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!

Deep in the Heart of Texas

Last week I wrote that I’d tell you about our Texas trip this week and that’s just what I’ll do… sort of. We were in San Antonio for the Air Force Basic Training Graduation of a close family friend. I hadn’t wanted to go. The rest of the family was driving 14 hours straight. I thought they were insane.

It turned out I was right about that, but I am glad I went anyway.  The next day, our friend proposed to his girlfriend – who just happened to be our daughter – at The Riverwalk’s Secret Waterfall, Airmen escort and all. THAT was worth the ride. And we got to know his family better, understand them more, and value their company.  As they say in the ad, secret“Priceless.”

There was only one fly in the ointment. While the temperature was manageable for us since we live in Arizona, the humidity was not for the same reason. For my other than U.S. readers (and there are quite a few of them since I have 107,000 readers in 106 countries), Arizona’s usual humidity is low, very low. We do have a three minute rainy season in August (Okay, maybe it’s a teensy bit more than three minutes.) when it rises, but that’s not the norm.

Last week, the humidity in San Antonio, Texas, was between 68% and 72%. Even the air conditioning in the hotel bowed before it.  Our Airman had Air Force logoscheduled the entire weekend for us: The Airman’s run on an open field, late lunch at a restaurant with no available indoor seating, graduation on the parade field, an afternoon on The Riverwalk. There’s more, but you get the idea.  All of it outdoors, all of it in 68% to 72% humidity, all of it uncomfortable as can be.

And, it turns out, all of it not great for a Chronic Kidney Disease patient. Why? Well, that’s the topic of today’s blog. 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 two 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.”DIGITAL_BOOK_THUMBNAIL

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) NKF-logo_Hori_OBspokesman 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 Digital Cover Part 2 redone - Copyless 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 Texas. 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.
  • Seek medical care immediately if you or someone you know experiences symptoms of heat-related illness(http://www.cdc.gov/extremeheat/warning.html).”

bottled waterUh-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.

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.  Stay in air conditioning as long as you can so your body is not overheated and can better handle this kind of weather. Wearing a hat and cool clothes will also help. I certainly learned the value of wearing cotton this past week. It’s a fabric that breathes.

What is itUntil next week,SlowItDownCKD 2015 Book Cover (76x113)

Keep living your life!