Diagnosis is done mainly by hepatic venous pressure gradient measurement.

诊断主要通过测量肝静脉压力梯度来完成。

So, the pressure gradient across the collateral vessel vanishes, resulting in diminished collateral circulation.

于是，侧支血管两侧的压力梯度消失了，导致侧支循环减少。

The partial pressure gradient of each gas equilibrates as blood flows through the pulmonary capillaries.

当血液流过肺毛细血管时，每种气体的分压梯度趋于平衡。

Let's take a look at this, taking into account partial pressure gradients.

我们看一下，分压梯度。

Just like in the lungs, partial pressure gradients drive gas exchange in the tissues.

就像在肺中一样，分压梯度会驱动组织中的气体交换。

Henry's law tells us that pressure gradients affect the movement of gas into and out of a solution in a liquid.

Henry定律告诉我们，压力梯度影响气体进出液体溶液的运动。

We talked about partial pressure gradients, and how they, along with changes in blood temperature, acidity, and CO2 concentrations, change how hemoglobin binds to gases in your blood.

我们讨论了分压梯度，以及它们如何随着血液温度、酸度和二氧化碳浓度的变化，改变血红蛋白与血液中气体的结合方式。

They are usually caused by thunderstorms – or strong pressure gradients associated with cyclones – which increase wind speed over a wide area.

它们通常是由雷暴或与旋风相关的强压力梯度引起的， 这会增加大范围内的风速。

So basically there is no partial pressure gradient, which makes it really hard to get oxygen into your blood. But, let's get back to the red blood cells.

所以基本上没有分压梯度，这使得氧气很难进入血液。但是，让我们说回到红细胞。

The rate of venous return is determined by two factors: the pressure gradient between venous pressure and right atrial pressure; and venous resistance.

静脉压与右心房压之间的压力梯度；以及静脉阻力。

The lung pressure (or more specifically, intrapulmonary pressure), becomes less than atmospheric pressure, and that creates a pressure gradient, or a difference between the two pressures.

肺压力（或者更具体地说，肺内压力）变得比大气压力小，这就产生了压力梯度，或者两种压力之间的差异。

So the hemoglobin drops its carbon dioxide, which moves down its partial pressure gradient into the air of your lungs, so you can exhale it, and the whole thing can start all over again.

所以血红蛋白会下降它的二氧化碳，二氧化碳会沿着它的分压梯度移动到你肺部的空气中，所以你可以呼出它，整个事情可以重新开始。

This big differences in pressure make it easy for oxygen molecules to travel from the outside air into your blood plasma, because, as a rule dissolved gases always diffuse down their partial pressure gradients.

这种巨大的压力差异使得氧分子很容易从外部空气进入血浆，因为，作为一项规则，溶解气体总是沿着它们的分压梯度扩散。

It's important to note that gas exchange is directly proportional to the partial pressure gradient across the respiratory membrane, as partial pressure takes into account both concentration and pressure.

需要注意的是，气体交换与呼吸膜的分压梯度成正比，因为分压同时考虑浓度和压力。

The heart's entire purpose is to maintain that same kind of pressure gradient, by generating high hydrostatic pressure to pump blood out of the heart, while also creating low pressure to bring it back in.

心脏的全部目的是保持同样的压力梯度，通过产生高静水压将血液泵出心脏，同时也产生低压将血液带回来。

But since the pressure is so low in your veins — it's like one 12th of the pressure in your arteries — there isn't much pressure gradient left to push the blood back to your heart.

但是由于你静脉中的压力很低——大约是你动脉压力的 1/12——没有多少压力梯度将血液送回心脏。

This pressure gradient between the lungs and the pleural cavity is referred to as transpulmonary pressure and creates a vacuum effect that is necessary to keep the lungs expanded at all times.

肺和胸膜腔之间的这种压力梯度被称为经肺压，产生真空效应，这是保持肺始终扩张所必需的。

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。