High readings

Hi
I am T2 and have things under fairly good control. However my dad, also T2, doesn't. He has been T2 for over 35 years and has been on insulin for nearly all that time.

He recently told me that his readings are often 'quite high'. When I questioned him he said that they were often in the high 20s. He said his DSN was aware and didn't have any issues with it. My mum then chipped in to say that the DSN advised him that he should try to keep his readings between 6 and 16. Is this likely? It sounds as though the upper limit is far too high.

My dad doesn't eat healthily and (in my opinion) has too many carbs in his diet but at almost 80 I'm not sure that will change.

I guess I'm wondering if the nurse really did say it was ok for him to have bs readings of up to 16. I know in some ways it's none of my business but I worry about his overall health - he finds walking difficult, he keeps having skin breakdown and is worried about hus eyes deteriorating so that he won't be allowed to drive. So there is some incentive to get his bs under control.

Thoughts? Thanks

Thanks for the replies. As far as I know he adjusts his insulin to cover his carbs. He's 78, still driving (I don't think he should be but that's another story) and socially active. But lots of bouts of illheath, permanently tired, dreadful foot ulcers etc.

I'm really surprised that DSN are ok with readings of up to 16 but it sounds as though that's ok for older people with insulin .

I'll ask him about his HBA1C result. He gets very tetchy if people try to tell him.what he shhould/shouldn't be eating. Part of me thinks he should just eat what he wants at his age but he hates the consequences. A bit like a smoker complaint in about being breathless!!