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Med158 chapters 7&8
| Question | Answer |
|---|---|
| Skin changes make veins in the elderly easier to see; however, sagging skin combined with loss of muscle tone can cause what? | Harder to anchor veins and keep from rolling |
| The tests performed in the following department are collected in a tube with a light blue stopper: | Coagulation |
| Heparin prevents blood from clotting by | Inhibiting thrombin |
| To avoid inadvertently puncturing an artery, never select a vein that overlies or is close to where you feel a | Pulse |
| What is a clear, plastic, disposable cylinder with a small threaded opening at one end where the needle is screwed into it and a large opening at the other end where the collection tube is placed? | Tube/Needle holder |
| What type of needles are used in venipuncture | winged infusion (butterfly), multisample, Hypodermic |
| The solution normally used to clean the site before routine venipuncture is | 70% isopropyl alcohol |
| Never leave a tourniquet on for more than | 1 minute |
| The most common anticoagulants are? | Heparin, oxalates, and EDTA |
| What age group of pediatric patients that capillary blood collection is normally recommended | Newborns and infants up to 12 months old |
| According to OSHA, how should the needle and the tube holder be disposed of? | In the sharps container as a single unit |
| Which is the best additive for collecting an ethanol specimen? | Sodium fluoride |
| You arrive to draw a "fasting specimen." The patient is just finishing a big breakfast. What do you do? | Check with the patient's nurse first; if the specimen is collected, write "nonfasting" on the laboratory slip |
| What is the most critical error a phlebotomist can make? | Misidentifying a patient speimen |
| What may happen if you mix tubes too vigorously? | Hemolysis |
| Glass particles present in serum separator tubes | Accelerate coagulation |
| Which additive is usually present in a tube with a lavender stopper? | EDTA |
| What is the most important factor in choosing which gauge needle to use for venipuncture? | Size and condition of the patient’s vein |
| Which government agency regulates the quality of gloves worn when performing phlebotomy procedures? | FDA |
| How can you tell that you are in a vein when using a syringe or a butterfly needle? | You should see blood appear in the hub of the needle |
| What is the purpose of an antiglycolytic agent? | to preserve glucose |
| Types of antiseptic | Benzalkonium chloride, Povidone-iodine, Isopropanol alcohol |
| What is a Bar code? | A series of black strips and white spaces of varying widths that corresponds to letters and numbers |
| The best way to collect specimens from a dorsal hand vein is | To use a butterfly and small, pediatric ETS tubes |
| Which needle gauge has the largest lumen | The lower the gauge number, the larger the needle’s lumen (inside diameter) |
| What is the form on which lab test are ordered called? | Requisition form |
| What would be the system of choice to identify laboratory specimens form an unconscious, unidentified woman in the emergency room? | Use a three-part identification band and labels |
| A tube with a green stopper normally contains | Heparin |
| What is the most common citrate additive? | Sodium citrate |
| It is important to allow additive tubes to fill with blood until when? | The normal vacuum is exhausted |