美國紐約一名員警，居然靠洋芋片鋁箔包裝，救活一名遇刺民眾。這名員警急中生智，在患者傷口，貼上密不透風的鋁箔袋，防止肺部氣體內外失壓。如果當時沒有這樣處置，恐怕會因「氣胸」而喪命。
https://twitter.com/BobLeeMD/status/1417239325666775058
This officer had medical training. Note that he did NOT tape all 4 sides of the bag down. This was intentional: the goal was to create a one-way valve allowing air to leave the chest cavity through the wound.
https://www.anne.education/d6exposure.html
胸部開放性傷口如超過2公分(氣管直徑之2/3)可能導致開放性氣胸，可用紗布外包裝之透明膠膜貼住四邊留一個開口，製作簡易單向閥，開口方向視傷患姿勢而異，以血液可以流出不要堵塞為主，如為坐姿則開口向下，躺姿則開口向後。
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