Hospital bosses in Bradford have announced an amnesty in a bid to recover the £100,000 worth of equipment which goes missing each year.
The Bradford Teaching Hospitals Trust is urging people to check their homes for equipment such as crutches, walking frames and Tens pain relief machines.
A trust spokesman said the NHS had to "fork out needless money on equipment people have forgotten to bring back".
The amnesty will run throughout June, July and August, the trust said.
It said that each year more than £100,000 worth of "vital hospital equipment" was not returned to the city's Bradford Royal Infirmary and St Luke's Hospital.
'Era of austerity'
Physiotherapy manager Jill Gregson, who is leading the amnesty, said: "Many patients simply forget to return the equipment that has been loaned to them by the hospital, once they are no longer needed and instead store them in garages, cupboards or sheds.
"The idea of the amnesty is to encourage local people to have a good look around their homes, including attics and garages, and to return any pieces of equipment to the hospital, so that they can be cleaned and reused by patients who require them.
"In this new era of austerity within the NHS the returned equipment will boost our stocks and help us to ensure we have the right piece of equipment for future patients.
"It is really important to us that we don't want people to feel embarrassed when they return these items as we are just very grateful that they have been returned."
People can leave hospital equipment between 0900 BST and 1600 BST, Monday to Friday at Wheelchair Services, Cemetery Road, Bradford or the physiotherapy departments at Bradford Royal Infirmary and St Luke's Hospital.