"missed diagnosis"

My father had began being ill on a Tuesday, paramedic told him to go to A & E for possible urine infection. Doc checked him for 2 mins and sent home with Diaoralyte. Dad got worse couldn't stand, talk, high temp-low temp, breathing issue, grey. 2nd paramedic came out said it could be anemia so called a doc out who said he'd got noise on the chest but just handed antibiotics. By Sunday he was so much worse this time paramedics took to the manor, xray done to find pneumonia. Took to AMU then though the night he couldn't breath, male nurse not interested until Dad thought he was having heart attack, sats were only 44% and was rushed to ITU where he was very poorly for a week, breathing mask, drips everywhere and a catheter. ..a healthy man never hospitalised to dangerously poorly. I blame all that were involved in the health care apart from ITU. You let a healthy 62 yr old man become an invalid. ...Thanks