Around 10 minutes into the second half, with the Steelmen leading through first-half goals from James McFadden and Chris Humphrey, Brittain was carried from the field on a stretcher after falling awkwardly as he tried to tackle Humphrey.
The former St Mirren player has signed a pre-contract with St Johnstone but has publicly and somewhat controversially stated he wants to get out of the two-year deal with the Perth club.
After the game Adams tersely claimed not to know what Brittain's injury was, although it was suggested that it was his knee.
He said: "I am not sure, he is away to hospital now. I am not sure the extent of his injury, we will see. I don't know what's wrong with him and we will obviously assess him when he gets back."
Pressed on the issue, with regards to the midfielder's contractual situation, the former Motherwell player said: "He is away to hospital, don't ask me another question, he is away to hospital."
SPL newcomers County go into the last game of the season away to Inverness next week four points behind Terry Butcher's side and with only local pride to play for as their Highland neighbours and St Johnstone, who host the Steelmen, battle it out for the last European spot.
The Staggies boss, though, refused to be disappointed about missing out on Europe, saying: "We have had a fantastic season. Our main aim before today was to finish in third place because we played our way to that situation, but the main aim at the start of the season was to finish in 11th position.
"We finished in the top six in our first season in the SPL and we are one of the best teams in the SPL this season and I think a lot of credit has to go to the players and the backroom staff.
"We are Ross County Football Club, we are a wee team from the north and we have finished ahead of Aberdeen, Hearts, Hibernian, St Mirren and could finish ahead of Dundee United, so we have had a fantastic season."
- Sports & Recreation
- St Johnstone
- St Mirren
- Chris Humphrey