A woman is in premature labor. Lecithin-sphingomyelin (L/S) levels are being drawn. Which level would the nurse interpret as indicating lung maturity?
1. A level over 400
2. A ratio of 1:2
3. A level under 200
4. A ratio of 2:1
4
Rationale 1: L/S levels are reported as a ratio.
Rationale 2: The desired ratio is 2:1.
Rationale 3: L/S levels are reported as a ratio.
Rationale 4: The L/S ratio of 2:1 indicates lung maturity.
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