NAVLE（北美执业兽医考题）Day 774

Q1:A 4-year old female spayed mixed Chihuahua presented to the emergency service at approximately 5am this morning after presumptively being attacked by a coyote. The patient has a flail chest and it is questionable if there is direct communication between the thoracic cavity and the environment (it was difficult to examine the dog due to her fractious nature). Exploration of the wound was performed, and once anesthetized, it was apparent she had a pneumothorax. The patient must be ventilated, as there is no vacuum present in the chest for lung expansion to occur. What pressure should the anesthetist not exceed if manually bagging the patient during anesthesia?一只4岁的雌性已绝育混种吉娃娃由于今天大约凌晨5点的时候怀疑被野狼攻击前来急诊。病患出现了连枷胸但不确定胸腔是否以及与外界直接相通（由于该犬的性格，很难做全面检查）。麻醉状态下进行了伤口的探查提示这只狗出现了气胸。由于她胸腔内负压环境的消失使其肺部无法扩张，这只狗需要正压通气。如果需要在麻醉时手动通气，则麻醉师需要保持气道压力在多少以下？