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the graduated tubular outer portion of the syringe; he outer wall of the barrel has a scale calibrated in mL's or minims and the inner wall must remain sterile
the distal end of the plunger; the only part of the plunger which can be touched in order to maintain sterility
prefilled medication cartridge
commercially prepared single dose medication that has a needle permanently attached to a calibrated barrel
the solid inner movable portion of a syringe that is pushed within the barrel, via the knob, to administer liquid medication
syringe that comes with the needle already attached and is equipped with a retraction device that retracts the needle into the syringe once the injection is complete
the small end of the syringe that fits into the needle hub when assembling the needle and syringe together; it must remain sterile
air lock technique
clears the needle of medication and seals the track so that the medication does not flow back into the subcutaneous tissue
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