Stent removal helps to spontaneously pass ureteral stones

A treatment strategy to help select patients who may not need secondary intervention to remove symptomatic ureteral stones after previous stenting

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN12112914

Enrollment

202

Registered

2019-08-05

Start date

2019-11-01

Completion date

Unknown

Last updated

2025-01-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Ureteral stone patients after previous stenting Urological and Genital Diseases Ureteral stone patients after previous stenting

Interventions

Methodology: Patients presenting with a solitary, radiopaque, ureteral stone after double J stenting are eligible for participation. They will be randomized 1:1 for stent removal 1 vs. 4 weeks after s

pethidine as second choice) and

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Ureteral stone 2. Previous stenting 3. Stone still in place 4. Aged over 18 years

Exclusion criteria

Exclusion criteria: Does not meet inclusion criteria

Design outcomes

Primary

Measure	Time frame
Ureteral stone-free rate at the time of and 24 hours after double J stent removal. As assessed by patient interview and/or radiological assessment.	—

Secondary

Measure	Time frame
Measured continuously throughout trial: 1. Predictors of spontaneous stone passage: 1.1 Stone size (diameter) 1.2 Stone location [proximal, mid- or distal ureter] 1.3 Stone density 1.4 Stent dwell time 1.5 Stone movement while stent indwelling. To assess stone movement, the dislocation of the stone from the initial spot immediately after double J placement was measured and compared to the X-ray pictures before stent removal. Because natural breathing movements of the patient can make evaluation of the exact stone location rather difficult, only stone movement of =5cm is measured and counted as stone movement. 1.6 Patient’s age 1.7 Patient’s gender 2. Adverse events: 2.1 Pain-induced additional use of analgesics 2.2 Urinary tract infection (UTI)	—

Measure

Time frame

Measured continuously throughout trial: 1. Predictors of spontaneous stone passage: 1.1 Stone size (diameter) 1.2 Stone location [proximal, mid- or distal ureter] 1.3 Stone density 1.4 Stent dwell time 1.5 Stone movement while stent indwelling. To assess stone movement, the dislocation of the stone from the initial spot immediately after double J placement was measured and compared to the X-ray pictures before stent removal. Because natural breathing movements of the patient can make evaluation of the exact stone location rather difficult, only stone movement of =5cm is measured and counted as stone movement. 1.6 Patient’s age 1.7 Patient’s gender 2. Adverse events: 2.1 Pain-induced additional use of analgesics 2.2 Urinary tract infection (UTI)

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Countries

Switzerland

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 28, 2026