Safety, Compliance, and Best Practices

Transporting laboratory samples—especially blood and other biological materials—requires careful planning, proper packaging, and strict adherence to regulatory standards. Whether you are a hospital, diagnostic lab, research facility, or courier service, understanding the correct procedures for transportation of blood samples to the lab is critical to ensuring sample integrity and protecting everyone involved.

Understanding the Regulations: UN3373 Transport

Biological samples that are not classified as Category A infectious substances typically fall under UN3373 transport regulations. This classification applies to Category B biological substances, including most clinical specimens and blood samples. Compliance with UN3373 requires a three-layer packaging system designed to withstand pressure changes, prevent leaks, and contain any accidental spillage.

The Three-Layer Packaging System

A reliable specimen transport kit generally consists of three key components:

1. Primary Container – A leak-proof tube or vial containing the sample.

2. Secondary Packaging – A durable, leak-proof bag or pouch that holds the primary container. This layer often includes a specimen bag with absorbent pad to soak up any liquid in case of breakage.

3. Outer Packaging – A rigid box or envelope that protects the contents during transit and displays the UN3373 marking.

Using a specimen bag with absorbent pad is especially important for blood sample transport. The absorbent material ensures that if a tube leaks or breaks, the liquid is contained and does not contaminate other items or pose a risk to handlers.

95kPa Specimen Transport Bags: What They Are and How to Use Them

One of the most trusted solutions for secondary packaging is the 95kPa specimen transport bag. These bags are designed to withstand a pressure differential of 95 kilopascals, simulating the conditions of air transport. They are a key component of any specimen transport kit for UN3373-compliant shipments.

How to use a 95kPa specimen transport bag:

1. Place the primary container(s) inside the bag.

2. Add the absorbent pad if it is not already integrated.

3. Remove excess air and seal the bag securely according to the manufacturer’s instructions.

4. Place the sealed bag into the outer packaging.

5. Label the package with the UN3373 mark and any required documentation.

Using kpa bags correctly helps prevent leaks and ensures that your shipment meets international transport standards.

Temperature Control: Isothermal Bag Samples Transportation

Many biological samples require specific temperature conditions during transit. For temperature-sensitive specimens, isothermal bag samples transportation provides a reliable solution. These bags help maintain a stable internal temperature, protecting samples from extreme heat or cold during lab transport.

When transporting blood samples, for example, maintaining the recommended temperature range is essential for accurate test results. Combining an isothermal bag with a 95kPa specimen transport bag and an absorbent pad creates a robust, compliant, and temperature-controlled packaging system.

Secondary Packaging for Biological Material

Secondary packaging for biological material is not just a regulatory requirement—it is a practical safeguard. It provides a second barrier against leaks, protects the primary container from physical damage, and contains any spills. When choosing secondary packaging, look for:

• Leak-proof and tear-resistant materials

• Integrated absorbent pads

• 95kPa pressure resistance

• Clear labeling options

• Compatibility with your existing specimen transport kit

Best Practices for Blood Sample Transport

To ensure safe and accurate transportation of blood samples to the lab, follow these best practices:

• Use a validated specimen transport kit that includes a primary container, absorbent pad, 95kPa bag, and rigid outer box.

• Label all samples clearly with patient information and required documentation.

• Avoid exposing samples to extreme temperatures; use an isothermal bag when necessary.

• Train staff on the correct use of 95kPa specimen transport bag how to use procedures.

• Never transport samples in pockets or loose bags without proper secondary packaging.

• Follow local, national, and international regulations for UN3373 transport.