Spanish to English Medical Medical (general) Hospital Nursing Records -- Fluid Balance

This term appears on a nursing form titled Balance Hídrico wherein all the patient's fluids are measured ... all the stuff that goes into and out of the patient.
Under a column titled "INGRESOS" we have several categories:

Solucion // Coloco // *Paso* // Oral // Total Ingreso

Under the "paso" category there is a column of numbers "500", "300, "200" repeated, to match the "solucion" that was administered. Under "solución", what I can read says SF. or "solucion fisiologica". "dextrosa", "cl K" or "SF + Cl K"

(This is a partner to my other question on "coloco" ... keeping them separate for our ProZ hosts.)

I would really appreciate an explanation of this coloco/paso interplay, and how you would translate "paso" here, in the context of these nursing notes.

Thanks for your help :)

The chart is from Buenos Aires