My father has recently been diagnosed with COPD and is now on Oxygen therapy 24/7. He was recently discharged from hospital after having 8 litres of fluid drained off of his left lung. Last night we had ambulance out due to dad complaining of pain in his back and when they listened to the right side of his chest they could hear fluid on his right lung. Tonight he was very confused and asked where his mum was and if anyone had seen her. My dad has not seen his mother for over 5 years now and she is now in a home herself due to her having dementia. Is COPD linked to dementia and is dementia hereditary? I work in care myself and have never seen this before. Could anyone offer some advice.