1)
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Sites of injection?
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Anterolateral thigh
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What muscle is targeted?
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Vastus lateralis
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Origin, insertion and action?
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Origin: Intertrochanteric line, greater trochanter, gluteal tuberosity, linea aspera of femur
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Insertion: Tibial tuberosity, patella
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Action: Extension of knee
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How do you locate?
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Below the greater trochanter and above the lateral femoral condyle
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Divide the muscle into thirds and administer the injection into the middle third of the muscle
2)
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What muscle is targeted?
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Deltoid
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Origin, insertion, action
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Origin: Acromial extremity of clavicle, acromion of scapula, and spine of scapula
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Insertion: Deltoid tuberosity of humerus
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Action: Lateral fibers abduct arm at shoulder joint, anterior fibers flex and medially rotate arm at shoulder joint, posterior fibers extend and laterally rotate arm at shoulder joint
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How do you locate?
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Deltoid is a rounded triangular shape on the upper arm, on top of the humerus and scapula
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Injection site is a smaller area, in the middle of the deltoid, above the deltoid tuberosity
References:
Australian Government Department of Health and Aged Care. (n.d.). Anatomical markers used to identify the deltoid injection site. https://immunisationhandbook.health.gov.au/resources/figures/figure-anatomical-markers-used-to-identify-the-deltoid-injection-site
Physiopedia. (n.d.). Vastus Lateralis. https://www.physio-pedia.com/Vastus_Lateralis
Safer Care Victoria. (2017). Intramuscular injections for neonates. https://www.safercare.vic.gov.au/clinical-guidance/neonatal/intramuscular-injections-for-neonates
The Royal Children’s Hospital Melbourne. (n.d.). Intramuscular Injections. https://www.rch.org.au/rchcpg/hospital_clinical_guideline_index/Intramuscular_Injections/
Tortora, G., & Derrickson, B. (2017). Principles of Anatomy & Physiology (15th ed.). John Wiley & Sons, Inc.
Vaskovic, J. (2023). Quadriceps femoris muscle. https://www.kenhub.com/en/library/anatomy/the-quadriceps-femoris-muscle