Patient Preparation and Care

Ask the patient to state and spell their full name and give their date of birth. Asking are you Mr. Garcia invites a confused or hard-of-hearing patient to agree with a wrong name.

The information the patient gives must match the wristband and the requisition or label exactly, including middle initial and spelling. Any discrepancy stops the draw until it is resolved by the nurse or provider.

For inpatients the identification band has to be attached to the patient. A band lying on the nightstand or taped to the bed rail cannot be used to identify anyone.

For a sleeping, sedated, cognitively impaired, or pediatric patient, verify identity with a nurse, caregiver, or parent who states the name and date of birth, and document who provided the verification.

Trauma patients without known identity are given a temporary identification number that stays with them through admission; the specimen is labeled with that number and it is never replaced retroactively without a documented merge procedure.

Identify yourself, state your department, and say why you are there before asking for identifiers; this satisfies both professional courtesy and the patient's right to know who is collecting their blood.

Fasting means no food, no caloric beverages, no gum, and no smoking for the specified interval, usually 8 to 12 hours, while plain water is allowed and encouraged for hydration.

Fasting blood glucose typically requires 8 hours; a traditional lipid panel requires 9 to 12 hours, though many current protocols accept nonfasting lipids. Nonfasting collection produces lipemic serum that interferes with multiple assays.

Draw a fasting baseline first, give the measured glucose load to be finished within about five minutes, then draw at the exact intervals ordered. The patient stays on site, drinks only water, and does not eat, smoke, chew gum, or exercise during the test.

Basal state samples are collected in the early morning after overnight rest and fasting. Analytes with strong diurnal variation, such as cortisol and serum iron, must be drawn at the time the provider ordered because the reference range depends on it.

A trough is drawn immediately before the next dose and a peak at the interval specified for the drug and route. Record the exact collection time and the time of the last dose, because the level cannot be interpreted without both.

Ask the patient when they last ate, drank anything besides water, or took the drug in question, and document any deviation on the requisition so the laboratory can flag the result appropriately.

Informed consent follows a full explanation of the procedure and its risks, expressed consent is stated verbally or in writing, and implied consent is inferred from the patient's cooperative actions such as extending an arm.

A competent patient may refuse at any point, even after the tourniquet is on. Do not proceed; notify the nurse or ordering provider, document the refusal and the time, and never attempt a draw over an objection, which can constitute battery.

Consent comes from a parent, legal guardian, or authorized representative, while an older child is still asked for assent and given an age-appropriate explanation.

Ask about latex allergy, adhesive sensitivity, any history of fainting during blood draws, a preferred arm, and any restrictions such as a mastectomy, fistula, or IV, and act on the answers.

Tell the patient what you will do, roughly how long it will take, and how many tubes you need. Say that they will feel a quick stick rather than promising no pain.

Use the facility's interpreter service rather than a family member for anything beyond simple greeting, and use written or demonstrated instructions for patients with hearing loss so that identification and consent remain valid.

Seat the patient in a chair with arm supports or have them lie down. Do not collect from a patient perched on a stool or standing, and never let a patient with a fainting history sit upright without support.

If the patient reports previous syncope during blood draws, recline them before you begin, apply a cold compress to the back of the neck if they feel warm, and keep them under observation for 15 to 30 minutes afterward.

Use a calm, unhurried voice, give the patient something to focus on such as slow breathing or looking away, and avoid displaying the needle. Rushing a frightened patient increases movement during the stick.

Explain in age-appropriate terms, never say it will not hurt, allow the caregiver to hold and comfort the child, and use a winged set with the smallest adequate volume. Immobilization requires a second trained person, not the phlebotomist alone.

Older adults may have thin skin, loose tissue, and fragile vessels, so use a smaller gauge or winged set, apply the tourniquet loosely or use blood pressure cuff pressure below diastolic, anchor firmly, and hold pressure longer afterward.

After two failed attempts, or whenever the patient is in distress, stop and hand off to another collector or the supervisor. Persisting causes tissue injury, distrust, and often still no specimen.

Pallor, sweating, dizziness, and nausea signal an imminent faint. Remove the tourniquet and needle at once, lower the head between the knees or lay the patient flat, apply a cold compress, and never leave them alone. Ammonia inhalants are not recommended because they can trigger bronchospasm.

Swelling and rapid bluish discoloration at the site mean blood is escaping into the tissue. Discontinue the draw, remove the needle, and hold firm pressure for at least two minutes, or five or more for anticoagulated patients, then apply ice for the first 24 hours.

Sudden shooting, electric, or burning pain, or numbness and tingling radiating down the arm, indicates nerve contact. Withdraw the needle immediately, do not reposition it, report the event, and document it; symptoms that persist require provider evaluation.

Bright red blood that pulses or fills the tube rapidly on its own suggests an artery. Remove the needle and hold continuous firm pressure for at least five minutes with the arm elevated, notify the nurse, and mark the specimen as possible arterial sample.

Small red spots below the tourniquet suggest a platelet or capillary defect, and bleeding that continues past five minutes should be reported to nursing. Do not release the patient until bleeding has stopped.

Repeated collection can itself cause anemia, which is a particular risk in neonates and critically ill patients; institutional limits cap the volume drawn per collection and per period based on patient weight.