MSK Flashcards
What portion of the anterior shoulder can look like a rotator cuff tendon tear and is where the biceps tendon leaves the groove?
rotator interval
what is the normal width at the AC joint under ultrasound?
6mm
what two structures are the ultrasound landmarks when evaluating the elbow for potential joint injection?
lateral epicondyle and trochlea of humerus
what structure is located between the lateral epicondyle and the humerus trochlea on the posterior elbow?
posterior fat pad
when injecting the elbow, what approach should be used?
transverse , in plane, insert needle over the lateral epicondyle
describe the location of the popliteus in relationship to the LCL?
deep to the LCL
what structure is found in the femoral groove above the lateral meniscus and under the LCL?
popliteus
on a wrist ultrasound, what structure is located between the extensor digitorum tendon and the joint?
dorsal radiocarpal ligament
an abscess greater than what size is unlikely to resolve with antibiotics only?
> 3cm
what is ultrasound posterior enhancement?
brighter appearance of tissue deep to an area of fluid due to increased ultrasound transmission
what type of artifact can be used to identify foreign body in soft tissue?
shadow
ultrasound of fluid filled round structures, such as cysts, can have what type of artifact at the edges?
linear shadowing
when scanning the proximal biceps tendon, what slight orientation of the probe should be used to avoid anisotropy?
slight cephalad tilt
hypoechoic clefts will be seen in the short axis view of what RTC tendon? why?
subscapularis - due to interdigitation of muscle (hypoechoic) with tendon (hyperechoic)
ultrasound of which RTC tendon will have a birds beak appearance in long axis view?
supraspinatus