17 Questions
What is the primary effect of local anesthetics on nerve impulses?
They block the conduction of nerve impulses along nerve fibres
Which of the following is NOT a property of an ideal topical anesthetic?
Interacts with other drugs
What is the primary advantage of using anesthetics in ophthalmology and optometric procedures?
They allow for more efficient procedures
What is a potential disadvantage of using anesthetics in ophthalmology procedures?
They may cause hypersensitivity reactions
Which of the following is an indication for the use of anesthetics?
Contact lens fitting
What is the order of blockade of nerve fibres by local anesthetics?
Pain, touch, temperature, motor
What is the classification of cocaine in terms of anesthetic type?
Ester
What is the probable cause of delayed healing in cases of trauma to corneal epithelium in patients using mydriatics?
Action of preservative in multiuse bottles
What is a major disadvantage of using cocaine as an anesthetic?
Its high toxicity and potential for dependence
What is the result of the influx of sodium ions in nerve transmission?
Depolarization, causing a positive charge
What is a characteristic of amide-type anesthetics?
High lipid solubility and long duration of action
What is the purpose of using proxymetacaine hydrochloride in optometry?
To reduce the discomfort of anesthesia administration
Which type of nerve fibers are more sensitive to blockade by local anaesthetics?
Small nerve fibers
What is the legal status of cocaine for optometrists in practice?
It is not legally available for use
What is the significance of protein binding in local anesthetics?
It affects the duration of action of the anesthetic
What is the primary difference between ester- and amide-type anesthetics?
Their chemical structure
What is the mechanism by which local anaesthetics cause a return to resting potential?
Influx of potassium ions
Test your knowledge on local anesthetics, including their definition, types, mode of action, effects, and side effects. Learn about the properties of an ideal topical anesthetic and how they work on nerve fibres. Get ready to block out pain and more!
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
