{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Doppler&page=2",
    "query": {
      "intervention": "Doppler",
      "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=Doppler&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-11T07:58:54.600Z",
  "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": "NCT01913457",
      "title": "Measurements and Characterization of Doppler Signals From the Right Chest in Pediatric and Adult Patients",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pulmonary Hypertension"
      ],
      "interventions": [
        {
          "name": "Ultrasound Doppler",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "Echosense Ltd.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 230,
      "start_date": "2013-07",
      "completion_date": "2021-07-01",
      "has_results": false,
      "last_update_posted_date": "2022-03-23",
      "last_synced_at": "2026-09-11T07:58:54.600Z",
      "location_count": 2,
      "location_summary": "Palo Alto, California",
      "locations": [
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01913457"
    },
    {
      "nct_id": "NCT00225381",
      "title": "Gas Kinetics and Metabolism in Anesthesia During Non Steady State",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Anesthetized Healthy Patients (ASA 1 or 2) in the Supine Position, Excluding Head, Neck and Head Surgeries",
        "Anesthetized Patient With Severe Systemic Disease (ASA 3 or 4)"
      ],
      "interventions": [
        {
          "name": "connection of measuring device to anesthesia circuit",
          "type": "DEVICE"
        },
        {
          "name": "drawing of blood sample through an arterial line, placed according to clinical criteria by primary anesthesia team",
          "type": "PROCEDURE"
        },
        {
          "name": "changing operating room bed position (head down and up position)",
          "type": "PROCEDURE"
        },
        {
          "name": "adding PEEP during anesthesia",
          "type": "PROCEDURE"
        },
        {
          "name": "placement of esophageal Doppler for cardiac output measurements",
          "type": "PROCEDURE"
        },
        {
          "name": "Humidity sensor",
          "type": "DEVICE"
        },
        {
          "name": "A mixing chamber (bymixer)",
          "type": "DEVICE"
        },
        {
          "name": "Pneumotachometer cuvette",
          "type": "DEVICE"
        },
        {
          "name": "Mass spectrometer sampling port",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "PROCEDURE"
      ],
      "sponsor": "University of California, Irvine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2005-08",
      "completion_date": "2012-01-13",
      "has_results": false,
      "last_update_posted_date": "2021-03-23",
      "last_synced_at": "2026-09-11T07:58:54.600Z",
      "location_count": 1,
      "location_summary": "Orange, California",
      "locations": [
        {
          "city": "Orange",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00225381"
    },
    {
      "nct_id": "NCT03245086",
      "title": "Multicenter Prospective Trial on Hemorrhoids",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hemorrhoids"
      ],
      "interventions": [
        {
          "name": "Transanal hemorrhoid dearterialization",
          "type": "DEVICE"
        },
        {
          "name": "Ferguson hemorrhoidectomy",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "PROCEDURE"
      ],
      "sponsor": "Stony Brook University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 492,
      "start_date": "2016-08-17",
      "completion_date": "2019-08",
      "has_results": false,
      "last_update_posted_date": "2017-08-10",
      "last_synced_at": "2026-09-11T07:58:54.600Z",
      "location_count": 1,
      "location_summary": "Stony Brook, New York",
      "locations": [
        {
          "city": "Stony Brook",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03245086"
    },
    {
      "nct_id": "NCT01835028",
      "title": "Multicenter Prospective Study of Low-Flow Low-Gradient Aortic Stenosis (TOPAS Study)",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Aortic Valve Stenosis"
      ],
      "interventions": [
        {
          "name": "Echocardiography",
          "type": "OTHER"
        },
        {
          "name": "Computed tomography",
          "type": "OTHER"
        },
        {
          "name": "Magnetic resonance imaging",
          "type": "OTHER"
        },
        {
          "name": "Blood biomarkers",
          "type": "OTHER"
        },
        {
          "name": "Stress echocardiography",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Laval University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "21 Years to 90 Years"
      },
      "enrollment_count": 320,
      "start_date": "2002-06",
      "completion_date": "2024-01",
      "has_results": false,
      "last_update_posted_date": "2021-09-21",
      "last_synced_at": "2026-09-11T07:58:54.600Z",
      "location_count": 2,
      "location_summary": "Rochester, Minnesota • Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01835028"
