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Rethinking Pre-Surgery urine tests: could skipping a second culture be safe?

NCT ID NCT06210425

Knowledge-focused Sponsor: Junhao Zheng Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looked at 147 kidney stone patients who had a positive urine culture before a minimally invasive surgery called mini-PCNL. Doctors gave them antibiotics and then checked if a follow-up urine culture was needed to predict infections after surgery. The goal was to see if waiting for a negative culture is necessary, which could simplify care and reduce antibiotic overuse.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this could simplify pre-surgery preparation for kidney stone patients, potentially reducing unnecessary antibiotic use.
What could go wrong
This is a small, completed study that only observes outcomes, not a treatment trial. Results may not apply to all patients or settings.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

147 people

The number who actually took part.

Started

Mar 2021

Finished

Nov 2024

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Patients received treatment with sensitive antibiotics for 5 to 7 days based on the drug susceptibility results of their initial UC upon admission. Follow-up UCs were performed on the third day after starting antibiotic treatment and again immediately before the surgery. An analysis was conducted to examine the relationship between UC results at the two specified time points and the occurrence of infectious complications following PCNL.

Ages

18 to 80 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Age ≥ 18 years. 2. Renal stone diameter ≥ 2 cm, complex renal stones, or failed ESWL treatment. 3. Consent to undergo PCNL with a positive midstream urine culture preoperatively. 4. ASA score of I or II. Exclusion Criteria: 1. Coexisting renal tumor. 2. Use of antibiotics within the past two weeks. 3. Renal dysfunction (serum creatinine \>451 μmol/L). 4. Unresolved hemorrhage or coagulation abnormalities. 5. Patients who have undergone percutaneous renal fistula or have a ureteral stent in place on the affected side. 6. Simultaneous bilateral renal stone surgery. 7. Severe underlying diseases, such as respiratory or circulatory insufficiency, that cannot tolerate anesthesia or surgery. 8. Pregnant or lactating women.

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Conditions

The condition(s) this trial relates to.

infectious disease with sepsis Kidney Calculi nephrolithiasis Sepsis urinary tract infection

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Kidney calculi Sepsis Urinary tract infections

Contacts and locations

Locations

  • The First Affiliated Hospital of Guangzhou Medical University

    Guangzhou, GuangGong, 510500, China

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