Kidney CalculiNCT03503539
Are the Stone Density and Location Useful Parameters for Small Kidney Stones?
A study testing Mini percutaneous nephrolithotomy and Retrograde intrarenal surgery in people with Kidney Calculi and Kidney Stone, run by Abant Izzet Baysal University.
Trial summary
The investigators aimed to evaluate whether these parameters could be guides for us in the selection of RIRS or Mini-PNL procedures in kidney stones that are smaller than 2 cm. The patients that have kidney stones smaller than two cm and be planned to undergo surgery were randomized into 2 groups prospectively. Read more about this study
- Who is it for?
- Any age
- Conditions the study is for
- Kidney Calculi, Kidney Stone
- What is being tested?
- Mini percutaneous nephrolithotomy and Retrograde intrarenal surgery
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 60 participants
- Where
- No sites listed yet
- Study dates
- Apr 2016to Jun 2017
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Who may be able to join
- Patients were evaluated with non-contrast abdominopelvic CT after a detailed anamnesis and physical examination.
- Patients, who had a kidney stone with a maximum diameter of less than 2 cm and who did not prefer to undergo ESWL, were taken into the study.
Who cannot join
- Patients with anomalous kidneys, skeletal deformities, severe obesity (BMI> 35) and those underwent ESWL treatment previously for the same stone were excluded from the study.
About this study
Official title: Are the Stone Density and Location Useful Parameters That Can Determine the Endourological Surgical Technique for Kidney Stones That Are Smaller Than 2 cm? Prospective Randomized Controlled Trial
The investigators aimed to evaluate whether these parameters could be guides for us in the selection of RIRS or Mini-PNL procedures in kidney stones that are smaller than 2 cm.
The patients that have kidney stones smaller than two cm and be planned to undergo surgery were randomized into 2 groups prospectively. RIRS was performed in the RIRS group using a 7.5-F fiberoptic flexible ureterorenoscope while Mini-PCNL group was dilated up to 16.5F and mini-PCNL was performed with 12F nephroscopy. Preoperative characteristics, operative and postoperative results were compared in two groups. Thereafter, intra and intergroup comparisons were made to determine the effects of HU value, indicating the stone density, higher or less than 677 and the stone location on stone-free rates.
- Conditions
- Kidney Calculi, Kidney Stone
- Being tested
- Mini percutaneous nephrolithotomy, Retrograde intrarenal surgery
- Medical subject headings
- Kidney Calculi
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Mini percutaneous nephrolithotomyProcedure or surgery
Retrograde intrarenal surgeryProcedure or surgery
| Study group | Role | What they receive |
|---|---|---|
| Mini percutaneous nephrolithotomy | Experimental | All operations were performed or supervised by the same surgeon. Right after the patients in mini-PNL group were placed a 5F ureteral catheter with general anesthesia, they were had a prone position and the access was performed by choosing the optimal calyx to reach the stone following the contrast agent was given. The guide wire was then placed and the stones were broken with a laser lithotripter using a 12F nephroscope (Modular minimally invasive PCNL system, Karl Storz, Tuttlingen, Germany) following the dilatation using an one step dilator with a 16.5F access sheath. When necessary, stones were removed using the stone removal forceps. Right after a 14-Fr nephrostomy tube was inserted and an antegrade pyelography was taken, the operation was terminated. Receives: Procedure: Mini percutaneous nephrolithotomy |
| Retrograde intrarenal surgery | Active comparator | Following the general anesthesia performed, a safety guide wire was placed and semirigid ureteroscopy (9.5 / 11.5F) was performed. Stones were fragmented using a 270 micron meter laser fiber with the help of 7.5-F fiber optic flexible ureterorenoscope after the placement of ureteral access sheat (9.5 / 11.5 F). Stone fragmentation was accomplished using a laser energy of 0.5-1.5 J and a rate of 5-15 Hz and adjusting this range according to stone hardness. 4.7F JJ stent was routinely placed at the end of the operation because of worries about possible edema etc. due to access sheath. In this group, access sheath could not be placed in 2 patients due to the small diameter of the ureter, and JJ stent was placed, and 2 weeks later, the procedure was performed as it was in the others. Receives: Procedure: Retrograde intrarenal surgery |
What is being measured
The primary outcome is the main question the study is designed to answer.
Stone free rate
Stone-free conditions were determined by low-dose spiral CT taken in postoperative third month
Measured: 1 year
Secondary outcomes (1)
Mean fluoroscopy time
İntraoperative duration of flouroscopy time
Measured: İntraoperative duration of flouroscopy
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted20 Apr 2018
- Study startApr 2016
- Primary completionMay 2017
- Study completionJun 2017
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (6)Papers the sponsor has linked to this study.
