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Dialysis is the life saving medical treatment that sustains patients whose kidneys have failed.
Dialysis treatments are also called 'renal replacement therapy' as dialysis replaces (most) of the functions of the kidney, which is called the renal organ.
Hemodialysis is the form of dialysis most often used in both hospital and out patient settings. Hemodialysis uses a filter to help provide the blood-cleansing action lost when the kidneys are diseased or injured.
The kidneys are two organs in the low to mid back behind the abdominal cavity, that clear the bloodstream of waste products such as urea and salts. The kidneys serve several other important functions including helping to maintain normal blood pressure. The kidneys also produce a hormone important to regulating the red blood cell count. Patients with kidney failure often become anemic as the kidneys stop producing the hormone erythropoeitin (EPO). The kidneys also produce the active form of Vitamin D, which is deficient when the kidneys fail.
Dialysis is a means of clearing the blood of waste products and excess water that builds up between dialysis treatments. Hemodialysis filters the blood using special artifical kidneys, known as dialyzers, through which the blood circulates during treatments. Dialysis can also be done through a catheter placed in the abdominal cavity (peritoneal cavity), which is called peritoneal dialysis. Hemodialysis treatments are most often performed in a hemodialysis out-patient center center, with hemodialysis treatments performed for approximately four hours three times per week (treatment times may vary). Some patients perform home dialysis, most often using peritoneal catheters. Home hemodialysis and in-center nocturnal hemodialysis are newer hemodialysis delivery methods preferred by some kidney patients.
The best mode or type of dialysis for a patient may change over time. Dialysis is often a long term process, which involves cooperation, input and management between the patient and the dialysis providers.
Author Interviews: hemodialysis
- Dialysis - ESRD - CKD |
| Parathyroidectomy for the attainment of NKF-K/DOQI™ and KDIGO recommended values for bone and mineral metabolism in dialysis patients with uncontrollable secondary hyperparathyroidism. |
| Bisphosphonate Therapy, Death, and Cardiovascular Events Among Female Patients With CKD: Dr. Perkins |
| Losartan prevents the development of the pro-inflammatory monocytes CD14+CD16+ in hemodialysis : Dr. Merino |
| Does Dialysis Modality Influence the Oxidative Stress of Uremia? : Dr. Capusa |
| Treatment of Periodontal Diseases Reduces Inflammation in Hemodialysis : Dr. Siribamrungwong |
| Declining Rates of Deceased Donor Renal Transplantation in the US Over Successive Years of Listing: Dr. Trivedi |
| When Is the Best Moment to Assess the Ankle Brachial Index: Pre- or Post-Hemodialysis?Dr. RM Elias |
| Role of Race and Poverty on Steps to Kidney Transplantation in the Southeastern US |
| Validity & Reliability of the MUST and MST Nutrition Screening Tools in Renal Inpatients : C. Lawson |
| Target-Orientated Algorithm for Regional Citrate-Calcium Anticoagulation in Extracorporeal Therapies: Dr. Brandl |
| Evaluation of bone microarchitecture by HR-pQCT in hemodialysis : Dr. Negri |
| Erectile Dysfunction in Chronic Hemodialysis : Dr. Strippoli |
| Have Renal Dietitians Successfully Implemented Evidence-Based Guidelines Into Practice? E. Joy |
| Regional Citrate Versus Heparin Anticoagulation for CRRT: Drs. Tam & Wu |
| von Willebrand factor predicts mortality in CRRT : Dr. Péquériaux |
| Clinical Outcome of Twice-Weekly Hemodialysis Patients in Shanghai | Dr. Qian |
| Persistently low intact PTH levels predict aortic arch calcification progression in hemodialysis patients : Dr. Song |
| Lack of Awareness among Future Medical Professionals about the Risk of Consuming Hidden Phosphate-Containing Processed Food & Drinks : Dr. Razzaque |
| 51Cr-EDTA plasma & urinary clearance as a measure of residual renal function in dialysis :Dr. Kjaergaard |
| Obesity and Mortality Risk among Younger Dialysis Patients: Dr. Hoogeveen |
| Solar-Assisted Hemodialysis: Dr. Agar |
| Hydrogen sulfide inhibits high glucose-induced matrix protein synthesis by activating AMP-activated protein kinase in renal epithelial cells Drs. Lee & Kasinath |
| Mineral, bone disorders, survival in hemodialysis with & without PKD : Drs. Molnar & Kalantar-Zadeh |
| Hydrogen sulfide inhibits high glucose-induced matrix protein synthesis by activating AMP-activated protein kinase in renal epithelial cells Drs. Lee & Kasinath |
| Mineral, bone disorders, survival in hemodialysis with & without PKD : Drs. Molnar & Kalantar-Zadeh |
