what constitutes mild dehydration
5% loss of body weight
what are the features of mild dehydration
increased pulse
dry mouth
oliguria
thirst
what are the features of moderate dehydration (10%)
agitation/ drowsiness loss of turgor, dry skin, sunken eyes and fontanelles fast pulse anuria very dry mouth
what are features of severe dehydration (15%)
unconscious mottled skin fast and thready pulse anuria hypotension tachypnoea coma
approx how much sodium is required per day
100- 150 mmol / day
approx how much potassium is required per day
30- 60 mmol/ day
how much sodium does one liter of saline contain
150 mml
what should you consider when prescribing fluids
hypo/hypervolaemic? fluid intake? fluid losses? what kind of fluid? iso/hyper/hypotonic what rate and volume of fluids