CClinicalTrials.gg
Status unknownNCT04317443Updated Apr 30, 2020

A Prospective Observational Comparison of SMP and ESWL for the Treatment of Renal Stones ≥20 mm in Children (IAU-04)

An observational study in Kidney Stone, sponsored by The International Alliance of Urolithiasis. Status unknown. Open to participants aged Up to 14 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2020-04-30.

Sponsored by The International Alliance of Urolithiasis · Observational

The sponsor has not verified this record recently (last verified Apr 2020), so the status shown — last known as Not yet recruiting — may be out of date.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
250
Ages
Up to 14 Years
Sex
All
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Study summary

ESWL and PNL are the two treatment modalities for kidney stones greater than 20 mm in the pediatric population. ESWL is non-invasive, does not require anesthesia and inexpensive, but its success rate may be lower, and require multiple treatment sessions. On the contrary, PNL has a higher success rate, does not require multiple sessions but is an invasive method. Compared to standard PNL, miniaturized PNL systems have been shown to decrease complications with comparable success rates. SMP is a unique miniaturized PNL system with integrated active irrigation and suction systems. The current literature lacks studies comparing SMP and ESWL prospectively in the pediatric population. In this study, the effectiveness, reliability, and reusability of ESWL and SMP will be compared.

Read the detailed description

To compare the success and complication rates of super-mini-percutaneous nephrolithotomy (SMP) and Extracorporeal Shock Wave Lithotripsy (ESWL) for the treatment of renal stones ≥20 mm in children.An international multicentre, prospective, observational study. Pediatric cases with renal Stones ≥20 mm who undergo ESWL or SMP will be evaluated and compared proespectively. The total number of departments planned to be included in the study is 10 and the number of cases is 180.

02

Conditions studied

  • Kidney Stone

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Keywords

  • percutaneous nephrolithotomy
  • pcnl
  • miniperc
  • smp
  • children
03

In context

Kidney Calculi

598 studies on the registry are indexed under Kidney Calculi; 163 are open to participants now.

This study's planned enrollment of 250 is above the median of 144 across 110 observational studies indexed under Kidney Calculi.

Browse Kidney Calculi studies →

Lead sponsor

This is the only study on the registry with The International Alliance of Urolithiasis as lead sponsor.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
Up to 14 Years
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Probability sample

Study population

Pediatric patients undergoing SWL and SMP

Inclusion criteria

  • Children ≤14 years old with renal Stones ≥20 mm
  • Willing and able to sign informed consent
  • Normal renal function
  • No stone-related surgical history
  • American Society of Anesthesiology (ASA) score 1-2

Exclusion criteria

Exclusion Criteria:

  • Congenital renal anomalies (horseshoe kidney, ureteropelvic junction obstruction)
  • Uncorrected UTI
  • Abnormal coagulation function
  • Morbid obese children (BMI≥35)
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
250 participants (estimated)
Target follow-up
12 Months
Patient registry
Yes

Groups and cohorts

  • Super-Mini Percutaneous Nephrolithotomy

    Patients undergo SMP

    Procedure: Super-mini percutaneous nephrolithotomy (SMP)

  • Extracorporeal Shock Wave Lithotripsy

    Patients undergo ESWL

    Procedure: Extracorporeal Shock Wave Lithotripsy (ESWL)

Interventions

  • ProcedureSuper-mini percutaneous nephrolithotomy (SMP)

    SMP will be performed under general anesthesia in prone/supine position. Renal puncture will be performed under ultrasound/fluoroscopy guidance based on the preference of the participating surgeon. Tracts will be dilated to 14 Fr. Stone fragmentation will be performed with holmium laser and fragments will be extracted with the active suction system. For the exit strategy, placement of a nephrostomy tube or JJ stent will be decided by the participating surgeon.

  • ProcedureExtracorporeal Shock Wave Lithotripsy (ESWL)

    ESWL will be performed under sedation/analgesia, shock wave lithotripsy parameters will be determined based on the device and the settings of local center. For patients requiring multiple sessions, maximum 3 (or more) sessions will be allowed. Ureteral stenting prior to ESWL will be performed based on the decision of the participating center.

06

What researchers measure

Primary outcomes

  1. Stone free rate

    Stone clearance on the computed tomography (2mm thickness)

    Time frame: 3-months

Secondary outcomes

  1. blood loss

    Number of participants requiring blood transfusion after the procedure

    Time frame: Postoperative day 1

  2. auxiliary procedures

    Number of patients requiring additional auxiliary procedures such as second look PCNL, SWL, Ureteroscopy

    Time frame: Postoperative month 3

  3. hospital stay

    From date of admission until the date of discharge,length of hospital stay

    Time frame: Postoperative month 3

  4. complications

    Rate of postoperative complications using the Clavien-Dindo system

    Time frame: Postoperative month 3

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Study locations

No study locations are listed for this record.

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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 30, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04317443
Lead sponsor
The International Alliance of Urolithiasis
Responsible party
Sponsor
First posted
Mar 23, 2020
Start date
May 1, 2020 (estimated)
Primary completion
May 1, 2021 (estimated)
Completion
Sep 1, 2021 (estimated)
Last update
Apr 30, 2020

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Apr 2020. You cannot join it, but the record below documents what was studied.

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