savory vegetable sandwich

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Predicting Contrast Dye Damage

Cardiac procedures that involve contrast dye, and many do, are dangerous to the kidneys of kidney patients and to those with long-standing diabetes, obesity, high blood pressure or who are older, all of whom likely suffer kidney damage. Unfortunately, heart and vessel issues are also common in these groups of people.

dialysis 20You know from prior posts here, damage to kidneys too often results from contrast dye used in radiology scans. Severe damage results in “contrast-induced nephropathy” (CIN) often requiring dialysis within days.

Doctors can take precautions which sometimes help, such as giving IV fluids before, during, and following the dye procedure. Also, different dyes and dye doses exist, some milder on kidneys. A nephrologist could be involved to evaluate kidney function before the test and communicate with the patient, so the patient can have a choice.

Often, though, the heart issue is immediate, and doctors simply follow the damaging standard of practice. A recent study in the Journal of Cardiology suggests that changes in serum creatinine level and estimated glomerular filtration rate following the dye procedure can predict a patient’s risk of developing CIN.

CIN is defined as a 25% or greater increase in serum creatinine from where it was just before the dye exposure to 48–72 hours after exposure. So, CIN cannot be diagnosed on the day of or even the day after the dye exposure, when many patients undergoing the dye procedure are discharged from the hospital.

The researchers studied 860 patients who underwent cardiac cauterization with dye. They measured creatinine and estimated glomerular filtration rate (eGFR) before catheterization, on the following day, and on the day or two after that.

CIN developed in 40 patients. Creatinine increased significantly from 1.55 to 1.79 mg/dL  the day after the procedure, but returned to normal in those without CIN. Likewise, eGFR decreased significantly (a bad thing) in patients with CIN, but returned to “normal” in those without CIN.

Even a small change in creatinine of 0.1 or eGFR of -1.1 predicts CIN. In fact, researchers said that this small change was associated with up to a 70 times greater odds of CIN.


Posted in Blog, Cardiovascular Disease, Contrast Induced Kidney Damage, Creatinine, Diabetes, Dialysis, GFR, High Blood Pressure, Kidney Disease, Lab Results, Nephrologist, Obesity | Tagged | Leave a comment

Protect Kidneys Against Antibiotic Damage

InjectionResearchers noticed that some hospital patients given two common antibiotics often developed kidney failure, and they decided to take a closer look. They saw that patients receiving vancomycin and piperacillin-tazobactam had increased risk of kidney damage.

Vancomycin is used to treat patients with staph bacteria that are resistant to antibiotics. Piperacillin-tazobactam is a broad-spectrum antibiotic combination. Both are commonly given intravenously in the hospital.

Doctors already know that vancomycin is associated with nephrotoxicity (but still give it to patients — including those with weakened kidneys). The bigger question was whether the combination of vancomycin and piperacillin-tazobactam further increased that risk of kidney damage. The combined antibiotics are frequently used for several types of infections, including skin and soft tissue infections, as well as pneumonia.

The researchers identified 735 Sanford USD Medical Center adult patients who received vancomycin, piperacillin-tazobactam or both during two 3-month periods, one in 2009 and another in 2010. From 2009 to 2010, the procedure for administering piperacillin-tazobactam changed from a 30-minute to a 4-hour infusion time.

More than 20 percent of the 109 patients who received both antibiotics in the shorter infusion time developed acute kidney failure.  Among the 101 who received the drug combination infusion over the longer period, the incidence of kidney failure was 17 percent.

This is significantly higher than the overall 10.5 percent rate of acute kidney failure for all the patients in the study. When only piperacillin-tazobactam was administered, the kidney failure rates decreased to 13.5 percent for the shorter infusion time and 8.4 percent for patients who received the antibiotic over the 4-hour period.

So, piperacillin-tazobactam resulted in more acute renal failure than vancomycin. With vancomycin alone, the kidney failure rate dropped to 4.9 percent.

