Baby, It’s Hot Outside.

As a person with arthritis among other maladies, I regularly see my rheumatologist. “A rheumatologist is a board certified internist or pediatrician who is qualified by additional training and experience in the diagnosis and treatment of arthritis and other diseases of the joints, muscles, and bones,” according to HSS at https://www.hss.edu/rheumatology-rheumatologist.asp. During my appointment, she mentioned that my GFR (Glomerular Filtration Rate) was 46.

Panic! It’s almost always in the low 50s. She calmed me down by telling me that GFR is usually lower during the Arizona heat (I know, I know: but it’s a dry heat.) of the summer. I don’t know why I was surprised. It made sense.

Think about it. Let me re-enforce this with a statement taken from study on PubMed at https://pubmed.ncbi.nlm.nih.gov/21617334/.

“However, the percent change in eGFR from spring to summer was greater in hypertensive patients with CKD… than in those without CKD …. “

PubMed is part of the National Institutes of Health’s National Library of Medicine’s National Center for Biotechnology Information.

I know hypertension (high blood pressure) is included in this statement, but the fact that GFR is lowered t than it’s lowered in those without hypertension leads us to the realization that those without hypertension DO have lower GFRs during the summer heat.

Another study from EuropePMC at https://europepmc.org/article/med/28946962 tells us:

“Recurrent dehydration in people regularly exposed to high temperatures seems to be resulting in an unrecognised cause of proteinuric chronic kidney disease, the underlying pathophysiological mechanism of which is becoming better understood. However, beyond heat waves and extreme temperatures, there is a seasonal variation in glomerular filtration rate that may contribute to the onset of renal failure and electrolyte disorders during extremely hot periods.”

Here are a couple of definitions you may need to understand the above statement. The first is from The Mayo Clinic at https://www.mayoclinic.org/symptoms/protein-in-urine/basics/definition/sym-20050656.

“Protein in urine — known as proteinuria (pro-tee-NU-ree-uh) — is excess protein found in a urine sample. Protein is one of the substances identified during a test to analyze the content of your urine (urinalysis).

Low levels of protein in urine are normal. Temporarily high levels of protein in urine aren’t unusual either, particularly in younger people after exercise or during an illness.

Persistently high levels of protein in urine may be a sign of kidney disease.”

The following definition is from MedicineNet at https://www.medicinenet.com/script/main/art.asp?articlekey=10691.

“Pathophysiology: Deranged function in an individual or an organ due to a disease.”

So, it looks like dehydration is a key factor in lowering the GFR during the summer heat. We know that dialysis patients need to limit their liquid intake, but what about those of us who are not on dialysis but do have CKD (Chronic Kidney Disease)?

I went to MedicalNewsToday at https://www.medicalnewstoday.com/articles/153363#symptoms for some facts about dehydration:

“Around three-quarters of the human body is water.

The causes of dehydration include diarrhea, vomiting, and sweating.

Individuals more at risk of dehydration include athletes, people at higher altitudes, and older adults.

Early symptoms of dehydration include dry mouth, lethargy, and dizziness.”

Did you notice “sweating” and for those of a certain age like me “older adults”?

So, I gather I’m sweating out more liquids than I’m taking in. But how does that work exactly? I thought I was drinking sufficient amounts of fluid.

Biology Online at https://www.biologyonline.com/dictionary/sweating was a bit of an eye opener.

“Sweating is a way of our body to regulate body temperature. It is commonly used as a synonym for perspiration but in stricter sense perspiration pertains to the water loss as a cooling mechanism of the body and therefore It (sic) includes both the release of watery, salty fluid through the pores of the skin from the sweat glands and the evaporation of water from the skin (trans-epithelial) and respiratory tract. Thus, there exist two forms of perspiration, the sensible and the insensible water loss. In sweating, the process always entails the loss of both water and solutes…. The salty fluid is secreted as droplets or moist on the skin and is called as sweat. Environmental cues that could stimulate the body to produce sweat are high temperature and humidity of the surroundings.”

Oh, solutes. Those include the electrolytes that are so important to us as CKD patients. Orthology at https://orthology.com/myth-debunked-need-electrolytes-work/ offers us a simple explanation:

“The warmer the weather and the more you sweat, the more likely you’ll need electrolyte replacement. Again, this is just a general guideline and will differ by individual, activity and other factors. Pay attention to signs that your electrolyte levels are too low, such as muscle cramps, fatigue, dizziness, nausea or mental confusion.”

