The angle of the syringe and needle for intramuscular injections is:

Appeared in: OSSSC Nursing Officer-2021

Explanation

The standard angle for an intramuscular (IM) injection is 90 degrees, perpendicular to the skin.
This angle ensures the needle passes through the skin and subcutaneous tissue to deposit medication deep within the muscle.
Deep muscle deposition is crucial for medications that require rapid absorption, facilitated by the muscle's rich blood supply.

Option B: A 45° angle is too shallow for a standard IM injection and would likely deposit the medication into the subcutaneous tissue instead of the muscle.
Option C: A 15° angle is used for intradermal injections, which are administered into the dermis, the layer of skin just below the epidermis.
Option D: A 10° angle, similar to 15°, is a very shallow angle used for intradermal injections, not deep muscle injections.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Parenteral Medication Administration Angles as background academic context rather than a clinical decision trigger.
Using the correct injection angle is a critical patient safety measure. Depositing medication into the wrong tissue layer can alter its absorption rate and effectiveness.
For example, an IM medication mistakenly given subcutaneously will have a delayed onset of action, which can be dangerous in acute situations.
Improper technique can lead to complications such as nerve injury, abscess formation, tissue necrosis, and unnecessary pain for the patient.

How to Approach the Question

Identify the core of the question: it asks for the specific angle for 'intramuscular injections'.
This is a factual recall question based on fundamental nursing procedures.
Mentally review the standard angles for the three main types of parenteral injections.
Recall: Intradermal (ID) is very shallow (5-15°), Subcutaneous (SC) is 45-90°, and Intramuscular (IM) is deep (90°).
Match 'intramuscular' with its corresponding angle, 90°.
Evaluate the options provided and select the one that matches your recalled fact.

Concept Tested & Keywords

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E6 Pharmacology Nursing Lilley 11e Part 1 p. 132-134

E6 Nursing Fundamentals Taylor p. 862-864

E6 Nursing Fundamentals Potter Perry 12e Part 3 p. 174-176

Practise the full OSSSC Nursing Officer-2021

Attempt every question from this paper in a timed mock, then review the full solution for each one.