We have recently experienced issues with histology samples leaking during transport, even when containers have been sealed with Parafilm or tape. In most cases, the cause is container lids not securely fastened before sealing. Please ensure that lids are tightened properly — no amount of tape or external sealing can prevent leakage if the lid itself is not secure.
To ensure the safe transport and processing of diagnostic samples, please take extra care to secure all sample container lids before submission. This is especially important for containers containing formalin, as leakage poses a safety risk.
✅ Please Do:
– Choose an adequately sized container — remember that tissue will swell during fixation.
– Ensure the lid is securely fastened before sealing the container with Parafilm.
– Place the closed, sealed sample container inside a sealed sample bag for transport.
🚫 Please Do Not:
– Cram an unfixed sample into a container — it cannot be safely removed or properly fixed.
– Put Parafilm under the lid — it will not seal correctly and can prove difficult/dangerous removing a cross-threaded lid.
– Use Sellotape to seal sample containers — it is not leak-proof.
We have some great resources on our website that will assist with sample packaging:
> Sample packaging instructions
> Fixing and submitting large organs
> Biopsy / mass submission
Thank you for your cooperation in helping us maintain safety and sample integrity. If you have any questions or concerns please don’t hesitate to contact us.