{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Blood+Collection+and+Assays&page=2",
    "query": {
      "intervention": "Blood Collection and Assays",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 45,
    "total_pages": 5,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Blood+Collection+and+Assays&page=3&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Blood+Collection+and+Assays&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-04T18:28:10.969Z",
  "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": "NCT03404258",
      "title": "ET1 Concentration, Metabolic Pathway Activation, and Pulmonary Blood Flow in Infants Undergoing Superior Cavo-Pulmonary Anastomosis",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Single-ventricle",
        "Pulmonary Vascular Resistance Abnormality",
        "Superior Cavo-Pulmonary Anastomosis",
        "Endothelin",
        "Metabolomics"
      ],
      "interventions": [
        {
          "name": "Research Blood Sampling",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "1 Month",
        "maximum_age": "2 Years",
        "sex": "ALL",
        "summary": "1 Month to 2 Years"
      },
      "enrollment_count": 50,
      "start_date": "2018-02-10",
      "completion_date": "2027-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-05-01",
      "last_synced_at": "2026-10-04T18:28:10.969Z",
      "location_count": 1,
      "location_summary": "Denver, Colorado",
      "locations": [
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03404258"
    },
    {
      "nct_id": "NCT00048971",
      "title": "Genetic Trial to Study Diarrhea in Patients With Stage III Colon Cancer Who Are Receiving Chemotherapy",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Colorectal Cancer",
        "Diarrhea",
        "Neutropenia"
      ],
      "interventions": [
        {
          "name": "mutation analysis",
          "type": "GENETIC"
        },
        {
          "name": "polymorphic microsatellite marker analysis",
          "type": "GENETIC"
        }
      ],
      "intervention_types": [
        "GENETIC"
      ],
      "sponsor": "Alliance for Clinical Trials in Oncology",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 308,
      "start_date": "2002-04",
      "completion_date": "2006-11",
      "has_results": false,
      "last_update_posted_date": "2016-07-06",
      "last_synced_at": "2026-10-04T18:28:10.969Z",
      "location_count": 82,
      "location_summary": "Anniston, Alabama • La Jolla, California • Los Angeles, California + 58 more",
      "locations": [
        {
          "city": "Anniston",
          "state": "Alabama"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00048971"
    },
    {
      "nct_id": "NCT02978118",
      "title": "Exploring Relevant Immune-based Biomarkers and Circulating Tumor Cells During Treatment With Immunotherapy in Genitourinary Malignancies (CTC Immune Based Biomarkers)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Carcinoma, Renal Cell",
        "Carcinoma, Urothelial"
      ],
      "interventions": [
        {
          "name": "Immune cell and CTC detection procedures",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 67,
      "start_date": "2017-03-07",
      "completion_date": "2028-10",
      "has_results": false,
      "last_update_posted_date": "2026-09-03",
      "last_synced_at": "2026-10-04T18:28:10.969Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02978118"
    },
    {
      "nct_id": "NCT00470574",
      "title": "Vaccine Therapy and QS21 in Treating Patients With Metastatic Breast Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "QS21",
          "type": "BIOLOGICAL"
        },
        {
          "name": "sialyl Lewisª-keyhole limpet hemocyanin conjugate vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "immunoenzyme technique",
          "type": "OTHER"
        },
        {
          "name": "immunologic technique",
          "type": "OTHER"
        },
        {
          "name": "laboratory biomarker analysis",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "120 Years",
        "sex": "ALL",
        "summary": "18 Years to 120 Years"
      },
      "enrollment_count": 7,
      "start_date": "2007-03-20",
      "completion_date": "2020-01-24",
      "has_results": true,
      "last_update_posted_date": "2020-11-18",
      "last_synced_at": "2026-10-04T18:28:10.969Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00470574"
    },
    {
      "nct_id": "NCT05504889",
      "title": "Cholesterol and CYP3A4/5 Metabolism Across Pregnancy and Postpartum",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pregnancy Related"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 45 Years · Female only"
      },
      "enrollment_count": 36,
      "start_date": "2022-06-17",
      "completion_date": "2023-06-30",
      "has_results": false,
      "last_update_posted_date": "2024-04-24",
      "last_synced_at": "2026-10-04T18:28:10.969Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05504889"
    },
    {
      "nct_id": "NCT00603967",
