American Society of Anesthesiologists

Fig. 1.

Measures of the Ca2+ transient indicated by the fluorescence ratio (R340/380). Typical trace after K+ stimulation (A) shows baseline ratio (RBL), transient amplitude above baseline (RΔmax), transient duration to 80% recovery (T80), transient area (shaded), and the offset of the posttransient baseline above the original baseline (RBLΔ). Transients after field stimulation (B) typically lack a plateau. Because the measure of T80 is then highly sensitive to transient amplitude, this measure was not separately determined.

Measures of the Ca²⁺ transient indicated by the fluorescence ratio (R_340/380). Typical trace after K⁺ stimulation (A) shows baseline ratio (R_BL), transient amplitude above baseline (RΔ_max), transient duration to 80% recovery (T₈₀), transient area (shaded), and the offset of the posttransient baseline above the original baseline (R_BLΔ). Transients after field stimulation (B) typically lack a plateau. Because the measure of T₈₀ is then highly sensitive to transient amplitude, this measure was not separately determined.

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