L214/215 Flashcards
Dentist who game first successful demonstration of ether anesthesia
William Thomas Green Morton
MAC
Minimum alveolar concentration: Concentration at which 50 percent of patients do not respond to stimulus
Nitrous oxide guy who committed suicide
Horace Wells
Meyer-Overton correlation
Anesthesia begins when anesthetic reaches critical concentration in membrane lipids (high correlation with solubility in olive oil)
Good targets for anesthetics
ligand gate ion channels
GABA recepotrs
Competition between anesthetics and action potentials
Synaptic transmission more sensitive to anesthetics
Structures important for consciousness
Reticular activating formation
Thalamic loop
Structures important for memory
Limbic system
Stages of anesthesia
Analgesic (induction)
Excitement
Surgical anesthesia
Medullary paralysis (bad)
Low blood:gas coefficient vs
High blood:gas coefficient
Low: faster induction and recovery
High: Slower induction and recovery
Nitrous oxide properties
Low solubility
High MAC
Fast onset, fast recovery
Barbiturate mechanism of action
Potential GABA-A receptors
Barbituate times Ultra short Short Intermediate Long
Ultra-short 15-30 minutes
Short 2-4 hours
Intermediate 4-6 hours
Long 6-8 hours
Benefits of IV barbituates
Rapid distribution
Reduced cardiac depression
No risk of malignant hyperthermia
Eliminate occupational risk of volatile
Methoxhexital
How fast, duration
Very fast, short duration
5-7 minutes