CVVH patients – data snapshots The CVVH data collection went live on 20th August 2012. The CVVH data set is collected twice weekly on Monday and Thursday using the Trust Unify system. All Trusts in England are reporting: patient need for CVVH; and the CVVH consumables available locally The purpose of the nationally collated and twice weekly report is to ensure that all hospitals have access to adequate haemofiltration consumables (stock) to meet patient needs locally. An FAQ on the data set is available on Unify and has been circulated to all critical care units. If you need any further advice or guidance on completing the data set or calculating supply please get in touch with your local Critical Care Network or contact Unify.