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K deficit (in mmol) = (K normal lower limit − K measured) × body weight (kg) × 0.4 Meanwhile, the daily body requirement of potassium is calculated by multiplying 1 mmol to body weight in kilograms. Adding potassium deficit and daily potassium requirement would give the total amount of potassium need to be corrected in mmol.
The Holliday-Segar formula is a formula to help approximate water and caloric loss (and therefore the water requirements) using a patient's body weight. [1] Primarily aimed at pediatric patients, the Holliday-Segar formula is the most commonly used estimate of daily caloric requirements. [2]
Inadequate replacement of potassium losses during diarrhea can lead to potassium depletion and hypokalaemia (low serum potassium) especially in children with malnutrition. This can potentially cause muscle weakness, impaired kidney function, and cardiac arrhythmia.
Potassium resides mainly inside the cells of the body, so its concentration in the blood can range anywhere from 3.5 mEq/L to 5 mEq/L. [14] The kidneys are responsible for excreting the majority of potassium from the body. [14] This means their function is crucial for maintaining a proper balance of potassium in the blood stream.
The trans-tubular potassium gradient (TTKG) is an index reflecting the conservation of potassium in the cortical collecting ducts (CCD) of the kidneys. It is useful in diagnosing the causes of hyperkalemia or hypokalemia. [1] [2] The TTKG estimates the ratio of potassium in the lumen of the CCD to that in the peritubular capillaries.
In children, one calculation used for insensible fluid loss is 400 ml/m 2 body surface area. In addition, an adult loses approximately 100 ml/day of fluid through feces. [12] [16] For females, an additional 50 ml/day is lost through vaginal secretions. These outputs are in balance with the input of ~2500 ml/day. [12]
Potassium deficiency has two different contexts: For the medical condition in humans, see hypokalemia; Potassium deficiency (plants), the disorder in plants
Mineral deficiency is a lack of the dietary minerals, the micronutrients that are needed for an organism's proper health. [1] The cause may be a poor diet, impaired uptake of the minerals that are consumed, or a dysfunction in the organism's use of the mineral after it is absorbed.