Anesthesia Mock Exam

Anesthesia Mock Exam Where does the mandibular nerve pass through in the skull? - Foramen Ovale What is the maxillary division of the trigeminal nerve? - Sensory Which nerve is NOT associated with the mandibular nerve branch? - Infraorbital nerve Which teeth does the PSA injection innervate? - 1st, 2nd, and 3rd maxillary molars * Does not innervate the mesiobuccal cusp of the maxillary 1st molar Which injection is needed to anesthetize linguals of maxillary anteriors? - Nasopalatine Which injections are needed to anesthetize the entire palate on one side? - Greater Palatine & Nasopalatine How far do you insert the needle on an IANB? - 20-25 mm or 3/4 the length of the needle What happens during depolarization? - - Sodium comes in - Potassium goes out When do you aspirate? - Right before anesthetic is deposited * This makes sure you do not insert the needle into a blood vessel Which type of local anesthetic is metabolized by pseudocholinesterase (PABA)? - Esters What kind of tissue is topical anesthetic least effective on? - Keratinized tissues What is true about topical anesthetics? - There are no systemic problems with them Which Ester has the highest occurrence of allergic reactions? - Ester option; Benzocaine * Only applied topically What is the significance of giving an amide anesthetic to a patient with Cirrhosis? - The amide anesthetic is metabolized by the liver What is the landmark for the IANB injection? - Coronoid notch Psychogenic pain - No organic base for the pain What is the maximum epinephrine dose for cardiac & normal patients? - Cardiac- .04mg Normal- .2mg What is trismus? - Limited opening of mouth Management of hematoma - Cold compression & pressure to bleeding site Management of trismus - - Heat therapy - Saline rinses - Asprin - Jaw exercises Hematoma can occur if needle penetrates into the pterygoid plexus of veins during which injection? - PSA What needle should be used for infiltration? - 27 short What is the solution volume of a single cartridge of LA? - 1.7-1.8 ml Which antioxidant prevents biodegration of LA by stoping oxidation of a vasopressor? - Sodium bisulfite What do vasopressors do? - - Increases duration of LA - Hemostasis (stops blood flow) - Reduces chance of toxicity What would cause a dry cornea? - Anesthetizing the facial nerve (VII) - The facial nerve can be anesthetized if bone is not contacted during an IANB injection and anesthetic is deposited into the parotid gland causing bell's palsy - Temporary bell's palsy will not allow the patients eyelid to blink or close, causing a dry cornea How do you calculate the amount of epinephrine in a solution? - 1% solution = 10 X 1.8 (or 1.7) = 18mg (or 17mg) 2% solution = 20 X 1.8 (or 1.7) = 36mg (or 34 mg) 3% solution = 30 X 1.8 (or 1.7) = 54 mg (or 51 mg) What are the causes of burning upon injection? - - Acidic (low) pH of solution - LA injected too fast - Cartridge being wiped with sterilizing solution (alcohol) What causes a needle to break? - - Bending needle - Patient movement