The researchers performed this study without grants. It shows that hospitals can and should look internally to alternatives to the damaging antibiotics and other hospital drugs they commonly administer. Medical staff too readily give patients drugs without monitoring the patients for resulting kidney, liver, and other damage. If further damage results, medical staff then routinely respond by giving other drugs. What a vicious, damaging scenario where only the patient suffers.



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Infections Dangerous to Heart of Kidney Patients

Avoid Infections!

Avoid Infections!

People with chronic kidney disease (CKD) not only suffer from loss of some or all kidney function but also have numerous related health concerns. One of the most common and serious is the substantially increased risk of developing, and then dying from, heart disease. Heart disease takes the lives of most CKD patients. So, taking steps to protect the cardiovascular system is a necessity.

Protecting the heart includes protecting ourselves from infections. Infections increase the risk of cardiovascular events (CVEs) in patients with CKD, researchers reported at this year’s  European Renal Association-European Dialysis and Transplant Association in London. In fact, the increased risk of CVEs associated with infections is similar in magnitude to having a previous CVE, according to investigators.

Researchers analyzed data from 2,294 kidney patients who had a median age of 70.4 years. Study subjects had an estimated glomerular filtration rate (GFR) of 15–45 mL/min/1.73 m2. That GFR range includes the second half of stage 3 and all of stage 4 of CKD. Researchers followed up with the subjects every six months for three years and then annually for two more years. The researchers defined infections as the use of antibiotics.

A CVE occurred in 281 of those patients (12.1%). the events included ischemic events (7.2%), congestive heart failure (5.6%), and other events (1%). Infections occurred in 480 patients, which is over 21 percent of them.

Significantly more patients with than without infections experienced CVEs (28.5% vs. 19.9%). Overall, compared with patients who had no prior CVE and who did not experience an infection, patients who had an infection had nearly three times increased risk of CVEs.

Patients who had a prior CVE and no infection also had nearly three times increased risk of CVE. Those who did not have a prior CVE but had an infection had over two and a half times increased risk. Patients who had both a prior CVE and an infection had nearly eight times increased risk.

Researchers concluded that development of an infection is an independent risk factor for CVE. Thus, as we advance in CKD, we need to take additional precautions against infections.


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Skin Cancer and Transplant Recipients

With a transplanted kidney, I must take immunosuppressant drugs for life to help prevent rejection of the organ. Such drugs, though, makes it twice as likely for me to develop melanoma as compared to non-transplanted people, and three times more likely to die of the dangerous skin cancer.

According to recent findings reported in the Journal of Investigative Dermatology, the immunosuppressive medications that transplant recipients receive — especially the high doses administered at the time of transplant — make them more susceptible to later stage cancers that are harder to cure. Transplant recipients were four times more likely to be diagnosed with later stage melanoma already spreading to other parts of the body.

The researchers studied 139,991 white transplant recipients in the Transplant Cancer Match Study at the National Cancer Institute.  They found 519 melanomas in this group.

They then compared outcomes among 182 melanoma of those transplanted patients with more than 130,000 other people with melanoma. Over 15 years, 27 percent of the transplant recipients died of their melanoma, as compared to 12 percent of the non-recipients. The researchers found that melanoma patients with a transplant were three times more likely to die from their melanoma, even for melanomas diagnosed at an early stage or were very small.

Risk of aggressive melanomas was highest within the first four years after transplant. Previously, researchers thought that immunosuppressants might act cumulatively, making these cancers more likely after years of taking the drugs. But, the researchers found that late-stage melanomas were associated with use of medication given at the time of transplant to stop T-cells — the main cells of immune response — from functioning to keep them from attacking the new organ.

Some types of cancer are more common among immune-suppressed people, typically cancers linked to viruses like cervical cancer and lymphoma. Melanoma is linked to exposure to ultraviolet rays from the sun rather than to a virus.

Transplant candidates should be screened carefully before transplant surgery to detect melanomas already present and that could spread rapidly when immunosuppressive drugs are given. Also, monitoring after transplant could allow melanoma to be detected earlier, preventing patients from developing deadly metastatic cancer.



