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Based on the analysis of the theories of value chain and multinational merger and acquisition, we research the merger and acquisition of petrochemical industries based on value chain, according to the trait of the value chain of the petrochemical industries. And we propose the implementation process and the integration method for the merger and acquisition of petrochemical industries based on value chain.
Objective: To report an
unusual case of pyriform sinus-pleural-mediastinal fistula secondary to
internal penetrating trauma by a toothbrush, with emphasis on management
options. Case report: A 26-year-old
woman swallowed a toothbrush in a violent manner 8 months ago in an attempt of
self-mutilation. She immediately complained of neck pain and dysphagia. She was
diagnosed with pyriform sinus-pleural-mediastinal fistula. The fistula was
repaired. Primary closure was performed and covered
with the sternocleidomastoid muscle flap, and reinforced with thyroid tissue
and surrounding tissues. The patient did not present any complications or
recurrence, and she gained weight after the operation. Conclusion: Early recognition of hypopharyngeal perforation is
important, and in selected cases, immediate repair of the perforation can lead
to a good prognosis.