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Showing 1–24 of 80 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Plethysmography Clear all
Completed No phase listed Observational

Early Detection and Management of Bronchiolitis Obliterans Syndrome Following Pediatric Hematopoietic Stem Cell Transplantation

NCT03072849
View directory record Official record
Conditions
Bronchiolitis Obliterans Syndrome
Interventions
Pulmonary function testing, FAM Therapy
Procedure · Drug
Lead sponsor
Ann & Robert H Lurie Children's Hospital of Chicago
Other
Eligibility
6 Years to 18 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 18, 2024 · Synced Sep 3, 2026, 10:12 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Insulin on Endothelin-Dependent Vascular Tone in the Forearm Circulation

NCT00001624
View directory record Official record
Conditions
Hyperinsulinemia
Interventions
Insulin
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
Not listed
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1997 – 2000
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 3, 2026, 10:12 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Assessing the Effects of a Topically Applied Cream to Clitoral Blood Flow

NCT01085981
View directory record Official record
Conditions
Female Sexual Dysfunction
Interventions
arginine 20%, nicotinamide .01%, niacin.1%, in LipodermPG 50%, Topical study cream, GRAS cream
Drug
Lead sponsor
East Suburban Ob Gyn
Other
Eligibility
25 Years to 60 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Monroeville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 11, 2010 · Synced Sep 3, 2026, 10:12 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Brain Integrity in Survivors of Hodgkin Lymphoma Treated With Thoracic Radiation

NCT01820117
View directory record Official record
Conditions
Hodgkin Lymphoma
Interventions
Neurocognitive Evaluation, Quantitative Brain Imaging, Neurologic Evaluation, Health Questionnaire, Vascular Testing, Cardiopulmonary Exercise Testing, Echocardiography, Pulmonary Function Testing, Serum Biomarkers, Ophthalmology Examination
Other · Procedure
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
18 Years and older
Enrollment
416 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Feb 28, 2018 · Synced Sep 3, 2026, 10:12 PM EDT
Recruiting No phase listed Observational

Surveillance Trial of the Apple Watch in Reliable Burden Assessment in Unseen Recurrence of Surgically Treated AF

NCT07122947
View directory record Official record
Conditions
Atrial Fibrillation
Interventions
Apple Watch: AFib History, Zio Patch
Device
Lead sponsor
The Cleveland Clinic
Other
Eligibility
22 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
2
States / cities
St Louis, Missouri • Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 13, 2025 · Synced Sep 3, 2026, 10:12 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

The Early and Late Contribution of Fasting and Postprandial Triglycerides on Newborn Subcutaneous and Intrahepatic Fat in Pregnancy

NCT04394806
View directory record Official record
Conditions
Pregnancy
Interventions
Not listed
Lead sponsor
University of Colorado, Denver
Other
Eligibility
0 Years to 39 Years
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Sep 3, 2026, 10:12 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Visual and Auditory Neuromodulation of Pain Perception

NCT04281836
View directory record Official record
Conditions
Pain, Acute
Interventions
Interoceptive breathing awareness through use of audio and visual virtual technology aid, Interoceptive breathing awareness without use of audio or visual virtual reality
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 60 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 23, 2020 · Synced Sep 3, 2026, 10:12 PM EDT
Completed No phase listed Observational

Determinants of Early Cystic Fibrosis Lung Disease

NCT03579173
View directory record Official record
Conditions
Cystic Fibrosis in Children
Interventions
Infant PFT, Lung Clearance Index, Passive tidal breathing
Diagnostic Test
Lead sponsor
Indiana University
Other
Eligibility
1 Month to 5 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jun 21, 2022 · Synced Sep 3, 2026, 10:12 PM EDT
Not yet recruiting No phase listed Observational Accepts healthy volunteers

Finger Plethysmography to Predict Fluid Responsiveness in Healthy Pregnancy and Severe Preeclampsia

NCT07430254
View directory record Official record
Conditions
Pre-Eclampsia, Severe, Pregnancy
Interventions
Noninvasive finger plethysmographic cardiac output monitoring, Standard transthoracic echocardiographic assessment
Diagnostic Test
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older · Female only
Enrollment
88 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Feb 23, 2026 · Synced Sep 3, 2026, 10:12 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Role of Endothelial Function in SCI CVD Risk

NCT06443151
View directory record Official record
Conditions
Spinal Cord Injuries, Cardiovascular Diseases, Endothelial Dysfunction
Interventions
Brachial intra-arterial infusion of vasoactive and antioxidant drugs (acetylcholine, nitroprusside, ascorbic acid), venous occlusion plethysmography, Acetylcholine, Sodium Nitroprusside, Ascorbic acid, venous phlebotomy
Procedure · Drug
Lead sponsor
Craig Hospital
Other
Eligibility
18 Years to 89 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Englewood, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 19, 2024 · Synced Sep 3, 2026, 10:12 PM EDT
Terminated Not applicable Interventional Results available

Comparing TR Band to Statseal in Conjunction With TR Band II

NCT04046952
View directory record Official record
Conditions
Arterial Occlusion, Cardiovascular Diseases, Atherosclerosis, Hematoma, Anticoagulant-induced Bleeding, Coronary Artery Disease
Interventions
Statseal with TR Band, TR band only
Device
Lead sponsor
VA Long Beach Healthcare System
Federal
Eligibility
18 Years and older
Enrollment
443 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Long Beach, California
Source: ClinicalTrials.gov public record
Updated Nov 18, 2024 · Synced Sep 3, 2026, 10:12 PM EDT
Terminated Phase 1Phase 2 Interventional Accepts healthy volunteers

