Smartphone Assessment Prior Radial Artery Harvesting for CABG (iRADIAL-CABG)
Coronary Artery Disease
About this trial
This is an interventional screening trial for Coronary Artery Disease focused on measuring Smartphone, Coronary artery bypass grafting, Modified Allen's Test
Eligibility Criteria
Inclusion Criteria:
- Age greater than or equal to 18 years old
- Scheduled to undergo coronary artery bypass graft for which the surgeon is considering the use of a radial artery conduit
- Able and willing to provide written informed consent
Exclusion Criteria:
- Hemodynamic instability
- Need for emergent cardiac surgery
- Known previous removal of the radial or ulnar arteries
Sites / Locations
- University of Ottawa Heart Institute
Arms of the Study
Arm 1
Arm 2
Active Comparator
Active Comparator
Modified Allen's Test
Smartphone assessment
The Modified Allen's Test (MAT) will be performed in a well-lit room on the participant's hand. This technique will involve compression of both the radial and ulnar arteries by the investigator to assess patency of the contralateral artery. The participant will then be asked to clench and open their hand several times. The participant will then be asked to maintain their hand in an open position. The investigator will then release the compression over the ulnar artery and observe for palmar blush. The length of time to achieve maximal palmar blush will be recorded. This technique will then be repeated by maintaining compression over the ulnar artery and releasing of the compression over the radial artery.
The smartphone app (Heart Rate, Azumio software) will be used to assess radial and ulnar artery patency. Briefly, the iPhone camera will be placed over the participant's index finger and patency assessed before and immediately following isolated contralateral artery compression for a maximum of two minutes.