冈上肌出口位
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supraspinatus weakness weakness of external rotation impingement
Moosikasuwan et al. RadioGraphics 2005; 25:1591–1607
The supraspinatus muscle aids not only in stabilization of the shoulder joint but also in abduction of the arm.
Supraspinatus tendon tear
Clinical findings
Approximately 40% of asymptomatic patients over 50 years old have full thickness rotator cuff tears
The prevalence of partial- and full-thickness tears in symptomatic patients over 60 years old is greater than 60%
Bursal-side partial tears or full-thickness tears of the rotator cuff are always associated with severe degenerative changes in the acromion, but degenerative changes in the undersurface of the acromion can be present when the rotator cuff is normal
Vähäkari M et al. Acta Radiol. 2010,51(2):202-206
Bigliani et al. (1986) found a type III acromion in 70% of cadavers with rotator cuff tears, whereas only 3% of type I acromion were associated with a tear.
Type II acromion is characterized by a curved undersurface(81.3%).
type III acromion has an anterior hook (hooked acromion)(14.1%).
A fourth type of acromion shape was added that has a convex undersurface
Supraspinatus outlet view and supraspinatus tendon tear
早读片 胡娟 2011-02-24
肩关节解剖
冈上肌腱 出口
冈上肌出口位
Type of acromion
Type I has a flat undersurface and no relationship to impingement(4.6%).
cБайду номын сангаасlcific tendinitis
Thanks!
Acute macrotrauma is less frequently responsible for tears
Clinical examination as a whole has a sensitivity 90% and a specificity of 54% in the detection of full-thickness rotator cuff tears.
Clinical impingement syndrome is characterized by pain during use of the shoulder that is relieved by local subacromial anesthetic injection.
To test for weakness of external rotation by evaluating the infraspinatus and tears minor muscles
Chronic causes such as repetitive microtrauma, subacromial impingement, tendon degeneration, and hypovascularity are thought to be responsible for most tears and account for this age-dependent prevalence.
Supraspinatus tendon tear
de Jesus et al.AJR 2009; 192:1701–1707
Differential diagnosis
Supraspinatus tendinosis calcific tendinitis subacromial subdeltoid bursitis greater tuberosity fracture adhesive capsulitis
Moosikasuwan et al. RadioGraphics 2005; 25:1591–1607
The supraspinatus muscle aids not only in stabilization of the shoulder joint but also in abduction of the arm.
Supraspinatus tendon tear
Clinical findings
Approximately 40% of asymptomatic patients over 50 years old have full thickness rotator cuff tears
The prevalence of partial- and full-thickness tears in symptomatic patients over 60 years old is greater than 60%
Bursal-side partial tears or full-thickness tears of the rotator cuff are always associated with severe degenerative changes in the acromion, but degenerative changes in the undersurface of the acromion can be present when the rotator cuff is normal
Vähäkari M et al. Acta Radiol. 2010,51(2):202-206
Bigliani et al. (1986) found a type III acromion in 70% of cadavers with rotator cuff tears, whereas only 3% of type I acromion were associated with a tear.
Type II acromion is characterized by a curved undersurface(81.3%).
type III acromion has an anterior hook (hooked acromion)(14.1%).
A fourth type of acromion shape was added that has a convex undersurface
Supraspinatus outlet view and supraspinatus tendon tear
早读片 胡娟 2011-02-24
肩关节解剖
冈上肌腱 出口
冈上肌出口位
Type of acromion
Type I has a flat undersurface and no relationship to impingement(4.6%).
cБайду номын сангаасlcific tendinitis
Thanks!
Acute macrotrauma is less frequently responsible for tears
Clinical examination as a whole has a sensitivity 90% and a specificity of 54% in the detection of full-thickness rotator cuff tears.
Clinical impingement syndrome is characterized by pain during use of the shoulder that is relieved by local subacromial anesthetic injection.
To test for weakness of external rotation by evaluating the infraspinatus and tears minor muscles
Chronic causes such as repetitive microtrauma, subacromial impingement, tendon degeneration, and hypovascularity are thought to be responsible for most tears and account for this age-dependent prevalence.
Supraspinatus tendon tear
de Jesus et al.AJR 2009; 192:1701–1707
Differential diagnosis
Supraspinatus tendinosis calcific tendinitis subacromial subdeltoid bursitis greater tuberosity fracture adhesive capsulitis