5 Injection Principles and Techniques Free Online FlashCards

Why must an injection use the prescribed route?

Using the wrong route or site can change absorption, reduce effectiveness, or cause injury.

What factors guide needle length and gauge?

Choose needle length and gauge based on route, site, tissue depth, medication viscosity and volume, and the patient’s age and body composition.

What measurement error must be avoided with insulin or tuberculin syringes?

Use calibrated insulin or tuberculin syringes only for their intended medication and units; never confuse units with milliliters.

Can a syringe be reused after its needle is changed?

Use a new sterile needle and syringe for every injection and every patient. Changing the needle does not make a used syringe safe to reuse.

Which medication-administration rights should be verified before an injection?

Verify the required medication-administration rights, including the right patient, medication, dose, route, time, and site.

Which skin areas should be avoided for an injection?

Choose intact skin; avoid areas that are infected, bruised, scarred, inflamed, edematous, or otherwise unsuitable.

At what angle is an intradermal injection generally inserted?

Stretch the skin taut and insert the needle bevel up at a shallow angle of $5–15^\circ$, just into the dermis.

What local result is expected during a tuberculin skin test injection?

A small, pale wheal is expected for procedures such as a tuberculin skin test.

What insertion angles may be used for a subcutaneous injection?

Insert at $45^\circ$ or $90^\circ$, as directed by needle length, tissue depth, medication, and device instructions.

What should be done with repeated subcutaneous injection sites?

Rotate repeated injection sites as directed, especially for medications such as insulin.

What angle and site-selection principle apply to intramuscular injections?

Insert an intramuscular needle at $90^\circ$; use anatomical landmarks and choose a site with adequate muscle while avoiding nearby nerves, vessels, and bone.

Which intramuscular vaccine site is favored for most infants?

For most infants’ intramuscular vaccine injections, guidance favors the anterolateral thigh; the deltoid is commonly used for older children and adults.