Diuresis renography in equivocal urinary tract obstruction. A historical perspective
Biomedicine & Pharmacotherapy, ISSN: 0753-3322, Vol: 116, Page: 108981
2019
- 11Citations
- 33Captures
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Review Description
Obstructive nephropathy may be suspected for the incidental detection of dilated renal collecting system at ultrasonography, CT or MRI. A dilated renal collecting dilation (calyco-pelvis or ureteres) might be related 1) to an anatomical variant of the excretory tract without obstruction and, therefore, without consequence on renal function, or 2) to an obstruction/stenosis of the urinary tract that may cause a damage of kidney function. In the present review we annotated the various methods proposed for Diuresis Renography ( DR ) used with the purpose to make early diagnosis of obstructive nephropathy. First, the F + 20 method (i.e. furosemide 40 mg injected IV 20 min after radiotracer injection) in seated position (sp) ( F + 20(sp) ) was reported to distinguish between an anatomical dilation from an anatomical obstruction of the urinary tract. It was also suggested to perform DR with the patient in supine or prone position in order to minimize possible furosemide-induced hypotension and patient’s movements during exam. Other DR methods were proposed administering furosemide EV to the patient in supine position at different times: F-15 (furosemide injected IV 15 min prior to radiotracer), F0 (furosemide injected contemporary to radiotracer), F + 20 (furosemide injected 20 min after the radiotracer), F-20 and Well Tempered (other than F + 20 this modality requires saline infusion for all duration of the test plus bladder catheterization). Unfortunately, in all the above described DR methods with patientin supine position, despite the furosemide administration, a sensitive slowing down of urinary outflow could be related to the supine position itself of the patient during the examination. Lastly, there are reports of a new DR method based on furosemide IV injection 10 min after radiotracer with the patient in seated position, F+10(sp). This method allows a better timing between hydration (400 mL of water) at 5 min, and the injection of relatively low dose of furosemide (20 mg), thus avoiding side effects as diuretic-induced hypotension and favouring bladder filling, therefore ameliorating patient compliance and reducing equivocal responses.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0753332219317007; http://dx.doi.org/10.1016/j.biopha.2019.108981; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85066131702&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/31136948; https://linkinghub.elsevier.com/retrieve/pii/S0753332219317007; https://dx.doi.org/10.1016/j.biopha.2019.108981
Elsevier BV
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