| Downregulation of the renal & hepatic hydrogen sulfide-producing enzymes and capacity in CKD - Dr. Vaziri |
| A predictive algorithm for management of anemia in hemodialysis based on ESA pharmacodynamics : Dr. Lines |
| Factors Associated With Intradialytic Systolic Blood Pressure Variability: Dr. Flythe |
| Safety and predictors of complications of renal biopsy in the outpatient setting : Dr. Jiang |
| Heparin induced antibodies in chronic hemodialysis patients and cardiac surgery patients: Dr. Shavit |
| Atrial Fibrillation in Medicare/Medicaid-eligible dialysis patients: Dr. Wetmore |
| Newly identified anorexigenic adipokine nesfatin-1 in hemodialysis patients: J. Saldanha |
| Correction of Post kidney Transplant Anemia Reduces Progression of Allograft Nephropathy: Dr. Choukrou |
| Mild and moderate pre-dialysis CKD is associated with increased coronary artery calcium: Dr. Budoff |
| Endogenous factors modified by hemodialysis and accuracy of blood glucose-measuring device: Dr. Ogawa |
| Narrow-band UVV increases serum vitamin D levels in hemodialysis patients Dr. Ala-Houhala |
| Predicting hospital cost in CKD patients through blood chemistry values: Dr. Bessette |
| Nutritional vitamin D supplementation in hemodialysis: a potential vascular benefit? D. Mason |
| Volume excess in chronic hemodialysis effects of treatment frequency & treatment spacing : Dr. Schneditz |
| Acid reduction with fruits/veges or bicarb attenuates kidney injury in hypertensive nephropathy with reduced GFR |
Predicting Number of US Medical Graduates Entering Adult Nephrology Fellowships
Using Search Terms Dr. Desai |
| Potential influence of sevelamer hydrochloride on responsiveness to ESAs in hemodialysis patients: Dr. Ikee |
| Anemia Management in Dialysis : ESAs vs Transfusions: Clinical & Economic Consequences :Dr. Naci |
| Increased risk of death and de novo chronic kidney disease following reversible acute kidney injury: Dr. Perkins |
| Filtration Markers May Have Prognostic Value Independent of Glomerular Filtration Rate : Dr. Tangri |
| Stopping Renin-Angiotensin System Inhibitors in Chronic Kidney Disease: Predictors of Response |
| Insights into nephrologist training, clinical practice, and dialysis choice: Dr. Mehrotra |
| Early ACE inhibition in Alport syndrome delays renal failure and improves life expectancy: Dr. Gross |
| Blunted insulinemia using high dialysate glucose concentration during hemodialysis : Dr. Schneditz |
| Prevalence of Inadequate Platelet Inhibition by Clopidogrel in Patients Receiving Hemodialysis: Dr. Alexopoulos |
| Live kidney donation: attitudes towards donor approach, motives and factors promoting donation: Dr. Mazaris |
| High-dose ESAs, inflammatory biomarkers, and soluble erythropoietin receptors : Dr. Inrig |
| Association of AKI with Adverse Outcomes in Burned Military Casualties : Dr. Stewart |
| Sodium Intake, ACE Inhibition, and Progression to ESRD Dr. Ruggenenti |
| Phosphorus Management Trends of Hemodialysis Patients in a Large Dialysis Organization: Dr. Heise |
| Changes in FGF23 during treatment of secondary PTH with alfacalcidol or paricalcitol : Dr. Hansen |
| Dialysis Modality and Outcomes in Kidney Transplant Recipients: Dr. Mehrotra |
| Comparative Effects of ACE Inhibition and ARB on Inflammation during Hemodialysis Dr. Ikizler |
| Inflammation and the paradox of racial differences in dialysis survival: Dr. Crews|ASN Press Release on Dialysis Survival |
DOPPS Practice Monitor: Update on Trends in US Hemodialysis Care Following Launch of Bundled Payment System and Revisions to ESA Labels January 6 2011 |
Emerging trends in hemodialysis care through August 2011, based on a sample of US dialysis facilities, are included in the latest update to the DOPPS Practice Monitor (DPM, at http://www.dopps.org/DPM), run by the Dialysis Outcomes and Practice Patterns Study (DOPPS) at Arbor Research Collaborative for Health.
Ongoing Changes in the US Dialysis Environment – Recent changes in dialysis payment and regulatory guidance are expected to affect hemodialysis practice. In January 2011, the Centers for Medicare & Medicaid Services (CMS) launched a new Prospective Payment System (PPS) with the intent to control dialysis costs through bundled payments. In June 2011, the FDA approved revised prescribing information for erythropoiesis-stimulating agents (ESAs), used to treat anemia in most dialysis patients. Previously, the label recommended a hemoglobin target range of 10-12 g/dL. The June 2011 update removed the target range, advising instead to start ESA therapy for dialysis patients at hemoglobin less than 10 g/dL, and to reduce or interrupt the dose when the hemoglobin approaches or exceeds 11 g/dL.
