1) It is immunization day at the health center. The first patient is a 2-month-old well female infant who is scheduled for the following vaccinations: pneumococcal conjugate vaccine (PCV), pentavalent vaccine (Penta) and oral polio vaccine. PCV and Penta are given via intramuscular route. Where are the sites of injection? What muscle is targeted in the injection? Write down its origin, insertion, and action. How do you locate this area?
Site of Injection: Lateral side of the thigh in the mid portion of the vastus lateralis muscle
Muscle of injection site: Vastus Lateralis
Origin: Greater trochanter and Linea aspera of femur.
Insertion: Patella via quadriceps tendon and then tibial tuberosity via patellar ligament.
Action: extends leg at knee joint
To locate this area, one must put their hand above the knee and below the groin. The vastus lateralis extends from that area above the knee and below the groin – middle of the covered region of the hands.
2) The baby’s 65-year-old grandfather also came to the center because influenza vaccine is being offered to senior citizens. The flu vaccine is given intramuscularly. Which muscle is the preferred site for IM injection in this case? Write down its origin, insertion, and action. How do you locate this area?
The preferred injection site of flu vaccines in senior citizens is the deltoid muscle
Origin: Acromial extremity of clavicle (anterior fibers), acromion of scapula (lateral fibers), and spine of scapula (posterior fibers).
Insertion: Deltoid tuberosity of humerus.
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.
To locate this area:
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- Find the knobbly top of the arm (acromion process)
- It is a triangle shaped area that is 1-2 inches below the acromion process
Tortora, G. J., & Derrickson, B. H. (2011). Principles of Anatomy and Physiology. Wiley.
Doyle, G., & McCutcheon, J. (2015). 7.4 Intramuscular Injections. Bccampus. Retrieved from https://opentextbc.ca/clinicalskills/chapter/6-8-iv-push-medications-and-saline-lock-flush/#:~:text=To%20locate%20the%20landmark%20for,inches)%20below%20the%20acromion%20process.