 Hi, welcome to Nursing School Explained in this video on hypovolemic shock. Now, a hypovolemic shock is basically a loss of intrabascular volume. And that can be a loss of volume, so of basically the fluid, or it can be loss of blood, or it can be a combination of the two. So if we're just using losing fluid, this can be due to vomiting or diarrhea or maybe a heat stroke, extreme dehydration, and so forth. But we can also lose blood or blood components from, let's say, a GI bleed or any kind of massive hemorrhage from a trauma or any kind of other injury. Now, those of fluid losses to the outside, they completely leave the body. But then there's also third spacing, such as in burns, or maybe even patients with ascites who have third spacing in their abdomen. And that would basically be lost to the extravascular space, where it's still, where the fluids may still remain inside the body, but they are now out of the intrabascular space. And whenever we think about loss of intrabascular space, we have to talk about cardiac output and stroke volume. So, physiologically, if we now have decreased volume, we're going to have decreased stroke volume, which then leads to decreased cardiac output, which decreases the blood pressure, which means that our organs are not being perfused. The body is going to hold on to every drop of fluid, and therefore we have decreased human output, and then eventually we'll have impaired cellular metabolism.