Constant Rate Infusion (CRI) Calculator
Clinical judgment required. This calculator is a decision-support tool, not a substitute for veterinary consultation.
Constant Rate Infusion (CRI) CalculatorCanineFeline
Calculate constant rate infusion (CRI) for dogs and cats. Computes drug dose per hour, volume of drug to add to a fluid bag, and bag run rate for continuous IV drug delivery. Supports common CRI drugs including lidocaine, ketamine, fentanyl, morphine, dopamine, dobutamine, and metoclopramide. Used for intraoperative analgesia protocols (MLK, FLK), post-surgical pain management, vasopressor support, ICU drug infusions, and anti-emetic therapy. Enter patient weight, drug concentration, and desired infusion rate to calculate volumes. Common query: 'CRI calculator for fentanyl' or 'how to set up a lidocaine drip'.
mg/mL
mcg/kg/min
Drug Required
—mg/hr
Bag Run Rate
—mL/hr
Drug to Add to Bag
—mg
Volume to Draw Up
—mL