Maximum Flow Rates and Concentrations for Central and Peripheral Lines

Osmolarity/Concentration Limits

The maximum osmolarity for parenteral nutrition solutions administered through peripheral lines is 850 mOsm/L, according to the Clinical Nutrition guidelines 1, 2
Solutions exceeding this threshold require central venous access due to the risk of thrombophlebitis, with a strong correlation between osmolarity rate and phlebitis risk (r = 0.95) 3
Centrally administered parenteral nutrition has no osmolarity limitation, as vessel tolerance to hyperosmolar solutions is not a limiting factor, allowing it to cover all nutritional needs 4

The American College of Radiology recommends avoiding femoral sites when possible, as subclavian sites have lower infection and thrombosis rates 6
The use of infusion pumps is recommended for all parenteral nutrition administration, regardless of access type, to ensure accurate and consistent delivery 5