. Author manuscript; available in PMC: 2012 Dec 19.

Published in final edited form as: Am J Cardiol. 2012 Jan 14;109(7):1066–1072. doi: 10.1016/j.amjcard.2011.11.042

Table 1.

Scoring matrix.

	Breathing Efficiency	End-tidal CO₂ (mmHg)	Oxygen saturation (%)	Oxygen pulse
0 (Normal)	<33	>37	>92	>9
1 (Mild)	33 – 38.9	32 – 36.9	88 – 91.9	7.5 – 8.9
2 (Moderate)	39 – 44.9	27 – 31.9	84 – 87.9	6.0 – 7.4
3 (Severe)	45 – 50.9	22 – 26.9	80 – 83.9	4.5 – 5.9
4 (Very Severe)	>51	<22	<80	<4.5