Clinical trial NCT03936673: Effect of Nephrostomy on Relative Function of Obstructed Kidney
Official title: The Effect of Percutaneous Nephrostomy Application on Obstructed Kidneys With Relative Function of 10% or Less In Technetium-99m Dimercaptosuccinic Acid (DMSA) Scintigraphy
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Obstructive Uropathy
Keywords: obstructive uropathy
relative renal function
DMSA
Lead sponsor: TC Erciyes University
Sponsor class: OTHER
First posted: 2019-05-03
Enrollment: 18
Sex: ALL
Minimum age (years): 18
Maximum age (years): 75
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Intervention model description: Patients diagnosed with unilateral obstructed kidney with RRF 10% or less underwent application of percutaneous nephrostomy tube on affected side.
Primary purpose: TREATMENT

Brief summary: Urinary tract obstruction is a serious health problem due to kidney damage. Relative renal function has an important role in the treatment of obstructed kidneys. Nephrectomy can be recommended when the relative renal function is 10% or less in radionuclide examinations. Recently, however, nephron sparing approaches have come to the fore. This indicated the need to evaluate the possibility of recovering the function of the kidney before nephrectomy. The aim of this study is to compare relative functions of obstructed kidneys in technetium 99m dimercaptosuccinic acid scintigraphy (DMSA) before and 2 weeks after nephrostomy tube.

Detailed description: Obstructive uropathy is one of the most important causes of acute renal injury and end-stage renal failure. obstruction of urine flow increases the intratubular pressure. This pressure increase causes decrease in renal blood flow and starts the inflammatory process. In the first few hours after total ureter obstruction, due to the increase in intratubular pressure glomerular filtration ceases and tubular transport is markedly decreased. Long lasting obstruction results in renal fibrosis and end stage renal damage. Basically obstructive uropathy leading to irreversible renal damage and loss of renal function is the main indication for simple nephrectomy. Serious renal parenchymal damage is defined as non-functioning kidney having relative renal function (RRF) 10% or less in the literature. But recently in some studies it was suggested that by applying the nephrostomy catheter, ability of kidney to regain function can be evaluated before nephrectomy. So, possibility of gaining function should be kept in mind. In this study effect of percutaneous nephrostomy tube on serum creatinine, blood urea nitrogen (BUN) and RRF in obstructed kidney with RRF 10% or less. Before and 2 weeks after percutaneous nephrostomy, serum creatinine, ure and RRF in DMSA was recorded and compared.

Eligibility criteria: Inclusion Criteria:

* Unilateral obstructed kidney with RRF 10% or less
* Unilateral obstructed kidney with grade 2 or more hydroureteronephrosis
* Defined etiology for unilateral obstructed kidney
* estimated glomerular filtration rate (GFR) ≥ 30ml/min
* Approving the nephrostomy procedure

Exclusion Criteria:

* Unilateral obstructed kidney with RRF above 10%
* Estimated GFR \<30 ml/min
* diagnosis of bilateral obstructed kidneys
* not approving nephrostomy

Primary outcomes:
measure: serum creatinine level 2 weeks after nephrostomy
timeFrame: 2 weeks after nephrostomy
measure: Serum BUN level 2 weeks after nephrostomy
timeFrame: 2 weeks after nephrostomy
measure: RRF in DMSA 2 weeks after nephrostomy
timeFrame: 2 weeks after nephrostomy
Secondary outcomes:
Other outcomes:
Locations:
city: Kayseri
country: Turkey
facility: Department of Urology, Ercieys University, Faculty Of Medicine,
Study officials:
affiliation: Erciyes University Faculty of Medicine
name: Abdullah T Demirtas, Assoc Prof
role: PRINCIPAL_INVESTIGATOR
References:
citation: Thorup J, Jokela R, Cortes D, Nielsen OH. The results of 15 years of consistent strategy in treating antenatally suspected pelvi-ureteric junction obstruction. BJU Int. 2003 Jun;91(9):850-2. doi: 10.1046/j.1464-410x.2003.04228.x.
citation: Gupta DK, Chandrasekharam VV, Srinivas M, Bajpai M. Percutaneous nephrostomy in children with ureteropelvic junction obstruction and poor renal function. Urology. 2001 Mar;57(3):547-50. doi: 10.1016/s0090-4295(00)01046-3.
citation: Ismail A, Elkholy A, Zaghmout O, Alkadhi A, Elnaggar O, Khairat A, Elhassanat H, Mosleh A, Hamad B, Elzomer J, Elkaabi A. Postnatal management of antenatally diagnosed ureteropelvic junction obstruction. J Pediatr Urol. 2006 Jun;2(3):163-8. doi: 10.1016/j.jpurol.2005.07.005. Epub 2005 Aug 26.
citation: Morduchowicz G, Winkler J, Zabludowski JR, Boner G. Effects of residual renal function in haemodialysis patients. Int Urol Nephrol. 1994;26(1):125-31. doi: 10.1007/BF02768252.
citation: Wang AY, Wang M, Woo J, Law MC, Chow KM, Li PK, Lui SF, Sanderson JE. A novel association between residual renal function and left ventricular hypertrophy in peritoneal dialysis patients. Kidney Int. 2002 Aug;62(2):639-47. doi: 10.1046/j.1523-1755.2002.00471.x.
citation: Bargman JM, Thorpe KE, Churchill DN. Relative contribution of residual renal function and peritoneal clearance to adequacy of dialysis: a reanalysis of the CANUSA study. J Am Soc Nephrol. 2001 Oct;12(10):2158-2162. doi: 10.1681/ASN.V12102158.
citation: Zhang S, Zhang Q, Ji C, Zhao X, Liu G, Zhang S, Li X, Lian H, Zhang G, Guo H. Improved split renal function after percutaneous nephrostomy in young adults with severe hydronephrosis due to ureteropelvic junction obstruction. J Urol. 2015 Jan;193(1):191-5. doi: 10.1016/j.juro.2014.07.005. Epub 2014 Jul 9.
citation: Aziz MA, Hossain AZ, Banu T, Karim MS, Islam N, Sultana H, Alam MI, Hanif A, Khan AR. In hydronephrosis less than 10 % kidney function is not an indication for nephrectomy in children. Eur J Pediatr Surg. 2002 Oct;12(5):304-7. doi: 10.1055/s-2002-35956.