The evacuated tube system (ETS) is the standard equipment used for routine venipuncture. It consists of a needle device, a tube holder, and an air-evacuated tube. You attach the needle device to the tube holder, insert the needle into the vein, and engage the tube.
What are the three components of the evacuated tube system?
Requires three components:
Evacuated sample tube.Double pointed needle.Special plastic adapter.
What is the order of draw for the evacuated tube system?
Standard order of draw: BLOOD CULTURES, royal blue, red, light blue, SST (Gold), green, tan, yellow, pink, pearl, lavender. If a coag tube (light blue) is the only tube or the first tube to be drawn, a 5 mL discard tube must be drawn first. or incubation conditions.
What is the main risk of using an evacuated tube system on a patient with fragile veins?
Venipuncture using a syringe
Syringes typically are used when the patient’s veins are small or fragile and the evacuated tube suction could cause the vein to collapse.
How do evacuated tubes draw blood from a vein?
The sample tube is under vacuum. Once the needle is in the vein, the tube is pressed on to the needle and the blood is drawn automatically into the sample tube by vacuum until the required amount is collected.
Which anticoagulant is used for blood gas determinations?
Heparin is the only anticoagulant used to prepare samples for blood-gas analysis.
What is the order of draw?
The “Order of Draw” is designed to eliminate the possibility of cross contamination that may result in erroneous results. It is based on CLSI Procedures for Collection of Diagnostic Blood Specimens by Venipuncture; Approved Standard Sixth Edition, October 2007.
How do you transfer blood from syringe to tube?
Attach the syringe to a blood transfer device by twisting the needle tip into the hub of the device. Push a vacuum blood collection tube into the holder of the transfer device, and let the tube fill to the appropriate level.
What are the four phlebotomy techniques?
Results. Four different ways of taking blood were observed: cannulation and a syringe (38%), cannula with evacuated tube and adaptor (42%), syringe and needle into vein (14%) and evacuated tube system used conventionally (6%).
Why the order of draw is important?
The order of draw is necessary to obtain correct biochemical results. EDTA contamination was not evident in blood samples collected by trained phlebotomists. The biochemical alterations are statistically and clinically significant.
What is the first tube taken in order of Withdraw?
The draw order for specimen tubes is as follows:
Gold SST (Plain tube w/gel and clot activator additive) Green and Dark Green (Heparin, with and without gel) Lavender (EDTA) Pink – Blood Bank (EDTA)
When would you use an evacuated tube?
The evacuated tube system is the most commonly used means of collecting specimens. This system is preferable to the needle and syringe since it allows the blood to pass directly from the vein to the evacuated tube.
What patient position is preferred when drawing blood if the patient has a history of syncope?
Patients with a history of syncope are recumbent during the draw.
What may result if a phlebotomist collects blood using a wrong evacuated tube?
Using the wrong tube, collecting an insufficient quantity, and blood clotting can lead to delays in care and erroneous lab values.
What are the 3 main veins to draw blood?
3.05.
The most site for venipuncture is the antecubital fossa located in the anterior elbow at the fold. This area houses three veins: the cephalic, median cubital, and basilic veins (Figure 1).
How do you perform an evacuated tube?
Evacuated tube system – push vacutainer tube into holder. Place first and second fingers of left hand against the top of the base of the holder and the thumb against the bottom of the tube. Hold tightly to holder to prevent movement. Do not push holder – may force needle through the vein.
What color are heparin tubes?
Green-top tube: Contains sodium heparin or lithium heparin. Use: Heparinized whole blood or plasma.
