Fig. 5From: Target-controlled infusion of remifentanil with or without flurbiprofen axetil in sedation for extracorporeal shock wave lithotripsy of pancreatic stones: a prospective, open-label, randomized controlled trialSpO2 and RR at the lowest and highest levels in the two groups (n = 30 for both groups). RR, respiratory rate. *p < 0.01Back to article page