Module 9

Question 1

what is a negative pressure within a cartridge prior to injecting to determine if needle is within a blood vessel

Answer 1

aspiration test

Question 2

what does blood entering the carpule indicate

Answer 2

positive aspiration

Question 3

what does no blood and a small bubble entering the carpule indicate

Answer 3

negative aspiration

Question 4

what is the angled surface of the needle tip

Answer 4

bevel

Question 5

what is the diameter of a needle called

Answer 5

gauge

Question 6

the __ the gauge the __ the diameter

Answer 6

larger, smaller

Question 7

what is the weakest part of the needle

Answer 7

hub

Question 8

what is the function of the hub

Answer 8

attaches needle to syringe adaptor

Question 9

the hub can be what two materials

Answer 9

aluminum or plastic

Question 10

what does a plastic hub allow for

Answer 10

movement to align the bevel

Question 11

what is the end of the needle shaft that penetrates the diaphragm of the carpule

Answer 11

carpule-penetrating end

Question 12

when is the carpule-penetrating end placed

Answer 12

after carpule loaded + harpoon is engaged

Question 13

what are the two lengths of needles commonly used in dentistry

Answer 13

32 mm & 20 mm

Question 14

what is the needle length selection based on

Answer 14

amount of tissue that must be penetrated to reach the target location

Question 15

a needle should never be inserted to the ___

Answer 15

hub

Question 16

long needle is ALWAYS required for a ____

Answer 16

mandibular block

Question 17

what does a blue labeled needle indicate

Answer 17

30 gauge short (20 mm)

Question 18

what does a yellow labeled needle indicate

Answer 18

27 gauge short (20 mm)

Question 19

what does an orange labeled needle indicate

Answer 19

27 gauge long (32 mm)

Question 20

what does a red labeled needle indicate

Answer 20

25 gauge long (32 mm)

Question 21

a local anesthetic carpule is __ mL, the solution takes up __ mL and the stopper takes up __ mL

Answer 21

2.0
1.8
0.2

Question 22

what are the steps of handling needles

Answer 22

• each needle only used on one patient
• plastic shield remains over needle until ready to inject
• needle should be replaced after 3-4 penetrations
• immediately cover needle with plastic shield after use using the 1-handed scoop re-capping technique
• know where an uncovered needle is at all times
• if needle becomes contaminated, then recap and dispose and replace needle
• place all contaminated needles in approved sharps containers

Question 23

after how many penetrations should a need be replaced

Answer 23

3 to 4