Drowning child under the ice

You’re walking your dog. You didn’t want much, it’s beginning of March and the winter is almost over, but the temperature is still around 0 °C. The walk is over and you are going back through the park. Suddenly, you hear from nearby pond screaming for help. You do not hesitate and run to see what’s happening because as a medical student you suspect that something severe might have happened and you know, that providing the first aid is not only your moral obligation, but also an obligation enforced by law.
Glycaemia
Gly
5,2  mmol/L
Complete blood count
HGB
98  g/L
HTC
0,34
ERC
4  x1012/L
LEU
7  x109/L
PLT
120  x109/L
Biochemical analysis
Na
142  mmol/L
K
4,3  mmol/L
Cl
98  mmol/L
Mg
0,9  mmol/L
Ca
2,1  mmol/L
P
1,2  mmol/L
Glycaemia
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Complete blood count
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Biochemical analysis
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