Security manager John Nieuwoudt said people used the wheelchairs to take their relatives to their cars when they were discharged from hospital and many did not return the wheelchairs.
"Depending on the type of wheelchair, the price can start at $1300 and rise to about $1900 per chair, so the hospital is unable to simply replace them when they go missing.
"We cannot afford to replace as many as we would like." Staff spent much time tracking down family members where equipment had been loaned and trying to retrieve the equipment and if all else failed, the matter could be referred to debt collectors.
Several years ago Lakes DHB began purchasing wheelchairs that cannot be collapsed and easily put into the boot of a car, but the wheelchairs continued to go missing.
Physiotherapy team leader Ann McKellar said walking frames and crutches were items that were in especially short supply.
Some patients could experience delays in being discharged from hospital, because of the lack of loan equipment items for patients to take with them to use at home, she said.