Most Recent Trends in Care – Over the August 2010 to August 2011 time period, many hemodialysis practices have remained stable; examples include nutrition measures and hemodialysis treatment time and dose. There have been notable trends in the following practice areas:
- Anemia: Hemoglobin levels have decreased since the June 2011 ESA label update. While the mean hemoglobin level declined by 0.12 g/dL over 12 months from August 2010 to July 2011, it declined in August 2011 by another 0.10 g/dL to 11.26 g/dL. The percentage of patients with hemoglobin levels greater than 12 g/dL declined sharply (from 28% to 23%) in July/August 2011, while the percentage with hemoglobin levels less than 10 g/dL increased slightly from 8.5% to 10% and the percentage with hemoglobin levels less than 9 g/dL remained under 3%.
Mean prescribed epoetin dose (among patients receiving epoetin) decreased by 15%, from 21,100 units/wk to 17,900 units/wk, from August 2010 to August 2011, with the greatest decline in June-August 2011. Epoetin doses at the higher end of the dose range have decreased most notably. IV iron use increased from August 2010 to August 2011 though has recently stabilized. In keeping with greater IV iron use, serum ferritin levels (indicative of iron stores) continue to rise. Serum ferritin concentration exceeded 500 ng/mL in 65% of patients, 800 ng/mL in 34% of patients, and 1,200 ng/mL in 11% of patients in August 2011.
- Mineral & Bone Disorder: In our last report, we noted a 29% increase in serum parathyroid hormone (PTH) levels through April 2011, and differences by race were described. Since then, PTH levels have remained stable or declined slightly in both black and non-black patients. In August 2011, 22% of black patients and 12% of non-black patients had very high PTH values (defined here as PTH >600 pg/mL). The percentage of hemodialysis patients for whom PTH is measured has declined slightly since August 2010. There have been no clear changes in serum calcium or serum phosphorus levels.
- Clinical Outcomes: Preliminary data indicate that the 30-day hospitalization rate has increased somewhat from August 2010 to August 2011. The DPM does not report yet on trends in red blood cell transfusions, as dialysis units are often unaware of transfusions occurring in the inpatient setting. Additional efforts to comprehensively monitor trends in transfusions are warranted. To date mortality rate has not changed appreciably, though further follow-up time is necessary as we continue to track this outcome.
Future monitoring of these trends, confirmation with national data when eventually available, and understanding their effect on clinical outcomes, if any, is required.
DPM data are aggregated across dialysis organizations and facilities. Aggregated trends may not reflect trends in individual dialysis organizations or facilities, and are not intended to provide oversight of performance in individual dialysis organizations or facilities.
Read the rest of the DOPPS Practice Monitor: Update on Trends in US Hemodialysis Care Following Launch of Bundled Payment System and Revisions to ESA Labels Press Release |
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Hemodialysis Research Interview of the Week |
Author Interview: Dr. Len Usvyat PhD
Clinical Systems Database Senior Analyst
Renal Research Institute
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Seasonal Variations in Mortality, Clinical, and Laboratory Parameters in Hemodialysis Patients: A 5-Year Cohort Study.
Usvyat LA, Carter M, Thijssen S, Kooman JP, van der Sande FM, Zabetakis P,
Balter P, Levin NW, Kotanko P.
Clin J Am Soc Nephrol. 2011 Nov 17.
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What are the main findings of the study? |
We found that mortality of hemodialysis patients followed a seasonal pattern over a five year period with the highest mortality in the winter and lowest mortality in the summer months.
We also observed that many clinical and laboratory parameters follow a seasonal pattern in our patient population.
For example, pre-dialysis systolic blood pressures are highest in winter and lowest in summer months; pre-dialysis body temperatures are highest in summer and lowest in winter months.
Neutrophils are highest in winter and lowest in summer suggesting higher inflammatory markers in the winter.
This phenomena was observed in various geographic regions in US.
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Were any of the findings unexpected? |
It has been previously shown that mortality follows seasonal trends in healthy population however these findings were never extended to dialysis patients.
While it was shown that blood pressures tend to follow a seasonal pattern, to the best of our knowledge, it has not been shown that neutrophils or interdialytic weight gains also follow a seasonal pattern.
Additionally, we applied a cosinor analysis to show whether these patterns are statistically significant.
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What should clinicians and patients take away from this study? |
These findings are particularly important in designing studies -- taking season into account is key.
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What recommendations do you have for future studies as a result of your study? |
Further research into understanding the biologic factors that contribute to this seasonality is important.
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