Insulin Site Rotation - An Overview

Introduction:

Insulin injections are to be given at different sites. Site rotation for insulin injection is important to avoid insulin injection site complications, such as buildup of fatty tissue, tissue damage, or lumps formation. The accumulation of fatty tissue may modify how fast insulin is absorbed from the skin. This further affects blood sugar levels in the body, especially in people suffering from type 1 diabetes (a condition in which the pancreas produces less or no insulin). Following a regular pattern of insulin site rotation is important for insulin absorption. Therefore, it is better to use one area of the body for the morning insulin shot and another for the evening shot. Thus, the article discusses insulin site rotation in detail and how it can be done effectively to manage type 1 diabetes.

What Is Insulin?

Insulin is a natural hormone produced in the body and helps regulate blood glucose levels. The pancreas secretes it. It helps the body convert glucose into energy. Insulin plays a major role in allowing the insulin to enter the cells. If the pancreas does not secrete the required insulin, it may increase blood sugar (glucose) levels.

Apart from natural insulin, manufactured insulin is also available. Those with type 1 diabetes usually require regular insulin dosage to manage the condition.

Insulin Injection Methods

Insulin can be taken through different methods, such as syringes, plastic prefilled insulin pens, jet injectors, and insulin pumps. The insulin injection methods or techniques are usually decided by the healthcare provider depending on the patient's medical condition and insulin needs. However, among all these methods, a syringe for insulin injection is one of the most common and least expensive insulin delivery methods. These are for single use only and vary based on the amounts of insulin holding capacity and the needle size.

Where to Inject Insulin?

Insulin is injected into the body's areas containing body fat or adipose tissue (subcutaneously) to manage type 1 diabetes. The common sites or best places to inject insulin are as follows:

• Belly: Around two inches (five centimeters) from the belly button.

• Thighs: The front and side of the thighs.

• Arms: The back of the upper arms.

• Buttocks: Upper part of buttocks.

How to Inject Insulin?

One should keep the following things in mind to know how to inject insulin:

• The quality of the insulin should be checked.

• The insulin should attain room temperature before being injected.

• Insulin injection contents should be rolled between the hands. It should not be shaken.

• It should not be used if the contents appear grainy, thickened, or discolored.

The Steps Involved in Safe Insulin Injection Include:

• Gather all the supplies needed for injection, such as injection vials, syringes, needles, gauze, alcohol pads, bandages, and puncture proof-bod for disposing of needles safely.

• One must wash hands after collecting all the supplies and before starting the insulin administration.

• The syringe should be held in the upright position, and the plunger should be pulled up to the level (measurement) equal to the dose of insulin to be injected.

• Next, remove the cap from the needle and the vial (clean the vial top or stopper if it has been already used before with an alcohol swab). Then put the needle inside the stopper, and pull the plunger down to fill the insulin dose needle into the syringe.

• Now, turn the vial upside down, and push the plunger until it reaches the exact dose level on the injection syringe. In case there are bubbles present in the syringe, push the plunger into the vial to remove bubbles, and then pull back again to fill the syringe up to the required level for the insulin dose.

• Then, clean the injection site with an alcohol swab and wait for a few minutes before needle insertion. The needle insertion should be inserted by pinching the skin one to two inches to avoid inserting into the muscle.

• The needle should be inserted at a 90-degree angle, and then the plunger should be pushed downwards.

• After pushing the plunger down, release the pinched skin and rub the injection site. In case of minor bleeding occurs, apply pressure with a gauze or cover with a bandage if needed.

Insulin Absorption

Insulin plays a very important role in type 1 diabetes management. The insulin gets absorbed in the body at different speeds based on the site of injection, type of insulin, and the person’s lifestyle.

• Injection Site: The injection site makes a big difference in insulin absorption and effectiveness. These include insulin getting absorbed.

  • More quickly through the abdomen.

  • A bit slower from the arms.

  • More slowly from the legs.

  • Most slowly from the buttock.

• Type of Insulin: Apart from the injection site, different types of insulin are also absorbed differently. Rapid-acting insulin gets absorbed instantly if administered after meals, while long-acting insulin works within a few hours and may last a day. Some other types work within 15 minutes and produce effects for about two hours. Therefore, one can prefer long-acting insulin in the buttocks and rapid-acting insulin in the abdomen.

• Lifestyle: Physical activity, such as a workout or normal exercise, also affects the rate of insulin absorption (increases) in the body. Therefore, one should plan injections accordingly. Also, if one has taken an insulin shot, they must wait for at least 45 minutes before or after the injection and then indulge in the exercise of that body part.

Monitoring Blood Sugar Levels

Monitoring the blood sugar (glucose) levels regularly is important to manage type 1 diabetes and keep the blood sugar of a person in control. This guides the person in administering insulin and/or consuming carbohydrates when required. One may use a continuous glucose monitor or CGM to measure blood sugar levels throughout the day. A person can also consult a healthcare provider if they experience difficulty maintaining blood sugar levels within limits.

Two Methods for Choosing and Rotating Insulin Site

• Method 1: Draw an imaginary clock at the belly button. Rotate the site from 12 o’clock and move it clockwise to three, six o’clock, and so on.

• Method 2: Draw the imaginary letters M and W on the body part. Each point on the letter can be considered for the injection site at any time. Injections are done in a pattern to avoid using the same site repeatedly. The sites should be up to one inch apart. It can be done straight or in rows about an inch apart. If a pattern is followed, the repetition of the injection sites can be avoided.

Some individuals may develop favorite sites for injections. If a small area is often used, it may lead to the development of lipohypertrophy. This condition exhibits large bumps that affect the absorption of insulin. If the affected areas are due to repeated sites, scars and bumps may disappear if left for about two to three months.

Conclusion:

Insulin injections are essential to manage type 1 diabetes if the body cannot produce natural insulin for the blood glucose (sugar) to enter the cells. There are different insulin injection sites, such as thighs, abdomen, upper arm, and buttocks, where insulin can be administered. The doctor usually advises rotating the injection site regularly as there are disadvantages to using the same site for insulin injections. This helps avoid the complications of using the same site often. Thus, one can ask their healthcare provider about the advantages and disadvantages of site rotation and its impact on the insulin used to manage type 1 diabetes.