Prediction of calcium oxalate monohydrate stone composition during ureteroscopy
| Autor: | Joel M.H. Teichman, Reza Hamidizedah, Megan Melnyk |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
medicine.medical_specialty
medicine.diagnostic_test business.industry medicine.medical_treatment education Calcium oxalate Lithotripsy medicine.disease Laser lithotripsy chemistry.chemical_compound chemistry medicine Kidney stones Ureteroscopy Radiology Stone composition Pulse energy business CALCIUM OXALATE MONOHYDRATE |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.905675 |
| Popis: | Introduction: Prior research shows that Ho:YAG lithotripsy produces tiny dust fragments at low pulse energy (0.2J). However, calcium oxalate monohydrate (COM) stones may not fragment at this low pulse energy setting. Stone composition is rarely known until after surgery and historically, attempts to predict stone composition on the basis of endoscopic stone appearance were unsuccessful. Current endoscopic technology permits visual details that previously were not evident. As COM appears black under ambient light, we attempt to predict COM stone composition at the time of ureteroscopy based on its endoscopic appearance. Methods: Consecutive subjects undergoing ureteroscopy for stone disease were studied. Any portion of the stone that appeared black under endoscopic vision was considered clinical evidence of COM. Predicted stone composition was correlated with post-operative calculus analysis. Results: 46 consecutive ureteroscopic stone cases were analyzed prospectively. 25 of 28 subjects (89%) with black stones had stones later proven to be COM by composition analysis, versus one of 18 patients (6%) with non-black stones that were COM (p |
| Databáze: | OpenAIRE |
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