Info on dehydration symptoms:
http://shar.es/PF9R6
Dehydration
Moderators: Rosie, Stanz, Jean, CAMary, moremuscle, JFR, Dee, xet, Peggy, Matthew, Gabes-Apg, grannyh, Gloria, Mars, starfire, Polly, Joefnh
Dehydration
Theresa
MC and UC 2014
in remission since June 1, 2014
We must all suffer one of two things: the pain of discipline or the pain of regret. ~Jim Rohn
MC and UC 2014
in remission since June 1, 2014
We must all suffer one of two things: the pain of discipline or the pain of regret. ~Jim Rohn
Most of the information on that site appears to be correct — except for the blood pressure connection. They make the same mistake that most website "experts" make, by arguing that dehydrated blood becomes thicker, and therefore more viscous, which raises BP. Unfortunately, that claim is based on an incomplete analysis, and failed logic. They completely overlook the issue of hypovolemia (low blood volume). Hypovolemia can be caused either by blood loss or by loss of body fluids, and if hypovolemia reaches a serious level, it can result in life-threatening hypovolemic shock, of course. At any rate, dehydration causes hypovolemia, and we already know that hypovolemia causes low BP, not high BP.
The blood circulatory system is a closed system, and while it's true that the body makes adjustments for volume changes by constricting blood vessels or dilating them in order to attempt to maintain relatively constant internal volume, in the real world few processes work perfectly. And especially as we age, we tend to lose endothelial function (our blood vessels become less elastic), and as a result, they become less able to dilate fully, or to shrink fully. The development of atheroschlerosis exacerbates the problem.
As a result, dehydrated blood is associated with a lower blood pressure, not higher BP. I have an ileostomy, and as anyone who has one can tell you, it's very easy to become dehydrated with an eleostomy, because a colon is no longer available to recycle water. Because I have been diagnosed as a stroke risk, I take a BP-lowering drug (a minimal dose of lisinopril), and a blood thinner (clopidogrel). But since I don't actually have hypertension, I have to check my BP regularly, so that I will know to skip the pills if my systolic BP is too low (below 100). Because of the loss of water due to perspiration, my BP always averages lower in the summer than in the winter. I can always tell when I am dehydrated, even if I don't notice any clinical symptoms, because my BP readings will be lower than normal. And this was true before the ileostomy, but of course the ileostomy makes it more obvious, because of the loss of recycled water.
Anyway, my point is, I'll guarantee that your blood pressure will decline as dehydration develops. And once you are dehydrated, if you drink water, your BP will rise as your blood absorbs additional water — just the opposite of what virtually all website authorities claim about the effects of dehydration on BP. All the "authorities" apparently read the same explanations by internet doctors (explanations that are based on assumptions that are correct so far as they go, but they overlook hypovolemia), so they all cite the same incorrect logic, and display the same incorrect information.
Sorta like the fictitious claims that "eating fat makes you fat", and "eating cholesterol raises your cholesterol level", that continue to be perpetuated on the internet.
Please don't interpret this post as a condemnation of that particular website, because they have plenty of company — there are many, many other websites that make the same incorrect claims about the association of dehydration and BP. I haven't searched, but frankly the problem is so ubiquitous, that I doubt that I could find a website that presents an accurate explanation of the relationship between dehydration and BP. Other than this point, the information there appears to be good.
Tex
The blood circulatory system is a closed system, and while it's true that the body makes adjustments for volume changes by constricting blood vessels or dilating them in order to attempt to maintain relatively constant internal volume, in the real world few processes work perfectly. And especially as we age, we tend to lose endothelial function (our blood vessels become less elastic), and as a result, they become less able to dilate fully, or to shrink fully. The development of atheroschlerosis exacerbates the problem.
As a result, dehydrated blood is associated with a lower blood pressure, not higher BP. I have an ileostomy, and as anyone who has one can tell you, it's very easy to become dehydrated with an eleostomy, because a colon is no longer available to recycle water. Because I have been diagnosed as a stroke risk, I take a BP-lowering drug (a minimal dose of lisinopril), and a blood thinner (clopidogrel). But since I don't actually have hypertension, I have to check my BP regularly, so that I will know to skip the pills if my systolic BP is too low (below 100). Because of the loss of water due to perspiration, my BP always averages lower in the summer than in the winter. I can always tell when I am dehydrated, even if I don't notice any clinical symptoms, because my BP readings will be lower than normal. And this was true before the ileostomy, but of course the ileostomy makes it more obvious, because of the loss of recycled water.
Anyway, my point is, I'll guarantee that your blood pressure will decline as dehydration develops. And once you are dehydrated, if you drink water, your BP will rise as your blood absorbs additional water — just the opposite of what virtually all website authorities claim about the effects of dehydration on BP. All the "authorities" apparently read the same explanations by internet doctors (explanations that are based on assumptions that are correct so far as they go, but they overlook hypovolemia), so they all cite the same incorrect logic, and display the same incorrect information.
Sorta like the fictitious claims that "eating fat makes you fat", and "eating cholesterol raises your cholesterol level", that continue to be perpetuated on the internet.Please don't interpret this post as a condemnation of that particular website, because they have plenty of company — there are many, many other websites that make the same incorrect claims about the association of dehydration and BP. I haven't searched, but frankly the problem is so ubiquitous, that I doubt that I could find a website that presents an accurate explanation of the relationship between dehydration and BP. Other than this point, the information there appears to be good.
Tex
It is suspected that some of the hardest material known to science can be found in the skulls of GI specialists who insist that diet has nothing to do with the treatment of microscopic colitis.
Thanks Tex, I thought the BP was exactly opposite, mine was very low when I was dehydrated and now it's back to being a little above normal.
I know the worry about being dehydrated is very real when we are dealing with daily WD. There was a discussion in another thread about symptoms of dehydration. I only recently learned about the headaches, which I never had before, they can be eased almost immediately by a glass of water. What I thought was interesting was all the various aches and pains that can be caused by this.
I know the worry about being dehydrated is very real when we are dealing with daily WD. There was a discussion in another thread about symptoms of dehydration. I only recently learned about the headaches, which I never had before, they can be eased almost immediately by a glass of water. What I thought was interesting was all the various aches and pains that can be caused by this.
Theresa
MC and UC 2014
in remission since June 1, 2014
We must all suffer one of two things: the pain of discipline or the pain of regret. ~Jim Rohn
MC and UC 2014
in remission since June 1, 2014
We must all suffer one of two things: the pain of discipline or the pain of regret. ~Jim Rohn
