Dr. Celian Teng
Lecture #3 (12/7/16 & 12/9/16)
Anesthesiology
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Armamentarium
1.
Syringe
2.
Needle
3.
Cartridge
Dental Cartridge Syringe
-
one of the 3 essential components of the local
anaesthetic armamentarium
Criteria for Acceptable Syringe
1.
Durable and able to withstand sterilisation
without damage (if the unit is disposable it
would be packaged in a sterile container)
2.
Capable of accepting wide variety of
cartridges and needles of different
manufacturers and should permit repeated
use
3.
Inexpensive, self contained lightweight and
simple to use with one hand
4.
Should provide for effective aspiration and
be constructed so that blood may be easily
observed in the cartridge
•
The old type is non-aspirating
Parts
Types:
I.
Non Disposable
A.
Breech Loading, Metallic, Cartridge type,
Aspirating
•
most commonly used in dentistry
•
Breech loading - cartridge is inserted
into the syringe from the side of the
barrel
•
the needle is attached to the barrel of
the syringe at the needle adaptor
•
has a short , hook shaped end
(harpoon) attached at the piston that is
used to prevent the silicon rubber
stopper
•
thumb ring and finger grip - give the
administrator added control over the
syringe
a)
Finger Grip
b)
Thumb Ring
B.
Breech Loading, Plastic, Cartridge type,
Aspirating
C.
Breech Loading, Metallic, Cartridge type,
Self aspirating
Advantages
Disadvantages
Visible Cartridge
Weight
Aspiration with 1 hand
Syringe may be too bof
for small operators
Autoclvable
Possibility of infection
with improper care
Rust resistant
Long lasting with proper
maintenance
Denise Roman
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Dr. Celian Teng
Lecture #3 (12/7/16 & 12/9/16)
Anesthesiology
Page
of
2
6
-
a metal projection within the barrel
depresses the diaphragm of the local
anaesthetic cartridge
-
pressure on he thumb disc (arrow)
increases pressure within the cartridge.
Release of pressure on the thumb disc
produces self-aspiration test
D.
Pressure Syringe for Periodontal
Ligament Injection
E.
Jet injector (“Needle Less” Syringe)
II.
Disposable Syringes
III.
Safety Syringes
•
The sliding cap makes it safe
IV.
Computer assisted Local Anesthetic
Delivery System
Care and Handling
1.
After each use, the syringe should be
throughly washed and rinsed so as to be
free of any local anaesthetic solution, saliva
or other foreign matter. The syringe should
be autoclaved in the same manner as other
surgical instruments
2.
Every 5 autoclaves - it must be oiled
•
Following repeated autoclaving, the syringe
should be dismantled and lubricated at all
threaded joints with a light oil
3.
Harpoon should be cleaned with a brush
after each use
4.
To ensure reliable aspiration, the piston and
harpoon should be replaced if the harpoon
loses its sharpness and readily disengages
from the rubber stopper of the cartridge of
the harpoon is bent
Problems of Syringes
1.
Leakage during injection
•
- Summer '18
