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Immunization of the 2-month old well female infant
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Intramuscular route (sites of injection) - Anterolateral thigh
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Target muscle - Vastus lateralis
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Origin: Greater trochanter and linea aspera of femur
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Insertion: Patella via quadriceps tendon and then tibial tuberosity via patellar ligament
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Action: Extend leg at knee joint
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Location - To locate the said muscle, it must be palpated above the knee joint and below greater trochanter. The muscle must also be divided into three parts and injected into the middle third part. Make sure that the immunization is administered at a 90 degree angle. As the infant is scheduled for two vaccinations, it must be noted that the injection sites must be 2.5cm apart.
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Immunization of the Grandfather for the flu vaccine
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Intramuscular route - Deltoid area (shoulder area)
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Target muscle (preferred site for IM injection) - Deltoid
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Origin: Acromial extremity of clavicle (anterior fibers), acromion of scapula (lateral fibers), and spine of scapula (posterior fibers)
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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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Location: To locate the said muscle, the muscle must be relaxed and measure three fingerbreadths down the acromion process. Form a triangle in this area, then administer the injection at the middle of the triangle. Make sure that the immunization is administered at a 90 degree angle.
References:
The Royal Children’s Hospital Melbourne. (n.d.). Intramuscular injections. https://www.rch.org.au/rchcpg/hospital_clinical_guideline_index/Intramuscular_Injections/
Tortora, G. J., & Derrickson, B. (2017). Principles of Anatomy and Physiology (15th ed.). John Wiley & Sons, Inc.
Vaccine administration. (2023). The Melbourne Vaccine Education Centre (MVEC). https://mvec.mcri.edu.au/references/vaccine-administration/