What is the formula for calculating the infusion rate?

There are three formulas for calculating infusion:1. Input volume per hour (ml) = 4 drops per minute

2. The number of drops per minute (gtt min) = the total number of ml of fluid input [the total infusion time (h) 4];

3. Time required for infusion (h) = total ml of fluid input (4 drops per minute).

Infusion, or large-volume injection, refers to a large dose of injection injected into the body by intravenous drip, and is administered at a time of more than 100ml. It is a branch of injectables that is usually packaged in glass or plastic infusion bottles or bags and does not contain bacteriostatic agents. The drip rate is adjusted through the infusion set during use, and the drug is continuously and steadily injected into the body.

Knowing the total amount of fluid input and the estimated time to finish, find the number of drops per minute

Number of drops per minute = total amount of fluid Drip coefficient Time taken for infusion.

For example, a patient needs to be transfused with 1500 ml of fluid, which is scheduled to be completed in 10 hours. The infusion set is known to have a drip coefficient of 20, and the number of drops per minute is calculated.

The known amount of this question is the total amount of liquid input and the estimated time to be infusion, and if the number of drops per minute is required to be calculated, then apply Equation 1 to calculate the result as follows: Drops per minute = total amount of liquid Drip coefficient Time taken for infusion.

Drops per minute = 1500 20 (10 60) = 50 drops.

Classification and quality requirements.

Classification and clinical use of infusion: electrolyte infusion is used to replenish water and electrolytes in the body, correct the acid-base balance in the body, etc. Such as sodium chloride injection, compound sodium chloride injection, sodium lactate injection, etc.

Nutrient infusions are used in patients who are unable to absorb nutrients orally. Nutritional infusion includes sugar infusion, amino acid infusion, fat emulsion infusion, etc. The most commonly used sugar infusion is glucose injection. Amino acid infusion and fat emulsion infusion will be discussed later.

The three formulas for calculating infusion are:

1. If the drop coefficient is 10 drops ml, then: the number of ml (drop number min) entered per hour is 6.

3. If the drop coefficient is 20 ml, then: the number of ml (drop min) entered per hour is 3.

The drop coefficient of each infusion set is fixed, so if any variable between the number of milliliters per hour and the number of drops per minute is known, the other variable can be obtained by using the above three formulas. There are three types of infusion set drop coefficient commonly used in clinical practice in China, according to the drop coefficient of the infusion set, the following formula can be inferred, the number of ml (ml h) (drop min) per hour (drop min) 60 (min h) drop coefficient (drop ml).

When giving infusions to patients, pay attention to:

1) Strictly implement the check system and the principle of aseptic operation.

2) The choice of operating veins is coarse, straight, flexible, relatively fixed, and avoids joints and venous valves.

3) Pay attention to the compatibility and contraindications of drugs.

4) Ensure that the needle is in the blood vessel before the drug can be injected, so as not to cause tissue damage and increase the pain of the patient.

5) Adjust the infusion speed according to the age of the disease, the nature of the drug.

6) Strengthen patrols during the infusion process, patiently listen to patients' complaints, and deal with infusion failures and infusion reactions in a timely manner.

7) For those who have been continuously infusion for more than 24 hours, the infusion set or infusion bottle must be changed every day.

8) Before infusion, pay attention to draining the air in the infusion tube and needle.

The formula is as follows:

Inputs per hour (ml) = 4 drops per minute

Number of drops per minute (gtt min) = total ml of fluid infusion Total time of infusion (h) 4].

Time required for infusion (h) = total ml of fluid infusion (4 drops per minute).

There are three types of drip coefficients of infusion sets commonly used in clinical practice in China, and the following formula can be inferred according to the drip coefficient of infusion sets:

Number of milliliters entered per hour (ml h) (drop min) 60 min h) drop coefficient (drop ml).

Therefore, when the drop coefficient is drop ml, substituting the above formula respectively can be obtained:

1. If the drop coefficient is 10 drops ml, then: the number of ml (drop number min) entered per hour is 6.

2. If the drop coefficient is 15 ml, then: the number of ml (drop min) entered per hour is 4.

3. If the drop coefficient is 20 ml, then: the number of ml (drop min) entered per hour is 3.

The drop coefficient of each infusion set is fixed, so when any variable between the number of milliliters per hour and the number of drops per minute is known, the other variable can be obtained by using the above three formulas.

Equation 1: Knowing the total amount of input liquid and the estimated time to finish the infusion, find the number of drops per minute

Number of drops per minute = total amount of fluid Drip coefficient Time taken for infusion.

For example, a patient needs to be transfused with 1500 ml of fluid, which is scheduled to be completed in 10 hours. The infusion set is known to have a drip coefficient of 20, and the number of drops per minute is calculated.

