Abstract
[Objective]In minimally invasive cardiac surgery (MICS), leg ischemia is one of the known complications due to the femoral arterial cannulation. We routinely monitor distal leg perfusion based on the regional oxygen saturation(rSO2) using the near-infrared spectroscopy (NIRS) for the prevention of lower limb ischemia. In this study, we examined the impact of the tip design of the femoral arterial cannula on distal leg perfusion.
[Methods]From April 2014 to September 2017, we performed 106 cases of right thoracotomy MICS with femoral arterial cannulation. We used a cannula with multiple side holes and no wire-reinforced tip in 52 patients (group C), and a cannula with few side holes and wire-reinforcement in 54 patients (group N). We adjusted for confounding variables using propensity score matching.
[Results]The rate of drops in rSO2 value greater than 25% was significantly lower in group N than in group C (15.6% vs 60.0%;p=0.003). No significant difference was observed in other factors.
[Conclusion]In addition to conventional prevention methods, using a wire-reinforced femoral arterial cannula may reduce the risk of lower limb ischemia in MICS.
