Diuresis used to increase urine output and decrease extracellular fluid volume. Substances in the circulation can also increase the amount of circulating fluid by increasing the osmolarity of the blood. This has the effect of pulling water from the interstitial space, making more water available in the blood and causing the kidney to compensate by removing it as urine. In hypotension, often colloids are used intravenously to increase circulating volume in themselves, but as they exert a certain amount of osmotic pressure, water is therefore also moved, further increasing circulating volume. As blood pressure increases, the kidney removes the excess fluid
Jehovah's Witnesses and blood transfusions Society in which it states: "Consider a man who is told by the doctor that he must abstain from alcohol. Would he be obedient if he quit drinking alcohol but had it put directly into his veins?" Muramoto says the analogy is false, explaining: "Orally ingested alcohol is absorbed as alcohol and circulated as such in the blood, whereas orally eaten blood is digested and does not enter the circulation as blood. Blood introduced directly into the veins circulates and functions as blood, not as nutrition. Hence, blood transfusion is a form of cellular organ transplantation. And ... organ transplants