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. Author manuscript; available in PMC: 2018 Jan 1.
Published in final edited form as: J Thorac Cardiovasc Surg. 2016 Sep 22;153(1):197–204. doi: 10.1016/j.jtcvs.2016.09.029

Table 1.

Summary of grading criteria for the Lung Injury Severity Score. Maximum score is 9 and minimum is 0.

Score PMN’s per HPF Alveolar Edema Interstitial Inflammation
0 <5 <5% None
1 6–10 6–25% Minimal
2 11–20 26–50% Moderate
3 >20 >50% Severe