11 Questions
Why is it crucial to follow the specific order of draw when collecting multiple blood samples?
To prevent cross-contamination of samples
What is the main reason for following a specific order of draw when collecting multiple blood samples?
To prevent contamination of the samples with additives from previous tubes
What is the consequence of not following the specific order of draw when collecting multiple blood samples?
The test results may be inaccurate or unreliable
What is the primary goal of following the specific order of draw when collecting multiple blood samples?
To maintain the integrity of the blood samples
Why is it important to follow the recommended order of draw when collecting multiple blood samples?
To prevent additives from interfering with test results
What should be reviewed to account for factors that might affect blood clotting during venipuncture?
Medical history
At what angle should the needle be inserted into the vein during venipuncture?
15-30°
What should be done immediately after removing the needle to prevent bleeding?
Apply gentle pressure with gauze
Which vein is commonly chosen for venipuncture?
Median cubital vein
What is a potential complication of venipuncture involving bleeding under the skin?
Hematoma
What is the first step in the venipuncture procedure?
Apply the tourniquet
Study Notes
Blood Sample Collection
- The specific order of draw is crucial when collecting multiple blood samples to avoid cross-contamination of additives between tubes and ensure accurate test results.
- The order of draw helps prevent carryover of additives from one tube to another, which can affect test outcomes.
- Correct ordering also ensures that the blood samples are not compromised, maintaining the integrity of the testing process.
Preparation for Venipuncture
- Verify patient's identification and test request
- Review medical history for bleeding disorders or medications affecting blood clotting
- Wash hands thoroughly and wear gloves
- Choose a suitable vein for venipuncture (median cubital or cephalic vein)
Venipuncture Equipment
- Needles (21-23 gauge)
- Syringes or vacuum tubes
- Tourniquet
- Gauze
- Antiseptic wipe
- Bandage or cotton ball
Venipuncture Procedure
- Restrict blood flow with a tourniquet 3-4 inches above the venipuncture site
- Clean the skin with an antiseptic wipe
- Insert needle at a 15-30° angle, bevel up, into the vein
- Collect blood slowly by pulling back the plunger or using a vacuum tube
- Remove the needle and apply gentle pressure to the site with a gauze or cotton ball
- Release the tourniquet after the needle is removed
- Label the sample with the patient's identification and test request
Post-Procedure Care
- Apply a bandage to the site
- Monitor the patient for bleeding, discomfort, or other complications
- Dispose of used needles and equipment properly
Venipuncture Complications
- Hematoma (bleeding under the skin)
- Nerve damage
- Infection
- Fainting (vasovagal response)
- Allergic reactions to equipment or cleaning agents
Learn why following a specific order of draw is crucial when collecting multiple blood samples. Understand the importance of this process in phlebotomy. Get ready to test your knowledge!
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