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Smoothies Book Helps Readers Improve Kidney Function

Many readers have told us that the wonderful information and recipes in our “Smoothies for Kidney Health” book are helping them increase their kidney function. That is wonderful! Here is a sample of what we’re hearing:

“I am Janice, and I was diagnosed with CKD stage 3 five years ago. I have been spending
hour upon hour on-line looking for support in determining how I could slow down progression of my CKD. I found information on-line confusing and inconsistent. My nephrologist gave me some directionand handouts, but I knew I needed more. I even went to a Davita class, but most attendees were going to start dialysis, so they were the focus of
that class.

Since my retirement last year, I embarked on a whole-hearted effort to commit to daily exercise, cut down on protein potassium and sodium intake, and eat more fruits and vegetables. In April I saw some improvement in my overall lab results but not much.

I then found your Smoothies book and have used it daily. Lo and behold, my labs at the end of June showed a 40% increase in my overall kidney function! My GFR increased by 10 to 53, and many of my lab values that were out of range previously are now in “normal” range. And this great news was just two months after I started using your smoothie recipes once or twice a day! My nephrologist said my results were, and I quote, “fantastic!”

I continue on my healthy track today and am so happy and grateful that you published this well-researched Smoothie book. I thank you from the bottom of my heart for leading me in the direction of better kidney and heart health!”

We thank you Janice for your wonderful comment, and we are delighted by your strengthening kidney function. The “Smoothies for Kidney Health” book (updated from our prior Smoothies book) was reviewed by a nephrologist, cardiologist, and renal dietitian; and it contains a wealth of information on the tie between foods and kidneys. We know first hand that its principles help improve kidney function.

Here is the Amazon link:

Posted in Blog, Cardiovascular Disease, DASH Diet, Diabetes, Dialysis, Eating for Kidneys, Exercising for Kidneys, Food and Kidney Function, High Blood Pressure, Kidney Cancer, Kidney Diet, Kidney Disease, Kidney Stones, Kidney Transplant, Kidneys, Latest Statistics, Nephrologist, Obesity, Real Stories/Real People, Recipes, Taking Charge | Tagged | Leave a comment

Lifestyle Can Half Heart Risk

Senior Couple Jogging In ParkKidney patients know–or should know–that having kidney disease greatly increases risk for cardiovascular disease. That means kidney patients must guard their heart and vessels just as they must guard their remaining (if any) kidney function. Fortunately, what’s good for the heart is good for kidneys. A July 2015 study in JACC: Heart Failure tells us lifestyle matters to the heart.

The study followed 4,500 adults ages 65 and older for two decades. Adults who walked briskly, were moderately active in their leisure time, drank alcohol moderately, didn’t smoke, and avoided obesity had half the risk of heart failure as adults who did not optimize these modifiable lifestyle risk factors. Heart failure is a condition where the heart fails to pump as much blood as the body needs and is a leading cause of hospitalization for people over age 65.

Nearly one-fourth (1,380) of the adults suffered heart failure during the study time period. Participants who optimized four or more of the following healthy behaviors were half as likely to have heart failure as those with zero or one of these:

  • Participating in leisure activities that burned at least 845 calories a week (Adults in the study who walked at a pace 2 miles per hour or faster had a lower risk of developing heart failure.)
  • not smoking
  • modest alcohol intake of one drink or more a week (but not more than 1-2 drinks/day)
  • avoiding obesity

The lead researcher  in the study also noted that “eating a healthy diet is of critical importance for preventing other cardiovascular diseases, type 2 diabetes, and other chronic diseases.” The researchers thought that the DASH diet (Dietary Approach to Stopping Hypertension) might be one such diet. DASH is the eating plan suggested on this site, in our books, and promoted by the National Kidney Foundation.

This study provides evidence to support inexpensive lifestyle interventions to help prevent heart disease. These interventions also can help kidney disease patients.


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Contrast Dye and Transplant Recipients

iStock_000021005038XSmallKidney transplant recipients must carefully guard the health of their donated kidney. So they must think carefully about having any medical procedure that involves contrast dye.

