The Mater Misericordiae University Hospital (commonly known as the Mater or MMUH (Irish: Ospidéal an Mater Misercordiae)) is a major teaching hospital, based at Eccles Street, Phibsboro, on the northside of Dublin, Ireland. Mater misericordiae means "Mother of Mercy" in Latin, a title of the Blessed Virgin Mary from the Catholic hymn Salve Regina and alludes to its founders, the Sisters of Mercy.
The hospital stands next to the Children's University Hospital, Temple Street, and has provided public hospital care to adult patients for more than 150 years. It was established by the Sisters of Mercy as a Roman Catholic voluntary hospital within the health system of Ireland.
It is associated with the National University of Ireland (University College Dublin School of Medicine) and provides national tertiary care in many branches of medicine.
The first endoscope was used in the Mater. The hospital is mentioned by Buck Mulligan in James Joyce's Ulysses.
The Mater Hospital is a tertiary referral centre for cardiothoracic surgery as well as housing the National Spinal injuries unit. It also houses the national heart and lung transplant programme. The National Pulmonary Hypertension Unit is also the leading centre in this area in Ireland. It also is a major centre for cardiology offering the only 24-hour, 365-days-per-year interventional cardiology service in the country. It is also expected to be the first public hospital in Ireland to offer percutaneous heart valve replacement in the coming weeks. It offers regional dermatology and ophthalmology service. As well as nephrology, neurology, respiratory medicine, endocrinology and diabetology, GI medicine and hepatology and infectious diseases, which contains a new multimillion-euro negative-pressure ventilation ward to house the National Bio-Terrorism Unit.
The Irish government decided to locate a new €800 million children's hospital complex on the site of the Mater; this decision was later retracted, with St. James's Hospital being named the new proposed site.