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NCT00453531 · ClinicalTrials.gov registry record · Phase 1
Model System for Transient Forearm Blood Vessel Dysfunction
A Phase 1 study, sponsored by National Heart, Lung, and Blood Institute (NHLBI).
- Completed
- Registry status
- Phase 1
- Development phase
- 6
- Enrollment target
NCT00453531: Completed Phase 1 study, sponsored by National Heart, Lung, and Blood Institute (NHLBI).
NCT00453531 is a Phase 1 study that has completed, run by National Heart, Lung, and Blood Institute (NHLBI). The registered enrollment target is 6 participants, below the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (90% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00453531, a Phase 1 study, has completed, sponsored by National Heart, Lung, and Blood Institute (NHLBI).
- COMPLETED
- Registry status
- Phase 1
- Development phase
- 6 participants
- Enrollment target
Study Summary
This study will develop a model system that can be used to test medications for improving the ability of blood vessels to resist damage from diseases such as heart attack and stroke. The endothelium (inner layer of blood vessels) has built-in defense mechanisms to prevent blockage of blood flow, including the ability to stretch the vessel when it senses that blood flow is threatened. People with heart attack risk factors, such as high cholesterol, smoking and diabetes lose this ability. This study will develop a model that can measure the response to a lack of blood flow in the arm and be used to test new medicines to improve blood vessel health. Healthy males between 18 and 45 years of age who have no history of high blood pressure, high cholesterol, or diabetes and who have not smoked for at least 3 months before entering the study may be eligible to enroll. Participants lie in an adjustable reclining bed. Small catheters (tubes) are placed in the artery and vein of the forearm of the non-dominant arm at the inside of the elbow. Blood samples are collected from the tubes. Then, pressure cuffs are placed on both wrists and upper arms. A strain gauge (rubber band-type device) is placed around the forearms. The pressure cuffs are inflated and blood flows into the forearm, stretching the strain gauge at a rate proportional to the blood flow. Then, small doses of acetylcholine (a medicine that causes blood vessels to expand) are injected into the artery tube. After 20 minutes, blood flow to the non-dominant arm is blocked by inflating the pressure cuff. The subject squeezes a rubber ball about every 2 seconds for 90 seconds. The cuff is deflated after 15 minutes and blood samples are withdrawn from the tube in the vein. After 15 minutes, the procedure is repeated one more time.
Interventions
- DRUG Acetylcholine
- PROCEDURE Limb Ischemia
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 6 participants |
| Start Date | 2007-03-26 |
| Est. Completion | 2009-02-11 |
| Phase | Phase 1 |
What the finished NCT00453531 record still lists
NCT00453531 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 6 participants, a relatively small participant target, below the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (90% lower).
The record links to 0 conditions, and to 2 interventions - of which Acetylcholine is the first listed.
NCT00453531 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00453531 about?
NCT00453531 is a clinical study titled "Model System for Transient Forearm Blood Vessel Dysfunction". This study will develop a model system that can be used to test medications for improving the ability of blood vessels to resist damage from diseases such as heart attack and stroke. The endothelium (inner layer of blood vessels) has built-in defense mechanisms to prevent blockage of blood flow, inc...
What is the current status of trial NCT00453531?
This trial is currently completed. It is a Phase 1 study. The enrollment target is 6 participants. The study started on 2007-03-26. Estimated completion is 2009-02-11.
What interventions are being tested in trial NCT00453531?
The interventions under investigation include: Acetylcholine (DRUG), Limb Ischemia (PROCEDURE).
Who is sponsoring clinical trial NCT00453531?
This trial is sponsored by National Heart, Lung, and Blood Institute (NHLBI), which has 501 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT00453531's enrollment target sits among peer trials
6 1974th of 2000 higher than 12 of 2,000 other Phase 1 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 1 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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