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: anterior lateral aspect of the thigh
Target Muscle: Vastus Lateralis
Origin: Intertrochanteric line, greater trochanter, gluteal tuberosity, linea aspera of femur
Insertion: Tibial tuberosity (via patellar ligament), patella, (lateral condyle of tibia)
Action: Knee joint: Leg extension
How to locate the area: extends from one hand’s breadth above the knee to one hand’s breadth below the greater trochanter
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?
Preferred site for IM injection: Deltoid Muscle
Origin: lateral 1/3 of clavicle (clavicular part), acromion (acromial part), spine of scapula (spinal part)
Insertion: deltoid tuberosity of humerus
Action:
Clavicular part: flexion and internal rotation of the arm
Acromial part: abduction of the arm beyond the initial 15°
Spinal part: extension and external rotation of the arm
How to locate the area: To locate this area, lay three fingers across the deltoid muscle and below the acromion process. The injection site is generally three finger widths below, in the middle of the muscle.
References:
opentextbc.ca
kenhub.com