Ignite Creation Date:
2025-12-24 @ 2:39 PM
Ignite Modification Date:
2026-03-03 @ 2:07 PM
Study NCT ID:
NCT02735759
Status:
WITHDRAWN
Last Update Posted:
2024-09-03
First Post:
2016-04-01
Is NOT Gene Therapy:
True
Has Adverse Events:
False
Brief Title:
Detecting Circulating Emboli in Patients with Acute Venous Thromboembolism
Sponsor:
University of Arkansas
Organization:
Study Overview
Official Title:
Detecting Circulating Emboli in Patients with Acute Venous Thromboembolism Using in Vivo Photoacoustic Flow Cytometry (PAFC)
Status:
WITHDRAWN
Status Verified Date:
2018-07
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Required revisions were unable to be made to protocol.
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
PAFC
Brief Summary:
The purpose of this study is to further evaluate and adjust the photoacoustic flow cytometry device and its use in detecting circulating emboli.
Study Design: Cohort 1: Normal healthy volunteers will be enrolled to further adjust the device settings. Cohort 2: Use the Phatoacoustic flow cytometry (PAFC) to detect circulating emboli in vivo in patients with venous thromboembolism at diagnosis, during and after anticoagulation therapy.
Study Design: Cohort 1: Normal healthy volunteers will be enrolled to further adjust the device settings. Cohort 2: Use the Phatoacoustic flow cytometry (PAFC) to detect circulating emboli in vivo in patients with venous thromboembolism at diagnosis, during and after anticoagulation therapy.
Detailed Description:
Laser beam from the investigational device Phatoacoustic flow cytometry PAFC will be applied to skin and underlying blood vessels. The optical and ultrasound signal will be collected for analysis. On each tested vessel, we will estimate the vessels diameter (using optical or/and ultrasound imaging). The subject's skin pigmentation will be classified as light, medium, or dark. A photoacoustic (PA) contrast will be considered usable for detection of circulating emboli if the photoacoustic signal from the vessels is more than 1.3-fold higher than the photoacoustic signal from surrounding tissue. The device for subjects enrolled on cohort 2 will be completed on day 0 (immediately after venous thromboembolism diagnosis and prior to anticoagulation therapy), day 7 ± 3 days after initiation of anticoagulation therapy, one week ± 3 days after completion of planned anticoagulation therapy and one month ± 3 days after completion of planned anticoagulation therapy. Anticoagulation therapy is part of the patient's normal standard of care and is not part of this study however data from what therapy was received may be captured. D-dimer test will be performed on each time point as part of their normal standard of care however if the D-dimer test is not ordered as part of the standard of care it will be required for the study.. Patients will then be followed in hematology clinic to monitor the venous thromboembolism recurrence every 3 months for one year.
Study Oversight
Has Oversight DMC:
False
Is a FDA Regulated Drug?:
False
Is a FDA Regulated Device?:
True
Is an Unapproved Device?:
True
Is a PPSD?:
None
Is a US Export?:
False
Is an FDA AA801 Violation?: