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[Renoscintigram in urinary stones]
Hinyokika Kiyo. Acta Urologica Japonica
|May 1, 1984
Summary
Urinary stasis, detected via 99m-Tc DTPA renoscintigraphy, is frequently observed on the side opposite to kidney stones. This suggests urinary stasis may contribute to stone formation and indicates a risk for future stone development.
Area of Science:
- Nephrology
- Nuclear Medicine
- Urology
Context:
- Urinary stones, or calculi, affect the upper urinary tract.
- Assessing contralateral kidney function is crucial for stone management.
- Traditional imaging may not reveal subtle functional changes.
Purpose:
- To investigate the presence of urinary stasis on the contralateral side of upper urinary tract stones.
- To correlate renoscintigraphic findings with stone formation.
- To evaluate the diagnostic utility of 99m-Tc DTPA renoscintigraphy in detecting contralateral stasis.
Summary:
- Seventy-six patients with unilateral upper urinary tract stones were retrospectively analyzed using 99m-Tc DTPA renoscintigraphy.
- Despite normal excretory urograms, 55 (72.4%) patients exhibited contralateral urinary stasis.
- Elongation of T1/2 (half-time) in the region of interest (ROI) curve was observed in 35 of these cases, indicating impaired drainage.
Impact:
- Findings suggest that contralateral urinary stasis may be a contributing factor in the pathogenesis of kidney stone formation.
- Highlights the potential of 99m-Tc DTPA renoscintigraphy in identifying occult contralateral stasis.
- Warns of the risk for future stone development in the contralateral, currently unaffected kidney.
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