Freedom 60® Flow Rate Calculator
— Select Tubing Set —
F10 (Very Slow – approx 10 mL/hr)
F30 (Slow – approx 30 mL/hr)
F45 (Slow – approx 45 mL/hr)
F60 (Standard – approx 60 mL/hr)
F120 (Standard – approx 120 mL/hr)
F180 (Fast – approx 180 mL/hr)
F275 (Fast – approx 275 mL/hr)
F420 (Rapid – approx 420 mL/hr)
F500 (Rapid – approx 500 mL/hr)
F600 (Rapid – approx 600 mL/hr)
F900 (High Flow – approx 900 mL/hr)
F1200 (High Flow – approx 1200 mL/hr)
F2400 (High Flow – approx 2400 mL/hr)
None (Standard Saline/Nominal)
Slightly Viscous (Approx -10% Flow)
Moderately Viscous (Approx -20% Flow)
Highly Viscous/Cold (Approx -30% Flow)
Nominal Flow Rate: 0 mL/hr
Adjusted Flow Rate: 0 mL/hr
0 hr 00 min
*Calculation is an estimate based on nominal tubing ratings. Actual flow rates vary based on medication viscosity, temperature, needle gauge, and site location.
Understanding the Freedom 60 Flow Rate System
The Freedom 60® syringe infusion system operates on a principle of dynamic equilibrium, utilizing constant pressure and specific precision tubing to control the flow rate of subcutaneous medications. Unlike electronic pumps that push fluid at a set programmed rate regardless of resistance, the Freedom 60 adjusts naturally to the body's absorption capabilities, but the baseline speed is determined by the Precision Flow Rate Tubing™ sets.
How Tubing Determines Flow Rate
The "F-Numbers" on KORU Medical Systems tubing sets (e.g., F120, F420) correspond roughly to the flow rate in milliliters per hour (mL/hr) under nominal conditions (room temperature, low viscosity). Selecting the correct tubing is the primary method for controlling infusion duration.
| Tubing Set | Nominal Flow Rate | Typical Use Cases |
|---|---|---|
| F60 – F120 | 60 – 120 mL/hr | Initial therapy, sensitive patients, or viscous drugs requiring slower administration. |
| F180 – F420 | 180 – 420 mL/hr | Maintenance therapy for established patients tolerating standard flow. |
| F600 – F2400 | 600 – 2400 mL/hr | High volume rapid infusions or antibiotics (often used with Freedom Edge® or large volume 60). |
Using the Calculator
This calculator helps clinicians and patients estimate the infusion time based on the prescribed volume and the selected tubing set. Here is how to interpret the inputs:
- Total Volume (mL): The total amount of medication loaded into the syringe(s) for the session.
- Tubing Set (F-Number): The specific tubing model number printed on the package. The number indicates the theoretical flow rate.
- Viscosity Adjustment: Immunoglobulins (IgG) are often more viscous than saline. Cold medication or high concentration drugs flow slower. Use the adjustment dropdown to estimate real-world time if the medication is known to be thick or cold.
Variables Affecting Actual Flow Rate
While the tubing sets the maximum potential rate, several physical factors can slow down the infusion:
- Temperature: Cold medication flows significantly slower. It is always recommended to allow medication to reach room temperature before infusion.
- Viscosity: 20% concentration solutions flow slower than 10% solutions through the same tubing.
- Needle Gauge & Length: Using a smaller gauge needle (higher number, e.g., 26G vs 24G) adds resistance, potentially slowing the flow if the tubing rate is high.
- Site Absorption: Tissue resistance at the subcutaneous site can vary by patient and location.