Butterfly Needle & Syringe Blood Draws
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Questions and Answers

What is the main purpose of a butterfly needle?

  • To perform surgical procedures
  • To collect blood samples (correct)
  • To administer intravenous fluids
  • To inject medications intramuscularly

    • Which of the following features distinguishes a butterfly needle from a straight needle?

  • The needle is longer and thicker
  • It has plastic wings on either side (correct)
  • It has a rigid, non-flexible tubing
  • It is used for intramuscular injections

    • What is the typical gauge size of a butterfly needle?

  • 14 or 16 gauge
  • 21 or 23 gauge (correct)
  • 25 or 27 gauge
  • 18 or 20 gauge

    • Which of the following is NOT an advantage of using a butterfly needle?

    <p>Suitable for administering intravenous medications</p> Signup and view all the answers

    What is the typical length of a butterfly needle?

    <p>1/2 to 3/4 inches</p> Signup and view all the answers

    Which feature of the butterfly needle helps to minimize discomfort during blood draws?

    <p>The smaller gauge size of the needle</p> Signup and view all the answers

    What is the purpose of pumping air into the syringe during a blood draw?

    <p>To break the potential seal of the plunger</p> Signup and view all the answers

    What is the liquid portion of whole blood called?

    <p>Plasma</p> Signup and view all the answers

    What happens to the clotting proteins when blood is allowed to clot?

    <p>They are converted to serum</p> Signup and view all the answers

    What is the purpose of adding additives to blood collection tubes?

    <p>To meet the specific testing requirements</p> Signup and view all the answers

    Which of the following is considered 'whole blood'?

    <p>All blood components together</p> Signup and view all the answers

    What is the purpose of a vacutainer during the blood transfer process?

    <p>To cause the blood to flow from the syringe to the vacutainer</p> Signup and view all the answers

    What is the liquid portion of blood called after it has been allowed to clot?

    <p>Serum</p> Signup and view all the answers

    Which of the following is NOT a component of whole blood?

    <p>Lipids</p> Signup and view all the answers

    What is the purpose of the clotting proteins in the body?

    <p>To respond to injuries and halt blood loss</p> Signup and view all the answers

    Which of the following is NOT an additive type found in blood collection tubes?

    <p>Diluent</p> Signup and view all the answers

    What is the primary purpose of the wings on a butterfly needle?

    <p>To prevent the needle from moving and causing vein collapse</p> Signup and view all the answers

    What is the first step when using a butterfly needle for a blood draw?

    <p>Remove the needle, tubing, and luer lock connection from the sterile pouch</p> Signup and view all the answers

    What is the purpose of the transfer device used in a syringe blood draw?

    <p>To connect the syringe to the vacutainer tube</p> Signup and view all the answers

    What is the primary advantage of using a syringe for a blood draw, compared to a vacutainer system?

    <p>Allows for more precise control of the blood volume collected</p> Signup and view all the answers

    When is the safety mechanism on a butterfly needle typically activated?

    <p>While the needle is still in the patient's arm</p> Signup and view all the answers

    What is the purpose of using a syringe for blood gas analysis?

    <p>To maintain the blood chemistry during transport to the lab</p> Signup and view all the answers

    What is the primary difference between using a butterfly needle and a syringe for a blood draw?

    <p>The type of equipment used to collect the blood sample</p> Signup and view all the answers

    What is the primary advantage of using a butterfly needle for a blood draw, compared to a straight needle?

    <p>Provides a more comfortable experience for the patient</p> Signup and view all the answers

    When would a syringe be preferred over a vacutainer system for a blood draw?

    <p>All of the above</p> Signup and view all the answers

    What is the purpose of the 'flash' of blood seen at the connection of the needle and tubing when using a butterfly needle?

    <p>To indicate that the needle is properly inserted into the vein</p> Signup and view all the answers

    What is the purpose of the polymer gel called a 'serum separator' in the blood collection tube?

    <p>To separate the solid and liquid portions of the blood for easier testing</p> Signup and view all the answers

    What is the purpose of the additives in blood collection tubes (vacutainers)?

    <p>To alter blood properties for preservation and specific testing needs</p> Signup and view all the answers

    What is the importance of following the 'Order of Draw' when collecting blood samples?

    <p>To prevent contamination of the blood specimens</p> Signup and view all the answers

    What is the purpose of inverting the blood collection tubes (typically 8-10 times) during and after the procedure?

    <p>To mix the blood with the additives in the tube</p> Signup and view all the answers

    What is the significance of the color-coded notch and sidebar on blood collection tubes?

    <p>It helps in identifying the tube for specific testing needs</p> Signup and view all the answers

    What is the purpose of checking the expiration date on blood collection tubes before use?

    <p>To ensure that the additives in the tube are still effective</p> Signup and view all the answers

    What is the primary purpose of the coagulation cascade when blood leaves the body?

    <p>To initiate the clotting process and stop blood loss</p> Signup and view all the answers

    What is the primary difference between the liquid portion of whole blood and the liquid portion of blood that has been allowed to clot?

