- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04783272
Photoacoustic Computed Tomography for Pre-Operative Reconstructive Flap Angiography
Photoacoustic Computed Tomography for Pre-Operative Reconstructive Flap Angiography - Pilot Study
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Photoacoustic Computed Tomography (PACT) is a novel, non-invasive imaging technique which can perform deep tissue imaging with high spatial resolution and optical contrast. The system utilizes short-pulsed lasers to generate photoacoustic waves in biological tissues. These are then detected by a 512-element full-ring transducer array, which allows for high spatial resolution, especially in deep tissues. In addition, PACT utilizes diffuse optical tomography, in which the light absorption of hemoglobin at visible or near-infrared wavelengths, provides excellent contrast for the imaging of human vasculature.
Prior studies of PACT imaging have evaluated this technique to image the human breast as an alternative modality for breast cancer screening as well as to image human extremities for the evaluation of vascular disease. The full-ring transducer array offers a significant advantage in spatial resolution, especially in deep tissues, over the standard linear arrays employed in the standard, widely-used handheld ultrasonic transducers. In addition, diffuse optical tomography allows for strong vascular contrast over a large field of view without the use of exogenous contrast agents.
Flap reconstructive surgery utilizes a patient's own soft tissues to recreate structures, fill large soft tissue defects, provide joint coverage, or perform other reconstructive operations. Examples of patients who would require flap reconstructive surgery include patients undergoing mastectomies and patients who have suffered from trauma with significant tissue loss. Tissue flaps have a defined blood supply which originate from the original site of the tissue. The flap can be compromised if the arterial supply or venous drainage is jeopardized during tissue transfer. Therefore, an accurate understanding of the blood supply of the tissue flap is crucial for successful flap reconstructive surgery.
Current pre-operative vascular imaging modalities for flap reconstructive surgery include handheld Doppler ultrasonography, magnetic resonance angiography (MRA), and the gold standard computed tomography angiography (CTA). Doppler ultrasonography is technician-dependent, inaccurate, and lacks optical contrast. MRA is expensive, requires a lengthy imaging time, and requires the administration of intravenous contrast. CTA is also expensive, also requires the administration of intravenous contrast, and requires the administration of ionizing radiation. PACT does not require the administration of intravenous contrast or ionizing radiation, and provides excellent spatial resolution and optical contrast. Therefore, PACT would be an optimal pre-operative vascular imaging modality for flap reconstructive surgery.
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Monica Jain, MD
- Phone Number: 310-423-8350
- Email: Monica.Jain@cshs.org
Study Locations
-
-
California
-
Los Angeles, California, United States, 90048
- Recruiting
- Cedars Sinai Medical Center
-
Contact:
- Monica Jain, MD
- Phone Number: 310-423-8350
- Email: Monica.Jain@cshs.org
-
Principal Investigator:
- Edward Ray, MD
-
Sub-Investigator:
- Monica Jain, MD
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Patients above the age of 18 who are planned to undergo non-urgent flap reconstructive surgery, specifically either an abdominally-based flap or an ALT flap, will be study candidates.
Exclusion Criteria:
- Patients who require urgent or emergent flap reconstructive surgery, have undergone prior abdominally-based or ALT flap reconstructive surgery, who cannot receive ionizing radiation (required for CTA), who cannot receive iodinated intravenous contrast (required for CTA), and whose weight exceeds 300lbs (weight limit of PACT machine) will be excluded from the study.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Device Feasibility
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Treatment
Photoacoustic Computed Tomography (PACT) Imaging
|
PACT will be completed prior surgery.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
PACT Patient Comfort Questionnaire
Time Frame: This questionnaire will be completed by patient at the time of the PACT Imaging visit. Imaging visit will occur after the initial visit and before surgery up to 4 months.
|
The data is ordinal and discrete (Likert scale).
The scale is 1 to 5 where 1 is the worst and 5 is the best.
|
This questionnaire will be completed by patient at the time of the PACT Imaging visit. Imaging visit will occur after the initial visit and before surgery up to 4 months.
|
Vascular Imaging Modality for Flap Reconstructive Surgery Questionnaire
Time Frame: This questionnaire will be completed by Dr. Edward Ray immediately following surgery.
|
The data is ordinal and discrete (Likert scale).
The scale is 1 to 5 where 1 is the worst and 5 is the best.
|
This questionnaire will be completed by Dr. Edward Ray immediately following surgery.
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Edward Ray, MD, Cedars-Sinai Medical Center
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- STUDY00000648
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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