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The volume of rehydration fluids required is determined by reassessing hydration parameters after resuscitation, using the following formula: % dehydration × body wt (kg) × total body water (0.6). This volume is commonly administered throughout 4–12 hours with standard isotonic, balanced electrolyte replacement fluids.

## How do you calculate IV fluids?

The formula to calculate how many hours will it take for the IV to complete before it runs out is: **Time (hours) = Volume (mL) Drip Rate (mL/hour)** . The volume of the fluid is 1 000 mL and the IV pump set at 62 mL/hour.

## How do vets calculate ongoing fluid losses?

As an example, the daily fluid needs of a 5-kg patient that is estimated to be 6% dehydrated (to be corrected over 24 hours) and has estimated ongoing losses of 1 mL/kg per hour can be calculated as follows: Dehydration deficit: **5 kg × 0.06 = 0.3 L × 1000** = 300 mL to be corrected over 24 hours (300 mL/24 h) = 12.5 mL/h.

## How many drops is 100 ml per hour?

Reference Chart of Drops per Minute

IV Tubing Drop Factor | Desired Hourly Rate: ML / HR | |

20 |
100 | |
---|---|---|

10 DROP/ML | 3 | 16 |

15 DROP/ML | 5 | 25 |

20 DROP/ML | 6 | 32 |

## What is 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 .

## How much IV fluid can you give a dog?

Initial rapid infusion for dogs should be 20 to 40 ml/kg IV (one half this amount for cats) for 15 minutes, followed by **70 to 90 ml/kg** (dogs) or 30 to 50 ml/kg (cats) administered over one hour.

## How long can a dog stay on IV fluids?

Efficacy of Fluid Therapy in Dogs

Fluid therapy can achieve adequate resuscitation rapidly and the retained fluid can aid in intravascular expansions for **up to 12 hours** (colloids).

## Can I give my dog IV fluids at home?

Administering supplemental fluids can benefit dogs with a variety of medical conditions. Most commonly, home fluid therapy is recommended for dogs with **kidney disease** or chronic kidney disease (also known as chronic renal failure).

## How do vets calculate dehydration rate?

Fluid deficit: • If present, the fluid deficit needs to be calculated and this can be done by estimating the percentage dehydration: • e.g. A 35kg dog that is estimated to be 8% dehydrated • Percentage dehydration is estimated to be 8% of the body weight and then this is converted into fluid units: • e.g. 35kg x 0.08 = …

## How do vets calculate fluid rates?

To calculate the patient’s fluid deficit, the veterinarian will **multiply the patient’s body weight (lb) by the percent dehydration as a decimal and then multiply it by 500**. The result of this calculation is the amount of fluid a patient needs to become rehydrated if there are no ongoing losses.

## How do you calculate replacement for fluid loss?

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).