## How do you calculate maintenance IV fluids?

## How do you calculate maintenance IV fluids?

Maintenance Fluid Rate is calculated based on weight.

- 4 mL / kg / hour for the first 10kg of body mass.
- 2 mL / kg / hour for the second 10kg of body mass (11kg – 20kg)
- 1 mL / kg / hour for any kilogram of body mass above 20kg (> 20kg)

**What is the 4 2 1 rule for maintenance fluids?**

In anesthetic practice, this formula has been further simplified, with the hourly requirement referred to as the “4-2-1 rule” (4 mL/kg/hr for the first 10 kg of weight, 2 mL/kg/hr for the next 10 kg, and 1 mL/kg/hr for each kilogram thereafter.

**What do you use for maintenance fluids?**

Isotonic crystalloids Mixed isotonic solutions (i.e., containing glucose) are preferred as maintenance fluids (see “Mixed crystalloid solutions”).

### What would the rate of maintenance fluid be for a 25 kg child?

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.

**What are maintenance IV fluids?**

Intravenous fluids may be required as a bolus infusion for resuscitation or as a continuous infusion when sufficient fluids cannot be ingested orally. The goal of maintenance intravenous fluids is to preserve the extracellular volume while maintaining a normal electrolyte balance.

**How do you calculate fluid deficit maintenance?**

The first step is to calculate the fluid deficit. This is determined by multiplying the percentage dehydration times the patient’s weight (e.g. 10% dehydration in a 10 kg child: 10% of 10 Kg = 1 kg = 1 liter). Subtract any boluses from this volume (e.g. 1 liter – 400 ml of boluses = 600 ml).

#### When do you use the 421 rule?

Traditionally, the first step in determining the hourly fluid requirements for a child described by Holliday and Segar and coined as the “4/2/1” rule: For children < 10 kg their hourly fluid needs are body weight (kg) x 4. For children 10-20 kg, their hourly fluid needs are 40 ml + (BW – 10 kg) x 2 .

**What is a maintenance fluid?**

Maintenance fluid therapy as defined by Holliday and Segar is a water and electrolyte prescription designed to replace anticipated water and electrolyte losses over the ensuing 24-hour period in primarily euvolemic children [4].

**What is the 24 hour fluid requirement for a child weighing 32 kg?**

Pediatric patients have weight-based minimum fluid intake requirements….Pediatric Fluid Management.

Weight | Minimum fluid intake per hour | Minimum fluid intake per shift |
---|---|---|

6 kg | 24 cc/hour | 192 cc/shift |

7 kg | 28 cc/hour | 224 cc/shift |

8 kg | 32 cc/hour | 256 cc/shift |

## Is normal saline a maintenance fluid?

Normal Saline (0.9% NaCl) has 154 mEq/L of NaCl. Therefore, D5 0.2 NS with 20 mEq of KCl per liter is an appropriate maintenance fluid for all people.