Studies find that recipients undergoing computed tomography (CT scan) or cardiac catheterization with contrast dye may well develop contrast-induced nephropathy (CIN). The following recent study was presentation at the 2015 American Transplant Congress.

Researchers studied 76 contrast exposures (CT scans or catheterizations) in 50 kidney transplant recipients. The average serum creatinine level of these recipients before the procedures was 1.46 mg/dL. CIN is defined as a rise in serum creatinine by more than 0.3 mg/dL or 25 percent from baseline within 4 days of contrast exposure. The researchers identified CIN in 10 of 76 procedures. Over 13 percent of the CT scans and catheterizations resulted in CIN.

The researchers also examined drug risk factors for CIN. Exposure to N-acetylcystein (a drug often given to kidney patients to try to avoid CIN) and a lower hemoglobin level were significantly associated with an increased risk of CIN. Calcineurin inhibitor (tacrolimus or cyclosporine) use was not.

At the last follow-up, CIN did not affect allograft function and survival in the study’s recipients, according to the researchers. Of course, these recipients were not followed very long.

The head researcher noted that: “Contrast-induced nephropathy is associated with a significant increase in mortality and morbidity….Although we often extrapolate what we know about native kidneys to allografts, that might not reflect best practice. Allografts are solitary kidneys that experience significant hemodynamic alterations and kidney recipients are on lifelong immunosuppressive medications. Both of these factors might affect susceptibility to contrast-induced injury.”

The 13 percent incidence of CIN identified in this new study is consistent with previous studies looking at native kidneys.



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Alcohol and Kidney Disease, Again

Red wineWe recently posted about a study about the positive association between moderate drinking and survival in chronic kidney disease (CKD). Numerous studies suggest a little alcohol can extend life and aid kidneys. Other studies differ, though.

A study reported online in August in PLOS One did not find a positive association between moderate alcohol consumption and kidney health. In this Japanese study, men who drink small amounts of alcohol or frequently exercised were at increased risk of renal function decline, regardless of body weight.

Researchers examined data from 7,473 healthy men and women from 1999 to 2008. They gathered information on each participants’ alcohol consumption and exercise frequency. The investigators grouped participants according to gender and body mass index (BMI). None of the subjects had CKD at the beginning of the study.

Men who consumed a small amount of alcohol each week (20 to 140 grams, roughly equivalent to 1 to 7 glasses of sake) were more likely to experience a greater than 25% decrease in eGFR or to develop CKD within 3 years compared with men who drank more than 140 grams per week. Their odds were elevated whether they were normal weight or overweight/obese.

Similarly, men who exercised two or more times a week (more than 30-minute sessions with sweating) also had greater odds of kidney function decline, compared with men who exercised rarely. Men of normal weight and overweight/obesity had greater odds by 41% and 84%, respectively.

The investigators found no correlation between alcohol consumption and exercise frequency and loss of kidney function in the female groups. (We consider that good news as we enjoy a little wine and regularly exercise.)

The researchers noted that exercise may decrease renal cortical blood flow. Exercise may also lead to weight loss with uncertain effects on the kidney. However, most studies strongly support exercise for kidney and heart health.

Future studies should examine types of alcohol–not just sake–and exercises and investigate whether lifestyle adjustments prevent kidney function loss.



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Shall We Toast? Alcohol and Kidney Disease

Red wineLooking for ways within your control to lower risk of chronic kidney disease (CKD)? Could it be that having an alcoholic drink now and then may help?

Researchers in the well-known “Prevention of Renal and Vascular End-Stage Disease” (PREVEND) study observed that alcohol intake lowered risk of CKD in both men and women. This May 2015 study is published in Kidney International. Participants in the study were observed over a period of 10 years. CKD was defined as an estimated glomerular filtration rate (eGFR) lower than 60 ml/min/1.73m2 and/or urinary albumin excretion greater than 30 mg per 24 h.

Compared with non-drinkers, those who drank the most alcohol had about a 67% decreased risk of CKD.  CKD risk for moderate and occasional drinkers was also lower than for non-drinkers.

