Читать книгу 40 Years of Continuous Renal Replacement Therapy - Группа авторов - Страница 14

Originally, ultrafiltration control was done manually and transmembrane pressure was modified by positioning the ultrafiltrate (UF) collecting bag at different heights in respect to the filter. The replacement solution was delivered using manually regulated clamps. The negative pressure generated by the UF column regulated the final transmembrane pressure. Subsequently, manual systems were, in some cases, substituted by automatic fluid balance systems called Equaline [6]. The systems operated by gravity utilizing 2 load cells for UF and SF measurement, and a smart clamp provided adequate SF flow to achieve the desired fluid balance.