Doctors treating the Israeli Prime Minister, Ariel Sharon, have replaced his breathing tube.
They said Mr Sharon's condition continues to be critical but stable following the major stroke he suffered two weeks ago.
Mr Sharon underwent a tracheotomy operation on Sunday to allow him to breathe without a respirator.
He remains in a coma and has shown only minor responses to stimuli. His deputy Ehud Olmert has been named interim PM.
A spokesman for the Hadassah hospital in Jerusalem, where Mr Sharon is being treated, said the procedure to replace the breathing tube was carried out overnight because of a technical issue.
ARIEL SHARON'S HEALTH
Scans have revealed activity on both sides of Mr Sharon's brain, but the extent of any brain damage or incapacity cannot be known until he wakes from his coma.
Mr Sharon's newly-created centrist party, Kadima, is preparing to fight elections on 28 March under the leadership of Mr Olmert.
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