Study of Feasibility for Surgical Patients Undergoing Heart Surgery With the Mammary Arteries: Reviewing Infection, Occlusion Rates and Pain Assessments.
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Skeletonized vs non-skeletonized harvesting of the left internal mammary artery.
- Who it may be relevant to
- Registry conditions: Graft Patency. Basic parameters: from 18 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Canada
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
Unsure about the terms? Read our patient guide →
Official title
Pilot Study for COMFORT Trial Comparative Outcomes of Mammary Artery Harvesting: Infection, Occlusion Rates and Thoracic Pain Assessment
Overview
The Pilot study for the COMFORT Trial is a single centre trial to determine the feasibility of the full COMFORT Trial. The main COMFORT Trial will be a multi-centre trial to investigate the coronary artery bypass grafting outcomes when harvesting the Left Internal Mammary Artery (LIMA) using a skeletonized approach (artery is isolated without the surrounding veins, fascia and nerves) compared to harvesting the LIMA using a non-skeletonized approach (artery is isolated with the surrounding veins, fascia and nerves). Harvesting the LIMA with the non-skeletonized approach is the standard technique. Participants will complete a Coronary Artery Tomography scan at 1 year to determine if the LIMA graft remains open. Follow up of the participants will continue until 2 years post surgery.
Detailed description
Prior to expansion of the COMFORT Trial to multiple centres, a pilot phase will be conducted at UOHI to evaluate the feasibility of implementing the study protocol within the local clinical and research environment.
Conducting an initial pilot phase allows the study team to assess the practical aspects of trial implementation, including patient screening and recruitment, informed consent procedures, randomization workflow, intraoperative documentation of the harvesting technique, and completion of study data collection.
The pilot phase will also allow evaluation of study logistics related to follow-up procedures, including postoperative data collection and coordination of protocol-mandated computed tomography angiography (CTA). This process will help identify and address any operational challenges prior to broader trial implementation across participating centres.
Participants enrolled during the pilot phase will undergo the same randomized study procedures described in the main COMFORT Trial protocol. Data collected during this phase may contribute to the overall COMFORT Trial dataset, subject to confirmation that the pilot procedures align with the finalized trial protocol and statistical analysis plan.
Interventions
- Procedure Skeletonized vs non-skeletonized harvesting of the left internal mammary artery
This intervention is the surgical technique used to harvest the artery that will be used to perform the bypass surgery.
Primary outcome measures
- Feasibility of Implementation [Time frame: 2 years]
Secondary outcome measures (4)
- Recruitment Rate [Time frame: Activation of study to 6 months.]
- Protocol Adherence [Time frame: activation to 2 years per participant.]
- Completeness of Study Data Collection [Time frame: activation to 2 years per participant.]
- Completion of CTA at 1 year. [Time frame: enrollment to 1 year.]
Eligibility criteria
Inclusion criteria
- Age 18 years or older
- Undergoing isolated CABG surgery with median sternotomy and a planned LIMA-LAD graft.
- Provision of written informed consent.
Exclusion criteria
- Non-sternotomy surgical approach (e.g., minimally invasive, thoracotomy)
- Emergency surgery (defined as surgery required within 24 hours or presentation
- History of prior ternotomy
- Currently receiving systemic antibiotics or with an active bacterial infection at the time of surgery
- History of chronic sternal pain prior to the index surgery.
- Known left subclavian artery stenosis (>50%)
- Previous radiation therapy to the chest
- Known allergy or contraindication to iodinated contrast media that cannot be managed with premedication.
- Estimated glomerular filtration rate (eGFR) <30 ml/min/1.73m2 at baseline (relative contraindications to CTA contrast). The eGFR will be determined by each participating institution according to their standard practice.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Allocation
- Randomized
- Model
- Parallel assignment
- Masking
- Quadruple blind
- Primary purpose
- Other
Study locations
Canada · 1 center
- University of Ottawa Heart Institute — Ottawa
Identifiers
NCT: NCT07599553 · 20260183-01H