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Home/ Questions/Q 5413
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N.K. Sharma
N.K. Sharma
Asked: January 29, 20242024-01-29T18:09:17+05:30 2024-01-29T18:09:17+05:30In: Anthropology

Describe the procedure for the collection of human blood sample.

Describe the process used to obtain a sample of human blood.

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    1. Himanshu Kulshreshtha Elite Author
      2024-01-29T18:10:08+05:30Added an answer on January 29, 2024 at 6:10 pm

      Procedure for Collection of Human Blood Sample

      Collecting a blood sample is a routine medical procedure for various diagnostic tests and medical assessments. Here is a general procedure for the collection of a venous blood sample:

      1. Preparation:

      • Gather necessary materials, including sterile needles, collection tubes, tourniquet, alcohol swabs, and adhesive bandages.
      • Ensure the collection site is well-lit and clean.

      2. Identify the Patient:

      • Verify the patient's identity using at least two unique identifiers (e.g., name and date of birth) to avoid errors.

      3. Informed Consent:

      • Explain the blood collection procedure to the patient, addressing any concerns, and obtain informed consent.

      4. Positioning:

      • Seat the patient comfortably and position the arm so that the veins are easily accessible. The choice of the arm depends on the patient's preference and the healthcare provider's assessment.

      5. Apply Tourniquet:

      • Use a tourniquet above the selected venipuncture site to make the veins more visible and easier to access.

      6. Select Venipuncture Site:

      • Identify a suitable vein, often in the antecubital fossa (inner elbow area), for venipuncture. Other sites, such as the back of the hand or wrist, may be used if necessary.

      7. Disinfect the Area:

      • Clean the selected venipuncture site with an alcohol swab and allow it to dry. This prevents contamination of the blood sample.

      8. Needle Insertion:

      • Insert a sterile needle into the vein at a slight angle. Ensure that the bevel of the needle is facing upward.

      9. Blood Collection:

      • Attach the collection tube to the needle and allow the blood to flow into the tube. The tourniquet is usually released once blood flow is established.

      10. Remove Needle:

      • Once the required volume of blood is collected, remove the needle carefully, applying gentle pressure to the puncture site with a cotton ball or gauze.

      11. Bandaging:

      • Apply a bandage or sterile dressing to the puncture site to stop bleeding and prevent infection.

      12. Labeling:

      • Label the blood collection tubes with patient information, including name, date of birth, and collection time.

      13. Mix Tubes:

      • Gently invert or rotate blood collection tubes containing additives to ensure proper mixing of the blood with anticoagulants or other substances.

      14. Transport to Lab:

      • Transport the labeled blood samples to the laboratory promptly, following proper storage conditions and handling protocols.

      15. Dispose of Sharps:

      • Dispose of used needles and other sharps in designated sharps containers following safety regulations.

      Accurate blood collection is crucial for obtaining reliable diagnostic results. Healthcare professionals must follow proper procedures to ensure patient safety, minimize discomfort, and maintain the integrity of the blood samples collected for testing.

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