{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational%3A+Blood+Sample+Collection&page=2",
    "query": {
      "intervention": "Observational: Blood Sample Collection",
      "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=Observational%3A+Blood+Sample+Collection&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-23T22:08:36.237Z",
  "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": "NCT06605404",
      "title": "Pan-tumor MRD Study",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Muscle Invasive Bladder Urothelial Carcinoma",
        "Esophageal Cancer",
        "Gastric and Gastroesophageal Junction (GEJ) Adenocarcinoma",
        "Melanoma (Skin Cancer)",
        "NSCLC (Non-small Cell Lung Cancer)",
        "Pancreatic (Exocrine Only)",
        "Mix of Solid Tumors (MOST)"
      ],
      "interventions": [
        {
          "name": "blood and tissue samples",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "blood and tissue samples",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST",
        "OTHER"
      ],
      "sponsor": "Paradigm Health",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1350,
      "start_date": "2025-01-08",
      "completion_date": "2032-04",
      "has_results": false,
      "last_update_posted_date": "2025-08-14",
      "last_synced_at": "2026-09-23T22:08:36.237Z",
      "location_count": 2,
      "location_summary": "San Diego, California • Maumee, Ohio",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Maumee",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06605404"
    },
    {
      "nct_id": "NCT02666378",
      "title": "Imaging Markers of Subclinical Cardiotoxicity in Breast Cancer",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Cardiac Magnetic Resonance Imaging (CMR)",
          "type": "OTHER"
        },
        {
          "name": "Echocardiogram (ECHO)",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Beth Israel Deaconess Medical 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": 50,
      "start_date": "2018-09-10",
      "completion_date": "2024-07-10",
      "has_results": false,
      "last_update_posted_date": "2024-10-01",
      "last_synced_at": "2026-09-23T22:08:36.237Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02666378"
    },
    {
      "nct_id": "NCT04537871",
      "title": "Cardiovascular Reserve Evaluation in Survivors of Transplant, CREST Study",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Acute Lymphoblastic Leukemia",
        "Acute Myeloid Leukemia",
        "Hematopoietic and Lymphoid Cell Neoplasm",
        "Hodgkin Lymphoma",
        "Myelodysplastic Syndrome",
        "Non-Hodgkin Lymphoma",
        "Plasma Cell Myeloma"
      ],
      "interventions": [
        {
          "name": "Bioelectric Impedance Analysis",
          "type": "PROCEDURE"
        },
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Cardiopulmonary Exercise Testing",
          "type": "PROCEDURE"
        },
        {
          "name": "Echocardiography",
          "type": "PROCEDURE"
        },
        {
          "name": "Physical Performance Testing",
          "type": "PROCEDURE"
        },
        {
          "name": "Pulmonary Function Test",
          "type": "PROCEDURE"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        },
        {
          "name": "Ultrasound",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "City of Hope Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 350,
      "start_date": "2020-11-18",
      "completion_date": "2027-05-25",
      "has_results": false,
      "last_update_posted_date": "2026-08-14",
      "last_synced_at": "2026-09-23T22:08:36.237Z",
      "location_count": 1,
      "location_summary": "Duarte, California",
      "locations": [
        {
          "city": "Duarte",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04537871"
    },
    {
      "nct_id": "NCT05099952",
      "title": "Sleep and Circadian Rhythm Study in Head and Neck Cancer Patients",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Head and Neck Squamous Cell Carcinoma"
      ],
      "interventions": [
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Counseling",
          "type": "OTHER"
        },
        {
          "name": "Educational Intervention",
          "type": "OTHER"
        },
        {
          "name": "Electronic Health Record Review",
          "type": "OTHER"
        },
        {
          "name": "Medical Device Usage and Evaluation",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "Roswell Park Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2021-12-15",
      "completion_date": "2026-12-15",
      "has_results": false,
      "last_update_posted_date": "2022-01-12",
      "last_synced_at": "2026-09-23T22:08:36.237Z",
      "location_count": 1,
      "location_summary": "Buffalo, New York",
      "locations": [
        {
          "city": "Buffalo",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05099952"
    },
    {
      "nct_id": "NCT03712605",
      "title": "Testing Pembrolizumab Versus Observation in Patients With Merkel Cell Carcinoma After Surgery, STAMP Trial",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Pathologic Stage I Cutaneous Merkel Cell Carcinoma AJCC v8",
        "Pathologic Stage II Cutaneous Merkel Cell Carcinoma AJCC v8",
