Table 4. Mean slope of lactate concentration over time for each of the portable and laboratory analysers. Analyser Brand Lactate concentration band (mM) All bands 0-1.9 2.0-4.9 5.0-9.9 10.0-14.9 15+ Mean slope (mM/min) Edge A -.010 -.009 -.027 -.100 -.077 -.045 Edge B -.009 -.032 -.033 -.152 -.068 -.054 i-STAT A .006 .018 .031 .022 .050 .026 i-STAT B .008 .073 .025 -.002 .059 .036 Lactate Pro A .008 .000 .033 -.067 -.050 -.012 Lactate Pro B .002 .000 -.008 -.021 .004 -.004 Lactate Pro2 A -.003 .006 .002 -.011 -.054 -.015 Lactate Pro2 B .007 .009 .008 -.038 -.036 -.010 Radiometer ABL90 .005 .017 -.019 -.026 -.038 -.016 Radiometer 715 .005 -.005 -.007 -.002 Scout+ A -.019 -.011 -.048 -.083 -.091 -.056 Scout+ B -.016 .028 -.024 -.040 -.113 -.045 Xpress A .017 .018 -.007 -.025 -.006 -.001 Xpress B .015 .042 -.003 -.024 .110 .034 All analysers .000 .010 -.008 -.050 -.035 -.017