Hi,
Thanks for your question.
I feel really sorry after going through your question.
Most likely possibility in your husband is urinary infections.
You should consult your doctor immediately.
There is need for -
1) Detailed clinical Examination.
2) Urine Examination along with urine culture.
3) Blood tests like Complete haemogram, Renal Function Test,
Liver Function Test, Serum Calcium,
Magnesium, Phosphates.
4)
Ultrasonography of abdomen and Pelvis.
5) Cardiac evaluation.
6) Blood sugar monitoring.
7) May require
Insulin for better
Diabetes control.
He may require Intravenous Antibiotics with close monitoring of renal functions.
Monitoring of respiratory function is also important as his COPD may complicate his recovery.
Hope this helps you, if so do vote.