Aha, it’s excessively hot out. We drink more, but more sweat is being produced the higher the temperature is. When we sweat or perspire (since the two words are often used interchangeably), we are also exuding electrolytes. Now it all makes sense. An imbalance of electrolytes could lower your GFR. I turned to Tampa Cardio at https://tampacardio.com/causes-electrolyte-imbalance-body/ for confirmation.

“Electrolyte imbalances can cause a wide range of symptoms, some mild and some potentially life threatening. Electrolyte imbalances are commonly caused by loss of fluids through prolonged diarrhea, vomiting, sweating or high fever.”

But we’re already having problems with our electrolytes. No wonder excessive heat affects our GFR. As the University of Michigan’s Michigan Medical at https://www.uofmhealth.org/conditions-treatments/kidney/fluid-and-electrolyte-disorders states:

“Changes in the body’s levels of minerals including potassium, magnesium, calcium and sodium—and the corresponding impact these have on the body’s function, muscle strength and heart rhythm can be associated with disorders of kidney or endocrine glands.

Got it. Let’s all just stay in the air conditioning so we don’t lower our GFRs even more than the excessive heat does. In Arizonia, that probably means until November this year. That was a joke (I hope).

Until next week,

Keep living your life!

It’s the Heat AND the Humidity

Hawaii is so beautiful… and Maui so healing. There was just one thing, though. I somehow managed to forget how humid it is. As you may or may not remember, after we’d come back from the Caribbean and from San Antonio last year, I vowed never to go to a humid climate during the summer again. Well, Maui was Bear’s 71st birthday present so maybe that’s why I so conveniently forgot my vow.

Here’s why I shouldn’t have. This is updated from SlowItDownCKD 2016.

ResearchGate at https://www.researchgate.net/publication/263084331_Climate change and Chronic Kidney Disease published a study from the Asian Journal of Pharmaceutical and Clinical Research from February of 2014 (That’s over three years ago, friends.) which included the following in the conclusion:

“Our data suggest that burden of renal diseases may increase as period of hot weather becomes more frequent. This is further aggravated if age advanced and people with chronic diseases like diabetes and hypertension.”

That makes sense, but how will this happen exactly? I included this June, 2010, article in The Book of Blogs: Moderate Chronic Kidney Disease, Part 1. Apparently, heat (and humidity) has been an acknowledged threat to our kidneys for longer than we’d thought.

“.…Dr. HL Trivedi of the Institute of Kidney Diseases and Research Centre (IKDRC) said, ‘…. Rapid water loss causes the kidney’s functioning to slow down, resulting in temporary or permanent kidney failure.’ Extreme heat causes rapid water loss, resulting in acute electrolyte imbalance. The kidney, unable to cope with the water loss, fails to flush out the requisite amount of Creatinine and other toxins from the body. Coupled with a lack of consistent water intake, this brings about permanent or temporary kidney failure, explain experts.”

The article can be viewed directly at http://www.dnaindia.com/health/report_heat-induced-kidney-ailments-see-40pct-rise_1390589 and is from “Daily News & Analysis.”

By the time this book’s twin, The Book of Blogs: Moderate Chronic Kidney Disease, Part 2, was ready for publication, the (then) spokesman for The National Kidney Foundation – Dr. Leslie Spry – had this to say about heat and humidity:

“Heat illness occurs when body temperature exceeds a person’s ability to dissipate that heat and is commonly diagnosed when the body temperature approaches 104 degrees Fahrenheit and when humidity is greater than 70 percent. Once the humidity is that high, sweating becomes less effective at dispersing body heat, and the core body temperature begins to rise.”

The entire article is at http://www.huffingtonpost.com/leslie-spry-md-facp/heat-illness_b_1727995.html.

Oh, so humidity affects sweating and body heat rises. Humidity greater than 70%. That covers almost the entire time we were in the Caribbean and Texas (and now Hawaii). Well, what’s the connection between heat illness and CKD then?

