Surgical procedure type and interventions
Plasma lidocaine levels did not statistically differ between diagnostic
and therapeutic surgical groups at any measured time point. All p-values
were calculated as >0.05 utilising Mann-Whitney U-tests.
Peak lidocaine plasma levels were also analysed by surgical procedure
group, diagnostic or therapeutic, and the use of adrenaline,
endotracheal (ET) suction, both or neither. Due to the very small
numbers in some subgroups, comparison tests are not robust. However, the
plot suggests that there is no difference in the distribution of peak
lidocaine plasma between these groups.
This suggests surgical suction and application of vasoconstrictors have
no effect on peak plasma lidocaine levels.