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Public inquiries dominated local news from Muckamore to urology, neurology and hyponatraemia - Northern Ireland has an unhealthy share of major investigations into aspects of its health and social care system.

Hyponatraemia is an abnormally low level of sodium in blood.

Raychel Ferguson, from Londonderry, died at the Royal Belfast Hospital for Sick Children in June 2001 from hyponatraemia.

The mother of a nine-year-old girl who died from hyponatraemia has said a new inquest that starts today is "an opportunity for truth".

Hyponatraemia is an abnormally low level of sodium in blood and can occur when fluids are incorrectly administered.