# Chapter Seven: The Total Body Water and The Plasma Sodium Concentration

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Text version: https://stenobird.com/podcast/channel-your-enthusiasm-1374325/chapter-seven-the-total-body-water-and-the-plasma-sodium-concentration.md
Podcast: [Channel Your Enthusiasm](https://stenobird.com/podcast/channel-your-enthusiasm-1374325)
Published: 2022-04-24T02:56:54+00:00
Episode link: http://www.rosebook.club/episodes/2022/1/23/chapter-seven
Audio file: https://static1.squarespace.com/static/548bc7f6e4b0a269c594ebc2/t/6264ba8d7b211a35fe82fb24/1661094725357/Chapter+7.mp3
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Duration seconds: 4712

## Resource

Chapter 7 References Sands JM, Blount MA and Klein JD. Regulation of Renal Urea Transport by Vasopressin. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3116377/ In this invited piece, Sands and colleagues explain that although urea is permeable across membranes, this is slow, thus urea transporters in the kidney, under control of vasopressin, are needed to facilitate transport and create the medullary gradient.  Text book using 20% of extracellular compartment being in the intravascular compartment. https://courses.lumenlearning.com/ap2/chapter/body-fluids-and-fluid-compartments-no-content/ another one: https://med.libretexts.org/Bookshelves/Anatomy_and_Physiology/Book%3A_Anatomy_and_Physiology_(Boundless)/25%3A_Body_Fluids_and_Acid-Base_Balance/25.2%3A_Body_Fluids/25.2B%3A_Fluid_Compartments The chapter I wrote where I went through the math in figure 7-3. It was a major revelation to me: https://docs.google.com/document/d/17BM1xihvlztuQlU8GVNhEDoPLzr6GounHYZAtVUkLvw/edit?usp=sharing Association Between ICU-Acquired Hypernatremia and In-Hospital Mortality https://journals.lww.com/ccejournal/fulltext/2020/12000/association_between_icu_acquired_hypernatremia_and.26.aspx Rate of Correction of Hypernatremia and Health Outcomes in Critically Ill Patients https://pubmed.ncbi.nlm.nih.gov/30948456/ Edelman IS, Leibman J, O’Meara MP and Birkenfeld LW. Interrelations between serum sodium concentration, serum osmolarity and total exchangeable sodium, total exchangeable potassium and total body water. JCI 1958. This classic paper calculates the total body exchangeable sodium and potassium and establishes the relationship between these. Understanding this painstacking work helps understand the effect of supplementing potassium in the setting of hyponatremia.  https://dm5mi…

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