Automated Carbon Dioxide Angiography in Fenestrated/Branched Endovascular Abdominal Aortic Aneurysm Repair

October 24, 2023 updated by: Uppsala University

Automated Carbon Dioxide Angiography in Comparison to Iodinated Contrast Medium Angiography During Fenestrated/Branched Endovascular Abdominal Aortic Aneurysm Repair (F/B-EVAR)

Carbon Dioxide (CO2)-based angiography is a digital subtraction angiography (DSA), where CO2 is used as an intra-arterial contrast agent.

Now, with the availability of an automated CO2 injector system (Angiodroid Srl, Italy) and the improvement in image acquisition protocols, CO2 angiography is increasingly used for vascular imaging and endovascular procedures.

Fenestrated and branched endovascular aortic repair (F/B-EVAR) for thoracoabdominal aortic aneurysms (TAAAs) is nowadays considered the treatment of first choice, due to its reduced procedure-related morbidity and mortality, when compared to open repair.

A peculiarity of these procedures is the need of high volumes of contrast media, which are not needed in case of open repair. This increases the related risk of impaired kidney function at the short- and long-term.

The present study will specifically examine the safety of the use of CO2 as intra-arterial contrast agent using the Angiodroid automated CO2-injection system during F/B-EVAR procedures. Furthermore, the current study will focus on image quality during the different steps of the procedure with the aim of standardize injection parameters (volume and pressure) for the detection of the ostium of the visceral vessels as well as of the iliac arteries, all defined as target vessels.

Study Overview

Status

Not yet recruiting

Intervention / Treatment

Detailed Description

Carbon Dioxide (CO2)-based angiography is a digital subtraction angiography (DSA), where CO2 is used as an intra-arterial contrast agent. This practice started in 1970s and it is commonly used for patients who have an impaired renal function, allergy to iodinated contrast media (ICM) or that could have a contrast-induced nephropathy (CIN) risk.

Carbon dioxide is an effective and low-risk alternative to ICM, which is nowadays used in endovascular procedures, thanks to its unique properties, such as no risk for nephrotoxicity or allergic reaction. For many years, the two most important restrictions for this technique consisted of: 1) the absence of a delivery system that could minimize the risk of air contamination during the CO2 angiography and allow controlled injection (in terms of pressure and volume of injection) of the CO2 and 2) the absence of a customized imaging protocol for a better visualization of CO2 during DSA acquisition.

Now, with the availability of an automated CO2 injector system (Angiodroid Srl, Italy) and the improvement in image acquisition protocols, CO2 angiography is increasingly used for vascular imaging and endovascular procedures.

Fenestrated and branched endovascular aortic repair (F/B-EVAR) for thoracoabdominal aortic aneurysms (TAAAs) is nowadays considered the treatment of first choice, due to its reduced procedure-related morbidity and mortality, when compared to open repair.

A peculiarity of these procedures is the need of high volumes of contrast media, which are not needed in case of open repair. This increases the related risk of impaired kidney function at the short- and long-term.

The literature on CO2 angiography still lacks on studies regarding the systematic use of the technique in F/B-EVAR procedures.

The present study will specifically examine the safety of the use of CO2 as intra-arterial contrast agent using the Angiodroid automated CO2-injection system during F/B-EVAR procedures. Furthermore, the current study will focus on image quality during the different steps of the procedure with the aim of standardize injection parameters (volume and pressure) for the detection of the ostium of the visceral vessels as well as of the iliac arteries, all defined as target vessels.

The main study hypothesis is that the automated standardized injection of CO2 could provide the same angiographic information and image quality as ICM, which is nowadays used as standard contrast agent in endovascular procedures.

Study Type

Observational

Enrollment (Estimated)

30

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Patient with a formal indication to an endovascular treatment of complex throacoabdominal aneurysms.

Description

Inclusion Criteria:

  • Patients with indication for treatment of complex TAAA according to accepted international guidelines
  • Provided informed consent

Exclusion Criteria:

  • Severe COPD (Chronic Obstructive Pulmonary Disease), GOLD Stage 3 and 4
  • Known atrium- or ventricular septal defect with right-left-shunt
  • Current participation in other interventional studies

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Technical success
Time Frame: at the time the intervention
Technical success in terms of detecting the ostium of the visceral vessels as well as of the hypogastric arteries (defined as 100% accuracy when compared to the iodinated contrast agent angiography)
at the time the intervention
CO2 sensitivity and specificity compared to iodinated contrast agent angiography
Time Frame: at the time the intervention
CO2 sensitivity and specificity compared to iodinated contrast agent angiography in detecting dissections, stenosis, occlusions or bleeding of the target vessel. The comparison will be blinded and retrospective.
at the time the intervention

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Image quality
Time Frame: at the time the intervention
Image quality with regard to the CO2 angiography defined as poor, moderate and good. The analysis of the images will be retrospective.
at the time the intervention

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Safety endpoints
Time Frame: within the first postoperative 24 hours
Any adverse event within the first postoperative 24 hours
within the first postoperative 24 hours

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Principal Investigator: Giuseppe Asciutto, MD, PhD, Uppsala University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

November 1, 2023

Primary Completion (Estimated)

November 1, 2024

Study Completion (Estimated)

November 1, 2025

Study Registration Dates

First Submitted

October 18, 2023

First Submitted That Met QC Criteria

October 24, 2023

First Posted (Actual)

October 27, 2023

Study Record Updates

Last Update Posted (Actual)

October 27, 2023

Last Update Submitted That Met QC Criteria

October 24, 2023

Last Verified

October 1, 2023

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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