A practitioner is needling points on the upper back and shoulder, such as GB-21 (Jianjing) and BL-13 (Feishu). What is the most critical potential adverse event associated with these points, and what is the primary preventative measure?
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A
Pneumothorax; using a shallow, oblique insertion angled away from the lung field.
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B
Brachial plexus injury; confirming the patient has no history of radiating arm pain.
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C
Needle shock (fainting); ensuring the patient is in a supine position and has eaten recently.
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D
Vertebral artery injury; needling only to a depth of 0.3 cun.