Wouldn’t it be nice if the samples just magically appeared in the laboratory? Sometimes I wish we had a transporter like in Star Trek that could miraculously produce tubes in the rack already sorted and spun. The reality is, however, that we must rely on others to package and transport samples to the lab. Whether it’s blood, urine, body fluids, or even tissues samples, they make their way from the collection site to the lab. If you work in a hospital setting, samples are delivered to the lab by one of two methods, a pneumatic tube system (PTS), or an internal courier.
- Although very convenient when they work, pneumatic tube systems have a few drawbacks. Tube carriers can quickly become an ergonomic safety concern if staff are not properly trained. It is best to limit the number of samples placed in a single tube as overcrowded tubes can be heavy and cause hand and wrist strains if not properly lifted. Sharps such as syringes or needles should never be transported via the PTS. The person opening the tube may not know they are in there and could easily receive a needlestick exposure. It is not a good idea to transport stool or respiratory samples through the PTS either. Specimen containers could open or break inside the tube carrier and give the recipient a not so nice surprise. Additionally, pneumatic tube carriers are known to aerosolize samples. If a spill were to occur, the pneumatic tube system would have to be cleaned or disinfected immediately. Most maintenance or facilities departments have special carriers designed to disinfect the system in the event of a spill. The hardest part may be getting staff to report the spill and initiating the proper cleanup.
2. Some laboratory samples are walked down to the lab. Samples must be in a closed primary container and placed in a clean secondary container, usually a sample transport bag. Often, we see staff who are wearing gloves while walking samples to the lab. When asked, they state that they are carrying stool or COVID specimens and don’t want to contaminate themselves. The outside of the secondary container is considered clean, so there should be no need for gloves. Furthermore, if the gloves or outside of the transport bags are truly contaminated, these staff would be bringing contaminated items through the clean hallways of the facility. Then they would open the door to the lab, which is considered clean, with those same contaminated gloves. The Centers for Disease Control (CDC) has guidelines to mitigate the risk of bringing potentially infectious material into clean areas. The Core Infection Prevention and Control Practices for Safe Healthcare Delivery in All Settings document states that staff must “remove and discard PPE upon completing a task before leaving the patient’s room or care area”1. Another thing to consider is what happens if one of the containers leaks during transport. Or even worse, what if a spill were to occur? Small amounts of blood or body fluid can easily be cleaned with an absorbent and disinfectant. A larger spill, say a 24-hour urine jug, or a hazardous material spill like a tissue sample in a large container filled with formalin, would need more attention. Staff should be trained in how to handle large volume spills and transporters should take precautions, such as using a cart and having a spill kit on hand when moving hazardous material like formalin.
Laboratory staff may not be the ones packaging and shipping samples to the lab, but they are often the recipients and have the responsibility to ensure they themselves and others remain protected. If staff should encounter specimen transport problem situations, be sure they have an effective pathway to communicate and escalate concerns. Often the staff sending specimens are not aware of the risks, so labs should provide that education- they will be thankful for it. Preanalytical processes are at the start of the road toward quality lab results, and everyone involved in each step should keep safe work practices at the forefront.
- Centers for Disease Control. CDC’s Core Infection Prevention and Control Practices for Safe Healthcare Delivery in All Settings. (2022). Retrieved from https://www.cdc.gov/infectioncontrol/guidelines/core-practices/index.html
-Jason P. Nagy, PhD, MLS(ASCP)CM is a Lab Safety Coordinator for Sentara Healthcare, a hospital system with laboratories throughout Virginia and North Carolina. He is an experienced Technical Specialist with a background in biotechnology, molecular biology, clinical labs, and most recently, a focus in laboratory safety.
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