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Inicio Revista Española de Medicina Nuclear e Imagen Molecular (English Edition) Monitoring of renal function using 99mTc-DMSA and 99mTc-DTPA scintigraphy in pat...
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Vol. 31. Issue 6.
Pages 322-327 (November - December 2012)
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Vol. 31. Issue 6.
Pages 322-327 (November - December 2012)
Original article
Monitoring of renal function using 99mTc-DMSA and 99mTc-DTPA scintigraphy in patients with spinal cord injury
Monitorización de la función renal mediante gammagrafía 99mTc-DMSA y 99mTc-DTPA en pacientes con lesión de la médula espinal
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H. Tunaa, T.F. Çermikb,c,
Corresponding author
tfcermik@yahoo.com

Corresponding author.
, F. Tunad
a Department of Physician Medicine and Rehabilitation, Hospital of the University of Trakya, Edirne, Turkey
b Department of Nuclear Medicine, Hospital of the University of Trakya, Edirne, Turkey
c Clinic of Nuclear Medicine, Istanbul Training and Research Hospital, Istanbul, Turkey
d Edirne State Hospital, Edirne, Turkey
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Figures (2)
Tables (4)
Table 1. ASIA scores of patients with demographical data and clinical findings.
Table 2. Sonographical findings of tertraplegic (T) and paraplegic (P) patients.
Table 3. Tc-99m DMSA scintigraphy findings of tetraplegic (T) and paraplegic (P) patients.
Table 4. Tc-99m DTPA scintigraphy findings of patients.
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Abstract
Aim

The aim of this study was to assess the degree of alterations of renal function by using 99m-technetium dimercaptosuccinic acid (99mTc-DMSA) and 99m-technetium diethylenetriaminepentaacetic acid (99mTc-DTPA) scintigraphy in spinal cord injury (SCI) patients.

Material and methods

Twenty-two consecutive SCI (15 paraplegic and 7 tetraplegic) patients (mean age: 49.1±13.4 years) who had no urinary symptoms participated in this prospective study. The mean duration of injury was 45.6±48.8 months before. Sixteen patients had at least one urinary tract infection history. Renal cortical scintigraphy with 99mTc-DMSA, radionuclide renography with 99mTc-DTPA and renal ultrasound were performed within 2-week period.

Results

Four (18%) patients had serious pathology on their kidneys such as unilateral or bilateral parenchymal scarring and increased background uptake in their renal cortical scintigraphy with 99mTc-DMSA. Two of them had grade 3–4 pelvicaliceal ectasia on ultrasound. Additionally, 2 of 18 remaining patients had grade 2 pelvicaliceal ectasia on ultrasound. Sixteen (73%) patients had markedly delayed or delayed and decreased functions of one or both of kidneys on radionuclide renography. However, only four patients had grade 2–4 pelvicaliceal ectasia and none of them had a finding of loosening of renal parenchyma.

Conclusion

Combined use of renal cortical scintigraphy and radionuclide renography appears to be contributive to renal ultrasound in the long-term follow-up of patients with SCI. Patients with abnormal findings should be closely followed, and early therapeutic interventions may enable lower morbidity and mortality rates in these patients.

Keywords:
Spinal cord injury
Kidney
Scintigraphy
99mTc-DMSA
99mTc-DTPA
Resumen
Objetivo

El objetivo de este estudio fue evaluar el grado de alteración funcional renal mediante el estudio gammagráfico con 99mTc-ácido demercaptosuccínico (99mTc-DMSA) y 99mTc-ácido dietilentriaminopentaacético (99mTc-DTPA) en pacientes con lesión de médula espinal (SCI).

Material y métodos

Estudio prospectivo que incluye a 22 pacientes consecutivos con SCI (15 parapléjicos y 7 tetrapléjicos) (media de edad: 49,1±13,4 años) sin síntomas urinarios. La lesión medular se había producido hacía, 45,6±48,8 meses. Dieciséis pacientes tenían al menos historia de infección del tracto urinario. La gammagrafía renal con 99mTc-DMSA, el renograma con 99mTc-DTPA y la ecografía renal se realizaron en un periodo de 2 semanas.

Resultados

En la gammagrafía cortical con 99mTc-DMSA 4 pacientes (18%) presentaron alteraciones severas, unilaterales o bilaterales, en el parénquima renal y aumento de la captación de fondo. Dos de ellos tenían ectasia pielocalicial grado 3–4 en la ecografía. Además, 2 de los 18 pacientes restantes tenían ectasia pielocalicial grado 2 en la ecografía. En el renograma con 99mTc-DTPA 16 pacientes (73%) presentaron retraso, o retraso y disminución de la función, en uno o en los 2 riñones. Sin embargo, solo 4 pacientes tenían ectasia pélvica grado 2 a 4 y ninguno de ellos, cicatrices corticales.

Conclusión

El uso combinado de la gammagrafía cortical renal y el renograma con radiotrazadores puede contribuir, junto con la ecografía, en el seguimiento a largo plazo de pacientes con SCI. Los casos con alteraciones en la gammagrafía o en el renograma deben tener un seguimiento más estrecho; de este modo, un tratamiento adecuado precoz puede reducir la morbilidad y la mortalidad en este tipo de pacientes.

Palabras clave:
Lesión de la médula espinal
Riñón
Gammagrafía
99mTc-DMSA
99mTc-DTPA

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