Does the systemic rise in serum lactate levels correlate to free flap failure in head and neck reconstructive surgeries—series of cases

Ain-Shams Journal of Anesthesiology

Table 2 Distribution of lactates and pH in groups F and N

Parameters (mean ± SD)	Group	Baseline (mean ± SD)	2 h (mean ± SD)	4 h	6 h	8 h	10 h	12 h	14 h	16 h	18 h	20 h	22 h	24 h
Lactates	Gr F	2.71 ± 1.28	3.20 ± 2.12	2.75 ± 1.76	2.00 ± 1.13	2.00 ± 1.41	2.10 ± 1.56	2.35 ± 1.76	4.12 ± 3.42	3.80 ± 3.11	3.15 ± 2.33	2.35 ± 2.61	2.30 ± 2.4	1.69 ± 1.54
Lactates	Gr N	1.53 ± 0.67	2.34 ± 1.37	3.16 ± 1.52	2.62 ± 0.92	2.43 ± 0.98	2.46 ± 0.7	2.50 ± 0.83	2.35 ± 0.75	2.16 ± 074	2.16 ± 0.90	2.01 ± 0.98	1.79 ± 0.89	1.75 ± 0.97
pH	Gr F	7.38 ± 0.01	7.36 ± 0.03	7.32 ± 0.01	7.33 ± 0.01*	7.35 ± 0.04	7.33 ± 0.01*	7.35 ± 0.07	7.41 ± 0.04	7.33 ± 0.02	7.35 ± 0.04	7.34 ± 0.11	7.35 ± 0.13	7.29 ± 0.13
pH	Gr N	7.39 ± 0.06	7.40 ± 0.05	7.37 ± 0.06	7.4 ± 0.05	7.40 ± 0.05	7.38 ± 0.05	7.38 ± 0.06	7.38 ± 0.04	7.39 ± 0.06	7.39 ± 0.05	7.39 ± 0.05	7.38 ± 0.04	7.40 ± 0.05