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Due to the increased urinary volume, the patient gets dehydrated and that leads to reduced skin elasticity and dry mucous membranes. It may also result in emerging shock and, if not treated by fluid therapy, you get a situation with apparent shock. A typical symptom for diabetic ketoacidosis is Kussmaul breathing, which means that respiratory rate increases and you have a smell of acetone in the expiratory air.
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Dehydration

  • dry mucous membranes
  • sunken eyes
  • sunken fontanellae
  • reduced skin elasticity
  • emerging shock: cool extremities, increased pulse rate
  • apparent shock: closed periphery, decreased blood pressure, reduced consciousness

Kussmaul breathing: increased respiratory rate, the smell of acetone in the expiratory air