Radial artery cannulation is a routine procedure for invasive hemodynamic monitoring for patients undergoing cardiovascular surgery patients.
Although ultrasound (USG) guidance is known to improve success rates, there is limited data comparing the efficacy of the 'Direct' versus 'Seldinger' techniques specifically in patients with anticipated difficult radial access.
This study aims to compare the effectiveness of USG-guided Direct cannulation and USG-guided Seldinger techniques in adult patients with anticipated difficult radial arterial cannulation.
Patients aged 18 years or older
American Society of Anesthesiologists (ASA) physical status I-IV
Patients scheduled for cardiovascular surgery requiring invasive arterial monitoring
Patients undergoing emergency surgery
Coagulation disorders or known coagulopathy
Presence of an arteriovenous fistula
Patients in shock or hemodynamically instable