"Our medical team's investigations upon her arrival at the hospital yesterday showed that in addition to her prior cardiac arrest, she also had infection of her lungs and abdomen, as well as significant brain injury," said Dr Kelvin Loh, Chief Executive Officer, Mount Elizabeth Hospital.

In a statement, Dr Loh said, "The patient is currently struggling against the odds, and fighting for her life." Briefing reporters here on girl's condition, Loh said, "As at 28 December, 11am (8:30 IST) the patient continues to remain in an extremely critical condition."

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The girl, who was gangraped and brutally assaulted in a moving bus on December 16, was brought here in an air ambulance yesterday and admitted to the Intensive Care Unit.

She had undergone three surgeries at the Safdarjung Hospital in Delhi, where she remained on ventilator support during most part of the treatment. Doctors removed major part of her intestines which had become gangrenous.

"A multi-disciplinary team of specialists has been working tirelessly to treat her since her arrival, and is doing everything possible to stabilise her condition over the next few days," Dr Loh said.

"The High Commission of India has been fully supportive in helping the hospital and her family, and ensuring that the best care is made available," he added.

The security was tightened at the hospital, favoured by well-heeled patients, with each visitor screened before being allowed into the ICU.

The patient had suffered a cardiac arrest in the early hours of Wednesday which has led to severe cardiac complications. While the Mount Elizabeth authorities described her condition as “extremely critical” in a statement issued on Thursday evening, highly placed sources said there were at least two “positive signs” by Thursday night.

According to these sources, the victim’s heart rate was down from 165 beats per minute to about 100 beats per minute. She was also able to pass urine by the end of the day.

During the six-hour flight from Delhi to Singapore, the team of doctors from Safdarjung Hospital and Medanta who were accompanying her had to perform an arterial cannulation procedure to closely monitor her blood pressure after it showed a steep fall.

As soon as she arrived at the Singapore hospital at around 7 am, a whole body CT scan was performed, after which she was immediately transferred to the ICU. She has been placed under the care of Dr Denis Nyam, a general surgeon, who is leading a multi-disciplinary team of five doctors which coordinated her transfer to Singapore.

“As at 7 pm (Singapore time) the patient remains in an extremely critical condition. She is under treatment at Mount Elizabeth Hospital’s intensive care unit. Prior to her arrival, she has already undergone three abdominal surgeries, and experienced a cardiac arrest in India. A multi-disciplinary team of specialists is taking care of her and doing everything possible to stabilise her condition,” said Dr Kevin Loh, CEO of the Mount Elizabeth hospital.

Before she was admitted in the Singapore hospital the patient had undergone several abdominal surgeries and had experienced two cardiac arrests while undergoing treatment at the Safdarjung Hospital in Delhi.

With Doctors at Mount Elizabeth Hospital in Singapore taking over the treatment of the patient, the medical team which had accompanied her will return back to India on Friday.

Besides a few doctors from Medanta MediCity Hospital in Gurgaon, the head of the Intensive Care Unit of Safdarjung Hospital P K Verma had accompanied the girl to Singapore.

Sources said the government was also in touch with the Indian Embassy in Singapore which was constantly monitoring the girl's medical condition. Doctors are also in touch with some top medical institutes of the world which are specialists in organ transplantation.

Doctors at the Safdarjung Hospital, where she was treated for the past ten days said they gave her the best of the treatment available.