The known amount of this question is the total amount of liquid input and the estimated time to be infusion, and if the number of drops per minute is required to be calculated, then apply Equation 1 to calculate the result as follows: Drops per minute = total amount of liquid Drip coefficient Time taken for infusion.

Drops per minute = 1500 20 (10 60) = 50 drops.

Time taken for infusion (h) = total amount of fluid infusion drip coefficient (60 drops per minute) or: time taken for infusion (min) = total amount of fluid drip coefficient number of drops per minute.

A patient started a fluid infusion at 10:00 a.m. and asked for 40 drops. It is known that the infusion coefficient of the infusion set is 20, and it is a few points to ask the patient to input 1000ml of liquid.

The known amount of this question is the total amount of liquid input and the number of drops per minute, and it is required to calculate the estimated time to finish the infusion. Then apply Equation 2 to calculate the result as follows:

Time taken for infusion (h) = total amount of fluid drip coefficient (60 drops per minute).

Time taken for infusion (h) = 1000 20 (40 60) or time taken for infusion (min) = total amount of fluid, drip coefficient Number of drops per minute.

Time taken for infusion (min) = 1000 20 40 = 500min

It takes about an hour for the patient to inject 1000ml of fluid, i.e. 18:18 p.m.

Effects of too fast infusion:

Usually the correct infusion speed of the general drug is 40-60 drops in minutes.

If the speed is too fast, it means that we quickly inject the liquid into the middle of the cycle, so the amount of blood in his circulation increases rapidly.

After the increase, the patient may have a heavy heart load and circulatory overload, so the patient may have chest tightness, cough, and even cough up some pink frothy sputum.

This is a very typical manifestation of acute pulmonary edema, which we call circulatory overload.

The unit of 500 is milliliters, to 60 drops in minutes, then it is necessary to know how many milliliters each drop is, then: the number of minutes required = 500 (60 * how many milliliters per drop).

Inputs per hour (ml) = 4 drops per minute

Number of drops per minute (gtt min) = total ml of fluid infusion Total time of infusion (h) 4].

Time required for infusion (h) = total ml of fluid infusion (4 drops per minute).

Preparation of infusions

Fresh water for injection should be used for the preparation, and high-quality raw materials for injection should be used as raw materials. According to the quality of the raw materials, the dilute blending method and the concentration blending method are used respectively, and the operation method is the same as that of the injection.

Thinning method. When the quality of raw materials is good, the concentration of liquid medicine is not high, and the amount of liquid is not too large, the dilute mixing method can be used. After the required concentration is prepared, the pH can be adjusted, and the activated carbon added if necessary is stirred, and filtered after about 30 minutes. This method generally does not require heating.

Thick blending. The preparation of liquid medicine is mostly made by the concentration method, and the method is the same as that of injection. In mass production, heating and dissolving can shorten the operation time and reduce the chance of contamination, and the concentration method can filter out impurities with low solubility.

Inputs per hour (ml) = 4 drops per minute

Number of drops per minute (gtt min) = total ml of fluid infusion Total time of infusion (h) 4].

Time required for infusion (h) = total ml of fluid infusion (4 drops per minute).

Calculation of infusion rate.

Inputs per hour (ml) = 4 drops per minute

Number of drops per minute (gtt min) = total ml of fluid infusion Total time of infusion (h) 4].

Time required for infusion (h) = total ml of fluid infusion (4 drops per minute).

I think it should be calculated like this: (500*15) (60*60)=7500 3600=hours.

The number of milliliters (ml h) (drop min) (drop min) 60 min h) (drop ml) drop coefficient (drop ml), so when the drop coefficient is drop ml, substitute the above formula respectively

1. If the drop coefficient is 10 drops ml, then: the number of ml (drop number min) entered per hour is 6.

2. If the drop coefficient is 15 ml, then: the number of ml (drop min) entered per hour is 4.

3. The drop coefficient is 20 drops ml, then: the number of milliliters (drops min) entered per hour 3, the drop coefficient of each infusion set is fixed, so when any variable between the number of milliliters entered per hour and the number of drops per minute is known, another variable can be obtained by using the above three formulas.

There are three types of infusion set drop coefficient commonly used in clinical practice in China, according to the drop coefficient of the infusion set, the following formula can be inferred, the number of ml (ml h) (drop min) per hour (drop min) 60 (min h) drop coefficient (drop ml).

Therefore, when the drop coefficient is drop ml, substituting the above formula respectively can be obtained:

1. If the drop coefficient is 10 drops ml, then: the number of ml (drop number min) entered per hour is 6.

2. If the drop coefficient is 15 ml, then: the number of ml (drop min) entered per hour is 4.

3. The drop coefficient is 20 ml, then: the number of milliliters entered per hour (number of drops min) 3, the drop coefficient of each infusion set is fixed, so any variable between the number of milliliters and the number of drops per minute is known, and another variable can be obtained by using the above three formulas.