That's because the diaphragm muscle lowers during inspiration, and that creates negative pressure in the chest to bring in air, and that negative pressure also brings a bit more venous blood back to the right atrium and right ventricle.

这是因为吸气时膈肌下移，胸腔内的负压将空气吸入；这个负压同时将一些静脉血倒吸回右房和右室。

The gold standard for determining if there is portal hypertension is obtaining a hepatic venous pressure gradient measurement where a catheter is inserted inside the inferior vena cava and then inside the portal vein to measure the difference between both pressures.

确定是否存在门静脉高压症的金标准是测量肝静脉压力梯度，即将导管先后插入下腔静脉、门静脉内测量两个压力之间的差异。

Since the damaged bridging veins are under low pressure, the bleeding can be slow, which causes delayed onset of symptoms, which might develop over the course of days to weeks, as the hematoma gradually expands.

由于损伤的桥静脉通常压力很，出血会比慢，这会让症状出现延迟：随着血肿慢增大，症状在数日至数周内慢发展。

Now, Klebsiella pneumoniae can cause various hospital-acquired infections in people with underlying illnesses (like diabetes) and in the presence of foreign devices like central venous catheters, endotracheal tubes, or urinary catheters.

同时，肺炎克雷伯杆菌容易在患有基础疾病（如糖尿病）的人群和应用中静脉导管、气管内插管或者导尿管的人群中，引起各种医院获得性感染。

This will compress the structures within, and the first ones to feel the effect of compression are the veins because the pressure inside their lumen is normally low.

这会压迫其内部结构；最先受到影响的是静脉，因为静脉内压力通常。

So a deep vein thrombosis or DVT is a blood clot in one of those deep veins.

因此，深静脉血栓（DVT）指的是在深静脉内形成血凝块。

Can intra-arterial alteplase after thrombectomy improve functional outcomes for patients?

血栓切除术后静脉内使用阿替普酶能否改善患者的机能恢复？

So an " intravenous muscle relaxant" is basically an injection – that is, something that is put into your body with something called a " needle" (needle).

因此，“静脉内肌肉松弛剂” 基本上是一种注射剂——也就是说， 用一种叫做“针” （针）的东西将其注入您的体内。

Among these children, no evidence of a difference in mortality at 96 hours was noted between the oral and intravenous rehydration strategies.

在这些儿童中，口服和静脉补液策略在96小时内的死亡率并无显着差异。

If you can see the veins under your skin, they might look blue, even though the blood inside them is red.

如果你能看到皮肤下的静脉，它们可能看起来是蓝色的，尽管血管内的血液实际上是红色的。

They're injecting intravenously or intra-arterial, threading a catheter up, as we discussed, and injecting in the brain.

他们正在静脉注射或动脉注射，将导管送入， 正如我们讨论的，然后在大脑内注射。

In atrial fibrillation, electrical impulses are initiated randomly from many other sites called ectopic sites in and around the atria, commonly near the roots of pulmonary veins.

房颤时，房内和房周围的许多异位起搏点（通常是肺静脉根部附近）随机产生电脉冲。

Atrial fibrillation is caused by multiple electrical impulses that are initiated randomly from many ectopic sites in and around the atria, commonly near the roots of pulmonary veins.

房颤是由多个电脉冲引起的，这些电脉冲是从房内和周围的许多异位部位随机发起的，通常在肺静脉根部附近。