Anesthetic Pharmacology and Cardiopulmonary Monitoring in Veterinary Practice

Veterinary anaesthesia integrates a deep understanding of drug action with meticulous monitoring of cardiovascular and respiratory function to ensure animal welfare and procedural success. Agents such as propofol, etomidate, dexmedetomidine and alfaxalone differ in onset, duration and side‐effect profile, necessitating tailored protocols for species, age and health status. Advances in pharmacokinetic modelling permit dose optimisation, while pharmacodynamic insights guide choice of adjuncts for balanced anaesthesia. Critical monitoring parameters include heart rate, blood pressure, arterial oxygenation and depth of anaesthesia, assessed via tools such as invasive arterial catheters, pulse oximetry and electroencephalographic indices. Echocardiography and continuous flow measurements further refine assessment of cardiac output and stroke volume. In field and clinical settings, adjustments for hepatic or renal impairment, use of rescue interventions for opioid‐induced hypoventilation and targeted reversal of sedatives are essential. Integration of predictive models with real-time physiological data is driving a shift towards precision anaesthesia, enhancing safety across companion, production and wildlife species.

Research from Nature Portfolio

Recent studies have provided a rigorous evaluation of two formulations of etomidate fat emulsion in healthy human volunteers, offering translational insight for veterinary use. A randomised, open-label, two-period crossover design compared pharmacokinetic and pharmacodynamic profiles of test and reference emulsions under intravenous infusion. Results demonstrated bioequivalence across key parameters including maximum plasma concentration, area under the curve, and bispectral index suppression, all within accepted confidence intervals. Both formulations exhibited favourable safety and tolerability, with no serious adverse events. These findings underpin potential interchangeable use of etomidate preparations in clinical practice, supporting flexible formulation choices in veterinary anaesthetic induction and maintenance.

Anesthetic Pharmacology and Cardiopulmonary Monitoring in Veterinary Practice publication trend

The graph below shows the total number of articles in anesthetic pharmacology and cardiopulmonary monitoring in veterinary practice across all publications each year (not limited to Nature Index journals).

Technical terms

Physiologically based pharmacokinetic (PBPK) model: mathematical framework using anatomical, physiological and biochemical parameters to predict drug distribution and concentration over time.

Therapeutic window: the drug concentration range within which a therapeutic effect is achieved without causing toxicity.

Mean arterial pressure (MAP): the average blood pressure in the arteries during a cardiac cycle, indicating overall blood flow to organs.

Cardiac output (CO): the volume of blood the heart pumps per minute, calculated as heart rate multiplied by stroke volume.

Bispectral index (BIS): an electroencephalographic-derived numerical scale (0–100) used to assess depth of anaesthesia.

References

1. Advances in Canine Anesthesia: Physiologically Based Pharmacokinetic Modeling for Predicting Propofol Plasma Profiles in Canines with Hepatic Impairment. Pharmaceuticals (2024).
2. Pharmacokinetic and pharmacodynamic evaluation study of etomidate: a randomized, open-label, 2-period crossover study in healthy Chinese subjects. Scientific Reports (2024).
3. Efficacy and Safety of Dexmedetomidine Premedication in Balanced Anesthesia: A Systematic Review and Meta-Analysis in Dogs. Animals (2021).
4. Pharmacokinetics of intramuscular alfaxalone and its echocardiographic, cardiopulmonary and sedative effects in healthy dogs. PLOS ONE (2018).