- Infant Immunization: The first patient is a 2-month-old healthy female infant scheduled for the following vaccinations: pneumococcal conjugate vaccine (PCV), pentavalent vaccine (Penta), and oral polio vaccine. Both the PCV and Penta vaccines are administered via the intramuscular route.
- Injection Site and Muscle: For a 2-month-old infant, intramuscular injections are typically administered in the anterolateral part of the thigh, targeting the Vastus lateralis muscle, which is part of the quadriceps group.
- Muscle Details:
- Origin: Greater trochanter and linea aspera of the femur.
- Insertion: Patella via the quadriceps tendon, then tibial tuberosity via the patellar ligament.
- Action: All four heads of the quadriceps extend the leg at the knee joint, and the rectus femoris muscle also flexes the thigh at the hip joint.
- Muscle Details:
- Locating the Injection Site:
- Divide the area from the greater trochanter to the lateral femoral condyle into thirds.
- Palpate the center of the middle third and locate the outer anterolateral aspect, lateral to the midpoint of the thigh.
- Grandfather's Flu Vaccination: The infant's 65-year-old grandfather also visited the health center to receive the influenza vaccine, which is offered to senior citizens. The flu vaccine is administered intramuscularly.
- Preferred Injection Site and Muscle: For adults, the preferred site for intramuscular injection is the deltoid muscle, located in the proximal part of the upper arm.
- Muscle Details:
- Origin: Acromial extremity of the clavicle (anterior fibers), acromion of the scapula (lateral fibers), and spine of the scapula (posterior fibers).
- Insertion: Deltoid tuberosity of the humerus.
- Action: Lateral fibers abduct the arm at the shoulder joint; anterior fibers flex and medially rotate the arm at the shoulder joint; posterior fibers extend and laterally rotate the arm at the shoulder joint.
- Muscle Details:
- Locating the Injection Site: The injection should be administered in the thickest part of the deltoid muscle, approximately 2 inches (5 centimeters) below the acromion process.