Dialysis
Conditions
Keywords
darbepoetin, kidney, dialysis, hemoglobin cycling
Brief summary
This is a human subject research study conducted in patients undergoing dialysis treatment with darbepoetin alfa at Intermountain Utah Dialysis and Intermountain Medical Center Dialysis Services. The purpose is to test a dose recommendation algorithm that may reduce hemoglobin variability and drug cost.
Detailed description
Hemoglobin cycling is an outcome of treating long-term dialysis patients for anemia using erythropoiesis-stimulating agents (ESAs), and represents a conundrum for practitioners. While patients with low hemoglobin levels suffer from anemia, high hemoglobin levels may lead to blood clots and subsequent health risks. The current protocol for ESA dosing often results in suboptimal dosing that leads to hemoglobin cycling, which can have a negative impact on patient survival. To this end, we have developed a personalized method for ESA dosing that controls anemia in dialysis patients that is similar to the commercial product sold by PhySoft. Our method, the Dialysis Anemia Treatment Model, uses a mathematical model for erythropoiesis that takes each patient's physiology into account, predicting the optimal dose of ESA for that patient to prevent hemoglobin cycling. The goal of this computer-aided approach is to reduce hemoglobin cycling and the amount of drug used by predicting optimal doses to keep the patient's hemoglobin within the desired range. This is a human subject research study to validate the model in the clinic and demonstrate that it is able to minimize hemoglobin cycling in patients and reduce the amount of ESA drug administered.
Interventions
PROCEDUREAlgorithm model-based Aranesp doses
Patients will receive doses calculated by the algorithm instead of by the standard of care procedures. Model-based Aranesp doses will be computed at the same time that doses based on the dialysis anemia protocol are determined. The model-based doses will be administered instead of the protocol-based doses and in the same way and at the same time as the protocol-based doses would have been. The model-based dosing will be more flexible than the protocol-based dosing. Some constraints in the protocol-based dosing were created to prevent patients from achieving high Hb levels. The model-based dosing will also prevent these high Hb values but will do so by predicting a patient's Hb level into the future and then using these predictions to determine doses to reduce Hb variability and to reduce the amount of Aranesp used.
PROCEDUREStandard of care
Current standard of care guidelines are followed for erythropoiesis-stimulating agents to control anemia in dialysis patients
Sponsors
Intermountain Health Care, Inc.
Study design
Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
SUPPORTIVE_CARE
Masking
NONE
Intervention model description
All patients placed on dialysis receive standard of care for a minimum of 150 days; after qualifying for the study, they enter the experimental intervention arm.
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Males and females (≥ 18 years of age) with End Stage Kidney Disease undergoing in-center hemodialysis * 150 days of hemoglobin readings and Aranesp doses without a hospitalization relevant to the condition of anemia
Exclusion criteria
* Inflammation as characterized by ferritin levels greater than 1000 ng/mL * Patients with active cancer * Patients with PTH greater than 1,000 pg/mL * Active GI Bleed * Hospitalization relevant to ESRD in last 150 days or during study * Patients receiving Procrit rather than Aranesp.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Reduction of hemoglobin cycling in dialysis patients | 90 days after the intervention | Reduction of hemoglobin cycling |
| Time hemoglobin levels are maintained within acceptable range | 90 days after the intervention | Time hemoglobin levels are maintained within acceptable range |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Reduction in quantity of drug administered to patients | 90 days after the intervention | Reduction in quantity of drug administered to patients |
Countries
United States
Outcome results
None listed