A man has spent 20 hours on the floor of a toilet cubicle after collapsing at Sydney’s Royal North Shore Hospital on Monday.

Management have pledged to investigate the incident, described as ‘distressing’ by New South Wales Heath Minister Jillian Skinner.

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“This is a distressing case and I extend my sympathy to this gentleman and his family,” Ms Skinner said in a statement, adding the hospital had begun a “major investigation” into the incident.

“I have asked the hospital to keep me informed of the progress of the investigation — and of any further measures which would prevent a repeat of such an incident.”

The 67-year-old man arrived at the hospital on Monday but was found by a cleaner in the toilet cubicle on Tuesday morning more than twenty hours after he arrived.

He had been due for a diabetes appointment on Monday morning but suffered a stroke in the bathroom, Channel Nine reported.

His wife raised the alarm after he failed to return home that evening.

The man remains in a critical condition.

Hospital management said they would amend their protocols to include check toilets.

– with ABC