Chapter 2: Needles Flashcards
A disposable needle has a color-coded hub that indicates?
The gauge and length.
The needle’s gauge is determined by?
The diameter of the lumen, or opening, at its beveled tip.
Common needle gauges (G) range from?
16 to 32 and their lengths vary from 3/8 to 2 inches.
Why are Gauge numbers arranged?
So that the highest number represents the smallest needle width while the lowest number represents the largest width.
What is an example of Gauge numbers?
25-gauge needle is much smaller than a 16-gauge needle.
Shorter needles are used to?
Inject something right underneath the skin, whereas longer length needles are used to inject something into the muscles.
Always choose a needle with?
Sufficient length to reach the desired tissue level.
A large person may require a longer needle to?
Reach the correct body tissue than would be required for a smaller person.
What is another consideration in needle-gauge selection?
Thickness of a liquid medication or its viscosity.
What does high viscosity would use?
A wider width needle or a needle with a low-gauge number.