      "title": "Effect of Aromatase Inhibitors on Bones and Genes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Breast Cancer",
        "Postmenopausal"
      ],
      "interventions": [
        {
          "name": "Dual x-ray absorptiometry (DXA)",
          "type": "PROCEDURE"
        },
        {
          "name": "Blood draw",
          "type": "PROCEDURE"
        },
        {
          "name": "Questionnaire",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "BEHAVIORAL"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "40 Years and older · Female only"
      },
      "enrollment_count": 151,
      "start_date": "2006-03",
      "completion_date": "2009-10",
      "has_results": false,
      "last_update_posted_date": "2013-05-24",
      "last_synced_at": "2026-10-04T18:28:10.969Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00603967"
    },
    {
      "nct_id": "NCT03802994",
      "title": "Pneumococcal Conjugate Vaccine in Aging Renal Transplant",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Renal Transplantation",
        "Aging"
      ],
      "interventions": [
        {
          "name": "23 valent pneumococcal polysaccharide vaccine",
          "type": "DRUG"
        },
        {
          "name": "13 valent conjugated pneumococcal vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Peripheral blood sample",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "VA Office of Research and Development",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "35 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "35 Years to 75 Years"
      },
      "enrollment_count": 57,
      "start_date": "2018-11-01",
      "completion_date": "2020-02-28",
      "has_results": true,
      "last_update_posted_date": "2021-04-30",
      "last_synced_at": "2026-10-04T18:28:10.969Z",
      "location_count": 2,
      "location_summary": "Charleston, South Carolina",
      "locations": [
        {
          "city": "Charleston",
          "state": "South Carolina"
        },
        {
          "city": "Charleston",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03802994"
    },
    {
      "nct_id": "NCT07579325",
      "title": "Lipid Screening Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Lipoprotein (a)"
      ],
      "interventions": [
        {
          "name": "Venipuncture",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Central Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 35,
      "start_date": "2026-05-05",
      "completion_date": "2026-07-28",
      "has_results": false,
      "last_update_posted_date": "2026-07-30",
      "last_synced_at": "2026-10-04T18:28:10.969Z",
      "location_count": 1,
      "location_summary": "Orlando, Florida",
      "locations": [
        {
          "city": "Orlando",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07579325"
    },
    {
      "nct_id": "NCT07083557",
      "title": "Routine Validation and Reproducibility Testing of Laboratory Assays and Research Techniques Used for Endocrine, Cardiometabolic, and Musculoskeletal Disorder Research (VALD)",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Obesity and Obesity-related Medical Conditions",
        "Diabetes",
        "Atherosclerotic Disease",
        "Heart Failure",
        "MASH",
        "Sarcopenia",
        "Osteoporosis",
        "Hyperparathyroidism",
        "Hypoparathyroidism",
        "Ischemic Heart Disease",
        "Cystic Fibrosis (CF)",
        "Chronic Kidney Disease(CKD)",
        "Osteopenia",
        "Cachexia"
      ],
      "interventions": [
        {
          "name": "Endothelial cell collection",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Bettina Mittendorfer",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "18 Years to 100 Years"
      },
      "enrollment_count": 100,
      "start_date": "2027-01-01",
      "completion_date": "2030-07-01",
      "has_results": false,
      "last_update_posted_date": "2026-05-07",
      "last_synced_at": "2026-10-04T18:28:10.969Z",
      "location_count": 1,
      "location_summary": "Columbia, Missouri",
      "locations": [
        {
          "city": "Columbia",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07083557"
    },
    {
      "nct_id": "NCT00918658",
      "title": "Study of Natural Killer Cells in Bone Marrow and Blood Samples From Patients With and Without Hematologic Cancer",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Leukemia",
        "Multiple Myeloma and Plasma Cell Neoplasm"
      ],
      "interventions": [
        {
          "name": "biologic sample preservation procedure",
          "type": "OTHER"
        },
        {
          "name": "immunologic technique",
          "type": "OTHER"
        },
        {
          "name": "laboratory biomarker analysis",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Case Comprehensive Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 34,
      "start_date": "2008-04",
      "completion_date": "2011-03",
      "has_results": false,
      "last_update_posted_date": "2015-10-09",
      "last_synced_at": "2026-10-04T18:28:10.969Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00918658"
    }
  ]
}