DMK chief M. Karunanidhi, who was admitted to Kauvery Hospital past 11 p.m. on Thursday, spent Friday in hospital under the care of doctors.
A release from the hospital, signed by S. Aravindan, executive director, said he had undergone a tracheostomy procedure to optimise breathing. The procedure was necessitated by the fact that he had breathing difficulty caused by a throat and lung infection.
It may be recalled that he had earlier been admitted to Kauvery Hospital on December 1, a short while after he reportedly developed a drug-induced skin allergy.
