How much liquid nitrogen should your IVF laboratory be consuming per week and what does excess consumption tell you?

How much liquid nitrogen should your IVF laboratory be consuming per week and what does excess consumption tell you?

A 20-litre storage dewar with a static evaporation rate of 0.1 litres per day should consume approximately 0.7 litres of LN2 per week under normal conditions, assuming the lid remains closed between top-ups and the vessel is in good vacuum condition. If your laboratory is consuming significantly more than the rated evaporation figure, the vessel is telling you something. Vacuum degradation, frequent lid removal during busy retrieval sessions, and neck ice build-up restricting the lid seal are the three most common causes of above-specification LN2 consumption in IVF laboratories.

Tracking weekly LN2 consumption per vessel is one of the simplest and most cost-effective quality indicators available to a laboratory manager. A vessel that suddenly requires top-up twice as frequently as the previous month has likely suffered partial vacuum loss and should be inspected before it fails entirely during a period when replacement stock is unavailable. Cryolab’s storage dewar range is supplied with rated static evaporation figures for each model, giving laboratory managers a baseline against which actual consumption can be monitored. Contact Cryolab if a vessel in your facility is consuming LN2 above its rated specification. CryoGPT can help calculate expected weekly consumption based on your vessel model and access frequency.