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25 lip 2023 · Insensible fluid loss is the amount of body fluid lost daily that is not easily measured, from the respiratory system, skin, and water in the excreted stool. The exact amount is unmeasurable but is estimated to be between 40 to 800mL/day in the average adult without comorbidities. [2]
22 paź 2023 · Sensible losses pertain to conventional forms of excretion, such as urination and defecation, whereas insensible losses pertain to less obvious fluid expenditure, including sweating and respiratory evaporation.
KEY POINT: This is loss of pure water: there is no associated solute loss. This solute-free water loss differs from sweating as sweat contains solutes. Insensible loss is different from sweating. Insensible loss from the skin cannot be eliminated. Daily loss is about 400 mls in an adult.
Insensible loss: 600–900 mL (lungs and skin). (With fever, each degree above 98.6°F [37°C] adds 2.5 mL/kg/d to insensible losses; insensible losses are decreased if a patient is undergoing mechanical ventilation; free water gain can occur from humidified ventilation.)
A suggestion is put forward regarding a simplified formula for estimating insensible water loss in adult patients, based on information currently available in the literature. The nature, magnitude and factors influencing insensible water loss are discussed.
Sensible perspiration during fever augments water loss, but not all of it is free water. The osmolarity of sweat is about one quarter that of plasma, due to the presence of sodium and potassium
Insensible fluid loss is the amount of body fluid lost daily that is not easily measured, from the respiratory system, skin, and water in the excreted stool. The exact amount is unmeasurable but is estimated to be between 40 to 800mL/day in the average adult without comorbidities. [2]
