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[Isotopic renal study in diabetic nephropathy]
A Benítez Segura1, J Martín-Comín, Y Ricart
1Ciutat Sanitària i Universitària de Bellvitge, L'Hospitalet, Barcelona, Spain.
Revista Espanola De Medicina Nuclear
|February 1, 2002
Summary
Effective renal plasma flow (ERPF) and kidney split function (KSF) predict diabetic nephropathy progression earlier than serum creatinine. Radionuclide tests offer superior detection of renal abnormalities compared to ultrasound.
Area of Science:
- Nephrology
- Nuclear Medicine
- Diabetology
Background:
- Diabetic nephropathy is a major complication of diabetes mellitus.
- Early detection of renal function decline is crucial for managing diabetic nephropathy.
- Traditional markers like serum creatinine may not reflect early functional changes.
Purpose of the Study:
- To assess the prognostic value of kidney split function (KSF), effective renal plasma flow (ERPF), and glomerular filtration rate (GF) in diabetic nephropathy.
- To compare the predictive capabilities of radionuclide imaging with ultrasound for renal abnormalities.
Main Methods:
- 125 diabetic patients (IDDM/NIDDM) underwent evaluation of GF, ERPF, KSF, and serum creatinine at baseline.
- Patients were followed for 5 years with serum creatinine monitoring.
- Ultrasound and/or digital angiography were performed in 120 patients.
Main Results:
- Decreased ERPF (n=76) was associated with progressive serum creatinine increase over 5 years.
- Patients with normal ERPF showed no significant change in serum creatinine.
- Asymmetric KSF (<40% in one kidney) was found in 42 patients, with 32 having decreased ERPF; ultrasound revealed pathology in only 6 of these.
Conclusions:
- ERPF alterations precede serum creatinine changes in diabetic nephropathy.
- ERPF, KSF, and GF calculations have higher prognostic value than ultrasound for diabetic nephropathy management.
- Radionuclide tests are more accurate than ultrasonography for detecting renal function abnormalities in diabetic patients.