What is the term for a collection of blood under the skin at the site of a venipuncture?
In venous blood sampling, a needle is inserted into a vein to collect a sample of blood for testing. Show Peripheral veins, typically the antecubital veins, are the usual sites for venous blood sampling.
Absolute contraindications
Relative contraindications
In the above situations, use another site (eg, the opposite arm) for venipuncture. Coagulopathy is not a contraindication, but sites must be compressed for a longer time after venipuncture. Complications are uncommon and include
Optional equipment includes
Do a preliminary inspection (nonsterile) to identify a suitable vein: Apply a tourniquet, have the patient make a fist, and palpate using your index finger to locate a large-diameter vein that is nonmobile and has good
turgor. To help distend and locate veins, tap a potential site with your fingertips. It may help to allow the arm to hang down, increasing venous pressure. Use a vein-finder device if a suitable vein is not readily seen or palpated. After identifying a suitable cannulation site, remove the tourniquet. Apply anesthetic if it is being used and allow adequate time for it
to take effect (eg, 1 to 2 minutes for gas injector, 30 minutes for topical). Cleanse the skin site with antiseptic solution, beginning at the needle-insertion site and making several outwardly expanding circles. Wait for the antiseptic solution to dry completely. If applying povidone-iodine, wipe it off with alcohol and allow the alcohol to dry. If blood is
being obtained for blood cultures, vigorously cleanse the site with alcohol for 30 seconds, allow the alcohol to dry, and then swab in outwardly expanding, overlapping circles using chlorhexidine or povidone-iodine. Wait for the antiseptic effect to occur (1 minute for chlorhexidine or 1.5 to 2 minutes for iodine). Wipe off povidone-iodine with alcohol and allow the alcohol to dry. For children, swab the site 3 times using only alcohol. After this point, do not
touch the skin site with any nonsterile item. Try to access the vein efficiently and collect the blood sample within 30 seconds after tourniquet placement. Do not leave the tourniquet on for > 1 minute.
* When multiple blood tests are to be done, blood should be allocated to the collection tubes in a proper sequence; first cultures, then tubes with anticoagulant, and then others. Note that the rubber tops of blood-culture bottles must be properly disinfected prior to introducing the blood sample (eg, by scrubbing each top with separate 70% alcohol wipes for 30 seconds and allowing it to air-dry).
Click here for Patient Education What is the term for a collection of blood under the skin at the site of a venipuncture quizlet?Hematoma. When should the tourniquet be removed? While the first tube is filling. What is the term for a collection of blood under the skin at the site of a venipuncture? Hematoma.
What is a collection of blood called?Venipuncture is the collection of blood from a vein. It is most often done for laboratory testing. Blood is drawn from a vein (venipuncture), usually from the inside of the elbow or the back of the hand. A needle is inserted into the vein, and the blood is collected in an air-tight vial or a syringe.
What are the collection sites for venipuncture?VENIPUNCTURE SITE SELECTION:
Although the larger and fuller median cubital and cephalic veins of the arm are used most frequently, the basilic vein on the dorsum of the arm or dorsal hand veins are also acceptable for venipuncture. Foot veins are a last resort because of the higher probability of complications.
What is hematoma in venipuncture?A hematoma is a swollen or raised area at the venipuncture site resulting from the leakage of blood into the tissues.
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