Abstract | OBJECTIVES: METHODS: We prospectively studied 36 patients (58 ureteral renal units), 30 girls and 6 boys with a median age of 6 years (range 2 months to 18 years). All patients had primary VUR and were treated with a single subureteral collagen injection (GAX 35). The patients were followed up by voiding cystography. RESULTS: According to the International Reflux Study Classification, we found the following reflux grades preoperatively: grade I, 2 ureteral units; grade II, 21 units; grade III, 28 units; grade IV, 4 units, and grade V, 3 units. All patients were treated with subureteral bovine collagen injection (GAX 35, mean volume 1.7 mL, range 0.7 to 3.5). All but 3 cases of reflux resolved initially. The mean follow-up was 13 months (range 1 to 108). After 37 months of follow-up, only 5 (9%) of 57 treated units remained reflux free. One unit was followed up for 17 months and also remained reflux free. CONCLUSIONS: These data suggest that a single endoscopic subureteral collagen injection is not effective in the long-term follow-up of patients with primary VUR. In the future, it will be important to determine whether the new, currently used, and soon be approved bulking agents show better long-term clinical results to prevent VUR recurrence than bovine collagen does.
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Authors | A Haferkamp, H Contractor, K Möhring, G Staehler, J Dörsam |
Journal | Urology
(Urology)
Vol. 55
Issue 5
Pg. 759-63
(May 2000)
ISSN: 0090-4295 [Print] United States |
PMID | 10792096
(Publication Type: Clinical Trial, Journal Article)
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Chemical References |
- Biocompatible Materials
- glutaraldehyde-cross-linked collagen
- Collagen
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Topics |
- Adolescent
- Animals
- Biocompatible Materials
(administration & dosage)
- Cattle
- Child
- Child, Preschool
- Collagen
(administration & dosage)
- Female
- Follow-Up Studies
- Humans
- Infant
- Injections, Intralesional
- Male
- Prospective Studies
- Time Factors
- Treatment Failure
- Ureteroscopy
- Vesico-Ureteral Reflux
(therapy)
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