Thank you all for the prayers! They are definitely working.
Update from this morning:
The doctor came in first thing this morning to see Agnes and he stated that he had been worried that she would not make it through last night. When he walked in, Agnes was awake and wanted to know when breakfast was and when she could go home. He then checked all her numbers - blood pressure was back to normal, oxygen saturation was much better, she had started coughing and loosening up the mucus in her chest and she was hungry! Jennifer (our niece) said he just shook his head and said that he didn't know how she keeps doing it.
Keep the prayers up - it is working! I will let you know if there are any changes.