Patient Identification, Requisition Interpretation, and Pre-Procedure Communication

Objective. Students will perform a two-identifier patient verification, interpret a laboratory requisition, and explain the procedure to a simulated patient using plain language.

Why Patient Identification Comes First

Every phlebotomy procedure begins before a needle is uncapped. The single most preventable error in laboratory medicine is drawing blood from the wrong patient or labeling a tube with the wrong name. Wrong-patient draws can lead to misdiagnosis, incorrect transfusions, or delayed treatment — any of which can seriously harm or kill a patient. The two-identifier check is your first and most important line of defense.

A two-identifier check means you confirm at least two distinct pieces of patient information before you touch the patient for any clinical purpose. Acceptable identifiers typically include the patient's full name and date of birth, or the patient's full name and a medical record number (MRN). Room number and bed number are never acceptable identifiers on their own because they change.

How to Perform the Two-Identifier Check

Follow this sequence every single time, without shortcuts:

1. Introduce yourself and state your purpose. Say your name, your role, and what you are there to do. Example: "Good morning, my name is Alex and I'm a phlebotomy technician. I'm here to collect a blood sample ordered by your doctor."

2. Ask the patient to state their information — do not read it to them first. Say: "Before I begin, can you please tell me your full name and date of birth?" An alert patient should give you both.

3. Compare what the patient says to the wristband. Visually scan the wristband for name and date of birth or MRN. Both identifiers must match the requisition exactly.

4. If anything does not match, stop. Do not proceed. Politely tell the patient you need to verify their information, step away, and notify your supervisor or the nurse. Document the discrepancy according to facility policy.

For patients who cannot state their own name (unconscious, confused, pediatric), a responsible caregiver or nurse must confirm identifiers at the bedside while you compare to the wristband.

Reading a Laboratory Requisition

A laboratory requisition (also called a test order or request form) is the written or electronic authorization that tells you what tests to collect and how to collect them. You must be able to read every field correctly before you pick up a tube.

Key fields to locate on every requisition:

Patient demographics: Full name, date of birth, MRN. These must match the wristband.
Ordering provider: The licensed clinician (physician, nurse practitioner, etc.) who authorized the draw.
Test name(s) and codes: The specific assays ordered (e.g., Complete Blood Count, Basic Metabolic Panel, Prothrombin Time).
Specimen tube(s) required: Each test corresponds to a specific tube type identified by stopper color (e.g., lavender/EDTA for CBC, light blue/sodium citrate for coagulation studies, red or gold/SST for chemistry). Always consult your facility's tube-type reference if unsure.
Special instructions: Fasting status (commonly required for lipid panels and fasting glucose), timed draws (e.g., peak and trough drug levels, glucose tolerance), patient position requirements, or temperature handling.
Priority/status: Routine, STAT (immediate, typically within minutes to one hour), or timed. STAT orders must be recognized and acted on without delay.
Collection date and time: Important for timed specimens and legal documentation.

If a requisition is incomplete, illegible, or contradictory, do not guess. Contact the ordering provider or the laboratory to clarify before collecting.

Pre-Procedure Communication

Explaining the procedure to the patient in plain language reduces anxiety, promotes cooperation, and is an ethical and professional obligation. A cooperative patient is also safer — sudden movement during venipuncture increases the risk of hematoma and needlestick injury.

Elements of an effective 60-second explanation:

1. What will happen: "I'm going to place a small needle into a vein in your arm to collect a blood sample. It will take about one to two minutes."

2. Expected sensation: "You'll feel a brief sting or pinch when the needle goes in, then pressure while I collect the blood."

3. How to signal distress: "If at any point you feel dizzy, light-headed, or need me to stop, just raise your other hand or tell me and I will stop right away."

4. Permission to proceed: "Do you have any questions before I start?"

Avoid medical jargon. Do not say "venipuncture" to a patient who looks confused. Say "blood draw" or "blood collection." If a patient declines the procedure, respect that decision, do not proceed, and document and report the refusal according to your facility's policy.

Safety Points

Never skip or abbreviate the two-identifier check, regardless of time pressure.
A mismatch between the wristband and the requisition must halt the procedure; never assume it is a clerical error you can overlook.
STAT orders require prompt recognition — missing a STAT designation could delay critical care.
Informed communication reduces patient movement, which directly reduces your needlestick risk.
Document everything: identifiers confirmed, time of draw, and any incidents or refusals.

Key terms9

Two-identifier checkA patient safety protocol requiring confirmation of at least two distinct pieces of patient information — such as full name and date of birth or medical record number — before any clinical procedure begins.

Medical record number (MRN)A unique number assigned to a patient by a healthcare facility, used as one acceptable patient identifier during the verification process.

Laboratory requisitionA written or electronic order from a licensed provider that authorizes specimen collection and specifies the tests to be performed, the tubes required, and any special instructions.

STATA priority designation on a laboratory order meaning the specimen must be collected and processed immediately; derived from the Latin 'statim,' meaning at once.

Fasting specimenA blood sample that must be collected after the patient has abstained from food and caloric beverages for a specified period, commonly required for lipid panels and fasting glucose tests.

Timed drawA blood collection that must occur at a specific scheduled time, such as a peak or trough drug level or a glucose tolerance test, where timing directly affects result accuracy.

Tube typeThe specific blood collection tube designated for a test, identified by stopper color and additive (e.g., lavender top with EDTA for hematology, light blue top with sodium citrate for coagulation).

Informed communicationThe practice of explaining a procedure to a patient in plain language, including what will happen, expected sensations, and how the patient can signal distress or withdraw consent.

Patient refusalA patient's right to decline a blood draw; the phlebotomist must stop, not argue, document the refusal, and report it to the appropriate clinical staff according to facility policy.

In class: Role-play patient identification using printed simulated wristbands and requisitions; practice stating the two-identifier script, resolving one intentional mismatch, and escalating correctly. · Decode three sample requisitions of varying complexity, identifying test names, tube requirements, special instructions (fasting, timed draws), and priority status. · Deliver a 60-second pre-procedure explanation to a peer acting as a reluctant patient, addressing what will happen, expected sensation, and how to signal distress; receive structured peer feedback.
Materials: Simulated patient wristbands, printed laboratory requisitions, requisition interpretation guide, script checklist, peer feedback form
Check: Student correctly executes two-identifier check with zero errors, interprets all key fields on two of three requisitions without prompting, and earns a passing rating (3 of 4 communication criteria) on the peer feedback form.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.