The CDC offers the following advice to avoid heat illness:

“People with a chronic medical condition are less likely to sense and respond to changes in temperature. Also, they may be taking medications that can worsen the impact of extreme heat. People in this category need the following information.
• Drink more water than usual and don’t wait until you’re thirsty to drink.
• Check on a friend or neighbor, and have someone do the same for you.
• Check the local news for health and safety updates regularly.
• Don’t use the stove or oven to cook——it will make you and your house hotter.
• Wear loose, lightweight, light-colored clothing.
• Take cool showers or baths to cool down….”

Uh-oh, we’re already in trouble. Look at the first suggestion: our fluid intake is restricted to 64 oz. (Mine is, check with your nephrologist for yours.) I know I carefully space out my fluids – which include anything that can melt to a liquid – to cover my entire day. I can’t drink more water than usual and, sometimes – on those rare occasions when I’ve been careless – have to wait until I’m thirsty to drink.

Diabetes is the foremost cause of CKD. I was curious how heat affected blood sugar so I popped over to Information about Diabetes at http://www.informationaboutdiabetes.com/lifestyle/lifestyle/how-heat-and-humidity-may-affect-blood-sugar and found this:

1. If our body is low on fluids, the kidneys receive less blood flow and work less effectively. This might cause blood glucose concentrations to rise.
2. If someone’s blood sugar is already running high in the heat, not only will they lose water through sweat but they might urinate more frequently too, depleting their body’s fluids even more.

There’s more at the website if this interests you.

According to the U.S. Department of Veterans’ Affairs at https://www.visn9.va.gov/VISN9/news/vhw/summer07/humidity.asp,
“Hot weather can lead to dehydration, heat exhaustion and heat stroke, but the dangers increase when you add humidity to the mix. When the temperature rises above 70F and the humidity registers more than 70 percent, you need to be on the alert.

Who’s most at risk?
People with high blood pressure, heart disease, lung disease or kidney disease (I made that bolded.) are most vulnerable to the effects of humid conditions, as are those over age 50. Other risk factors that can affect your body’s ability to cool itself include being obese; having poor circulation; following a salt-restricted diet; drinking alcohol; having inefficient sweat glands; and taking diuretics, sedatives, tranquilizers or heart or blood pressure medication.”

So, pretty much, the way to deal with heat and humidity having an effect on your (and my) CKD is to avoid it. That doesn’t mean you have to move, you know. Staying in air conditioning as long as you can so your body is not overheated and can better handle this kind of weather will help. Wearing a hat and cool clothes will also help. I certainly relearned the value of wearing cotton this past week. It’s a fabric that breathes. I’ll bet that this is how those CKD patients who live in humid areas deal with it. Feedback, anyone? Robin? Mark?

Now for some great, unrelated news: One of our daughters gave Bear the best birthday present. She and her husband FaceTimed us in Maui on Bear’s birthday to tell us we’re going to be grandparents. This is a first for them… and for us. To make this even better – as if that were possible – little one is expected on our anniversary. I love the ebb and flow of the universe, don’t you?

Until next week,
Keep living your life!

Baby, It’s Hot Outside

I just caught up to the fact that it’s June.  No, it wasn’t the calendar that told me, but the temperature.  We live in Arizona and its hot, dry heat or not.  That means cooling off any way you can. IMG_0584

This weekend, we finally took the three hour round trip drive to visit my friend and her family.  Her five year old daughter proudly showed off the family’s new addition since I’d been there last – a wonderful, cooling swimming pool.  I was tempted, but the 105% temperature kept me inside with the air conditioning.

That’s when I was offered some filtered water.  Did I want ice? I was asked.  I immediately shook my head.  “CKD, no ice, please.”

My friend cocked her head.  Her father had had a kidney transplant so she was well aware of the renal diet.  True, her father was treated in Korea, so there might have been some differences in treatment, but ice?

She asked me why and I immediately knew what I was going to blog about today.

For years, I’ve misunderstood something my nephrologist said.  I heard, “Don’t use ice.”  What he really said was something like, “If you use ice, you need to count the cubes in your fluid intake.”

I’ve spent time since Saturday researching the ice question and found nothing about avoiding ice.  I did find one warning about cold beverages from DaVita at http://www.davita.com/kidney-disease/overview/living-with-ckd/seven-summertime-precautions-for-people-with-kidney-disease/e/4894 : “Be careful of very cold beverages, which can cause stomach cramps.”

The lesson I learned from this misunderstanding of what I thought I heard is to recheck what you think you know every once in a while.  After all, I thought I had the diet down pat.