- Other trials for Kidney CalculiStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 60 participants (actual)
Sponsor and investigators
- Lead sponsor
- Abant Izzet Baysal University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Adnan Gucuk, Abant Izzet Baysal University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03503539
- Sponsor's protocol ID
- AbantIBU-AG001
- Status last verified
- Apr 2018
- First submitted
- 28 Mar 2018
- Last updated
- 20 Apr 2018
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Demirbas A, Resorlu B, Sunay MM, Karakan T, Karagoz MA, Doluoglu OG. Which Should be Preferred for Moderate-Size Kidney Stones? Ultramini Percutaneous Nephrolithotomy or Retrograde Intrarenal Surgery? J Endourol. 2016 Dec;30(12):1285-1289. doi: 10.1089/end.2016.0370.
PubMed 27706948Jacquemet B, Martin L, Pastori J, Bailly V, Guichard G, Bernardini S, Chabannes E, Bittard H, Kleinclauss F. Comparison of the efficacy and morbidity of flexible ureterorenoscopy for lower pole stones compared with other renal locations. J Endourol. 2014 Oct;28(10):1183-7. doi: 10.1089/end.2014.0286. Epub 2014 Sep 12.
PubMed 24811281Resorlu B, Unsal A, Gulec H, Oztuna D. A new scoring system for predicting stone-free rate after retrograde intrarenal surgery: the "resorlu-unsal stone score". Urology. 2012 Sep;80(3):512-8. doi: 10.1016/j.urology.2012.02.072. Epub 2012 Jul 26.
PubMed 22840867Resorlu B, Oguz U, Resorlu EB, Oztuna D, Unsal A. The impact of pelvicaliceal anatomy on the success of retrograde intrarenal surgery in patients with lower pole renal stones. Urology. 2012 Jan;79(1):61-6. doi: 10.1016/j.urology.2011.06.031.
PubMed 21855968Turk C, Petrik A, Sarica K, Seitz C, Skolarikos A, Straub M, Knoll T. EAU Guidelines on Diagnosis and Conservative Management of Urolithiasis. Eur Urol. 2016 Mar;69(3):468-74. doi: 10.1016/j.eururo.2015.07.040. Epub 2015 Aug 28.
PubMed 26318710Gucuk A, Uyeturk U, Ozturk U, Kemahli E, Yildiz M, Metin A. Does the Hounsfield unit value determined by computed tomography predict the outcome of percutaneous nephrolithotomy? J Endourol. 2012 Jul;26(7):792-6. doi: 10.1089/end.2011.0518. Epub 2012 Feb 10.
PubMed 22201298
Study at a glance
From the registry record, last updated by the sponsor on 20 Apr 2018. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Are the Stone Density and Location Useful Parameters That Can Determine the Endourological Surgical Technique for Kidney Stones That Are Smaller Than 2 cm? Prospective Randomized Controlled Trial
- ClinicalTrials.gov ID
- NCT03503539
- Acronym / sponsor ID
- AbantIBU-AG001
- Conditions
- Kidney Calculi, Kidney Stone
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 60 participants (actual)
- Lead sponsor
- Abant Izzet Baysal UniversityUniversity, hospital or other
- Study start
- Apr 2016 (actual)
- Primary completion
- May 2017 (actual)
- Study completion
- Jun 2017 (actual)
- First posted
- 20 Apr 2018 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The investigators aimed to evaluate whether these parameters could be guides for us in the selection of RIRS or Mini-PNL procedures in kidney stones that are smaller than 2 cm.
