Subacromial Impingement Syndrome Flashcards
What causes rotator cuff disease?
Tendon degeneration
Tear to Avascular region
Impingement
Trauma/instability
What is the critical zone of the rotator cuff?
Critical zone of Supraspinatus (10 mm from distal attachment on humerus
What is the relevance of the critical zone of the rotator cuff?
It has a low amount of blood flow and is more susceptible to injury
What are the 3 types of impingement?
Primary
Secondary
Internal
What is primary impingement?
Related to bony and anatomical changes that reduce the space (narrowing)
What structures are associated with primary impingement?
Rotator cuff tendons (tendinopathy)
Long head of biceps (posterior capsule tightness)
GH joint capsule (morphology of acromion)
Subacromial bursa (postural dysfunction)
Subacromial arch (hooked acromion)
What is secondary impingement? (Functional disturbance)
Weakness of muscles
Scapular position
Muscle imbalance
What is an internal impingement?
Presents as posterior pain with abduction and ER positions (most common in throwing athletes)
What are structures associated with an internal impingement?
Supra and Infraspinatus tendons
GH joint capsule
Subacromial bursa
What is stage 1 of SPS?
Edema and hemorrhage
What is the population of stage 1 SPS?
<25 y/o and is reversible with conservative treatment
What is stage 2 of SPS?
Fibrosis and tendinopathy
What is the population associated with stage 2 of SPS?
25-40 y/o (recurrent pain)
What is stage 3 of SPS?
Bone spurs and tendon rupture
What is the population associated with stage 3 of SPS?
> 40 y/o with progressive disability and surgical management
