N3 Anatomy and Physiology (1st Sem AY 2022-2023)

ACTIVITY 3

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 the 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?

Since the patient is a 2-month-old female, then the muscle targeted for the injection is the vastus lateralis (lateral thigh) muscle.

Origin: Upper inter-trochanteric line, base of greater trochanter, lateral linea aspera, lateral supracondylar ridge, and lateral intermuscular septum.

Insertion: Lateral quadriceps tendon which attached onto the tibial tubercle

Action: extension of the knee

The vastus lateralis muscle is located on the lateral aspect of the thigh. To locate this area, the infant should be seated (slightly reclined), with their leg up and slightly bent. The injection site is about halfway between the knee (lateral femoral condyle) and the top of the femur (greater trochanter).

2) The baby’s 65-year-old grandfather also came to the center because the 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?

In the case of the baby’s grandfather who is a 65-year-old male patient, the preferred site for intramuscular (IM) injection of the Influenza vaccine would be the deltoid muscle.

Origin: lateral 1/3 of the clavicle, acromion, spine of scapula

Insertion: deltoid tuberosity of humerus

Action: shoulder abduction, flexion, and extension

We can locate the area by exposing the upper arm and through the acromion process which is done by palpating the bony protrusion. The injection site is situated 2.5 to 5 cm below the acromion process, near the middle of the deltoid muscle.

References:

Glynda Rees Doyle, & Jodie Anita McCutcheon. (2015, November 23). 7.4 Intramuscular Injections. Retrieved September 23, 2022, from Opentextbc.ca website: 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.