Pope Francis was in stable condition Tuesday and breathing with just the help of supplemental oxygen after respiratory crises a day earlier, but will resume using a ventilation mask at night, the Vatican said.

In its late update, the Vatican said Francis had no further respiratory episodes during a day spent praying, resting and undergoing respiratory physiotherapy.

Doctors said that they would put the noninvasive mechanical ventilation mask back on him while he sleeps, but that during the day he was only using high flows of supplemental oxygen.

Doctors said his prognosis remains guarded, meaning he is not out of danger.