Effects of Nicotine-Free Hookah Smoking on Blood Flow to the Heart, Muscle and Skin

NCT02310373
View directory record Official record
Conditions
Nicotine-free Hookah Smoking
Interventions
Nicotine free hookah smoking
Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years to 39 Years
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 12, 2020 · Synced Sep 3, 2026, 10:12 PM EDT
Completed Not applicable Interventional

Ring-type Pulse Oximeter for Evaluation for Sleep Assessment Study

NCT06221124
View directory record Official record
Conditions
Sleep-Disordered Breathing, Sleep Architecture
Interventions
Belun Ring Pulse Oximeter
Device
Lead sponsor
Belun Technology Company Limited
Other
Eligibility
18 Years to 80 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Redwood City, California
Source: ClinicalTrials.gov public record
Updated Jan 23, 2024 · Synced Sep 3, 2026, 10:12 PM EDT
Completed Not applicable Interventional Results available

Tailored to You (TTY) Pilot Study

NCT05141175
View directory record Official record
Conditions
Hypertension
Interventions
Hypertension medication algorithm, Impedance Cardiography
Device
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 30, 2023 · Synced Sep 3, 2026, 10:12 PM EDT
Completed Phase 2 Interventional

Phase 2a Topical Sildenafil Proof-of-Concept Study in Men With Mild to Moderate ED

NCT02390960
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
Sildenafil Cream, Placebo Cream, Penile Plethysmography (RigiScan)
Drug · Device
Lead sponsor
Strategic Science & Technologies, LLC
Industry
Eligibility
18 Years to 70 Years · Male only
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
3
States / cities
San Diego, California • New Orleans, Louisiana • New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 11, 2017 · Synced Sep 3, 2026, 10:12 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Characterization of Brachial Arterial t-PA Release, Endothelial Function, Obesity and Inflammation

NCT00780481
View directory record Official record
Conditions
Obesity
Interventions
Bradykinin
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years and older
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2011
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 13, 2017 · Synced Sep 3, 2026, 10:12 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Thora-3DI™ for Evaluation of Severity of Chronic Obstructive Pulmonary Disease (COPD)

NCT03492359
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Thora-3Di, Body Plethysmography, Spirometry
Device
Lead sponsor
Landon Pediatric Foundation
Other
Eligibility
18 Years to 80 Years
Enrollment
65 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated May 6, 2019 · Synced Sep 3, 2026, 10:12 PM EDT
Recruiting No phase listed Observational

Non-invasive Venous Air Plethysmography Assessment of Venous Hemodynamics in Patients Suspected Deep Venous Obstruction Used in Conjunction With Intermittent Pneumatic Compression.

NCT06519435
View directory record Official record
Conditions
Deep Vein Thrombosis
Interventions
Mayo Dopplex ABIlity, Intermittent Pneumatic Compression (IPC)
Device
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 27, 2025 · Synced Sep 3, 2026, 10:12 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Role of Endothelin in the Regulation of Vascular Tone in Patients With Essential Hypertension

NCT00001527
View directory record Official record
Conditions
Hypertension
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
Not listed
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1995 – 2000
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 3, 2026, 10:12 PM EDT
Completed No phase listed Observational

Speckle Plethysmography Pulse Transit Time as a Marker of Blood Pressure Changes

NCT05554315
View directory record Official record
Conditions
Blood Pressure
Interventions
Not listed
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
18 Years to 99 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced Sep 3, 2026, 10:12 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

DreamKit Respiratory Effort Signal Validation

NCT04926077
View directory record Official record
Conditions
Sleep Apnea, Obstructive, Sleep Apnea, Central
Interventions
DreamKit
Device
Lead sponsor
Philips Clinical & Medical Affairs Global
Industry
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 29, 2022 · Synced Sep 3, 2026, 10:12 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Endothelial Dysfunction After SCI

NCT07227727
View directory record Official record
Conditions
Spinal Cord Injuries, Endothelial Dysfunction
Interventions
Intra-arterial Infusion of Vasoactive Agents, Intra-arterial Vitamin C Infusion, Blood Sampling
Procedure
Lead sponsor
Craig Hospital
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Englewood, Colorado
Source: ClinicalTrials.gov public record
Updated Nov 13, 2025 · Synced Sep 3, 2026, 10:12 PM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Endothelial Hyperpolarization in Humans

NCT00166166
View directory record Official record
Conditions
Hyperlipidemia
Interventions
Tetraethylammonium (TEA), L-NG-monomethyl Arginine (L-NMMA), Bradykinin, Sodium nitroprusside, Acetylcholine, Saline, Fluconazole
Drug
Lead sponsor
Emory University
Other
Eligibility
21 Years to 65 Years
Enrollment
174 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2013
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 14, 2018 · Synced Sep 3, 2026, 10:12 PM EDT
Completed No phase listed Observational

Trending of Respiratory Rate Using the Nellcor™ Bedside Respiratory Patient Monitoring System

NCT03593603
View directory record Official record
Conditions
Patients Prescribed Non-invasive Respiratory Monitoring
Interventions
Nellcor™ Bedside Respiratory Monitoring System
Device
Lead sponsor
Medtronic - MITG
Industry
Eligibility
18 Years and older
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
2
States / cities
Tulsa, Oklahoma • Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated May 22, 2019 · Synced Sep 3, 2026, 10:12 PM EDT