# What is the adrogue formula?

## What is the adrogue formula?

The Adrogue–Madias formula23 (formula 4 in Table 2), which calculates the predicted change in [Na] after infusion of 1 L of saline, accounts for the major factors that determine the changes in [Na] after the addition of saline to a closed system (initial [Na] and body water plus sodium concentration and volume of the …

## How is Hypernatremia correction calculated?

The first step in treating hypernatremia is estimating the water deficit.

1. Water deficit = Current Total Body water x { ( Serum [Na] ÷ 140 ) – 1}
2. Total body water (TBW) = 60% (0.6) of body weight for men, 50% (0.5) of body weight for women, 45% (0.45) of body weight for elderly.

How do you calculate sodium replacement in hyponatremia?

Formula for Sodium Correction

1. Fluid rate (mL / hour) = [(1000) * (rate of sodium correction in mmol / L / hr)] / (change in serum sodium)
2. Change in serum sodium = (preferred fluid selected sodium concentration – serum sodium concentration) / (total body water + 1)

How do you calculate total body water deficit?

Background: The water-deficit equation {WD(1) = 0.6 × B(m) × [1 – (140 ÷ Na(+))]; B(m) denotes body mass} is used in medicine and nutrition to estimate the volume (L) of water required to correct dehydration during the initial stages of fluid-replacement therapy.

### How do you calculate fluid deficit in hypernatremia?

Abstract. Background: The water-deficit equation {WD(1) = 0.6 × B(m) × [1 – (140 ÷ Na(+))]; B(m) denotes body mass} is used in medicine and nutrition to estimate the volume (L) of water required to correct dehydration during the initial stages of fluid-replacement therapy.

### Why is d5 given for hypernatremia?

In patients with hypernatremia of longer or unknown duration, reducing the sodium concentration more slowly is prudent. Patients should be given intravenous 5% dextrose for acute hypernatremia or half-normal saline (0.45% sodium chloride) for chronic hypernatremia if unable to tolerate oral water.

How do you calculate sodium concentration?

The serum sodium concentration is determined by the amount of sodium and potassium dissolved in body fluids, and by the volume of body water: Serum [ Na ] = Total body soluble ( Na + K) Total body water . 