Answer
With the patient in a seated position, the arm is held comfortably at the patient’s side and externally rotated. The coracoid is palpated, and the needle is inserted approximately 1.5 in. (~4 cm) laterally and 1.5 in. (~4 cm) inferiorly. Alternatively, the shoulder can be approached posteriorly by inserting the needle inferior to the acromion. (See the image below.)
Anterior approach to aspiration of glenohumoral joint. Point where coracoid can be palpated is marked with "C."
For more information, see Shoulder Arthrocentesis.
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Media Gallery
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Medial approach to aspiration of ankle joint.
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Medial approach to aspiration of knee joint.
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Anterior approach to aspiration of glenohumoral joint. Point where coracoid can be palpated is marked with "C."
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Approach to aspiration of the wrist joint.
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Approach to aspiration of elbow joint, with landmarks labeled. LE = lateral epicondyle; R = radial head; O = olecranon.
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Medial approach to aspiration of metacarpophalangeal joint.
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