Shoulder Complex Flashcards
Capsular Pattern: Glenohumeral Joint
SLAM
Shoulder: Lateral Rotation > Abduction > Medial Rotation
Loss of movement
Resting (loose pack) Positon: GHJ
- 30 Flexion
- 30 Abduction
- Slight IR
Thoracic Outlet Syndrome
Description & Border & Contains
The area along the brachial plexus between the nerve roots & lower border of the axilla
Borders:
- ANTERIOR: clavicle, coracoid process, pec minor
- POSTERIOR: Upper Fibers of Traps (UFT), scapula
- MEDIAL: scalene mm & R1(first rib - behind clavicle)
- LATERAL: axilla
Contains:
- Brachial Plexus
- Subclavian artery
- Subclavian vein
Starts outside medial border (infront of scalenes) & passes infront of rib 1 && then joins the other outlet
Thoracic Outlet Syndrome
Description & Types
A term used to describe a group of signs & symptoms resulting from compression of nerves or vascular structures in the thoracic outlet
Diagnosis of exclusion - tends to be overdiagnosed
Types:
1. Neurogenic (True TOS)
2. Nonspecific “symptomatic” neurogenic
3. Vascular syndromes - arterial
4. Vascular syndromes - venous
Neurogenic (true TOS)
2
Patient presents with an anatomical anomaly compressing the brachial plexus (cervical rib - extra, or elongated C7 TP)
True TOS is rare
Nonspecfic “Symptomatic” Neurogenic
4
Most common
- Signs & symptoms similar to true TOS but there is no evidence of anatomical anomalies, mm atrophy, or EMG findings suggesting TOS.
- Diagnosis based solely on S/S & exclusion of competing diagnosis
- Typically, d/t to maladaptive posture. Related to adaptive shortening of sclene mm & pec minor (shortening of mm)
- Most TOS complaints fall under this subtype
Vascular - arterial
3
- Compression of subclavian artery
- Typically, d/t anatomical anomaly (ie cervical rib)
- Typically, aggravated by arm motion, especially overhead activity
Vascular - venous
2
- Compression of subclavian vein does not typically result in TOS complaints
- Typically, as a result of another cause (thrombosis)
TOS S/S
3 Types (4 + 5 + 2)
Neurogenic
1. Paresthesia
2. Numbness
3. Weak grip strength (?atrophy of thenar)
4. Loss of manual dexterity & precision movements in hand
Vascular - Aterial:
1. Cool skin
2. Pale extremity (BF interruptions)
3. Dimished or absent pulse
4. Rapid fatigue of limb
5. Lower BP on the affected side
Vascular - Venous:
1. Painful swelling in arm
2. Mottled, bluish discolouration
TOS: Epidemiology
(5)
- F>M (neurological TOS)
- Typically occurs b/t 20-50 years of age
- Neurological symtpoms more common > vascular
- Commonly involves lower roots of brachial plexus (C8-T1)
Ulnar Distributions - Commonly seen in athletes, occupations, & sports that involve extreme ranges of abduction & ER
TOS: Etiology
(9)
- Congenital anatomical anomaly (ie cervical rib)
- Muscle hypertrophy of scalenes mm, subclaviusm or pec minor (APICAL breathing)
- Inflammation or scar tissue formation in structures surrounding brachial plexus (occupying space)
- Traumatic (ie clavicle #, WAD causing scalene spasm)
- Posture (adaptive shortening of scalene & pec minor mm)
- Pressure (ie bra strap, bookbag, shoulder purse)
Bra strap: broad > thin = distributes forces - Excessive overhead activities
- Thrombus (vascular - venous TOS)
- Pancoast tumor - occupy an area (associated w/ horners syndrome)
TOS: Classifications
(4)
Scalenus Anterior Syndrome
- Site of compression: Interscalene triangle - b/t the scalenus anterior & medius (supraclavicular)
Costoclavicular Syndrome
- Site of compression: Costoclavicular space - b/t the clavicle & first rib (subclavicular)
Hyperabduction Syndrome
- Site of compression: Axillary interval: Under the coracoid process & behind the pec minor (infraclavicular)
Cervical Rib Syndrome
Special Tests:
Adson Manuever
Costoclavicular Syndrome (Military Brace) Test
Halstead Manuever
Wright Test
Allen Test
All tests palpate RADIAL pulse in different postures
(+) = if radial pulse dissapears
Aterial type TOS
Special Test: Roos Test (Elevated Arm Stress Test)
Procedure:
PT open & closes fists with shoulder (horizontal abduction) & elbow at 90 degrees for 3 minutes
(+) = inability to hold position for 3 mins
- Ischemic pain - arterial
- Heaviness/weakness = arterial
- S/S of neurological weakness - ex. numbness & tingling
Special Test: Shoulder Girdle Passive Elevation (Cyriax Release Test)
Procedure:
- Pt crosses arms & PT lifts elbows up - elevation
(+) = relieves neurological S/S
- Skin colour changes / temp - arterial
- Pulse becomes stronger
- Less cyanotic - venous
Cyriax = switch arm positions: pt has elbows @ 90 & pronated & PT lifts the arms this way
Cross Body (Horizontal) Adduction Test
Shoulder Separation
- The test is performed by passively bringing the patient’s arm into 90 degrees of forward flexion, with their elbow also flexed to 90 degrees.
