1. Phlebotomy

Phlebotomy

  • Definition: Surgical opening/puncture of a vein to withdraw blood or introduce a fluid.

Importance of Phlebotomists

  • Critical for patient diagnosis and care.

  • Direct patient contact represents lab and healthcare team.

Patient Interaction

  • Must be:

    • Caring: Proper name usage, comfort.

    • Competent: Skilled in procedures.

    • Professional: Appropriate appearance and behavior.

Phlebotomy Tasks

  • Collect correct specimens, follow standard precautions, and ensure proper handling.

  • Errors primarily occur during pre-analytical phase (60%).

Pre-Analytical Variables

  • Factors affecting blood composition:

    • Day-to-day/hourly fluctuations

    • Age, Alcohol consumption, Altitude, Dehydration, Diurnal variation, Exercise, Fasting, Sex, Pregnancy, Obesity, Smoking, Stress.

Specimen Interference

  • Interference types:

    • Hemolysis: RBC destruction affecting tests (e.g., AST, CBC).

    • Icterus: Bilirubin elevation affects color analysis.

    • Lipemia: Excess fats causing milky serum.

Error Phases

  • Pre-Analytical: Identification errors, contamination.

  • Analytical: Quality control, instrument malfunction.

  • Post-Analytical: Result interpretation errors.

Barriers to Communication

  • Patient sleepiness, unconsciousness, presence of physicians or visitors, language barriers, missing wristbands.

Site Selection Issues

  • Avoid:

    • Occluded/sclerosed veins, hematomas, edematous tissue, areas with burns/scars.

    • Mastectomy-side veins, IV sites.

Complications in Blood Collection

  • Syncope: Fainting risk during venipuncture.

  • Seizures, nausea, pain management, accidental arterial puncture, nerve damage, short draws, prolonged bleeding.

Special Considerations

  • Hemoconcentration due to prolonged tourniquet use.

  • Proper communication with nursing staff is vital for patient safety.