每日一题_2023.01.29

A patient undergoing lung transplantation be- cause of pulmonary fibrosis had his pressure- volume curves monitored throughout the operation. The following events took place in the operating room: (1) his right lung was resected, (2) the new right lung was trans- planted, and (3) positive end-expiratory pressure (PEEP) was added to prevent pulmonary edema. Which pressure-volume loop most likely represents the patient’s pulmonary function when the patient was being ventilated on one lung prior to the new lung being transplanted?

一名因肺纤维化而接受肺移植的患者在整个手术过程中监测了他的压力-容积曲线。 手术室发生了以下事件：（1）他的右肺被切除，（2）新的右肺被移植，（3）增加呼气末正压（PEEP）以防止肺水肿。 当患者在移植新肺之前在一个肺上通气时，哪个压力容积环最可能代表患者的肺功能？

(A) Loop A

(B) Loop B

(C) Loop C

(D) Loop D

答案解析：

与环路 A、C 和 D 相比，环路 B 以呼吸量减少和呼吸压力增加而著称。该环路是在患者仅用一个肺呼吸时记录的。 与其他环路相比体积减少应该让您想到可用于氧气交换的面积大幅减少的肺。 与回路 D 相比较低的基线压力表明在进行此追踪时未使用 PEEP。

正确答案：B