- The examiner then horizontally adducts the flexed arm across the patient’s body, bringing their elbow towards the contralateral shoulder
(+) = if the maneuver successfully reproduces the patient’s symptoms of pain localized over the AC joint
Shoulder Separation
Definition & Etiology
Trauma to the ligaments holding the acromion and clavicle togeter causing separation b/t the 2 joint surfaces (subluxation or dislocation)
Etiology
1. Downward force on the acromion
2. Directly falling on or hitting the acromion
3. Falling on outstretched hand or falling on elbow
Shoulder Separation: S/S
(3)
- Step deformity (clavicle is no longer attached & clavicle sticks up)
Distal end of clavicle sticking up
Grade 3 sprain: Both acromioclavicular & coracoclavicular ligaments have been torn
Deltoid & trapezius mm may be torn from distal end of clavicle - Tenderness & swelling over ACJ
- Pain with shoulder horizontal adduction (compressing joint together), elevation (Flex or abd - clavicle posterior roll), and HBB (hurts b/c of EXT & clavicle move - Anterior roll)
Shoulder Separation: Special Test
1
Cross Body (Horizontal) Adduction Test
Shoulder Separation: Radiology
1
Stress-view X-Ray:
- Patient hold weight onto each arm - longitudinal traction
- Places an inferior pressure on ACJ
Shoulder Separation: Rockword Classification
3
Type I: Sprain
- Capsule is intact
- No separation or excessive spacing is seen
Type II: Subluxation
- Increased ACJ spacing
Type III: Dislocation
- Increased ACJ & costoclavicular space - completely dislocates
- Joint surfaces not in contact with each
Glenohumeral Joint Instability: Classifications
4
- Direction
Anterior, posterior, inferior, multidirectional - Degree
Subluxation (partially out), dislocation (out of socket) - Etiology
Traumatic, atraumatic - multidirectional instability - Timing
Acute, recurrent
Shoulder Dislocation
3
Separation of the humerus from the scapula
Most commonly dislocated joint in the body - very mobile - many degrees of freedom
Anterior dislocation is the most common = orthopedic population
Inferior dislocation = stroke population
Shoulder Dislocation: Epidemiology
(2)
- M>F
- Typically seen in patients <30 years of age - younger ppl d/t the activities they do
Shoulder Dislocation: Etiology
2 Types (3 + 1)
Traumatic
- Direct trauma to humeral head
- Indirect trauma (forced ROM) - key locked position in BJJ
- Most commonly while in abduction & ER = dislocate anteriorly
Stability in this position provided by subscapularis, GH ligaments (especially anterior band of the inferior ligament), and long head of biceps
ANTERIOR dislocations may damage the subscapularis, long head of biceps, GH ligaments, anterior capsule, and anterior glenoid labrum
Atraumatic
- General laxity in shoulder causes shoulder to become unstable - HYPER mobile
Shoulder Dislocation: S/S
(8)
- Feeling of slippage with pain
- Feeling of insecurity w/ specific activities
- Possible pain or apprehension when approaching extreme ROM
- DEC ROM during acute phase due to apprehension
- INC ROM during chronic phase due to instability - hypermobility into the range d/t stretching of the structures
- May appear normal on clinical examination, may become more apparent after repeated activity when fatigue sets in
Fatigue = start to experience pain / slippage - clinical tests. Tx like an instability - Possible atrophy on affected side due to disuse (chronic)
- Sulcus sign may be present
Shoulder Dislocation: Potential Complications
(5)
- Axillary nerve damage
- Must check for axillary nerve damage prior to reducing a subluxed or dislocated shoulder
- Check by testing the nerves they innervate (MMT) = deltoid, teres minor - Axillary artery
- May be damaged with injury or reduction - Brachial Plexus
- Less commonly damaged, may occur to other branches of the brachial plexus, of which the posterior cord is most common - Bankart Lesion
- Most anterior dislocations damage the labrum - Hill-Sach’s lesion
- Posterolateral humeral head compression (indentation) fracture (Hill-Sach’s lesion) may occur secondary to anterior shoulder dislocation d/t forceful impaction of the humeral head against the anteroinferior glenoid rim
- Indentation - dent = compression #