He is comatose and his condition is extremely critical, Army Hospital Research and Referral said after Koppad was flown in here from Siachen Glacier today.
Prime Minister Narendra Modi, Defence Minister Manohar Parrikar and Army chief Gen Dalbir Singh Suhag visited the hospital and asked the nation to pray for his well being.
Koppad, who was rescued yesterday from an altitude of 20,500 feet by a team of over 150 soldiers and two canines, Dot and Misha, and was initially declared dead by authorities, was flown in here by an IAF aircraft accompanied by a critical care specialist of the force and a medical specialist from the Siachen base camp.
"He has been placed on a ventilator to protect his airway and lungs in view of his comatose state. He remains extremely critical and is expected to have a stormy course in the next 24 to 48 hrs due to the complications caused by re-warming and establishment of blood flow to the cold parts of the body," it said.
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His family's joy knew no limits as the news trickled in of him being alive.
"It is a rebirth for all of us," said Mahadevi, wife of Koppad, with a visible sense of relief as his miraculous survival.
"We were going through a painful ordeal after the avalanche struck...The news of his survival brought smiles backon our faces. We were all crying and had almost lost hope. I didn't know what to do. I have a one-and-half-year old daughter," she said.
Prime Minister Modi described Koppad as an "outstanding soldier" whose "endurance and indomitable spirit" cannot be described in words.
"We are all hoping and praying for the best," Modi added.