5.3 Labeling Requirements and Rejection Criteria

5.3 Labeling Requirements and Rejection Criteria

Quick Answer: Specimens must be labeled at collection with at least two patient identifiers that match the order. Unlabeled or mislabeled samples are rejected and recollected. Do not re-label from memory or from a nearby requisition. Opened or expired tubes also fail acceptance. When identity is uncertain, patient safety beats convenience every time.

Wrong-blood-in-tube (WBIT) errors drive transfusion disasters, incorrect chemotherapy decisions, and false diagnoses. The MLA is a control point: accessioning and processing staff must enforce labeling rules without exceptions based on “the nurse said it’s fine.”

---

Minimum Labeling Requirements

Facility policies align with accreditation and CLSI-oriented practice. Expect labels to include:

Blood bank specimens often require stricter rules (e.g., unique BB armband number, witnessed draw). Follow the blood bank SOP exactly—general chemistry flexibility does not apply.

Labels should be placed so barcodes scan, tubes still fit centrifuges and analyzers, and information is not written only on the bag or requisition. A requisition is not a label for an unlabeled tube.

---

Unlabeled Specimens

An unlabeled tube, cup, or bottle has no acceptable identity. Standard action:

1. Do not process, centrifuge for testing, or aliquot into labeled secondary tubes as a workaround.
2. Reject per SOP.
3. Notify the collecting location for recollection.
4. Document and dispose of biohazard material according to policy (some labs retain briefly under quarantine for risk management—follow written procedure, not verbal shortcuts).

Rare exceptions (e.g., irreplaceable CSF drawn in OR) require supervisor/pathologist management with documented limited testing and clinical acknowledgment—not MLA freehand labeling.

---

Mislabeled Specimens and Mismatched Requisitions

Mislabeled means the label identity does not match the patient who was actually drawn, or two conflicting identities appear (tube vs requisition vs LIS order).

Examples:

• Tube says Patient A; order/requisition says Patient B.
• Name matches but MRN/DOB do not.
• Two patient labels on one bag with one tube.
• Handwritten name over a different printed label.

Correct response: treat as identity failure → reject and recollect. Staff must not:

• Call the floor and re-label based on “we’re sure.”
• Cross out one name and write another.
• Assume the LIS order is right and the tube is wrong (or vice versa) without a formal process.

Problem resolution may include occurrence reporting, QAPI review, and education of collectors—but the specimen itself remains unsafe for resulting.

---

Incomplete Labels

Incomplete is not always the same as unlabeled. Policies distinguish:

When in doubt, escalate to lead/supervisor rather than inventing a fix. The exam emphasis is: incomplete critical identity elements = do not guess.

---

Integrity Failures Beyond Writing: Opened and Expired Tubes

Opened tubes / missing stoppers

An opened primary tube may be:

• Contaminated
• Evaporated (concentrated analytes)
• Exposed to air (blood gas and some analyte changes)
• Tampered with in chain-of-custody contexts

Reject opened diagnostic tubes when integrity cannot be assured. Do not recap and pretend the closed system was maintained.

Expired tubes

Evacuated tubes past expiration can have:

• Weak vacuum → short draws / QNS
• Degraded additive → microclots, wrong ratios, poor gel performance

Do not use expired tubes for collection; if received, follow reject/recollect rules. Inventory FIFO (first-in, first-out) prevents this upstream.

Other integrity rejects

• Cracked tubes, leaking specimens
• Gross external contamination that risks staff safety and label readability
• Specimens transported in food containers or unapproved vessels

---

Rejection Versus Problem Resolution

Not every paperwork glitch requires destroying a hard-to-replace sample, but identity uncertainty always prioritizes rejection.

Problem resolution means using written procedures, dual verification, and audit trails—not informal hallway agreements.

---

Never Re-Label Without a Policy-Approved Process

Re-labeling is a high-risk control. Acceptable pathways (examples—your SOP governs):

1. Collector still present with the patient and original labeled tube; identity re-verified with wristband; new label applied under observation; event documented.
2. Formal laboratory variance approved by supervisory authority for irreplaceable specimens with clinical team acknowledgment.
3. Aliquot labeling from a correctly labeled primary after accessioning—secondary containers inherit identity through controlled LIS labels, not sticky notes.

Unacceptable:

• “The only patient on the unit with that test.”
• Matching by bed number alone.
• Copying a name from an unattached requisition found in the bag.
• Using a leftover label from a printer batch.

If you did not verify identity at collection, you cannot safely create identity later.

---

Patient Safety Priority: How to Talk About Rejects

Clinical partners may pressure processing staff to “just run it.” Use a short, firm script:

“I can’t result this specimen because the identity doesn’t meet lab policy. We’ll need a recollect with two identifiers on the tube. I’ll document the rejection and help get the correct labels sent.”

Escalation path: MLA → lead/supervisor → laboratory medical director pathway for disputes. Never let hierarchy intimidation override labeling policy; accreditation and patient harm land on the laboratory that resulted the wrong patient’s sample.

---

Mini Checklist at Receipt

1. Two identifiers present and legible on the specimen?
2. Identifiers match order/requisition/LIS?
3. Collection date/time/collector present when required?
4. Tube closed, unexpired, correct type for tests?
5. If any hard-fail → quarantine, reject code, notify, document.
6. If soft issue → follow written problem-resolution SOP only.

---

Key Takeaways

• Labels live on the specimen, with two identifiers matching the order.
• Unlabeled/mislabeled = reject; do not process.
• Opened or expired tubes fail integrity even when names match.
• Re-label only via approved, documented process—patient safety outranks speed.