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Local Anesthetics
Pharmacology
27
Medical
Professional
01/16/2012

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Cards

Term
Mech of Action for Local anesthetics
Definition
inhibits Na passage
Term
what is the effect of protein binding on LA's
Definition
high protein binding prolongs duration of action
Term
how pH affect LA's
Definition
they are weak bases, so they will not work in acidic tissues (infections,necrosis)
Term
relationship b/t pKa and onset
Definition
low pka= faster onset
Term
affect on dosage and volume
Definition
increased volume and dosage increases duration and widespread effects
Term
what will the addition of vasoconstrictors do to the LAs
Definition
increase duration of action

**EXCEPT bupivicaine, etidocaine**
Term
the order of loss of nerve function as you increase LA
Definition
Pain, temp, touch, pressure
Term
effect of HCO3- on LA
Definition
speeds onset and prolongs duration of action

**too much will precipiate LA**
Term
toxicity of systemic effects
Definition
CNS excitiation followed by CNS/CV depression
Term
Acidosis decreases what in the patient
Definition
Seizure threshold
Term
What is the CNS toxicity in relation to CV
Definition
CNS at lower concentrations
Term
Which occurs first w/Lidocaine?
Definition
CNS then CV
Term
CV/CNS in Bupivicaine
Definition
equal concentration w/toxicity
Term
when reporting allergies, what must be taken into consideration
Definition
additives such as epinephrine.
Term
LA assoc w/ lumbosacral nerve irritation
Definition
Lidocaine or meipivacaine
Term
LA associated w/Cauda equina syndrome
Definition
lidocaine
Term
this treats bupivicaine toxicity and CNS toxicity
Definition
Intralipid
Term
what is procaine used for?
Definition
diagnose pain syndromes in chronic pain patients
Term
What is chloroprocaine used for
Definition
emergency OB epidural
Term
use for tetracaine
Definition
rapid spinal anesthesia
topical
Term
uses for cocaine
Definition
rapid absorption and onset

potent vasoconstrictor and topical
Term
Use of benzocaine
Definition
slow and short
can cause **methemoglobin**
Term
what is lidocaine used for?
Definition
nerve block
IV antiarrhytmic agent
IV analgesic
Term
Mepivacaine
Definition
common dental anesthetic
NO OB use
Term
Bupivicaine
Definition
greatest separation of sensory from motor block.

used in OB *walking epidural*
less hypotension than tetracaine
Term
Ropivicaine
Definition
similar to bupivicaine
S isomer lowers cardiac toxicity
Term
Etidocaine
Definition
profound motor and sensory blockade
the most profound motor blockade: NO OB use
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