Figure 2. Clearance of mivacurium's trans-trans isomer (A) and cis-trans isomer (B) are plotted against (log) age. Triangles represent measured values. Open symbols are based on venous samples, and closed symbols are based on arterial samples. The line was obtained by analysis of linear regression (trans-trans: r2= 0.19, P = 0.01; cis-trans: r2= 0.19, P = 0.02).