Answer
Potential damage to cartilage can be avoided by understanding the joint anatomy and avoiding further advancement of the needle into the joint space once synovial effusion enters the syringe.
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Media Gallery
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Anterior view of right knee.
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Anatomic landmarks for knee arthrocentesis.
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Infiltration of local anesthetic via medial parapatellar approach (left knee).
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Left-knee aspiration via medial parapatellar approach.
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Application of bandage after left-knee aspiration.
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