Roedd yr archwiliadau dirybudd yn elfen graidd o ymateb Llywodraeth Cymru i'r adroddiad Ymddiried mewn Gofal, a gyhoeddwyd ym mis Mai yn dilyn ymchwiliad annibynnol i'r gofal a ddarpeir yn Ysbyty Tywysoges Cymru ac Ysbyty Castell-nedd Port Talbot gan yr Athro June Andrews a Mark Butler.
The spot checks were a core element of the Welsh Government’s response to the publication of the Trusted to Care report, which was published in May and followed an independent inquiry into care at Princess of Wales and Neath Port Talbot hospitals by Professor June Andrews and Mark Butler.