# What is the formula for infusion time?

## What is the formula for infusion time?

infusion time (hr) = total volume (mL) ÷ flow rate (mL/hr)

## How do you calculate infusion rate?

If you simply need to figure out the mL per hour to infuse, take the total volume in mL, divided by the total time in hours, to equal the mL per hour. For example, if you have 1,000 mL NS to infuse over 8 hours, take 1,000 divided by 8, to equal 125 mL/hr.

**How do you make a drug infusion?**

- Preparation: 1 ampoule 1ml (1:1000 = 1mg / ml) Dilute 3.0 mg (3mls) of Adrenaline with 47 mls of Normal Saline in 50 mls syringe.
- Dose: 1 – 10 mcg/min (starting infusion rate 0.1 mcg/kg/min) Titrate accordingly to desired BP – (Infusion range 0.1-2.0mcg/kg/min ie for 50kg patient start with 5ml/h)
- Calculations:

**How do you calculate gallons per minute?**

The formula to find GPM is 60 divided by the seconds it takes to fill a one gallon container (60 / seconds = GPM). Example: The one gallon container fills in 5 seconds. 60 / 5 = 12 GPM. (60 divided by 5 equals 12 gallons per minute.)

### How do you calculate IV IV infusion rate?

IV Infusion Rate (cc/hr) = dose (mcg/kg/min) x weight (kg) x 60 min/hr concentration (mg/cc) x 1000 mcg/mg DISCLAIMER: All calculations must be confirmed before use.

### What is the flow rate of an infusion?

An infusion is therefore administered at a flow rate that will give the required dosage per hour or minute for the patient. Generally, clinical areas will have standardised infusion strengths that are always used for specific medications, with the rate varied according to the prescribed dose for that patient.

**How do I calculate my patient’s drug dosage?**

Follow these four steps to easily calculate your patient’s accurate drug dosage. Find out what’s in your I.V. bottle (drug concentration or number of mL of fluid). Determine in which units your drug is measured (units/hour, mg/hour, or mcg/kg/minute).

**How do you set the dose of an infusion?**

We would therefore set the infusion rate as 22.5ml/hour (22.5mg/1, where 1 is the strength of the dosage in ml/mg). Other complex calculations can give the prescribing dose for dose/kg/min.