Why Specimen Tracking Technology Matters

Specimen tracking ensures that patient samples, such as blood, tissue, and urine, are accurately identified, handled, and monitored throughout their lifecycle. From collection to testing and storage, every step must be documented to maintain patient safety, diagnostic accuracy, and regulatory compliance.

When tracking breaks down, the impact is immediate: delayed diagnoses, repeat collections, increased costs, and reduced patient trust. That’s why healthcare organizations aim to maintain a complete chain of custody, capturing what happened, when, where, and who handled each specimen.

What is Specimen Tracking?

Specimen tracking combines processes and technology to ensure three core capabilities:

• Identification: Linking the specimen to the correct patient and order
• Location Visibility: Knowing where the specimens are throughout the workflow
• Chain of Custody: Recording every handoff and interaction

Most healthcare organizations rely on a mix of technologies depending on workflow complexity, risk level, and required visibility.

Types of Specimen Tracking Technologies

The most common technologies used in specimen tracking are barcode scanning, passive RFID, and RTLS. Each offers a different level of automation and visibility, ranging from manual point-in-time scans to continuous real-time location tracking.

1. Barcode Scanning

Barcode scanning uses a printed label that staff manually scan at key workflow points, such as collection, accessioning, testing, and storage. Each scan creates a record tied to the specimen, patient order, handler, time, and location.

Best for: High volume processing and routine workflows where speed is essential.

Pros:

• Easy to implement
• Compatible with existing LIS, EHR, and laboratory workflows
• Low interference risk- rarely affected by surrounding materials
• Improves identification accuracy compared to manual paper-based processes

Cons:

• Relies on manual scanning at every step, slowing workflows and limiting throughput.
• Requires direct line-of-sight between the barcodes and scanner and provides point-in-time visibility only
• Missed scans can create gaps in chain of custody documentation
• Limited by label damage and low storage capacity

2. RFID

Radio Frequency Identification (RFID) is a tracking technology that uses radio waves to identify and monitor tagged items without requiring direct line-of-sight. RFID tags communicate with RFID readers wirelessly, allowing specimens to be tracked automatically as they move through the workflow.

Passive RFID is commonly used to automate documentation at specific workflow points. These tags are battery-free and communicate with RFID readers when they pass within range, allowing specimens to be recorded as they move through key checkpoints. However, because passive RFID depends on fixed reader locations, it typically provides checkpoint-based visibility rather than continuous, real-time location visibility. RFID systems are categorized as either passive RFID or active RFID, each offering different levels of visibility and automation. Passive RFID is typically used to document specimen movement at specific workflow points, while Active RFID can provide continuous, real-time location visibility throughout the facility.

Best for: Automating handoffs and reducing scan burden.

Pros:

• Does not require direct line-of-sight between the tag and reader

• Improved chain-of-custody documentation

• Automated specimen tracking at workflow checkpoints

Cons:

• Higher implementation costs than barcode systems

• Requires RFID readers and supporting infrastructure

• Performance can be affected by environmental conditions, liquids, or metal surfaces

3. RTLS

RTLS (Real-Time Location Systems) provides continuous location visibility by using a network of tags, sensors, receivers, and software.

RTLS can help staff see where high-risk or time-sensitive specimens are in real time, generate alerts when a specimen is delayed, above or below proper temperature regulation, or leaves a defined area, and support stronger chain-of-custody documentation across complex workflows.

While RTLS for specimen tracking has historically been viewed as complex and costly to implement, Bluetooth Low Energy (BLE)-based approaches are making real-time visibility more practical and accessible. Small, disposable, economical BLE sticker tags that can be attached directly to containers communicate with BLE-enabled access points or existing infrastructure already deployed in within the facility. By reducing the need for dedicated hardware and simplifying implementation, BLE is helping make RTLS a more scalable option for specimen tracking.

Best for: Compliance-driven environments, high-risk workflows, irreplaceable, high value specimens, and organizations requiring end-to-end visibility.

Pros:

• Continuous, automated chain-of-custody documentation
• Eliminates missed scans and manual data entry gaps
• Enables audit-ready reporting for compliance and accreditation
• Provides time-stamped location history for every specimen
• Supports alerts for delays, temperature excursions, or process deviations
• Reduces risk of lost specimens and undocumented handoffs

Cons:

• Requires infrastructure and system integrations
• Implementation complexity

The Shift Toward Real-Time Visibility

Traditional methods like barcode scanning and passive RFID have long supported specimen tracking, but both rely on manual steps or fixed checkpoints. This can leave gaps in visibility and increase the risk of errors.

RTLS represents a more advanced approach. By providing continuous, automated tracking, it eliminates reliance on manual scans and delivers a complete, real-time chain of custody.

As hospitals modernize, many are moving toward RTLS as a unified platform, integrating with LIS and EHR systems to provide end-to-end visibility, automated documentation, and more efficient workflows.

The Bottom Line

Specimen tracking is critical to patient safety and operational efficiency. While barcode and RFID solutions still play important roles, the shift toward real-time visibility is reshaping how healthcare organizations manage specimen tracking.

By adopting RTLS, hospitals can reduce errors, minimize manual processes, and gain confidence that every specimen is accounted for, at every step.

Take the first step toward more accurate, compliant specimen tracking. Fill out the form to learn how RTLS helps reduce manual processes, minimize errors, and meet reporting requirements.