Fortunately, there was no cold exposure-related frost bite or bony injuries to him, a medical bulletin issued by the hospital said.

"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.

The soldier, who was earlier declared dead by the authorities, was found to be conscious but drowsy and disoriented yesterday after he was located during rescue operation.

"He is currently comatose and continues to be in shock with low blood pressure. He has pneumonia and his investigations have revealed liver and kidney dysfunction," the bulletin read.

He was "severely dehydrated, hypothermic, hypoxic, hypoglycemic and in shock. He was immediately resuscitated by the doctors at the site, who had been there for the past five days in the hope of a survivor," it said. He was treated with warm intravenous fluids, humidified warm oxygen and passive external re-warming.

Koppad was flown out from the site today by helicopter along with a medical specialist to the Siachen Base Camp, from where he was brought to the Thois air base.

Prime Minister Narendra Modi, along with Army Chief Gen Dalbir Singh Suhag, had visited the hospital earlier today.

PM Modi said Koppad is an "outstanding soldier" whose "endurance and indomitable spirit" cannot be described in words. "We are all hoping & praying for the best," PM Modi added.

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