Anesthetic Induction Agents and Techniques

Intravenous Induction Agents

The American Society of Anesthesiologists recommends propofol as the most commonly used IV induction agent due to its rapid onset and recovery profiles 1
Etomidate is a GABA receptor modulator with a different hemodynamic profile, making it useful in hemodynamically unstable patients 1
Ketamine is an NMDA receptor antagonist with sympathomimetic effects, producing dose-dependent increases in heart rate, blood pressure, and cardiac output 2
Midazolam is a benzodiazepine that enhances GABA effects, often used in co-induction techniques with propofol to reduce propofol requirements and risk of awareness 1

Sevoflurane is preferred for both induction and maintenance due to its rapid onset/offset and less airway irritation 1
Desflurane allows rapid emergence but has a higher environmental impact 1
Nitrous oxide is used as an adjunct rather than primary agent, but its use should be minimized due to environmental concerns 1

Non-depolarizing agents, such as rocuronium, vecuronium, and cisatracurium, are preferred for facilitating intubation and providing muscle relaxation 1
Succinylcholine is used for rapid sequence induction but should be avoided in patients with myopathies 1

Pre-oxygenation is essential before induction to prevent desaturation 3
Cricoid pressure should be applied during induction to reduce aspiration risk but may be released if it impairs laryngoscopy view 3
Patient factors, such as age, hemodynamic status, and comorbidities, should be considered when selecting induction agents 3
Environmental impact should be considered when choosing induction agents, with agents like sevoflurane having a lower environmental footprint 1