What Is The 421 Rule?

What are maintenance IV fluids?

Maintenance IV fluids are appropriate for euvolemic medical and surgical patients who cannot take adequate enteral fluids.

“Maintenance” = volume of fluid required to meet daily metabolic needs, such as normal water and electrolyte losses, and maintain homeostasis..

How do you calculate ideal body weight?

Ideal body weight is computed in men as 50 + (0.91 × [height in centimeters − 152.4]) and in women as 45.5 + (0.91 × [height in centimeters − 152.4]). A simple alternative would be to compute ideal body weight as the weight corresponding to an ideal body mass index of 22 kg/m2.

How do you calculate percentage of dehydration?

This is calculated by dividing the difference between the pre-illness and illness weights by the pre-illness weight, then multiplying by 100 (Table 5). For example, a 10-kg patient who has lost 1 kg is 10% dehydrated. Every 1 kg of weight lost is equivalent to 1 L of fluid loss.

How do you calculate maintenance fluids?

The 24-hour number is often divided into approximate hourly rates for convenience, leading to the “4-2-1” formula.100 ml/kg/24-hours = 4 ml/kg/hr for the 1st 10 kg.50 ml/kg/24-hours = 2 ml/kg/hr for the 2nd 10 kg.20 ml/kg/24-hours = 1 ml/kg/hr for the remainder.

How do you calculate pediatric fluids?

For infants 3.5 to 10 kg the daily fluid requirement is 100 mL/kg.For children 11-20 kg the daily fluid requirement is 1000 mL + 50 mL/kg for every kg over 10.For children >20 kg the daily fluid requirement is 1500 mL + 20 mL/kg for every kg over 20, up to a maximum of 2400 mL daily.More items…

What is Holliday Segar formula?

The Holliday/Segar formula of 100 ml/kg body weight (BW) for the first 10 kg; 1,000 ml plus 50 ml/kg BW for each kilogram between 11 kg and 20 kg, and 1,500 ml plus 20 ml/kg BW for each kilogram above 20 kg, or another commonly used formula of 1,600 ml/m2 body surface area per day, is used throughout the world.

How much IV fluid is given for dehydration?

Initial management includes placement of an intravenous or intraosseous line and rapid administration of 20 mL/kg of an isotonic crystalloid (eg, lactated Ringer solution, 0.9% sodium chloride). Additional fluid boluses may be required depending on the severity of the dehydration.

What is Young’s rule formula?

[Age / (Age + 12)] x Recommended Adult Dose = Pediatric Dose Young’s Rule can be applied to quickly approach a situation in which the patient’s weight is unknown.

What happens if dehydration is left untreated?

If left untreated, severe dehydration can be serious and cause fits (seizures), brain damage and death.