{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Blood+samples+collected&page=74",
    "query": {
      "intervention": "Blood samples collected",
      "page": 74
    },
    "page_size": 10
  },
  "pagination": {
    "page": 74,
    "page_size": 10,
    "total_count": 4267,
    "total_pages": 427,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Blood+samples+collected&page=75&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Blood+samples+collected&page=73&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-23T16:18:22.659Z",
  "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": "2026-10-23T16:18:22.659Z",
      "location_count": 1,
      "location_summary": "Columbus, Ohio",
      "locations": [
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03734822"
    },
    {
      "nct_id": "NCT04166539",
      "title": "Neurotoxicity and Cardiotoxicity in Total Joint Arthroplasty",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Metallosis",
        "Pain",
        "Total Hip Replacement",
        "Total Knee Replacement"
      ],
      "interventions": [
        {
          "name": "Questionnaires",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Interviews",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Blood draw",
          "type": "OTHER"
        },
        {
          "name": "Magnetic Resonance Imaging",
          "type": "RADIATION"
        },
        {
          "name": "Echocardiogram",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER",
        "RADIATION",
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Mayo Clinic",
      "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": 115,
      "start_date": "2019-10-01",
      "completion_date": "2021-09-27",
      "has_results": false,
      "last_update_posted_date": "2021-12-08",
      "last_synced_at": "2026-10-23T16:18:22.659Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04166539"
    },
    {
      "nct_id": "NCT05733351",
      "title": "Vudalimab (XmAb20717) in Combination With Standard of Care Treatment in Patients With Metastatic Castration Sensitive Prostate Cancer",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Castration-Sensitive Prostate Carcinoma",
        "Metastatic Prostate Adenocarcinoma",
        "Stage IVB Prostate Cancer AJCC v8"
      ],
      "interventions": [
        {
          "name": "Abiraterone",
          "type": "DRUG"
        },
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Bone Scan",
          "type": "PROCEDURE"
        },
        {
          "name": "Computed Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Docetaxel",
          "type": "DRUG"
        },
        {
          "name": "Enzalutamide",
          "type": "DRUG"
        },
        {
          "name": "FDG-Positron Emission Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Magnetic Resonance Imaging",
          "type": "PROCEDURE"
        },
        {
          "name": "PSMA PET Scan",
          "type": "PROCEDURE"
        },
        {
          "name": "Vudalimab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "Emory University",
      "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": 4,
      "start_date": "2023-08-03",
      "completion_date": "2025-06-12",
      "has_results": false,
      "last_update_posted_date": "2025-09-15",
      "last_synced_at": "2026-10-23T16:18:22.659Z",
      "location_count": 2,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05733351"
    },
    {
      "nct_id": "NCT07227753",
      "title": "The Association Between Gut Microbiota Diversity and Postpartum Depression",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Depression During Pregnancy"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Massachusetts General Hospital",
      "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": 30,
      "start_date": "2025-11-17",
      "completion_date": "2026-04-08",
      "has_results": false,
      "last_update_posted_date": "2026-06-08",
      "last_synced_at": "2026-10-23T16:18:22.659Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07227753"
    },
    {
      "nct_id": "NCT01501929",
      "title": "Effects of Nebivolol on Skeletal Muscle During Exercise in Hypertensive Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Metoprolol succinate",
          "type": "DRUG"
        },
        {
          "name": "Nebivolol",
          "type": "DRUG"
        },
        {
          "name": "Non-invasive measurement of Cardiac Output (CO)",
          "type": "PROCEDURE"
        },
        {
          "name": "Endothelial cell collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Microvascular perfusion assessment using Definity",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "University of Texas Southwestern Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 32,
      "start_date": "2010-08",