The patients that have kidney stones smaller than two cm and be planned to undergo surgery were randomized into 2 groups prospectively. RIRS was performed in the RIRS group using a 7.5-F fiberoptic flexible ureterorenoscope while Mini-PCNL group was dilated up to 16.5F and mini-PCNL was performed with 12F nephroscopy. Preoperative characteristics, operative and postoperative results were compared in two groups. Thereafter, intra and intergroup comparisons were made to determine the effects of HU value, indicating the stone density, higher or less than 677 and the stone location on stone-free rates.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Mini percutaneous nephrolithotomy | Experimental | Procedure: Mini percutaneous nephrolithotomyAll operations were performed or supervised by the same surgeon. Right after the patients in mini-PNL group were placed a 5F ureteral catheter with general anesthesia, they were had a prone position and the access was performed by choosing the optimal calyx to reach the stone following the contrast agent was given. The guide wire was then placed and the stones were broken with a laser lithotripter using a 12F nephroscope (Modular minimally invasive PCNL system, Karl Storz, Tuttlingen, Germany) following the dilatation using an one step dilator with a 16.5F access sheath. When necessary, stones were removed using the stone removal forceps. Right after a 14-Fr nephrostomy tube was inserted and an antegrade pyelography was taken, the operation was terminated. |
| Retrograde intrarenal surgery | Active comparator | Procedure: Retrograde intrarenal surgeryFollowing the general anesthesia performed, a safety guide wire was placed and semirigid ureteroscopy (9.5 / 11.5F) was performed. Stones were fragmented using a 270 micron meter laser fiber with the help of 7.5-F fiber optic flexible ureterorenoscope after the placement of ureteral access sheat (9.5 / 11.5 F). Stone fragmentation was accomplished using a laser energy of 0.5-1.5 J and a rate of 5-15 Hz and adjusting this range according to stone hardness. 4.7F JJ stent was routinely placed at the end of the operation because of worries about possible edema etc. due to access sheath. In this group, access sheath could not be placed in 2 patients due to the small diameter of the ureter, and JJ stent was placed, and 2 weeks later, the procedure was performed as it was in the others. |
Who may qualify
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (2 listed)
- Patients were evaluated with non-contrast abdominopelvic CT after a detailed anamnesis and physical examination.
- Patients, who had a kidney stone with a maximum diameter of less than 2 cm and who did not prefer to undergo ESWL, were taken into the study.
Key exclusion criteria (1 listed)
- Patients with anomalous kidneys, skeletal deformities, severe obesity (BMI> 35) and those underwent ESWL treatment previously for the same stone were excluded from the study.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Mini percutaneous nephrolithotomy | Procedure or surgery | Mini percutaneous nephrolithotomy |
| Retrograde intrarenal surgery | Procedure or surgery | Retrograde intrarenal surgery |
Primary outcome
Stone free rate
Time frame: 1 year
Stone-free conditions were determined by low-dose spiral CT taken in postoperative third month
1 secondary outcome
Mean fluoroscopy time
Time frame: İntraoperative duration of flouroscopy
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 20 Apr 2018.
- Results publication: PubMed 27706948Demirbas A, Resorlu B, Sunay MM, Karakan T, Karagoz MA, Doluoglu OG. Which Should be Preferred for Moderate-Size Kidney Stones? Ultramini Percutaneous Nephrolithotomy or Retrograde Intrarenal Surgery? J Endourol. 2016 Dec;30(12):1285-1289. doi: 10.1089/end.2016.0370.
- Results publication: PubMed 24811281Jacquemet B, Martin L, Pastori J, Bailly V, Guichard G, Bernardini S, Chabannes E, Bittard H, Kleinclauss F. Comparison of the efficacy and morbidity of flexible ureterorenoscopy for lower pole stones compared with other renal locations. J Endourol. 2014 Oct;28(10):1183-7. doi: 10.1089/end.2014.0286. Epub 2014 Sep 12.
- Results publication: PubMed 22840867Resorlu B, Unsal A, Gulec H, Oztuna D. A new scoring system for predicting stone-free rate after retrograde intrarenal surgery: the "resorlu-unsal stone score". Urology. 2012 Sep;80(3):512-8. doi: 10.1016/j.urology.2012.02.072. Epub 2012 Jul 26.
- Results publication: PubMed 21855968Resorlu B, Oguz U, Resorlu EB, Oztuna D, Unsal A. The impact of pelvicaliceal anatomy on the success of retrograde intrarenal surgery in patients with lower pole renal stones. Urology. 2012 Jan;79(1):61-6. doi: 10.1016/j.urology.2011.06.031.
- Results publication: PubMed 26318710Turk C, Petrik A, Sarica K, Seitz C, Skolarikos A, Straub M, Knoll T. EAU Guidelines on Diagnosis and Conservative Management of Urolithiasis. Eur Urol. 2016 Mar;69(3):468-74. doi: 10.1016/j.eururo.2015.07.040. Epub 2015 Aug 28.
- Results publication: PubMed 22201298Gucuk A, Uyeturk U, Ozturk U, Kemahli E, Yildiz M, Metin A. Does the Hounsfield unit value determined by computed tomography predict the outcome of percutaneous nephrolithotomy? J Endourol. 2012 Jul;26(7):792-6. doi: 10.1089/end.2011.0518. Epub 2012 Feb 10.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
Questions about this trial
What is this clinical trial studying?
A study testing Mini percutaneous nephrolithotomy and Retrograde intrarenal surgery in people with Kidney Calculi and Kidney Stone, run by Abant Izzet Baysal University.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 20 Apr 2018. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Stone free rate (time frame: 1 year). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT03503539, which also lists 6 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Apr 2018; AzTrials last refreshed its copy on 26 Oct 2026.