Minimum PPE for liquid nitrogen handling in IVF laboratories includes cryogenic gloves of the appropriate length for the task, a full face shield (not safety goggles, which do not adequately cover the face against LN2 splashes), and a waterproof laboratory apron. These three items are the baseline for any task involving liquid nitrogen — including topping up storage vessels, charging dry shippers, and dispensing from an LN2 dispensing dewar.
Beyond the basic PPE requirement, the working environment matters. The HSE oxygen depletion threshold is 19.5 per cent oxygen concentration. Liquid nitrogen vaporises at approximately 696 times its liquid volume, meaning even small spills in a poorly ventilated or enclosed room can displace oxygen rapidly. Laboratories handling liquid nitrogen in enclosed or poorly ventilated spaces should have continuous oxygen depletion monitors installed and staff trained on evacuation procedures.
The appropriate glove length varies by task. Wrist-length cryogenic gloves are sufficient for low-splash monitoring tasks. Mid-arm or elbow-length gloves are required when dispensing LN2 or charging dry shippers. Shoulder-length gloves are required when reaching into large storage vessels to retrieve canisters. Cryolab supplies cryogenic gloves in all lengths alongside face shields and waterproof aprons. Contact Cryolab for safety equipment supply.
