Table 1.

Modified Marshall scale for assessing organ failure. The score incorporates the degree of lung, renal, and cardiovascular failure.

Parameter	Score
	0	1	2	3	4
PaO2/FiO2 ratio	>400	301-400	201-300	101-200	≤101
Serum creatinine level (mg/dL)	<1.4	1.4-1.8	1.9-3.6	3.6-4.9	>4.9
Systolic blood pressure (mm Hg)†	>90	<90, fluid responsive	<90, not fluid responsive	<90, pH < 7.3	<90, pH < 7.2

A score of ≥2 in any system defines the presence of organ failure. The PaO₂/FiO₂ value can be estimated using SPO₂ approximation for PaO₂.

^†Off ionotropic support.