
        {
          "name": "Fx-5A peptide complex",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "National Heart, Lung, and Blood Institute (NHLBI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "18 Years to 99 Years"
      },
      "enrollment_count": 64,
      "start_date": "2021-09-29",
      "completion_date": "2027-06-30",
      "has_results": false,
      "last_update_posted_date": "2026-10-08",
      "last_synced_at": "2026-10-15T04:41:53.184Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04216342"
    },
    {
      "nct_id": "NCT06328686",
      "title": "Arginine and Whole Brain Radiation Therapy for the Treatment of Patients With Brain Metastases",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Metastatic Malignant Neoplasm in the Brain",
        "Metastatic Malignant Solid Neoplasm"
      ],
      "interventions": [
        {
          "name": "Arginine",
          "type": "DRUG"
        },
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Computed Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Magnetic Resonance Imaging",
          "type": "PROCEDURE"
        },
        {
          "name": "Spectroscopy",
          "type": "PROCEDURE"
        },
        {
          "name": "Whole-Brain Radiotherapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE",
        "RADIATION"
      ],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 10,
      "start_date": "2024-09-05",
      "completion_date": "2028-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-10-13",
      "last_synced_at": "2026-10-15T04:41:53.184Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06328686"
    },
    {
      "nct_id": "NCT01445327",
      "title": "Predictors of Tumor Response and of Radiation Therapy Side Effects in Patients With Gastrointestinal Cancers",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Esophageal Cancer",
        "Stomach Cancer",
        "Pancreatic Cancer"
      ],
      "interventions": [
        {
          "name": "Specimen collection",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 9,
      "start_date": "2007-02-20",
      "completion_date": "2014-05-22",
      "has_results": true,
      "last_update_posted_date": "2022-02-01",
      "last_synced_at": "2026-10-15T04:41:53.184Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01445327"
    },
    {
      "nct_id": "NCT03938870",
      "title": "CNS Tau Kinetics in Healthy Aging and Alzheimer's Disease",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Alzheimer's Disease",
        "Brain Diseases",
        "Central Nervous System Diseases",
        "Delirium, Dementia, Amnestic, Cognitive Disorders",
        "Dementia",
        "Mental Disorders",
        "Nervous System Diseases",
        "Neurodegenerative Diseases",
        "Tauopathies"
      ],
      "interventions": [
        {
          "name": "L-Leucine 13C6",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 96,
      "start_date": "2015-08-18",
      "completion_date": "2023-07-06",
      "has_results": false,
      "last_update_posted_date": "2024-02-13",
      "last_synced_at": "2026-10-15T04:41:53.184Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03938870"
    },
    {
      "nct_id": "NCT06713473",
      "title": "Reducing Self-Dehumanization to Examine Oxytocin and Suicide Risk",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Rehumanization Intervention",
        "Control Intervention"
      ],
      "interventions": [
        {
          "name": "Rehumanized Intervention",
          "type": "OTHER"
        },
        {
          "name": "Control Intervention",
          "type": "OTHER"
        },
        {
          "name": "Clinical Interview",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Self-Report Measures",
          "type": "OTHER"
        },
        {
          "name": "Blood Draw",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Florida State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 50,
      "start_date": "2026-08",
      "completion_date": "2028-08",
      "has_results": false,
      "last_update_posted_date": "2025-12-09",
      "last_synced_at": "2026-10-15T04:41:53.184Z",
      "location_count": 1,
      "location_summary": "Tallahassee, Florida",
      "locations": [
        {
          "city": "Tallahassee",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06713473"
    },
    {
      "nct_id": "NCT04828551",
      "title": "Noninvasive Biomarkers of Metabolic Liver Disease 1.1",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Nonalcoholic Steatohepatitis",
        "Nonalcoholic Fatty Liver"
      ],
      "interventions": [
        {
          "name": "Ultrasound based shear wave speed and fat quantification methods",
          "type": "DEVICE"
        },
        {
          "name": "Blood collection",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Physical measurements",
          "type": "OTHER"
        },
        {
          "name": "Clinical history and medication reviews",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "DIAGNOSTIC_TEST",
        "OTHER"
      ],
      "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": 40,
      "start_date": "2021-03-18",
      "completion_date": "2021-11-20",
      "has_results": true,
      "last_update_posted_date": "2023-07-11",
      "last_synced_at": "2026-10-15T04:41:53.184Z",
      "location_count": 2,
      "location_summary": "San Diego, California • Boston, Massachusetts",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04828551"
    },
    {
      "nct_id": "NCT01729130",
      "title": "Adipose Tissue Function After Pancreas Transplantation",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Diabetes Mellitus, Type 2",
        "Diabetes Mellitus, Type 1",
        "End Stage Renal Disease"
      ],
      "interventions": [
        {
          "name": "Adipose tissue biopsy",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "The University of Texas Medical Branch, Galveston",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 15,
      "start_date": "2009-09",
      "completion_date": "2019-02-19",
      "has_results": false,
      "last_update_posted_date": "2019-03-01",
      "last_synced_at": "2026-10-15T04:41:53.184Z",
      "location_count": 1,
      "location_summary": "Galveston, Texas",
      "locations": [
        {
          "city": "Galveston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01729130"
    },
    {
      "nct_id": "NCT06191575",
      "title": "7 Tesla MRI Neuroimaging in Testicular Cancer Patients With Hypogonadism and on Androgen Replacement Therapy",
      "overall_status": "SUSPENDED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hypogonadism",
        "Malignant Testicular Germ Cell Tumor"
      ],
      "interventions": [
        {
          "name": "7 Tesla Magnetic Resonance Imaging",
          "type": "PROCEDURE"
        },
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Cognitive Assessment",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "University of Southern California",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 10,
      "start_date": "2022-11-29",
      "completion_date": "2027-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-06-05",
      "last_synced_at": "2026-10-15T04:41:53.184Z",
      "location_count": 2,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06191575"
    }
  ]
}