Thanks for your question on Health Care Magic.
I can understand your concern.
It seems that your mother was having heart and lung failure.
She was on
oxygen, this suggests lung failure.
She was having edema in lower
limbs, this suggest
heart failure.
And at the age of 87 years, heart and lung failure is having very poor prognosis. Chances of survival are very very less.
In hospital, there is always a triage policy. This means priority given to those patients whose survival chances are more and who are young, so that their life expectancy can be increased.
Honestly speaking, 87 years old, heart and lung failure patient is having least chances of survival. So no point in keeping that patient. It is beneficial for the society to give that bed to other young patient.
Hope I have solved your query. I will be happy to help you further. Thanks.