17 Questions
What is the primary mechanism of action of local anesthetics?
Blocking the nerves from the affected part of the body
What is the effect of topical anesthesia?
Short-lasting pain relief limited to the area of contact
What is the purpose of a spinal anesthesia?
To act on spinal nerve roots and part of the spinal cord
What is a characteristic of regional anesthesia (Bier's block)?
Blocking the blood circulation of the part of the body to be anesthetized
What is the main effect of local anesthetics on the nervous system?
Afferent nervous system
What is the application of local injection anesthesia?
At the end of surgery to produce long-lasting post-surgical analgesia
What is the effect of adding a vasoconstrictive agent to a local anesthetic solution?
Decreased perfusion of blood to the injected area
What is the significance of the 1:100,000 dilution of epinephrine in a local anesthetic solution?
1 gram of epinephrine in 100,000 milliliters of solution
What is the chemical structure of Lidocaine Hydrochloride?
NH(C2H5)2 CH3 NHCOCH2N(C2H5)2.HCl.H2O
What is the purpose of adding vasoconstrictors to local anesthetics?
To counteract the vasodilatory effect of the anesthetic
What is the consequence of using a local anesthetic with a vasoconstrictive agent on the duration of action?
The duration of action is increased
What is a limitation of using sprays for topical application of local anesthetic agents?
Difficulty in controlling the quantity of drug administered
Why are vasoconstrictors added to the solution of local anesthetics?
To counteract the vasodilatory effects of local anesthetics
What is the effect of acidic surroundings on topically applied local anesthetic agents?
It hampers their effective absorption
What is the difference in concentration of lidocaine between injectable and topical forms?
Injectable form is 1%, topical form is 5-10%
What is a consideration for the use of patches in topical application of local anesthetics?
They work best when applied to dry or dried areas
What is the chemical structure of benzocaine?
CH2N NH CH3 CH3
Test your knowledge of topical local anesthetics, their uses, and characteristics. Learn about benzocaine, eugenol, and other anesthetics used in sunburn creams, skin creams, and more. Identify the benefits and considerations of using these anesthetics in different forms.
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