NURS 323 Final Drexel Questions and Correct Answers
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Course
NUR 323
Institution
NUR 323
Local anesthesia -reversibly block all nerve impulses -suppress impulse conduction: blocked only in neurons near the site of admin. (non selective - to increase selectivity, limit the area of admin) -sensation blocked rates: 1st (first) cold -> warmth -> touch -> deep pressure (last) -not ...
NURS 323 Final Drexel Questions and
Correct Answers
Local anesthesia ✅-reversibly block all nerve impulses
-suppress impulse conduction: blocked only in neurons near the site of admin. (non
selective - to increase selectivity, limit the area of admin)
-sensation blocked rates: 1st (first) cold -> warmth -> touch -> deep pressure (last)
-not limited to sensory; may affect motor
Frequently combined with epi: vasoconstriction decreases local blood flow and
decreases toxicity risk (decreases blood flood, delays absorption of anesthetic, less
anesthetic needed)
Adjuncts to inhalation anestesia (preanesthetic meds) ✅benzos: reduce anxiety and
promote amnesia; induce anesthesia or conscious sedation
Opioids: pain relief, cough suppressant
Alpha-2 agonist: increase sedation
Anticholinergic agents (atropine): prevent bradycardia and suppress salivation
Neurotransmitter blocking agents
Local anesthetics adverse effects ✅-cns agitation. Followed by depression
-heart cause suppression of excitability (affects co)
- vessels cause vasodilation
-can cause bradycardia and cns depression in the neonate
-affects mom during birthday process and baby after delivery
Procaine (novocain) ✅ester local anesthetic
-injection only
-rarely used (must be given freq.)
Lidocaine ✅amide local anesthetic
-inactivated by hepatic enzymes
-administered topically and by injection
-also used as an antidysrhythmic agent
-duration of action depends on strength
-addition of epinephrine
-risk of systemic toxicity (locally)
Cocaine ✅topical local anesthetic
-for ent surgery
-significant effects on cns & sns
Tetracaine ✅topical local anesthetic
-for surfaces related to mucous membranes or the skin
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