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: anterolateral thigh
Targeted Muscle: Vastus lateralis
Origin: Greater trochanter and lateral lip of the linea aspera of the femur.
Insertion: Patellar ligament.
Action: Extends the leg at the knee joint.
Location: Put one hand on the greater trochanter, or hip, and the other on the lateral side of the knee to find the location. The middle third of the lateral thigh, in the space between these landmarks, is the injection site.
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?
Site of Injection: Deltoid muscle
Origin: Lateral third of the clavicle, acromion, and spine of the scapula.
Insertion: Deltoid tuberosity of the humerus.
Action: Flex and medially rotate the arm. Abduct the arm. Extend and laterally rotate the arm.
Location: Feel for the acromion process, the bony protrusion on the shoulder, to determine the location. The thickest area of the muscle, usually the middle section of the deltoid, is where the injection site is located, two to three finger widths below the acromion process.