After some research, I have noticed that the appearance seemed close to that of phosphate crystals. This seems to be related to struvite stone formation. When looking up information regarding crystal formation, Septra showed up on my list of articles to read about. I am sorry this is lengthy. I want to provide you with enough information so that you can better answer the questions.
Many types of crystals are harmless and can be seen in the normal patient.
The identification of cystine crystals would establish a diagnosis of cystinuria, a hereditary stone forming disease. Although your child s specific gravity indicates they are well hydrated, to help prevent stones, I would encourage your child to drink water as well as eating a normal diet. And finally, Septra is a quality antibiotic used for many years, to my knowledge, it has never been associated with stone formation. Just a thought about your daughter s pain, I would need to see her films, but sometimes a partial UPJ obstruction can cause flank pain at times of high fluid diuresis. This would be evident during a nuclear renal scan showing an obstructed picture.