Writing a TB laboratory procedure for mislabeled specimens

A clear procedure for handling mislabeled specimens protects patients, laboratory staff and the integrity of tuberculosis testing. A missing identifier, inconsistent date of birth or specimen container labelled for the wrong patient can lead to delayed diagnosis, an incorrect result or an inappropriate treatment decision. The response must therefore be consistent, documented and easy to follow during a busy shift.

Mislabelling is usually treated as a pre-examination nonconformity. Some errors require immediate rejection and recollection, while others may be repairable through a controlled process involving the requesting clinician, the collector and the laboratory supervisor. A written procedure should define that distinction rather than leaving staff to rely on memory or informal workarounds.

For Australian laboratories, the procedure should fit local accreditation and safety expectations, including NATA assessment against ISO 15189, jurisdictional work health and safety obligations, and privacy requirements. It also needs to work in practical settings, from a metropolitan service in Melbourne or Sydney to a regional laboratory receiving specimens from remote clinics by scheduled courier.

The GLI Quality Tool can help a laboratory place this procedure within a broader quality management system. Its phased approach and Quality Systems Essentials encourage laboratories to connect specimen identification, personnel competency, documentation, assessment, safety and continual improvement instead of treating an incident as an isolated paperwork problem.

Define the purpose and scope

Start by stating which specimens and testing activities are covered. The procedure may apply to sputum, induced sputum, bronchoalveolar lavage, gastric aspirates, tissue, body fluids and other materials submitted for smear microscopy, molecular testing, culture or drug susceptibility testing. It should cover specimens received directly from hospital wards, general practices, community collection centres, prisons, aged-care services and interstate or rural referral sites.

Define the terms used by staff. A “mislabeled specimen” might have no patient label, an incorrect patient name, a mismatched medical record number, an incorrect collection date or a label attached to the wrong container. A “repairable error” is an administrative discrepancy that can be verified through an authorised source without relabelling the container or compromising specimen identity. The procedure should state that staff must never guess, overwrite the original label or silently correct information.

The scope should also identify who may make decisions. Reception staff can quarantine a specimen and notify the relevant area, while a senior medical scientist, laboratory manager or designated pathologist may approve a repairable-error pathway. When the specimen is high risk, irreplaceable or associated with suspected infectious tuberculosis, the escalation route should be explicit.

Set identification and rejection rules

The central rule is that the laboratory must be able to establish a reliable link between the specimen, the request and the patient. At minimum, the container and request should be compared using approved identifiers, such as full name, date of birth, medical record number, Medicare-related administrative details where appropriate, collection date and collection time. The procedure should specify the minimum number of matching identifiers required by the service.

Immediate rejection is generally appropriate when the container is unlabelled, the identifiers conflict, the specimen appears to belong to another patient, the request cannot be linked to a patient, or the container has been relabelled after collection. A leaking or broken container, an unsuitable specimen type or a specimen received without required safety information may also need rejection or specialist review. These decisions should be based on documented risk, not on the perceived inconvenience of recollection.

Repair may be considered for a minor, verifiable discrepancy. For example, the request may contain a typographical error while the specimen label, electronic order and collector record consistently identify the patient. Another example could be a missing collection time where the collector can confirm it from a contemporaneous record. The correction should be made in the laboratory information system with an audit trail, while the physical container remains unchanged unless a controlled relabelling policy expressly permits it.

Create a safe response workflow

The first action is to place the specimen in a designated hold area and prevent unapproved testing or disposal. Staff should use the laboratory’s biosafety controls for potentially infectious material, including appropriate gloves, protective clothing, containment and hand hygiene. The hand hygiene protocol can support consistent wording for glove use, glove removal and hand decontamination within the procedure.

The next steps should appear in a simple sequence: identify the discrepancy, record the time and staff member, assess the specimen condition, notify the requesting service, obtain verification from an authorised person, decide whether to reject or repair, and document the final disposition. Staff should not telephone a ward and then proceed without recording who provided the information and what was confirmed.

For suspected tuberculosis, the procedure should explain how urgency is balanced with patient safety. A limited, high-value specimen may require consultation with the senior scientist or clinical team before rejection. Testing should proceed only when the identity risk has been resolved and the decision is documented. If recollection is required, the requesting service should receive clear instructions about the correct container, collection method, labelling at the point of collection and safe transport.

Document communication and traceability

Every event should produce a contemporaneous record. Useful fields include the patient and specimen identifiers, submitting location, specimen type, collection details, discrepancy, date and time received, staff involved, communications, authorisation, testing status, final decision and corrective action. The record should distinguish facts from assumptions and preserve the original information rather than replacing it.

A rejection or repair notice should be concise and practical. It can state the problem, explain the clinical consequence, specify whether a new specimen is required and name the contact point for urgent advice. Australian services often receive specimens through electronic requesting systems, courier runs and shared hospital networks, so the procedure should define how phone calls, electronic messages and paper forms are retained.

The approved version of the procedure must be available where the work occurs, including specimen reception, the TB testing area and any after-hours location. A sound document control system helps ensure staff use the current form, understand revision changes and can retrieve an older version when investigating an incident. Superseded copies should be removed from shared drives, binders and local desktop folders.

Assign responsibilities and train staff

Responsibilities should be allocated across the specimen pathway. Collectors must positively identify the patient, label the container immediately after collection and complete the request accurately. Couriers should maintain transport conditions and report damaged packaging. Reception staff should check identifiers and quarantine discrepancies. Scientists and supervisors should assess risk, authorise exceptional decisions and ensure clinical communication.

Training should use realistic examples rather than a single annual slide presentation. Scenarios might include a sputum jar with a surname misspelt, two containers in one bag with swapped labels, a request from a remote Queensland clinic with a missing collection time, or a specimen arriving after a public holiday in Perth. Staff should practise documenting the event without changing the physical label or making assumptions.

Competency assessment can include direct observation, review of completed discrepancy records and short case-based exercises. New employees, temporary staff and staff returning from extended leave should receive orientation before handling specimens independently. The procedure should also identify who provides advice during nights, weekends and public holidays when the usual supervisor is unavailable.

Monitor trends and improve the process

A laboratory should monitor mislabeled and rejected specimens by submitting location, collector group, specimen type, error category and time period. Rates can be expressed against the number of specimens received so that a high-volume metropolitan service is not compared unfairly with a small regional service. Repeated errors from one ward, clinic or collection route may indicate a process problem rather than individual carelessness.

Review patterns such as missing identifiers, wrong labels, incomplete requests, transport damage and delayed recollection. A monthly or quarterly review can identify whether staff need clearer labels, redesigned request forms, point-of-collection prompts or additional training. The aim is to correct system weaknesses while preserving accountability for unsafe practice.

The physical environment also influences identification accuracy. Specimen reception should have adequate lighting, a clean separation between received and verified material, secure storage for quarantined items and enough bench space to process one patient’s material at a time. Guidance on a quality workflow floor plan can help laboratories reduce mix-ups caused by crowding, interruptions and poorly placed equipment.

Corrective actions should have an owner, a due date and an effectiveness check. For example, after introducing a new collection label or refresher training, the laboratory can compare error data over the following months. Findings should feed into management review, internal audits and updates to the procedure, forms and competency materials.

Adopt the procedure as a controlled document, test it with specimen reception and TB testing staff, and adapt the decision points to your laboratory’s risks, staffing and referral pathways. Use the GLI Quality Tool resources to connect the process with biosafety, personnel competency, document control, assessment and continual improvement, then begin measuring errors and follow-up actions from the first day of implementation.