    <p>Whole blood is called plasma, while clotted blood is called serum.</p> Signup and view all the answers

    What is the primary purpose of the formed elements (e.g., red blood cells, white blood cells, platelets) in whole blood?

    <p>To transport oxygen, fight infection, and aid in clotting.</p> Signup and view all the answers

    What is the primary purpose of the clotting proteins in the blood?

    <p>To respond to injuries and initiate the clotting process.</p> Signup and view all the answers

    What is the primary purpose of the liquid portion (plasma) in whole blood?

    <p>To maintain the overall volume and viscosity of the blood.</p> Signup and view all the answers

    What is the significance of the term 'whole blood' in the context of blood composition?

    <p>Whole blood refers to the blood that contains all of its formed elements (e.g., red blood cells, white blood cells, platelets).</p> Signup and view all the answers

    What is the primary advantage of using a syringe for blood collection compared to a vacutainer system?

    <p>It allows for precise withdrawal of a specific blood volume.</p> Signup and view all the answers

    What is the purpose of the transfer device used in a syringe blood draw?

    <p>To connect the syringe to the vacutainer tube for blood transfer.</p> Signup and view all the answers

    Why might a syringe be preferred over a vacutainer system for patients with fragile or collapsed veins?

    <p>Both A and B are correct.</p> Signup and view all the answers

    What is the purpose of pumping air into the syringe during a blood draw?

    <p>To break the potential seal of the plunger.</p> Signup and view all the answers

    Which of the following is an advantage of using a syringe for blood gas analysis?

    <p>Specific syringes containing anticoagulants and heparin are used to maintain blood chemistry.</p> Signup and view all the answers

    What is the purpose of inverting the blood collection tubes (typically 8-10 times) during and after the blood draw procedure?

    <p>To mix the blood with the additives in the tubes.</p> Signup and view all the answers

    What is the main difference between plasma and serum?

    <p>Plasma contains clotting factors, while serum does not.</p> Signup and view all the answers

    What is the purpose of the polymer gel called a 'serum separator' in the blood collection tube?

    <p>To separate the solid and liquid portions of the blood for easier testing.</p> Signup and view all the answers

    What is the purpose of inverting the blood collection tubes (typically 8-10 times) during and after the procedure?

    <p>To mix the blood with the additive in the tube.</p> Signup and view all the answers

    What is the primary purpose of the color-coded notch and sidebar on blood collection tubes?

    <p>To indicate the type of additive in the tube.</p> Signup and view all the answers

    What is the purpose of the additives in blood collection tubes (vacutainers)?

    <p>To prevent the blood from clotting.</p> Signup and view all the answers

    What is the purpose of checking the expiration date on blood collection tubes before use?

    <p>To ensure the additive in the tube is still effective.</p> Signup and view all the answers

    What is the main purpose of a butterfly needle?

    <p>To minimize discomfort during the blood draw.</p> Signup and view all the answers

    What is the purpose of the 'flash' of blood seen at the connection of the needle and tubing when using a butterfly needle?

    <p>To indicate the needle has successfully entered the vein.</p> Signup and view all the answers

    What is the primary advantage of using a syringe for a blood draw, compared to a vacutainer system?

    <p>Allows for greater control over the blood flow.</p> Signup and view all the answers

    What is the purpose of the clotting proteins in the body?

    <p>To prevent excessive bleeding during injury.</p> Signup and view all the answers

    What is the primary purpose of using a syringe and transfer device instead of a vacutainer system for blood collection?

    <p>To enable controlled blood withdrawal</p> Signup and view all the answers

    Which of the following is NOT a common reason for preferring a butterfly needle over a straight needle for blood draws?

    <p>Reduced risk of needlestick injuries for the healthcare professional</p> Signup and view all the answers

    What is the purpose of the luer lock connection on a butterfly needle?

    <p>To facilitate the attachment of the needle to the syringe or tubing</p> Signup and view all the answers

    What is the recommended action when a flash of blood is observed at the connection of the needle and tubing during a butterfly needle blood draw?

    <p>Attach the vacutainer or syringe to the tubing to begin blood collection</p> Signup and view all the answers

    Which of the following statements is TRUE regarding the safety mechanism on a butterfly needle?

    <p>It is typically a sliding sheath that covers the exposed needle tip</p> Signup and view all the answers

    What is the primary purpose of inverting the blood collection tubes (typically 8-10 times) during and after the blood draw procedure?

    <p>To ensure proper mixing of the blood sample with the tube additives</p> Signup and view all the answers

    Which of the following is NOT a typical additive found in blood collection tubes?

    <p>Saline solution</p> Signup and view all the answers

    What is the primary function of the serum separator (polymer gel) found in some blood collection tubes?

    <p>To separate the serum from the blood cells after centrifugation</p> Signup and view all the answers

    Which of the following statements is TRUE regarding the color-coded notch and sidebar on blood collection tubes?

    <p>They indicate the type of additive present in the tube</p> Signup and view all the answers

    What is the primary purpose of the additives in blood collection tubes?

    <p>To preserve the integrity of the blood sample for specific diagnostic tests</p> Signup and view all the answers

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