Readers ask: How To Draw Blood From A Line?


Back-flushing reduces the risk of introducing pathogens by collecting the discard sample and back flushing with a syringe if no blood is being collected into vacuum tubes. WARNING: Patients may experience a warm sensation in their extremity during line fling.
Assess all IVs that are distal to a multilumen or PICC catheter for sampling. When drawing blood samples from central venous lines, a minimum discard sample of 5 ml is required because infusions from distal peripheral lines can dilute or contaminate a lab sample. Turn the stopcock so that the white prong points toward the patient’s catheter.

Can nurses draw blood from an arterial line?

The policy authorizing arterial line sampling may perform arterial line sampling at the physician’s request or in accordance with the specific ICU protocol. (RT and/or RN are capable of drawing blood gas from an arterial line.)

How do you get a blood sample from a central line?

Here’s how to do it:

  1. Pull to aspirate 6 ml of blood into the syringe using the same syringe.
  2. Repeat the aspiration and reinfusion at least three times.
  3. Remove and discard the used syringe and attach a new syringe to draw the sample for the lab.

Can you draw blood from an IV line?

A. Except for patients on thrombolytics (to reduce the number of sticks) or in an emergency, blood samples should not be drawn during IV starts or from established IV catheters.

How do you draw blood out of a PICC line?

… Withdraw a maximum of 3 mL blood/normal saline mixture (the internal lumen of a 20-gauge PICC catheter is 0.3 mL). Discard syringe with blood into puncture-proof container… Aspirate first to determine PICC patency, then flush with 5 -10 mL normal saline before drawing any blood.

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Can you flush an art line?

If a line does not flush, do not force it because the patient may have a thrombosis, and dislodging it can be fatal. Always notify the physician if you have any concerns about the arterial line. Change the dressing and record the date and time.

How much blood do you waste when drawing from a port?

8. Remove 5ml (or the appropriate amount) of blood with an empty 10ml syringe and discard.

Can you take blood from a central line?

A central line (or central venous catheter) is similar to an intravenous (IV) line, but it is much longer and extends all the way up to a vein near or inside the heart, allowing the patient to receive medicine, fluids, blood, or nutrition, as well as draw blood.

Why do PICC lines stop drawing blood?

Excessive force can cause a flexible PICC to collapse and obstruct blood flow. On a peripheral vein, you could be pulling the vein wall over the catheter lumen, as shown in this drawing. If slow and gentle doesn’t work, try a smaller syringe.

Why is blood waste when drawing from a central line?

An intravenous (IV) catheter is frequently inserted in patients undergoing testing in a hospital setting; before a blood sample is drawn from an IV catheter, a “waste” blood sample is drawn to remove the saline or heparin that was in the catheter.

What are the 3 main veins to draw blood?

The antecubital area of the arm, which contains the three vessels primarily used by phlebotomists to obtain venous blood specimens: the median cubital, cephalic, and basilic veins, is usually the first choice for routine venipuncture.

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Why can’t you pull blood from an IV?

Blood drawn from a vein with an intravenous (IV) line may be diluted by the IV fluid, affecting the accuracy of the blood test results. If possible, blood should not be drawn from an arm with an IV.

Can I draw blood from a single lumen PICC?

A single lumen PICC has one tubing and one cap on the end, whereas a double lumen PICC has two tubings and two caps. A PICC is used to administer medications, fluids, and IV nutrition, and it can also be used to draw blood if it is large enough.

Do you flush a PICC line before drawing blood?

When not in use or after any infusion or bolus injection, the PICC should be flushed once weekly with 10mls of 0.9% Sodium Chloride to maintain patency; there is no need to withdraw blood into the syringe prior to a routine saline flush (RCN 2010).

Can a phlebotomist draw from a PICC line?

You’ll need an alcohol pad or appropriate cleansing agent for the port, a tube holder, a needleless vacuum collection device, appropriate blood tubes, including a waste tube, patient labels, and saline flushes for each port if drawing blood from a peripherally inserted central catheter (PICC) line or central line.

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