Iatrogenic Deficiencies in ICU Patients With Prolonged Continuous Renal Replacement Therapy

ICU patients are recruited after at least 5 days treatment with continuous renal replacement therapy. Blood samples are drawn at time of recruitment and then every 3-5 days until ceseation of renal replacement therapy.

Samples will be analyzed for concentrations of trace elements, vitamins and amino acids.

10 adult ICU patients treated for two weeks without renal replacement therapy will be sampled at one time point to serve as controls.