Infusion Pump Peristaltic Flow Calculator
Medical device mechanics & infusion technology: Calculate rotary peristaltic IV pump delivery rate, roller stroke volume ($V_{\text{stroke}}$), motor RPM, and drug dosing bolus volume.
Infusion Tubing Geometry
Standard IV set ID ~2.5–3.0 mm
Center of rotor to tube track
Pump Mechanism & Speed
Typically 3 to 6 rollers (reduces pulsation)
Micro-stepping motor drive speed
Curved platen wrap angle (~180°)
PVC / Silicone elastomeric rebound
Positive Displacement Peristaltic Flow
The fluid volume displaced per rotor revolution is governed by the inner lumen area and the pinched track length:
$$V_{\text{rev}} = \pi \cdot \left(\frac{ID}{2}\right)^2 \cdot \left(2\pi R \cdot \frac{\theta}{360^\circ}\right) \cdot \eta_{\text{resil}}$$
Flow rate $Q = V_{\text{rev}} \cdot \text{RPM}$.
Volumetric Infusion Rate
Infusion Delivery Rate (mL/hr)
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Displacement Flow (mL/min)
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Stroke & Pillow Metrics
Displacement per Revolution
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mL / revolution
Volume per Roller Pinch
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Individual fluid pillow bolus
Pulsation & Delivery Accuracy
Pulsation Frequency:
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Flow Ripple Amplitude:
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Clinical Delivery Classification:
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