Student nurses' yellow jug lids flag hospital patients who need fluid monitoring

In 2019 an idea from six student nurses was adopted by hospitals in Wales and England: use yellow water jug lids instead of traditional blue ones to mark patients who are at risk of dehydration or need their fluids restricted. The lids act as a visual marker clearly identified by everyone on the ward.

The nurses — including Charlotte Phillips and Donna Walker — shared the idea on social media the year before, and Cwm Taf University Health Board approached them to trial it on a surgical ward at the Royal Glamorgan Hospital. Walker explained the problem: patients may be on fluid restrictions after complications such as heart failure while others are being encouraged to drink more, and it can be difficult to know which is which on a busy ward.

The trial led to a rollout across the whole Cwm Taf University Health Board area, including Prince Charles Hospital and the Royal Glamorgan, and the scheme was also taken up by Sheffield University Hospital, where a ward used the lids over six months and saw a threefold reduction in vulnerable patients at risk of infection and dehydration. Phillips said there had been a fall in patients at risk of dehydration.

Prof Angela Hopkins, interim executive director of nursing for Cwm Taf, called the yellow lids a simple and effective way to identify patients who may need assistance or encouragement to improve hydration, minimising infection risk and improving health and wellbeing. The nurses hoped to work with other Welsh health boards to roll the lids out across Wales.

It costs essentially nothing — recoloured lids on jugs wards already stock — yet removes a recurring lookup from every nurse's round.

The signal rides on an object that is already in the room and already handled at every drink, so the information updates itself and cannot be left out of a handover.

It started as frontline observations from students, showing that the people closest to the work can design the missing tool better than a policy memo.

The cheapest fix for a communication failure is often to move the information onto the object people already touch: a colour is faster than a chart, and it cannot forget to be passed on.

After the Royal Glamorgan trial, Cwm Taf University Health Board rolled the yellow lids out across its hospitals, including Prince Charles Hospital, and Sheffield University Hospital adopted the scheme independently, reporting a threefold reduction in vulnerable patients at risk of infection and dehydration over six months. The student nurses said they hoped to extend the lids across all Welsh health boards.