A variety of non-invasive urodynamic and non-urodynamic techniques have been used to evaluate LUTS and some show great promise. However, there is as yet, insufficient evidence to justify replacement of invasive voiding cystometry by these investigational approaches.
Backgroundthis study represents a case series to evaluate how successful is the rigid percutaneous nephroscopy as a tool for clearance of all stones in various locations in horseshoe kidneys.MethodsBetween 2005 and 2009, we carried out PCNL (percutaneous nephrolithotomy) for calculi in horseshoe kidneys in 21 renal units (17 patients) in our department. The indications were large stone burden in 18 units and failed SWL(shock wave lithotripsy) in 3 renal units. All procedures were done under general anesthesia; using fluoroscopic guidance for localization and standard alkan dilatation followed by rigid nephroscopy and stone extraction with or without stone disintegration. We analyzed our results regarding the site and number of the required access, the intra and postoperative complications, the presence of any residual stones, as well as their location.ResultsThe procedure was completed, using a single access tract in 20 renal units, with the site of puncture being the upper calyx in nine units and the posterior middle calyx in eleven units. Only in one renal unit, two access tracts (an upper and a lower calyceal) were required for completion and a supracostal puncture was required in another case. There was no significant intraoperative bleeding and no blood transfusion was required in any patient. A pelvic perforation occurred in one case, requiring longer PCN (percutaneous nephrostomy) drainage. One patient with infection stones suffered urosepsis postoperatively which was successfully managed. Three cases had residual stones, all located in the renal isthmus, all residuals were un approachable with the rigid instrument; resulting in a overall stone-free rate of 85.7% at discharge.ConclusionPercutaneous nephrolithotomy is generally safe and successful in the management of stones in horseshoe kidneys. However, location of the stones in these patients is crucial to decide the proper tool for optimal stone clearance result.
In recent years, botulinum-A neurotoxin has increasingly been used to manage lower urinary tract symptoms, including overactive bladder and detrusor overactivity (DO), either due to neurogenic or idiopathic etiology. Techniques, doses, and preparation vary. Although many studies have reported promising results regarding efficacy, potential adverse effects, particularly urinary retention, have been less comprehensively reported. We performed a critical review of published studies evaluating botulinum treatment for overactive bladder and its reported effects on voiding function. Acute urinary retention is recognized, though rare. Chronic urinary retention is inconsistently reported; it appears to be more common in neurogenic DO, but it can occur in idiopathic DO. Increased postvoid residuals have been reported by several studies, but the clinical significance that investigators attach to the observation varies. The detrimental effect of retention on quality of life can be considerable. Accordingly, patients should be fully counseled on the risks of urinary retention and trained in intermittent catheterization before the procedure. Postvoid residual assessment should be part of follow-up and patients should be warned of possible presentations.
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