OSCE IM injection sites

Question 1

Hamstrings (Semimembranosus/Semitendinosus)

Answer 1

Borders:
1. Crainial border = femur
2. Dorsal border = greater trochanter
3. Caudal border = tuber ischii
Direct tip of needle caudally to avoid sciatic nerve

Question 2

Quadriceps

Answer 2

1. Dorsal border = iliac crest
2. caudal border = greater trochanter, femur
3. cranial border = patellar ligament
   Direct the tip cranially to avoid femoral nerve, Inject into the proximal ½ of the muscle belly
   avoid: femoral nerve

Question 3

epaxials

Answer 3

1. cranial border= L2 vertebrae
2. caudal border = iliac crests
3. medial border= dorsal spinous processes

Insert the needle 2-3 cm off midline – directly into the
lumbar muscles, Direct the needle away from the spine

Too medial – hit the spinal column/cord
Too lateral – penetrate the peritoneal cavity

Question 4

triceps

Answer 4

1. cranial border= point of shoulder
2. dorsal border= scapula
   Insert needle caudal to the humerus, Direct needle caudally, Inject into the proximal half of the muscle
   avoid: radial nerve, brachial plexus, thoracic wall