    },
    {
      "nct_id": "NCT06486181",
      "title": "Second Line Endovascular Treatment in Acute DVT",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Deep Venous Thrombosis"
      ],
      "interventions": [
        {
          "name": "Thrombolysis/Thrombectomy",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Rush University Medical Center",
      "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": 100,
      "start_date": "2026-04-01",
      "completion_date": "2029-04-30",
      "has_results": false,
      "last_update_posted_date": "2026-01-28",
      "last_synced_at": "2026-09-11T07:58:54.600Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06486181"
    },
    {
      "nct_id": "NCT04692818",
      "title": "3D Ultrasound Breast Imaging",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Breast Tumor"
      ],
      "interventions": [
        {
          "name": "GE Logiq E10 clinical ultrasound scanner",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Verasonics research scanner",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Mayo Clinic",
      "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": 125,
      "start_date": "2021-11-10",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-06-01",
      "last_synced_at": "2026-09-11T07:58:54.600Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04692818"
    },
    {
      "nct_id": "NCT03786822",
      "title": "Reduction of Radiation Dose and Contrast Use During Cryoballoon Pulmonary Vein Isolation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "Cryoballoon Pulmonary Vein Isolation - PVI",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "University of Texas Southwestern Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 1,
      "start_date": "2015-06-01",
      "completion_date": "2016-12-20",
      "has_results": false,
      "last_update_posted_date": "2018-12-26",
      "last_synced_at": "2026-09-11T07:58:54.600Z",
      "location_count": 1,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03786822"
    },
    {
      "nct_id": "NCT07253818",
      "title": "Passive Leg Raising in Term Pregnancy on Hemodynamic Monitoring - Validating With Transthoracic ECHO (LG-ECHO)",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Maternity",
        "Pregnancy",
        "Labor and Delivery",
        "Hemodynamic Changes"
      ],
      "interventions": [
        {
          "name": "ClearSight™ System",
          "type": "DEVICE"
        },
        {
          "name": "Transthoracic Echocardiography",
          "type": "DEVICE"
        },
        {
          "name": "Passive Leg Raising (PLR) Maneuver",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "PROCEDURE"
      ],
      "sponsor": "Ayse Zeynep Turan Civraz",
      "sponsor_class": "OTHER_GOV",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 45 Years · Female only"
      },
      "enrollment_count": 0,
      "start_date": "2026-01-01",
      "completion_date": "2026-07-30",
      "has_results": false,
      "last_update_posted_date": "2026-01-29",
      "last_synced_at": "2026-09-11T07:58:54.600Z",
      "location_count": 1,
      "location_summary": "Jacksonville, Florida",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07253818"
    },
    {
      "nct_id": "NCT03596333",
      "title": "Color Doppler Ultrasound to Locate Needle in Labor Epidural",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Labor Pain",
        "Obstetric Pain"
      ],
      "interventions": [
        {
          "name": "Retrospective chart review",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Augusta University",
      "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": 35,
      "start_date": "2018-05-28",
      "completion_date": "2018-06-30",
      "has_results": false,
      "last_update_posted_date": "2018-07-23",
      "last_synced_at": "2026-09-11T07:58:54.600Z",
      "location_count": 1,
      "location_summary": "Augusta, Georgia",
      "locations": [
        {
          "city": "Augusta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03596333"
    },
    {
      "nct_id": "NCT03296280",
      "title": "Evaluation of Implementation of a National Point-of-Care Ultrasound Training Program",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Other Acute Illnesses Presenting to the Hospital",
        "Heart Failure",
        "Pneumonia",
        "Deep Venous Thrombosis",
        "Cellulitis",
        "Abdominal Aortic Aneurysm",
        "Acute Cholecystitis",
        "Peritoneal Free Fluid",
        "Hydronephrosis",
        "Pleural Effusion",
        "Urinary Retention"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "VA Office of Research and Development",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 116,
      "start_date": "2016-10-03",
      "completion_date": "2020-09-30",
      "has_results": true,
      "last_update_posted_date": "2020-11-23",
      "last_synced_at": "2026-09-11T07:58:54.600Z",
      "location_count": 1,
      "location_summary": "San Antonio, Texas",
      "locations": [
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03296280"
    }
  ]
}