Skin mottling score assesses peripheral tissue hypoperfusion in critically ill patients following cardiac surgery

BMC Anesthesiology

Table 3 Correlation of conventional circulatory parameters with SMS

Population	Parameters	MAP	UO	Lactate	Δlactate	ΔPCO₂	CRT	ScvO₂	VIS
All patients	ρ with SMS	-0.11	-0.19	0.28	0.11	-0.03	0.50	-0.09	0.39
	p value	0.298	< 0.001	< 0.001	0.052	0.578	< 0.001	0.092	< 0.001
	OR for mottling	0.95 (0.90–0.99)	0.03 (0.01–0.17)	1.28 (1.14–1.44)	2.35 (1.50–3.67)	1.02 (0.95–1.09)	2.15 (1.54–2.99)	0.95 (0.92–0.99)	1.03 (1.01–1.05)
	p value	0.027	< 0.001	< 0.001	< 0.001	0.649	< 0.001	0.019	0.008
Hypotension	ρ with SMS	-0.21	-0.22	0.40	0.15	-0.01	0.61	-0.15	0.50
	p value	0.004	0.002	< 0.001	0.046	0.973	< 0.001	0.049	< 0.001
	OR for mottling	0.92 (0.86–0.98)	0.01 (0–0.17)	1.32 (1.14–1.53)	2.18 (1.36–3.5)	1.03 (0.96–1.11)	1.9 (1.36–2.65)	0.94 (0.90–0.98)	1.02 (1.00–1.05)
	p value	0.009	0.002	< 0.001	0.001	0.361	< 0.001	0.008	0.045
Shock	ρ with SMS	-0.32	-0.36	0.39	0.27	-0.14	0.67	-0.13	0.02
	p value	0.023	0.010	0.005	0.060	0.339	< 0.001	0.355	< 0.001
	OR for mottling	0.90 (0.82–0.99)	0.01 (0–0.48)	1.22 (1.00–1.48)	1.96 (1.18–3.25)	1.00 (0.91–1.11)	1.73 (1.10–2.71)	0.96 (0.91–1.01)	1.02 (0.99–1.04)
	p value	0.025	0.018	0.046	0.009	0.925	0.017	0.095	0.155

SMS: skin mottling score; MAP: mean arterial pressure; UO: urine volume; ΔLactate: lactate change over 2 h; CRT: capillary refill time; ScvO₂: central venous oxygen saturation; VIS: vasoactive inotropic score; ΔPCO₂: venous-to-arterial carbon dioxide partial pressure difference; OR: odd ratio; ρ: correlation coefficient

ISSN: 1471-2253