This relationship was observed among subgroups including those based on age, sex, smoking status, presence of hypertension, and high cholesterol.  The authors indicated that it is premature “to draw any firm conclusions regarding alcohol consumption to reduce the risk of CKD.” Nevertheless, there are “no grounds to discourage light to moderate alcohol consumption at least in terms of its renal effects.”

This new study adds further evidence that alcohol intake may reduce the risk of developing CKD. The study, while certainly not perfect, includes men and women, a relatively large sample size, extended follow-up, use of proven measures to assess kidney function, validation of self-report of alcohol intake, and appropriate recommendations.

Nearly all prior studies suggest that alcohol intake may be protective against loss of kidney function among the general population. These findings are reported from around the world, including the Netherlands, Norway, Japan, Australia, China, and the United States. Findings have been quite consistent, with beneficial effects observed among men and women. The evidence is supported by a large number of studies in cardiovascular disease showing similar relationships.

Before uncorking that champaign, see our upcoming post about a recent study that found alcohol intake did not lower risk of CKD in men, and also speak with your doctor.





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Rishabh’s Dialysis/Transplant Story

Rishabid,who lives in India, shares his story:

My family was informed of gravity of the situation and told that I must be immediately put on dialysis and should target for a transplant. I remained on dialysis for about two months, until I underwent the transplant procedure.

IMG_20150720_163430Prior to being diagnosed with kidney disease, my life was synonymous to merely breathing. For many years, I had a lot of symptoms, such as constant back ache, body pains, nausea, lack of appetite, fatigue, recurring fever, bone disease, recurring nasal infections, burning in my urinary tract. My very existence was excruciatingly painful for me and doing things such as waking up, getting out of bed, getting to college on time, climbing stairs, etc. posed a huge challenge. Life was a struggle for me.

So when I was finally diagnosed with CKD5, I was glad that doctor had been able to determine the underlying cause of all the symptoms.  I could finally get a treatment and live a normal life.

I refused to get a transplant immediately after being diagnosed, even
though I had a donor with a match, because I was in mid-semester of my law
school and didn’t want to jeopardize my final exams. So, I remained on
dialysis temporarily until I could take my final exams. Then I got
the transplant. My sister donated her kidney to me.

It has been six months since the transplant now and life is a bliss.
I am really happy and I feel so good and I can finally enjoy a normal
life. This transplant has truly been the best thing that could have
happened to me. I feel great like I’ve never felt before. Looking
forward to the life ahead of me.

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Lose Excess Weight to Slow CKD

Much research indicates that being overweight is dangerous to kidney function. In fact, high body mass index (BMI) may identify patients who are at increased risk of progressive chronic kidney disease (CKD), British researchers reported at the 52nd congress of the European Renal Association-European Dialysis and Transplant Association in London.


Greater BMI = Poor Kidneys

Researchers studied 31,274 patients with an estimated glomerular filtration rate (eGFR) below 60 mL/min/1.73 m2. (A repeated eGFR below 60 means CKD). Of the individuals studied, 65% had two eGFR results more than 3 months apart, meaning they had CKD. The remaining patients likely did too.

Within the study group, 31% had a BMI of greater than 30 kg/m2 and therefore were obese; 39% were overweight (BMI of 25-30); and only 29% had a normal BMI of 18-25. Study results showed that decline in eGFR, and therefore in kidney function, was greater in the higher BMI categories.

The mean eGFR declined each year in patients who were overweight or obese, compared with no change or even slight increases (improvement) in eGFR in the normal BMI categories. The decline in eGFR in the higher BMI categories was especially pronounced in younger patients with higher levels of proteinuria, according to the investigators.

“The association we found suggests that reducing BMI might slow the progression of CKD,” said the lead researcher. “Lifestyle interventions, such as exercise and dietary programs, are potential areas for intervention in this area, particularly in primary care….”

Previous studies have shown a relationship of BMI and diagnosis of CKD, and have suggested that having a larger than normal waist circumference may be a potential CKD screening tool. This current large study, focused on progression of disease in patients with known CKD, showing that overweight/obese people suffer kidney deterioration more quickly than normal weight folks.

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