Overview

Question 1

What are the sections of a needle

Answer 1

Hub
Shaft
Bevel

Question 2

What is the bevel

Answer 2

Defines the point or tip of the needle, providing cutting surface to penetrate
mucosa with as little resistance as possible

Question 3

What is the gauge of a needle

Answer 3

Diameter of the lumen of the needle
* < gauge number = > diameter of the lumen
* 30-gauge has smaller internal diameter than a 25-gauge needle
* Patients cannot differentiate between 23,25,27 and 30 gauge needles
* > gauge needles result in less deflection as pass through tissues = > accuracy
* > gauge reduces risk of breakage
* > gauge easier aspiration – resistance to flow is greater with smaller gauged needles

Question 4

What is the diaphragm in relation to a cartridge

Answer 4

The puncture whole in the cap where the LA exits

Question 5

What are the preparation steps for LA

Answer 5

1 - Collect syringe handle and needle
2 - Collect selected local anesthetic cartridge
3 - Unpack everything and record details for contamination
4 - Assemble the the syringe handle and attach bung
5 - Load the cartridge
6 - Connect the handle (click into place)
7 - Pull back sheath, prepare needle
8 - Remove cap and re-sheath