h***a
发帖数: 312 | 1 pulmonary embolism 是呼酸还是呼碱啊？USMLE SIM给的答案是呼碱，原因是低氧血症
引起反射性呼吸增快，PaCO2降低，但是肺动脉栓塞了，CO2怎么能拍出去呢？ | a******3
发帖数: 1017 | 2 是呼碱。个人觉得栓塞的只是一只血管，其他没栓塞的肺组织可以代偿的。 | g*****a
发帖数: 95 | | h***a
发帖数: 312 | | a******3
发帖数: 1017 | 5 呼吸加快就是为了代偿低氧，所以造成低CO2。但低氧不能完全代偿。所以看到低氧，
低co2的，就要考虑PE。 | h***a
发帖数: 312 | | f***r
发帖数: 413 | 7 The result is what I expected, but my reasoning is different.
First, only large PE can cause hypoxia.However, tachypnea is commonly see in
PE, no matter how severe it is. So it is not hypoxia that causes tachypnea.
Second, I think the chest pain and panic is the major reason for tachypnea.
Third, tachypnea leads to respiratory alkalosis.
To sum up, the occlusion of pulmonary artery is generally not a problem for
co2 expiration. If it is the case, then the patient should be killed by PE
before any respiratory compensation. |
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