图3，左侧颈动脉DSA侧位片显示左侧后交通动脉瘤。

Fig. 3 Lateral view of left carotid DSA shows the PComAA.

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摘要： 患者麻醉满意后，暴露左侧颈动脉鞘，它一般沿胸锁乳突肌的前缘延伸。

Introduction: After administering appropriate anesthesia to the patient, expose the left carotid sheath as it extends along the anterior border of the sternocleidomastoid muscle.

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马宏升的中风导致身体左侧颈动脉血流阻塞，而颈动脉正是大脑左半球供血的主要通道。

Maloney's stroke resulted from a clot in his left carotid artery, the main supplier of blood to the brain's left hemisphere.

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