A PERFECT storm engulfing the Scottish NHS “goes straight to the door” of the SNP Health Secretary, opposition parties said today.

Under-fire Shona Robison faced renewed calls to quit today as new figures showed the extent of the crisis, with spiralling bed-blocking and operation cancellations.

And in March just 87.9 per cent of casualty patients were processed within four hours, way below the government’s target of 95 per cent.

Ms Robison has faced pressure to resign since a scandal deepened at her local health board last month. NHS Tayside directors dipped into public donations for general spending amid a financial crisis.

Now figures show that in March, Scottish hospitals delayed patients’ discharge by a combined 42,628 days.

Known as bed-blocking, it happens because adequate care is not available elsewhere, often because of council cuts to homecare.

In 2015 Ms Robison said she wanted, “over the course of this year, to eradicate delayed discharge out of the system.” But more than 1.6 million bed days have been lost due to bed-blocking since she made the pledge.

Scottish Labour health spokesman Anas Sarwar said: “Shona Robison’s failure to keep her promise on delayed discharge has cost our health service a staggering £380 million.”

Other statistics showed that more than 3,100 operations have been cancelled due to capacity or non-clinical reasons so far in 2018.

And a staffing crisis “with huge unfilled gaps for consultants, nurses and midwives,” Mr Anwar said, “goes straight to the door of the Health Secretary.”

The Scottish Tories and Lib Dems also blamed Ms Robison.

But the Health Secretary said: “Severe weather and warnings not to travel did mean many staff could not get to hospital, and this level of disruption takes hospitals time to recover from.”