Needles Flashcards
In routine venipuncture, a ____ inserted into a vein allows blood to flow out into an evacuated collection tube or syringe.
needle
All _____ used for phlebotomy are sterile, disposable, and used only once.
needles
Inspect each needle package before opening it to be sure that the ____ has not been broken. If it has, discard it.
seal
inspect the needle itself to be sure that it has no ______ _____. The needle should be straight, sharp, beveled, and free of nicks or burrs. Discard any defective needle.
manufacturing defects
: A sharp needle provides smooth entry into the skin with a minimum of pain.
POINT
eases the shaft into the skin and prevents the needle from coring out a plug of tissue.
bevel, or angle
differ in both length and gauge.
Shafts
The needles used for routine venipuncture range from ____ for “butterflies” to ______ long for standard needles.
¾ inches - 1 to 1½ inches
Factors that influence the choice of length include _____ and ______, and the experience and preference of the phlebotomist.
location and depth of the vein
describes the diameter of the needle’s lumen
gauge
the hollow tube within the shaft.
Lumen
The smaller the gauge number, the larger the
lumen diameter
is not a matter of personal preference; it depends on the type of collection and the condition of the patient.
choice of gauge
The largest-diameter needles routinely used in phlebotomy are ____ to ____
21 to 22 gauge
Blood bank uses _____ to _____ needles to collect blood from donors for transfusions.
16- to 18-gauge
The smallest needles commonly used are ___ gauge, for collection from small, fragile veins.
23
A typical gauge for routine adult collection is ___ gauge.
21
deliver blood more quickly but are more damaging to the tissue and may collapse the vein.
Large needles
are less damaging to tissue, but collection is slower, and the blood cells may be hemolyzed as they pass through the narrower opening.
Small needles
: The needle attaches to the collecting tube or syringe at the ___
HUB
MULTISAMPLE NEEDLES:
Multisample/ collections uses ____ needle
Double-ended needle
MULTISAMPLE NEEDLES:
While one tip of the needle penetrates the patient’s skin, the second tip
during blood collection pierces the ____ of an evacuated collection tube.
rubber cap
MULTISAMPLE NEEDLES:
The most common double-ended needle is the ______ which has a _____ ______ _____ that covers the second tip when it is not inserted into a tube.
multisample needle/ retractable rubber sleeve
remains in place in the patient’s vein while one tube is replaced with another
multisample needle