Role of Urine PH in Shock Wave Lithotripsy Outcomes in Renal Stone Disease (PHESWL)

July 14, 2026 updated by: Ahmed Abou Elezz Abdel Fattah, Benha University

EFFECT of PH on Outcomes of ESWL in Renal Stones

urolethiasis (kidney stones) is common globally, with recurrence in 50% of patients.

  • Shock Wave Lithotripsy (SWL) is a minimally invasive treatment for stones < 2 cm.
  • Hypothesis: Urine pH might influence SWL success and could be manipulated pre-procedure. Aim of the work is to evaluate the role urine pH on the outcomes of shock wave lithotripsy in renal stones. patients and methods The study will be conducted over 146 patients( with single renal stone < 2 cm) in Urology department of Banha university Hopitals from Dec 2025 till Dec 2026. Exclusions: patients on pH altering drugs, multiple stones,stents. Procedure: SWL Siemens Lithoscope up to 3 sessions per patient. Data collected : Age, BMI, urine pH, specific gravity(SG), stone size, location, Hounsfield unit(HU), skin to stone distance (SSD). Analysis Chi-square& t-test; significance at p<0.05. Results Will be tabulated and statistically analyzed

Study Overview

Status

Active, not recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

146

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Egypt
    • Benha
      • Banhā, Benha, Egypt, 74111
        • Benha University Hospitals

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • single renal calculus measuring less than 2 cm in its maximum diameter were enrolled for primary treatment with extracorporeal SWL.

Exclusion Criteria:

  • receiving any pH-altering medications, had multiple renal stones, or had indwelling ureteral stents.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Screening
  • Allocation: Randomized
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
No Intervention: Role of urine PH
Other: Role of urine PH in shock wave lithotripsy outcomes in renal stone disease
Procedure: Shock Wave Iithotripsy
ESWL in renal stone disease
Procedure: Extracorporeal shock wave lithotripsy

The procedures utilized advanced lithotripsy systems, specifically the Siemens Lithoskop and a piezoelectric lithotripter (Piezolith 3000 Plus, Richard Wolf, Germany) equipped with direct-focusing shockwave technology and triple focus size localization capabilities (F1 =2 mm, F2 =4 mm, F3 =8 mm).

During the procedure, an integrated ultrasound device was primarily used to locate and continuously monitor the targeted stone in real-time, significantly minimizing radiation exposure. Fluoroscopy was employed only briefly and strictly to confirm the anatomical position and radiolucency of lower calyceal stones. The procedural parameters were standardized across the cohort: the shockwave delivery rate was set at 90 pulses per minute, with a strict safety cap of 3000 shockwaves per session. The mechanical fragmentation strategy utilized a progressive focusing technique. Treatment commenced with the smallest focal size (F1) to safely initiate stone breakdown.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Stone free rate
Time Frame: Four weeks
Four weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Benha University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 20, 2026

Primary Completion (Estimated)

July 20, 2026

Study Completion (Estimated)

October 31, 2026

Study Registration Dates

First Submitted

July 14, 2026

First Submitted That Met QC Criteria

July 14, 2026

First Posted (Actual)

July 17, 2026

Study Record Updates

Last Update Posted (Actual)

July 17, 2026

Last Update Submitted That Met QC Criteria

July 14, 2026

Last Verified

July 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • RC 19-12-2025

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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