PROBLEM # 1
Where are the sites of injection?- Anterolateral thigh
What muscle is targeted in the injection?
- Vastus lateralis
- Origin: Greater trochanter and linea aspera of femur
- Insertion: Patella via quadriceps tendon and then tibial tuberosity via patellar ligament
- Action: All four heads extend leg at knee joint; rectus femoris muscle acting alone also flexes thigh at hip joint
- Divide the muscle into thirds and administer the injection into the middle third of the muscle
PROBLEM # 2
What muscle is the preferred site for IM injection in this case?
- Deltoid muscle
Write down its origin, insertion, and action.
- 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 point
How do you locate this area?
- Central and thickest portion of the deltoid muscle — above the level of the armpit and approximately 2-3 fingerbreadths below the acromion process
References:
Immunize.org. (2020, July). Choosing proper needle length for vaccination of children and adults: What should you consider? https://www.immunize.org/technically-speaking/20200721.asp#:~:text=The%20deltoid%20muscle%20is%20most,is%20the%20anterolateral%20thigh%20muscle.
Tortora, G. J., & Derrickson, B. (2017). Principles of Anatomy and Physiology (15th ed.). John Wiley & Sons Inc.
You call the shots vaccine administration - centers for disease control ... DEPARTMENT OF HEALTH AND HUMAN SERVICES USA. (2022, January 19). https://www.cdc.gov/vaccines/hcp/admin/downloads/IM-Injection-Infants-508.pdf