Does anyone know the biological variability of plasma ammonia?

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Francisco José Oliveira Freitas

Still not available.

Jasna Lenicek Krleza

I agree with Francisco Freitas. Biological variability of plasma ammonia still not availabe. Available is only output ammonia in 24 hour urine: Ammonia (output, 24h, urine): within-subject biologic variation: 24.7; between-subject biologic variation: 27.3; desirable specification for imprecision: 12.4%; desirable specification for inaccuracy: 9.2%; desirable specification for allowable total error: 29.6%. (Avaliable at: http://www.westgard.com/biodatabase1.htm).