At times, planned routine operations are delayed to ensure beds are available for those requiring urgent, emergency attention.
Ar adegau, mae llawdriniaethau arferol sydd wedi’u cynllunio ymlaen llaw’n cael eu gohirio er mwyn sicrhau bod gwelyau ar gael i’r rhai y mae arnynt angen sylw brys mewn argyfwng.