Step by step venipuncture, needle gauges, evacuated tube systems, butterfly sets, tourniquet rules, vein selection and post-puncture care.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What is venipuncture?
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Puncturing a vein, usually in the arm, to collect a blood sample- What is the first step a phlebotomist must do before any blood draw?
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Positively identify the patient using at least two identifiers- What is the standard needle insertion angle for a routine venipuncture?
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15 to 30 degrees- How long should a tourniquet stay applied before it must be released?
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No more than 1 minute- Why shouldn't a tourniquet stay on longer than one minute?
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It can cause hemoconcentration, skewing test results- How far above the venipuncture site should a tourniquet be placed?
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3 to 4 inches (about 7.5 to 10 cm)- Which vein is the first choice for venipuncture?
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The median cubital vein- Why is the basilic vein the last choice for venipuncture?
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It lies close to the brachial artery and median nerve, raising injury risk- Where is the antecubital fossa?
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The shallow depression on the inside (front) of the elbow- What antiseptic is typically used to clean a routine venipuncture site?
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70% isopropyl alcohol- How long should antiseptic air dry before needle insertion?
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About 30 seconds- Why must antiseptic fully dry before puncturing the skin?
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Prevents stinging for the patient and contamination or hemolysis of the sample- As needle gauge number increases, what happens to the needle's diameter?
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The diameter gets smaller- What needle gauge is commonly used for routine adult venipuncture?
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21 gauge- What needle gauge is typically used in a butterfly set for small or fragile veins?
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23 gauge
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