Acute Kidney Injury, Chronic Kidney Disease, Hypertension
Conditions
Keywords
acute kidney injury
Brief summary
Sepsis is the most common cause of childhood death worldwide. Millions of children survive, but are left with impaired health. Sepsis-related Acute Kidney Injury (sAKI) is increasingly recognized as a significant factor associated with long-term mortality among different patient populations. Renal dysfunction and subsequent chronic kidney disease is implicated in the development of hypertension and cardiovascular disease. The investigators overall hypothesis is that, in the pediatric population, sepsis-related AKI will have unrecognized, long-term consequences with regard to kidney function, endothelial function, blood pressure control, and overall health.
Detailed description
This will be a two-arm cross-sectional control-cohort outpatient evaluation. Subjects with sAKI and a random selection of non-sAKI subjects who agree to participate in another study of quality of life survey will be asked to participate in the outpatient study. Subjects will be asked to come in to the Clinical Research Center for 24-hour monitoring and participate in the outpatient study where urinary and serum studies to measure glomerular filtration rate, renal plasma flow followed by blood pressure monitoring, peripheral arterial and applanation tonometry.
Interventions
DRUGIodohippurate
An injection of non-radioactive iodohippurate (0.07 mL/kg) will be administered to determine renal plasma flow (RPF)
PROCEDURE24 hour ambulatory Blood Pressure
Ambulatory blood pressure (BP) monitoring will be performed using a commercially available device (TIBA Ambulo 2400) for 24 hours with measurements every 30 minutes while awake and every hour during sleep.
PROCEDUREPeripheral Arterial Tonometry
The peripheral arterial tonometry (PAT) device measures changes in the cutaneous circulation that correlate with flow-mediated dilatation.
PROCEDUREPulse Wave Velocity
Carotid-femoral and carotid-radial pulse wave velocities (PWV), validated markers of individual cardiovascular risk, will be determined by applanation tonometry using SphygmoCorVx technology (AtCor Medical). PWV is an index of the overall stiffness of a vascular segment between measurement sites 59. Thus, while carotid-femoral PWV is an index of the overall stiffness of proximal (central) arteries, the overall stiffness of peripheral arteries contributes relatively more to carotid-radial PWV.
DRUGGadolinium
Magnevist Gadolinium (GD)-diethylene-triamine-pentaacetic acid-bis-oleate (0.07 to 0.14 mL/kg) will be used to determine GFR.
Sponsors
American Society of Nephrology
University of Florida
Study design
Observational model
CASE_CONTROL
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
ALL
Age
18 Years to 24 Years
Healthy volunteers
Yes
Inclusion criteria
For all patients: • Age 18-24 at time of participation in the study For non-AKI sepsis patients: * Hospitalization with a diagnosis of sepsis from 1998-2014 * Failure to meet pEDRIFLE criteria for AKI during incident sepsis admission * Participation in cognitive survey study with completion of the PedsQL survey For sAKI patients: * Hospitalization with a diagnosis of sepsis from 1998-2014 * Severe AKI as defined by the pEDRIFLE criteria during incident sepsis admission * Participation in cognitive survey study with completion of the PedsQL survey
Exclusion criteria
For all patients: * Known pre-existing CKD as defined by history of kidney transplant or long-term dialysis * Age greater than 18 years at the time of incident sepsis admission * AKI from primary kidney disease including acute glomerulonephritis and obstructive uropathy * Pregnancy at the time of enrollment * Known or suspected allergy to gadolinium based contrast * Known or suspected allergy to iodine or shellfish will be excluded from RPF measurement with iodohippurate * Heart failure or condition whereby the administration of 0.9% normal saline would be contraindicated
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Microalbuminuria will be measured in the urine | Day 2 | The level of albumin protein produced by microalbuminuria can be detected by special albumin-specific urine dipsticks. A microalbumin urine test determines the presence of the albumin in urine. In a properly functioning body, albumin is not normally present in urine because it is retained in the bloodstream by the kidneys. |
| Renal plasma flow (RPF) filtration | Day 2 | An injection of non-radioactive iodohippurate (0.07 mL/kg) will be administered to determine renal plasma flow (RPF) filtration. |
| Proteinuria will be measured in the urine | Day 2 | Proteinuria may be a sign of renal (kidney) damage. Since serum proteins are readily reabsorbed from urine, the presence of excess protein indicates either an insufficiency of absorption or impaired filtration. People with diabetes may have damaged nephrons and develop proteinuria. |
| Cystatin C will be measured in the blood | Day 2 | Cystatin C can be measured in a random sample of serum (the fluid in blood from which the red blood cells and clotting factors have been removed) using immunoassays such as nephelometry or particle-enhanced turbidimetry. |
| Glomerular Function Rate (GFR) filtration | Day 2 | Magnevist Gadolinium (GD)-diethylene-triamine-pentaacetic acid-bis-oleate (0.07 to 0.14 mL/kg) will be used to determine GFR. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Peripheral Arterial Tonometry | 24 hours | The peripheral arterial tonometry (PAT) device measures changes in the cutaneous circulation that correlate with flow-mediated dilatation. |
| Pulse Wave Velocity | 24 hours | Carotid-femoral and carotid-radial pulse wave velocities (PWV), validated markers of individual cardiovascular risk, will be determined by applanation tonometry using SphygmoCorVx technology (AtCor Medical). PWV is an index of the overall stiffness of a vascular segment between measurement sites 59. Thus, while carotid-femoral PWV is an index of the overall stiffness of proximal (central) arteries, the overall stiffness of peripheral arteries contributes relatively more to carotid-radial PWV. |
| 24 hour ambulatory Blood Pressure | 24 hours | Ambulatory blood pressure (BP) monitoring will be performed using a commercially available device (TIBA Ambulo 2400) for 24 hours with measurements every 30 minutes while awake and every hour during sleep. |
Outcome results
None listed