Anesthesiology Calculators
Tools for anesthetic dose calculation and perioperative parameters.
Available Calculators
Explore our collection of specialized calculators
What are Anesthesiology Calculators?
Anesthesiology calculators are specialized clinical tools that assist anesthesiologists in anesthetic planning, anesthetic dose calculation, and perioperative risk assessment. They enable calculation of induction and maintenance anesthetic doses, surgical risk estimation by ASA classification, calculation of continuous infusions of anesthetics and sedatives, and determination of intraoperative ventilatory parameters. Based on guidelines from the Brazilian Society of Anesthesiology, international protocols, and anesthetic pharmacokinetics, these calculators optimize anesthetic safety, individualize doses, and contribute to reducing perioperative complications.
When to Use These Tools
- Calculation of weight-based anesthetic induction doses
- Determination of continuous infusion of propofol and remifentanil
- Surgical risk assessment by ASA classification
- Calculation of regional anesthetic block doses
- Adjustment of ventilatory parameters in general anesthesia
- Estimation of intraoperative fluid requirements
Clinical Benefits
Frequently Asked Questions
How to calculate propofol induction dose?
Usual induction dose is 1.5-2.5 mg/kg IV in healthy adults. Reduce to 1-1.5 mg/kg in elderly, ASA III-IV, or hypovolemic patients. Children may require up to 2.5-3.5 mg/kg. Titrate according to clinical response. Always consider ideal weight in obese patients and adjust for comorbidities.
What does ASA classification mean?
ASA (American Society of Anesthesiologists) classifies physical status: ASA I=healthy, II=mild systemic disease, III=severe systemic disease, IV=incapacitating disease with constant threat to life, V=moribund, VI=brain death. Guides anesthetic risk, but does not replace individualized assessment.
How to adjust doses in obese patients?
For lipophilic anesthetics (propofol, fentanyl), use adjusted or ideal body weight. For rocuronium and succinylcholine, use actual weight. For volatile anesthetics, use ideal weight. Individualize according to drug pharmacokinetics and body composition. Obesity alters distribution and clearance of various anesthetics.