Hah!  I forgot that I was terrified when I was first diagnosed and thinking I was going to die imminently. I adhered strictly to what I heard and, apparently, adhered just as strictly to what I thought I’d heard.

sun-graphic1Wait a minute… maybe I need not have avoided the heat, either.  I researched that, too.  Just as with ice, I found a general warning about the elderly, but nothing specific to CKD.

““With the elderly, the heat accumulates in their bodies over hours to days. If you have a long heat spell, the elderly person accumulates heat through each of those days because they can’t really eliminate or dissipate the heat,” explains Dr. Crocker. “Sometimes it’s because of a medication, sometimes it’s a lack of mobility, or in some cases the older you get, the less active your sweat glands are, so it becomes harder and harder for you to eliminate heat.”

This is from The Austin Diagnostic Clinic at http://www.adclinic.com/2012/08/hot-summer-days-challenging-dangerous/#.U5X-ZKROUY0.

By the way, National Public Radio (NPR) has a fascinating blog about the term ‘elderly’ at http://www.npr.org/2013/03/12/174124992/an-age-old-problem-who-is-elderly.  While 65 was the accepted age for elderly here in the USA for quite some time, this is now under debate.  I, however, still envision an elderly person as frail and delicate… something I’m not.

But, again, there was nothing specific to CKDers in the quote above.  In thinking about it, I began to wonder if the risk of dehydration from the summer heat is the problem for us.

According to The National Kidney Fund at http://www.kidney.org/atoz/content/kidneysnottowork.cfm

“Kidneys can become damaged if they are not getting good blood flow. This can happen if you become dehydrated or seriously ill.”

Aha!  This was starting to make sense.  WebMD at http://www.webmd.com/fitness-exercise/tc/dehydration-topic-overview explains this for us.

“Usually your body can reabsorb fluid from your blood and other body tissues. But by the time you become severely dehydrated, you no longer have enough fluid in your body to get blood to your organs, and you may go into shock, which is a life-threatening condition.”ice water

Okay, so we know we need to drink fluids, especially in hot water. Our kidneys are already having a hard time cleaning our blood effectively and we are reabsorbing ineffectively cleaned blood prior to this point of dehydration.

But how do we know if we’re becoming dehydrated? What are the symptoms? I turned to my standby, the Mayo Clinic at http://www.mayoclinic.org/diseases-conditions/dehydration/basics/symptoms/CON-20030056 for the symptoms of mild dehydration:

  • Dry, sticky mouth
  • Sleepiness or tiredness — children are likely to be less active than usual
  • Thirst
  • Decreased urine output
  • No wet diapers for three hours for infants
  • Few or no tears when crying
  • Dry skin
  • Headache
  • Constipation
  • Dizziness or lightheadedness

And then I laughed.  I experience one or more of those symptoms at one time or another.  The clinic does make the extremely helpful point that the color of your urine is a good indicator of dehydration. If it’s clear or light in color, you’re fine.  If it’s dark, start drinking!  Interestingly enough, having CKD is already a risk factor for dehydration so let’s not make it worse for ourselves.

So how do we prevent dehydration?  What can we do if we can see if starting?

Obviously, drinking more fluids will help. I’m limited to 64 ounces in a day, but I get creative in summer. Sometimes, I will have that half cup of ice cream.  Watermelon magically (hah!) appears on the table.  Now that I realize I don’t have to avoid ice, they too will become part of both the anti-dehydration campaign and the anti-dehydration campaign in our house.watermelon

I’m not sure if this is common knowledge, but dehydration can also cause kidney stones.  If you don’t have the fluid in your body to prevent crystallization, crystallization is more apt to happen.  Kidney stones are,

“Stones caused in the urinary tract and kidney when crystals adhere to each other.  Most of those in the kidneys are made of calcium.”

(Love this author’s style).  That’s from What Is It And How Did I Get It? Early Stage Chronic Kidney Disease, p. 133.

Talking about the book, it’s clear that digital outsells print and that in foreign markets, England outsells other countries.  I wonder if it’s the languages.  I’d thought about translations, but how would I be able to edit the texts if I don’t know the languages myself?  I’ve tried online translation, but the results are never quite what I originally wrote in English.

May you stay cool and hydrated.

Until next week,

Keep living your life!Book Cover