<unk>  fluid loss is defined as fluid that is lost through perspiration and as<unk>  vapour in expired air. This is part of the body's temperature control mechanism and is termed<unk>  loss": it cannot be easily measured. Some sources say it accounts for a daily loss 500 to 650 milliliters of<unk> , while other sources put the minimum value at 800 ml.
Insensible water loss
Bladder outlet obstruction
Hypokalemic sensory overstimulation
Dehydration
Renal compensation
Adrenal fatigue
Respiratory losses
Pancreatic insufficiency