Comparison of Intravascular Ultrasound With Venography in the Diagnosis &

See also
	Status	Clinical Trial	Phase
	Recruiting	`NCT04694248` - Anticoagulant Plus Antiplatelet Therapy Following Iliac Vein Stenting	N/A
	Completed	`NCT02942394` - Treatment of the Postthrombotic Syndrome With the Oblique Stent - TOPOS Study

See also

Status

Clinical Trial

Phase

Recruiting

NCT04694248 - Anticoagulant Plus Antiplatelet Therapy Following Iliac Vein Stenting

N/A

Completed

NCT02942394 - Treatment of the Postthrombotic Syndrome With the Oblique Stent - TOPOS Study

Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.

Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.

Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.

Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

NCT number	NCT03309969
Study type	Observational
Source	Shanghai Zhongshan Hospital
Contact	Zhenyu Shi, Doctor
Phone	+86 18616880807
Email	maxshizhenyu@163.com
Status	Recruiting
Phase	N/A
Start date	October 30, 2017
Completion date	March 1, 2019

Comparison of Intravascular Ultrasound With Venography in the Diagnosis and Treatment of Iliac Vein Compression Syndrome

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms