Injectable Anesthetics Flashcards
What are the priorities for induction of anesthesia?
Rapidly secure airways and give oxygen
Maintain cardiovascular function
Induce/maintain anesthesia
Ketamine
Relatively safe anesthetic Analgesic effect Increases cerebral blood flow and volume Catatonic state Cause Dysphoria
What receptors does Ketamine act on?
NMDA receptors - Antagonist
CV effects of Ketamine
Negative inotropy
catecholamine release
increases in HR and contractility
Respiratory effects of Ketamine
Minimal respiratory depression
Apneustic breathing
Bronchodilation
Factors increasing cerebral blood volume
Hypercapnia Hypoxia Hypertension Coughing vomiting
CNS effects of ketamine
Cerebral vasodilation: intracerebral volume and pressure increase ICP
Other effects of Ketamine
Muscle tone increased
Increased salivation
Open eyes
Intraocular pressure increases
CV effects of Propofol
Vasodilation
Respiratory effects of Propofol
Apnea
CNS effects of Propofol
Intracerebral blood volume and ICP decreases
Cerebral metabolic O2 consumption decreases
antiepileptic effect
Propofol in cats
May cause hemolysis and Heinz body anemia
Pain during injection
What is the drug of choice for C-sections?
Propofol
What is the most common induction agent?
Propofol
What is the distribution order of thiopental?
- Vessel rich group
- Muscle Group
- Fat group