Phlebotomy Clinical Skills — Core Procedures

The standard method for drawing venous blood using a multi-sample needle, holder, and vacuum tubes. This is the core procedure your NHA CPT eligibility documentation is built on — at least 30 supervised venipunctures are required before you can sit for the exam.

The CLSI-defined sequence for filling multiple tubes during one draw, designed to prevent additive carryover between tubes from contaminating results. This is the single most frequently tested phlebotomy procedure.

Collecting a small blood sample via a lancet puncture, used for point-of-care testing, pediatric patients, and patients with difficult venous access. At least 10 supervised capillary punctures are required for NHA CPT eligibility.

Proper tourniquet technique helps locate a vein by restricting venous (not arterial) return, while minimizing hemolysis and inaccurate lab values from prolonged or excessive application.

Correctly identifying the right patient and obtaining informed consent before every collection — a misidentified specimen is one of the most serious errors a phlebotomist can make, since it can lead to a wrong diagnosis or treatment for someone else.

Cleaning the venipuncture or puncture site to minimize contamination risk — standard for routine draws, and significantly more rigorous for blood cultures.

Collecting blood for culture to detect bloodstream infections requires stricter sterile technique than a routine draw, since even small amounts of skin contaminant bacteria can cause a false-positive result.

Correctly labeling, transporting, and handling specimens after collection — a mislabeled or mishandled specimen can be as harmful as a misidentified patient, since it can misattribute one patient's results to another.

Standard precautions — hand hygiene and personal protective equipment — apply to every single patient interaction and specimen handled, regardless of known infection status.

Blood collection technique adjusts meaningfully for young children and older adults — smaller or more fragile veins, different communication needs, and age-specific safety concerns.