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19 Cards in this Set
- Front
- Back
With shoulder arthroscopy, what is a common reason of interscalene block failure?
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Inadequate anesthesia of T2
dermatome |
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What surgical site does this correspond to?
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Posterior arthroscopy portal
|
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An interscalene block administered at the time of surgery may also lead to
palsy of what nerve? |
Phrenic nerve
|
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What is the lateral approach to the shoulder?
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Deltoid splitting approach
|
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How far distal to the acromion can the deltoid be safely split? Why?
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No more than 5 cm
With further split, axillary nerve at risk |
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What is the interval for the posterior shoulder approach?
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lnfraspinatus
Teres minor |
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With the posterior approach, what should be avoided? Why?
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Avoid dissecting below teres minor (within quadrangular space) Axillary nerve and posterior humeral circumflex arteries at risk
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With the deltopectoral approach, which vein is at risk?
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Cephalic
|
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Excessive medial retraction for exposure may injure what structure?
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Musculocutaneous nerve
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What two structures should be protected at inferior edge of subscapularis?
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Axillary nerve
Anterior circumilex artery and veins |
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For the anterolateral approach, what is the proximal interval?
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Deltoi
Pectoralis major |
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What is the distal interval?
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Brachialis split
|
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Why does the distal approach work? What nerves supply the brachialis?
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Brachialis is duly innervated
Musculocutaneous and radial nerves |
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For the posterior approach, what is the proximal interval?
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Deltoid
Triceps |
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How much of the humerus can be accessed proximally?
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Up to 8 cm
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For the anterolateral approach to the distal humerus, what is the interval?
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Brachialis
Brachioradialis |
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What structure is at risk?
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Radial nerve
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For the lateral approach to the distal humerus, what is the interval?
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Brachioradialis
Triceps |
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Then how does the deeper dissection proceed?
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Lift extensor carpi radialis longus and brevis (ECRL and ECRB) off
Work anterior to epicondyle and lateral collateral ligament (LCL) |