        "Pathologic Stage III Cutaneous Merkel Cell Carcinoma AJCC v8"
      ],
      "interventions": [
        {
          "name": "Best Practice",
          "type": "OTHER"
        },
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Computed Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Magnetic Resonance Imaging",
          "type": "PROCEDURE"
        },
        {
          "name": "Pembrolizumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Positron Emission Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Radiation Therapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "OTHER",
        "PROCEDURE",
        "BIOLOGICAL",
        "RADIATION"
      ],
      "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": 280,
      "start_date": "2018-11-15",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-08-04",
      "last_synced_at": "2026-09-23T22:08:36.237Z",
      "location_count": 552,
      "location_summary": "Birmingham, Alabama • Anchorage, Alaska • Fairbanks, Alaska + 357 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03712605"
    },
    {
      "nct_id": "NCT06482073",
      "title": "Molecular Analysis of Suspected or High-Risk Lung Cancer to Drive Individualized Care",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Lung Carcinoma",
        "Metastatic Malignant Neoplasm in the Lung"
      ],
      "interventions": [
        {
          "name": "Non-Interventional Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 250,
      "start_date": "2024-06-24",
      "completion_date": "2027-07-01",
      "has_results": false,
      "last_update_posted_date": "2026-09-08",
      "last_synced_at": "2026-09-23T22:08:36.237Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06482073"
    },
    {
      "nct_id": "NCT00573651",
      "title": "Safety and Efficacy of Gardasil in Females With Juvenile Idiopathic Arthritis (JIA)/Seronegative Arthritis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Arthritis"
      ],
      "interventions": [
        {
          "name": "Blood Draws for Serum Titers",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University Hospitals Cleveland Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "9 Years",
        "maximum_age": "26 Years",
        "sex": "FEMALE",
        "summary": "9 Years to 26 Years · Female only"
      },
      "enrollment_count": 43,
      "start_date": "2007-11",
      "completion_date": "2014-10-20",
      "has_results": true,
      "last_update_posted_date": "2024-07-05",
      "last_synced_at": "2026-09-23T22:08:36.237Z",
      "location_count": 4,
      "location_summary": "Chicago, Illinois • Cleveland, Ohio",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00573651"
    },
    {
      "nct_id": "NCT03760237",
      "title": "Cardiovascular Function in Acute Leukemia",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Leukemia, Myeloid, Acute",
        "Leukemia, Lymphoid, Acute",
        "Cardiotoxicity"
      ],
      "interventions": [
        {
          "name": "observation only",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Abramson Cancer Center at Penn Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 84,
      "start_date": "2018-12-10",
      "completion_date": "2024-05-06",
      "has_results": false,
      "last_update_posted_date": "2024-10-10",
      "last_synced_at": "2026-09-23T22:08:36.237Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03760237"
    },
    {
      "nct_id": "NCT05081024",
      "title": "Establishing a ctDNA Biomarker to Improve Organ Preserving Strategies in Patients With Rectal Cancer",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Rectal Adenocarcinoma",
        "Stage II Rectal Cancer AJCC v8",
        "Stage IIA Rectal Cancer AJCC v8",
        "Stage IIB Rectal Cancer AJCC v8",
        "Stage IIC Rectal Cancer AJCC v8",
        "Stage III Rectal Cancer AJCC v8",
        "Stage IIIA Rectal Cancer AJCC v8",
        "Stage IIIB Rectal Cancer AJCC v8",
        "Stage IIIC Rectal Cancer AJCC v8"
      ],
      "interventions": [
        {
          "name": "Biopsy",
          "type": "PROCEDURE"
        },
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Electronic Health Record Review",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "OHSU Knight Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2021-09-03",
      "completion_date": "2027-09-03",
      "has_results": false,
      "last_update_posted_date": "2026-09-16",
      "last_synced_at": "2026-09-23T22:08:36.237Z",
      "location_count": 2,
      "location_summary": "Portland, Oregon • Seattle, Washington",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05081024"
    },
    {
      "nct_id": "NCT06217874",
      "title": "Collection of Specimens and Clinical Data for Patients With Recurrent or Metastatic Breast Cancer or Male Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Breast Carcinoma",
        "Metastatic Breast Carcinoma",
        "Recurrent Breast Carcinoma"
      ],
      "interventions": [
        {
          "name": "Non-Interventional Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2000,
      "start_date": "2014-06-05",
      "completion_date": "2034-06-30",
      "has_results": false,
      "last_update_posted_date": "2026-02-25",
      "last_synced_at": "2026-09-23T22:08:36.237Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06217874"
    }
  ]
}