He is expected to remain under observation for several days . NEW : Queen Elizabeth II spent about 50 minutes visiting with her husband at a hospital . The Duke of Edinburgh was admitted to the hospital Monday . He is in critical condition and has been on life support for several days, according to Buckingham Palace spokesman Tim O'Donnell. Prince Philip , who turns 91 on Sunday , missed some Diamond Jubilee events .
NEW : Queen Elizabeth II spent about 50 minutes visiting with her husband at a hospital . The Duke of Edinburgh was admitted to the hospital Monday . He is in critical condition and has been on life support for several days, according to Buckingham Palace spokesman Tim O'Donnell. Prince Philip , who turns 91 on Sunday , missed some Diamond Jubilee events .