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Predictors of Epidural Depth in Percutaneous Nephrolithotomy and Model Development

StatusCompleted
PhaseNot specified
Started2014-01-01
View on ClinicalTrials.gov ↗

Amendment history

2026-09-30
Completed without a posted recruiting period
Primary completion confirmed: December 2025 (last estimated August 2026)
2026-07-13
Study Identification, Study Status, Sponsor/Collaborators, Conditions, Outcome Measures, Eligibility, Contacts/Locations v1
Eligibility criteria-35 characters
Inclusion Criteria: (1) ageAge ≥ 18 years; (2) successful Successful epidural puncture and catheter placement using the midline approach; (3) clear Clear documentation of puncture level and puncture depth in the anesthesia record. Exclusion Criteria: (1) duralDural puncture during anesthesia (including those who subsequently had a successful repuncture); (2) use Use of the paramedian approach for epidural puncture; (3) uncertain Uncertain epidural anesthesia effect requiring combined general anesthesia; (4) incomplete Incomplete clinical data.
Secondary endpoints+41 characters
Adjusted R² Root mean square error (RMSE)
Primary endpoints1 entry, revised
epiduralEpidural depth
Study title-54 characters
AnalysisPredictors of Factors Influencing Epidural Depth in Patients Undergoing Percutaneous Nephrolithotomy and Model Development of a Predictive Model
2026-07-05
Original filing
Tongji Hospital
197 trials monitored
See 2 trials at risk
Accurate estimation of epidural depth is critical for safe epidural anesthesia during percutaneous nephrolithotomy (PCNL). Although various imaging modalities can predict epidural depth, they increase healthcare burden and are not always feasible in emergency or bedside settings. Identifying simple, easily obtainable clinical parameters-such as sex, age, and body mass index (BMI)-for predicting epidural depth has become a research priority. However, systematic investigations specifically targeting the Chinese population remain scarce. This retrospective study aims to identify independent factors influencing epidural depth in PCNL patients and to develop simple, level-specific predictive models for different puncture sites, thereby providing a practical reference for clinical epidural anesthesia.
Trial Details
NCT Number NCT07697053
Lead Sponsor Tongji Hospital
Conditions Epidural Anesthesia, Percutaneous Nephrolithotomy (PCNL)
Enrollment 3,278 participants
Start Date 2014-01-01
Primary Completion 2025-12-31 (estimated)
Study Completion 2026-08-31 (estimated)
Updated on ClinicalTrials.gov 2026-09-29