Why do different injections go in different parts of the body?

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Why do different injections go in different parts of the body?

In: Biology

Different routes absorb at different rates is the primary reason. Where you want the medication to go is another. You can push a smaller amount of a medication through a vein and have it take affect quickly or you can push a large dose into a muscle and have it start working over time. Also, you might be injecting a medication like lidocaine to numb a specific location; lidocaine in the veins is done to treat certain heart conditions and could be fatal otherwise.

Some drugs work best when they’re injected just under the skin, others when they’re inside a muscle, and others need to be in your bloodstream.

Some parts of your body make it easier to hit each of those things. For instance, your arm for blood veins, your stomach for under the skin, and your rear end for muscles.

Sometimes a doctor will use a certain spot because that’s what he’s used to, and sometimes if you ask, they might be willing to use a different one.

It depends on the drug and desired rate of absorption into the body..IV based medications go directly into the blood stream, generally used for medications where you want the drug to act almost instantly (think Propofol, used to put you to sleep)…Subcutaneous types of injections go directly under the skin (like Insulin)…This type of injection is slow acting because there are very few blood vessels in that layer of skin and therefore allows a slower rate of absorption..Then you have intramuscular injections which go directly into the muscle..There are more blood vessels in the muscles and allow for a faster absorption rate..However, not every drug is able to be taken via IV, just like not every drug is able to be used as a subcutaneous injection…There are other types of injections, but the idea is the same!

There are a lot of factors that can go into this. The biggest factors are how many blood vessels the area has, the amount of the drug, the and the materials used to make the drug.

If the amount of drug being injected is small enough, it doesn’t matter which area you inject into, as long as it’s one of the preferable areas, like the butt, shoulder, thigh, etc. If it’s on the bigger side, then it will have to go into the butt, which has the most vessels and has the biggest mass of any muscle. If it’s too big, then it will have to be inject into a vein (IV) instead of a straight injection.

On the other hand, if the drug is meant to be slowly absorbed, then it may be injected into the arm or some other area where the vessels are used slightly less.

And of course, if the materials are dangerous in one area, then another method will be used. For example, if a preservative is dangerous if injected into a muscle, then it will be injected into a vein instead.

Hope this helps!

Mostly depends on if you are trying to inject in veins, muscles or just under the skin.

Veins have a lot of places to choose from, which is good because not everyone’s veins are easy to hit in all the places they like go go for veins, like the inside of the arm and the back of the hand.

For muscles, mostly they like the one on your shoulder because it’s easy to get at without you taking off your clothes, but your thighs are also good and are the prefered place if you have to inject yourself.

For under the skin, that’s when they pinch your shoulder skin to make sure they don’t hit the muscle, but if you do it yourself, your tummy is a great place to not hit muscle and you can even keep your pants on, but if you inject often you can switch things up and also pinch your thigh up same as the arm.

If it’s in your butt, that’s a muscle one, and unless you are a small child, you are probably getting haldol. It’s the best place to do intramuscular when you can’t get the person to STAY STILL.