Fig. 3From: Why does a point of care guided transfusion algorithm not improve blood loss and transfusion practice in patients undergoing high-risk cardiac surgery? A prospective randomized controlled pilot studyCumulative chest tube drainage volume of the first 24 h postoperatively. Multivariate nonparametric analysis of longitudinal data in a two-factorial design (1st factor: groups, 2nd factor: repetitions in time) revealed no differences between conventional and point-of-care group (p = 0.548)Back to article page