Local Anesthesia CDCA Practice Questions Answers 100% correct

Local Anesthesia CDCA Practice Questions Answers 100% correct V3 exists from which foramen? ovale When performing the IA, how far should the needle penetrate? 3/4 How do you dispose of the syringe armamentarium? Sharps Container What is the longest you should leave a lidocaine topical patch on? 15 minutes What tissue is the easiest to anesthetize with topical anesthetic? Non-keratinized What injections do you give for perio treatment on #14, 15, 16? PSA, GP, MSA What nerve supplies the tissue of the maxillary anterior lingual? Nasopalatine What nerve has been anesthetized if the lower lip is numb? Mental What nerve has been anesthetized if the soft palate is numb? Greater Palatine (lesser palatine) A woman has immediate swelling on her face following PSA injection. What was the cause? Needle entered the ptyergoid plexus of veins What is the immediate treatment in the office for a hematoma? Pressure, then ice What is the recommended treatment of the patient for a hematoma following the appointment? Ice then moist heat What causes trismus? Needle entering muscle. What is the patient care for tismus? Exercise the jaw, oral analgesics When does anesthetic shelf life expire? When date on side of cartridge states If you give a PSA, what root may not be anesthetized? Mesial buccal root of first molar V3 innervates all but? Mental, IA, Infraorbital, preauricular Where is the injection site for the buccal injection? ... What would you not use for an intraoral antiseptic on an injection site? Alcohol The maxillary nerve is primarily? Sensory, Motor or Both? ... If you inject 1/3 of the needle on an IA and hit bone, what do you do? retract needle from bone, readjust syringe so needle is pointing more posteriorly along the mandible. What is the most common cause of needle breakage? Bending the needle, patient sudden movement Inserting the needle too far in this injection risks hitting the pterygoid plexus? PSA Patient experiences a sharp tingling pain and immediate anesthesia; what happened? Contacted the nerve sheath What should be the depth of the needle insertion for a PSA? 2/3 What gauge needle should be used for infiltration? 27 What is the purpose of vasoconstrictors? hemostasis, anesthesia duration What function do vasoconstrictors serve to prevent overdose? ... A patient has liver damage; what should you consider about amides? ... The reason for most cases of post injection infection is? contaminated needle What is the preservative of anesthetic solution? sodium bisulfite If the patient has atypical plasma cholinesterase, what drug will they have a problem metabolizing? esters The patient is experiencing difficulty breathing and goes unconscious- what should you give them? Oxygen When is the most important time to aspirate during injections? before depositing LA What nerve has been anesthetized if the anterior 2/3rds of the tongue is numb? lingual usually via the IA If you inject 1ml per minute, what is the expected outcome? successful, atraumatic injection If a patient received two cartridges of anesthetic, how much volume did they receive? 3.6ml The patient experiences burning during injection- what is the probable cause? Injected too fast Patient has significant infection. What caused the difficulty of the patient achieving anesthesia? pH balance of infection creates acidic environment, LA cannot bind to nerve receptors. What probably caused a lesion on the lower lip that was present the following day of a local anesthesia injection? Self-injury What is the volume of a single cartridge of local anesthetic? 1.8 ml What is the purpose of sodium bisulfite being added to anesthetic? preservative for vasoconstrictor What function does sodium chloride provide in anesthetic solution? tissue compatibility Needle gauge- what lumen is the smallest? 30 (the bigger the number, the smaller the opening) What is a possible cause of pain upon removal of the needle? barbed needle Why don't we insert the needle to the hub? If the needle were to break off, there would be nothing "sticking out" to grab it to remove it. What tissue is topical anesthetic least effective on? keratinized, hard palate What part of the syringe indicates it is an aspirating syringe? Harpoon How should the needle usually be oriented? toward the bone what proper safety when recapping the needle? scoop method Local anesthetics decrease the (depolarization or repolarization?) phase of the action potential. Depolarization What happens during depolarization? ...