Top Fitness Fragen

How deep should intramuscular injection needles be?

A 1–1½” needle is recommended in women weighing 152–200 lbs (70–90 kg) and men weighing 152–260 lbs (70–118 kg). A 1½” needle is recommended in women weighing more than 200 lbs (90 kg) or men weighing more than 260 lbs (118 kg). Use a needle long enough to reach deep into the muscle.

How deep should an IM injection go?

Identify the injection site.



The injection site will be approximately 2 inches below the bone and above the axillary fold/armpit.

How far do you insert needle for intramuscular injection?

The needle should be long enough to reach the muscle without penetrating the nerves and blood vessels underneath. Generally, needles should be 1 inch to 1.5 inches for an adult and will be smaller for a child.

How long should an intramuscular needle be?

Intramuscular (IM) injections



Needle length is usually 1″–1½”, 22–25 gauge, but a longer or shorter needle may be needed depending on the patient’s weight.

Do you pinch the skin for an IM injection?

Needle insertion



Insert needle at an 45o angle to the skin. Pinch up on SQ tissue to prevent injecting into muscle. Aspiration before injection is not required. Multiple injections given in the same extremity should be separated as far as possible (preferably at least 1” apart).

What happens if you give an IM injection too high?

One of the most common errors in IM injection is introducing the needle either too high on the shoulder or too low on the arm. Injections given too high (into the shoulder joint) or too low (into tendons and soft tissue) have the possibility of leading to serious shoulder or arm pain that can last several months.

How far below skin is muscle?

Average depth from skin to muscle was ~1.2cm.

How do you give a painless IM injection?

Hold the skin around where you will give the injection: With your free hand, gently press on and pull the skin so that it is slightly tight. Insert the needle into the muscle: Hold the syringe barrel tightly and use your wrist to inject the needle through the skin and into the muscle at a 90 degree angle.

What is the best site for intramuscular injections?

A ventrogluteal site is the most commonly used and recommended site for IM injections in adults and children of walking age because of the large muscle mass. This site is located away from the superior and inferior gluteal arteries as well as the sciatic and superior gluteal nerves,9 and is also the least painful.

How long is the needle for Covid vaccine?

The kits provide 1 mL, 3 mL, or 5 mL syringes and needles that range from 22 to 25 gauge and needles that are 1 to 1.5 inches in length. Administration should be performed using the 1 mL syringes whenever possible. The 3 mL and 5 mL syringes should be used for diluting the Pfizer-BioNTech COVID-19 vaccine only.

Why is it important to consider the needle length when giving a vaccine intramuscularly?

For IM and SC injections, the needle needs to be sufficiently long to ensure that the vaccine is injected into the muscle or deep into subcutaneous tissue. Studies have shown that the use of 25mm needles can reduce local vaccine reactogenicity (Diggle et al., 2000, Diggle et al., 2006).

What happens if you don’t aspirate when giving an IM injection?


Quote from video: We are not injecting them directly into somebody's blood vessels they are going into a muscle. The infectious diseases society of america states that the world health organization. And the cdc.

Do you massage after intramuscular injection?

Some medication manufacturers advise against massaging the site after injection, as it reduces the effect and intention of the medication by dispersing it too readily or over too large an area. Manufacturers’ recommendations should be checked. any other signs of reaction to the medication are present.

How do you know if you hit a nerve when injecting?

Unlike some veins, nerves are not visible from outside the body, although you will definitely know if you’ve hit one while injecting because you’ll experience extreme pain and no blood will enter the syringe when you pull back to register. You may feel an electric “burn” along your limb.

Where do you give an IM injection in the deltoid?

Give in the central and thickest portion of the deltoid muscle – above the level of the armpit and approximately 2–3 fingerbreadths (~2″) below the acromion process. See the diagram. To avoid causing an injury, do not inject too high (near the acromion process) or too low.

Why does the muscle twitch when giving an IM injection?

Muscle relaxation reduces pain,[24] as when the needle entrance is associated with pain, the patient will unconsciously spasm the muscle and will feel the injection of the drug in the muscle more.

Why are intramuscular injections so painful?

Pain arising from this kind of injection generally arises from leakage of the medication and from damage to the subcutaneous tissue [3]. Excessive fatty tissue causes the medication not to be absorbed completely, and this causes more pain.

Where do injections hurt the least?

Subcutaneous injections tend to be less painful than intramuscular injections because the needles are smaller and do not have to push through as much tissue.

How deep is muscle under the skin?

Variability of distance between skin and muscle exists within the literature. In 2008, a study measured thickness of subcutaneous fat tissue and muscle in 100 children aged two months to six years using magnetic resonance imaging (MRI) and computed tomography (CT). Average depth from skin to muscle was ~1.2cm.

How do you know if you hit a blood vessel while injecting?

Quickly jab the needle all the way into the skin. Hold the syringe in place with one hand, and pull back on the plunger with the other hand. Pull the plunger slowly. If you see blood in the syringe, you have hit a blood vessel.

Which site is best for IM injection?

A ventrogluteal site is the most commonly used and recommended site for IM injections in adults and children of walking age because of the large muscle mass. This site is located away from the superior and inferior gluteal arteries as well as the sciatic and superior gluteal nerves,9 and is also the least painful.

What happens if intramuscular injection hits a blood vessel?

You may feel pain and stiffness in the muscle. When a blood vessel breaks, scar tissue or blood clots can form and if a blood clot starts to wander and reaches the heart or lungs, the consequences can be life-threatening. Injections that hit an artery can be particularly dangerous.

How do you know if you hit a nerve while injecting?

Other injection site events



If a nerve is hit, the patient will feel an immediate burning pain, which can result in paralysis or neuropathy that does not always resolve.

Why do you need to remove air bubbles from a syringe?

The air bubble would float along the vein back to the heart; it would go through the right side of your heart and into your lungs and it would lodge in a blood vessel, which is a bit smaller than it is. The result is that blood would then be stuck behind this bubble of air.