Using AyFlux results with CSV, R, PK-Sim, and MoBi

Export results from AyFlux

On the simulator's Concentration tab, open the single Export CSV… dropdown and choose Detailed results for AyFlux's wide-format data, or R / OSP tidy for the long-format CSV. Selecting an option starts the download with time in hours, scenario, analyte, model statistic, concentration in mg/L, and interval coverage.

The tidy file includes plasma and CSF acyclovir, plasma and CSF CMMG, and modeled lower, median, and upper curves across scenarios. Each concentration is a model result, not a patient measurement.

Compare external CSV directly in AyFlux

Open the simulator's Research tools tab, import a PK-Sim or MoBi results CSV, and choose its time and concentration columns and units. AyFlux draws the two concentration curves together, plots their difference, and reports curve-to-curve error metrics. Imported data remain in the browser. This is not native model import or clinical validation.

Read and compare in R

Use the AyFlux R example to read one scenario and compare it with a time series exported by PK-Sim or MoBi. It uses base R and asks you to choose the exact OSP columns and units rather than guessing.

source("interop/ayflux_compare.R")
ayflux <- read_ayflux_curve("ayflux_results_tidy.csv",
                            scenario = "Intermittent HD")
plot(ayflux$time_hours, ayflux$concentration_mg_L,
     type = "l", xlab = "Time (h)", ylab = "mg/L")

The full exchange guide explains column names and comparing an OSP export.

What works with PK-Sim and MoBi?

Open Systems Pharmacology tools can export model results as CSV. You can compare those results against AyFlux in R after matching time, concentration units, dosing, dialysis settings, and sampling compartment.

Important: AyFlux does not create a native PK-Sim or MoBi model. The OSP .pkml format contains model structure, not just results. AyFlux's CSV is not a substitute for .pkml, and direct import into OSP has not been verified for this schema.

Before comparing models

• Use the same drug, administered dose and route, and simulation timeline.
• Check whether values are in mg/L, µg/mL, or a molar unit before comparing them.
• Match plasma with plasma. Do not treat a CSF or CMMG curve as equivalent to a plasma acyclovir curve.
• Account for differences in kidney function, dialysis scheduling, and model structure.
• Recognize that agreement between two models is not independent clinical validation.

For more detail, see PK-Sim's import/export documentation and the OSPSuite-R project.