      "completion_date": "2015-12",
      "has_results": true,
      "last_update_posted_date": "2018-11-06",
      "last_synced_at": "2026-10-23T16:18:22.659Z",
      "location_count": 1,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01501929"
    },
    {
      "nct_id": "NCT00866957",
      "title": "Human Liver Explants for HIF-1 Alpha Analysis/Comparison (HIF HCC)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Liver Cancer"
      ],
      "interventions": [
        {
          "name": "Blood draw",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "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": 180,
      "start_date": "2006-02",
      "completion_date": "2019-07",
      "has_results": false,
      "last_update_posted_date": "2023-11-18",
      "last_synced_at": "2026-10-23T16:18:22.659Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00866957"
    },
    {
      "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": "2026-10-23T16:18:22.659Z",
      "location_count": 1,
      "location_summary": "Columbia, Missouri",
      "locations": [
        {
          "city": "Columbia",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07083557"
    },
    {
      "nct_id": "NCT01995175",
      "title": "A Prospective, Epidemiological Study to Assess the Disease Burden of Respiratory Syncytial Virus Associated, Suspected Lower Respiratory Tract Infections in Newborns, From 0 to 2 Years of Age and Risk of Development of Wheeze and Asthma From 0 to 6 Years of Age",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Respiratory Syncytial Virus"
      ],
      "interventions": [
        {
          "name": "Nasal swab sampling",
          "type": "PROCEDURE"
        },
        {
          "name": "Blood sampling",
          "type": "PROCEDURE"
        },
        {
          "name": "Diary cards",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "6 Years",
        "sex": "ALL",
        "summary": "Up to 6 Years"
      },
      "enrollment_count": 2409,
      "start_date": "2013-12-12",
      "completion_date": "2021-11-03",
      "has_results": true,
      "last_update_posted_date": "2022-11-29",
      "last_synced_at": "2026-10-23T16:18:22.659Z",
      "location_count": 9,
      "location_summary": "Oakland, California • Sacramento, California • Santa Clara, California + 5 more",
      "locations": [
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Santa Clara",
          "state": "California"
        },
        {
          "city": "Walnut Creek",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01995175"
    },
    {
      "nct_id": "NCT00977457",
      "title": "Genetic Testing in Predicting Biomarkers of Recurrence in Patients With Prostate Cancer Undergoing Surgery",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "DNA analysis",
          "type": "GENETIC"
        },
        {
          "name": "DNA methylation analysis",
          "type": "GENETIC"
        },
        {
          "name": "RNA analysis",
          "type": "GENETIC"
        },
        {
          "name": "gene expression analysis",
          "type": "GENETIC"
        },
        {
          "name": "polymerase chain reaction",
          "type": "GENETIC"
        },
        {
          "name": "diagnostic laboratory biomarker analysis",
          "type": "OTHER"
        },
        {
          "name": "therapeutic conventional surgery",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "GENETIC",
        "OTHER",
        "PROCEDURE"
      ],
      "sponsor": "City of Hope Medical Center",
      "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": 1045,
      "start_date": "2007-11-26",
      "completion_date": "2027-06-30",
      "has_results": false,
      "last_update_posted_date": "2026-08-20",
      "last_synced_at": "2026-10-23T16:18:22.659Z",
      "location_count": 1,
      "location_summary": "Duarte, California",
      "locations": [
        {
          "city": "Duarte",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00977457"
    },
    {
      "nct_id": "NCT04811963",
      "title": "SpO2 Accuracy Low Saturation Validation of the OxySoftN Sensor",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hypoxia",
        "Desaturation of Blood"
      ],
      "interventions": [
        {
          "name": "Non-Invasive Controlled Hypoxia",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Medtronic - MITG",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 10,
      "start_date": "2021-04-06",
      "completion_date": "2021-04-09",
      "has_results": false,
      "last_update_posted_date": "2021-05-18",
      "last_synced_at": "2026-10-23T16:18:22.659Z",
      "location_count": 1,
      "location_summary": "Louisville, Colorado",
      "locations": [
        {
          "city": "Louisville",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04811963"
    }
  ]
}