Phlebotomy · Processing · 6 min read
Specimen Transport, Shipping and Research Protocols
- Identify proper handling, packaging, and temperature requirements for routine, pneumatic tube, and off-site specimen transport.
- Explain the triple packaging, labeling, and documentation guidelines for shipping Category B biological substances and dry ice.
- Describe the phlebotomist's responsibilities during research protocol collection, specimen retention, and biohazard waste disposal.
Routine Specimen Transport and Temperature Management
Ensuring specimen integrity begins immediately after collection. Primary specimen collection containers, such as evacuated blood tubes, must be leak-proof and securely capped prior to transport. These primary containers are placed inside the sealable compartment of a specimen transport bag, which typically features a universal biohazard symbol and a dual-pouch design. To prevent contamination from potential leaks, the laboratory requisition slip is placed in the separate outer pocket of the transport bag rather than inside with the blood tube.
Certain diagnostic tests require strict temperature maintenance during transit to keep analytes stable. Chilled specimens must be transported on wet ice, an ice-water slurry, or chilled cold packs according to protocol. Whole blood tubes must not come into direct contact with frozen ice packs because freezing can cause hemolysis and interfere with affected test results. Frozen specimens must remain completely frozen throughout transport, typically packed with dry ice.
Light-sensitive specimens require immediate shielding from environmental light during transport. Phlebotomists protect these samples by placing them in amber bags, wrapping them in aluminum foil, or placing them into opaque containers. If any specimen container is found broken or leaking during handling, the phlebotomist must report it to the laboratory or supervisor, follow spill-safety procedures, and arrange for a recollection if instructed.
| Handling Condition | Approved Transport Method | Critical Handling Rule |
|---|---|---|
| Light-Sensitive | Amber bags, aluminum foil, or opaque containers | Shield entirely from light exposure during transit. |
| Chilled Specimen | Wet ice, ice-water slurry, or chilled cold packs | Keep whole blood from direct contact with frozen packs to avoid freezing. |
| Frozen Specimen | Dry ice packing | Specimen must remain completely frozen throughout transport. |
| Routine Liquid | Sealable dual-pouch biohazard bag | Place requisition slip in separate outer pocket away from primary tube. |
Common mistakes
- Placing whole blood collection tubes directly against frozen ice packs, which freezes the red blood cells and causes severe hemolysis.
- Tucking the paper laboratory requisition slip inside the primary sealable compartment of the transport bag instead of the outer protective pocket.
- Using an airtight, unvented container to ship specimens packed on dry ice, creating a hazard as carbon dioxide gas expands.
- Failing to place absorbent material between the primary and secondary packaging during Category B liquid specimen shipping, or using an insufficient amount to absorb the entire liquid volume.
Key points
- Primary containers must be leak-proof and securely capped, placed in the sealed compartment of a biohazard bag with the requisition slip kept in the outer pocket.
- Temperature-sensitive samples must be carefully controlled: light-sensitive tubes require shielding, chilled tubes must avoid direct contact with frozen packs to prevent hemolysis, and frozen samples must remain completely frozen.
- Pneumatic tube transport rapidly moves padded specimens, but mechanical forces can cause hemolysis affecting tests like potassium and LDH; leaks require immediate notification of the supervisor.
- Category B biological substances (UN 3373) require trained personnel, triple packaging, and specific outer-package labeling; liquid shipments also require sufficient absorbent material, and liquid air shipments require either the primary or secondary packaging to withstand a 95 kPa pressure differential.
- Packages containing dry ice must allow carbon dioxide gas to escape; air shipments also require applicable UN 1845 markings, the net mass of dry ice in kilograms, and a Class 9 label.
- Research protocols require strict adherence to standard operating procedures, participant identity matching, exact timing documentation, study-specific aliquot labeling, and immediate reporting of deviations.
- Safe waste disposal requires discarding sharps immediately into rigid puncture-resistant containers, placing glass tubes in sharps containers when required, and organizing retained capped tubes systematically by date and accession number.
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